CN209735285U - Chemical demineralized water and flue gas desulfurization integrated processing system - Google Patents

Chemical demineralized water and flue gas desulfurization integrated processing system Download PDF

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CN209735285U
CN209735285U CN201822163018.XU CN201822163018U CN209735285U CN 209735285 U CN209735285 U CN 209735285U CN 201822163018 U CN201822163018 U CN 201822163018U CN 209735285 U CN209735285 U CN 209735285U
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water
flue gas
water pipe
chemical
valve
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刘传东
宋世伟
沈煜晖
马爱
刘雷
李汉明
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Liaocheng Xinyuan Group Co Ltd
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Liaocheng Xinyuan Group Co Ltd
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Abstract

The utility model discloses a chemical desalination water and flue gas desulfurization integrated processing system, it includes chemical desalination water system (1), chemical desalination water system (1) is including main water pipe (14), main water pipe (14) are equipped with first inlet valve (141), chemical desalination water system (1) still include with second water pipe (15) and third water pipe (16) that main water pipe (14) are linked together, second water pipe (15) and third water pipe (16) are located respectively first inlet valve (141) both sides, integrated processing system still includes flue gas desulfurization system (2), flue gas desulfurization system (2) include flue gas condenser (21), flue gas condenser (21) both ends respectively with second water pipe (15) and third water pipe (16) are linked together. The utility model discloses combine together chemical desalination water system and flue gas desulfurization system, effectively improve demineralized water and desulfurization efficiency, energy-concerving and environment-protective.

