CN219223351U

CN219223351U - Cooling water tube bundle and self-holding one-step purification equipment

Info

Publication number: CN219223351U
Application number: CN202222446163.5U
Authority: CN
Inventors: 潘勇; 杨沛森; 张超; 杨久俊; 李小斌; 马炎; 谭健; 梁川
Original assignee: Tianjin Chaoyang Environmental Protection Technology Group Co Ltd
Current assignee: Tianjin Chaoyang Environmental Protection Technology Group Co Ltd
Priority date: 2021-09-14
Filing date: 2022-09-14
Publication date: 2023-06-20
Anticipated expiration: 2032-09-14
Also published as: CN115569481A; CN115475474A; CN218687848U; CN115574615A; CN218687845U; CN115540621A; CN115569483A; CN115591359A; CN218687847U; CN219209450U; CN115671939A; CN115569482A; CN219209449U; CN115475475A; CN218687849U; CN115569480A; CN218901319U; CN219223350U; CN218687851U; CN218687846U

Abstract

The application discloses a cooling water pipe assembly and self-supporting one-step purification equipment, wherein the self-supporting one-step purification equipment comprises a box body, and the box body is provided with a flue gas air inlet, a flue gas air outlet and a flue gas channel from the flue gas air inlet to the flue gas air outlet; the cooling water tube bundles comprise a plurality of rows of cooling water tubes which are vertically arranged in the flue gas channel and are arranged in a staggered row tube bundle array, and gaps are not formed between orthographic projection surfaces of two adjacent rows of cooling water tubes in the plurality of rows of cooling water tubes in the flue gas circulation direction. This application is through the special design to cooling water tube bank for get into flue gas purification channel's flue gas and go forward in cooling water tube bank's clearance tortuous, increased the heat transfer area of contact of flue gas and cooling water tube bank as far as possible, and can guarantee that the normal circulation of flue gas is unlikely to influence the purification treatment of the continuous newly entering flue gas.

Description

Cooling water tube bundle and self-holding one-step purification equipment

Technical Field

The application relates to the technical field of environmental protection equipment, in particular to a cooling water tube bundle and self-supporting one-step purification equipment.

Background

At present, most of cement kiln tail gas NOx treatment technologies still adopt an ammonia source (ammonia water, urea and the like) reducer, and because of the limitation of denitration rate, the atmospheric secondary pollution caused by the ammonia escape phenomenon which is more or less caused by excessive use of the reducer and even severely exceeds national standard regulation indexes (less than 8mg/m < 3 >).

Aiming at the ammonia escape problem, a recovery and circulation system of escaping ammonia in cement kiln ammonia process denitration tail gas is disclosed in the known related art, and the content of the escaping ammonia in the tail gas is reduced by combining a spray tower, a heat exchanger, a storage tank, a receiving tank, an absorbent and the like. However, the related technology has the defects of large equipment volume, complex deamination process, high cost, large wastewater treatment capacity and the like.

Aiming at the related technical problems, the applicant provides self-holding one-step deamination equipment, which is characterized in that a low-temperature condensation module is arranged to perform low-temperature condensation on the entering smoke to generate condensed water, escaped ammonia and acidic pollutants are dissolved in the condensed water and acid-base neutralization reaction is performed in the condensed water to generate non-volatile salt which is easy to dissolve in the condensed water, so that one-step deamination is realized, and the equipment has the advantages of small equipment volume, simple process, low cost, small wastewater treatment capacity and the like. The flue gas inlet has a certain speed, and the speed and the circulating path of the flue gas in the low-temperature condensing module are critical to the quality of the deamination effect.

Disclosure of Invention

A primary object of the present application is to provide a cooling water tube bundle for a self-contained one-step purification apparatus comprising a box having a flue gas inlet, a flue gas outlet and a flue gas passage from the flue gas inlet to the flue gas outlet;

the cooling water tube bundles comprise a plurality of rows of cooling water tubes which are vertically arranged in the flue gas channel and are arranged in a staggered row tube bundle array, and gaps are not formed between orthographic projection surfaces of two adjacent rows of cooling water tubes in the plurality of rows of cooling water tubes in the flue gas circulation direction.

Optionally, three cooling water pipes adjacent to two adjacent rows of cooling water pipes form a cooling water pipe unit distributed in a triangle, and the distribution size range of the cooling water pipe unit is as follows:

C＝1.8A～2A；

D＝0.8B～1.5B；

wherein A is the maximum width dimension of the tube section; b is the maximum length dimension of the section of the pipe; c is the center distance dimension of the tube sections of two adjacent cooling water tubes in the same row; d is the center distance dimension of the pipe sections of the cooling water pipes in the adjacent rows.

Optionally, the cooling water pipe is an arc diamond cooling water pipe, and the arc diamond cooling water pipe includes: the cross section of the cooling water pipe body is in an arc diamond shape, two ends of a short diagonal line of the cooling water pipe body are respectively large arc ends, and two ends of a long diagonal line of the cooling water pipe body are respectively small arc ends; the large arc ends at the two ends of the short diagonal are respectively connected with the small arc ends at the two ends of the long diagonal through straight edges, and the straight edges are tangent to the arc lines of the large arc ends and the small arc ends.

Optionally, the large arc ends at both ends of the short diagonal are arranged concentrically.

Optionally, the midpoint connection line of the large arc ends at the two ends of the short diagonal is perpendicular to the connection line of the small arc ends at the two ends of the long diagonal.

Optionally, the large arc end and the small arc end each comprise a fillet and a bullnose.

Optionally, the application ranges of the dimensions of the cross section of the cooling water pipe body are as follows:

A＝20～100mm；

B＝A～2A；

R ₁ ＝1/2×A；

R ₂ ＝R ₁ -t；

r ₁ ＝6～1/2×R ₁ ；

r ₂ ＝r ₁ -t；

wherein a is the short diagonal length of the cooling water pipe body 1020; b is the long diagonal length of the cooling water pipe body 1020; r is R ₁ The outer diameter of the large arc end; r is R ₂ The inner diameter of the large arc end is; t is the wall thickness of the cooling water pipe body 1020; r is (r) ₁ The outer diameter of the small arc end is; r is (r) ₂ Is the inner diameter dimension of the small arc end.

Optionally, the cooling water pipe further comprises an upper joint and a lower joint which are respectively arranged at two ends of the cooling water pipe body; the upper connector and the lower connector have the same structure and comprise plugs and connectors, the plugs are fixed at two ends of the cooling water pipe body in a sealing mode, the first ends of the connectors are fixed on the plugs in a sealing mode and are communicated with the inside of the cooling water pipe body, and the second ends of the connectors extend out of the plugs; the cross section of the plug is set to be in the shape of an arc diamond which is the same as the cross section of the cooling water pipe body, and a joint mounting hole is formed in the plug along the axial direction of the plug; the first end of the connector is sealingly secured within the connector mounting bore.

The second aspect of the present application provides a self-contained one-step purification apparatus for deaminating a flue gas containing water vapor, ammonia gas and an acidic contaminant, the self-contained one-step purification apparatus comprising:

the box body is provided with a flue gas air inlet and a flue gas air outlet and a flue gas purifying channel from the flue gas air inlet to the flue gas air outlet;

the low-temperature condensation module is arranged in the flue gas purification channel and comprises the cooling water tube bundle, the low-temperature condensation module cools and condenses the flue gas entering the flue gas purification channel from the flue gas air inlet, the water vapor is condensed into condensed water, ammonia gas and acidic pollutants are dissolved in the condensed water, and acid-base neutralization reaction occurs in the condensed water to generate salt which is easy to dissolve in the non-volatile property of the condensed water.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application. In the drawings:

FIG. 1A is a schematic illustration of a self-contained one-step purification process flow according to an embodiment of the present application;

FIG. 1B is a schematic view (front view) of a self-contained one-step purification apparatus according to an embodiment of the present application;

FIG. 1C is a top view of FIG. 1B;

FIG. 1D is a block diagram (front view) of a self-contained one-step purification apparatus according to an embodiment of the present application;

FIG. 1E is a side view of FIG. 1D;

FIG. 2A is a schematic view (front view) of a self-contained one-step purification apparatus (round tube) according to an embodiment of the present application;

FIG. 2B is a top view of FIG. 2A;

FIG. 2C is a block diagram (front view) of a self-contained one-step purification apparatus (round tube grouping) according to an embodiment of the present application;

FIG. 2D is a top view of FIG. 2C;

FIG. 2E is a perspective view of a self-contained one-step purification apparatus (round tube grouping) according to an embodiment of the present application;

FIG. 3A is a front view of a cryocondensation module (cooling water circulating along grouped water tubes) according to an embodiment of the present application;

FIG. 3B is a top view of FIG. 3A;

FIG. 3C is a left side view of FIG. 3A;

FIG. 3D is a perspective cross-sectional view of a cryocondensation module (cooling water circulating along grouped water tubes) according to an embodiment of the present application;

FIG. 4A is a front view of a cryocondensation module (straight-through regions with cooling water circulating along the grouped water pipes and adjustable cooling water amount) according to an embodiment of the present application;

FIG. 4B is a top view of FIG. 4A;

FIG. 4C is a left side view of a cryocondensation module (straight-through regions with cooling water circulating along the grouped water pipes and adjustable cooling water volume) according to an embodiment of the present application;

FIG. 5A is a front view of a cryocondensation module (flow-through each zone cooling water adjustable) according to an embodiment of the present application;

FIG. 5B is a top view of FIG. 5A;

FIG. 5C is a left side view of FIG. 5A;

FIG. 6A is a front view of a cryocondensation module (straight-through regions with cooling water circulating along the grouped water pipes and adjustable cooling water amount) according to an embodiment of the present application;

FIG. 6B is a top view of FIG. 6A;

FIG. 6C is a left side view of FIG. 6A;

FIG. 6D is a perspective cross-sectional view of a cryocondensation module (straight-through regions with cooling water circulating along the grouped water pipes and adjustable amounts of cooling water) according to an embodiment of the present application;

FIG. 7A is a top view of a circular arc diamond tube according to an embodiment of the present application;

FIG. 7B is a front view of a circular arc diamond tube according to an embodiment of the present application;

FIG. 7C is a cross-sectional view of a circular arc diamond tube according to an embodiment of the present application;

FIG. 8 is a diagram of an arrangement of circular-arc diamond tubes according to an embodiment of the present application;

FIG. 9A is a front elevation view of an arcuate diamond tube expander according to an embodiment of the present application;

FIG. 9B is an enlarged view of a portion of FIG. 9A;

FIG. 10A is a rear elevation view of an expanded pipe of an arcuate diamond tube in accordance with an embodiment of the present application;

FIG. 10B is an enlarged view of a portion of FIG. 10A;

FIG. 10C is a top view of FIG. 10A;

FIG. 11A is a front view of a modular, self-contained, one-step purification apparatus according to an embodiment of the present application;

FIG. 11B is a top view of a modular, self-contained, one-step purification apparatus according to an embodiment of the present application;

FIG. 11C is a left side view of a modular self-contained one-step purification apparatus according to an embodiment of the present application;

FIG. 12 is a schematic view of a demisting, water collecting and water baffle structure according to an embodiment of the present application;

fig. 13 is a simplified schematic diagram of convective heat transfer of a cryocondensation module according to an embodiment of the present application.

