CN113230851A - Boiler flue gas purification waste heat utilization system with concentration function - Google Patents
Boiler flue gas purification waste heat utilization system with concentration function Download PDFInfo
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- CN113230851A CN113230851A CN202110690871.0A CN202110690871A CN113230851A CN 113230851 A CN113230851 A CN 113230851A CN 202110690871 A CN202110690871 A CN 202110690871A CN 113230851 A CN113230851 A CN 113230851A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/263—Drying gases or vapours by absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
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- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
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Abstract
The invention discloses a boiler flue gas purification waste heat utilization system with a concentration function, which comprises a wet desulfurization moisture absorption spraying flue gas-salt solution heat exchange device, a flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger and a salt solution concentration regeneration device, wherein the air inlet of the wet desulfurization moisture absorption spraying flue gas-salt solution heat exchange device is communicated with a flue gas outlet of a boiler; the salt solution concentration and regeneration device can concentrate the dilute salt solution generated in the wet-type desulfurization moisture absorption spraying flue gas-salt solution heat exchange device to form a strong salt solution, and the strong salt solution is supplied to the wet-type desulfurization moisture absorption spraying flue gas-salt solution heat exchange device for spraying. The invention realizes the recycling of the salt solution in the flue gas waste heat utilization and purification process.
Description
Technical Field
The invention relates to the technical field of flue gas treatment, in particular to a boiler flue gas purification waste heat utilization system with a concentration function.
Background
With the increase of economy and the improvement of the requirement of people on living quality, the energy demand must be increased, since the improvement and the opening, the whole energy consumption of China is in a stable increase situation, the total energy consumption is 4.64Gtce in 2018, the energy consumption is increased by 7.13 times in 1978, meanwhile, the energy structure is also changed greatly, the proportion of coal and oil in the total energy consumption is reduced, and the proportion of natural gas, primary power, other energy and other clean energy consumption is continuously increased. Although coal has been consumed as an important component of energy in an amount of less than 59.0% in total weight, the amount of coal consumption is still increasing. The energy utilization of natural gas and coal resources mostly adopts a boiler combustion mode to release energy and convert the energy into heat energy or electric energy for reutilization. The strict implementation of the current environmental protection necessity and policy makes the measures of energy conservation and emission reduction of boiler operation more important.
The flue gas generated and discharged when the boiler fuel burns and outputs energy contains gases such as sulfide and nitric oxide or solid particle pollutants, and the temperature is high at the same time, so that the heat loss of the flue gas is caused. In order to reach the emission standard, the boiler flue gas must be subjected to desulfurization and denitrification and then is discharged. But the existing boiler flue gas treatment has the problems of relatively low desulfurization and denitrification efficiency, water body pollution caused by desulfurized salt solution, high acid dew point, high temperature and high heat loss of acid corrosion flue gas and the like.
Disclosure of Invention
The invention aims to provide a boiler flue gas purification waste heat utilization system with a concentration function, which is used for solving the problems in the prior art and realizing the recycling of salt liquid in the flue gas waste heat utilization and purification processes.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a boiler flue gas purification waste heat utilization system with a concentration function, which comprises a wet desulfurization and moisture absorption spray flue gas-salt solution heat exchange device, a flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger and a salt solution concentration regeneration device, wherein the gas inlet of the wet desulfurization and moisture absorption spray flue gas-salt solution heat exchange device is communicated with the flue gas outlet of a boiler, the gas outlet of the wet desulfurization and moisture absorption spray flue gas-salt solution heat exchange device is communicated with the gas inlet of the flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger, and the gas outlet of the flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger is communicated with the gas inlet of a chimney;
the salt solution concentration and regeneration device can concentrate the dilute salt solution generated in the wet-type desulfurization and moisture absorption spraying flue gas-salt solution heat exchange device to form a strong salt solution, and the strong salt solution is supplied to the wet-type desulfurization and moisture absorption spraying flue gas-salt solution heat exchange device for spraying.
