CN117771906A - Flue gas deacidification tower and flue gas deacidification method - Google Patents
Flue gas deacidification tower and flue gas deacidification method Download PDFInfo
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- CN117771906A CN117771906A CN202311797334.1A CN202311797334A CN117771906A CN 117771906 A CN117771906 A CN 117771906A CN 202311797334 A CN202311797334 A CN 202311797334A CN 117771906 A CN117771906 A CN 117771906A
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- flue gas
- deacidification
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 241
- 239000003546 flue gas Substances 0.000 title claims abstract description 241
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000007921 spray Substances 0.000 claims abstract description 46
- 239000012530 fluid Substances 0.000 claims abstract description 35
- 239000002253 acid Substances 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 19
- 239000000428 dust Substances 0.000 claims description 25
- 239000000523 sample Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 16
- 239000000779 smoke Substances 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 8
- 238000009529 body temperature measurement Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 3
- 230000003472 neutralizing effect Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000001035 drying Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000002956 ash Substances 0.000 description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000000243 solution Substances 0.000 description 11
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 239000003814 drug Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000004056 waste incineration Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
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- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The embodiment of the application discloses a flue gas deacidification tower and a flue gas deacidification method, wherein the flue gas deacidification tower comprises a deacidification tower body, a two-fluid nozzle, an emergency spray gun and a flue gas distributor, in the use process, flue gas generated after incineration can be supplied to a flue gas inlet part, and then the flue gas distributor can regulate and control the distribution direction and the conveying uniformity of the flue gas, so that the flue gas is supplied into the tower body, and cooling water can be sprayed through the two-fluid nozzle in the flue gas supply process; and when the initial temperature of flue gas is higher or the acid medium content in the flue gas is too high, can open emergent spray gun, can export alkaline medium through emergent spray gun, can cool down to the flue gas, can neutralize the acid medium in the flue gas simultaneously, based on this through the flue gas deacidification tower that this embodiment provided of this application, can be according to county small-size msw incineration system characteristics, combine together dry process and semi-dry deacidification technology, reduce equipment cost and operation degree of difficulty.
Description
Technical Field
The embodiment of the application relates to the technical field of environmental protection equipment, in particular to a flue gas deacidification tower and a flue gas deacidification method.
Background
In the technical field of environmental protection equipment, garbage incineration projects with treatment scales of 200t/d and smaller are increased year by year, but the small garbage incineration projects are uneconomical in scale and difficult to guarantee in project income. Therefore, the most widely applied rotary spray semi-dry deacidification process is not suitable for miniaturized waste incineration projects due to the problems of higher equipment investment, higher maintenance and overhaul difficulty and the like, and the flue gas deacidification process is optimized and simplified under the condition that the flue gas emission of each small waste incineration project is ensured to reach the standard, so that the actual requirements of small incineration facilities can be met.
The dry deacidification process has less equipment, and can effectively reduce equipment investment; the system consists of a cooling tower and an alkaline material spraying device, has simple flow, can reduce equipment failure rate and reduce overhaul and maintenance workload. However, the dry deacidification efficiency is low, so that the deacidification capacity adjustment range is small, and when the flue gas amount and the flue gas components are greatly fluctuated, the flue gas emission acid gas content is at an excessive risk, and an emergency treatment system is required to be arranged.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, a first aspect of the invention provides a flue gas deacidification tower.
In a second aspect, the invention provides a flue gas deacidification process.
In view of this, according to a first aspect of embodiments of the present application, there is provided a flue gas deacidification tower, including:
the deacidification tower comprises a deacidification tower body and a flue gas inlet part arranged at the top of the tower body, wherein the flue gas inlet part is communicated to the tower body;
the double-fluid nozzle is arranged on the flue gas inlet part and is communicated into the tower body for outputting a cooling medium;
the emergency spray gun is communicated with the tower body and used for outputting alkaline medium;
and the smoke distributor is arranged in the tower body and used for guiding the input smoke.
In one possible embodiment of the present invention,
the emergency spray guns are four or more, and are obliquely arranged.
