CN211753906U - Thermal power plant flue gas wet desulphurization system with multi-parameter monitoring function - Google Patents
Thermal power plant flue gas wet desulphurization system with multi-parameter monitoring function Download PDFInfo
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- CN211753906U CN211753906U CN201922114574.2U CN201922114574U CN211753906U CN 211753906 U CN211753906 U CN 211753906U CN 201922114574 U CN201922114574 U CN 201922114574U CN 211753906 U CN211753906 U CN 211753906U
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 239000003546 flue gas Substances 0.000 title claims abstract description 73
- 238000012544 monitoring process Methods 0.000 title claims abstract description 33
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 54
- 230000023556 desulfurization Effects 0.000 claims abstract description 54
- 238000006243 chemical reaction Methods 0.000 claims abstract description 53
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000002002 slurry Substances 0.000 claims abstract description 38
- 238000003303 reheating Methods 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 6
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 89
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 230000003009 desulfurizing effect Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000003795 desorption Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 16
- 235000010269 sulphur dioxide Nutrition 0.000 description 16
- 239000002245 particle Substances 0.000 description 13
- 239000002699 waste material Substances 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 6
- 239000000920 calcium hydroxide Substances 0.000 description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 6
- 238000010801 machine learning Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 229910052925 anhydrite Inorganic materials 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 150000003568 thioethers Chemical class 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 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
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004291 sulphur dioxide Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
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Abstract
The utility model discloses a flue gas wet flue gas desulfurization system of thermal power plant with multi-parameter monitoring function, include dust remover, heat exchanger, booster fan, wet flue gas desulfurization system, flue gas reheating device and flue gas monitoring module, the intelligent regulation control module that set gradually along the air current direction. The wet desulphurization system comprises a wet desulphurization reaction tower, a desulfurizer slurry supply device, a circulating air blowing device and a diversion bed layer arranged in the wet desulphurization reaction tower. The utility model discloses an adopt wet flue gas desulfurization system to carry out the desulfurization to thermal power plant's flue gas, through designing wet flue gas desulfurization reaction tower, can the efficient advantage of full play wet flue gas desulfurization technology desulfurization, improve system to sulfur dioxide's desorption efficiency and effect.
Description
Technical Field
The utility model relates to a waste gas treatment technical field, in particular to flue gas wet flue gas desulfurization system of thermal power plant with multi-parameter monitoring function.
Background
The wet process has high reaction speed, high efficiency and high desulfurization additive utilization rate, and when lime is used as a desulfurizer, the desulfurization rate can reach 90% theoretically when Ca/S is 1, so that the wet process is suitable for flue gas desulfurization of large coal-fired power stations. But the existing wet desulphurization system has the technical problems of complex structure, high manufacturing cost, overhigh energy consumption, ineffective monitoring of the treatment process and the like.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the present invention is to provide a thermal power plant flue gas wet desulphurization system with multi-parameter monitoring function, which comprises a dust remover, a heat exchanger, a booster fan, a wet desulphurization system, a flue gas reheating device, a flue gas monitoring module and an intelligent regulation control module, which are arranged in sequence along the airflow direction;
the wet desulphurization system comprises a wet desulphurization reaction tower, a desulfurizer slurry supply device, a circulating air blowing device and a diversion bed layer arranged in the wet desulphurization reaction tower; the inlet end in the wet desulphurization reaction tower is also provided with heating equipment;
the outlet end of the heat exchanger is communicated to the inlet end of the wet desulphurization reaction tower through an air inlet pipeline, and the desulfurizer slurry supply equipment is communicated to the inside of the wet desulphurization reaction tower through an air inlet pipeline;
the flue gas monitoring module is in including setting up first sulfur dioxide sensor, first flow sensor and first temperature sensor on booster fan's the entry end, setting are in second temperature sensor and pressure sensor in the wet flue gas desulfurization reaction tower, setting are in second flow sensor on the charge-in pipeline and the second sulfur dioxide sensor of setting on the exit end of wet flue gas desulfurization reaction tower.
