CN111362342A - Wastewater zero discharge system and method for multi-stage treatment - Google Patents
Wastewater zero discharge system and method for multi-stage treatment Download PDFInfo
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- CN111362342A CN111362342A CN202010330403.8A CN202010330403A CN111362342A CN 111362342 A CN111362342 A CN 111362342A CN 202010330403 A CN202010330403 A CN 202010330403A CN 111362342 A CN111362342 A CN 111362342A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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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
- B01D53/78—Liquid phase processes with gas-liquid contact
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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
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray 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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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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
- 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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Abstract
The invention provides a multi-stage treatment wastewater zero discharge system and a multi-stage treatment wastewater zero discharge method, wherein the system comprises a boiler, a denitration system, a dry flue gas system, a desulfurization system, a wastewater conveying system, a wastewater concentration system, a wastewater spray evaporation system and a concentrated flue gas system, wherein the boiler, the denitration system, the dry flue gas system, the desulfurization system, the wastewater conveying system, the wastewater concentration system and the wastewater spray evaporation system are sequentially connected, the wastewater concentration system is connected with the desulfurization system through the concentrated flue gas system, and the wastewater spray evaporation system is also connected with the dry flue gas system. The wastewater zero discharge process for multistage treatment of the invention secondarily utilizes the waste heat of the system, reduces the operation energy consumption and realizes efficient and stable desulfurization wastewater zero discharge.
Description
Technical Field
The invention relates to the technical field of waste water treatment in a flue gas wet desulphurization process, in particular to a multi-stage treatment waste water zero discharge system.
Background
At present, limestone-gypsum wet desulphurization has about 85 percent of market share in the field of flue gas desulphurization of thermal power plants in China. The byproducts of the wet desulphurization process comprise gypsum and desulphurization waste water, and the regular discharge of the slurry in the desulphurization absorption tower is used for controlling the concentration of harmful elements such as Cl-, F, heavy metals and the like in limestone slurry in the desulphurization absorption tower, which cause the reduction of the reaction capability of the slurry, reducing the concentration of fine dust particles in the slurry and ensuring the normal and stable operation of a desulphurization system.
With the increasingly strict environmental protection requirements of China, the method is proposed in technical regulations for wastewater treatment design of thermal power plants issued in 2006: the desulfurization wastewater of the thermal power plant needs to be separately provided with a treatment facility, treatment and recycling are preferentially considered, no discharge port is arranged, and zero discharge of the wastewater must be realized.
In the Water Ten items published in 2015, the state strengthens the treatment strength of various water pollutions, the pressure of a thermal power plant in the aspects of resource constraint and discharge limitation is increased suddenly, and the achievement of deep water conservation and zero discharge of waste water and sewage is inevitably selected.
The traditional desulfurization wastewater treatment process is triple-box treatment, namely, the solid content and the salt content of wastewater are reduced through the processes of wastewater neutralization, coagulation and precipitation, but the technology cannot achieve the purpose of zero wastewater discharge. In order to further meet the environmental protection requirement of zero discharge of wastewater, the evaporation tank, the multi-stage waste heat flash evaporation self-crystallization and the traditional flue evaporation process are gradually applied to the field of zero discharge of desulfurization wastewater. However, each technology still has certain defects in application, and the application of the evaporation pool technology is limited by regions and climate; the multistage waste heat flash evaporation self-crystallization technology has complex process flow and large operation and maintenance workload, generates a large amount of sludge byproducts and is difficult to treat; the traditional flue evaporation technology has low investment and operation cost, but is obviously influenced by boiler load, and is very easy to generate structural blockage, thereby influencing the safe operation of a unit.
The bypass high-temperature flue gas evaporation drying technology is a mature wastewater zero-discharge process in recent years, and has the advantages of wide application range and low operation cost. However, in the existing bypass high-temperature flue gas evaporation drying technology, high-temperature flue gas behind the denitration device and in front of the air preheater device is directly used as heat source evaporation flue gas, and although the waste water can be thoroughly evaporated, the heat consumption is high, and the operation cost of the desulfurization system is greatly increased.