In a possible embodiment, the flue gas distributor comprises:
the cross section of the guide plates is arc-shaped, and the whole formed by the guide plates is obliquely arranged relative to the tower body.
In one possible embodiment, the flue gas deacidification tower further comprises:
the first temperature measurement probe is connected to the smoke inlet part;
the second temperature measuring probe is connected to the middle part of the tower body;
the first manhole is arranged on the smoke inlet part;
and the second manhole is arranged on the tower body.
In one possible embodiment, the flue gas deacidification tower further comprises:
the flue gas outlet is communicated with the side wall of the tower body;
the ash outlet is communicated with the bottom of the tower body;
the deacidification tower body is arranged on the bracket.
In one possible embodiment, the flue gas deacidification tower further comprises:
the cloth bag dust collector is communicated with the flue gas outlet through the connecting pipe;
and the purifying nozzle is communicated with the connecting pipe.
In one possible embodiment, the flue gas deacidification tower further comprises:
the ash discharging valve is used for controlling the opening and closing of the ash outlet;
and the crushing part is arranged opposite to the ash outlet and used for crushing caking dust.
According to a second aspect of the embodiments of the present application, a flue gas deacidification method is provided, and is applied to the flue gas deacidification tower according to any one of the above technical schemes, where the flue gas deacidification method includes:
controlling the flue gas to enter the tower body through the flue gas inlet part;
acquiring concentration information of acid gas in the flue gas;
opening the emergency spray gun and the two-fluid nozzle if the concentration information is greater than a first threshold;
and in the case that the concentration information is smaller than or equal to a first threshold value, only the two-fluid nozzle is opened.
In one possible embodiment, the flue gas deacidification method further comprises:
acquiring flue gas temperature information of the inner middle part of the deacidification tower body;
opening the emergency spray gun and the two-fluid nozzle if the concentration information is greater than a second threshold;
and opening the two-fluid nozzle when the concentration information is less than or equal to a second threshold value.
In one possible embodiment, the flue gas deacidification method further comprises:
and responding to the purifying instruction, controlling the purifying nozzle to spray alkaline powder, neutralizing acid gas in the flue gas by the alkaline powder, and forming a protective film in the bag-type dust collector.
Compared with the prior art, the invention at least comprises the following beneficial effects:
the flue gas deacidification tower provided by the embodiment of the application comprises a deacidification tower body, a two-fluid nozzle, an emergency spray gun and a flue gas distributor, wherein in the use process, flue gas generated after incineration can be supplied to a flue gas inlet part, and then the flue gas distributor can regulate and control the distribution direction and the conveying uniformity of the flue gas, so that the flue gas is supplied into the tower body, and in the flue gas supply process, cooling water can be sprayed through the two-fluid spray gun, on one hand, the temperature of the flue gas is reduced; on the other hand, dust in the flue gas is captured, then the flue gas can be supplied into a bag-type dust collector for secondary filtration, alkaline powder and the flue gas can be conveyed for neutralization reaction in the secondary process, and the deacidification of the flue gas can be completed based on the alkaline powder and the flue gas; and when the initial temperature of flue gas is higher or the acid medium content in the flue gas is too high, can open emergent spray gun, can export alkaline medium through emergent spray gun, can cool down to the flue gas, can neutralize the acid medium in the flue gas simultaneously, based on this through the flue gas deacidification tower that this embodiment provided of this application, can be according to county small-size msw incineration system characteristics, combine together dry process and semi-dry deacidification technology, reduce equipment cost and operation degree of difficulty.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic block diagram of one angle of a flue gas deacidification tower according to one embodiment provided herein;
FIG. 2 is a schematic block diagram of another angle of a flue gas deacidification tower according to an embodiment provided herein;
FIG. 3 is a schematic block diagram of a partial enlargement at the flue gas inlet of a flue gas deacidification tower of an embodiment provided herein;
FIG. 4 is a schematic block diagram of a partial enlargement at a two-fluid nozzle of a flue gas deacidification tower of an embodiment provided herein;
FIG. 5 is a schematic block diagram of a partial enlargement at an emergency lance of a flue gas deacidification tower of an embodiment provided herein;
FIG. 6 is a schematic block diagram of a flue gas deacidification tower according to another embodiment provided herein;
fig. 7 is a schematic step flow chart of a flue gas deacidification method according to an embodiment provided in the present application.