Description

Chemical demineralized water and flue gas desulfurization integrated processing system
Technical Field
The utility model relates to a coal fired power station energy saving and environmental protection technical field, in particular to chemical demineralized water and flue gas desulfurization integrated processing system.
Background
The coal-fired thermal power plant is provided with a limestone-gypsum wet flue gas desulfurization system, wherein in the limestone-gypsum flue gas desulfurization system, high-temperature dry flue gas enters a desulfurization absorption tower, and slurry rich in alkaline limestone is circularly sprayed in the desulfurization tower to absorb sulfur dioxide in the flue gas. In the spraying process, a large amount of moisture in the slurry is evaporated, so that the flue gas at the outlet of the desulfurization absorption tower reaches the saturation temperature of the moisture, the temperature of the flue gas is about 50 ℃, the moisture content in the flue gas is 10-15%, and the part of the water is discharged into the atmosphere through a chimney.
The coal-fired thermal power plant is usually also provided with a chemical desalting water treatment system, and because the water source temperature of inlet water (raw water) of the chemical desalting water system is low in the heating season, about 5-10 ℃, the viscosity of water is increased due to the low temperature, the permeability of a water treatment membrane is reduced, and the water yield of the chemical desalting water system is reduced. Therefore, a steam heating device is often arranged in the system to increase the temperature of the inlet water of the chemical desalting water system. The inlet water is treated by the chemical desalting water treatment system and then is delivered to a hot well below a deaerator or a condenser through a water outlet, and the higher the temperature of the outlet water is, the better the outlet water temperature is because part of the water also needs to consume low steam (steam) extraction.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure, energy-concerving and environment-protective chemical demineralized water and flue gas desulfurization integrated processing system to the above-mentioned defect among the prior art.
in order to realize the purpose of the utility model, the utility model adopts the following technical scheme: the utility model provides a chemical demineralized water and flue gas desulfurization integrated processing system, it includes chemical demineralized water system, chemical demineralized water system includes the main water pipe, the main water pipe is equipped with first entry valve, chemical demineralized water system still include with second water pipe and third water pipe that the main water pipe is linked together, second water pipe and third water pipe are located respectively first entry valve both sides, integrated processing system still includes flue gas desulfurization system, flue gas desulfurization system includes flue gas condenser, the flue gas condenser both ends respectively with second water pipe and third water pipe are linked together.
Furthermore, the utility model discloses still provide following subsidiary technical scheme: the flue gas condenser is provided with a cold source water inlet connected with the second water pipe and a cold source water outlet connected with the third water pipe.
The main water pipe is provided with a water inlet and a water outlet, the first inlet valve is positioned on the water inlet side, and the first outlet valve is positioned on the water outlet side.
one end of the second water pipe is connected to the left side of the first inlet valve, and the other end of the second water pipe is connected to the left side of the first outlet valve.
The second water pipe is located one side of the water inlet is provided with a second inlet valve for making and breaking raw water and a first check valve for preventing backflow, and the second water pipe is located one side of the water outlet is provided with a second outlet valve and a second check valve.
one end of the third water pipe is connected to the right side of the first inlet valve, and the other end of the third water pipe is connected to the right side of the first outlet valve.
The third water pipe is located one side of the water inlet and is provided with a third inlet valve and a third check valve, and the third water pipe is located one side of the water outlet and is provided with a third outlet valve and a fourth check valve.
The using method comprises a using method in a heating season and a using method in a non-heating season.
The use method in the heating season comprises the following steps:
S1: providing a first inlet valve, a second water pipe and a flue gas condenser, closing the first inlet valve, opening the second inlet valve, and enabling raw water to flow into the second water pipe along the second inlet valve and enter a cold source water inlet of the flue gas condenser;
S2: providing demineralized water device, third water pipe, third inlet valve and first outlet valve, opening third inlet valve and first outlet valve, raw water behind the condensation flue gas by flue gas condenser's cold source water outlet flows in the third water pipe, and the warp flow out after the demineralized water device handles first outlet valve.
The using method in the non-heating season comprises the following steps:
S1: providing a first inlet valve, a second inlet valve, a third inlet valve, a main water pipe and a desalted water device, opening the first inlet valve, closing the second inlet valve and the third inlet valve, and leading raw water to flow from the first inlet valve to the desalted water device along the main water pipe to obtain desalted water;
s2: providing a first outlet valve, a second water pipe and a flue gas condenser, closing the first outlet valve, opening the second outlet valve, and enabling the desalted water to flow into a cold source water inlet of the flue gas condenser along the second water pipe through the second outlet valve;
s3: and providing a third outlet valve and a third water pipe, opening the third outlet valve, and enabling the desalted water to flow into the third water pipe from a cold source water outlet of the flue gas condenser after the desalted water condenses the flue gas and flow out through the third outlet valve.
Compared with the prior art, the utility model has the advantages of:
1. The utility model combines the chemical desalination water system with the flue gas desulfurization system, thereby effectively improving the desalination water and desulfurization efficiency;
2. In non-heating seasons, demineralized water is used as cold source water of the flue gas condenser, the demineralized water flows back to the water outlet after being condensed and heated in the flue gas condenser, and the demineralized water is heated, so that steam consumption of a deaerator or a hot well can be saved, and energy conservation is realized.
3. Raw water is used as cold source water of the flue gas condenser in the heating season, so that on one hand, flue gas can be condensed to extract water, and water conservation and environmental protection are realized; on the other hand, after the cold source water is condensed, the temperature rises and flows into the chemical demineralized water system again and is treated by the demineralized water device, and the water yield of the demineralized water can be increased without additionally arranging a heating device at the water inlet;
Drawings