The membrane concentration technology is a novel desulfurization wastewater concentration technology in recent years, clear liquid passing through a membrane concentration system has better water quality, more recycling ways are provided, the volume of concentrated solution is reduced, and the salt concentration is increased. When the desulfurization wastewater is concentrated by adopting the filtering membrane, the salt content of the desulfurization wastewater is high, the water quality and impurities are more, the filtering membrane is frequently blocked, and part of impurities in the desulfurization wastewater easily cause membrane poisoning, the membrane needs to be frequently replaced during operation, the cost of the filtering membrane is higher, and the concentration operation cost is higher; and the membrane concentration technology needs a water pump to provide filtration pressure difference, the filtration pressure difference is large, the pump power is high, and the economic efficiency of a membrane concentration system is low.
Disclosure of Invention
The invention provides a wastewater zero discharge system for multi-stage treatment, which adopts the specific technical scheme that:
comprises a boiler, a denitration system, a dry flue gas system, a desulfurization system, a wastewater conveying system, a wastewater concentration system, a wastewater spray evaporation system and a concentrated flue gas system, wherein the boiler, the denitration system, the dry flue gas system, the desulfurization system, the wastewater conveying system, the wastewater concentration system and the wastewater spray evaporation system are sequentially connected, the wastewater concentration system is connected with the desulfurization system through the concentrated flue gas system, the wastewater spray evaporation system is connected with the dry flue gas system through a bypass pipeline, wherein,
the denitration system comprises a denitration device;
the drying flue gas system comprises an air preheater, a dust remover and an induced draft fan;
the waste water conveying system comprises a waste water tank and a waste water conveying pump;
the wastewater concentration system comprises a concentrator, a wastewater circulating pump and a thick slurry pump;
the waste water spray evaporation system comprises a dosing system, a spray evaporation tower and a high-speed centrifugal atomizer;
the concentrated flue gas system is a flue gas bypass comprising a variable-frequency booster fan;
further, an air preheater, a dust remover and an induced draft fan of the dry flue gas system are sequentially connected, the air preheater is connected with the denitration system, and the induced draft fan is respectively connected with the desulfurization system and the wastewater concentration system;
further, a stirrer is arranged in a wastewater tank in the wastewater conveying system;
further, in the wastewater concentration system, a concentrator is connected with a thick slurry pump, the thick slurry pump is connected with a wastewater spray evaporation system, and a circulating pump is arranged on the concentrator;
furthermore, in the wastewater spray evaporation system, a dosing system is arranged at the top of the spray evaporation tower and is connected with a thick slurry pump in the wastewater concentration system, and a high-speed centrifugal atomizer is arranged at the upper part in the spray evaporation tower;
further, the dust remover is provided with an ash bucket;
further, a spraying evaporation chamber is arranged in the concentrator;
further, the high-speed centrifugal atomizer comprises n nozzles (n is more than or equal to 2), and the nozzles are distributed in an umbrella shape;
further, the desulfurization system comprises a desulfurization tower.
The flue gas with waste heat behind the draught fan of the unit is used for carrying out concentration pretreatment on the desulfurization wastewater,
the water pump in the concentration system in which water and gas are directly contacted only needs to atomize and spray the desulfurization wastewater,
a wastewater zero discharge method of multi-stage treatment comprises the following steps:
step one, enabling desulfurization waste water to enter a concentrator of a waste water concentration system from top to bottom, leading waste heat-containing flue gas in a flue behind an induced draft fan and in front of a desulfurization tower out to a bypass, enabling the waste heat-containing flue gas to enter the concentrator of the waste water concentration system from bottom to top, enabling the waste heat-containing flue gas to be in direct contact with the desulfurization waste water for heat exchange, and enabling the waste heat-containing flue gas to be connected back to the flue in front of the desulfurization tower and enter the desulfurization tower;
step two, the desulfurization waste water is concentrated to a saturated or supersaturated state and then is sent into a spray evaporation tower of a waste water spray evaporation system,
step three, the waste heat-containing flue gas is led out to a bypass after the self-denitrification device and before the air preheater, enters a spray evaporation tower of a waste water spray evaporation system, the desulfurization waste water is dried, the waste heat-containing flue gas is connected back to the back of the air preheater and the front flue of a dust remover,
and step four, the dry product of the desulfurization wastewater enters a dust remover along with the flue gas, and enters an ash hopper of the dust remover after being collected.