The correspondence between the reference numerals and the component names in fig. 1 to 6 is:
110 deacidification tower body, 120 double fluid nozzle, 130 emergency spray gun, 140 flue gas distributor, 150 first temperature probe, 160 second temperature probe, 170 first manhole, 180 second manhole, 190 flue gas outlet, 200 ash outlet, 210 bracket, 220 cloth bag dust collector, 230 connecting pipe, 240 purifying nozzle, 250 ash valve;
111 tower body, 112 flue gas entering part.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below through the accompanying drawings and the specific embodiments, and it should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and not limit the technical solutions of the present application, and the embodiments of the present application and the technical features in the embodiments of the present application may be combined with each other without conflict.
As shown in fig. 1 to 6, according to a first aspect of an embodiment of the present application, a flue gas deacidification tower is provided, including: the deacidification tower comprises a deacidification tower body 110, wherein the deacidification tower body 110 comprises a tower body 111 and a flue gas inlet part 112 arranged at the top of the tower body 111, and the flue gas inlet part 112 is communicated to the tower body 111; a two-fluid nozzle 120 disposed on the flue gas inlet 112 and connected to the tower 111 for outputting a cooling medium; an emergency spray gun 130, wherein the emergency spray gun 130 is communicated with the tower body 111 and is used for outputting alkaline medium; a flue gas distributor 140 is disposed in the tower 111 for guiding the input flue gas.
The flue gas deacidification tower provided by the embodiment of the application comprises a deacidification tower body 110, a two-fluid nozzle 120, an emergency spray gun 130 and a flue gas distributor 140, in the use process, flue gas generated after incineration can be supplied to a flue gas inlet 112, and then the flue gas distributor 140 can regulate and control the distribution direction and the conveying uniformity of the flue gas, so that the flue gas is supplied into the tower body 111, and in the flue gas supply process, cooling water can be sprayed through the two-fluid spray gun, on one hand, the temperature of the flue gas is reduced; on the other hand, dust in the flue gas is captured, then the flue gas can be supplied into a bag-type dust collector for secondary filtration, alkaline powder and the flue gas can be conveyed for neutralization reaction in the secondary process, and the deacidification of the flue gas can be completed based on the alkaline powder and the flue gas; and when the initial temperature of flue gas is higher or the acid medium content in the flue gas is too high, can open emergent spray gun 130, can export alkaline medium through emergent spray gun 130, can cool down the flue gas, can neutralize the acid medium in the flue gas simultaneously, based on this through the flue gas deacidification tower that this embodiment provided, can be according to county small-size msw incineration system characteristics, combine together dry process and semi-dry deacidification technology, reduce equipment cost and operation degree of difficulty.
In one possible embodiment, the emergency spray gun 130 is four or more, and the emergency spray gun 130 is disposed obliquely.
In this technical scheme, further provided the setting quantity of emergent spray gun 130, emergent spray gun 130 can be four or more, and emergent spray gun 130 slope setting, based on this under special operating mode, can export alkaline medium as early as possible through emergent spray gun 130, and can improve the efficiency that alkaline medium contacted with the flue gas.
In one possible embodiment, the flue gas distributor 140 comprises: the cross sections of the guide plates are arc-shaped, and the whole formed by the guide plates is obliquely arranged relative to the tower body 111.
In this technical scheme, further provide flue gas distributor 140's style, flue gas distributor 140 includes a plurality of interval arrangement, and the cross-section is curved guide plate, so set up through curved guide plate can turn to the direction of delivery of flue gas, can make the flue gas carry more even through the setting of a plurality of guide plates, and the whole that forms through a plurality of guide plates sets up for tower 111 slope, is convenient for with the flue gas supply to tower 111 in.