The low-temperature condensing module comprises a low-temperature condensing module body 1, a box body 101, an upper box plate 1011, a lower box plate 1012, a front box plate 1013, a rear box plate 1014, a cooling water tube bundle 102, a cooling water tube 1020, a large circular arc end 1020b, a small circular arc end 1020a, a straight edge 1020c, a plug 1022, a cooling water inlet tube 103, a flow regulating valve 1031, a cooling water inlet header 1032, a water diversion tube 1033, a cooling water return tube 104, a round tube elbow 105, a spraying device 2, an atomization device 3, a flue gas air inlet 4, a flue gas air outlet 5, a water pump 9, a condensate water discharge port 10, an upper water tank 11, an upper water tank 111, a lower water tank 121, a demisting water collecting baffle 13, a steel wire mesh 14, a rubber sealing gasket 15, a sealant 16, an annular groove 17, an annular bulge 18, an annular clamping bulge, a 20 mounting base 21 lower joint 211 plug 212, a sealing ring 213 joint 22 upper joint, a condensate water collecting device 23, a cooling water inlet tube 103a cooling water return port 104a cooling water return port and a water pipe 102b mounting hole.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein.

In the present application, the terms "upper", "lower", "inner", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "disposed," "configured," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

At present, most of high-temperature flue gas treatment technologies such as cement kiln flue gas NOx treatment technologies still use an ammonia source (ammonia water, urea and the like) reducer, and due to the limitation of denitration rate, the reducer is used more or less excessively, so that the reducer exceeds, even seriously exceeds, national standard regulation indexes (less than 8 mg/m) ³ ) Secondary pollution of the atmosphere caused by the ammonia escape phenomenon.

The prior art discloses a recovery and circulation system of escaped ammonia in cement kiln ammonia process denitration flue gas and a control method thereof, wherein the recovery and circulation system comprises a spray tower, a heat exchanger, a storage tank and a receiving tank. The denitration flue gas is conveyed to a heat exchanger by a fan to be cooled, then enters a tower from the bottom of a spray tower, an absorbent in a storage tank is pumped to the spray tower by a pump to be in contact reaction with denitration flue gas from bottom to top, so as to obtain an ammonia-containing absorbent and denitration flue gas, the ammonia-containing absorbent flows into a receiving tank, supernatant fluid after precipitation enters the spray tower by a pump to be in repeated contact with the denitration flue gas until a saturated ammonia absorbent is formed, mud settled at the bottom of the receiving tank is periodically pumped to a cement kiln, the saturated ammonia absorbent is pumped to an ammonia water storage tank to be mixed with ammonia water for denitration reaction, and ammonia salt is decomposed to be used as part of ammonia source to react with nitrogen oxides in the SNCR (selective non-catalytic reduction) denitration process, so that recycling of escape ammonia is realized.

Although the prior art can solve the problem of ammonia escape, the prior art has the defects of low deamination efficiency, large equipment volume and high cost, and the concrete analysis is as follows:

1. the prior art needs to exchange heat firstly and spray then collect recycling for flue gas treatment, the treatment steps are more to lead to complex deamination technology, deamination efficiency is low, and because of complex technology, a heat exchanger, a spray tower, a storage tank, a receiving tank and the like are needed to lead to large volume of the whole deamination equipment, and cost is high.

2. The prior art discloses that flue gas is firstly conveyed to a heat exchanger for cooling, but the whole technical scheme disclosed by the prior art is understood to obtain that the aim of adopting a pre-heat exchanger for cooling the flue gas in the prior art is to avoid that high-temperature ammonia which is easy to volatilize is not easily absorbed by an absorbent in a subsequent spray tower process on one hand, and the absorption efficiency of the spray tower on ammonia can be improved by carrying out limited cooling on the high-temperature flue gas through the pre-heat exchanger, and on the other hand, the working pressure of the spray tower can be reduced by adopting the pre-heat exchanger for cooling the high-temperature ammonia, but the prior art still adopts the spray tower for explaining that the means of solving the ammonia escape problem in the prior art is still the traditional spray tower ammonia absorption thought, and the spray tower has the problems of large spray water quantity and large subsequent sewage purification treatment capacity.

3. This prior art ammonia-containing absorbent requires a long time to settle into the receiving tank, further resulting in inefficiency of this prior art deamination.

Thus, in combination, the recovery and recycling system of escaped ammonia of the prior art has the problems of complex process, low deamination efficiency, large equipment volume, high cost and large wastewater treatment capacity.

In order to solve the problems of complex process, low deamination efficiency, large equipment volume, high cost and large wastewater treatment capacity of the deamination system in the prior art, the application provides self-holding one-step purification equipment and purification method which can automatically finish physical and chemical reactions of components in flue gas to be treated to realize ammonia absorption (self-holding), and have small equipment volume (compact type), simple process (one-step method), low cost and small wastewater treatment capacity. The purification equipment provided by the application not only can be applied to cement kiln flue gas purification scenes, but also can be applied to scenes such as power plants or coal yards for flue gas purification. However, it should be noted that the purification apparatus provided in the present application can be applied only to the purification treatment of flue gas containing water vapor, ammonia gas, and acidic pollutants.

As a preferred embodiment of the application, the purification device is applied to the purification of cement kiln ammonia process denitration flue gas. At present, ammonia escape exists in cement kiln flue gas generally, and the flue gas discharged by the cement kiln is high-temperature, water vapor, ammonia gas and flue gas with acidic pollutants.

The purifying device of the embodiment is provided with a flue gas air inlet 4, a flue gas air outlet 5 and a flue gas purifying channel from the flue gas air inlet 4 to the flue gas air outlet 5, and the purifying device further comprises a low-temperature condensing module 1, wherein the low-temperature condensing module 1 is arranged in the flue gas purifying channel.

The main structure of the purification equipment can realize the purification treatment of the cement kiln flue gas, and the purification principle is as follows:

the cement kiln flue gas enters into the flue gas purification channel from the flue gas air intake 4 of clarification plant, the low temperature condensation module 1 in the flue gas channel is to getting into the flue gas cooling condensation, will be in the flue gas vapor cooling condensation become the comdenstion water (the ideal state is hoped to be with whole vapor condensation become the comdenstion water), the ammonia that contains in the flue gas and be acid pollutant (for example SO2 and CO 2) dissolve in the comdenstion water (physical purification), this is the first layer purification that this application clarification plant realized, but because flue gas temperature is higher, the ammonia or the acid pollutant that dissolve in the comdenstion water volatilize from the comdenstion water easily, but this application clarification plant innovation lies in taking place acid-base neutralization reaction (chemical purification) with ammonia and acid pollutant and being dissolved in the comdenstion water simultaneously and generating the salt of the non-volatile nature of easily dissolving in the comdenstion water.

The cryocondensation module 1 in the purification device of the present application may be various, such as oil immersion self-cooling cryocondensation, freezing cryocondensation, and the like. As a preferred embodiment of the present application, the cryocondensation module 1 employs water-cooled cryocondensation. The purification device is provided with a cooling water inlet 103a and a cooling water return port 104a, and the low-temperature condensation module 1 is communicated with the cooling water inlet 103a and the cooling water return port 104a. The cryocondensation module 1 comprises a cooling water tube bundle 102 vertically arranged in the flue gas purification channel and arranged in an array, and end joint assemblies communicated with the upper end and the lower end of the cooling water tube bundle 102, wherein the end joint assemblies and the cooling water tube bundle 102 form a cooling water circulation pipeline for cooling water to flow from the cooling water inlet to the cooling water return water outlet.

After entering the flue gas purifying channel from the flue gas air inlet 4, the flue gas is fully contacted with the surface of the cooling water tube bundle 102 flowing with cooling water, water vapor in the flue gas is condensed into condensed water on the surface of the water tube bundle 102, and flows to the bottom of the purifying device along the surface of the cooling water tube. Because the cooling water is not in direct contact with the flue gas, the cooling water in the cooling water tube bundle 102 is not polluted and is recycled all the time after being cooled. And the consumption of the cooling water in the cooling water tube bundle 102 is far smaller than that in a spray tower in the prior art, and the volatile water quantity in the cooling water cooling process can be completely compensated after the condensate water of the purifying equipment is purified and recovered.

Fig. 1B shows the working principle of the purification device of the present application. The purifying device can be matched with the water pump 9, the cooling water circulation pipeline and the cooling tower for use. The water pump 9 supplies driving force to the cooling water entering from the cooling water inlet 103a through the cooling water inlet 103 of the cooling water circulation pipeline, the cooling water flows in the cooling water circulation pipeline, then flows out from the cooling water outlet 104a into the cooling tower, and the water of the cooling tower flows back to the water pump 9 to realize cooling water circulation. The flue gas of the cement kiln enters the low-temperature condensing module 1 through the flue gas air inlet 4 of the low-temperature condensing module 1 to fully exchange heat with the cooling water tube bundle 102, the cooling water tube bundle 102 rapidly cools the flue gas, and importantly, the cooling water tube bundle 102 condenses the water vapor of the high-temperature flue gas into condensed water after cooling, and the condensed water adsorbs alkaline ammonia molecules (ammonia gas) and cement raw material dust (calcium-containing) in the flue gas to obtain the cement kiln flue gasAnd acid SO contained in flue gas ₂ With CO ₂ And (3) waiting for gas. Alkaline ammonia molecules and cement raw dust, and acidic SO ₂ With CO ₂ Acid-base neutralization reaction is carried out in condensed water to form non-volatile salts such as ammonium bisulfate, ammonium bicarbonate, calcium sulfate, calcium carbonate and the like.