The invention has the following beneficial effects:
(1) the flue gas with waste heat behind a unit induced draft fan is used for carrying out concentration pretreatment on the desulfurization wastewater, the unit waste heat is effectively utilized, the flue gas carrying the waste heat enters a spray evaporation chamber of a concentrator 10 and directly contacts with atomized wastewater for heat exchange, the temperature of the flue gas is reduced to about 50 ℃, saturated wet flue gas carrying water vapor returns to a desulfurization system again, water vapor in the desulfurization wastewater is evaporated, the volume is concentrated by 5-6 times, the concentration of the wastewater is gradually close to a saturated or supersaturated state, and the wastewater treatment capacity of a spray evaporation tower 15 is greatly reduced;
(2) the concentrator 10 adopting direct contact heat exchange of water and gas has lower operating cost than the membrane concentration technology, a water pump needs to provide pressure to overcome membrane filtration resistance when membrane concentration is adopted, the pressure is higher, a water pump in a concentration system adopting direct contact of water and gas only needs to atomize and spray the desulfurization wastewater, and the energy consumption of the pump is lower; the membrane concentration is easy to cause membrane blockage or membrane poisoning, the filtering membrane as an operation consumable needs to be replaced in the operation process, so that the operation consumption is increased, the operation labor cost is increased, the water and gas directly contact with the heat exchange concentrator without consumables, manual operation is not needed, and the operation cost is greatly reduced;
(3) the spray evaporation tower 15 and the concentrator 10 are independently arranged outside the unit system, concentrated flue gas and dry flue gas are led out by the unit flue gas system, stable operation of a boiler system and a flue gas purification system is not affected, and reliability is high. The flue gas contacts with the desulfurization waste water only in the concentrator 10 and the spray evaporation tower 15, the concentrated flue gas is prevented from carrying droplets of the desulfurization waste water by a demister when leaving the concentrator 10, the desulfurization waste water is dried into gypsum, other inorganic salts and other powdery substances when the dried flue gas leaves the spray evaporation tower 15, and the powdery substances flow back to a front flue of the dust remover 4 along with the high-speed vortex of the flue gas at the tower bottom, so that the safe and stable operation of a boiler and a flue gas purification system in a unit is ensured;
(4) the dryer which adopts the high-speed centrifugal atomizer 14 for desulfurization wastewater distribution has more stable wastewater distribution capability, because the concentrated desulfurization waste water is in a saturated or supersaturated state, scaling and blockage are easy to occur on a dry-wet interface when spray atomization is carried out by a spray gun, the atomization spray range cannot be ensured to be stable after operation for a period of time, the heat exchange efficiency is reduced, high-speed centrifugal atomization is carried out, 14, liquid is centrifugally atomized by using high-speed centrifugal force without being influenced by bad water quality, and has no blockage problem, and the centrifugal atomization can adjust a stable droplet divergence umbrella-shaped radius area according to the rotating speed, the radius of the spray evaporation tower 15 can be designed to be larger than the dispersion radius of the atomized liquid drops, so that the desulfurization wastewater droplets are completely dried before reaching the tower wall of the absorption tower, the problems of 'wall wetting' and scaling, corrosion and the like in the spray evaporation tower 15 are solved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic flow chart of the present invention.
