CN212669260U - Device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat - Google Patents
Device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat Download PDFInfo
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- CN212669260U CN212669260U CN202020667352.3U CN202020667352U CN212669260U CN 212669260 U CN212669260 U CN 212669260U CN 202020667352 U CN202020667352 U CN 202020667352U CN 212669260 U CN212669260 U CN 212669260U
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Abstract
The utility model discloses an utilize flue gas waste heat to realize device of desulfurization waste water zero release. The system comprises a boiler, an SCR denitration reactor, an air preheater, a first dust remover and a wet desulphurization device which are sequentially connected through a flue. An outlet flue of the SCR denitration reactor and an outlet flue of the air preheater are both communicated with an inlet flue of the drying tower through bypass flues; a waste water evaporation and concentration device is arranged between the first dust remover and the wet desulphurization device, and the wet desulphurization device is connected with a gypsum dehydration device. The intermediate-temperature flue gas between the first dust remover and the wet desulphurization device is used for concentrating and reducing the desulphurization wastewater, the wastewater amount entering a drying tower is reduced, the extraction amount of hot flue gas can be reduced, and the influence of the system on the boiler efficiency is effectively reduced. Meanwhile, the flue gas behind the SCR denitration reactor and the flue gas behind the air preheater are extracted to evaporate the waste water, so that the system energy efficiency can be effectively improved.
Description
Technical Field
The utility model relates to a thermoelectricity desulfurization waste water zero release technical field especially indicates a device that utilizes flue gas waste heat to realize desulfurization waste water zero release.
Background
In the water pollution prevention action plan formally published by State administration of 4 months in 2015, namely the Water Shi item, it is definitely proposed that the desulfurization wastewater of the thermal power plant belongs to high-pollution wastewater and must be strictly controlled. The desulfurization waste water composition is complicated, and the processing degree of difficulty is very big, how to make desulfurization waste water and administer, realizes that desulfurization waste water zero release becomes the important problem that coal fired power plant awaits the solution urgently.
The desulfurization wastewater has high pollutant content and large water quality fluctuation, contains a large amount of inorganic salt ions, heavy metals and the like, and has strong pollution to the environment. Many of the heavy metal ions are the first pollutants required to be controlled in the national environmental protection standard, so the desulfurization wastewater must be separately treated.
In the desulfurization wastewater zero discharge technology implemented at present, drying and evaporating atomized desulfurization wastewater by using a bypass drying tower is one of the technologies with the most application prospects. The bypass spray drying evaporation technology has the advantages of low cost, good economy, simple structure and easy operation, and can realize zero discharge of the desulfurization wastewater of the power plant. The high-speed rotary atomizer arranged in the bypass drying tower atomizes the desulfurization wastewater into micro droplets, hot flue gas before an air preheater introduced through a bypass flue is dried and evaporated, part of dried products enter an ash hopper at the bottom of the drying tower, and the rest of the dried products and the flue gas enter the electric dust remover together to be collected and collected.
Although the rotary atomization spray drying technology has simple process, less investment and low energy consumption, the slag at the bottom of the drying tower has higher sulfate radical and chloride ion content, and can not be used for mixing and matching concrete and only can be used for paving according to the regulations of mineral admixtures for high-strength and high-performance concrete (GB1T18736-2002), fly ash for cement and concrete (GBT 1596-. The existing rotary atomization spray drying technology directly mixes inorganic salt separated from the desulfurization waste water by evaporation into fly ash, thereby influencing the resource utilization of the fly ash. Meanwhile, the hot flue gas used for evaporating the desulfurization wastewater by the existing rotary spray drying technology is completely taken from the hot flue gas in front of the air preheater, so that the influence on the energy consumption of the boiler is large.
SUMMERY OF THE UTILITY MODEL
The utility model provides an utilize flue gas waste heat to realize device of desulfurization waste water zero release has solved the big problem of boiler energy consumption among the prior art.