Preferably, the liquid outlet of the wet desulfurization moisture absorption spray flue gas-salt solution heat exchange device is communicated to a desulfurization moisture absorption dilute salt solution pool, the desulfurization moisture absorption dilute salt solution pool is communicated with the salt solution concentration regeneration device through a dilute salt solution pipe, and a pressure pump and a dilute salt solution filtering device are arranged on the dilute salt solution pipe.
Preferably, the liquid outlet of the salt solution concentration and regeneration device is communicated to a desulfurization and moisture absorption strong salt solution sedimentation tank, the desulfurization and moisture absorption strong salt solution overflow salt supplementing tank is separated from the desulfurization and moisture absorption strong salt solution sedimentation tank through a static pressure permeation filter screen, and the concentrated solution in the desulfurization and moisture absorption strong salt solution sedimentation tank can overflow the static pressure permeation filter screen to the desulfurization and moisture absorption strong salt solution overflow salt supplementing tank.
Preferably, the desulfurization and moisture absorption strong brine overflow salt supplementing pool is communicated with a liquid inlet of the brine-water heat exchanger through a strong brine pipe, and a liquid outlet of the brine-water heat exchanger is communicated with a liquid inlet of the wet desulfurization and moisture absorption spraying flue gas-brine heat exchange device.
Preferably, the salt solution concentration and regeneration device comprises a dilute salt solution negative pressure flash vaporization concentration tank and a concentration and evaporation steam condensation cooling and water storage tank, the middle part of the dilute salt liquid negative pressure flash gasification concentration tank is provided with a dilute salt liquid spraying atomization device, the top part is provided with a liquid baffle plate, one end of the dilute brine pipe, which is far away from the desulfurization and moisture absorption dilute brine tank, is communicated with a liquid inlet of the dilute brine spraying and atomizing device, the bottom end of the dilute salt solution negative pressure flash gasification concentration tank is provided with a strong salt solution discharge pipe and a decontamination solution discharge pipe, the top end of the dilute salt liquid negative pressure flash vaporization concentration tank is communicated with the air inlet of the jet flow spray pipe through a steam outlet pipe, the water outlet of the jet flow spray pipe is communicated with the feed inlet of the condensed and evaporated steam condensing, cooling and water storage tank, and a clear water discharge pipe is further arranged on the condensed and evaporated steam condensing, cooling and water storage tank.
Preferably, a heat exchange coil is arranged in the condensed and evaporated steam condensing and cooling and water storage tank, a water inlet of the flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger is communicated with a water outlet of a softened water tank of the boiler, a water outlet of the flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger is communicated with a water inlet of the salt liquid-water heat exchanger, a water outlet of the salt liquid-water heat exchanger is communicated with a water inlet of the heat exchange coil, and a water outlet of the heat exchange coil is communicated with a water feeding pipe of the boiler.
Preferably, the bottom end of the condensed and evaporated steam condensing and cooling water storage tank is communicated with the feed inlet of the jet flow spray pipe through a water return pipe, and a water jet flow jet pressure pump is arranged on the water return pipe.
Preferably, static pressure infiltration filter screen is two, desulfurization moisture absorption strong brine overflow salt supplementing pond with be provided with two between the desulfurization moisture absorption strong brine sedimentation tank and two the draw-in groove of static pressure infiltration filter screen one-to-one, the card of static pressure infiltration filter screen is established correspondingly on the draw-in groove.
