CN210559480U - Waste water evaporation and concentration device based on low-temperature spray desulfurization - Google Patents
Waste water evaporation and concentration device based on low-temperature spray desulfurization Download PDFInfo
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- CN210559480U CN210559480U CN201921063205.9U CN201921063205U CN210559480U CN 210559480 U CN210559480 U CN 210559480U CN 201921063205 U CN201921063205 U CN 201921063205U CN 210559480 U CN210559480 U CN 210559480U
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Abstract
A waste water evaporation concentration device based on low-temperature spray desulfurization comprises a desulfurization waste water buffer system, an evaporation concentration system and a gas-liquid condensation system; the desulfurization wastewater buffer system comprises a buffer tank, a desulfurization wastewater incoming water pipeline and a desulfurization wastewater conveying pipeline; the evaporation concentration system comprises an evaporation tower, an atomization spraying device, a demister, a clear liquid circulating pipeline of desulfurization waste water, a heat exchanger and a heating medium circulating pipeline; the gas-liquid condensation system comprises an air circulation pipeline connected with the evaporation tower, a blower, an air condenser connected with the tail end of the air circulation pipeline, a cooling water circulation pipeline connected with the other side of the air condenser, and a mechanical ventilation cooling tower connected with the cooling water circulation pipeline. The utility model discloses guarantee that desulfurization waste water clear solution can evenly atomize, increase evaporation efficiency, desulfurization waste water concentration decrement, it can supply desulfurization and other power plant process water to separate out the comdenstion water. Can be widely applied to the field of desulfurization wastewater and industrial sewage treatment of thermal power plants.
Description
Technical Field
The invention relates to a waste water evaporation concentration device based on low-temperature spray desulfurization, which can be widely applied to the field of desulfurization waste water and industrial sewage treatment of a thermal power plant.
Background
The desulfurization wastewater of the coal-fired power plant contains a large amount of suspended solids, has high salt content and high hardness, contains more kinds of heavy metal ions, has serious pollution to the environment, is a pollutant which is strictly controlled in the national environmental protection standard, and is the tail-end wastewater which is difficult to treat in the thermal power plant at present. The conventional desulfurization wastewater treatment process completely evaporates desulfurization wastewater by using flue gas waste heat, sprays the concentrated desulfurization wastewater into a flue or a bypass flue through an atomizing nozzle or a rotary atomizer, heats and evaporates the atomized desulfurization wastewater through flue gas, separates out soluble salt crystals, and collects the dissolved salt crystals together with smoke dust in the flue gas by a dust remover. For the case of a 300MW unit with 10t/h of desulfurization wastewater, the total water evaporation can reduce the coal consumption of the boiler by about 0.3-1%, and the economy is poor, so that the desulfurization wastewater needs to be subjected to concentration and decrement pretreatment. The membrane concentration and decrement process is a conventional process, but the process needs pre-softening treatment on the desulfurization wastewater, has high cost and complex process, and in addition, the permeable membrane needs to be maintained and replaced regularly, so the membrane concentration and decrement process is suitable for scenes of large water quantity and treatment of wastewater of a whole plant, and has no universality aiming at treating the desulfurization wastewater.
Disclosure of Invention
The invention aims to provide a waste water evaporation concentration system and a waste water evaporation concentration process based on low-temperature spray desulfurization, which can ensure that the clear liquid of desulfurization waste water can be uniformly atomized, the evaporation efficiency is increased, the concentration and decrement of the desulfurization waste water are realized, and the precipitated condensed water can be used for desulfurization and other process water of power plants.