The purifying device further comprises a condensed water collecting device 23, wherein the condensed water collecting device 23 is arranged at the bottom of the low-temperature condensing module 1, and the condensed water collecting device 23 is connected with the condensed water discharging port 10. The condensed water generated on the surface of the cooling water tube bundle 102 flows to the bottom of the purifying apparatus along the surface of the water tube, is collected by the condensed water collecting device 23, and finally is discharged through the condensed water discharge port 10.

Further, the discharged condensed water can be treated into reusable or discharged purified water (about 90 percent) and salt-containing high-concentration water (the salt dust content is less than 3 percent) about 10 percent by a membrane separation method, the salt-containing high-concentration water is pumped and sprayed onto a clinker grate cooler at the kiln head of a cement kiln, on one hand, the clinker can be rapidly cooled, on the other hand, calcium sulfate and calcium carbonate substances in the water are adhered to the surface of the clinker and are brought into components of cement, and ammonia salt in the water is rapidly heated and decomposed into ammonia and SO (sulfur dioxide) by the clinker ₂ Then enters a decomposing furnace of the cement kiln along with tertiary air, wherein ammonia molecules exert denitration function in the decomposing furnace to be utilized, SO ₂ Then the calcium sulfate is reacted with CaO to form calcium sulfate which enters the clinker, no secondary pollution is caused in the whole process, and all substances are recycled.

In the above known prior art, the use of a heat exchanger for cooling the denitrated flue gas is also disclosed, but its role in the above prior art is quite different from that of the cryocondensation module 1 in the present application. The specific differences are that:

1. Different inventive concepts

The prior art mainly sprays the absorbent through the spray tower to deaminize, and the heat exchanger is arranged to reduce the load of the spray tower; the method creatively utilizes the characteristic that the flue gas of the cement kiln contains water vapor, and cools and condenses the water vapor in the high-temperature flue gas into condensed water, ammonia and SO through the low-temperature condensation module 1 ₂ 、CO ₂ The acid gas is easy to be dissolved in condensed water in the low-temperature environment of the low-temperature condensation module 1 (physical process), and ammonia molecules with alkalinity and SO with acidity are simultaneously formed ₂ With CO ₂ The acid-base substances in the water are subjected to neutralization reaction to form non-volatile substances (chemical process) such as ammonia bisulfate, ammonia bicarbonate, calcium sulfate, calcium carbonate and the like, which are discharged along with condensed water, so that the problem of ammonia escape of the cement kiln is effectively solved; the deamination reaction directly occurs in the heat exchanger without adding any absorbent.

2. The function of the above-mentioned prior art heat exchanger is objectively different from that of the cryocondensation module 1 of the present application

1) Although the prior art describes that the heat exchanger can cool the flue gas to 50 ℃, the heat exchanger is not disclosed in the heat exchanger for deamination, and the heat exchanger has no deamination effect in the aspect of the prior art, because the denitration flue gas cooled by the heat exchanger enters a spray tower from the conception of the prior art, the spray tower realizes ammonia absorption by spraying an absorbent, and the ammonia absorption is not deliberately divided into two steps for a designer, namely the ammonia absorption is carried out in the heat exchanger part, and the ammonia absorption is also carried out in the subsequent spray tower, so that the difficulty of ammonia recovery is only increased;

2) The heat exchanger does not need to perform deamination from the prior art inventive concept, since deamination by spraying the absorbent is also required, and if the heat exchanger is capable of deamination, no further treatment by spraying the tower is required.

3) It is important that the conventional heat exchanger generally does not generate condensed water as much as possible in the heat exchange process, and the condensed water can corrode pipelines of the heat exchanger for a long time, so that the service life of the heat exchanger is reduced, and the purpose of the heat exchanger in the prior art is not to generate condensed water.

3. The known prior art has a number of disadvantages

1) There is a risk of the absorber escaping, the ammonia absorber used is formic acid, volatilization and escaping of the absorber also need further treatment, and formic acid is a flammable substance;

2) The wastewater treatment capacity after the absorbent absorbs ammonia is large, and the treatment cost is high;

3) Because the mode of spraying the absorbent cannot fully utilize the absorbent, the absorbent has to be recycled in order to improve the utilization rate of the absorbent, and the circulating return pipeline can be severely corroded after a long sedimentation period, so that the scheme is difficult to implement in a floor mode;

4) It is difficult to detect whether the absorbent is saturated or not, and ammonia slip is easily caused by ineffective absorption.

The purification device of the application is different from the heat exchanger in the prior art, because the application scene of the purification device of the application is limited to the purification of the flue gas containing water vapor, ammonia gas and acidic pollutants, and the purification of physical and chemical processes is realized by pursuing more condensed water generated in the cooling process, which is completely different from the conception of the existing heat exchanger. In addition, the purifying equipment realizes self-sustaining one-step deamination and has the advantages of simple deamination process, small equipment size and low cost.

In addition, the purification device is not only suitable for deamination, but also alkaline ammonia, cement raw meal dust and SO which is acidic in flue gas in condensed water generated by the low-temperature condensation module 1 ₂ 、CO ₂ The neutralization reaction of acid-base substances such as NOx and the like, SO the purifying equipment can also be used for removing SO ₂ CO removal ₂ And denox.

The cooling water tube bundle 102 of the cryocondensation module 1 of the present application is arranged in a fork tube bundle array. Specifically, as shown in fig. 2B, the cooling water tube bundle 102 includes a plurality of rows of cooling water tubes 102a arranged along the flue gas flowing direction, and two adjacent rows of cooling water tubes 102a are staggered in the flue gas flowing direction and have no space between the orthographic projection surfaces in the flue gas flowing direction.

As a preferred embodiment of the present application, the orthographic projection surfaces of two adjacent rows of cooling water pipes 102a in the smoke flowing direction of the plurality of rows of cooling water pipes 102a are intersected. The arrangement mode ensures that the flue gas entering the flue gas purifying channel goes forward in a zigzag way in the gap of the cooling water tube bundle 102, so that the heat exchange contact area between the flue gas and the cooling water tube bundle 102 is increased as much as possible, and the normal circulation of the flue gas can be ensured without affecting the continuous purification treatment of the newly-entered flue gas.

As a modification of the arrangement of the cooling water bundles 102, in other embodiments, boundaries of orthographic projection surfaces of two adjacent rows of cooling water tubes 102a among the plurality of rows of cooling water tubes 102a in the flue gas flowing direction coincide. That is, the maximum width dimension of one cooling water pipe 102a of the former row is exactly equal to the gap width between two adjacent cooling water pipes 102a of the latter row. The arrangement can also avoid the situation that part of flue gas directly passes through gaps existing in the front-rear direction of two adjacent rows of cooling water pipes 102a and does not contact with the surfaces of the cooling water pipes 102a for heat exchange.

In the present application, the cooling water pipe 102a may be in the shape of a circular pipe, an elliptical pipe, a rectangular pipe, a rhombic pipe, or the like. However, in consideration of how to achieve the smallest possible resistance of the flue gas in the cooling water tube bundle 102, the largest possible heat exchange contact area between the flue gas and the cooling water tube bundle 102, and the highest possible heat exchange efficiency between the cooling water tube bundle 102 and the flue gas, a fine design of the shape of the cooling water tube bundle 102 is required.

For this reason, as a preferred embodiment of the present application, there is proposed a circular arc diamond-shaped cooling water pipe, as shown in fig. 7A to 7C, comprising: the cooling water pipe body 1020, the cross section of the cooling water pipe body 1020 is in a circular arc diamond shape, two ends of a short diagonal line of the cross section of the cooling water pipe body 1020 are respectively provided with a large circular arc end 1020b, and two ends of a long diagonal line are respectively provided with a small circular arc end 1020a;

the large arc end 1020b at the two ends of the short diagonal line is connected with the small arc end 1020a at the two ends of the long diagonal line through the straight edge 1020c, and the straight edge 1020c is tangent to the arc line of the large arc end 1020 b.

As shown in fig. 7A-7C, the radius of curvature of the large arc end 1020b is much larger than the radius of curvature of the small arc end 1020a, i.e., the curvature of the large arc end 1020b is much smaller than the curvature of the small arc end 1020a, and forms an acute angle with the two straight sides 1020C due to the large curvature of the small arc end 1020 a.

The cooling water pipe body 1020 has a strip-shaped structure, and the inside of the cooling water pipe body is of a hollow structure and can be used for cooling water to flow. When the cooling water pipe 102a is applied to the cryocondensation device, the small arc ends 1020a of the cooling water pipe body 1020 are horizontally arranged along the direction from the flue gas inlet 4 to the flue gas outlet 5, that is, horizontally arranged along the left-right direction of the cryocondensation device, and the middle point connecting line of the two large arc ends 1020b is perpendicular to the connecting line of the two small arc ends 1020a, that is, the two large arc ends 1020b are horizontally arranged along the front-back direction of the cryocondensation device.

In the embodiment of the application, the cooling water pipe body 1020 with the circular arc diamond-shaped cross section is defined as a circular arc diamond-shaped pipe, and compared with the cooling water pipe with the cross section in the shape of a circle, an ellipse, a diamond and the like, the larger heat exchange contact area and smaller smoke resistance of smoke and the cooling water pipe can be realized. The specific analysis is as follows:

compared with a circular tube:

the length of the short diagonal line of the circular arc rhombus pipe is the same as the diameter of the original circular cooling water pipe, and the length of the long diagonal line is larger than the diameter of the original circular cooling water pipe, so that the surface area of the two ends of the improved circular arc rhombus pipe is larger than that of the original circular cooling water pipe, and the contact area of the cooling water pipe and the cement kiln flue gas is increased, namely the heat exchange area is increased.