Compared with the prior art, the invention has the following technical effects:
the boiler flue gas purification waste heat utilization system with the concentration function realizes concentration and recycling of salt solution in the flue gas purification process. The boiler flue gas purification waste heat utilization system with the concentration function adopts hygroscopic alkali liquor to be in wet contact with flue gas, the flue gas is subjected to desulfurization and denitrification, meanwhile, partial water is absorbed and dried, strong salt liquor and dilute salt liquor are the hygroscopic alkali liquor, the salt liquor absorbs sulfur oxides and nitrogen oxides and then reacts to form slightly soluble substances, the solution becomes dilute, water vapor condensed by the flue gas in a salt liquor concentration and regeneration device is separated out, and the solution is concentrated and regenerated. Meanwhile, boiler water feeding firstly cools the concentrated solution, then cools the concentrated solution to separate out condensation heat of water vapor, and finally exchanges heat with the flue gas in the flue gas-water heat exchanger to fully absorb waste heat in the flue gas and improve the boiler water feeding temperature. The purification problem of flue gas has effectively been solved to flue gas desulfurization denitration and dehydration and dust fall through basicity moisture absorption calcium ion class strong brine, utilizes salt solution enrichment facility to realize the concentrated regeneration of weak salt solution, the slightly soluble deposit of SOx/NOx control with higher speed and dust subside, preheats the boiler water-feeding through tertiary step heat transfer make full use of flue gas waste heat, reduces the heat loss of discharging fume. The system has the advantages that three functions of flue gas purification, concentration, precipitation and separation of desulfurization and denitrification products and flue gas waste heat utilization and boiler exhaust gas heat loss reduction are realized, the comprehensive investment of flue gas purification and waste heat utilization equipment is reduced, and good energy-saving and emission-reduction benefits are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a boiler flue gas purification waste heat utilization system with a concentration function according to the present invention;
FIG. 2 is a schematic structural diagram of a salt solution concentrating and regenerating device in the boiler flue gas purification waste heat utilization system with a concentrating function according to the present invention;
wherein: 100. a boiler flue gas purification waste heat utilization system with a concentration function; 1. a wet-type desulfurization and moisture absorption spray flue gas-salt solution heat exchange device; 2. a desulfurization and moisture absorption dilute salt solution pool; 3. a dilute brine booster pump; 4. a salt solution concentration and regeneration device; 5. a desulfurization and moisture absorption strong brine sedimentation tank; 6. the desulfurization and moisture absorption strong brine overflows a salt supplementing pool; 7. a desulfurization and moisture absorption strong brine spray pump; 8. a salt liquid-water heat exchanger; 9. a softened water pressure pump for recovering flue gas waste heat; 10. the flue gas waste heat directly exchanges heat to recover a flue gas-water heat exchanger; 11. a boiler; 12. a chimney; 13. a dilute salt solution filtering device; 14. a dilute salt solution negative pressure flash vaporization concentration tank; 15. a dilute salt liquid spraying and atomizing device; 16. a liquid baffle; 17. a flash steam outlet pipe of the concentration tank; 18. a jet nozzle; 19. a water jet injection booster pump; 20. condensing and evaporating vapor, cooling and storing water in a tank; 21. static pressure permeates the filter screen; 22. a card slot; 23. a softened water tank; 24. a water supply tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a boiler flue gas purification waste heat utilization system with a concentration function, which is used for solving the problems in the prior art and realizing the recycling of salt liquid in the flue gas waste heat utilization and purification processes.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 2: the embodiment provides a boiler flue gas purification waste heat utilization system 100 with a concentration function, which comprises a wet desulfurization moisture absorption spray flue gas-salt solution heat exchange device 1, a flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger 10 and a salt solution concentration regeneration device 4.
Wherein, the air inlet of the wet-type desulfurization moisture absorption spray flue gas-salt liquid heat exchange device 1 is communicated with the flue gas outlet of the boiler 11 through a pipeline, the air outlet of the wet-type desulfurization moisture absorption spray flue gas-salt liquid heat exchange device 1 is communicated with the air inlet of the flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger 10 through a pipeline, and the air outlet of the flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger 10 is communicated with the air inlet of the chimney 12 through a pipeline.
The liquid outlet of the wet-type desulfurization moisture absorption spray flue gas-salt solution heat exchange device 1 is communicated to a desulfurization moisture absorption dilute salt solution pool 2 through a pipeline, the desulfurization moisture absorption dilute salt solution pool 2 is communicated with a salt solution concentration regeneration device 4 through a dilute salt solution pipe, and a pressure pump and a dilute salt solution filtering device 13 are arranged on the dilute salt solution pipe.