The technical scheme of the utility model is realized like this:
a device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat comprises an SCR (selective catalytic reduction) denitration reactor, an air preheater, a first dust remover, a wet desulfurization device and a drying tower which are sequentially connected through a flue;
the boiler, the SCR denitration reactor, the air preheater, the first dust remover and the wet desulphurization device are sequentially connected through a flue;
the outlet flue of the SCR denitration reactor and the outlet flue of the air preheater are both communicated with the inlet flue of the drying tower through bypass flues;
a waste water evaporation and concentration device is arranged between the first dust remover and the wet desulphurization device, and the wet desulphurization device is connected with a gypsum dehydration device;
the water inlet of the waste water evaporation concentration device is communicated with the water outlet of the gypsum dehydration device, and the water outlet of the waste water evaporation concentration device is communicated with the water inlet of the drying tower;
and an inlet flue of the wastewater evaporation concentration device is communicated with an outlet flue of the first dust remover, and an outlet flue of the wastewater evaporation concentration device is communicated with an inlet flue of the wet desulphurization device.
Preferably, the drying tower further comprises a second dust remover, wherein an inlet flue of the second dust remover is communicated with an outlet flue of the drying tower, and an outlet flue of the second dust remover is communicated with an inlet flue of the first dust remover;
and the ash hoppers at the bottoms of the drying tower and the second dust remover are connected with a salt recovery device.
Preferably, the first dust remover is an electric dust remover, and the second dust remover is a cyclone separator.
Preferably, a flue between the SCR denitration reactor and the air preheater is communicated with a first bypass flue, and the first bypass flue is provided with an adjusting baffle plate for adjusting the amount of flue gas entering the bypass flue; the flue between the air preheater and the first dust remover is communicated with a second bypass flue; the second bypass flue is provided with an adjusting baffle plate for adjusting the amount of flue gas entering the bypass flue;
the outlet flue of the first bypass flue is communicated with the inlet flue of the drying tower, and the outlet flue of the second bypass flue is communicated with the first bypass flue.
Preferably, the waste water evaporation and concentration device comprises a box body;
an inlet flue, an outlet flue, a water inlet and a water outlet of the wastewater evaporation and concentration device are all communicated with the inner space of the box body;
the outlet flue of the wastewater evaporation concentration device is positioned above the liquid level in the box body, and the inlet flue and the water outlet of the wastewater evaporation concentration device are both positioned below the liquid level.
Preferably, an inlet flue of the drying tower is provided with an inlet baffle, and the inlet baffle adopts an adjusting execution structure;
and an outlet baffle is arranged in an outlet flue of the drying tower, and the outlet baffle adopts a switch-type execution structure.
Preferably, the drying tower is a rotary spray drying tower;
the upper part of the drying tower is provided with a volute type air distributor and a rotary atomizer;
the rotary atomizer is sleeved in the volute type air distributor, and the inlet end of the volute type air distributor is an inlet flue of the drying tower;
the inlet end of the rotary atomizer is a water inlet of the drying tower.
Preferably, an intermediate water path is arranged between the wastewater evaporation and concentration device and the drying tower;
the middle waterway comprises a filtering device, a wastewater lifting pump and a high-level wastewater tank;
the water inlet of the filtering device is communicated with the water outlet of the wastewater evaporative concentration device, the water outlet of the filtering device is communicated with the water inlet of the high-level water tank, the water outlet of the high-level water tank is communicated with the water inlet of the drying tower, and the wastewater lift pump is arranged on a connecting pipeline between the high-level water tank and the filtering device.
Preferably, the wet desulphurization device is further connected with a gypsum discharge device.
Advantageous effects
The technical proposal of the utility model utilizes the medium temperature flue gas (80-120 ℃) between the first dust remover and the wet desulphurization device to firstly carry out concentration and decrement treatment on the desulphurization waste water, the concentration is about 10 to 50 percent of the original waste water amount, the waste water amount entering the drying tower is reduced, the extraction amount of the hot flue gas can be reduced, and the influence of the system on the boiler efficiency is effectively reduced; simultaneously, the temperature of the flue gas at the inlet of the wet desulphurization device can be reduced, the humidity of the flue gas can be improved, and the SO in the flue gas by the wet desulphurization device can be improved2The absorption efficiency of the wet desulphurization device is improved, and the water replenishing of the wet desulphurization device is reduced.