In one possible embodiment, the flue gas deacidification tower further comprises: a first temperature probe 150, wherein the first temperature probe 150 is connected to the flue gas inlet 112; a second temperature probe 160, wherein the second temperature probe 160 is connected to the middle part of the tower 111; a first manhole 170 formed in the smoke inlet 112; the second manhole 180 is opened on the tower 111.
In this technical scheme, the flue gas deacidification tower can also include first temperature probe 150 and second temperature probe 160, is convenient for learn the temperature when the flue gas enters into the flue gas deacidification tower based on this, is convenient for also learn the temperature of the flue gas after accomplishing the cooling simultaneously, is convenient for control the transportation volume of condensate water, is convenient for control opening and closing of emergent spray gun 130 simultaneously.
In this technical scheme, the flue gas deacidification tower may further include a first man hole 170 and a second man hole 180, so configured to facilitate maintenance of the flue gas deacidification tower.
In one possible embodiment, the flue gas deacidification tower further comprises: a flue gas outlet 190, wherein the flue gas outlet 190 is communicated with the side wall of the tower body 111; an ash outlet 200, wherein the ash outlet 200 is communicated with the bottom of the tower 111; the deacidification tower body 110 is disposed on the bracket 210.
In this technical scheme, the flue gas deacidification tower can also include flue gas export 190, offers the lateral wall at tower body 111 through flue gas export 190, and the flue gas can be discharged through flue gas export 190.
In this technical scheme, the flue gas deacidification tower can also include ash outlet 200, through the setting of ash outlet 200, is convenient for discharge the dust in the flue gas.
In this embodiment, the fixing of the deacidification tower body 110 can be more stable through the arrangement of the bracket 210.
In one possible embodiment, the flue gas deacidification tower further comprises: a cloth bag dust collector 220 and a connecting pipe 230, wherein the cloth bag dust collector 220 is communicated with the flue gas outlet 190 through the connecting pipe 230; a purge nozzle 240, the purge nozzle 240 being in communication with the connection pipe 230.
In this technical scheme, the flue gas deacidification tower can also include sack cleaner 220 and connecting pipe 230, so set up, and the flue gas can carry in the sack cleaner 220 through connecting pipe 230, then can catch the dust in the flue gas again through sack cleaner 220, can make the exhaust flue gas cleaner.
In this technical scheme, the flue gas deacidification tower can also include purification nozzle 240, can export alkaline powder through purification nozzle 240's setting, and alkaline powder can neutralize with the acid medium in the flue gas, and spun powder can form the protection film on sack cleaner 220, can reduce the probability that the flue gas damaged sack cleaner 220, can improve the life of flue gas deacidification tower.
In one possible embodiment, the flue gas deacidification tower further comprises: an ash valve 250, wherein the ash valve 250 is used for controlling the opening and closing of the flue gas outlet 190; and the crushing part is arranged opposite to the ash outlet 200 and is used for crushing caking dust.
In this technical solution, the flue gas deacidification tower may further comprise an ash discharge valve 250, so arranged as to facilitate control of opening and closing of the ash outlet 200, and to facilitate control of stopping or opening of ash discharge. And the dust of the structure can be crushed through the arrangement of the crushing part, so that the dust can be more conveniently treated.
Examples
As shown in fig. 1 to 4, this embodiment provides a flue gas deacidification tower combining a dry process and a semi-dry process deacidification process, including: the device comprises a first temperature measurement probe 150, a first person hole 170, a two-fluid nozzle 120, a smoke distributor 140, an emergency spray gun 130, a deacidification tower body 110, a second temperature measurement probe 160, a bracket 210, a second manhole 180, a smoke outlet 190 and an ash outlet 200.