Preferably, the desulfurizer slurry supply equipment comprises a slurry storage tank, a feeding pipeline, an electromagnetic valve arranged on the feeding pipeline, a feeding pump arranged on the feeding pipeline, and a spraying device which is arranged in the wet desulphurization reaction tower and is communicated with the tail end of the feeding pipeline.
Preferably, the first flow sensor is used for monitoring the flow rate of flue gas entering the booster fan, and the second flow sensor is used for monitoring the flow rate of desulfurizer slurry entering the wet desulphurization reaction tower.
Preferably, the wet desulphurization reaction tower comprises a lower conical part, a cylindrical part and an upper conical part which are sequentially arranged from bottom to top along the air inlet direction, the bottom of the lower conical part is provided with an air inlet communicated with the air inlet pipeline, and the top of the upper conical part is provided with an air outlet;
the cylindrical part is provided with a circulating gas outlet and a circulating gas inlet; the circulating gas outlet is arranged along the periphery of the cylindrical part in a tangential direction, and the circulating gas outlet is arranged at 1/2H-2/3H, wherein H is the height of the cylindrical part;
the recycle gas inlet is tangentially arranged along the periphery of the bottom end of the cylindrical portion.
Preferably, the circulation blower device comprises a circulation blower, a first circulation pipeline communicating the circulation gas outlet with the gas inlet end of the circulation blower, and a second circulation pipeline communicating the gas outlet end of the circulation blower with the circulation gas inlet, wherein the circulation blower is used for pumping part of gas in the cylindrical part from the circulation gas outlet as circulation gas to be conveyed into the cylindrical part from the circulation gas inlet.
Preferably, the guide bed layer comprises a plurality of guide plates connected with the inner wall of the cylindrical part, and the guide plates are obliquely downwards arranged along the inner wall of the cylindrical part towards the direction of the circle center of the cylindrical part;
the lengths of the guide plates are sequentially increased from bottom to top, and cavities formed in the middle of all the guide plates are in a conical shape.
The utility model has the advantages that:
the utility model discloses an adopt wet flue gas desulfurization system to carry out the desulfurization to thermal power plant's flue gas, through designing wet flue gas desulfurization reaction tower, can the efficient advantage of full play wet flue gas desulfurization technology desulfurization, the improvement system can carry out intelligent matching to each equipment through combining intelligent regulation control module and adjust sulfur dioxide's desorption efficiency and effect, reduces energy consumption greatly, reduction in production cost.
The utility model introduces the circulating gas in the tangential direction of the gas inlet end of the cylindrical part to be mixed with the entering waste gas, and forms a rotational flow in the cylindrical part, thereby greatly improving the desulfurization effect, reducing the content of sulfur dioxide in the finally discharged gas and ensuring that the discharging requirement can be met; the gas rises in a swirling flow manner, so that the collision and contact between the gas and desulfurizer slurry suspended in the wet desulphurization reaction tower and desulfurizer particles in the flow guide bed layer can be greatly enhanced, and the reaction efficiency of sulfides in the gas and the desulfurizer is improved; after the swirling gas collides with the desulfurizer, the reaction product on the surface of the desulfurizer can be efficiently stripped and abraded by the scouring action of the swirling gas, so that the desulfurizer particles are exposed out of a new surface to continuously react with sulfides in the gas, and the desulfurization efficiency and effect can be further improved; the swirling gas can obviously improve the flow power of gas rising and ensure that the flow velocity meets the requirement; in addition, lifting force can be generated through rotational flow, solid particles in gas can be prevented from sinking, and the desulfurization effect is ensured.
The utility model can increase the contact area between the guide plate and the desulfurizer by arranging the inclined guide plate filled with desulfurizer particles, and can guide the flow of the desulfurizer slurry to slowly drop the desulfurizer slurry to fully contact with flue gas, thereby increasing the desulfurization efficiency; in addition, a conical cavity is formed in the middle of the guide plates, so that the guide plates can be matched with gas rising in a swirling flow, collision and contact between the gas and desulfurizer particles are enhanced to the maximum extent, and the desulfurization efficiency and effect are improved.