According to the invention, the flue gas behind the SCR denitration reactor and the flue gas behind the air preheater are simultaneously extracted to evaporate the wastewater, so that the system energy efficiency can be effectively improved.
Through set up the second dust remover at the drying tower outlet, can carry out the entrapment to the chlorine-containing crystallization product that desulfurization waste water evaporation was appeared to get into the salinity recovery system with drying tower bottom exhaust lime-ash together, can prevent to appear in the salinity gets into main system flue gas, reduce the influence to fly ash resourceization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is the schematic structural diagram of the device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat provided by the utility model.
Wherein:
1: a boiler; 2: an SCR denitration reactor; 3: an air preheater; 4: a drying tower; 5: a first dust remover; 6: a waste water evaporation and concentration device; 7: a wet desulfurization unit; 8: a second dust remover; 9: a gypsum dewatering device; 10: a gypsum discharge device; 11: a filtration device; 12: a wastewater lift pump; 13: a high level wastewater tank; 14: a salt recovery device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides a device for realizing zero emission of desulfurization wastewater by using flue gas waste heat, which includes an SCR denitration reactor 2, an air preheater 3, a first dust remover 5, a wet desulfurization device 7, and a drying tower 4, which are sequentially connected through a flue.
Boiler 1, SCR denitration reactor 2, air heater 3, first dust remover 5 and wet flue gas desulfurization device 7 connect gradually through the flue.
And an outlet flue of the SCR denitration reactor 2 and an outlet flue of the air preheater 3 are communicated with an inlet flue of the drying tower 4 through bypass flues.
A waste water evaporation and concentration device 6 is arranged between the first dust remover 5 and the wet desulphurization device 7, and the wet desulphurization device 7 is connected with a gypsum dehydration device 9.
The water inlet of the waste water evaporation concentration device 6 is communicated with the water outlet of the gypsum dehydration device 9, and the water outlet of the waste water evaporation concentration device 6 is communicated with the water inlet of the drying tower 4.
An inlet flue of the waste water evaporation and concentration device 6 is communicated with an outlet flue of the first dust remover 5, and an outlet flue of the waste water evaporation and concentration device 6 is communicated with an inlet flue of the wet desulphurization device 7.
Can be concentrated in waste water evaporation concentration device 6 by 9 exhaust desulfurization waste water of gypsum dewatering device, the waste water volume in getting into drying tower 4 has been reduced, therefore, the required hot flue gas volume of 4 dry waste water of drying tower has been reduced, the required flue gas of drying tower 4 comes from the boiler flue gas (air heater 3 can utilize the boiler flue gas to heat the air that gets into boiler 1, realize the thermal reutilization of boiler exhaust gas), the required flue gas volume of 4 dry waste water of drying tower has been reduced, the heat of corresponding 1 reutilization of boiler can increase, therefore, can effectively reduce the influence of system to boiler 1 efficiency.
One part of the flue gas extracted by the drying tower 4 comes from the outlet flue of the SCR denitration reactor 2, and the other part of the flue gas comes from the outlet flue of the air preheater 3, namely, the flue gas after heat exchange of the air preheater 3 is subjected to secondary heat recovery, so that the energy utilization efficiency is improved, and the influence of the system on the boiler efficiency is further reduced.
Through the arrangement of the waste water evaporation concentration device 6, the temperature of the flue gas at the inlet of the wet desulphurization device 7 is reduced, the humidity of the flue gas is improved, and the SO in the flue gas by the wet desulphurization device 7 can be improved2The absorption efficiency of the wet desulphurization device is improved, and the water replenishing of the wet desulphurization device is reduced.
The device for realizing zero emission of desulfurization wastewater by using the waste heat of flue gas further comprises a second dust remover 8, wherein an inlet flue of the second dust remover 8 is communicated with an outlet flue of the drying tower 4, and an outlet flue of the second dust remover 8 is communicated with an inlet flue of the first dust remover 5. The ash hoppers at the bottom of both the drying tower 4 and the second dust collector 8 are connected with a salt recovery device 14.
