CN214159157U - Wet desulphurization oxidation system - Google Patents
Wet desulphurization oxidation system Download PDFInfo
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- CN214159157U CN214159157U CN202021261269.2U CN202021261269U CN214159157U CN 214159157 U CN214159157 U CN 214159157U CN 202021261269 U CN202021261269 U CN 202021261269U CN 214159157 U CN214159157 U CN 214159157U
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- fan
- oxidation
- absorption tower
- oxidation system
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 89
- 230000003647 oxidation Effects 0.000 title claims abstract description 86
- 238000010521 absorption reaction Methods 0.000 claims abstract description 45
- 239000006028 limestone Substances 0.000 claims abstract description 22
- 235000019738 Limestone Nutrition 0.000 claims abstract description 20
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 19
- 230000023556 desulfurization Effects 0.000 claims abstract description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003546 flue gas Substances 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 12
- 239000010440 gypsum Substances 0.000 claims description 9
- 229910052602 gypsum Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 230000003584 silencer Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims 1
- 235000011941 Tilia x europaea Nutrition 0.000 claims 1
- 239000004571 lime Substances 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000004537 pulping Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 208000005374 Poisoning Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to a wet flue gas desulfurization oxidation system, including absorption tower (3), absorption tower (3) are connected with oxidation fan (1), and the lime stone in limestone feed bin (51) loops through and enters into after grinding slurrying device (52) and lime stone thick liquid jar (53) are handled carry out the oxidation in absorption tower (3) and generate the lime stone thick liquid, absorption tower (3) output the lime stone thick liquid loops through hydraulic cyclone (21) and vacuum belt filter (22) and handles the back and transport to (23) in storage, its characterized in that: the absorption tower (3) is connected with a sample through a pipelineA cylinder (71) connected, an SA analyzer disposed in the sampling cylinder (71) and used for analyzing the oxidation object CaS0 in the absorption tower (3)3The measurement of the residual quantity concentration reflects the degree of oxidation, and the output signal is used as a control signal of the oxidation air volume.
Description
Technical Field
The utility model relates to a wet flue gas desulfurization oxidation system especially relates to a limestone-gypsum wet flue gas desulfurization oxidation system.
Background
Aiming at the problems that no measurement and control means is available in the oxidation link of the important reaction process of limestone-gypsum wet desulphurization (WFGD), the oxidation air volume cannot be automatically controlled along with the changes of load, sulfur content and the like, the oxidation air volume is excessive or insufficient, the unreasonable air volume distribution is adopted, the waste is caused by the large oxidation air volume, and the potential safety hazard is caused by the insufficient oxidation air volume. The automatic optimization control and safe, energy-saving and environment-friendly operation technology of the desulfurization oxidation air system suitable for high-sulfur and low-sulfur coal is researched and developed, and the automatic optimization control and safe, energy-saving and environment-friendly operation technology is widely applied to the control of the desulfurization oxidation air system of a thermal power plant. The technical scheme of single-tower single-cycle, single-tower double-cycle, double-tower double-cycle and multi-furnace multi-tower combined control and the like is designed for high-sulfur and low-sulfur coal respectively, the blank of measurement and control of a wet desulphurization (WFGD) oxidation link, oxidation air quantity regulation, centralized shared air distribution and the like is filled, a desulphurization oxidation air system can exert the maximum energy-saving potential, automatic energy-saving operation of oxidation air quantity and resource sharing of an oxidation fan are realized, the slurry poisoning risk is reduced, the high-purity quality of gypsum is stabilized, and the oxidation corrosion influence and the desulphurization wastewater treatment difficulty are reduced.
In actual operation, the oxidation fan maintains constant pressure head, constant flow and constant power according to design values, design high-load operation is kept, and oxidation air volume is in a non-monitoring adjustment state. Some owners have felt the problem, even make some transformation, for example adjust the arrangement mode of the oxidation wind pipe in the absorption tower, so as to improve the oxidation uniformity and efficiency, or change the large oxidation fan into a small power fan, some change the large power fan into several small power fans to run in parallel, and adjust the number of fans according to the load, some manually adjust the inlet baffle of the fan, but have no accurate data basis for adjustment, and the method is extensive and blind.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a wet flue gas desulfurization oxidation system, the technical problem of its solution is that the oxidation amount of wind of current oxidation fan does not all have accurate regulation data foundation, extensive, blind.