Drawings
FIG. 1 is a schematic structural diagram of a wet flue gas desulfurization system with multi-parameter monitoring function for a thermal power plant of the present invention;
FIG. 2 is a schematic view of the direction of the circulating gas;
FIG. 3 is a schematic view of the intake direction of the circulating gas according to the present invention;
fig. 4 is a schematic block diagram of the intelligent regulation control module of the present invention.
Description of reference numerals:
1-a dust remover; 2-a heat exchanger; 3, a booster fan; 4-a wet desulfurization system; 6, intelligently adjusting a control module; 7-a flue gas reheating device; 8-an air inlet duct; 9-waste recovery equipment; 40-a wet desulphurization reaction tower; 41-desulfurizing agent slurry supply equipment; 42-circulation air-blast equipment; 43-diversion bed layer; 44-a heating device; 51-a first sulphur dioxide sensor; 52 — first flow sensor; 53 — first temperature sensor; 54 — a second temperature sensor; 55-a pressure sensor; 56 — second flow sensor; 57-a second sulphur dioxide sensor; 60-a machine learning unit; 61-parameter storage recording unit; 62-a control unit; 401 — lower cone portion; 402-a cylindrical portion; 403 — upper cone part; 404 — an air inlet; 405-an air outlet; 406 — recycle gas outlet; 407-recycle gas inlet; 410-slurry storage tank; 411 — feed line; 412-solenoid valve; 413-supply pump; 414-spraying means; 420-circulation blower; 421 — a first circulation conduit; 422-a second circulation conduit; 430-baffle.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It should be understood that the model parameters of the sensor and the control module in this embodiment have no special design requirements, and the technical solution of the present invention is to improve the structure of the desulfurization system itself, and protect the system structure and the connection relationship, not the specific control process and method.
For better understanding of the working process of the system, the present embodiment provides an optimized control method for a control module to improve the processing efficiency of the system, but the utility model discloses what the scheme protected is the system architecture, and is not the process, the utility model discloses a complete implementation does not rely on this control method to realize.
The thermal power plant flue gas wet desulphurization system with the multi-parameter monitoring function comprises a dust remover 1, a heat exchanger 2, a booster fan 3, a wet desulphurization system 4, a flue gas reheating device 7, a flue gas monitoring module and an intelligent regulation control module 6 which are arranged in sequence along the airflow direction,
the wet desulphurization system 4 comprises a wet desulphurization reaction tower 40, a desulfurizer slurry supply device 41, a circulating air blowing device 42 and a guide bed layer 43 arranged inside the wet desulphurization reaction tower 40; the inlet end in the wet desulphurization reaction tower 40 is also provided with a heating device 44;
the outlet end of the dust remover 1 is communicated with the heat exchanger 2, the outlet end of the heat exchanger 2 is communicated to the inlet end of the wet desulphurization reaction tower 40 through an air inlet pipeline 8, and a desulfurizer slurry supply device 41 is communicated to the interior of the wet desulphurization reaction tower 40 through a feeding pipeline 411;
the flue gas monitoring module comprises a first sulfur dioxide sensor 51, a first flow sensor 52 and a first temperature sensor 53 which are arranged on the inlet end of the booster fan 3, a second temperature sensor 54 and a pressure sensor 55 which are arranged in the wet desulphurization reaction tower 40, a second flow sensor 56 which is arranged on the feeding pipeline 411 and a second sulfur dioxide sensor 57 which is arranged on the outlet end of the wet desulphurization reaction tower 40;
the intelligent regulation control module 6 includes a machine learning unit 60, a parameter storage and recording unit 61, and a control unit 62. The control unit 62 is electrically connected with the booster fan 3, the wet desulphurization system 4 (the circulating blower 420, the heating device 44, the desulfurizing agent slurry supply device 41 therein), and the flue gas monitoring module (each sensor therein). The intelligent regulation control module 6 adopts a machine learning algorithm to optimize desulfurization process parameters on the basis of big data, automatically controls each device, and can reduce the power consumption of the whole system to the minimum on the premise of meeting the desulfurization standard, reduce the energy consumption to the maximum degree and save the production cost.