In the figure: 1-a boiler; 2-a denitration device; 3-an air preheater; 4-a dust remover; 5-a draught fan; 6-a desulfurizing tower; 7-a stirrer; 8-a wastewater tank; 9-a wastewater delivery pump; 10-a concentrator; 11-a wastewater circulating pump; 12-a underflow pump; 13-a dosing system; 14-high speed centrifugal atomizer; 15 spray evaporation tower; 16-a variable frequency booster fan; 20-a wastewater delivery system; 21-a wastewater concentration system; 22-waste water spray evaporation system.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 2, the multi-stage wastewater zero discharge system of the present invention includes a boiler, a denitration system, a dry flue gas system, a desulfurization system, a wastewater delivery system, a wastewater concentration system, a wastewater spray evaporation system, and a concentrated flue gas system, wherein the boiler, the denitration system, the dry flue gas system, the desulfurization system, the wastewater delivery system, the wastewater concentration system, and the wastewater spray evaporation system are sequentially connected, the wastewater concentration system is connected to the desulfurization system through the concentrated flue gas system, and the wastewater spray evaporation system is further connected to the dry flue gas system.
The specific operation principle and steps of the invention are as follows:
desulfurization wastewater enters a concentrator 10 through a wastewater conveying system 20, is forcibly circulated and atomized in a spraying evaporation chamber by a wastewater circulating pump 11, and atomized wastewater liquid flows from top to bottom; the flue gas containing waste heat is extracted from a rear flue of a draught fan of the unit by a variable frequency booster fan 16 and is sent into a spray evaporation chamber of the concentrator 10, the flow direction of the flue gas is from bottom to top, the waste water and the flue gas containing waste heat are directly contacted for heat exchange, the flue gas returns to a desulfurization system after demisting from the top of the concentrator 10, and the waste water is concentrated to a saturated or supersaturated state and then is sent into a spray evaporation tower 15 by a thick liquid pump 12 through a chemical adding system 13;
the flue leads the flue gas with the temperature of more than 100 ℃ out of the rear part of the induced draft fan 5 and the front part of the desulfurizing tower 6 to a bypass, the flue gas is dry flue gas with extremely low moisture content, the flue gas enters the concentrator 10 and is directly contacted with the flue gas, after the heat is absorbed by the waste water, the flue gas carries water vapor to reach a saturated state, the waste water is concentrated and then is mixed with the desulfurizing flue gas again, and the mixture enters the desulfurizing tower 6;
the flue gas sent out by the boiler 1 is led out to a bypass from the back of the denitration device 2 and the front of the air preheater 3, enters a spray evaporation tower 15, is dried and then is connected back to the back of the air preheater 3 and a front flue of the dust remover 4;
the concentrated wastewater is distributed and atomized by a high-speed centrifugal atomization device 14 and uniformly dispersed in a spray evaporation tower 15, and the particle size of fog drops is between 50 and 70 mu m and is in centrifugal scattering distribution; leading out the concentrated flue gas from the flue to a spray evaporation tower 15, rectifying the concentrated flue gas by a flue gas distributor, then leading the concentrated flue gas into the spray evaporation tower 15, drying the concentrated desulfurization wastewater into powder from top to bottom, and carrying the powder out of the spray evaporation tower;
the concentrated desulfurization wastewater dried product is carried into an air preheater 3 and a front flue of a dust remover 4 along with the flue gas after high-speed vortex at the tower bottom, is mixed with the flue gas and then enters the dust remover 4, and then enters an ash hopper of the dust remover 4 after being collected.