In addition, since the radius of curvature of the small circular arc end 1020a of the cooling water pipe body 1020 is far smaller than that of the large circular arc end, that is, the two ends of the cooling water pipe body 1020 are acute angles with smaller included angles, compared with the shape of the two ends of the circular cooling water pipe, the wind resistance of the cooling water pipe body 1020 in the shape of the circular diamond can be smaller at the two ends, and therefore the circular diamond realizes resistance reduction compared with the circular shape.

Comparing with oval tube:

the circular arc rhombus tube has two different points compared with the elliptical tube, the first difference is that the large circular arc end 1020b and the small circular arc end 1020a in the cooling water tube body 1020 of the present application are connected through the straight edge 1020c, and the elliptical tube is connected through the circular arc edge. When the two cooling water pipes 102a are arranged in staggered mode, the flowing space formed between the two elliptic pipes is of a structure with two large ends and a small middle, and the flowing space formed between the two circular arc rhombic pipes is smoother in size, so that the flow of tail gas is facilitated, and the influence on the flow of the tail gas due to the change of the size of the flowing space can be avoided.

The second difference is that, in order to form the circular arc diamond structure in the present application, under the condition that the large circular arc end 1020b with a large radius of curvature is uniform in size, the radius of curvature of the other small circular arc end 1020a is necessarily that the oval pipe is larger than that of the circular arc diamond pipe, so that the wind resistance of the circular arc diamond pipe at two ends is smaller than that of the oval pipe, and the technical effect of resistance reduction can be achieved.

Compared with a conventional diamond tube:

compared with the rhombus pipe, the cross section shape of the circular arc rhombus pipe is equivalent to that of replacing the upper sharp corner end and the lower sharp corner end of the cross section of the rhombus pipe with the large circular arc end 1020b with small curvature and replacing the left sharp corner end and the right sharp corner end with the small circular arc end with large curvature. The upper and lower ends of the circular arc rhombus pipe are large circular arc ends 1020b, and compared with the upper and lower ends of the rhombus pipe, the circular arc transition is adopted to enable the flow of the flue gas to be more stable, and in addition, the left and right sharp corners are replaced by small circular arc ends with large curvature, so that the flue gas can be prevented from flowing out at the rear end.

In addition, the diamond-shaped pipe with the right and left ends being sharp corners can cause the deformation of the right and left ends to be too large, the breakage is easy to occur, the thickness of the two ends of the diamond-shaped pipe is generally larger than that of other parts due to structural limitation, the heat conduction paths of cooling water in the diamond-shaped pipe at the two ends are increased, and the heat exchange efficiency is reduced. The thickness at the two ends of the arc diamond-shaped pipe is close to the thickness of other parts by arranging the small arc structure, so that the heat conduction paths of cooling water at the two ends are not increased, and the heat exchange efficiency is not affected.

This embodiment has reached the heat transfer area that increases condenser tube body 1020 both ends to utilize large circular arc end 1020b and small circular arc end 1020a to reduce the resistance that receives when cement kiln tail gas flows, make the purpose that cement kiln tail gas steadily flows, thereby realized promoting the area of contact of cement kiln tail gas and condenser tube body 1020, and make cement kiln tail gas can steadily flow, promote the technological effect of the cooling efficiency of cement kiln tail gas, and then solved condenser tube among the correlation technique and had the heat transfer area less, and the resistance to cement kiln tail gas flow is great, the problem of the cooling efficiency of promotion cement kiln tail gas that can not be fine.

The midpoint connection of the large arc ends 1020b at both ends of the short diagonal is perpendicular to the connection of the small arc ends 1020a at both ends of the long diagonal.

Both the large arc end 1020b and the small arc end 1020a include fillets and fillets. In order to avoid the problem that the thickness of the cooling water pipe body 1020 varies due to the arrangement of the fillets at the upper and lower ends and the left and right ends, the fillets and the fillets of the large arc end 1020b are concentrically arranged in the present embodiment, and the fillets of the small arc end 1020a are concentrically arranged.

Because the cross section of the cooling water pipe body 1020 still has a larger influence on the heat exchange efficiency in the dimension design, in order to reasonably utilize the space and improve the heat exchange efficiency, the application ranges of the dimensions of the cross section of the cooling water pipe body 1020 in this embodiment are as follows:

A＝20～100mm；

B＝A～2A；

R ₁ ＝1/2×A；

R ₂ ＝R ₁ -t；

r ₁ ＝6～1/2×R ₁ ；

r ₂ ＝r ₁ -t；

Wherein a is the short diagonal length of the cooling water pipe body 1020; b is the long diagonal length of the cooling water pipe body 1020; r is R ₁ The outer diameter dimension of the large arc end 1020 b; r is R ₂ The inner diameter dimension of small circular arc end 1020 a; t is the wall thickness of the cooling water pipe body 1020; r is (r) ₁ The outer diameter of the small arc end 1020 a; r is (r) ₂ Is the inner diameter dimension of large arc end 1020 b.

Because the cooling water pipe 102a in the present application is a circular arc rhombus pipe, the difficulty in installation is higher than that of a circular pipe, the tightness of the joint is difficult to ensure, and the connection with the water inlet and return pipelines is also inconvenient. The cooling water pipe 102a provided in the present embodiment further includes an upper joint 22 and a lower joint 21 respectively provided at both ends of the cooling water pipe body 1020; the upper connector 22 and the lower connector 21 have the same structure, and each of the upper connector 22 and the lower connector 21 includes a plug 211 and a connector 213, the plug 211 is sealed and fixed at two ends of the cooling water pipe body 1020, a first end of the connector 213 is sealed and fixed on the plug 211 and is communicated with the interior of the cooling water pipe body 1020, and a second end extends out of the plug 211.

Specifically, it should be noted that, the plugs 211 are used to plug the two ends of the cooling water pipe body 1020, the cross section of the plugs 211 may be equal to or greater than the cross section of the cooling water pipe body 1020, and the two ends of the cooling water pipe body 1020 are sealed by the plugs 211. The fitting 213 is mounted on the plug 211 by providing a mounting position for the plug 211, so that the plug 213 can be mounted on the plug 211 and then connected to the water inlet and return lines by the plug 213. The joint 213 may be provided in a configuration that facilitates connection, such as a circle. Through the setting of end cap 211 and joint 213, realized improving the leakproofness of condenser tube body 1020, also be convenient for simultaneously with advance the technical effect that water and return line are connected, and then be difficult to guarantee the leakproofness of its junction when having solved among the correlation technique non-circular condenser tube installation to also be inconvenient for with advance the connection of water and return line, lead to the comparatively trouble problem of installation.

Further, the cross section of the plug 211 is provided with an arc diamond shape with the same cross section and positioned on the cooling water pipe body 1020, and the plug 211 is axially provided with a joint mounting hole which is communicated with the inside of the cooling water pipe; the first end of the fitting 213 is sealingly secured within the fitting mounting bore.

To improve the sealability of the joint 213 and the joint mounting hole, the first end of the joint 213 is screwed to the joint mounting hole, and a screw may be injected to improve the sealability. To facilitate connection of the fitting 213 to external equipment, the end of the fitting 213 remote from the plug 211 is also provided with internal or external threads.

The joint mounting hole is internally provided with an annular groove, the annular groove is internally provided with a sealing ring 212, the joint 213 is in threaded connection with the joint mounting hole and abuts against the sealing ring 212 in the annular groove, and therefore the tightness of the joint 213 and the joint mounting hole can be improved.

In this application, as shown in fig. 8, two adjacent rows of cooling water pipe bodies 1020 form a triangular cooling water pipe unit apart from three adjacent cooling water pipe bodies 1020, and the arrangement size range of the cooling water pipe unit is:

C＝1.8A～2A；

D＝0.8B～1.5B；

wherein A is the maximum width dimension of the tube section; b is the maximum length dimension of the section of the pipe; c is the center distance dimension of the tube sections of two adjacent cooling water tube bodies 1020 in the same row; d is the center-to-center dimension of the tube cross sections of the adjacent row of cooling water tube bodies 1020.

When the cooling water pipe 102a is an arc rhombus pipe, a is the maximum width of the short diagonal line of the arc rhombus pipe; b is the maximum length of the long diagonal line of the arc diamond pipe; c is the center distance between two adjacent circular arc rhombus pipes in the same row; d is the horizontal center distance of two circular arc rhombus pipes in adjacent rows.

FIG. 13 shows a simplified diagram of the convective heat transfer of the cryocondensation module of the present application, where s ₁ Is the row spacing of the fork tube bundles, s ₂ Is the interval between the rows of the fork row tube.

The heat exchange of the flue gas side of the low-temperature condensation module is a fluid horizontal-scanning fork-row tube bundle, and the relation between the surface average heat transfer coefficient h and the dimensionless heat transfer coefficient Nu is as follows:

where l is the characteristic length and λ is the thermal conductivity of the fluid.

For the investigated flue gas heat exchange conditions, the reynolds number of the flow is in the range of about re=10 ³ ～2×10 ⁵ Nu can be expressed as:

wherein s is ₁ Is the row spacing of the fork tube bundles, s ₂ Is the interval between the rows of the fork row tube. Re (Re) _f Reynolds number, pr, of the flow of the flue gas _f Is the Plandter number, pr of the flue gas _w Is the prandtl number of the flue gas with the wall temperature as the characteristic temperature.

In engineering calculation, if the logarithmic average temperature difference given by convection heat exchange is designed to be delta t _m Then, according to the heat transfer equation, the overall heat exchange amount Φ is:

Φ＝kAΔt _m

wherein k is the comprehensive heat exchange coefficient, and A is the heat exchange area.

From the above analysis, the heat exchange area of the circular arc rhombus tube is larger than that of the circular tube, so that the whole heat exchange amount of the device can be increased by adopting the circular arc rhombus tube as the cooling water tube 102 a.

The adoption of the circular arc diamond-shaped pipe can also affect the flow resistance of the flue gas. The round tube and the preferred circular arc rhombus tube of the present application are subjected to comparative analysis.

