CN204042943U - Desulfurization system for thermal power plant - Google Patents
Desulfurization system for thermal power plant Download PDFInfo
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- CN204042943U CN204042943U CN201420489928.6U CN201420489928U CN204042943U CN 204042943 U CN204042943 U CN 204042943U CN 201420489928 U CN201420489928 U CN 201420489928U CN 204042943 U CN204042943 U CN 204042943U
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- power plant
- thermal power
- heat exchanger
- aqueous vapor
- desulfurization system
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Abstract
The utility model relates to pre-heat recovery technology field in thermal power plant, specifically, relate to a kind of desulfurization system for thermal power plant, also comprise the waste-heat recovery device of oxidation wind system, demister (14) and spraying layer (15) are set up in the top on the absorption tower (23) in desulphurization system, effectively reduce oxidation wind temperature protection absorption tower (23), reduce " improper " moisturizing on absorption tower (23) simultaneously; In the waste-heat recovery device of oxidation wind system, increase aqueous vapor heat exchanger (22), effectively reclaim high-temperature oxydation wind-heat amount.
Description
Technical field
The utility model relates to pre-heat recovery technology field in thermal power plant, in particular to a kind of desulfurization system for thermal power plant.
Background technology
At present, thermal power plant wet desulfurization system oxidation fan is roots blower, outlet air temperature is up to 125 DEG C, for reducing air themperature, installing spray desuperheating device additional at the female pipe of oxidation wind, after oxidation wind spray cooling, having entered absorption tower, this kind of method of operation is equivalent to absorption tower " abnormal " moisturizing, affect mist eliminator flushing number of times to reduce, affect desulphurization system economical operation, and in oxidation wind system.
Such as application number is the Chinese invention patent of 201010192424.4, it discloses a kind of the low-temperature flue gas waste heat Application way and the system that contain sulfur removal technology, in existing boiler or the flue between furnace flue gas air-introduced machine and chimney, arrange rotary type heat exchanger and spray equipment, the rotary type heat exchanger NaOH that spray equipment sprays out when rotary work or lime aqueous solution can restrain the heat, dust and the sulfide that carry out in the simultaneously stability low-temperature flue gas cleaned by heat exchanger.Realize the system of said method primarily of shower and shower nozzle, rotary tube bundle heat exchanger, shower water circulating pump, pond composition, rotary tube bundle heat exchanger is arranged in boiler or the flue between furnace flue gas air-introduced machine and chimney, on the top of rotary tube bundle heat exchanger and bottom, shower and shower nozzle are set, the bottom of rotary tube bundle heat exchanger is provided with pond, and shower is communicated with pond is formed circulating water loop by shower water circulating pump.Realize the object of flue gas being carried out to desulfurization process while low temperature exhaust heat is recycled.But the waste heat in a large amount of oxidation wind existed in this system is not effectively reclaimed; In addition, fail effectively to remove to the fog in absorption tower, affect the economical operation of desulphurization system.
Such as application number is the Chinese invention patent of 201210256641.4 again, it discloses a kind of smoke waste heat utilization system, two solidifying heat exchangers are increased between desulfurizing tower and carbon dioxide capture system, to absorb flue gas heat, to reduce exhaust gas temperature, absorb heat and be respectively used to heat-setting water and drink municipal heating.Two gas coolers are set between electric cleaner and desulfurizing tower, the heat reclaimed are respectively used to heating boiler First air and further heat-setting water from flue gas.Air heater is set between air intake and air preheater, the heat heating boiler First air reclaimed from flue gas by gas cooler.The present invention puies forward effect to power plant for energy conservation positive role, especially has very important significance to the operation power plant being difficult to be improved by the mode of raising steam parameter effectiveness of regenerator.By optimizing the operational factor of unit, increasing condensate water and adding thermal bypass, improving the wind-warm syndrome of coming entering air preheater, the utilization that can reduce the hear rate of whole electro-heat equipment, reduce pollutant emission, improve the energy.But the high-temperature flue gas in this system directly passes into the damage that can cause desulfurizing tower in desulfurizing tower, and the waste of heat can be caused.