The top of deacidification tower body 110 is equipped with the flue gas admission line, and the bottom is equipped with flue gas exhaust duct, and flue gas admission line's air outlet department is equipped with flue gas distributor 140, and the top central point of deacidification tower body 110 puts and is equipped with double fluid nozzle 120, is connected with the cooling water interface on double fluid nozzle 120's the inlet, and four emergent spray guns 130 are inserted to one side in the top of deacidification tower body 110, is connected with sodium hydroxide solution interface on emergent spray gun 130's the inlet, deacidification tower body 1106 top, middle part are equipped with first temperature probe 150 and second temperature probe 160 respectively.
The temperature of the flue gas discharged from the tail flue of the waste incineration boiler is 190-210 ℃, the flue gas is introduced into the top of the deacidification tower body 110 through a flue gas pipeline, the flue gas distributor 140 is arranged at the top of the deacidification tower body 110 to change the flow direction of the flue gas, and the flue gas flows into the tower body 111 along the vertical tower diameter direction. The top of the flue gas inlet 112 is inserted with a two-fluid nozzle 120, the cooling water is atomized to about 40 μm by the particle diameter of the nozzle, and is uniformly sprayed into the tower 111 to be mixed with the flue gas for heat exchange, the flue gas is cooled to about 160 ℃, the cooling water is evaporated and heated to about 160 ℃, and the cooling water is uniformly mixed with the flue gas. The cooled flue gas is led out from the quench tower and enters a connecting pipe 230 of the bag-type dust collector, a purifying nozzle 240 is arranged in the horizontal section of the connecting pipe 230, and sodium bicarbonate NaHCO3 powder serving as a deacidification agent is sprayed into the connecting pipe to react with acid gas in the flue gas. And then the flue gas flows into the bag-type dust collector along the flue pipe, sodium bicarbonate powder is sprayed on the surface of a bag of the bag-type dust collector along with the flow of the flue gas to form a layer of medicament film, and in the process of filtering the flue gas through the medicament film, acid gases such as HCl, SO2, HF and the like can be contacted with the medicament, SO that the contact reaction and adsorption efficiency is improved.
When the flue gas amount or the concentration of the acid gas in the flue gas is too high, the sodium hydroxide solution emergency spraying system can be started. And the atomized sodium hydroxide solution is evaporated and reacts with acid gas in the flue gas rapidly. Because the sodium hydroxide solution has high reaction rate and high utilization rate, the liquid injection quantity is smaller, the requirement on the atomization effect of the spray gun is lower, and the spray gun used for SNCR denitration can meet the performance requirement. The second temperature measurement probe 160 arranged in the middle of the tower body 111 measures the temperature of the flue gas in the middle of the tower body 111, adjusts the water spraying amount of the cooling water at the top according to the temperature, controls the temperature of the flue gas, prevents the subsequent cloth bag dust collector 220 from being burnt out due to the fact that the temperature of the flue gas is too high, and prevents the frame of the cloth bag dust collector from being corroded due to the fact that the temperature of the flue gas is too low and the condensation of the flue gas is low.
Compared with the prior art, the invention provides a small-sized flue gas deacidification tower for a waste incineration project, which has the following beneficial effects:
1. the flue gas deacidification tower combines a dry deacidification process and a semi-dry deacidification process, and when the two-fluid nozzle 120 is normally overhauled and fails, the temperature of the flue gas can be reduced from 220 ℃ to 160 ℃ by starting the emergency spray gun 130, so that a subsequent cloth bag dust remover is protected, and the desulfurization deacidification efficiency is ensured. The desulfurization efficiency can be quickly adjusted within the range of 90-97% in general, and the desulfurization efficiency can be flexibly adjusted to adapt to the change of the incineration flue gas load.
2. The flue gas inlet 112 is provided with a flue gas distributor 140, which flue gas distributor 140 enables a uniform flue gas distribution. Compared with a volute type distributor, the structure is simpler, the steel consumption of materials is less, the occupied space is less, the factory building height of a flue gas purifying room can be effectively reduced,
3. the upper part of the flue gas deacidification tower is provided with the two-fluid nozzle 120, and the flue gas deacidification tower is in a dry deacidification mode in normal operation, the atomizing requirement of the dry deacidification technology on cooling water is low, and generally liquid drop particles reach below 40 mu m.