In order to achieve the aim, the waste water evaporation and concentration device based on low-temperature spray desulfurization comprises a desulfurization waste water buffer system, an evaporation and concentration system and a gas-liquid condensation system; the desulfurization wastewater buffer system comprises a buffer tank, a desulfurization wastewater water inlet pipeline connected with an inlet of the buffer tank, and a desulfurization wastewater conveying pipeline connected with an outlet of the buffer tank; the evaporation concentration system comprises an evaporation tower, an atomization spraying device, a demister, a desulfurization waste water clear liquid circulating pipeline, a heat exchanger and a heating medium circulating pipeline, wherein the outer lower part of the evaporation tower is connected with the desulfurization waste water conveying pipeline; the gas-liquid condensation system comprises an air circulation pipeline connected with the evaporation tower, a blower arranged on the air circulation pipeline, an air condenser connected with the tail end of the air circulation pipeline, a cooling water circulation pipeline connected with the other side of the air condenser, and a mechanical ventilation cooling tower connected with the cooling water circulation pipeline.
The invention relates to a waste water evaporation and concentration device based on low-temperature spray desulfurization, wherein an air condenser is a shell-and-tube air condenser, high-temperature saturated humid air flows outside a tube to release heat, partial condensed water is separated out, and cooling water circulates inside the tube.
The invention relates to a waste water evaporation and concentration device based on low-temperature spray desulfurization, wherein an air condenser is a plate-type air condenser, high-temperature saturated humid air flows outside a pipe to release heat, partial condensed water is separated out, and cooling water circulates inside the pipe.
The waste water evaporation and concentration device based on low-temperature spray desulfurization is characterized in that a heat source of the heat exchanger can adopt low-temperature economizer hot medium water, low-temperature steam or low-temperature heat source water.
According to the waste water evaporation concentration device based on low-temperature spray desulfurization, the evaporation tower is layered according to gravity and is sequentially provided with a concentrated water area, a clear liquid area and a spraying area from bottom to top.
The invention relates to a wastewater evaporation concentration device based on low-temperature spray desulfurization, wherein clear liquid in a clear liquid zone of desulfurization wastewater in an evaporation tower enters a clear liquid circulation pipeline of the desulfurization wastewater, and concentrated wastewater concentrated water in a concentrated water zone enters a subsequent treatment system from the bottom.
The invention relates to a waste water evaporation concentration device based on low-temperature spray desulfurization.
The waste water evaporation and concentration device based on low-temperature spray desulfurization can also adopt a buffer tank form. The demister removes fog drops carried in high-temperature saturated wet air, and ensures that air entering the air circulation pipeline is in a clean state. The air condenser can be used for condensing the condensate water for the process water of a desulfurization system or other process water of a power plant. The mechanical ventilation cooling tower adopts a forced ventilation heat exchange mode, and can also utilize the original cooling tower or a newly-built cooling tower of a power plant to adopt a natural ventilation heat exchange mode.
According to the waste water evaporation and concentration device based on low-temperature spray desulfurization, the air condenser is used for separating out partial condensed water after high-temperature saturated wet air flows out of the pipe to release heat, and cooling water circulates in the pipe. In the heat exchanger, a heat source can adopt low-temperature economizer hot medium water, low-temperature steam or low-temperature heat source water. The evaporation tower is layered according to gravity and is sequentially provided with a concentrated water area, a clear liquid area and a spraying area from bottom to top. The clear liquid in the clear liquid zone of the desulfurization waste water in the evaporation tower enters a clear liquid circulation pipeline of the desulfurization waste water, and the concentrated desulfurization waste water in the concentrated water zone enters a subsequent treatment system from the bottom. The evaporation tower, its inside spraying district sets up one deck spraying system at least, guarantees that desulfurization waste water clear solution can evenly atomize, increases evaporation efficiency.
The waste water evaporation concentration device based on low-temperature spray desulfurization utilizes closed circulating air as a carrier, achieves the purpose of concentration and reduction of desulfurization waste water, and simultaneously recycles condensed water. The heated desulfurization waste water clear solution is uniformly sprayed into the evaporation tower through the atomization spraying device and falls back to the bottom, low-temperature saturated humid air enters the evaporation tower to be uniformly mixed with the evaporation tower in a reverse direction, meanwhile, part of evaporated moisture is carried by air, the air is changed into a high-temperature saturated state, the high-temperature saturated humid air enters the air condenser to be cooled again into the low-temperature saturated humid air by circulating cooling water, and precipitated condensate water can be used for desulfurization and other power plant process water.