Utility model content
In order to solve the above-mentioned technological deficiency that prior art exists, the purpose of this utility model is to provide a kind of desulfurization system for thermal power plant, also comprise the waste-heat recovery device of oxidation wind system, demister and spraying layer are set up in the top on the absorption tower in desulphurization system, effectively reduce oxidation wind temperature protection absorption tower, reduce " improper " moisturizing on absorption tower simultaneously; In the waste-heat recovery device of oxidation wind system, increase aqueous vapor heat exchanger, effectively reclaim high-temperature oxydation wind-heat amount.
In order to realize above-mentioned purpose of design, the scheme that the utility model adopts is as follows:
A kind of desulfurization system for thermal power plant, also comprise the waste-heat recovery device of oxidation wind system, desulphurization system comprises deduster, flue gas heat-exchange unit and absorption tower, and demister and spraying layer are set up in the top on the absorption tower in desulphurization system; Aqueous vapor heat exchanger is set up in oxidation wind system.Demister and spraying layer are set up in the top on the absorption tower in desulphurization system, effectively reduce oxidation wind temperature protection absorption tower, reduce " improper " moisturizing on absorption tower simultaneously; In the waste-heat recovery device of oxidation wind system, increase aqueous vapor heat exchanger, effectively reclaim high-temperature oxydation wind-heat amount.
The course of work of the present utility model is: the flue gas that boiler produces is through deduster dedusting, and a part of clean air enters chimney through air-introduced machine and discharges; A part delivers to flue gas heat-exchange unit by booster fan, then enter in absorption tower through flue gas heat-exchange unit, with the caustic lime stone slurries droplet counter current contacting sprayed from top to bottom, acidic oxide sulfur dioxide wherein and other pollutant HCl, HF etc. are absorbed, flue gas is able to abundant purification, slurry reaction after sulfur dioxide absorption generates calcium sulfite, by passing into oxidation wind forced oxidation, crystallization generates calcium sulphate dihydrate, after dehydration, obtain commerical grade desulfuration byproduct-gypsum, finally realize the comprehensive regulation of sulfur-containing smoke gas.
In above process, outlet air temperature from oxidation fan is 125 DEG C, at this moment under inscribing before not increasing oxidation fan flowing resistance, adjust aqueous vapor heat exchanger heat exchange area and oxidation wind flow area, introduce the demineralized water from steam turbine low-pressure calorifier inlets, cooling water is after air-water heat exchanger heating, and during summer, backwater is recycled to the female pipe of steam turbine low-pressure heater outlet and is recovered; Be recycled in heat supply network during heating network operation during winter.Cooling water some be sent in absorption tower through air-water heat exchanger and carry out desulfurization process.
Preferably, air-introduced machine and booster fan is provided with between deduster and flue gas heat-exchange unit.
In above-mentioned either a program preferably, the medium in described spraying layer is caustic lime stone slurries.Flue gas is able to abundant purification, and the slurry reaction after sulfur dioxide absorption generates calcium sulfite, and by passing into oxidation wind forced oxidation, crystallization generates calcium sulphate dihydrate, obtains commerical grade desulfuration byproduct-gypsum, finally realize the comprehensive regulation of sulfur-containing smoke gas after dehydration.
In above-mentioned either a program preferably, the middle part on described absorption tower is provided with pallet.
In above-mentioned either a program preferably, import and the steam turbine low-pressure calorifier inlets mother of described aqueous vapor heat exchanger manage, oxidation fan mother pipe is connected.
In above-mentioned either a program preferably, the outlet of described aqueous vapor heat exchanger is connected with absorption tower 23.
In above-mentioned either a program preferably, the outlet of described aqueous vapor heat exchanger is connected with heat supply network by pipeline.
In above-mentioned either a program preferably, the outlet of described aqueous vapor heat exchanger is also connected by the female pipe of pipeline and steam turbine low-pressure heater outlet.