The invention has the advantages that the waste heat-containing flue gas is secondarily utilized to concentrate and dry the desulfurization waste water, thereby greatly reducing the heat consumption of the waste water spray evaporation system 22; meanwhile, the treatment capacity of the wastewater in the spray evaporation tower 15 is low, high-temperature evaporation is rapid, scaling is not easy, no dust is hardened in a flue, and the boiler 1 runs smoothly; and a system is not required to be separately arranged for dry product treatment. The invention greatly reduces the energy consumption and the operating cost of the system, does not influence the normal operation of the unit, and realizes the high-efficiency zero-discharge treatment of the desulfurization wastewater.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A wastewater zero discharge system with multi-stage treatment is characterized by comprising a boiler, a denitration system, a dry flue gas system, a desulfurization system, a wastewater conveying system, a wastewater concentration system and a wastewater spray evaporation system which are sequentially connected, wherein the wastewater concentration system is connected to the front end of the desulfurization system through the concentrated flue gas system, the wastewater spray evaporation system is connected with the dry flue gas system through a bypass pipeline, wherein,
the dry flue gas system comprises an air preheater, a dust remover and an induced draft fan which are connected in sequence;
the wastewater conveying system comprises a wastewater tank and a wastewater conveying pump;
the wastewater concentration system comprises a concentrator, a wastewater circulating pump and a thick slurry pump;
the wastewater spray evaporation system comprises a dosing system, a spray evaporation tower and a high-speed centrifugal atomizer;
the concentrated flue gas system is a flue gas bypass system comprising a variable-frequency booster fan.
2. The multi-stage treatment wastewater zero discharge system according to claim 1, wherein the air preheater is connected to the denitration system, and the induced draft fan is connected to the desulfurization system.
3. The multi-stage treatment wastewater zero discharge system of claim 1, wherein an agitator is provided in the wastewater tank in the wastewater delivery system.
4. The multi-stage treatment wastewater zero discharge system according to claim 1, wherein the concentrator is connected to a slurry pump, the slurry pump is connected to a wastewater spray evaporation system, and the circulating pump is disposed on the concentrator.
5. The multi-stage treatment wastewater zero discharge system according to claim 1, wherein the chemical feeding system is disposed on the top of the spray evaporation tower and connected to the slurry pump in the wastewater concentration system, and the high-speed centrifugal atomizer is installed at the upper part in the spray evaporation tower.
6. The multi-stage treatment wastewater zero discharge system according to claim 1, wherein the dust collector is provided with an ash hopper.
7. The multi-stage treatment wastewater zero discharge system according to claim 1 or 4, wherein a spray evaporation chamber is arranged in the concentrator.
8. The multi-stage treatment wastewater zero discharge system according to claim 1 or 5, wherein the high-speed centrifugal atomizer comprises n nozzles, n is greater than or equal to 2, and the nozzles are distributed in an umbrella shape.
9. The multi-stage treatment wastewater zero-discharge system of claim 1, wherein the desulfurization system comprises a desulfurization tower.
10. A wastewater zero discharge method of multi-stage treatment is characterized by comprising the following steps:
step one, enabling desulfurization waste water to enter a concentrator of a waste water concentration system from top to bottom, leading waste heat-containing flue gas in a flue behind an induced draft fan and in front of a desulfurization tower out to a bypass, enabling the waste heat-containing flue gas to enter the concentrator of the waste water concentration system from bottom to top, enabling the waste heat-containing flue gas to be in direct contact with the desulfurization waste water for heat exchange, and enabling the waste heat-containing flue gas to be connected back to the flue in front of the desulfurization tower and enter the desulfurization tower;
step two, the desulfurization waste water is concentrated to a saturated or supersaturated state and then is sent into a spray evaporation tower of a waste water spray evaporation system,
step three, the waste heat-containing flue gas is led out to a bypass after the self-denitrification device and before the air preheater, enters a spray evaporation tower of a waste water spray evaporation system, the desulfurization waste water is dried, the waste heat-containing flue gas is connected back to the back of the air preheater and the front flue of a dust remover,
