CN213286283U - High-efficiency double-tower series-connection desulfurization device - Google Patents
High-efficiency double-tower series-connection desulfurization device Download PDFInfo
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- CN213286283U CN213286283U CN202021804074.8U CN202021804074U CN213286283U CN 213286283 U CN213286283 U CN 213286283U CN 202021804074 U CN202021804074 U CN 202021804074U CN 213286283 U CN213286283 U CN 213286283U
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Abstract
The utility model discloses a high-efficient two tower series connection desulphurization unit, include: the lower parts of the first-stage absorption tower, the second-stage absorption tower, the first-stage absorption tower and the second-stage absorption tower are communicated through pipelines; limestone slurry equipment, an accident handling system and oxidation equipment; through with one-level absorption tower and second grade absorption tower intercommunication, can carry out the first absorption desulfurization through one-level desulfurization subassembly to the flue gas that gets into in the one-level absorption tower, can carry out the second absorption desulfurization to the flue gas through set up second grade desulfurization subassembly in the second grade absorption tower, twice absorption desulfurization has improved desulfurization effect to a great extent, and the one-level absorption tower of tower form is favorable to reducing the flue gas pressure drop, the utility model is suitable for a nervous generating set desulfurization of time limit for a project carries the transformation project of imitating, has good regulation characteristic, reasonable in design, convenient operation, long service life, the desulfurization operation is stable, energy-conservation, fall originally, increase, can be reliably under unit operating mode condition and stably continuous operation.
Description
Technical Field
The utility model relates to a sweetener technical field especially relates to a high-efficient two tower series connection desulphurization unit.
Background
With the development of economy, social progress and enhancement of environmental awareness of people, the reduction of the emission of exhaust gas pollutants becomes a key problem of social attention, and particularly, the national constraint index requirements on the emission of main pollutants in the aspects of energy conservation and emission reduction work enable high energy consumption and high SO content2The discharged chemical industry pays more attention to the treatment of the sulfur-containing tail gas. At present, a limestone-gypsum method desulfurization system which operates domestically mainly adopts a traditional single absorption tower, and as the operation time is prolonged, a certain amount of sulfur dioxide still exists in the discharged gas of a tower body easily, so that the desulfurization effect cannot meet the requirement, and once the absorption tower goes wrong, the shutdown of the whole device can be caused, the stable operation of the device is greatly influenced, and as the domestic requirement for environmental protection is continuously improved, the single-tower circulation can not meet the requirements of low energy consumption and high efficiency desulfurization more and more.
Disclosure of Invention
The utility model aims to solve the technical problem that a high-efficient two-tower series connection desulphurization unit that reasonable in design, operation are convenient, long service life, desulfurization operation are stable, energy-conserving, fall this, increase effect is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: high-efficient two tower series connection desulphurization unit, its characterized in that includes:
the device comprises a primary absorption tower, a primary desulfurization component, a primary flue gas inlet, a primary flue gas outlet and a primary desulfurization component, wherein the primary absorption tower is internally provided with the primary desulfurization component;
the device comprises a secondary absorption tower, a secondary desulfurization component is arranged in the secondary absorption tower, a secondary flue gas inlet is arranged at the middle lower part of the secondary absorption tower, a secondary flue gas outlet is arranged at the top of the secondary absorption tower, the primary flue gas outlet is communicated with the secondary flue gas inlet through a steel flue, the secondary flue gas outlet is communicated with a chimney, a gypsum treatment system is arranged at the bottom of the secondary absorption tower, and the primary absorption tower is communicated with the lower part of the secondary absorption tower through a pipeline;
the limestone slurry equipment comprises a limestone slurry tank, a limestone stirrer is arranged in the limestone slurry tank, and the limestone slurry tank is communicated with the lower part of the secondary absorption tower through a limestone slurry pump;
the accident treatment system comprises an accident slurry tank, the accident slurry tank is provided with a top inlet and a bottom outlet, the top inlet is communicated with the lower parts of the primary absorption tower and the secondary absorption tower through a slurry pouring pump, and the bottom outlet is communicated with the middle parts of the primary absorption tower and the secondary absorption tower through an accident slurry pump;
and the oxidation equipment comprises an oxidation fan which is respectively connected with the primary absorption tower and the secondary absorption tower through aeration pipelines.
As an optimized technical scheme, a paint layer is arranged on the outer surface of the steel flue, a heat insulation layer is coated on the outer surface of the paint layer, and a glass flake anticorrosive layer is arranged on the inner surface of the steel flue.