In conclusion, the waste water evaporation and concentration device based on low-temperature spraying desulfurization ensures that the clear liquid of the desulfurization waste water can be uniformly atomized, the evaporation efficiency is increased, the concentration and the reduction of the desulfurization waste water are realized, and the precipitated condensate water can be used for desulfurization and other process water of power plants.
Drawings
The invention will be further described with reference to the accompanying drawings and examples thereof.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In fig. 1, the waste water evaporation concentration device based on low-temperature spray desulfurization of the invention comprises a desulfurization waste water buffer system, an evaporation concentration system and a gas-liquid condensation system; the desulfurization wastewater buffer system comprises a buffer tank 1, a desulfurization wastewater water inlet pipeline 2 connected with an inlet of the buffer tank, and a desulfurization wastewater conveying pipeline 3 connected with an outlet of the buffer tank; the evaporation concentration system comprises an evaporation tower 4, an atomization spray device 5, a demister 6, a desulfurization waste water clear liquid circulating pipeline 7, a heat exchanger 8 and a heating medium circulating pipeline 9, wherein the lower part of the outer side of the evaporation tower 4 is connected with the desulfurization waste water conveying pipeline; the gas-liquid condensation system comprises an air circulation pipeline 10 connected with the evaporation tower, a blower 11 arranged on the air circulation pipeline, an air condenser 12 connected with the tail end of the air circulation pipeline, a cooling water circulation pipeline 13 connected with the other side of the air condenser, and a mechanical ventilation cooling tower 14 connected with the cooling water circulation pipeline.
The invention relates to a waste water evaporation and concentration device based on low-temperature spray desulfurization, wherein an air condenser is a shell-and-tube air condenser, high-temperature saturated humid air flows outside a tube to release heat, partial condensed water is separated out, and cooling water circulates inside the tube.
The invention relates to a waste water evaporation and concentration device based on low-temperature spray desulfurization, wherein an air condenser is a plate-type air condenser, high-temperature saturated humid air flows outside a pipe to release heat, partial condensed water is separated out, and cooling water circulates inside the pipe.
The waste water evaporation and concentration device based on low-temperature spray desulfurization is characterized in that a heat source of the heat exchanger can adopt low-temperature economizer hot medium water, low-temperature steam or low-temperature heat source water.
According to the waste water evaporation concentration device based on low-temperature spray desulfurization, the evaporation tower is layered according to gravity and is sequentially provided with a concentrated water area, a clear liquid area and a spraying area from bottom to top.
The invention relates to a wastewater evaporation concentration device based on low-temperature spray desulfurization, wherein clear liquid in a clear liquid zone of desulfurization wastewater in an evaporation tower enters a clear liquid circulation pipeline of the desulfurization wastewater, and concentrated wastewater concentrated water in a concentrated water zone enters a subsequent treatment system from the bottom.
The invention relates to a waste water evaporation concentration device based on low-temperature spray desulfurization.
In addition, in fig. 1, low-temperature economizer heat source water a, low-temperature steam b, power plant low-temperature heat source water c, concentrated desulfurization wastewater d, power plant process water or other water e.
It should be understood that the above-described embodiments are merely exemplary of the present invention, and that various changes and modifications in the form, construction, features and spirit of the invention described in the claims should be included in the scope of the invention.