In above-mentioned either a program preferably, the pipeline between described aqueous vapor heat exchanger and heat supply network is provided with temperature sensor.When temperature is lower than 10 DEG C, cooling water, after air-water heat exchanger heating, is recycled in heat supply network during heating network operation.
In above-mentioned either a program preferably, the pipeline between described aqueous vapor heat exchanger and the female pipe of steam turbine low-pressure heater outlet is provided with temperature sensor.When temperature is higher than 22 DEG C, cooling water is after air-water heat exchanger heating, and backwater is recycled to the female pipe of steam turbine low-pressure heater outlet and is recovered.
Accompanying drawing explanation
Fig. 1 is the structural representation of the preferred embodiment according to desulfurization system for thermal power plant of the present utility model.
Fig. 2 is the structure principle chart of aqueous vapor heat exchanger in the Fig. 1 according to desulfurization system for thermal power plant of the present utility model.
Attached number in the figure:
Boiler 10, deduster 11, flue gas heat-exchange unit 12, pallet 13, demister 14, spraying layer 15, chimney 16, the female pipe 20 of steam turbine low-pressure calorifier inlets, the female pipe 21 of oxidation fan, aqueous vapor heat exchanger 22, absorption tower 23, heat supply network 24, the female pipe 25 of steam turbine low-pressure heater outlet.
Detailed description of the invention
The following description is only exemplary and be not to limit the disclosure, application or purposes in essence.Be further described below in conjunction with the detailed description of the invention of Figure of description to the utility model desulfurization system for thermal power plant.
As shown in Figure 1, according to the structural representation of a preferred embodiment of desulfurization system for thermal power plant of the present utility model.A kind of desulfurization system for thermal power plant of the utility model, also comprise the waste-heat recovery device of oxidation wind system, desulphurization system comprises deduster 11, flue gas heat-exchange unit 12 and absorption tower 23, and demister 14 and spraying layer 15 are set up in the top on the absorption tower 23 in desulphurization system; Aqueous vapor heat exchanger 22 is set up in oxidation wind system.Demister 14 and spraying layer 15 are set up in the top on the absorption tower 23 in desulphurization system, effectively reduce oxidation wind temperature protection absorption tower 23, reduce " improper " moisturizing on absorption tower 23 simultaneously, and use demist gas flushing water to wash by water, avoid dirt retention in fog in absorption tower 23, corrosion is caused to absorption tower 23; In the waste-heat recovery device of oxidation wind system, increase aqueous vapor heat exchanger 22, effectively reclaim high-temperature oxydation wind-heat amount.
The course of work of the present utility model is: the flue gas that boiler 10 produces is through deduster 11 dedusting, and the clean air of a part enters chimney 16 through air-introduced machine and discharges; A part delivers to flue gas heat-exchange unit 12 by booster fan, then enter in absorption tower 23 through flue gas heat-exchange unit 12, with the caustic lime stone slurries droplet counter current contacting sprayed from top to bottom, acidic oxide sulfur dioxide wherein and other pollutant HCl, HF etc. are absorbed, flue gas is able to abundant purification, slurry reaction after sulfur dioxide absorption generates calcium sulfite, by passing into oxidation wind forced oxidation, crystallization generates calcium sulphate dihydrate, after dehydration, obtain commerical grade desulfuration byproduct-gypsum, finally realize the comprehensive regulation of sulfur-containing smoke gas.
In the present embodiment, air-introduced machine and booster fan is provided with between deduster 11 and flue gas heat-exchange unit 12.
In the present embodiment, the medium in described spraying layer 15 is caustic lime stone slurries.Flue gas is able to abundant purification, and the slurry reaction after sulfur dioxide absorption generates calcium sulfite, and by passing into oxidation wind forced oxidation, crystallization generates calcium sulphate dihydrate, obtains commerical grade desulfuration byproduct-gypsum, finally realize the comprehensive regulation of sulfur-containing smoke gas after dehydration.In addition, in desulfurization system for thermal power plant of the present utility model, carrying out recovery waste heat by installing aqueous vapor heat exchanger 22 additional, the water supplementing method on absorption tower 23 can be optimized simultaneously.