As a preferred technical scheme, the primary desulfurization component comprises a primary spray layer, a primary tray, a primary flue gas inlet and a primary oxidation spray gun which are sequentially arranged in the primary absorption tower from top to bottom, a primary circulating pump is communicated between the bottom of the primary absorption tower and the primary spray layer, and the primary oxidation spray gun is communicated with the oxidation fan;
the second grade desulfurization subassembly includes from the top down sets gradually defroster, second grade spray layer, second grade tray in the second grade absorption tower second grade flue gas entry and second grade oxidation spray gun, the bottom of first grade absorption tower with the first grade sprays and to communicate there is the second grade circulating pump between the layer, second grade oxidation spray gun intercommunication the oxidation fan.
As the preferred technical scheme, the demister is connected with a process water tank through a demister flushing water pump.
As an optimized technical scheme, the first-stage spraying layer and the second-stage spraying layer comprise main pipes respectively communicated with the first-stage circulating pump and the second-stage circulating pump, a plurality of layers of branch pipes which are vertically arranged are arranged on the main pipes, and a plurality of nozzles are uniformly distributed on the branch pipes.
As a preferred technical scheme, the gypsum treatment system comprises a gypsum slurry discharge pump communicated with the bottom of the secondary absorption tower, and the gypsum slurry discharge pump is connected with a hydrocyclone and a vacuum belt filter.
Owing to adopted above-mentioned technical scheme, high-efficient two tower series connection desulphurization unit includes: the device comprises a primary absorption tower, a primary desulfurization component, a primary flue gas inlet, a primary flue gas outlet and a primary desulfurization component, wherein the primary absorption tower is internally provided with the primary desulfurization component; the device comprises a secondary absorption tower, a secondary desulfurization component is arranged in the secondary absorption tower, a secondary flue gas inlet is arranged at the middle lower part of the secondary absorption tower, a secondary flue gas outlet is arranged at the top of the secondary absorption tower, the primary flue gas outlet is communicated with the secondary flue gas inlet through a steel flue, the secondary flue gas outlet is communicated with a chimney, a gypsum treatment system is arranged at the bottom of the secondary absorption tower, and the primary absorption tower is communicated with the lower part of the secondary absorption tower through a pipeline; the limestone slurry equipment comprises a limestone slurry tank, a limestone stirrer is arranged in the limestone slurry tank, and the limestone slurry tank is communicated with the lower part of the secondary absorption tower through a limestone slurry pump; the accident treatment system comprises an accident slurry tank, the accident slurry tank is provided with a top inlet and a bottom outlet, the top inlet is communicated with the lower parts of the primary absorption tower and the secondary absorption tower through a slurry pouring pump, and the bottom outlet is communicated with the middle parts of the primary absorption tower and the secondary absorption tower through an accident slurry pump; the oxidation device comprises an oxidation fan which is respectively connected with the primary absorption tower and the secondary absorption tower through aeration pipelines; the utility model has the advantages that: the primary absorption tower is communicated with the secondary absorption tower, so that the flue gas entering the primary absorption tower can be absorbed and desulfurized for the first time through the primary desulfurization component, the secondary desulfurization component arranged in the secondary absorption tower can carry out secondary absorption desulfurization on the flue gas, the desulfurization effect is greatly improved by twice absorption desulfurization, the tower-shaped primary absorption tower is beneficial to reducing the pressure drop of flue gas, in addition, limestone slurry is added into the secondary circulating pump of the secondary absorption tower, can effectively improve the area of contact and the reaction time of desulfurization absorbent and flue gas, the utility model is suitable for a nervous generating set desulfurization of time limit for a project is carried and is imitated the transformation project, has good regulation characteristic, reasonable in design, operation facility, long service life, desulfurization operation are stable, energy-conservation, fall originally, increase, can be reliably and steadily continuous operation under unit operating mode condition.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a schematic diagram of the structural principle of the embodiment of the present invention.