The flow resistance relation of the circular tube fork rows is as follows:

the flow resistance is a function of fluid velocity, tube bundle arrangement, fluid properties and number of rows when gas flows around the tube bundle, and the correlation is that

Wherein χ is the correction coefficient of the fork tube bundle and is the pipeline parameter s ₁ 、s ₂ Relation of N _L For the line number, f is the resistance coefficient, and f is a value that varies depending on the flow reynolds number Re.

The relation of flow resistance and resistance of the circular arc rhombus tube fork row is as follows:

the long side of the circular arc diamond-shaped pipe is l ₁ Short side is l ₂ And designing a correction coefficient epsilon, wherein the relation of the flow resistance of the circular arc rhombic tube fork rows is as follows:

wherein ε (l) ₁ ，l ₂ ) For correction factors relating to the side length of circular-arc diamond-shaped tubes, as compared to tube bundles of circular-tube rows, ε (l) ₁ ，l ₂ ) Greater than 1. The other parameters have the same meaning as the above formula.

The edges of the circular arc diamond are similar to the streamline property of the airfoil, compared with a circular tube, the separation area of the flowing boundary layer at the tail part of the circular arc diamond is reduced, the reverse pressure gradient is reduced, and the overall resistance is reduced.

As shown in fig. 3A-3B, the box structure of the purifying apparatus of the present application preferably adopts a rectangular box structure, specifically: the box body 101 comprises an upper box plate 1011, a lower box plate 1012, a front box plate 1013 and a rear box plate 1014, wherein the upper box plate 1011, the front box plate 1013, the lower box plate 1012 and the rear box plate 1014 are sequentially connected in a sealing manner; the openings on the left side and the right side of the box body 101 form a flue gas air inlet 4 and a flue gas air outlet 5 for flue gas circulation, and a flue gas channel from the flue gas air inlet 4 to the flue gas air outlet 5; the flue gas channel is used for accommodating cooling water tube bundles 102 which are vertically arranged and are arranged in an array; the upper case plate 1011 and the lower case plate 1012 are provided with a plurality of water pipe mounting holes 102b for sealing and assembling the end parts of the cooling water pipes 102 a; a space for assembling an end fitting assembly communicating the upper and lower ends of the cooling water tube bundle 102 is left above the upper box plate 1011 and below the lower box plate 1012. However, the present application does not limit the case structure to be rectangular, and those skilled in the art should understand that in some special application scenarios, the case structure may be appropriately deformed, for example, an arc-shaped case structure with a certain radian, for example, a trapezoid case structure with a different size of the flue gas inlet and the flue gas outlet, etc.

In the present application, the upper and lower ends of the cooling water tube bundle 102 are mounted on the upper header plate 1011 and the lower header plate 1012. Considering that the purification apparatus needs to operate for a long time, the low-temperature condensation module 1 is subjected to frequent vibration when being operated by the flue gas impact cooling water pipe 102a, so that the problem of flue gas leakage at the joint of the upper end part and the lower end part of the cooling water pipe 102a and the upper box plate and the lower box plate is easily caused. In order to solve this problem, as shown in fig. 9A to 10B, the present application proposes a sealing installation structure of a cooling water pipe and a box plate, the sealing installation structure including an installation base 20 and a cooling water pipe body 1020; wherein,,

the mounting foundation 20 is provided with a water pipe mounting hole 102b, and the hole wall of the water pipe mounting hole 102b is provided with an annular groove 17 along the circumferential direction; in the present embodiment, the mounting base 20 is an upper case plate 1011 and a lower case plate 1012 of the case 101.

The end of the cooling water pipe body 1020 is arranged in the water pipe mounting hole 102b, the part of the cooling water pipe body 1020 corresponding to the annular groove 17 is provided with an annular bulge 18, and the annular bulge 18 is embedded in the annular groove 17 in a sealing manner so that the end of the cooling water pipe body 1020 and the water pipe mounting hole 102b form a curved surface seal.

In this embodiment, the cooling water pipe body 1020 has a strip-shaped structure, and the interior thereof is hollow, so that cooling water can flow. The mounting base 20 is an upper deck 1011 or a lower deck 1012 of the present application. In order to improve the tightness between the cooling water pipe body 1020 and the installation base 20 in the prior art, a sealing ring is generally fixed on the installation base 20, the cooling water pipe body 1020 is fixed in the sealing ring, and the tightness at the joint between the cooling water pipe body 1020 and the installation base 20 is improved through the sealing ring.

However, since the outer side of the cooling water pipe body 1020 is still in a straight curved surface structure and the corresponding position of the sealing ring and the mounting base 20 is also in a straight curved surface structure, when the cooling water pipe body 1020 is mounted on the sealing ring and the mounting base 20, the straight curved surface structure still has difficulty in maintaining the sealing performance for a long time, and the sealing effect is still not ideal.

Therefore, to solve this problem, the present embodiment is to provide the water pipe installation hole 102B in the installation base 20 and the annular groove 17 in the water pipe installation hole 102B, as shown in fig. 9B and 10B. The end of the cooling water pipe body 1020 is sleeved in the water pipe mounting hole 102b, so that the cooling water pipe body 1020 and the annular groove 17 are matched, an annular protrusion 18 can be arranged on the outer side of the cooling water pipe body 1020, and the annular protrusion 18 is embedded in the annular groove 17 in a sealing manner, so that a curved surface seal is formed between the annular protrusion 18 and the annular groove 17.

Due to the arrangement of the annular groove 17, the inner surface of the water pipe mounting hole 102b on the mounting base 20 is changed from a straight curved surface structure to a curved surface structure, and the outer surface of the end of the cooling water pipe body 1020 is changed from the straight curved surface structure to the curved surface structure. It can be appreciated that when the cooling water pipe body 1020 is installed in the water pipe installation hole 102b, the connection between the cooling water pipe body 1020 and the water pipe installation hole 102b is also changed from a straight curved surface structure to a curved surface structure, so that the tightness of the connection between the cooling water pipe body 1020 and the water pipe installation hole 102b is improved. And the sealing performance is further improved by adopting an interference fit manner between the annular bulge 18 and the annular groove 17.

The embodiment realizes the technical effect of improving the tightness between the cooling water pipe body 1020 and the installation foundation 20 and preventing the tail gas from leaking from the joint of the cooling water pipe body 1020 and the installation foundation 20, and further solves the problem that the tightness still is difficult to meet the use requirement because the cooling water pipe and the installation foundation 20 are generally sealed only by adopting the sealant 16 or the sealing ring in the related art.

As shown in fig. 9B and 10B, the annular groove 17 in the water pipe mounting hole 102B may be formed by grooving with a special tool, and the width of the cross section of the annular groove 17 may be gradually reduced from inside to outside, so that a small circular arc end structure with a smaller diameter is formed at the outermost end thereof. The configuration of the annular recess 17 is better than a rectangular or other shaped groove configuration, with which the annular projection 18 engages. The annular protrusion 18 on the cooling water pipe body 1020 can be realized by means of expansion pipes, specifically, the cooling water pipe body 1020 can be sleeved in a water pipe mounting hole provided with the annular groove 17, and outward expansion pressure is applied to the part, corresponding to the annular groove 17, of the cooling water pipe body 1020 by a special pipe expansion tool, so that the cooling water pipe body 1020 deforms at the corresponding part to form a first annular protrusion 18 and is extruded and fixed in the annular groove 17.

In order to further improve the sealing performance of the joint between the cooling water pipe body 1020 and the installation foundation 20, the sealing glue 16 is arranged in the annular groove 17, the sealing glue 16 can be coated in the annular groove 17 before the cooling water pipe body 1020 is installed, and after the annular bulge 18 formed by expanding the cooling water pipe body 1020 is embedded in the annular groove 17, the sealing performance is improved under the action of the sealing glue 16.

In order to improve the uniformity of the opening depth of the annular groove 17, the annular groove 17 and the water pipe mounting hole are coaxially arranged.

As shown in fig. 9B and 10B, a rubber gasket 15 is further provided in the annular groove 17, and an annular projection 18 abuts the rubber gasket 15 in the annular groove 17. The rubber gasket 15 is formed to match the shape of the annular groove 17, and the rubber gasket 15 is embedded in the annular groove 17, then the sealant 16 is injected into the annular groove 17, and finally the cooling water pipe body 1020 is sleeved in the water pipe mounting hole 102 b.

The annular groove 17 includes a plurality of grooves circumferentially spaced along the wall of the water pipe mounting hole 102b, and the plurality of grooves have uniform or different depths of extension on the wall of the hole. The contact point of the cooling water pipe body 1020 and the inner wall of the water pipe installation hole 102b can be increased by a plurality of grooves. When the extending depth of the grooves is inconsistent, the sealing performance between different contact points is different, and the groove depth can be adjusted according to the actual tail gas flowing condition, so that the application range is improved.

In order to further improve the sealing property of the joint between the cooling water pipe body 1020 and the installation base 20, a plurality of annular grooves 17 are provided and distributed along the axial direction of the water pipe installation holes 102b, so that multi-stage sealing is formed, and the sealing modes of each stage are the same.

To further improve the sealability, as shown in fig. 10B, the annular grooves 17 in the present embodiment are provided in two, including a first annular groove 171 and a second annular groove 172, the groove opening direction of the first annular groove 171 and the groove opening direction of the second annular groove 172 being inclined in opposite directions in the axial direction of the water pipe installation hole; accordingly, the annular projection 18 includes a first annular projection 18 and a second annular projection 18, the projection directions of the first annular projection 18 and the second annular projection 18 being inclined in opposite directions in the axial direction of the water pipe installation hole.

Specifically, it should be noted that the first annular groove 171 and the second annular groove 172 are sequentially disposed from inside to outside, the groove opening direction of the first annular groove 171 may be inclined toward the inside of the installation base 20, and the groove opening direction of the second annular groove 172 may be inclined toward the outside of the installation base 20, so that the connection between the cooling water pipe body 1020 and the water pipe installation hole 102b is sealed in different directions.

Also, in the present embodiment, the depth of the second annular groove 172 is greater than the depth of the first annular groove 171. By this arrangement, the second annular groove 172 forms a secondary seal with better sealing properties, further improving the sealing properties of the overall joint.