The liquid outlet of concentrated regenerating unit 4 of salt solution communicates to desulfurization moisture absorption strong brine sedimentation tank 5 through the pipeline, and desulfurization moisture absorption strong brine overflow is mended salt pond 6 and is separated by with desulfurization moisture absorption strong brine sedimentation tank 5 through static pressure infiltration filter screen 21, and concentrated solution in the desulfurization moisture absorption strong brine sedimentation tank 5 can be mended salt pond 6 with static pressure infiltration filter screen 21 overflow to desulfurization moisture absorption strong brine overflow.
The desulfurization and moisture absorption strong brine overflow salt supplementing pool 6 is communicated with a liquid inlet of the salt liquid-water heat exchanger 8 through a strong brine pipe, and a liquid outlet of the salt liquid-water heat exchanger 8 is communicated with a liquid inlet of the wet desulfurization and moisture absorption spraying flue gas-salt liquid heat exchange device 1 through a pipeline.
The salt solution concentration and regeneration device 4 can concentrate the dilute salt solution generated in the wet-type desulfurization moisture absorption spraying flue gas-salt solution heat exchange device 1 to form a strong salt solution, and the strong salt solution is supplied to the wet-type desulfurization moisture absorption spraying flue gas-salt solution heat exchange device 1 for spraying. The salt solution concentration and regeneration device 4 comprises a dilute salt solution negative pressure flash evaporation and gasification concentration tank 14 and a concentration evaporation steam condensation cooling and water storage tank 20, a dilute salt solution spraying and atomizing device 15 is arranged in the middle of the dilute salt solution negative pressure flash evaporation and gasification concentration tank 14, a liquid baffle plate 16 is arranged at the top of the dilute salt solution negative pressure flash evaporation and gasification concentration tank, one end of the dilute salt solution pipe, which is far away from the desulfurization and moisture absorption dilute salt solution pool 2, is communicated with a liquid inlet of the dilute salt solution spraying and atomizing device 15, a concentrated salt solution discharge pipe and a cleaning solution discharge pipe are arranged at the bottom end of the dilute salt solution negative pressure flash evaporation and gasification concentration tank 14, the top end of the dilute salt solution negative pressure flash evaporation and gasification concentration tank 14 is communicated with a gas inlet of a jet pipe 18 through a steam outlet pipe, a water outlet of the jet pipe 18 is communicated with a feed inlet of the concentration evaporation steam condensation cooling and water storage tank 20, and a cleaning water discharge pipe is further arranged on the concentration evaporation steam condensation cooling and water storage tank 20.
The concentrated and evaporated steam condensing, cooling and water storage tank 20 is internally provided with a heat exchange coil, a water inlet of the flue gas waste heat direct heat exchange and recovery flue gas-water heat exchanger 10 is communicated with a water outlet of a softened water tank 23 of the boiler 11, a water outlet of the flue gas waste heat direct heat exchange and recovery flue gas-water heat exchanger 10 is communicated with a water inlet of the salt liquid-water heat exchanger 8, a water outlet of the salt liquid-water heat exchanger 8 is communicated with a water inlet of the heat exchange coil, and a water outlet of the heat exchange coil is communicated with a water feeding pipe of the boiler 11.
The bottom end of the condensed and evaporated steam condensation and cooling and water storage tank 20 is also communicated with the feed inlet of the jet flow spray pipe 18 through a water return pipe, and a water jet flow jet pressure pump 19 is arranged on the water return pipe.
The static pressure infiltration filter screen 21 in the boiler gas cleaning waste heat utilization system 100 that this embodiment has concentrated function is two, is provided with two draw-in grooves 22 with two static pressure infiltration filter screens 21 one-to-one between desulfurization moisture absorption strong brine overflow salt supplementing pond 6 and desulfurization moisture absorption strong brine sedimentation tank 5, and the static pressure infiltration filter screen card is established on corresponding draw-in groove 22.
