CN211445120U - Desulfurization waste water flue evaporation system - Google Patents
Desulfurization waste water flue evaporation system Download PDFInfo
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- CN211445120U CN211445120U CN201821932704.2U CN201821932704U CN211445120U CN 211445120 U CN211445120 U CN 211445120U CN 201821932704 U CN201821932704 U CN 201821932704U CN 211445120 U CN211445120 U CN 211445120U
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Abstract
A flue evaporation system for desulfurization waste water, which comprises a coal-fired boiler, an economizer, an air preheater, a flue gas cooler, an electric dust remover, a desulfurization tower, a chimney, a desulfurization waste water heating device and a spray evaporator which are sequentially communicated through a main flue, the desulfurization wastewater heating device comprises a wastewater pipeline, an inlet of the wastewater pipeline is communicated with the desulfurization tower, the outlet of the waste water pipeline is communicated with the liquid inlet of the spray evaporator through the flue gas cooler, used for introducing desulfurization wastewater in a desulfurization tower into a spray evaporator, the spray evaporator also comprises a hot air inlet, a hot air outlet and an ash discharge outlet, the hot air inlet is communicated with an air preheater, the hot air outlet is communicated with the air inlet of the boiler; the waste heat of the flue gas is utilized, and a bypass flue is arranged for evaporating the desulfurization waste water and separating out solid salt particles.
Description
Technical Field
The utility model relates to a desulfurization waste water flue evaporation system belongs to thermal power technology and waste water treatment field, concretely relates to utilize flue gas waste heat to handle bypass flue evaporation system of desulfurization waste water.
Background
In recent years, the emission standards of SO2, NOX and smoke dust of coal-fired power plants in China are strict, and in order to meet the requirement of environmental protection, a desulfurization system needs to regularly discharge desulfurization wastewater. The waste water is generally heated to 40-50 ℃, and the water quality has the characteristics of high salt content, strong corrosivity, easy scaling and the like. The traditional method for treating desulfurization wastewater in a power plant is triple-box treatment, which mainly removes heavy metals and suspended matters in wastewater, discharges high-salt concentrated solution to an ash yard or a coal yard and the like, and is difficult to realize zero discharge of wastewater.
At present, concentration reduction, evaporation and crystallization technologies are generally adopted for zero emission treatment of desulfurization wastewater. After the waste water is concentrated and reduced, about 95 percent of waste water can be recovered and used as boiler make-up water, cooling tower make-up water and the like. The remaining concentrated solution can be processed into solid particles by an evaporation pond process or a crystallizer and the like, and the solid particles are recovered or buried according to the situation. The technology has high equipment investment and operation cost and low popularization rate.
Disclosure of Invention
An object of the utility model is to provide an utilize flue evaporation system of flue gas waste heat treatment desulfurization waste water effectively utilizes the flue gas waste heat, under the condition of not additionally replenishing the energy, realizes desulfurization waste water solid-liquid separation, separates out the salinity to recycle the waste heat air, reach low in investment cost, energy-concerving and environment-protective purpose.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a flue evaporation system for desulfurization waste water, which comprises a coal-fired boiler, an economizer, an air preheater, a flue gas cooler, an electric dust remover, a desulfurization tower, a chimney, a desulfurization waste water heating device and a spray evaporator which are sequentially communicated through a main flue, the desulfurization wastewater heating device comprises a wastewater pipeline, an inlet of the wastewater pipeline is communicated with the desulfurization tower, the outlet of the waste water pipeline is communicated with the liquid inlet of the spray evaporator through the flue gas cooler, used for introducing desulfurization wastewater in a desulfurization tower into a spray evaporator, the spray evaporator also comprises a hot air inlet, a hot air outlet and an ash discharge outlet, the hot air inlet is communicated with an air preheater, the hot air outlet is communicated with the air inlet of the boiler.
Preferably, a wastewater processor is further installed on the wastewater pipeline, and the wastewater processor is located on a bypass pipe between the desulfurization tower and the flue gas cooler.
Preferably, a water pump is further installed on the wastewater pipeline, and the water pump is located on the wastewater pipeline between the wastewater processor and the flue gas cooler.
Preferably, the refrigerant of the flue gas cooler is desulfurization waste water.
Preferably, the spray evaporator is a commercially available spray evaporator.