In order to solve the technical problem existing in the above, the utility model discloses a following scheme:
wet desulfurization oxygenThe system comprises an absorption tower (3), wherein the absorption tower (3) is connected with an oxidation fan (1), limestone in a limestone silo (51) sequentially enters into the absorption tower (3) after being processed through a grinding and pulping device (52) and a limestone slurry tank (53) to be oxidized and generate limestone slurry, the absorption tower (3) outputs the limestone slurry, and the limestone slurry is processed sequentially through a hydraulic cyclone (21) and a vacuum belt filter (22) and then is conveyed to a gypsum silo (23) to be stored, and the system is characterized in that: the absorption tower (3) is connected with a sampling cylinder (71) through a pipeline, an SA analyzer is arranged in the sampling cylinder (71), and the SA analyzer is used for analyzing an oxidation object CaS0 in the absorption tower (3)3The measurement of the residual quantity concentration reflects the degree of oxidation, and the output signal is used as a control signal of the oxidation air volume.
Preferably, the data collected by the SA analyzer are sent to a distributed control device (6).
Preferably, the recovered water separated by the vacuum belt filter (22) is stored in a recovered water tank (24), and the recovered water in the recovered water tank (24) can be returned to the absorption tower (3) for treatment again.
Preferably, the sewage discharged by the absorption tower (3) can also enter the vacuum belt filter (22) for treatment.
Preferably, the raw flue gas enters the absorption tower (3) after passing through an electrostatic dust collector (41), an induced draft fan (42) and a booster fan (43) in sequence.
Preferably, the outlet of the oxidation fan (1) is connected with the absorption tower (3), the outlet of the oxidation fan (1) is provided with a VSR fan adjusting device (14), the VSR fan adjusting device (14) changes the power and the flow of the fan by changing the airflow angle flowing into the fan impeller, the throttling loss is converted into the rotational kinetic energy, and the wind pressure, the flow and the power of the fan are changed simultaneously.
Preferably, the VSR fan adjusting device (14) is provided with an electric actuator (15), the electric actuator (15) is connected with the distributed control device (6) through a wireless or wired mode, and the distributed control device (16) controls the operation of the VSR fan adjusting device (14) through the electric actuator (15).
Preferably, a front transition pipe (17) and a rear transition pipe (13) are respectively arranged on two sides of the VSR fan adjusting device (14), and the rear transition pipe (13) is connected with the fan (12);
preferably, the front transition pipe (17) is connected with one end of a silencer (18), and the other end of the silencer (18) is connected with the absorption tower (3) through a pipeline.
Preferably, the impeller of the oxidation fan (1) is driven by a rotating shaft of a motor (11), a space exists between the motor (11) and the oxidation fan (1), and the rotating shaft between the motor (11) and the oxidation fan (1) is positioned in a closed cavity.
The wet desulphurization oxidation system has the following beneficial effects:
(1) the utility model discloses a SA analysis appearance is through to oxidation object CaS0 in the absorption tower3The measurement of the residual quantity concentration reflects the degree of oxidation, and the output signal is used as a control signal of the oxidation air volume.
(2) The utility model discloses a VSR adjusts technique and adopts in advance to revolve air regulation device and replace frequency conversion, liquid idol and permanent magnetism speed governing. The power of the fan is changed by changing the angle of airflow flowing into the impeller of the fan, the throttling loss is converted into rotational kinetic energy, and the wind pressure, the flow and the power of the fan are changed simultaneously. When VSR is adopted for adjustment, although the rotating speed of the fan is kept unchanged, the current of the motor can be reduced and a large amount of electricity can be saved because the flow of the fan can be changed timely.
(3) The utility model discloses the fan reduces when the flow is 50% of rated value, and frequency conversion regulation fan outlet pressure is 25% of rated value only. And the VSR adjustment keeps the rotating speed of the fan unchanged, and when the air volume is reduced by 50%, the air pressure of the fan has a rated value of 65%, so that the VSR adjustment technology is suitable for the flow adjustment requirement of the desulfurization oxidation fan and has excellent flow-pressure adjustment performance.
(4) The utility model discloses use SA + VSR automatic optimization control technique, can realize the oxidation amount of wind along with the real-time automatic adjustment of the change of thick liquid sulfite concentration, make actual fan air feed volume unanimous with required oxidation air volume, oxidation reaction is in the optimum condition in making the absorption tower, maintain reasonable level, realize automatic control, energy-conserving operation, really realize the totality energy-conservation, the environmental protection, safety, can maintain higher gypsum purity simultaneously, lower redox potential (ORP) has reduced the solubility of Hg, make the waste water treatment degree of difficulty reduce.
Drawings
FIG. 1: the components of the wet desulphurization oxidation system are connected schematically;
FIG. 2: the utility model discloses well oxidation fan structure schematic diagram.