and step four, the dry product of the desulfurization wastewater enters a dust remover along with the flue gas, and enters an ash hopper of the dust remover after being collected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911075316.6A CN110862118A (en) | 2019-11-06 | 2019-11-06 | Wastewater zero discharge system and method for multi-stage treatment |
| CN2019110753166 | 2019-11-06 |
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| CN111362342A true CN111362342A (en) | 2020-07-03 |
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| CN201911075316.6A Withdrawn CN110862118A (en) | 2019-11-06 | 2019-11-06 | Wastewater zero discharge system and method for multi-stage treatment |
| CN202010330403.8A Pending CN111362342A (en) | 2019-11-06 | 2020-04-24 | Wastewater zero discharge system and method for multi-stage treatment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112607945A (en) * | 2020-12-16 | 2021-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Desulfurization wastewater zero-discharge system and method based on high-temperature and low-temperature flue gas coupling treatment |
| CN112607943A (en) * | 2020-12-16 | 2021-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Coal-fired power plant desulfurization wastewater treatment system and method based on four-bin air preheater |
| CN112607944A (en) * | 2020-12-16 | 2021-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Coal-fired power plant desulfurization wastewater treatment system and method based on flue gas cooperative treatment |
| CN112624469A (en) * | 2020-12-16 | 2021-04-09 | 中国华能集团清洁能源技术研究院有限公司 | High-temperature flue gas-based single-stage desulfurization wastewater zero-discharge system and method |
| CN112624470A (en) * | 2020-12-16 | 2021-04-09 | 中国华能集团清洁能源技术研究院有限公司 | Desulfurization wastewater integrated treatment system and method based on high-temperature flue gas |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111320315A (en) * | 2020-03-11 | 2020-06-23 | 河北建投水务环境工程有限公司 | Desulfurization wastewater treatment system |
| CN112142143A (en) * | 2020-10-14 | 2020-12-29 | 南京依涛环保科技有限公司 | System and method for removing heavy metal and chloride ions in evaporative crystallization process of desulfurization wastewater |
| CN112607808A (en) * | 2020-12-01 | 2021-04-06 | 北京利德衡环保工程有限公司 | Two-stage desulfurization wastewater treatment process |
| CN114620791B (en) * | 2022-03-31 | 2023-04-25 | 西安交通大学 | System for concentrated desulfurization waste water of cascade utilization flue gas waste heat |
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| US20130248121A1 (en) * | 2011-03-24 | 2013-09-26 | Mitsubishi Heavy Industries, Ltd. | Spray-drying device for dehydrated filtrate from desulfurization wastewater, air pollution control system and flue gas treatment method |
| CN105481157A (en) * | 2015-12-18 | 2016-04-13 | 王辛平 | Method for zero emission treatment of desulfurization waste water based on flue gas waste heat evaporation |
| CN107973475A (en) * | 2017-12-27 | 2018-05-01 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater Zero discharging system and method based on waste heat reuse under running on the lower load |
| CN108328683A (en) * | 2017-01-19 | 2018-07-27 | 四川苏源环保工程有限公司 | Waste water of heat-engine plant condensing crystallizing Zero discharging system |
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2019
- 2019-11-06 CN CN201911075316.6A patent/CN110862118A/en not_active Withdrawn
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2020
- 2020-04-24 CN CN202010330403.8A patent/CN111362342A/en active Pending
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| CN112607945A (en) * | 2020-12-16 | 2021-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Desulfurization wastewater zero-discharge system and method based on high-temperature and low-temperature flue gas coupling treatment |
| CN112607943A (en) * | 2020-12-16 | 2021-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Coal-fired power plant desulfurization wastewater treatment system and method based on four-bin air preheater |
| CN112607944A (en) * | 2020-12-16 | 2021-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Coal-fired power plant desulfurization wastewater treatment system and method based on flue gas cooperative treatment |
| CN112624469A (en) * | 2020-12-16 | 2021-04-09 | 中国华能集团清洁能源技术研究院有限公司 | High-temperature flue gas-based single-stage desulfurization wastewater zero-discharge system and method |
| CN112624470A (en) * | 2020-12-16 | 2021-04-09 | 中国华能集团清洁能源技术研究院有限公司 | Desulfurization wastewater integrated treatment system and method based on high-temperature flue gas |
| CN112607943B (en) * | 2020-12-16 | 2023-04-18 | 中国华能集团清洁能源技术研究院有限公司 | Coal-fired power plant desulfurization wastewater treatment system and method based on four-bin air preheater |
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