4. The upper part and the middle part of the deacidification tower are respectively provided with the first temperature probe 150 and the second temperature probe 160, so that the fluctuation of the inlet flue gas temperature and the flue gas cooling heat exchange condition can be fed back in time. The flue gas temperature can be regulated and controlled by the two-fluid nozzle 120 and the emergency spray gun 130 at the same time, and can be independently regulated and controlled by the two-fluid nozzle 120 and the emergency spray gun 130 respectively, so that the control mode is various and simple. The spraying quantity of the cooling water can be adjusted timely according to the feedback temperature, and the hardening of fly ash at the bottom of the deacidification tower is avoided.
5. The flue gas deacidification tower that this application embodiment provided is set up in miniaturized msw incineration project flue gas dry deacidification technology, only cools down the flue gas in the flue gas deacidification tower, so the flue gas dwell time is shorter in the tower, and flue gas abundant heat transfer cooling can be guaranteed to >4S, and semi-dry flue gas is in order to make deacidification agent and flue gas intensive mixing, and the flue gas dwell time is in the deacidification tower to be >20S. The invention shortens the residence time of the flue gas, and reduces the height of the tower body 111, thereby reducing the manufacturing cost of equipment and greatly reducing the height of a factory building between flue gas purification.
6. In the traditional technology, the semi-dry deacidification process generally needs to spray calcium hydroxide solution, and the solution contains small calcium hydroxide solid particles which are not completely dissolved, so that the abrasion to a nozzle is large. Only the de-ionized water is sprayed under the normal operation condition of the flue gas deacidification tower, so that the abrasion to the nozzle is small, the life cycle of equipment is prolonged, and the equipment replacement frequency is reduced.
7. The bottom of the flue gas deacidification tower is provided with the airtight type ash discharging valve 250 and the crushing part, the phenomenon that the fly ash is hardened caused by the fact that external cold air flows back into the tower can be effectively improved by the airtight type ash discharging valve 250, and the crushing part can ensure that large blocks of mortar in the tower can be crushed and conveyed in time.
As shown in fig. 7, a flue gas deacidification method according to a second aspect of an embodiment of the present application is provided, and is applied to the flue gas deacidification tower according to any one of the above technical solutions, where the flue gas deacidification method includes:
step 201: controlling the flue gas to enter the tower body through the flue gas inlet part;
step 202: acquiring concentration information of acid gas in the flue gas;
step 203: opening the emergency spray gun and the two-fluid nozzle if the concentration information is greater than a first threshold;
step 204: and in the case that the concentration information is smaller than or equal to a first threshold value, only the two-fluid nozzle is opened.
The flue gas deacidification method provided by the embodiment of the application is applied to the flue gas deacidification tower according to any one of the technical schemes, so that the flue gas deacidification method has all the beneficial effects of the flue gas deacidification tower according to the technical scheme.
According to the flue gas deacidification method provided by the embodiment of the application, the concentration information of the acid gas in the flue gas can be collected, and then the two-fluid nozzle is controlled to be independently opened based on the concentration information of the acid gas, or the emergency spray gun and the two-fluid nozzle are opened simultaneously, so that the deacidification effect can be ensured.
In one possible embodiment, the flue gas deacidification method further comprises: acquiring flue gas temperature information of the inner middle part of the deacidification tower body; opening the emergency spray gun and the two-fluid nozzle if the concentration information is greater than a second threshold; and opening the two-fluid nozzle when the concentration information is less than or equal to a second threshold value.
In the technical scheme, the flue gas deacidification method provided by the embodiment of the application can collect the flue gas temperature information of acid gas in flue gas, and then the two-fluid nozzle is controlled to be independently opened based on the flue gas temperature information, or the emergency spray gun and the two-fluid nozzle are simultaneously opened, so that the cooling effect can be ensured.