The flue gas reheating device 7 is used for reheating the flue gas discharged by the wet desulphurization system 4 so as to be beneficial to discharging the flue gas outside and entering the next operation or entering a chimney for discharging.
The desulfurizing agent slurry supply apparatus 41 includes a slurry storage tank 410, a feed pipe 411, an electromagnetic valve 412 provided on the feed pipe 411, a feed pump 413 provided on the feed pipe 411, and a shower device 414 provided in the wet desulfurization reaction tower 40 and communicating with the end of the feed pipe 411. The supply flow rate of the desulfurizing agent slurry can be controlled by controlling the electromagnetic valve 412 and the desulfurizing agent slurry supply pump. The first flow sensor 52 is used for monitoring the flow rate of flue gas entering the booster fan 3, and the second flow sensor 56 is used for monitoring the flow rate of the desulfurizer slurry entering the wet desulphurization reaction tower 40.
A waste recovery device 9 is also included in this embodiment. The waste recovery equipment 9 is used for recovering the desulfurizer reacted with sulfur dioxide, the waste discharge bin gate is arranged at the bottom of the wet desulphurization reaction tower 40, when the waste is discharged, the waste discharge bin gate is opened, the waste is conveyed to the waste recovery equipment 9, and the waste discharge bin gate is kept closed in normal work.
The utility model discloses a thermal power plant's flue gas wet flue gas desulfurization system 4 with multi-parameter monitoring function sets up at thermal power plant's flue gas exhaust system's end for carry out wet flue gas desulfurization to the flue gas and handle.
The flue gas is dedusted by the deduster 1, then is partially preheated by the recovery of the heat exchanger 2, is pressurized and accelerated by the booster fan 3, and then enters the wet desulfurization reaction tower 40 for desulfurization treatment, and the desulfurizer slurry can be limestone slurry. Limestone slurry in the slurry storage tank 410 is pumped into the wet desulphurization reaction tower 40 through a feeding pipeline 411 by a feeding pump 413, and is sprayed into the wet desulphurization reaction tower 40 through a spraying device 414 to react with flue gas. The chemical reaction is as follows:
SO2+H2O→H2SO3
CaSO3+H2SO3→CaSO3+CO2+H2O
SO3+Ca(OH)2→CaSO4+H2O
2CaSO3+O2→2CaSO4
CaSO4+2H2O→CaSO4·2H2O。
4NO+3O2+2Ca(OH)2→2Ca(NO3)2+2H2O。
in a preferred embodiment, the wet desulphurization reaction tower 40 comprises a lower conical part 401, a cylindrical part 402 and an upper conical part 403 which are sequentially arranged from bottom to top along the air inlet direction, the bottom of the lower conical part 401 is provided with an air inlet 404 communicated with the air inlet pipeline 8, and the top of the upper conical part 403 is provided with an air outlet 405;
the cylindrical part 402 is provided with a circulating gas outlet 406 and a circulating gas inlet 407; the recycle gas outlet 406 is tangentially located along the circumference of the cylindrical portion 402 and the recycle gas outlet 406 is located at 1/2H-2/3H, H being the height of the cylindrical portion 402; the recycle gas inlet 407 is arranged tangentially along the circumference of the bottom end of the cylindrical body 402.
The circulation blower device 42 includes a circulation blower 420, a first circulation pipe 421 for communicating the circulation gas outlet 406 with the gas inlet end of the circulation blower 420, and a second circulation pipe 422 for communicating the gas outlet end of the circulation blower 420 with the circulation gas inlet 407, wherein the circulation blower 420 is used for pumping out part of the gas in the cylindrical portion 402 from the circulation gas outlet 406 as circulation gas to be conveyed into the cylindrical portion 402 from the circulation gas inlet 407.