In the present embodiment, the middle part on described absorption tower 23 is provided with pallet 13.
As shown in Figure 2, the fundamental diagram of the aqueous vapor heat exchanger 22 in desulfurization system for thermal power plant of the present utility model.In above process (as shown in Figure 1), outlet air temperature from oxidation fan is 125 DEG C, at this moment under the prerequisite not increasing oxidation fan flowing resistance, adjust aqueous vapor heat exchanger heat exchange area and oxidation wind flow area, the demineralized water introduced from steam turbine low-pressure calorifier inlets carries out desuperheat, cooling water is after air-water heat exchanger 22 heats, and during summer, backwater is recycled to the female pipe 25 of steam turbine low-pressure heater outlet and is recovered; Be recycled to when during winter, heat supply network 6 runs in heat supply network 6.Cooling water some be sent in absorption tower 23 through air-water heat exchanger 22 and carry out desulfurization process.
In the present embodiment, the import of described aqueous vapor heat exchanger 22 is connected with the female pipe 20 of steam turbine low-pressure calorifier inlets, the female pipe 21 of oxidation fan.To be sent in aqueous vapor heat exchanger 22 by the female pipe 21 of oxidation fan from the oxidation wind of oxidation fan and to lower the temperature; Steam in steam turbine low-pressure heater is sent in aqueous vapor heat exchanger 22 by the female pipe 20 of steam turbine low-pressure calorifier inlets lowers the temperature.
In the present embodiment, the outlet of described aqueous vapor heat exchanger 22 is connected with absorption tower 23.
In the present embodiment, the outlet of described aqueous vapor heat exchanger 22 is connected with heat supply network 6 by pipeline.When temperature is lower than 10 DEG C, cooling water, after air-water heat exchanger 22 heats, is recycled to when heat supply network 6 runs in heat supply network 6.
In the present embodiment, the outlet of described aqueous vapor heat exchanger 22 is also connected by the female pipe 25 of pipeline and steam turbine low-pressure heater outlet.When temperature is higher than 22 DEG C, cooling water is after air-water heat exchanger 22 heats, and backwater is recycled to the female pipe 25 of steam turbine low-pressure heater outlet and is recovered.
In the present embodiment, the pipeline between described aqueous vapor heat exchanger 22 and heat supply network 6 is provided with temperature sensor.When temperature is lower than 10 DEG C, this signal sends by temperature sensor, and the demineralized water from steam turbine low-pressure calorifier inlets enters air-water heat exchanger 22 and heats, and is recycled in heat supply network 6 when heat supply network 6 runs.
In the present embodiment, the pipeline between described aqueous vapor heat exchanger 22 and the female pipe 25 of steam turbine low-pressure heater outlet is provided with temperature sensor.When temperature is higher than 22 DEG C, this signal sends by temperature sensor, and the demineralized water from steam turbine low-pressure calorifier inlets enters air-water heat exchanger 22 and heats, and backwater is recycled to the female pipe 25 of steam turbine low-pressure heater outlet and is recovered.
In sum, having the following advantages of desulfurization system for thermal power plant of the present utility model: demister 14 and spraying layer 15 are set up in the top on the absorption tower 23 in desulphurization system, effectively reduce oxidation wind temperature protection absorption tower 23, reduce " improper " moisturizing on absorption tower 23 simultaneously; In the waste-heat recovery device of oxidation wind system, increase aqueous vapor heat exchanger 22, effectively reclaim high-temperature oxydation wind-heat amount; Effectively reduce oxidation wind temperature protection absorption tower.
It will be apparent to those skilled in the art that desulfurization system for thermal power plant of the present utility model comprises any combination of each several part in this description.As space is limited and in order to make description simple and clear, these combinations are not introduced one by one in detail at this, but after having seen this description, the scope of the present utility model that any combination of each several part be made up of this description is formed is self-evident.