Through set up second dust remover 8 at drying tower 4 export, can carry out the entrapment to the chlorine containing crystallization product that desulfurization waste water evaporation was separated out to get into salinity recovery unit 14 with the lime-ash that the drying tower 4 bottom was discharged together, can prevent that the salt that separates out from going into main ash storehouse, reduce the influence to fly ash resourceization.
The first dust remover 5 is an electric dust remover, and the second dust remover 8 is a cyclone dust removal separator. The air intake of the second dust remover 8 is small, and the dust remover is a small dust remover.
In the present embodiment, a specific communication manner between the drying tower 4 and the main flue (the flue formed between the boiler, the SCR denitration reactor, the air preheater, the first dust collector, and the wet desulfurization device) is also provided.
And a first bypass flue is communicated with a flue between the SCR denitration reactor 2 and the air preheater 3, and an adjusting baffle is arranged on the first bypass flue and used for adjusting the amount of flue gas entering the bypass flue. And a second bypass flue is communicated with a flue between the air preheater 3 and the first dust remover 5, and an adjusting baffle is arranged on the second bypass flue and used for adjusting the amount of flue gas entering the bypass flue.
The outlet flue of the first bypass flue is communicated with the inlet flue of the drying tower 4, the outlet flue of the second bypass flue is communicated with the first bypass flue, and the connection point is positioned between the first bypass flue adjusting baffle and the drying tower 4.
The above is an embodiment in which the drying tower 4 is communicated with the main flue, and it is needless to say that the arrangement form of the first bypass flue and the second bypass flue may be appropriately changed according to the implementation requirement, as long as the extraction of the flue gas before entering the air preheater 3 or the flue gas exhausted from the air preheater 3 can be realized. For example, the first bypass stack and the second bypass stack may be two stacks arranged in parallel.
Flue gas discharged from the first dust remover 5 enters the wastewater evaporation concentration device 6 from the bottom, the wastewater evaporation concentration device 6 carries out concentration and decrement on the atomized desulfurization wastewater, and then the flue gas is discharged from the top of the wastewater evaporation concentration device and enters the wet desulphurization device 7. The specific composition structure of the wastewater evaporative concentration device 7 is as follows:
the waste water evaporation and concentration device 7 comprises a box body.
The inlet flue, the outlet flue, the water inlet and the water outlet of the waste water evaporation and concentration device 7 are communicated with the inner space of the box body. The outlet flue of the waste water evaporation and concentration device is positioned above the liquid level in the box body, and the inlet flue and the water outlet of the waste water evaporation and concentration device are both positioned below the liquid level.
The waste water evaporation and concentration device 7 with the structure can ensure that the flue gas entering the device can be fully contacted with the desulfurization waste water, and improve the utilization rate of the waste heat in the flue gas and the concentration degree of the waste water.
An inlet flue of the drying tower 4 is provided with an inlet baffle which adopts an adjusting execution structure and is used for adjusting the flow of hot flue gas entering the drying tower 4.
An outlet baffle is arranged in an outlet flue of the drying tower 4, and the outlet baffle adopts a switch type execution structure and is used for controlling the opening and closing of the outlet flue of the drying tower 4.
The drying tower 4 is a rotary spray drying tower, and a volute type air distributor and a rotary atomizer are arranged at the upper part of the drying tower 4.
The rotary atomizer is sleeved in the volute type air distributor, and the inlet end of the volute type air distributor is an inlet flue of the drying tower.
The inlet end of the rotary atomizer is a water inlet of the drying tower.
The structure of the matching of the rotary spray drying tower and the volute type air distributor enables the hot flue gas and atomized wastewater fog drops to fully exchange heat in the drying tower 4, and rapid drying is realized. Volute type air distributor can make the flue gas that gets into drying tower 4 form rotatory air current, and the waste water atomizing that rotatory atomizer will get into the drying tower becomes tiny fog drop, and flue gas and tiny fog drop contact evaporate the salt particle of separating out, and thick salt particle falls into the bottom of drying tower 4, and the air current that the tiny particle received gets into second dust remover 8, and the tiny particle finally falls into the bottom of second dust remover 8.