Compared with the prior art, the beneficial effects of the utility model reside in that: the flue gas of the main flue sequentially passes through a boiler, an economizer, an air preheater, a flue gas cooler, an electric dust remover and a desulfurizing tower and is finally discharged through a chimney; the desulfurization waste water flows out of the desulfurization tower, passes through a waste water preprocessor and a water pump, enters a flue gas cooler, is used as a refrigerant of the flue gas cooler, extracts partial waste heat of flue gas of a main flue, is used for preheating the desulfurization waste water, improves the temperature of the desulfurization waste water, enters an atomization evaporator after being heated, simultaneously, hot air introduced into an air preheater by the atomization evaporator is uniformly atomized into small liquid drops by the atomization evaporator, and is subjected to heat exchange with hot air flow and moisture evaporation under a high-temperature flue gas environment by utilizing the waste heat of the flue gas, so that salt in the waste water is analyzed into solid particles and can be discharged by the atomization evaporator, and the evaporated hot air enters the boiler again to be supplied for continuous utilization as air, thereby reducing the energy consumption; the utility model utilizes the flue gas waste heat, increases the temperature of the desulfurization waste water, does not need additional energy supplement, does not need a crystallizer, has low investment cost, saves energy, protects the environment, saves energy and reduces consumption; the utility model discloses set up the spray evaporation zone, be used for desulfurization waste water evaporation specially, can effectively avoid main flue deposition scale deposit and corruption, the solid salt granule that appears discharges, need not to add other equipment, and is simple and efficient.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1, the flue evaporation system for desulfurization waste water comprises a boiler 1, an economizer 2, an air preheater 3, a flue gas cooler 4, an electric dust remover 5, a desulfurization tower 6, a chimney 7, a desulfurization waste water heating device and a spray evaporator 10 which are sequentially communicated through a main flue 11, wherein the desulfurization waste water heating device comprises a waste water pipeline 12, an inlet of the waste water pipeline 12 is communicated with the desulfurization tower 6, an outlet of the waste water pipeline 12 is communicated with a liquid inlet of the spray evaporator 10 through the flue gas cooler 4 for introducing desulfurization waste water in the desulfurization tower 6 into the spray evaporator 10, the spray evaporator 10 further comprises a hot air inlet, a hot air outlet and an ash discharge outlet, the hot air inlet is communicated with the air preheater 3 for introducing hot air generated by the air preheater 3 into the spray evaporator 10, and the spray evaporator 10 evaporates desulfurization waste water liquid, the hot air outlet is in communication with the air inlet of the boiler 1.
Preferably, a wastewater processor 8 is further installed on the wastewater pipeline 12, the wastewater processor 8 is located above a bypass pipe between the desulfurization tower 6 and the flue gas cooler 4, and the wastewater processor 8 can be a commercially available processor with a wastewater processing function.
Preferably, a water pump 9 is further installed on the wastewater pipeline 12, and the water pump 9 is located on the wastewater pipeline 12 between the wastewater processor 8 and the flue gas cooler 4.
Preferably, the refrigerant of the flue gas cooler 4 is desulfurization waste water.
Preferably, the spray evaporator 10 may be a commercially available spray evaporator.
Obviously, the above embodiment is only one example of the present invention, and any simple improvement in the structure or principle provided by the present invention is within the protection scope of the present invention.
Claims (4)
1. A flue evaporation system for desulfurization waste water, which comprises a coal-fired boiler, an economizer, an air preheater, a flue gas cooler, an electric dust remover, a desulfurization tower and a chimney which are sequentially communicated through a main flue, it is characterized by also comprising a desulfurization waste water heating device and a spray evaporator, wherein the desulfurization waste water heating device comprises a waste water pipeline, the inlet of the waste water pipeline is communicated with the desulfurizing tower, the outlet of the waste water pipeline is communicated with the liquid inlet of the spray evaporator through the flue gas cooler, used for introducing desulfurization wastewater in a desulfurization tower into a spray evaporator, the spray evaporator also comprises a hot air inlet, a hot air outlet and an ash discharge outlet, the hot air inlet is communicated with an air preheater, the hot air outlet is communicated with the air inlet of the boiler.
2. The desulfurization wastewater flue evaporation system of claim 1, wherein a wastewater processor is further installed on the wastewater pipeline, and the wastewater processor is located on the bypass pipeline between the desulfurization tower and the flue gas cooler.
3. The desulfurization wastewater flue evaporation system of claim 2, wherein a water pump is further installed on the wastewater pipeline, and the water pump is located on the bypass pipeline between the wastewater processor and the flue gas cooler.
4. The flue gas desulfurization waste water evaporation system as claimed in claim 1, 2 or 3, wherein the refrigerant of the flue gas cooler is desulfurization waste water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821932704.2U CN211445120U (en) | 2018-11-22 | 2018-11-22 | Desulfurization waste water flue evaporation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821932704.2U CN211445120U (en) | 2018-11-22 | 2018-11-22 | Desulfurization waste water flue evaporation system |
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| CN211445120U true CN211445120U (en) | 2020-09-08 |
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| CN201821932704.2U Active CN211445120U (en) | 2018-11-22 | 2018-11-22 | Desulfurization waste water flue evaporation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112125363A (en) * | 2020-09-22 | 2020-12-25 | 国家电投集团远达环保工程有限公司重庆科技分公司 | System and method for treating flue gas desulfurization wastewater |
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2018
- 2018-11-22 CN CN201821932704.2U patent/CN211445120U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112125363A (en) * | 2020-09-22 | 2020-12-25 | 国家电投集团远达环保工程有限公司重庆科技分公司 | System and method for treating flue gas desulfurization wastewater |
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