After the annular groove 17 is matched with the annular groove 17 positioned in the water pipe mounting hole 102b, the sealing performance of the part in the water pipe mounting hole 102b is effectively improved, but the sealing performance of the part at the two ends of the water pipe mounting hole 102b still has a straight curved surface structure. Therefore, as shown in fig. 10B, in this embodiment, two annular clamping protrusions 19 are further disposed on the cooling water pipe body 1020, the two annular clamping protrusions 19 are located on the inner side and the outer side of the installation base 20, that is, on two ends of the water pipe installation hole 102B, and opposite surfaces of the two annular clamping protrusions 19 respectively abut against the inner side surface and the outer side surface of the installation base 20. The first seal and the last seal at the joint of the cooling water pipe body 1020 and the installation base 20 are respectively formed by the two annular clamping protrusions 19, so that the tightness can be further enhanced, and meanwhile, the connection strength of the cooling water pipe body 1020 and the installation base 20 can be improved.

As a preferred embodiment of the present application, the water pipe mounting hole 102b is a circular arc diamond hole with the same cross-sectional profile and size as those of the end of the circular arc diamond pipe, the annular groove 17 includes a plurality of grooves, which are sequentially arranged on the four straight sides 1020c and the two large circular arc ends 1020b of the circular arc diamond hole, and correspondingly, the annular protrusion 18 includes a plurality of protrusions, which are arranged on the four straight sides 1020c and the two large circular arc ends 1020b of the end of the circular arc diamond pipe, and the plurality of grooves are in sealing fit with the plurality of protrusions, and combine with different embedding depths of the grooves and protrusions, and then are matched with the special-shaped shape of the circular arc diamond, so that the sealing performance at the joint of the cooling water pipe 102a and the mounting base 20 (the upper box board 1011 and the lower box board 1012) can meet the requirement of long-time operation of the purification equipment without smoke leakage.

In this application, the structural form of the end fitting assembly affects the flow form of the cooling water from the cooling water inlet 103a to the cooling water return 104 a. Five embodiments of cryocondensation modules 1 with different end fitting assemblies are presented.

Figures 2C-2E illustrate embodiments of a cryocondensation module with a round tube elbow as an end fitting. As can be seen from the figure, the end joint assembly is a round tube elbow assembly that connects the ends of two adjacent cooling water tubes 102a in sequence. Along the direction from the flue gas air inlet 4 to the flue gas air outlet 5, the end parts of the cooling water pipes 102 of two adjacent rows are connected through round pipe elbows 105 positioned on the outer side of the box plate.

In this embodiment, the cooling water circulation pipeline is disposed above the box 101 of the low-temperature condensation module 1, and in other embodiments may be disposed below, where a specific position is set according to actual needs. The cooling water circulation pipelines are arranged in two groups, the cooling water pipe bundle 102 is divided into a front cooling water pipe area 24 and a rear cooling water pipe area 24 along the direction from the flue gas air inlet 4 to the outlet in the box body 101, and the cooling water inlet pipeline 103 and the cooling water return pipeline 104 of the two groups of cooling water circulation pipelines are respectively communicated with the water inlet cooling water pipeline and the water outlet cooling water pipeline of the front cooling water pipe area 24 and the rear cooling water pipe area 24. Because the flue gas temperature near the flue gas air inlet 4 is high, the cooling temperature of the cooling water pipe 102a near the flue gas air inlet 4 needs to be greatly reduced, and the flue gas temperature near the flue gas air outlet 5 is less in the cooling temperature reducing requirement on the cooling water pipe 102a near the flue gas air outlet 5 on the basis that the cooling water pipe 102a at the front side is reduced, in the embodiment, the cooling water flow in the cooling water pipe area 24 near the outlet side can be reduced, and the cooling water consumption can be saved. Specifically, the manner of reducing the flow rate of the cooling water near the outlet side cooling water pipe region 24 may be to reduce the pipe diameter (i.e., the cross-sectional area size) of the cooling water pipe 102a or to reduce the inflow rate of the cooling water inlet pipe 103. In other embodiments, the flow rate of the cooling water in the outlet side cooling water pipe 24 may not be reduced, i.e., the amount of cooling water in the inlet side cooling water pipe 24 is equal to the flow rate in the outlet side cooling water pipe 24. In addition, the number of the cooling water areas 24 is not limited in the present application, and may be three, four, five, etc. in other embodiments according to actual needs.

In the above embodiment, since the number of the cooling water pipes 102 is large, the same number of the round pipe bends 105 is required, and the large number of round pipe bends 105 can cause kinetic energy resistance loss of the cooling water at the turning point, which reduces the heat exchange efficiency of the low-temperature condensing module 1. Meanwhile, in order to reduce the overall volume of the low-temperature condensation module 1, the setting interval of the cooling water pipes 102 is smaller, the round pipe elbow 105 is required to realize end connection of the two cooling water pipes 102, the radian of the round pipe elbow 105 is smaller, and the processing difficulty is larger.

To address the problems of greater kinetic energy resistance loss of the cooling water at the tube elbow 105 and greater difficulty in machining the tube elbow 105, an embodiment utilizing a water tank instead of the tube elbow 105 as an end fitting assembly is shown in fig. 3A-6D.

Specifically, the end joint assembly includes an upper end joint assembly 25 and a lower end joint assembly 26, where the upper end joint assembly 25 and the lower end joint assembly 25 are alternately disposed above and below the cooling water tube bundle 102 in sequence along the flue gas flowing direction, and each end joint penetrates through the ends of the multiple rows of cooling water tubes 102a to form parallel pipelines in the cooling water tube bundle 102 for at least two parallel water flows flowing in the same direction. Specifically, the upper end assembly 25 is an upper water tank 11, the lower end assembly 26 is a lower water tank 12, the upper water tank 11 includes a plurality of upper water tank sections 111 as end joints arranged above the cooling water tube bundle 102 along the flue gas circulation direction, the lower water tank 12 includes a plurality of lower water tank sections 121 as end joints arranged below the cooling water tube bundle 102 along the flue gas circulation direction, and the plurality of rows of cooling water tubes 102a penetrating each water tank section include water inlet pipelines and water outlet pipelines arranged side by side along the flue gas circulation direction, and the rows of the water inlet pipelines and the water outlet pipelines are the same.

Fig. 3A-3D show embodiments in which cooling water circulates along the grouped water pipes. In the present embodiment, a water tank is provided outside the upper and lower box plates of the box 101 instead of the round pipe elbow 105 in embodiment 1 to achieve communication of the end portions of the cooling water pipe 102. An upper tank 11 is arranged above the upper tank plate 1011, a lower tank 12 is arranged below the lower tank plate 1012, a plurality of partitions are arranged in the upper tank 11 to divide the upper tank 11 into 1 st to nth upper tank sections 111, a plurality of partitions are arranged in the lower tank 12 to divide the lower tank 12 into 1 st to nth lower tank sections 121, and each upper tank section 111 or lower tank section 121 is correspondingly communicated with the end parts of at least two rows of cooling water pipes 102. The cooling water inlet pipeline 103 is communicated with the 1 st lower water tank subsection 121 close to the flue gas air inlet 4, the cooling water return pipeline 104 is communicated with the N th upper water tank subsection 111 farthest from the flue gas air inlet 4, and the 2 nd to N lower water tank subsections 121 of the lower water tank 121 are respectively staggered with the 1 st to N-1 st upper water tank subsection 111 of the upper water tank 111. Specifically, as shown in fig. 3A, the cooling water enters the 1 st lower water tank subsection 121 of the lower water tank from the cooling water inlet, the 1 st lower water tank subsection 121 corresponds to the 4 rows of cooling water pipes 102a, the cooling water flows upwards along the 4 rows of cooling water pipes 102a and flows out of the first 4 rows of cooling water pipes 102a of the 1 st upper water tank subsection 111 under the pressure drive of the water pump 9, the 1 st upper water tank subsection 111 corresponds to the 8 rows of cooling water pipes 102a, the cooling water flowing in from the first 4 rows flows downwards into the cooling water pipes 102a of the last 4 rows after being diverted by the 1 st upper water tank subsection 111, the 2 nd lower water tank subsection 121 corresponds to the 8 rows of cooling water pipes 102a, the cooling water flowing down through the 1 st upper water tank subsection 111 flows upwards from the last 4 rows of cooling water pipes 102a after diverted by the 2 nd lower water tank subsection 121, the 2 nd to N-1 upper water tank subsection 111 and the 3 rd to N lower water tank subsection 121 are sequentially arranged according to the above, the cooling water flows out of the upper water tank subsection 11 from the upper water tank subsection 111 and the upper water tank subsection 11 sequentially flows out of the upper water tank subsection 11.

According to the embodiment, the circular pipe elbow in the embodiment is replaced by the water tank subsection, so that the cooling water is changed into multi-path steering from the 1-path steering in the embodiment, the steering times are reduced, the resistance loss of the cooling water in turning is also reduced, and the heat exchange efficiency of the cooling water pipe bundle is improved; and secondly, compared with a round pipe elbow, the water tank also reduces the processing difficulty and the processing cost.

For the water flow resistance, the water flow resistance is formed by the on-way resistance of the straight pipe section and the local resistance of the flow elbow, the joint, the mutation and the like because the water flow resistance flows in the pipe.

The on-way resistance is expressed as:

wherein lambda is the coefficient of resistance along the way, l is the length of the tube, d is the inner diameter of the tube, V _i G is gravitational acceleration, which is the flow rate in the pipe;

the local resistance is expressed as:

where ζ is the local drag coefficient and N is the number of local drag components.

From the above two formulas, the longer the tube length l, the h _f The larger N is, the larger H is _ξ The larger. When the elbow is changed into the integral water tank, the distance from one side to the other side of the water flow is greatly reduced, and the flow resistance only consists of a small section of on-way resistance and 2 local resistances. Because the tube bundle array changes from a series arrangement to a parallel arrangement, the flow resistance of each channel is the same and is greatly reduced.

It should be noted that the water tank subsection in the present application can also be set up independently, that is, the water tank subsection is independent molding, and the water tank subsection is fixed through fixed knot constructs with the water tank subsection between. In addition, the shape of the water tank subsection is not limited to the rectangular shape in the embodiment of the application, and in other embodiments, in order to further reduce the resistance loss of the cooling water steering, the outer side right angle of the rectangular water tank subsection may be processed into a round angle.