The working process of the boiler flue gas purification waste heat utilization system 100 with the concentration function in the embodiment is as follows:
(1) the process of flue gas purification and dehydration and waste heat release comprises the following steps: the boiler 11 burns fuel to release heat to heat a heating medium, the generated gas product smoke flows out of the boiler 11 and enters the wet-type desulfurization and moisture absorption spray smoke-salt solution heat exchange device 1, the smoke is fully contacted with spray desulfurization and moisture absorption salt solution with lower temperature, sulfur oxides and nitrogen oxides in the smoke are efficiently absorbed by the spray desulfurization and moisture absorption salt solution, part of steam is absorbed and condensed by the spray desulfurization and moisture absorption salt solution, most of dust is captured by the spray desulfurization and moisture absorption salt solution, the smoke also releases part of heat to the spray desulfurization and moisture absorption salt solution, the smoke is purified, dried and cooled and then flows into smoke waste heat to directly exchange heat to recover the smoke-water heat exchanger 10, the smoke exchanges heat with softened water of the boiler 11, the temperature of the smoke is reduced again and kept at a certain temperature, and the smoke with a certain temperature is diffused and discharged to the high-altitude atmosphere through the chimney 12.
(2) The concentration process of the wet desulfurization hygroscopic salt solution comprises the following steps: in a wet-type desulfurization and moisture absorption spray flue gas-salt solution heat exchange device 1, a desulfurization and moisture absorption strong salt solution with lower temperature sprays and absorbs oxysulfide, nitric oxide, dust and part of water vapor in flue gas, the solution becomes thin, absorbs part of heat in the flue gas, the temperature rises, the solution flows into a desulfurization and moisture absorption dilute salt solution pool 2, is pressurized by a dilute salt solution pressure pump 3, passes through a dilute salt solution filtering device 13, is filtered to remove impurities such as solid particle dust and the like, then enters a salt solution concentration and regeneration device 4, the dilute salt solution is gasified at low pressure in a concentrated solution regeneration device to separate out water vapor, the salt solution is concentrated, the concentration of the dust and the slightly soluble substance is increased, the dust and the slightly soluble substance flow to a desulfurization and moisture absorption strong salt solution sedimentation tank 5, the slightly soluble substance and the dust are precipitated, the concentrated solution overflows to a desulfurization and moisture absorption strong salt solution overflow salt solution supplement tank 6 through a concentrated salt solution and crystal and dust blocking static pressure permeation filter screen 21, is pressurized by a desulfurization and strong salt solution spray pump 7 and passes through a salt solution-water heat exchanger 8, the temperature of the heat exchange salt solution is reduced, and the heat exchange salt solution enters the wet-type desulfurization and moisture absorption spraying flue gas-salt solution heat exchange device 1 to purify flue gas and absorb the waste heat of the flue gas. During the operation static pressure infiltration filter screen 21 is blockked up by slightly soluble thing, crystal and dust easily, when the resistance is great, takes out a static pressure infiltration filter screen 21 in the draw-in groove 22, washs with compressed air or high-pressure squirt, and draw-in groove 22 is put into again to the filter screen check after the washing, then takes out another static pressure infiltration filter screen 21, washs with compressed air or high-pressure squirt equally, and draw-in groove 22 is put into again to the filter screen check after the washing, effectively avoids sediment or dust to block up.