In the figure: 1-a first-stage absorption tower; 101-first level flue gas inlet; 102-a primary flue gas outlet; 103-first level spraying layer; 104-a first-level tray; 105-a first-order oxidation spray gun; 106-first stage circulation pump; 2-a secondary absorption tower; 201-a secondary flue gas inlet; 202-a secondary flue gas outlet; 203-a demister; 204-a secondary spray layer; 205-a secondary tray; 206-secondary oxidation spray gun; 207-two-stage circulating pump; 3-a chimney; 4-oxidizing the fan; 5-limestone slurry tank; 501-limestone stirrer; 502-limestone slurry pump; 6-accident slurry tank; 601-slurry pouring pump; 602-accident slurry pump; 7-steel flue; 8-a process water tank; 801-demister flushing water pump; 9-gypsum slurry discharge pump.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1, the high-efficiency twin-tower series desulfurization apparatus includes: the device comprises a primary absorption tower 1, wherein a primary desulfurization component is arranged in the primary absorption tower 1, a primary flue gas inlet 101 is arranged at the middle lower part of the primary absorption tower 1, and a primary flue gas outlet 102 is arranged at the tower top of the primary absorption tower 1; a secondary absorption tower 2, wherein a secondary desulfurization component is arranged in the secondary absorption tower 2, a secondary flue gas inlet 201 is arranged at the middle lower part of the secondary absorption tower 2, a secondary flue gas outlet 202 is arranged at the top of the secondary absorption tower 2, the primary flue gas outlet 102 is communicated with the secondary flue gas inlet 201 through a steel flue 7, the secondary flue gas outlet 202 is communicated with a chimney 3, a gypsum treatment system is arranged at the bottom of the secondary absorption tower 2, and the lower parts of the primary absorption tower 1 and the secondary absorption tower 2 are communicated through a pipeline; the pipeline is arranged in the bottom areas of the primary absorption tower 1 and the secondary absorption tower 2, so that the limestone slurry equipment with the same liquid levels of the two towers is ensured, and comprises a limestone slurry tank 5, a limestone stirrer 501 is arranged in the limestone slurry tank 5, and the limestone slurry tank 5 is communicated with the lower part of the secondary absorption tower 2 through a limestone slurry pump 502; the limestone slurry pump 502 is connected with an adjusting valve, in order to mix limestone slurry uniformly and prevent precipitation and scaling, the limestone stirrer 501 is arranged in the limestone slurry tank 5, and the opening degree of the adjusting valve is controlled according to the concentration of sulfur dioxide at the outlet of the secondary tower. The accident treatment system comprises an accident slurry tank 6, wherein the accident slurry tank 6 is provided with a top inlet and a bottom outlet, the top inlet is communicated with the lower parts of the primary absorption tower 1 and the secondary absorption tower 2 through a slurry pouring pump 601, and the bottom outlet is communicated with the middle parts of the primary absorption tower 1 and the secondary absorption tower 2 through an accident slurry pump 602; when the absorption tower overhauls or the accident, will 2 thick liquids in the thick liquid pond of second grade absorption tower by the grout pouring pump 601 discharges accident thick liquids case 6, after the normal operating again by accident thick liquids pump 602 beats the first order absorption tower 1 with second grade absorption tower 2, for making the gypsum thick liquids misce bene, prevent to deposit, scale deposit, be equipped with the thick liquids agitator in the accident thick liquids case 6. The oxidation device comprises an oxidation fan 4, and the oxidation fan 4 is respectively connected with the primary absorption tower 1 and the secondary absorption tower 2 through aeration pipelines; in the bottom area of the primary absorption tower 1, the air supplied by the oxidation fan 4 enters the primary absorption tower 1 and the secondary absorption tower 2 through the aeration pipeline arranged in the slurry tank, calcium sulfite is oxidized into gypsum (CaSO 4.2H 2O) under the action of an absorption tower stirrer, flue gas enters the primary absorption tower 1 from the middle lower part of the primary absorption tower 1, gypsum slurry in the slurry tank of the primary absorption tower 1 is pumped into the primary spray layer 103 through the primary circulating pump 106, the gypsum slurry is contacted and mixed with the flue gas in the primary absorption tower 1, and sulfur dioxide in the flue gas chemically reacts with calcium carbonate in the slurry and blown oxidation air so as to be removed. Through inciting somebody to action one-level absorption tower 1 with second grade absorption tower 2 intercommunication can be to getting into flue gas in the one-level absorption tower 1 passes through the flue gas of one-level desulfurization subassembly carries out the first time and absorbs the desulfurization, through set up in second grade absorption tower 2 second grade desulfurization subassembly can carry out the second time absorption desulfurization to the flue gas, and twice absorption desulfurization has improved desulfurization effect to a great extent, and tower form one-level absorption tower 1 is favorable to reducing the flue gas pressure drop, in addition, adds the limestone slurry second grade absorption tower 2 in the second grade circulating pump 207, can effectively improve the area of contact and the reaction time of desulfurization absorbent and flue gas, the utility model is suitable for a nervous generating set desulfurization improvement project of time limit for a project has good regulation characteristic, reasonable in design, convenient operation, long service life, desulfurization operation are stable, energy-conserving, fall this, The efficiency is increased, and the continuous operation can be reliably and stably carried out under the working condition of the unit.
The outer surface of the steel flue 7 is provided with a paint layer, the outer surface of the paint layer is coated with a heat preservation layer, and the inner surface of the steel flue 7 is provided with a glass flake anticorrosive layer.
