CN217627670U - Coal fired power plant sewage zero release processing apparatus - Google Patents
Coal fired power plant sewage zero release processing apparatus Download PDFInfo
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- CN217627670U CN217627670U CN202221286688.0U CN202221286688U CN217627670U CN 217627670 U CN217627670 U CN 217627670U CN 202221286688 U CN202221286688 U CN 202221286688U CN 217627670 U CN217627670 U CN 217627670U
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Abstract
The utility model discloses a coal fired power plant sewage zero release processing apparatus, including circulating fluidized bed boiler, circulating fluidized bed boiler intercommunication has the fuel pulverized coal pipe that supplies external fuel to get into circulating fluidized bed boiler furnace combustion area, circulating fluidized bed boiler furnace combustion area below intercommunication has the primary air pipe, the primary air pipe communicates branch road one of industrial waste water pipeline, waste water in the branch road one mixes the primary air that gets into circulating fluidized bed boiler furnace combustion area through atomizing into steam and primary air pipe; the upper part of the combustion zone of the circulating fluidized bed boiler furnace is communicated with a secondary air pipe, the secondary air pipe is communicated with a second branch of industrial wastewater management, and wastewater in the second branch is atomized into steam to be mixed with secondary air of the secondary air pipe to enter the upper part of the combustion zone of the circulating fluidized bed furnace. The industrial wastewater enters the primary atomization through the primary atomization and is mixed with primary air, and the secondary atomization and the secondary mixing enter the dense-phase zone of the circulating fluidized bed boiler for combustion, so that the combustion in the boiler can be optimized, and the zero discharge of the sewage of the whole plant can be realized.
Description
Technical Field
The utility model relates to a coal fired power plant sewage zero release processing apparatus.
Background
Coal is the resource occupying the largest proportion of petrochemical energy consumption in China, and a coal-fired power plant and the coal chemical industry have more and huge energy consumption, and the produced wastewater and the discharge amount are also higher. With the increasing environmental issues and the increasing shortage of energy, the treatment of water and sewage in coal-fired power plants is becoming a major problem in current production. The waste water of the coal-fired power plant has complex components and serious pollution, and greatly restricts the green low-carbon development of urban coal-fired power plants and coal chemical enterprises.
The widely used industrial waste water treatment technology at present at home mainly comprises RO (reverse osmosis membrane double membrane method) and EDI technology. Their main material is a nano-scale reverse osmosis membrane, and the target of this technology is ions (heavy metal ions) and organic substances with molecular weight of more than several hundred. However, only about 60% of pure water can be obtained by using the technology, and the residual wastewater containing high-concentration harmful substances is finally discharged into the environment, so that the environmental pollution is caused, and the treatment cost is increased.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model aims at providing an utilize power plant's existing equipment to handle sewage, realize the coal fired power plant sewage zero release processing apparatus of power plant's sewage zero release.
Realize the technical scheme of the utility model as follows
The coal-fired power plant sewage zero-discharge treatment device comprises a circulating fluidized bed boiler, wherein the circulating fluidized bed boiler is communicated with a fuel pulverized coal pipe for allowing external fuel to enter a hearth combustion area of the circulating fluidized bed boiler;
the upper part of the combustion zone of the circulating fluidized bed boiler furnace is communicated with a secondary air pipe, the secondary air pipe is communicated with a second branch of industrial wastewater management, and wastewater in the second branch is atomized into steam to be mixed with secondary air of the secondary air pipe to enter the upper part of the combustion zone of the circulating fluidized bed furnace.
One embodiment in this application: the temperature of the primary air combustion area of the circulating fluidized bed boiler hearth is less than or equal to 850 ℃.
One embodiment in this application: the air inlet volume of the secondary air pipe is larger than that of the primary air pipe.
One embodiment in this application: and a first flow valve is assembled on the first branch of the industrial waste water pipeline and controls the flow of the water vapor in the first branch of the industrial waste water pipeline into the primary air pipe.