(3) The flue gas waste heat utilization process comprises the following steps: in order to improve the thermal efficiency of the boiler 11, the waste heat of the boiler 11 is used for preheating the water supply of the boiler 11, and the waste heat of the purified salt solution and the waste heat of the purified flue gas are used for heating in the embodiment, so that the functions of flue gas purification, salt solution concentration, regeneration, cyclic utilization and flue gas drying are realized. Softened water in a softened water tank 23 of a boiler 11 is pressurized by a softened water pressurizing pump 9 for recycling flue gas waste heat, enters a flue gas waste heat direct heat exchange recycling flue gas-water heat exchanger 10 to exchange heat with flue gas, the flue gas waste heat is fully absorbed, the supply water temperature of the softened water of the boiler 11 is increased, then the softened water exchanges heat with strong brine pressurized and supplied by a desulfurization and moisture absorption strong brine spray pump 7 in a salt liquid-water heat exchanger 8, the temperature of the strong brine is reduced, the strong brine enters a wet desulfurization and moisture absorption spray flue gas-salt liquid heat exchange device 1 to purify flue gas again to absorb waste heat, the temperature of the softened water rises, and finally the concentrated and evaporated steam entering a salt liquid concentration and regeneration device 4 is condensed and cooled and stored in a water tank 20 to absorb the condensation heat of the steam, the temperature of the softened water rises again and is supplied to the water tank 24 of the boiler 11 or the boiler 11, so that the high-efficiency recycling of the flue gas waste heat is realized.
(4) The process flow of the concentration of the dilute salt solution for flue gas desulfurization comprises the following steps: the concentrated brine is sprayed and contacted with the flue gas to absorb oxysulfide, nitric oxide, dust and partial steam in the flue gas to be diluted brine, the diluted brine is pressurized by a diluted brine pump, filtered and purified by a diluted brine filtering device 13 and enters a diluted brine negative pressure flash gasification concentration tank 14, the diluted brine is sprayed and atomized by an atomization device 15 in the diluted brine negative pressure flash gasification concentration tank 14 to be flash gasified under negative pressure, the diluted brine is concentrated, the steam is separated from the brine and the steam by a liquid baffle plate 16, the steam is sucked by a flash steam outlet pipe 17 of the concentration tank under negative pressure by a jet spray pipe 18 to be mixed and condensed with jet water, the discharged heat is increased in temperature and diffused and then sent to a concentration evaporation steam condensation cooling and water storage tank 20, in order to avoid the continuous increase of the temperature and influence on the jet performance, a heat exchange coil is arranged in the concentration evaporation steam condensation cooling and water storage tank 20, softened water from a brine-water heat exchanger 8 is used as cooling water, softened water in the heat exchange coil is subjected to heat exchange, the temperature of the softened water is increased, the softened water is sent into a water feeding pipe of a boiler 11, the temperature of the condensed and evaporated water vapor and mixed water in a water storage tank 20 is reduced, one part of the condensed and evaporated water vapor flows out of the tank body through an overflow pipe and is used as other water sources, the other part of the condensed and evaporated water vapor is pressurized by a water jet injection pressurizing pump 19 and is sent into a jet flow spray pipe 18 to be used as a working medium for generating negative pressure by jet flow, salt liquid concentration flash steam generated by a dilute salt liquid negative pressure flash evaporation and gasification concentration tank 14 is continuously sucked, and the concentration and continuous operation of the flue gas desulfurization dilute salt liquid are ensured.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. The utility model provides a boiler gas cleaning waste heat utilization system with concentrated function which characterized in that: the system comprises a wet-type desulfurization and moisture absorption spray flue gas-salt solution heat exchange device, a flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger and a salt solution concentration regeneration device, wherein the air inlet of the wet-type desulfurization and moisture absorption spray flue gas-salt solution heat exchange device is communicated with the flue gas outlet of a boiler, the air outlet of the wet-type desulfurization and moisture absorption spray flue gas-salt solution heat exchange device is communicated with the air inlet of the flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger, and the air outlet of the flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger is communicated with the air inlet of a chimney;
the salt solution concentration and regeneration device can concentrate the dilute salt solution generated in the wet-type desulfurization and moisture absorption spraying flue gas-salt solution heat exchange device to form a strong salt solution, and the strong salt solution is supplied to the wet-type desulfurization and moisture absorption spraying flue gas-salt solution heat exchange device for spraying.