The heating device 44 is arranged within the lower cone portion 401. After heat exchange is carried out on the flue gas by the heat exchanger 2, the temperature is greatly reduced, and then the flue gas enters the wet desulphurization reaction tower 40. The inside of the wet desulphurization reaction tower 40 needs to be ensured with a proper temperature value to improve the desulphurization reaction efficiency, because the flue gas is cooled, whether the temperature is too low is mainly monitored, and if the temperature is too low, the heating equipment 44 is controlled to work, so that the temperature inside the wet desulphurization reaction tower 40 reaches a proper range.
After the slurry of the desulfurizing agent is fed into the wet desulfurization reaction tower 40 by the desulfurizing agent slurry feeding device 41, the slurry of the desulfurizing agent in the wet desulfurization reaction tower 40 is in a suspended state under the action of the ascending gas flow, and is filled with gasSeparate contact for absorbing SO in gas2、SO3。
In a further preferred embodiment, the diversion bed layer 43 comprises a plurality of diversion plates 430 connected with the inner wall of the cylindrical portion 402, and the diversion plates 430 are arranged in a downward-inclined manner along the inner wall of the cylindrical portion 402 towards the center of the circle, so that the contact area between the diversion plates 430 and the desulfurizer can be increased, and simultaneously, the diversion is performed on the desulfurizer slurry, so that the desulfurizer slurry slowly descends, fully contacts with flue gas, and the desulfurization efficiency is increased. The lengths of the plurality of flow deflectors 430 are sequentially increased from bottom to top, and the cavities formed among all the flow deflectors 430 are in a cone shape. The inside of the guide plate 430 is hollow, micropores are densely formed in the surface of the guide plate 430, desulfurizer particles are filled in the guide plate 430, and the guide plate 430 can be replaced after being used for a period of time. The space formed in the middle of the guide plate 430 is large at the lower part, and the larger the space is, the smaller the space is, the sulfur dioxide content at the lower part is the highest, the gas is dense, the flow rate is large, and the larger the space is, so that the collision between the gas and the desulfurizer slurry and between desulfurizer particles is increased, and the reaction speed is accelerated; the gas rises in a swirling flow, and the longer the guide plate 430 is, the smaller the space is, the more sufficient the desulfurization is, the lower the sulfur dioxide content of the final tail gas is, and the flow rate is increased, so that the tail gas discharge is promoted. The conical cavity is formed by the guide plate 430, and the collision contact between the gas and the desulfurizer slurry and between the gas and the desulfurizer particles can be enhanced to the greatest extent by matching with the gas rising in the rotational flow, so that the desulfurization efficiency and effect are improved.
In one embodiment, the desulfurizer particles filled in the flow guide plate 430 are porous calcium hydroxide particles to desulfurize gas, and most SO can be removedXThe waste gas and the desulfurizer calcium hydroxide are subjected to chemical reaction to remove SO in the waste gas2、SO3The chemical reaction is as follows:
SO2+Ca(OH)2→CaSO3+H2O
SO3+Ca(OH)2→CaSO4+H2O
2CaSO3+O2→2CaSO4
CaSO4+2H2O→CaSO4·2H2O
in addition, CO in the exhaust gas2And NO also reacts with the desulfurizer chemically, so that flue gas denitration can be carried out smoothly. The chemical reaction formula is as follows:
CO2+Ca(OH)2→CaCO3+H2O
4NO+3O2+2Ca(OH)2→2Ca(NO3)2+2H2O。
the desulfurizer thick liquid that sprays collides with the flue gas against the current and contacts and carries out the desulfurization, and the flue gas still collides with the desulfurizer granule of packing in guide plate 430 simultaneously and contacts and carries out the desulfurization, and the desulfurizer thick liquid jointly carries out the desulfurization with the desulfurizer granule to the flue gas, and the concrete structure of above-mentioned wet flue gas desulfurization reaction tower 40 is cooperated, can improve desulfurization efficiency and desulfurization effect greatly.