As shown in fig. 1, the primary desulfurization module includes a primary spray layer 103, a primary tray 104, a primary flue gas inlet 101, and a primary oxidation spray gun 105, which are sequentially disposed from top to bottom in the primary absorption tower 1, a primary circulation pump 106 is communicated between the bottom of the primary absorption tower 1 and the primary spray layer 103, and the primary oxidation spray gun 105 is communicated with the oxidation fan 4; the secondary desulfurization component comprises a demister 203, a secondary spray layer 204, a secondary tray 205, a secondary flue gas inlet 201 and a secondary oxidation spray gun 206 which are sequentially arranged in the secondary absorption tower 2 from top to bottom, a secondary circulating pump 207 is communicated between the bottom of the primary absorption tower 1 and the primary spray layer 103, and the secondary oxidation spray gun 206 is communicated with the oxidation fan 4.
The primary tray 104 and the secondary tray 205 are used for uniformly distributing the flue gas entering the primary absorption tower 1 and the secondary absorption tower 2, reducing resistance and effectively contacting the flue gas with an absorbent. The primary circulating pump 106 sends the slurry in the primary absorption tower 1 from the lower slurry tank to the primary spray layer 103, and atomized liquid drops with fine particles and high reaction activity are formed after spraying. The arrangement of the primary spraying layers 103 in the primary absorption tower 1 increases the contact area and probability of slurry and gas, ensures that the cross section of the primary absorption tower 1 can be completely full, and fully removes SO2, HF, HCl and the like. Since the absorbent slurry in the primary absorption tower 1 is repeatedly circulated by the primary circulation pump 106 to contact with the flue gas, the utilization rate of the absorbent is high. In the same way, the working principle in the secondary absorption tower 2 is consistent with that of the primary absorption tower 1, and the washed and purified flue gas flows out of the primary absorption tower 1 and is discharged to the secondary absorption tower 2 through the steel flue 7 for secondary absorption.
As shown in fig. 1, the demister 203 is connected to a process water tank 8 by a demister flushing water pump 801. Cleaned flue gas streamThe slurry droplets carried by the flue gas are removed therefrom by the demister 203 to a droplet content of less than 50mg/Nm in the flue gas3. The small droplets separated from the flue gas slowly coalesce into larger droplets which then slide down the lower part of the demister 203 vanes to the slurry tank. The upper part of the demister 203 is provided with an online flushing system, the pressure of flushing water meets the process operation requirement, the flushing water sequentially flushes solid particles deposited on the demister 203 through a flushing nozzle, and the washed and purified flue gas flows out of the secondary absorption tower 2 and is exhausted to the chimney 3 for emptying. The main functions of the water in the process water tank 8 are: the washing water of the demister 203, the washing water of all slurry conveying equipment, conveying pipelines, a slurry tank, the working water of a vacuum pump, the filter cloth filter cake washing water of the vacuum belt dehydrator, the cooling water and the sealing water of the oxidation fan 4 and other equipment, and the like.
As shown in fig. 1, the first-stage spraying layer 103 and the second-stage spraying layer 204 include a main pipe respectively communicated with the first-stage circulating pump 106 and the second-stage circulating pump 207, the main pipe is provided with a plurality of layers of branch pipes arranged up and down, and the branch pipes are uniformly distributed with a plurality of nozzles.
As shown in FIG. 1, the gypsum treatment system comprises a gypsum slurry discharge pump 9 communicated with the bottom of the secondary absorption tower 2, and the gypsum slurry discharge pump 9 is connected with a hydrocyclone and a vacuum belt filter. And gypsum slurry is conveyed to the hydrocyclone and the vacuum belt filter through the gypsum discharge pump for dehydration, so that the water content of the gypsum slurry is less than 10%, and then the gypsum slurry is conveyed to a gypsum storehouse for stacking. The second grade absorption tower 2 sets up the grout pouring pump 601, the export sets up two pipelines, goes respectively accident thick liquid case 6 with one-level absorption tower 1.
The utility model discloses will one-level absorption tower 1 with 2 series operation in second grade absorption tower solve the problem that prior art shut down existence, in addition 2 the limestone slurry in second grade absorption tower passes through second grade circulating pump 207 pipeline gets into in the second grade absorption tower 2, the area and the time of thick liquid and flue gas contact have effectively been increased, this desulphurization unit has reasonable in design, the advantage of convenient operation, has prolonged equipment life greatly, has guaranteed desulfurization system's steady operation, and desulfurization efficiency is higher, improves flue gas desulfurization effect, promotes abandonment environmental protection treatment quality, and the desulfurization has reached the requirement of environmental protection emission, plays energy-conservation, falls originally, the effect of efficiency-increasing, especially carries out the efficiency to the desulfurization and reforms transform the project and have great economic meaning, possesses wide market perspective.