Description of reference numerals:
1-oxidation fan; 11-a motor; 12-a fan body; 13-a post-transition pipe; 14-VSR fan regulation; 15-electric actuator; 16-a support; 17-a front transition duct; 18-a muffler;
21-a hydrocyclone; 22-vacuum belt filter; 23-gypsum bin; 24-a recovered water storage tank; 3-an absorption tower; 31-a chimney; 41-an electrostatic precipitator; 42-induced draft fan; 43-booster fan; 51-limestone silo; 52-grinding and pulping device; 53-limestone slurry tank; 6-distributed control means; 71-sampling tube.
Detailed Description
The present invention will be further explained with reference to fig. 1 to 2:
as shown in figure 1, the wet desulphurization oxidation system comprises an absorption tower 3, wherein the absorption tower 3 is connected with an oxidation fan 1, limestone in a limestone bin 51 sequentially passes through a grinding and pulping device 52 and a limestone slurry tank 53 for treatment, then enters the absorption tower 3 for oxidation to generate limestone slurry, the absorption tower 3 outputs the limestone slurry, sequentially passes through a hydraulic cyclone 21 and a vacuum belt filter 22 for treatment, then is conveyed to a gypsum bin 23 for storage, the absorption tower 3 is connected with a sampling cylinder 71 through a pipeline, an SA analyzer is arranged in the sampling cylinder 71 and is used for analyzing an oxidation object CaS0 in the absorption tower 33Measuring the concentration of the residual to reflect the degree of oxidation, and outputting the signal as oxidationAnd (5) control signals of air quantity.
The SA analyzer directly measures, detects the range of 0-1000ppm, and uploads the control signal to the distributed control device 6 through 4-20mA DC. The data collected by the SA analyzer are sent to the distributed control apparatus 6.
The recovered water separated by the vacuum belt filter 22 is stored in the recovered water tank 24, and the recovered water in the recovered water tank 24 can be returned to the absorption tower 3 to be treated again. The sewage discharged from the absorption tower 3 can also be treated in the vacuum belt filter 22. The raw flue gas passes through the electrostatic dust collector 41, the induced draft fan 42 and the booster fan 43 in sequence and then enters the absorption tower 3.
As shown in fig. 2, the outlet of the oxidation fan 1 is connected to the absorption tower 3, the outlet of the oxidation fan 1 is provided with a VSR fan adjusting device 14, the VSR fan adjusting device 14 changes the power and flow of the fan by changing the flow angle of the air flowing into the fan impeller, and converts the throttling loss into rotational kinetic energy, so that the wind pressure, flow and power of the fan are changed simultaneously.
The VSR fan adjusting device 14 is provided with an electric actuator 15, the electric actuator 15 is connected with the distributed control device 6 in a wireless or wired mode, and the distributed control device 16 controls the VSR fan adjusting device 14 to work through the electric actuator 15.
A front transition pipe 17 and a rear transition pipe 13 are respectively arranged on two sides of the VSR fan adjusting device 14, and the rear transition pipe 13 is connected with the fan 12;
the front transition pipe 17 is connected with one end of a silencer 18, and the other end of the silencer 18 is connected with the absorption tower 3 through a pipeline. The impeller of the oxidation fan 1 is driven by the rotating shaft of the motor 11, a space exists between the motor 11 and the oxidation fan 1, and the rotating shaft between the motor 11 and the oxidation fan 1 is positioned in the closed cavity.
The wet desulphurization oxidation system has the following beneficial effects:
(1) the utility model discloses a SA analysis appearance is through to oxidation object CaS0 in the absorption tower3The measurement of the residual quantity concentration reflects the degree of oxidation, and the output signal is used as a control signal of the oxidation air volume.
(2) The utility model discloses a VSR adjusts technique and adopts in advance to revolve air regulation device and replace frequency conversion, liquid idol and permanent magnetism speed governing. The power of the fan is changed by changing the angle of airflow flowing into the impeller of the fan, the throttling loss is converted into rotational kinetic energy, and the wind pressure, the flow and the power of the fan are changed simultaneously. When VSR is adopted for adjustment, although the rotating speed of the fan is kept unchanged, the current of the motor can be reduced and a large amount of electricity can be saved because the flow of the fan can be changed timely.
(3) The utility model discloses the fan reduces when the flow is 50% of rated value, and frequency conversion regulation fan outlet pressure is 25% of rated value only. And the VSR adjustment keeps the rotating speed of the fan unchanged, and when the air volume is reduced by 50%, the air pressure of the fan has a rated value of 65%, so that the VSR adjustment technology is suitable for the flow adjustment requirement of the desulfurization oxidation fan and has excellent flow-pressure adjustment performance.