One embodiment in this application: and a flow valve II is assembled on the branch II of the industrial waste water pipeline and controls the flow of the water vapor in the branch II of the industrial waste water pipeline flowing into the secondary air pipe.
By adopting the technical scheme, the application provides a novel coal-fired power plant sewage zero discharge technology, industrial wastewater enters primary atomization through primary atomization and is mixed with primary air, and secondary atomization and secondary mixing enter a circulating fluidized bed boiler dense-phase region to be combusted, so that combustion in a furnace can be optimized, and the sewage zero discharge of a whole plant is achieved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a water balance diagram of the system, taken as an example of a 2x400t/h circulating fluidized bed boiler;
in the drawing, 100, a circulating fluidized bed boiler 101, a fuel coal powder pipe 102, a primary air pipe 103, a first branch 104 of an industrial wastewater pipeline, a secondary air pipe 105 and a second branch of an industrial wastewater management pipeline.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are some, not all embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, the coal-fired power plant sewage zero emission treatment device comprises a circulating fluidized bed boiler 100, wherein the circulating fluidized bed boiler 100 is communicated with a fuel pulverized coal pipe 101 for allowing external fuel to enter a hearth combustion area of the circulating fluidized bed boiler 100, the external fuel enters the hearth combustion area of the circulating fluidized bed boiler 100 from the fuel pulverized coal pipe 101101 for combustion, a primary air pipe 102 is communicated below the hearth combustion area of the circulating fluidized bed boiler 100, the primary air pipe 102 is communicated with a first branch 103 of an industrial waste water pipeline, and waste water in the first branch 103 is atomized into water vapor to be mixed with primary air of the primary air pipe 102 to enter the hearth combustion area of the circulating fluidized bed boiler 100 for combustion.
The upper part of the hearth combustion area of the circulating fluidized bed boiler 100 is communicated with a secondary air pipe 104, the secondary air pipe 104 is communicated with a second branch 105 of industrial wastewater management, and wastewater in the second branch 105 is atomized into steam to be mixed with secondary air of the secondary air pipe 104 and enters the upper part of the hearth combustion area of the circulating fluidized bed for combustion. The industrial wastewater enters the primary atomization through the primary atomization and is mixed with primary air, and the secondary atomization and the secondary mixing enter the circulating fluidized bed boiler 100 for combustion, so that pollutants contained in the industrial wastewater are solved.
In the implementation of the application, the temperature of the primary air combustion area of the hearth of the circulating fluidized bed boiler 100 is less than or equal to 850 ℃.
In the implementation of the application, the air inlet volume of the secondary air pipe is greater than that of the primary air pipe 102.
In the implementation of the application, a first flow valve is assembled on a first branch of the industrial wastewater pipeline, and the first flow valve controls the flow of water vapor in the first branch of the industrial wastewater pipeline flowing into the primary air pipe 102. Through the setting of flow valve one, can control the flow that gets into in the furnace after the industrial waste water atomizing to adjust the flow according to the speed of burning processing.
In the implementation of the application, a second flow valve is assembled on a second branch of the industrial wastewater pipeline, and the second flow valve controls the flow of the water vapor in the second branch of the industrial wastewater pipeline flowing into the secondary air pipe 104. Through the setting of flow valve two, can control the flow that gets into in the furnace after the industrial waste water atomizing to adjust the flow according to the speed of burning processing.
In this application implementation, adopt the atomizer atomizing back at industrial waste water management branch road one, two exhaust waste water, send into corresponding in the tuber pipe and mix with corresponding air distribution and get into in the boiler and burn.
In the application, a 2x400t/h circulating fluidized bed boiler 100 is taken as an example, a water balance diagram of a system is shown in figure 2, condensate water obtained by recovering waste heat of reservoir water and flue gas enters raw water for pretreatment, and finally 9.5m is obtained after a series of processes 3 The high-concentration industrial wastewater needs to be treated.