Considering that the flue gas temperature near the flue gas air inlet 4 is high, the cooling water consumption is large, the flue gas temperature far away from the flue gas air inlet 4 is low, the cooling water consumption is small, in order to further reduce the cooling water consumption, as the best embodiment of the low-temperature condensation module 1 of the application, fig. 4A-4C show embodiments in which the cooling water in each region circulates along the grouping water pipe and the cooling water consumption is adjustable, on the basis of the embodiment in which the cooling water circulates along the grouping water pipe, the cooling water pipe 102 is divided into the 1 st to the nth regions, the cooling water pipe 102 in each region is correspondingly provided with a group of cooling water inlets 103a and cooling water backwater openings 104A, and a plurality of cooling water regions are isolated from each other and are independently cooled. The utility model provides a get through the inflow that reduces the cooling water district in keeping away from flue gas air intake 4 side and reach the purpose of practicing thrift the whole water consumption of low temperature condensation module 1. Specifically, in the present embodiment, the cooling water pipe 102 is divided into three sections, and the amounts of cooling water set to the 1 st to 3 rd sections are sequentially reduced. In other embodiments, the cooling water pipe 102 may be set to two areas, four areas, five areas, and so on according to actual needs, and accordingly, the cooling water inlet 103a and the cooling water return port 104a are also set to two groups, four groups, five groups, and so on.

Further, in this embodiment of the application, the mode of reducing in proper order and keeping away from flue gas air intake 4 side cooling water quantity is: by providing the flow regulating valve 1031 at the cooling water inlet 103a of the 1 st lower water tank section 121 of each cooling water pipe section, the amount of cooling water in each cooling water pipe section can be regulated by regulating the inlet area of the flow regulating valve 1031. Specifically, a water diversion pipe 1033 communicating with the lower tank section 121 is provided in the 1 st lower tank section 121 of each cooling water pipe section, and a flow rate regulating valve 1031 is provided in the water diversion pipe 1033.

Still further, a cooling water inlet manifold 1032 is disposed below the lower water tank 12 in each cooling water pipe area and is respectively communicated with each water diversion pipe 1033, cooling water enters from the cooling water inlet manifold 1032, the cooling water inlet manifold 1032 diverts cooling water into each water diversion pipe 1033 according to the opening size of each flow regulating valve 1031, in the embodiment of the application, in order to save the overall water consumption of the cooling water, the opening of the flow regulating valve 1031 far away from the flue gas air inlet 4 is sequentially reduced, so that the cooling water amount of the cooling water flowing from the cooling water inlet manifold to the water diversion pipe 1033 far away from the flue gas air inlet 4 is sequentially reduced, and the overall consumption of the cooling water is reduced on the basis of meeting the condensation efficiency of the low-temperature condensation module 1.

As an alternative embodiment of the cryocondensation module 1 of the present application, the upper end component is an upper water tank penetrating through the upper ends of all cooling water pipes, the lower end component is a lower water tank, the lower water tank comprises a plurality of lower water tank sections arranged along the flue gas flowing direction, and each lower water tank section penetrates through a plurality of rows of cooling water pipes; the upper water tank is communicated with a cooling water return port, and each lower water tank is communicated with a cooling water inlet. The cooling water inlet main pipe is communicated with each cooling water inlet through a flow regulating valve. In particular, as shown in fig. 5A-5C, in the through-type embodiment of cooling water adjustment in each area, a plurality of partitions are disposed in the lower water tank 12 to divide the lower water tank 12 into a plurality of lower water tank sections 121, and the number of cooling water pipes 102a corresponding to and communicated with each lower water tank section 121 may be the same or different, and specifically, the arrangement is performed according to actual needs. The upper water tank 11 is provided without a partition plate, and is a water return tank covering and communicating the 1 st to nth rows of cooling water pipes 102.

The cooling water enters from the cooling water inlet manifold 1032, is split into the corresponding lower tank sections 121 by the flow regulating valves 1031 of the respective water splitting pipes 1033, and in this embodiment, each lower tank section 121 is an inlet tank, and the cooling water flows into the upper tank 11 from each section from bottom to top along the cooling water pipe 102a, and finally flows out from the cooling water return port 104a provided at the nth row of cooling water pipes 102 a.

Further, considering that the flue gas temperature near the flue gas air inlet 4 is high, the cooling water consumption is large, the flue gas temperature far away from the flue gas air inlet 4 is low, the cooling water consumption is small, and in order to further reduce the cooling water consumption of the low-temperature condensation module 1 of the embodiment of the application, the cooling water consumption of the subsection far away from the flue gas air inlet 4 side is set to be smaller than the cooling water consumption of the subsection near the flue gas air inlet 4 side, specifically, along the direction from the flue gas air inlet 4 to the outlet, the opening of the flow regulating valve 1031 of the water diversion pipe 1033 of each subsection is sequentially reduced.

As an alternative embodiment of the cryocondensation module 1 of the present application, the upper end assembly 25 is an upper water tank 11 penetrating through the upper end of all the cooling water pipes 102a, the lower end assembly 26 is a lower water tank 12 penetrating through the lower end of all the cooling water pipes 102a, one of the upper water tank 11 and the lower water tank 12 is communicated with the cooling water inlet 103a, and the other is communicated with the cooling water return port 104a. In the embodiment that the cooling water in each region circulates along the grouping water pipe and the cooling water quantity is adjustable, as shown in fig. 6A-6D, the upper water tank 11 is arranged without a partition, and the upper water tank 11 is a water return tank communicated with the cooling water return port 104 a; the lower water tank 12 is arranged without a partition plate, and the lower water tank 12 is a water inlet tank communicated with the cooling water inlet 103 a. The upper tank 11 and the lower tank 12 each cover and communicate with the 1 st to N th rows of cooling water pipes 102a. The cooling water enters the lower water tank 12 from the cooling water inlet 103a, then flows from bottom to top to the upper water tank 11 from each row of cooling water, and finally flows out from the cooling water return port 104a provided at the nth row of cooling water pipes 102a.

Further, considering that the flue gas temperature near the flue gas air inlet 4 is high, the cooling water consumption is large, the flue gas temperature far away from the flue gas air inlet 4 is low, the cooling water consumption is small, in order to further reduce the cooling water consumption of the low-temperature condensation module 1, in the embodiment of the application, along the direction from the flue gas air inlet 4 to the outlet, the opening size of the lower water tank 12 communicated with each row of cooling water pipes 102a is sequentially reduced, so that the cooling water consumption of each row of cooling water pipes 102a from the flue gas air inlet 4 to the outlet is sequentially reduced, and the whole water consumption of the low-temperature condensation module 1 is realized.

In addition, as shown in fig. 3C, 4C, 5C, and 6C, the cooling water inlet 103a and the cooling water return port 104a are disposed on opposite sides, so that the running path and the resistance of the cooling water in the channels of each parallel water diversion pipe 1033 are the same, and the same flow rate of the water in each parallel water diversion pipe 1033 and the same cooling efficiency of the corresponding flue gas are ensured.

In addition, in order to ensure the overall appearance aesthetic degree of the purifying device, the outer side of the lower box plate 1012 is additionally provided with a closed grille cover for shielding the exposed water tank or elbow 105 at the bottom of the box body 101.

The embodiment of the application also provides a low-temperature condensation module 1 with a demisting water collecting baffle structure.

The flue gas velocity of the cement kiln flue gas emission is high, the time of heat exchange condensation through the low-temperature condensation module 1 is short, and if the ammonia-containing condensed water in the flue gas does not completely flow to the bottom of the device along the cooling water pipe 102a for outward discharge, the ammonia-containing condensed water can be discharged from the flue gas air outlet 5 to the outside to cause pollution. Therefore, the embodiment further collects the moisture in the flue gas cooled to the dew point by providing the defogging water collecting baffle 13 at the flue gas outlet.

In order to further guarantee that the ammonia-containing condensate water can not discharge from the flue gas air outlet 5 to the outside, in this embodiment, as shown in fig. 3A, set up the defogging water-collecting baffle 13 of a plurality of vertical settings in flue gas air outlet 5 department, the face of defogging water-collecting baffle 13 is the folded plate that has a plurality of dog-ear, can pass through defogging water-collecting baffle 13 after the flue gas is discharged from last row condenser tube 102a, under the effect of folded plate's tortuous face, the speed of flue gas can drop, the condensate water in the flue gas can bond to defogging water-collecting baffle 13's surface and leave the bottom of device along defogging water-collecting baffle 13 surface. The condensed water in the flue gas can be prevented from being discharged to the outside from the flue gas port by the arrangement of the demisting and water collecting water baffle 13.

Further, the folding plate at least comprises a pair of folding angles which are bent in opposite directions. By the mode, the travel of the smoke traveling on the folding plate can be increased, and the collection of moisture mixed in the smoke is facilitated.

As a preferred embodiment, a section of the folded panel close to the flue gas outlet is a straight panel section, which is used for guiding the flue gas to flow along the demisting and water collecting water baffle 13. Further, at least part of the defogging water-collecting baffle 13 is formed with oblong holes which are vertically extended and serve as drainage holes along the surface of the defogging water-collecting baffle 13, and condensed water adhered to the surface of the defogging water-collecting baffle 13 can flow to the bottom of the device along the oblong holes for external drainage. Preferably, the oblong hole extends from the upper end to the bottom end of the flap panel.

In order to further improve the safety of flue gas emission, a steel wire mesh 14 is arranged on the outer side of the demisting and water collecting water baffle 13 to block condensed water in flue gas.

In conclusion, the self-sustaining one-step purification equipment provided by the application is applied to the flue gas purification treatment scenes such as cement kilns, power plants or coal yards, and can effectively reduce escaped ammonia and SO in discharged flue gas ₂ 、NOx、CO ₂ Is contained in the dust-collecting container.