(4) The utility model discloses use SA + VSR automatic optimization control technique, can realize the oxidation amount of wind along with the real-time automatic adjustment of the change of thick liquid sulfite concentration, make actual fan air feed volume unanimous with required oxidation air volume, oxidation reaction is in the optimum condition in making the absorption tower, maintain reasonable level, realize automatic control, energy-conserving operation, really realize the totality energy-conservation, the environmental protection, safety, can maintain higher gypsum purity simultaneously, lower redox potential (ORP) has reduced the solubility of Hg, make the waste water treatment degree of difficulty reduce.
The present invention has been described in detail with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements of the method concept and the technical solution of the present invention can be made without modification, or the present invention can be directly applied to other occasions without modification, and is within the protection scope of the present invention.
Claims (10)
1. The utility model provides a wet flue gas desulfurization oxidation system, includes absorption tower (3), and absorption tower (3) are connected with oxidation fan (1), and the lime stone in limestone stone feed bin (51) loops through after grinding slurrying device (52) and limestone slurry jar (53) are handled entering into carry out the oxidation and generate the limestone slurry in absorption tower (3), absorption tower (3) output the lime stoneThe slurry is processed by a hydrocyclone (21) and a vacuum belt filter (22) in sequence and then is conveyed to a gypsum bin (23) for storage, and the method is characterized in that: the absorption tower (3) is connected with a sampling cylinder (71) through a pipeline, an SA analyzer is arranged in the sampling cylinder (71), and the SA analyzer is used for analyzing an oxidation object CaS0 in the absorption tower (3)3The measurement of the residual quantity concentration reflects the degree of oxidation, and the output signal is used as a control signal of the oxidation air volume.
2. The wet desulfurization oxidation system according to claim 1, wherein: and the data collected by the SA analyzer are sent to a distributed control device (6).
3. The wet desulfurization oxidation system according to claim 2, wherein: the reclaimed water separated by the vacuum belt filter (22) is stored in a reclaimed water storage tank (24), and the reclaimed water in the reclaimed water storage tank (24) can be returned to the absorption tower (3) for treatment again.
4. The wet desulfurization oxidation system according to claim 3, wherein: the sewage discharged by the absorption tower (3) can also enter the vacuum belt filter (22) for treatment.
5. The wet desulfurization oxidation system according to claim 4, wherein: and the original flue gas sequentially passes through an electrostatic dust collector (41), an induced draft fan (42) and a booster fan (43) and then enters the absorption tower (3).
6. The wet desulfurization oxidation system according to any one of claims 1 to 5, wherein: the export of oxidation fan (1) is connected with absorption tower (3), the export of oxidation fan (1) is equipped with VSR fan adjusting device (14), VSR fan adjusting device (14) reach change fan power and flow through the air current angle who changes inflow fan wheel, convert the throttle loss into rotational kinetic energy, make the wind pressure of fan, flow and power change simultaneously.
7. The wet desulfurization oxidation system according to claim 6, wherein: the VSR fan adjusting device (14) is provided with an electric actuator (15), the electric actuator (15) is connected with the distributed control device (6) in a wireless or wired mode, and the distributed control device (6) controls the VSR fan adjusting device (14) to work through the electric actuator (15).
8. The wet desulfurization oxidation system according to claim 7, wherein: VSR fan adjusting device (14) both sides are equipped with preceding transition pipe (17) and back transition pipe (13) respectively, back transition pipe (13) with fan (12) are connected.
9. The wet desulfurization oxidation system according to claim 8, wherein: the front transition pipe (17) is connected with one end of a silencer (18), and the other end of the silencer (18) is connected with the absorption tower (3) through a pipeline.
10. The wet desulfurization oxidation system according to claim 9, wherein: the impeller of the oxidation fan (1) is driven by a rotating shaft of a motor (11), a space exists between the motor (11) and the oxidation fan (1), and the rotating shaft between the motor (11) and the oxidation fan (1) is positioned in a sealed cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021261269.2U CN214159157U (en) | 2020-07-02 | 2020-07-02 | Wet desulphurization oxidation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021261269.2U CN214159157U (en) | 2020-07-02 | 2020-07-02 | Wet desulphurization oxidation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214159157U true CN214159157U (en) | 2021-09-10 |
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ID=77589499
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021261269.2U Expired - Fee Related CN214159157U (en) | 2020-07-02 | 2020-07-02 | Wet desulphurization oxidation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214159157U (en) |
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2020
- 2020-07-02 CN CN202021261269.2U patent/CN214159157U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210910 |
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| CF01 | Termination of patent right due to non-payment of annual fee |