In the above embodiment, the recycle gas inlet 407 is tangentially arranged, the entering recycle gas forms a rotational flow in the cylindrical portion 402, the exhaust gas and the recycle gas are mixed and spirally ascend to sequentially pass through the guide plates 430, and the beneficial effects of the arrangement at least include:
1) by circulating and desulfurizing some gases subjected to desulfurization treatment by part of the diversion bed layer 43, the desulfurization effect can be greatly improved, and the content of sulfur dioxide in finally discharged gases is reduced, so that the emission requirement can be met; wherein the larger the amount of circulating gas, the lower the content of sulfur dioxide in the finally discharged gas.
2) The gas rises in a swirling manner, so that the collision and contact between the gas and the suspended desulfurizer slurry and the desulfurizer particles filled in the guide bed layer 43 can be greatly enhanced, and the reaction efficiency of sulfides in the gas and the desulfurizer is improved;
3) after the swirling gas collides with the desulfurizer slurry and desulfurizer particles, the reaction product on the surface of the desulfurizer can be efficiently stripped and abraded by the scouring action of the swirling gas, so that the desulfurizer is exposed out of a new surface to continuously react with sulfides in the gas, and the desulfurization efficiency and effect can be further improved.
The utility model generates rotational flow by introducing the circulating gas flowing in tangentially, which can obviously improve the rising flow power of the gas and ensure that the flow speed and the pressure meet the requirements; in addition, higher lifting force can be generated through the rotational flow, solid particles in gas are prevented from sinking, and the desulfurization effect is ensured.
The following process is disclosed only for the sake of better understanding by those skilled in the art.
In a preferred embodiment, the parameter storage and recording unit 61 stores and records different process parameters corresponding to the condition that sulfur dioxide in the finally discharged tail gas meets requirements under different gas inlet parameters; the machine learning unit 60 analyzes and compares the data in the parameter storage and recording unit 61, and selects the optimal process parameter data; the control unit 62 adjusts and controls the devices in the flue gas desulfurization system with flue gas monitoring and control functions based on the big data according to the optimal process parameter data analyzed and obtained by the machine learning unit 60.
Wherein the air inlet parameters comprise the sulfur dioxide concentration, the flue gas flow and the flue gas temperature of the flue gas entering the booster fan 3;
the process parameters comprise the power of the booster fan 3, the circulating blower 420 and the heating device 44 and the supply flow of the desulfurizer slurry;
the optimal process parameter data are as follows: process parameter data when the total power of the booster fan 3, the circulating blower 420 and the heating equipment 44 is minimum and the supply flow of the desulfurizer and the desulfurizer is minimum when the sulfur dioxide in the finally discharged tail gas meets the requirement;
the parameter storage and recording unit 61 records the process parameters of the booster fan 3 and the wet desulphurization system 4 and the monitoring values of the flue gas monitoring module, and the machine learning unit 60 performs comparative analysis on the data in the parameter storage and recording unit 61 to obtain the optimal process parameters of the flue gas desulphurization system based on big data and having the functions of monitoring and regulating flue gas under different gas inlet parameters.