As shown in figure 1, the industrial high-concentration wastewater is respectively mixed with the primary air and the secondary air through the atomizing nozzle, so that the temperature of the primary air and the temperature of the hearth are reduced.
Primary wind reaction: air and steam are used as primary air and enter a boiler from the bottom of a hearth to react as follows:
2C+O 2 ＝2CO
C+H 2 O＝CO+H 2
because the reaction of carbon and water vapor is endothermic, the temperature of the primary air combustion area is controlled to be less than or equal to 850 ℃ by controlling the proportion of the water vapor and the air, and the generation of thermal NOx is avoided.
Secondary air reaction: sufficient secondary air and water vapor are fed into a hearth, and the following reaction occurs:
C+O 2 ＝CO 2
C+H 2 O＝CO+H 2
2CO+O 2 ＝2CO 2
2H 2 +O 2 ＝2H 2 O
because of the existence of steam, the temperature of the hearth is reduced by 20-30 ℃ compared with that of a common boiler, the reduction of the temperature of the hearth can reduce the generation of NOx, and CO and H simultaneously 2 The reducing gas can also suppress the generation of NOx.
The application provides a sewage zero release technology, mixes the industrial high-concentration waste water into a hearth for combustion respectively in a secondary air after atomizing, and CO and H generated by the reaction of water vapor and carbon 2 All are combustible gases, continue to burn in the hearth, reduceThe fuel consumption is reduced, the combustion temperature of the hearth is reduced while zero discharge of sewage is realized, and the generation of NOx is reduced.
From circulating fluidized bed boiler 100 exhaust flue gas in this application, reduce the flue gas temperature through the cooling water, fall the water vapor condensation in the flue gas, promote the temperature of cooling water simultaneously, the cooling water after the intensification preheats the overgrate air in the air pipe 102 and the overgrate air in the secondary air pipe. Through the flue gas waste heat recovery technology, the moisture in a large amount of flue gas is recovered, and the raw water consumption is reduced.
Claims (5)
1. The coal-fired power plant sewage zero-discharge treatment device comprises a circulating fluidized bed boiler, wherein the circulating fluidized bed boiler is communicated with a fuel pulverized coal pipe for allowing external fuel to enter a hearth combustion area of the circulating fluidized bed boiler;
the upper part of the combustion zone of the circulating fluidized bed boiler furnace is communicated with a secondary air pipe, the secondary air pipe is communicated with a second branch of industrial wastewater management, and wastewater in the second branch is atomized into steam to be mixed with secondary air of the secondary air pipe to enter the upper part of the combustion zone of the circulating fluidized bed furnace.
2. The coal-fired power plant sewage zero emission treatment device of claim 1, wherein the temperature of the primary air combustion zone of the circulating fluidized bed boiler furnace is less than or equal to 850 ℃.
3. The coal-fired power plant sewage zero emission treatment device of claim 1, wherein the air intake of the secondary air pipe is larger than the air intake of the primary air pipe.
4. The coal fired power plant sewage zero emission treatment device of claim 1, wherein a first flow valve is fitted to the first branch of the industrial waste water pipeline, the first flow valve controlling the flow of water vapor in the first branch of the industrial waste water pipeline into the primary air pipe.
5. The coal-fired power plant sewage zero emission treatment device of claim 1, wherein a second flow valve is installed on a second branch of the industrial wastewater pipeline, and the second flow valve controls the flow rate of the water vapor in the second branch of the industrial wastewater pipeline flowing into the secondary air pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221286688.0U CN217627670U (en) | 2022-05-27 | 2022-05-27 | Coal fired power plant sewage zero release processing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221286688.0U CN217627670U (en) | 2022-05-27 | 2022-05-27 | Coal fired power plant sewage zero release processing apparatus |
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| CN217627670U true CN217627670U (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221286688.0U Active CN217627670U (en) | 2022-05-27 | 2022-05-27 | Coal fired power plant sewage zero release processing apparatus |
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2022
- 2022-05-27 CN CN202221286688.0U patent/CN217627670U/en active Active
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