Claims (7)
1. A waste water evaporation concentration device based on low-temperature spray desulfurization is characterized by comprising a desulfurization waste water buffer system, an evaporation concentration system and a gas-liquid condensation system; the desulfurization wastewater buffer system comprises a buffer tank, a desulfurization wastewater water inlet pipeline connected with an inlet of the buffer tank, and a desulfurization wastewater conveying pipeline connected with an outlet of the buffer tank; the evaporation concentration system comprises an evaporation tower, an atomization spraying device, a demister, a desulfurization waste water clear liquid circulating pipeline, a heat exchanger and a heating medium circulating pipeline, wherein the outer lower part of the evaporation tower is connected with the desulfurization waste water conveying pipeline; the gas-liquid condensation system comprises an air circulation pipeline connected with the evaporation tower, a blower arranged on the air circulation pipeline, an air condenser connected with the tail end of the air circulation pipeline, a cooling water circulation pipeline connected with the other side of the air condenser, and a mechanical ventilation cooling tower connected with the cooling water circulation pipeline.
2. The wastewater evaporative concentration device based on low-temperature spray desulfurization as claimed in claim 1, wherein the air condenser is a shell-and-tube air condenser, high-temperature saturated humid air flows outside the tubes to release heat, partial condensed water is separated out, and cooling water circulates inside the tubes.
3. The wastewater evaporative concentration device based on low-temperature spray desulfurization as claimed in claim 1, wherein the air condenser is a plate air condenser, high-temperature saturated humid air flows outside the pipe to release heat, partial condensed water is separated out, and cooling water circulates inside the pipe.
4. The wastewater evaporative concentration device based on low-temperature spray desulfurization as claimed in claim 1, wherein the heat exchanger and the heat source can adopt low-temperature economizer hot water, low-temperature steam or low-temperature heat source water.
5. The wastewater evaporative concentration device based on low-temperature spray desulfurization according to claim 1, wherein the evaporation tower is layered according to gravity and is sequentially provided with a concentrated water area, a clear liquid area and a spraying area from bottom to top.
6. The wastewater evaporative concentration device based on low-temperature spray desulfurization as claimed in claim 5, wherein the clear liquid in the clear liquid zone of the desulfurization wastewater in the evaporation tower enters the clear liquid circulation pipeline of the desulfurization wastewater, and the concentrated wastewater of the desulfurization wastewater concentrated in the concentrated water zone enters the subsequent treatment system from the bottom.
7. The wastewater evaporative concentration device based on low-temperature spray desulfurization as claimed in claim 5, wherein the evaporation tower is provided with at least one layer of spraying system in the internal spraying area.
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| CN201921063205.9U CN210559480U (en) | 2019-07-09 | 2019-07-09 | Waste water evaporation and concentration device based on low-temperature spray desulfurization |
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| CN201921063205.9U CN210559480U (en) | 2019-07-09 | 2019-07-09 | Waste water evaporation and concentration device based on low-temperature spray desulfurization |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110240212A (en) * | 2019-07-09 | 2019-09-17 | 青岛达能环保设备股份有限公司 | A kind of waste water evaporation concentration system and technique based on low temperature spray desulfurization |
| CN112744882A (en) * | 2021-01-22 | 2021-05-04 | 嘉兴港区工业污水处理有限公司 | Recycling system of toxic and harmful degradation-resistant wastewater |
| CN115057494A (en) * | 2022-06-16 | 2022-09-16 | 江苏嘉通能源有限公司 | Condensing unit for treating desulfurization wastewater of coal-fired power plant |
-
2019
- 2019-07-09 CN CN201921063205.9U patent/CN210559480U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110240212A (en) * | 2019-07-09 | 2019-09-17 | 青岛达能环保设备股份有限公司 | A kind of waste water evaporation concentration system and technique based on low temperature spray desulfurization |
| CN112744882A (en) * | 2021-01-22 | 2021-05-04 | 嘉兴港区工业污水处理有限公司 | Recycling system of toxic and harmful degradation-resistant wastewater |
| CN115057494A (en) * | 2022-06-16 | 2022-09-16 | 江苏嘉通能源有限公司 | Condensing unit for treating desulfurization wastewater of coal-fired power plant |
| CN115057494B (en) * | 2022-06-16 | 2023-11-17 | 江苏嘉通能源有限公司 | Condensing device for desulfurization wastewater treatment of coal-fired power plant |
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