FIG. 1 is a schematic diagram of the overall structure of the integrated processing system of the present invention.
Detailed Description
The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings.
As shown in fig. 1, the present embodiment provides a chemical desalted water and flue gas desulfurization integrated treatment system, which comprises a chemical desalted water system 1 and a flue gas desulfurization system 2 communicated with the chemical desalted water system 1. The flue gas desulfurization system 2 comprises a flue gas condenser 21 arranged on the flue 3, and water in the chemical demineralized water system 1 can flow into the flue gas condenser 21 to be used as cold source water to perform desulfurization treatment on the flue gas.
the chemical desalination water system 1 comprises a water inlet 11, a water outlet 12 and a desalination water device 13 positioned between the water inlet 11 and the water outlet 12, wherein the water inlet 11 is connected with a raw water source 17, and the water outlet 12 is connected with a deaerator or a hot well (not shown). The demineralized water device 13 is provided with main water pipes 14 at both sides and is communicated with the water inlet 11 and the water outlet 12 through the main water pipes 14. The main water pipe 14 is provided with a first inlet valve 141 at one side of the water inlet 11 and a first outlet valve 142 at one side of the water outlet 12, and raw water from the water inlet 11 is processed by the demineralized water device 13 to obtain demineralized water, and the demineralized water flows into a deaerator or a hot well from the water outlet 12 to be heated.
further, the chemical desalination water system 1 is provided with a second water pipe 15 and a third water pipe 16 which are respectively communicated with the main water pipe 14. The second water pipe 15 has one end connected to the left side of the first inlet valve 141 and the other end connected to the left side of the first outlet valve 142. The second water pipe 15 is provided with a second inlet valve 151 and a first check valve 152 at one side of the water inlet 11, the second inlet valve 151 is used for switching the raw water flowing into the second water pipe 15, and the first check valve 152 can prevent the raw water from flowing back. The second water pipe 15 is provided with a second outlet valve 153 and a second check valve 154 at one side of the water outlet 12, and the second outlet valve 153 is used for switching the water flow flowing into the water outlet 12. The third water pipe 16 has one end connected to the right side of the first inlet valve 141 and the other end connected to the right side of the first outlet valve 142. The third water pipe 16 is provided with a third inlet valve 161 and a third check valve 162 at a side of the water inlet 11. The third water pipe 16 is provided with a third outlet valve 163 and a fourth check valve 164 at a side of the water outlet 12.
the flue gas desulfurization system 2 further comprises a desulfurization tower 22 connected with one side of the flue gas condenser 21 and a demister 23 connected with the other side of the flue gas condenser 21, and flue gas desulfurized by the flue gas desulfurization system 2 flows into the atmosphere through a chimney 24. The flue gas condenser 21 comprises a cold source water inlet 211 and a cold source water outlet 212, wherein the cold source water inlet 211 is connected with the second water pipe 15, and the cold source water outlet 212 is connected with the third water pipe 16. A collecting device 25 for collecting the moisture extracted from the flue gas is arranged below the flue gas condenser 21 and the demister 23, the collecting device 25 can be selected as a water tank or a water pool, and the water in the collecting device 25 can be directly pumped into a raw water source. When the flue gas desulfurization system 2 works, wet and hot saturated flue gas after desulfurization of flue gas to be treated by the desulfurization tower 22 enters the flue gas condenser 21, is condensed by cold source water in the flue gas condenser 21, the temperature is reduced, water vapor is condensed, then the condensed flue gas enters the demister 23, the flue gas and fog drops are separated by inertia in the demister 23, the flue gas is discharged and enters the chimney 24, and the fog drops downwards enter the collecting device 25.
When the comprehensive treatment system is used for operation, in the heating season, because the temperature of the raw water source is lower, usually at 5-10 ℃, the water yield of the demineralized water device 13 is low, and the raw water source of the chemical demineralized water system 1 is used as cold source water of the flue gas condenser 21. The method specifically comprises the following steps:
S1: the first inlet valve 141 is closed, the second inlet valve 151 is opened, and the raw water flows into the second water pipe 15 along the second inlet valve 151 and enters the cold source water inlet 211 of the flue gas condenser 21;
s2: the third inlet valve 161 and the first outlet valve 142 are opened, and the raw water is condensed into the flue gas, flows into the third water pipe 16 through the cold source water outlet 212 of the flue gas condenser 21, and flows out of the first outlet valve 142 after being processed by the demineralized water device 13.
When the system is in the non-heating season, the effluent of the chemical desalted water system 1, namely desalted water, is used as cold source water of the flue gas condenser 21. The method specifically comprises the following steps:
S1: opening the first inlet valve 141, closing the second inlet valve 151 and the third inlet valve 161, and allowing the raw water to flow from the first inlet valve 141 to the desalted water unit 13 along the main water pipe 14 to obtain desalted water;
S2: the first outlet valve 142 is closed, the second outlet valve 153 is opened, and the demineralized water flows into the cold source water inlet 211 of the flue gas condenser 21 along the second water pipe 15 through the second outlet valve 153;
S3: the third outlet valve 163 is opened, and the desalted water is condensed into the flue gas, and then flows into the third water pipe 16 through the cold source water outlet 212 of the flue gas condenser 21 and flows out through the third outlet valve 163.
The utility model has the advantages that:
1. raw water is used as cold source water of the flue gas condenser in the heating season, so that on one hand, flue gas can be condensed to extract water, and water conservation and environmental protection are realized; on the other hand, after the cold source water is condensed, the temperature rises and flows into the chemical demineralized water system again and is treated by the demineralized water device, and the water yield of the demineralized water can be increased without additionally arranging a heating device at the water inlet;
2. In non-heating seasons, demineralized water is used as cold source water of the flue gas condenser, the demineralized water flows back to the water outlet after being condensed and heated in the flue gas condenser, and the demineralized water is heated, so that steam consumption of a deaerator or a hot well can be saved, and energy conservation is realized.
3. A moisture collecting device is arranged below the flue gas condenser and used for collecting moisture extracted from flue gas, and the water can be directly pumped into a raw water source, so that water conservation is further improved.
It should be noted that the above-mentioned preferred embodiments are only for illustrating the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (7)