While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields where the invention is suitable, and further modifications may readily be made by those skilled in the art, and the invention is therefore not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (6)
1. A thermal power plant flue gas wet desulphurization system with a multi-parameter monitoring function is characterized by comprising a dust remover, a heat exchanger, a booster fan, a wet desulphurization system, a flue gas reheating device, a flue gas monitoring module and an intelligent regulation control module which are sequentially arranged along the direction of air flow;
the wet desulphurization system comprises a wet desulphurization reaction tower, a desulfurizer slurry supply device, a circulating air blowing device and a diversion bed layer arranged in the wet desulphurization reaction tower; the inlet end in the wet desulphurization reaction tower is also provided with heating equipment;
the outlet end of the heat exchanger is communicated to the inlet end of the wet desulphurization reaction tower through an air inlet pipeline, and the desulfurizer slurry supply equipment is communicated to the inside of the wet desulphurization reaction tower through an air inlet pipeline;
the flue gas monitoring module is in including setting up first sulfur dioxide sensor, first flow sensor and first temperature sensor on booster fan's the entry end, setting are in second temperature sensor and pressure sensor in the wet flue gas desulfurization reaction tower, setting are in second flow sensor on the charge-in pipeline and the second sulfur dioxide sensor of setting on the exit end of wet flue gas desulfurization reaction tower.
2. The thermal power plant flue gas wet desulfurization system with multi-parameter monitoring function according to claim 1, wherein the desulfurizing agent slurry supply device comprises a slurry storage tank, a feeding pipeline, an electromagnetic valve arranged on the feeding pipeline, a feeding pump arranged on the feeding pipeline, and a spraying device arranged in the wet desulfurization reaction tower and communicated with the tail end of the feeding pipeline.
3. The thermal power plant flue gas wet desulphurization system with multi-parameter monitoring function of claim 2, wherein the first flow sensor is used for monitoring the flow rate of flue gas entering the booster fan, and the second flow sensor is used for monitoring the flow rate of desulfurizer slurry entering the wet desulphurization reaction tower.
4. The thermal power plant flue gas wet desulphurization system with multi-parameter monitoring function of claim 3, wherein the wet desulphurization reaction tower comprises a lower conical part, a cylindrical part and an upper conical part which are arranged in sequence from bottom to top along the air inlet direction, the bottom of the lower conical part is provided with an air inlet communicated with the air inlet pipeline, and the top of the upper conical part is provided with an air outlet;
the cylindrical part is provided with a circulating gas outlet and a circulating gas inlet; the circulating gas outlet is arranged along the periphery of the cylindrical part in a tangential direction, and the circulating gas outlet is arranged at 1/2H-2/3H, wherein H is the height of the cylindrical part;
the recycle gas inlet is tangentially arranged along the periphery of the bottom end of the cylindrical portion.
5. The thermal power plant flue gas wet desulfurization system with multi-parameter monitoring function according to claim 4, wherein the circulation blower device comprises a circulation blower, a first circulation pipeline communicating the circulation gas outlet with the inlet end of the circulation blower, and a second circulation pipeline communicating the outlet end of the circulation blower with the circulation gas inlet, wherein the circulation blower is used for extracting part of gas in the cylindrical body from the circulation gas outlet and conveying the extracted gas as circulation gas to the cylindrical body from the circulation gas inlet.
6. The thermal power plant flue gas wet desulphurization system with multi-parameter monitoring function of claim 5, wherein the diversion bed layer comprises a plurality of diversion plates connected with the inner wall of the cylindrical part, and the diversion plates are arranged along the inner wall of the cylindrical part and are inclined downwards towards the center of the cylindrical part;
the lengths of the guide plates are sequentially increased from bottom to top, and cavities formed in the middle of all the guide plates are in a conical shape.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115814581A (en) * | 2022-11-09 | 2023-03-21 | 浙江大学 | Environment-friendly intelligent control system for limestone-gypsum wet flue gas desulfurization |
| CN117679941A (en) * | 2023-10-31 | 2024-03-12 | 华能烟台八角热电有限公司 | Wet desulfurization device and control system thereof |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115814581A (en) * | 2022-11-09 | 2023-03-21 | 浙江大学 | Environment-friendly intelligent control system for limestone-gypsum wet flue gas desulfurization |
| CN117679941A (en) * | 2023-10-31 | 2024-03-12 | 华能烟台八角热电有限公司 | Wet desulfurization device and control system thereof |
| CN117679941B (en) * | 2023-10-31 | 2025-01-17 | 华能烟台八角热电有限公司 | A wet desulfurization device and its control system |
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