Claims (10)
1. a desulfurization system for thermal power plant, also comprise the waste-heat recovery device of oxidation wind system, desulphurization system comprises deduster (11), flue gas heat-exchange unit (12) and absorption tower (23), it is characterized in that: demister (14) and spraying layer (15) are set up in the top on the absorption tower (23) in desulphurization system; Aqueous vapor heat exchanger (22) is set up in oxidation wind system.
2. desulfurization system for thermal power plant as claimed in claim 1, is characterized in that: be provided with air-introduced machine and booster fan between described deduster (11) and flue gas heat-exchange unit (12).
3. desulfurization system for thermal power plant as claimed in claim 1, is characterized in that: the medium in described spraying layer (15) is caustic lime stone slurries.
4. desulfurization system for thermal power plant as claimed in claim 1, is characterized in that: the middle part of described absorption tower (23) is provided with pallet (13).
5. desulfurization system for thermal power plant as claimed in claim 1, is characterized in that: import and the steam turbine low-pressure calorifier inlets mother of described aqueous vapor heat exchanger (22) manage that (20), oxidation fan are female manages (21) and be connected.
6. desulfurization system for thermal power plant as claimed in claim 1, is characterized in that: the outlet of described aqueous vapor heat exchanger (22) is connected with absorption tower (23).
7. the desulfurization system for thermal power plant as described in claim 1 or 6, is characterized in that: the outlet of described aqueous vapor heat exchanger (22) is connected with heat supply network (6) by pipeline.
8. the desulfurization system for thermal power plant as described in claim 1 or 6, is characterized in that: the outlet of described aqueous vapor heat exchanger (22) is also managed (25) by pipeline with steam turbine low-pressure heater outlet mother and is connected.
9. desulfurization system for thermal power plant as claimed in claim 7, is characterized in that: the pipeline between described aqueous vapor heat exchanger (22) and heat supply network (6) is provided with temperature sensor.
10. desulfurization system for thermal power plant as claimed in claim 8, is characterized in that: described aqueous vapor heat exchanger (22) and the female pipeline of managing between (25) of steam turbine low-pressure heater outlet are provided with temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420489928.6U CN204042943U (en) | 2014-08-28 | 2014-08-28 | Desulfurization system for thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420489928.6U CN204042943U (en) | 2014-08-28 | 2014-08-28 | Desulfurization system for thermal power plant |
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| CN204042943U true CN204042943U (en) | 2014-12-24 |
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| CN201420489928.6U Expired - Fee Related CN204042943U (en) | 2014-08-28 | 2014-08-28 | Desulfurization system for thermal power plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214449A (en) * | 2015-10-09 | 2016-01-06 | 姜超 | A kind of boiler waste gas treating device |
| CN105582764A (en) * | 2016-02-29 | 2016-05-18 | 西安西热锅炉环保工程有限公司 | Treatment system and method for flue gas generated by wet desulphurization device in thermal power plant |
| CN109985499A (en) * | 2019-04-16 | 2019-07-09 | 程琛 | A kind of desulfurization oxidized input air intelligent Matching method and system |
-
2014
- 2014-08-28 CN CN201420489928.6U patent/CN204042943U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214449A (en) * | 2015-10-09 | 2016-01-06 | 姜超 | A kind of boiler waste gas treating device |
| CN105582764A (en) * | 2016-02-29 | 2016-05-18 | 西安西热锅炉环保工程有限公司 | Treatment system and method for flue gas generated by wet desulphurization device in thermal power plant |
| CN109985499A (en) * | 2019-04-16 | 2019-07-09 | 程琛 | A kind of desulfurization oxidized input air intelligent Matching method and system |
| CN109985499B (en) * | 2019-04-16 | 2024-02-23 | 程琛 | Intelligent matching method and system for desulfurization and oxidation air quantity |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20160828 |
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| CF01 | Termination of patent right due to non-payment of annual fee |