Compared with the traditional limestone-gypsum method for desulfurization, the utility model increases the second-level absorption tower 2. The double-tower series-connection desulfurization breaks through innovation on the basis of single-tower circulation, has unique advantages in large-unit, high-sulfur-content and high-efficiency desulfurization projects, and particularly has the advantages that the construction period can be shortened and the cost can be saved by additionally arranging the secondary absorption tower 2 for the large unit with the sulfur content not reaching the standard. In addition, to newly-increased 2 systems of second grade absorption tower change traditional confession thick liquid mode, add absorbent limestone slurry into the circulating line entry, through the direct, quick entering of circulating pump spray the layer, effectual and reverse flue gas contact improves desulfurization efficiency greatly.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. High-efficient two tower series connection desulphurization unit, its characterized in that includes:
the device comprises a primary absorption tower, a primary desulfurization component, a primary flue gas inlet, a primary flue gas outlet and a primary desulfurization component, wherein the primary absorption tower is internally provided with the primary desulfurization component;
the device comprises a secondary absorption tower, a secondary desulfurization component is arranged in the secondary absorption tower, a secondary flue gas inlet is arranged at the middle lower part of the secondary absorption tower, a secondary flue gas outlet is arranged at the top of the secondary absorption tower, the primary flue gas outlet is communicated with the secondary flue gas inlet through a steel flue, the secondary flue gas outlet is communicated with a chimney, a gypsum treatment system is arranged at the bottom of the secondary absorption tower, and the primary absorption tower is communicated with the lower part of the secondary absorption tower through a pipeline;
the limestone slurry equipment comprises a limestone slurry tank, a limestone stirrer is arranged in the limestone slurry tank, and the limestone slurry tank is communicated with the lower part of the secondary absorption tower through a limestone slurry pump;
the accident treatment system comprises an accident slurry tank, the accident slurry tank is provided with a top inlet and a bottom outlet, the top inlet is communicated with the lower parts of the primary absorption tower and the secondary absorption tower through a slurry pouring pump, and the bottom outlet is communicated with the middle parts of the primary absorption tower and the secondary absorption tower through an accident slurry pump;
and the oxidation equipment comprises an oxidation fan which is respectively connected with the primary absorption tower and the secondary absorption tower through aeration pipelines.
2. The high-efficiency double-tower series-connection desulfurization device as claimed in claim 1, wherein a paint layer is provided on the outer surface of the steel flue, the outer surface of the paint layer is covered with an insulating layer, and the inner surface of the steel flue is provided with a glass flake anticorrosive layer.
3. The efficient double-tower series connection desulfurization device according to claim 1, wherein the primary desulfurization assembly comprises a primary spray layer, a primary tray, the primary flue gas inlet and a primary oxidation spray gun which are sequentially arranged in the primary absorption tower from top to bottom, a primary circulating pump is communicated between the bottom of the primary absorption tower and the primary spray layer, and the primary oxidation spray gun is communicated with the oxidation fan;
the second grade desulfurization subassembly includes from the top down sets gradually defroster, second grade spray layer, second grade tray in the second grade absorption tower second grade flue gas entry and second grade oxidation spray gun, the bottom of first grade absorption tower with the first grade sprays and to communicate there is the second grade circulating pump between the layer, second grade oxidation spray gun intercommunication the oxidation fan.
4. The high efficiency twin tower series desulfurization unit of claim 3, wherein said demister is connected to a process water tank by a demister flush water pump.
5. The desulfurization apparatus of claim 3, wherein said first stage spray layer and said second stage spray layer comprise a main pipe respectively connected to said first stage circulation pump and said second stage circulation pump, said main pipe is provided with a plurality of layers of branch pipes arranged up and down, said branch pipes are uniformly distributed with a plurality of nozzles.
6. The high-efficiency double-tower series desulfurization apparatus according to any one of claims 1 to 5, wherein said gypsum treatment system comprises a gypsum slurry discharge pump communicating with the bottom of said secondary absorption tower, said gypsum slurry discharge pump being connected to a hydrocyclone and a vacuum belt filter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021804074.8U CN213286283U (en) | 2020-08-25 | 2020-08-25 | High-efficiency double-tower series-connection desulfurization device |
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| CN202021804074.8U CN213286283U (en) | 2020-08-25 | 2020-08-25 | High-efficiency double-tower series-connection desulfurization device |
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| CN213286283U true CN213286283U (en) | 2021-05-28 |
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