An intermediate water channel is arranged between the waste water evaporation and concentration device 6 and the drying tower 4. The intermediate waterway comprises a filter unit 11, a wastewater lift pump 12 and a high level wastewater tank 13.
The water inlet of the filtering device 11 is communicated with the water outlet of the waste water evaporation and concentration device 6, the water outlet of the filtering device 11 is communicated with the water inlet of the high-level waste water tank 13, the water outlet of the high-level waste water tank 13 is communicated with the water inlet of the drying tower 4, and the waste water lift pump 12 is arranged on a connecting pipeline between the high-level waste water tank 13 and the filtering device 11.
The desulfurized wastewater at the water outlet of the wastewater evaporation concentration device 6 enters a filtering device 11 to remove solid suspended substances in the wastewater, and Ca (OH) is added2The slurry is tempered to a pH of about 9-10, a wastewater lift pump 12 can provide power for conveying wastewater to the drying tower 4, and a high-level wastewater tank 13 is used for storing wastewater.
The wet desulphurization device 7 is also connected with a gypsum discharge device 10 for discharging gypsum in the wet desulphurization device 7.
In this embodiment, in order to further explain the above-mentioned device for realizing zero emission of wastewater from desulfurization by using waste heat of flue gas, a method for realizing zero emission of wastewater from desulfurization by using waste heat of flue gas is also provided. The specific description is as follows:
the desulfurization waste water passes through a waste water evaporation concentration device 6 of a first dust remover 5 to be concentrated and reduced to about 10-50% of the original desulfurization waste water, the desulfurization waste water at the water outlet of the waste water evaporation concentration device 6 enters a filtering device 11 to remove solid suspended matters in the waste water, and Ca (OH) is added2The slurry is tempered to pH of about 9-10, and is atomized into fine fog drops through a rotary atomizer through a high-level wastewater tank 13 after being uniformly mixed, and the fine fog drops are sprayed into a drying tower 4, and hot flue gas between an SCR denitration reactor 2 and an air preheater 3 is used as a heat source for drying, and simultaneously, medium-low temperature flue gas between the air preheater 3 and a first dust remover 5 is introduced as a secondary heat source; the flue gas at the outlet of the drying tower 4 passes through a second dust remover 8 to collect salt particles evaporated and separated from the waste water, and is driedThe ash discharged from the ash hopper at the bottom of the drying tower 4 enters the salt recovery device 14.
Wherein: the gas introduced into the drying tower 4 from the SCR denitration reactor 2 accounts for 1-3% of the total exhaust amount of the boiler; the gas introduced into the drying tower 4 by the air preheater 3 accounts for 3-5% of the total exhaust amount of the boiler.
In summary, the device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat provided by the embodiment has the following effects:
the desulfurization wastewater is concentrated and reduced to about 50 to 60 percent of the original wastewater amount by utilizing the medium-temperature flue gas (80 to 120 ℃) between the first dust remover 5 and the wet desulfurization device 7, the wastewater amount entering the drying tower 4 is reduced, the extracted hot flue gas amount is obviously reduced, and the influence of the system on the efficiency of the boiler 1 can be effectively reduced; simultaneously, the temperature of the flue gas at the inlet of the wet desulphurization device 7 is reduced, the humidity of the flue gas is improved, and the SO in the flue gas by the wet desulphurization device 7 can be improved2And the water supply of the wet desulfurization device 7 is reduced.
According to the invention, the flue gas behind the SCR denitration reactor 2 and the flue gas behind the air preheater 3 are simultaneously extracted to evaporate the wastewater, so that the system energy efficiency can be effectively improved.