2. The boiler flue gas purification waste heat utilization system with the concentration function according to claim 1, characterized in that: the liquid outlet of the wet-type desulfurization moisture absorption spraying flue gas-salt solution heat exchange device is communicated to a desulfurization moisture absorption dilute salt solution pool, the desulfurization moisture absorption dilute salt solution pool is communicated with the salt solution concentration regeneration device through a dilute salt solution pipe, and a pressure pump and a dilute salt solution filtering device are arranged on the dilute salt solution pipe.
3. The boiler flue gas purification waste heat utilization system with the concentration function according to claim 2, characterized in that: the liquid outlet of salt solution concentration and regeneration device communicates to desulfurization moisture absorption strong brine sedimentation tank, desulfurization moisture absorption strong brine overflow mend the salt pond through static pressure infiltration filter screen with desulfurization moisture absorption strong brine sedimentation tank is separated by, concentrated solution in the desulfurization moisture absorption strong brine sedimentation tank can with static pressure infiltration filter screen overflow extremely desulfurization moisture absorption strong brine overflow mends the salt pond.
4. The boiler flue gas purification waste heat utilization system with the concentration function according to claim 3, characterized in that: the desulfurization moisture absorption strong brine overflow salt supplementing pool is communicated with a liquid inlet of the salt liquid-water heat exchanger through a strong brine pipe, and a liquid outlet of the salt liquid-water heat exchanger is communicated with a liquid inlet of the wet desulfurization moisture absorption spraying flue gas-salt liquid heat exchange device.
5. The boiler flue gas purification waste heat utilization system with the concentration function according to claim 4, characterized in that: the salt solution concentration and regeneration device comprises a dilute salt solution negative pressure flash vaporization concentration tank and a concentration evaporation steam condensation cooling and water storage tank, the middle part of the dilute salt liquid negative pressure flash gasification concentration tank is provided with a dilute salt liquid spraying atomization device, the top part is provided with a liquid baffle plate, one end of the dilute brine pipe, which is far away from the desulfurization and moisture absorption dilute brine tank, is communicated with a liquid inlet of the dilute brine spraying and atomizing device, the bottom end of the dilute salt solution negative pressure flash gasification concentration tank is provided with a strong salt solution discharge pipe and a decontamination solution discharge pipe, the top end of the dilute salt liquid negative pressure flash vaporization concentration tank is communicated with the air inlet of the jet flow spray pipe through a steam outlet pipe, the water outlet of the jet flow spray pipe is communicated with the feed inlet of the condensed and evaporated steam condensing, cooling and water storage tank, and a clear water discharge pipe is further arranged on the condensed and evaporated steam condensing, cooling and water storage tank.
6. The boiler flue gas purification waste heat utilization system with the concentration function according to claim 5, characterized in that: the concentrated and evaporated steam condensing, cooling and water storage tank is internally provided with a heat exchange coil, the water inlet of the flue gas waste heat direct heat exchange and recovery flue gas-water heat exchanger is communicated with the water outlet of the softened water tank of the boiler, the water outlet of the flue gas waste heat direct heat exchange and recovery flue gas-water heat exchanger is communicated with the water inlet of the salt solution-water heat exchanger, the water outlet of the salt solution-water heat exchanger is communicated with the water inlet of the heat exchange coil, and the water outlet of the heat exchange coil is communicated with the water feeding pipe of the boiler.
7. The boiler flue gas purification waste heat utilization system with the concentration function according to claim 5, characterized in that: the bottom end of the concentration evaporation steam condensation cooling and water storage tank is communicated with the feed inlet of the jet flow spray pipe through a water return pipe, and a water jet injection pressure pump is arranged on the water return pipe.