1. The utility model provides a chemical desalination water and flue gas desulfurization integrated processing system, its includes chemical desalination water system (1), chemical desalination water system (1) includes main water pipe (14), its characterized in that: main water pipe (14) are equipped with first inlet valve (141), chemical desalination water system (1) still include with second water pipe (15) and third water pipe (16) that main water pipe (14) are linked together, second water pipe (15) and third water pipe (16) are located respectively first inlet valve (141) both sides, integrated processing system still includes flue gas desulfurization system (2), flue gas desulfurization system (2) include flue gas condenser (21), flue gas condenser (21) both ends respectively with second water pipe (15) and third water pipe (16) are linked together.
2. the integrated treatment system for chemical desalted water and flue gas desulfurization according to claim 1, characterized in that: the flue gas condenser (21) is provided with a cold source water inlet (211) connected with the second water pipe (15) and a cold source water outlet (212) connected with the third water pipe (16).
3. The integrated treatment system for chemical desalted water and flue gas desulfurization according to claim 1, characterized in that: the main water pipe (14) is provided with a water inlet (11) and a water outlet (12), the first inlet valve (141) is positioned on the side of the water inlet (11), and a first outlet valve (142) is positioned on the side of the water outlet (12).
4. the integrated treatment system for chemical desalted water and flue gas desulfurization according to claim 3, characterized in that: one end of the second water pipe (15) is connected to the left side of the first inlet valve (141), and the other end of the second water pipe is connected to the left side of the first outlet valve (142).
5. the integrated treatment system for chemical desalted water and flue gas desulfurization according to claim 4, characterized in that: the second water pipe (15) is provided with a second inlet valve (151) for switching on and off raw water and a first check valve (152) for preventing backflow on one side of the water inlet (11), and the second water pipe (15) is provided with a second outlet valve (153) and a second check valve (154) on one side of the water outlet (12).
6. The integrated treatment system for chemical desalted water and flue gas desulfurization according to claim 3, characterized in that: one end of the third water pipe (16) is connected to the right side of the first inlet valve (141), and the other end is connected to the right side of the first outlet valve (142).
7. The integrated treatment system for chemical desalted water and flue gas desulfurization according to claim 6, characterized in that: the third water pipe (16) is provided with a third inlet valve (161) and a third check valve (162) on one side of the water inlet (11), and the third water pipe (16) is provided with a third outlet valve (163) and a fourth check valve (164) on one side of the water outlet (12).
CN201822163018.XU 2018-12-21 2018-12-21 Chemical demineralized water and flue gas desulfurization integrated processing system Active CN209735285U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109395547A (en) * 2018-12-21 2019-03-01 聊城信源集团有限公司 A kind of chemical demineralizing water and flue gas desulfurization total system and its application method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109395547A (en) * 2018-12-21 2019-03-01 聊城信源集团有限公司 A kind of chemical demineralizing water and flue gas desulfurization total system and its application method

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