Through set up second dust remover 8 at drying tower 4 export, can carry out the entrapment to the chlorine-containing crystallization product that desulfurization waste water evaporation was separated out to get into the salinity recovery system with the lime-ash of 4 bottoms discharge of drying tower together, can prevent to separate out during the salinity gets into main system flue gas, reduce the influence to fly ash resourceization.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides an utilize flue gas waste heat to realize device of desulfurization waste water zero release which characterized in that: the device comprises an SCR denitration reactor, an air preheater, a first dust remover, a wet desulphurization device and a drying tower which are sequentially connected through a flue;
the boiler, the SCR denitration reactor, the air preheater, the first dust remover and the wet desulphurization device are sequentially connected through a flue;
the outlet flue of the SCR denitration reactor and the outlet flue of the air preheater are both communicated with the inlet flue of the drying tower through bypass flues;
a waste water evaporation and concentration device is arranged between the first dust remover and the wet desulphurization device, and the wet desulphurization device is connected with a gypsum dehydration device;
the water inlet of the waste water evaporation concentration device is communicated with the water outlet of the gypsum dehydration device, and the water outlet of the waste water evaporation concentration device is communicated with the water inlet of the drying tower;
and an inlet flue of the wastewater evaporation concentration device is communicated with an outlet flue of the first dust remover, and an outlet flue of the wastewater evaporation concentration device is communicated with an inlet flue of the wet desulphurization device.
2. The device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat according to claim 1, characterized in that: the inlet flue of the second dust remover is communicated with the outlet flue of the drying tower, and the outlet flue of the second dust remover is communicated with the inlet flue of the first dust remover;
and the ash hoppers at the bottoms of the drying tower and the second dust remover are connected with a salt recovery device.
3. The device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat according to claim 2, characterized in that: the first dust remover is an electric dust remover, and the second dust remover is a cyclone separator.
4. The device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat according to claim 1, characterized in that: a first bypass flue is communicated with a flue between the SCR denitration reactor and the air preheater, and an adjusting baffle is arranged on the first bypass flue and used for adjusting the amount of flue gas entering the bypass flue; a second bypass flue is communicated with a flue between the air preheater and the first dust remover, and an adjusting baffle is arranged on the second bypass flue and used for adjusting the amount of flue gas entering the bypass flue;
the outlet flue of the first bypass flue is communicated with the inlet flue of the drying tower, and the outlet flue of the second bypass flue is communicated with the first bypass flue.
5. The device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat according to claim 1, characterized in that: the waste water evaporation and concentration device comprises a box body;
an inlet flue, an outlet flue, a water inlet and a water outlet of the wastewater evaporation and concentration device are all communicated with the inner space of the box body;
the outlet flue of the wastewater evaporation concentration device is positioned above the liquid level in the box body, and the inlet flue and the water outlet of the wastewater evaporation concentration device are both positioned below the liquid level.
6. The device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat according to claim 1, characterized in that: an inlet flue of the drying tower is provided with an inlet baffle which adopts an adjusting execution structure;
and an outlet baffle is arranged in an outlet flue of the drying tower, and the outlet baffle adopts a switch-type execution structure.
7. The device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat according to claim 1, characterized in that: the drying tower is a rotary spray drying tower;
the upper part of the drying tower is provided with a volute type air distributor and a rotary atomizer;
the rotary atomizer is sleeved in the volute type air distributor, and the inlet end of the volute type air distributor is an inlet flue of the drying tower;
the inlet end of the rotary atomizer is a water inlet of the drying tower.
8. The device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat according to claim 1, characterized in that: an intermediate water path is arranged between the waste water evaporation and concentration device and the drying tower;
the middle waterway comprises a filtering device, a wastewater lifting pump and a high-level wastewater tank;
the water inlet of the filtering device is communicated with the water outlet of the wastewater evaporative concentration device, the water outlet of the filtering device is communicated with the water inlet of the high-level water tank, the water outlet of the high-level water tank is communicated with the water inlet of the drying tower, and the wastewater lift pump is arranged on a connecting pipeline between the high-level water tank and the filtering device.
9. The device for realizing zero discharge of desulfurization wastewater by using flue gas waste heat according to claim 1, characterized in that: the wet desulphurization device is also connected with a gypsum discharge device.
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Cited By (1)
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| CN111792690A (en) * | 2020-04-27 | 2020-10-20 | 大唐环境产业集团股份有限公司 | Device and method for realizing zero discharge of desulfurization wastewater by using flue gas waste heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111792690A (en) * | 2020-04-27 | 2020-10-20 | 大唐环境产业集团股份有限公司 | Device and method for realizing zero discharge of desulfurization wastewater by using flue gas waste heat |
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