8. The boiler flue gas purification waste heat utilization system with the concentration function according to claim 3, characterized in that: the static pressure infiltration filter screen is two, the salt pond is mended in desulfurization moisture absorption strong brine overflow with be provided with two and two between the desulfurization moisture absorption strong brine sedimentation tank the draw-in groove of static pressure infiltration filter screen one-to-one, the card of static pressure infiltration filter screen is established correspondingly on the draw-in groove.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1844842A2 (en) * | 2006-04-13 | 2007-10-17 | The Babcock & Wilcox Company | Process for controlling the moisture concentration of a combustion flue gas |
| CN101716458A (en) * | 2010-01-14 | 2010-06-02 | 中电投远达环保工程有限公司 | System for trapping carbon dioxide in flue gas of coal-fired power plant and corresponding treatment method |
| CN102650431A (en) * | 2011-02-26 | 2012-08-29 | 刘长征 | Stepped recycle method for residual heat of fuel gas |
| EP2898939A1 (en) * | 2012-09-20 | 2015-07-29 | Mitsubishi Hitachi Power Systems, Ltd. | Flue gas treatment method and flue gas treatment device |
| CN104930539A (en) * | 2015-06-29 | 2015-09-23 | 山东大学 | Coal-fired power plant flue gas heat regenerative system and energy-saving water-saving ultra-clean discharging method |
| CN105909330A (en) * | 2016-04-14 | 2016-08-31 | 东南大学 | Flue gas waste heat recovery and flue gas processing system based on organic Rankine cycle |
| CN106268198A (en) * | 2016-07-27 | 2017-01-04 | 山东大学 | A kind of desulfurization fume dehumidifying and water reclamation system and method |
| CN110394031A (en) * | 2019-07-10 | 2019-11-01 | 中国华电科工集团有限公司 | A kind of waste heat recycles the device for the white joint Waste water concentrating that disappears |
| CN211035580U (en) * | 2019-10-28 | 2020-07-17 | 中国华电科工集团有限公司 | Low-temperature flue gas heating wastewater concentration system |
| CN111482057A (en) * | 2019-01-28 | 2020-08-04 | 中国华电科工集团有限公司 | Combined desulfurization and whitening device |
| CN213375881U (en) * | 2020-09-01 | 2021-06-08 | 清大中能(天津)环保科技有限公司 | Flue gas purification and waste heat recovery system based on calcium chloride solution |
-
2021
- 2021-06-22 CN CN202110690871.0A patent/CN113230851B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1844842A2 (en) * | 2006-04-13 | 2007-10-17 | The Babcock & Wilcox Company | Process for controlling the moisture concentration of a combustion flue gas |
| CN101716458A (en) * | 2010-01-14 | 2010-06-02 | 中电投远达环保工程有限公司 | System for trapping carbon dioxide in flue gas of coal-fired power plant and corresponding treatment method |
| CN102650431A (en) * | 2011-02-26 | 2012-08-29 | 刘长征 | Stepped recycle method for residual heat of fuel gas |
| EP2898939A1 (en) * | 2012-09-20 | 2015-07-29 | Mitsubishi Hitachi Power Systems, Ltd. | Flue gas treatment method and flue gas treatment device |
| CN104930539A (en) * | 2015-06-29 | 2015-09-23 | 山东大学 | Coal-fired power plant flue gas heat regenerative system and energy-saving water-saving ultra-clean discharging method |
| CN105909330A (en) * | 2016-04-14 | 2016-08-31 | 东南大学 | Flue gas waste heat recovery and flue gas processing system based on organic Rankine cycle |
| CN106268198A (en) * | 2016-07-27 | 2017-01-04 | 山东大学 | A kind of desulfurization fume dehumidifying and water reclamation system and method |
| CN111482057A (en) * | 2019-01-28 | 2020-08-04 | 中国华电科工集团有限公司 | Combined desulfurization and whitening device |
| CN110394031A (en) * | 2019-07-10 | 2019-11-01 | 中国华电科工集团有限公司 | A kind of waste heat recycles the device for the white joint Waste water concentrating that disappears |
| CN211035580U (en) * | 2019-10-28 | 2020-07-17 | 中国华电科工集团有限公司 | Low-temperature flue gas heating wastewater concentration system |
| CN213375881U (en) * | 2020-09-01 | 2021-06-08 | 清大中能(天津)环保科技有限公司 | Flue gas purification and waste heat recovery system based on calcium chloride solution |
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