In one embodiment of the purification device, when the flue gas wind temperature of the flue gas wind inlet is 105 ℃, the moisture content of the flue gas is 9.5%, and the escaped ammonia is 20mg/m ³ 、SO ₂ Content 15mg/m ³ NOx content 38mg/m ³ 、CO ₂ Concentration 20.5%, dust content 6mg/m ³ When the temperature of the cooling water inlet water is 28 ℃,

(1) The air temperature of the flue gas air outlet is 60 ℃, the moisture content of the flue gas is 6.5%, and the escaped ammonia is 6mg/m ³ 、SO ₂ Content 5mg/m ³ NOx content 34mg/m ³ 、CO ₂ Concentration 18.5%, dust content 3mg/m ³ The cooling water outlet water temperature was 46 ℃.

(2) When the cooling water quantity in the low-temperature condensation module is increased to enable the air temperature of the flue gas outlet of the purification equipment to be 50 ℃, the water content of the flue gas is 5.0%, and the escaped ammonia is 3mg/m ³ 、SO ₂ Content 2mg/m ³ NOx content 32mg/m ³ 、CO ₂ Concentration content 17.5%, dust content 2mg/m ³ The cooling water outlet water temperature was 41 ℃.

In another embodiment of the purification device, when the flue gas wind temperature of the flue gas wind inlet is 150 ℃, the water content of the flue gas is 7.5%, and the escaped ammonia is 80mg/m ³ 、SO ₂ The content is 150mg/m ³ NOx content 40mg/m ³ 、CO ₂ Concentration 21.0%, dust content 5mg/m ³ When the temperature of the cooling water inlet water is 28 ℃,

the air temperature of the air outlet of the flue gas is 65 ℃, the water content of the flue gas is 6.0%, and the ammonia escaping is 15mg/m ³ 、SO ₂ Content 42mg/m ³ NOx content 36mg/m ³ 、CO ₂ Concentration 19.0%, dust content 3mg/m ³ At this time, the cooling water outlet water temperature was 65 ℃.

To the condition that flue gas air intake wind temperature is higher or flue gas moisture content is lower or flue gas air intake escape ammonia content is higher, in order to further improve escape ammonia purification efficiency, as shown in fig. 1B and fig. 2A, this application embodiment provides a self-sustaining one-step method clarification plant with atomizer, atomizer 3 is used for spouting atomizing water towards flue gas air intake 4 department, atomizer 3's setting position is flue gas air intake 4 departments, more specifically, atomizer 4 sets up the trapezoid joint department of the flue gas discharge port of cement kiln and clarification plant's flue gas air intake 4 hookup location, but it is to be noted that atomizer 3's setting position is not limited to flue gas air intake 4 department, for example in some other embodiments, atomizer 3 can also set up in cement kiln flue gas discharge port department or more preceding position. The water content in the flue gas can be increased by spraying atomized water to the flue gas air inlet. The specific principle is as follows: because the flue gas temperature is high, the atomized water can be evaporated into vapor by the high temperature of the flue gas after entering the flue gas, thereby increasing the vapor content in the flue gas, and when the vapor content in the flue gas is lower, the vapor content in the flue gas can be improved by spraying the atomized water through the atomizing device 3, so that the deamination efficiency is improved. In addition, the agent (the agent which is helpful for deamination, denitration and desulfurization) can be added into the atomized water, and the agent can be fully contacted with the flue gas by means of atomized water, so that the cleanliness of the discharged flue gas is further improved. Finally, the atomized water can cool the flue gas, and the working pressure of the subsequent low-temperature condensation module 1 is reduced.

For the flue gas air temperature of the flue gas air inlet is more than 120 ℃, or the moisture content of the flue gas at the flue gas air inlet is less than 8%, or the escaped ammonia at the flue gas air inlet is 100mg/m ³ And starting the atomizing device.

When the flue gas air inlet is SO ₂ The content is more than 100mg/m ³ Starting the atomizing device, and adding a desulfurizing agent into the atomized water; and/or when the Nox content at the flue gas inlet is greater than 50mg/m ³ And when the atomization device is started, and a denitration agent is added into the atomized water.

In one embodiment of the purification device, when the flue gas wind temperature of the flue gas wind inlet is 150 ℃, the water content of the flue gas is 7.5%, and the escaped ammonia is 80mg/m ³ 、SO ₂ The content is 150mg/m ³ NOx content 40mg/m ³ 、CO ₂ Concentration 21.0%, dust content 5mg/m ³ When the temperature of the cooling water inlet water is 28 ℃,

starting the atomizing device 3, adjusting the water content of the inlet flue gas to 9.0%, reducing the inlet air temperature to 128 ℃, and increasing the cooling water quantity to enable the flue gas of the purifying equipment to be dischargedWhen the mouth wind temperature is 55 ℃, the water content of the flue gas is 5.0%, and the escaped ammonia is 4mg/m ³ 、SO ₂ 18mg/m ³ NOx content 34mg/m ³ 、CO ₂ Concentration 17.8%, dust content 1.5mg/m ³ At this time, the cooling water outlet water temperature was 48 ℃.

As a preferred embodiment of the present application, the purification apparatus further comprises a spray cleaning device 2. Because the flue gas contains particles, the cooling water pipe 102 of the low-temperature condensation module 1 is contacted with the flue gas for a long time to cause the particles to be difficult to remove on the surface of the cooling water pipe fitting, and the heat exchange efficiency of the low-temperature condensation module 1 (namely the cooling efficiency of the flue gas) is reduced, therefore, as shown in fig. 1B, the spraying device 2 sprays water to the joint of the flue gas air outlet 5 of the cement kiln and the deamination device, the spraying water is columnar and sprayed to the flue gas opening, and the rapidly circulated flue gas blown out along with the flue gas air outlet 5 of the cement kiln is flushed onto the surface of the cooling water pipe fitting, so that the particles adhered on the surface of the pipe fitting are flushed away.

The embodiment of the application also provides a modularized purifying device, which is modularized in the embodiment, and comprises a plurality of purifying device sub-modules, wherein the plurality of purifying device sub-modules can be arranged in parallel and/or in series along. The sub-modules are standardized, and the number of the sub-modules and the connection mode among the sub-modules are determined according to requirements and field arrangement.

In particular, in one embodiment of the present application, one piece of decontamination equipment may be made into two decontamination equipment sub-modules that are placed side-by-side together at the time of field installation. Further, in order to ensure connection reliability between the two sub-modules, the two purification apparatus sub-modules may be connected by bolting, welding.

In addition, the submodules can be placed at intervals, the flue gas outlet 5 of the cement kiln is branched to each branched pipeline to enter each submodule respectively, and finally, the flue gas and the flue gas of all the submodules are collected and discharged.

Because the submodule is of standardized design, when the actual application scene exceeds the purifying capacity of the submodule, a plurality of submodules can be connected in series along the smoke flow direction for use.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modifications, equivalent substitutions, improvements, or the like, which are within the spirit and principles of the present application, are intended to be included within the scope of the present application.

Claims

1. The cooling water tube bundle is characterized by being used for self-supporting one-step purification equipment, wherein the self-supporting one-step purification equipment comprises a box body, and the box body is provided with a flue gas air inlet, a flue gas air outlet and a flue gas channel from the flue gas air inlet to the flue gas air outlet;

2. The cooling water tube bundle of claim 1, wherein three cooling water tubes adjacent to two adjacent rows of the cooling water tubes form a triangular arrangement of cooling water tube units, and the arrangement size range of the cooling water tube units is as follows:

C＝1.8A～2A；

D＝0.8B～1.5B；

3. The cooling water tube bundle of any one of claims 1-2, wherein the cooling water tube is a circular arc diamond shaped cooling water tube comprising: the cross section of the cooling water pipe body is in an arc diamond shape, two ends of a short diagonal line of the cooling water pipe body are respectively large arc ends, and two ends of a long diagonal line of the cooling water pipe body are respectively small arc ends; the large arc ends at the two ends of the short diagonal are respectively connected with the small arc ends at the two ends of the long diagonal through straight edges, and the straight edges are tangent to the arc lines of the large arc ends and the small arc ends.

4. A cooling water tube bundle as set forth in claim 3 wherein said large arc ends at both ends of the short diagonal are disposed concentrically.

5. A cooling water tube bundle as set forth in claim 3 wherein the midpoint connection of said large arc ends at both ends of the short diagonal is perpendicular to the connection of said small arc ends at both ends of the long diagonal.

6. The cooling water tube bundle of claim 3, wherein the large arc end and the small arc end each include a fillet and a bullnose.

7. The cooling water tube bundle of claim 6, wherein the dimensions of the cross section of the cooling water tube body are as follows:

A＝20～100mm；

B＝A～2A；

R ₁ ＝1/2×A；

R ₂ ＝R ₁ -t；

r ₁ ＝6～1/2×R ₁ ；

r ₂ ＝r ₁ -t；

wherein A is the short diagonal length of the cooling water pipe body; b is the length of a long diagonal line of the cooling water pipe body; r is R ₁ The outer diameter of the large arc end; r is R ₂ The inner diameter of the large arc end is; t is the wall thickness of the cooling water pipe body; r is (r) ₁ The outer diameter of the small arc end is; r is (r) ₂ Is the inner diameter dimension of the small arc end.

8. The cooling water tube bundle according to claim 3, further comprising an upper joint and a lower joint provided at both ends of the cooling water tube body, respectively; the upper connector and the lower connector have the same structure and comprise plugs and connectors, the plugs are fixed at two ends of the cooling water pipe body in a sealing mode, the first ends of the connectors are fixed on the plugs in a sealing mode and are communicated with the inside of the cooling water pipe body, and the second ends of the connectors extend out of the plugs; the cross section of the plug is set to be in the shape of an arc diamond which is the same as the cross section of the cooling water pipe body, and a joint mounting hole is formed in the plug along the axial direction of the plug; the first end of the connector is sealingly secured within the connector mounting bore.

9. A self-contained one-step purification apparatus for deaminating flue gas containing water vapor, ammonia gas and acidic contaminants, the self-contained one-step purification apparatus comprising:

the low-temperature condensation module is arranged in the flue gas purification channel and comprises the cooling water tube bundle of any one of claims 1-8, the low-temperature condensation module cools and condenses the flue gas entering the flue gas purification channel from the flue gas air inlet, the water vapor is condensed into condensed water, the ammonia gas and the acidic pollutants are dissolved in the condensed water, and an acid-base neutralization reaction occurs in the condensed water to generate salt which is easy to dissolve in the non-volatile property of the condensed water.