In one possible embodiment, the flue gas deacidification method further comprises: and responding to the purifying instruction, controlling the purifying nozzle to spray alkaline powder, neutralizing acid gas in the flue gas by the alkaline powder, and forming a protective film in the bag-type dust collector.
In this technical scheme, can come to neutralize acid gas through purifying nozzle blowout alkaline powder, ensured deacidification effect, and alkaline powder can form the protection film in the sack cleaner, and the flue gas can make acid gas such as HCl, SO2, HF contact with the medicament through the filtration in-process of protection film, has improved contact reaction and absorptive efficiency.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A flue gas deacidification tower, comprising:
the deacidification tower comprises a deacidification tower body and a flue gas inlet part arranged at the top of the tower body, wherein the flue gas inlet part is communicated to the tower body;
the double-fluid nozzle is arranged on the flue gas inlet part and is communicated into the tower body for outputting a cooling medium;
the emergency spray gun is communicated with the tower body and used for outputting alkaline medium;
and the smoke distributor is arranged in the smoke inlet part and used for guiding the input smoke.
2. The flue gas deacidification tower of claim 1, wherein the flue gas deacidification tower comprises,
the emergency spray guns are four or more, and are obliquely arranged.
3. The flue gas deacidification tower of claim 1, wherein the flue gas distributor comprises:
the cross section of the guide plates is arc-shaped, and the whole formed by the guide plates is obliquely arranged relative to the tower body.
4. The flue gas deacidification tower of claim 1, further comprising:
the first temperature measurement probe is connected to the smoke inlet part;
the second temperature measuring probe is connected to the middle part of the tower body;
the first manhole is arranged on the smoke inlet part;
and the second manhole is arranged on the tower body.
5. The flue gas deacidification tower of any one of claims 1 to 4, further comprising:
the flue gas outlet is communicated with the side wall of the tower body;
the ash outlet is communicated with the bottom of the tower body;
the deacidification tower body is arranged on the bracket.
6. The flue gas deacidification tower of claim 5, further comprising:
the cloth bag dust collector is communicated with the flue gas outlet through the connecting pipe;
and the purifying nozzle is communicated with the connecting pipe.
7. The flue gas deacidification tower of claim 5, further comprising:
the ash discharging valve is used for controlling the opening and closing of the ash outlet;
and the crushing part is arranged opposite to the ash outlet and used for crushing caking dust.
8. A flue gas deacidification method, applied to the flue gas deacidification tower according to any one of claims 1 to 7, comprising:
controlling the flue gas to enter the tower body through the flue gas inlet part;
acquiring concentration information of acid gas in the flue gas;
opening the emergency spray gun and the two-fluid nozzle if the concentration information is greater than a first threshold;
and in the case that the concentration information is smaller than or equal to a first threshold value, only the two-fluid nozzle is opened.
9. The flue gas deacidification process of claim 8, further comprising:
acquiring flue gas temperature information of the inner middle part of the deacidification tower body;
opening the emergency spray gun and the two-fluid nozzle if the concentration information is greater than a second threshold;
and opening the two-fluid nozzle when the concentration information is less than or equal to a second threshold value.
10. The flue gas deacidification process of claim 8, further comprising:
and responding to the purifying instruction, controlling the purifying nozzle to spray alkaline powder, neutralizing acid gas in the flue gas by the alkaline powder, and forming a protective film in the bag-type dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311797334.1A CN117771906A (en) | 2023-12-25 | 2023-12-25 | Flue gas deacidification tower and flue gas deacidification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311797334.1A CN117771906A (en) | 2023-12-25 | 2023-12-25 | Flue gas deacidification tower and flue gas deacidification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117771906A true CN117771906A (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311797334.1A Pending CN117771906A (en) | 2023-12-25 | 2023-12-25 | Flue gas deacidification tower and flue gas deacidification method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117771906A (en) |
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2023
- 2023-12-25 CN CN202311797334.1A patent/CN117771906A/en active Pending
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