CN218202269U - Desulfurization wastewater treatment system without energy consumption - Google Patents
Desulfurization wastewater treatment system without energy consumption Download PDFInfo
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- CN218202269U CN218202269U CN202221687528.7U CN202221687528U CN218202269U CN 218202269 U CN218202269 U CN 218202269U CN 202221687528 U CN202221687528 U CN 202221687528U CN 218202269 U CN218202269 U CN 218202269U
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Abstract
The application discloses a desulfurization wastewater treatment system without energy consumption, which comprises a desulfurization wastewater pool, a desulfurization wastewater feeding pump, a high-temperature heat exchanger, a negative pressure flash separator, a low-temperature heat exchanger, a low-temperature heater and a condensate system, wherein the desulfurization wastewater pool, the desulfurization wastewater feeding pump, the high-temperature heat exchanger, the negative pressure flash separator, the low-temperature heat exchanger, the low-temperature heater and the condensate system are connected through pipelines; the desulfurization wastewater in the desulfurization wastewater pool is conveyed into the high-temperature heat exchanger by the desulfurization wastewater feeding pump, the hot-end high-temperature water of the condensed water system is conveyed into the high-temperature heat exchanger to be used as a heat exchange medium to heat the desulfurization wastewater, and then the desulfurization wastewater is conveyed to the negative-pressure flash separator to be subjected to flash separation, the flash-separated saturated steam enters the low-temperature heat exchanger, the condensed water subjected to heat exchange and temperature reduction in the high-temperature heat exchanger enters the low-temperature heat exchanger to be used as a heat exchange medium to absorb the heat of the saturated steam, the heat is heated, the condensed water enters the low-temperature heater to be heated and then returns to the hot end of the condensed water system, and meanwhile, the saturated steam in the low-temperature heat exchanger is rapidly condensed into qualified water to be discharged.
Description
Technical Field
The application belongs to the technical field of industrial wastewater treatment, and particularly relates to a desulfurization wastewater treatment system without energy consumption.
Background
The State Council promulgates 'action plan for water pollution' in 2015, and the environmental protection department promulgates 'technical policy for pollution control of thermal power plants' in 2017, so that the thermal power plants are encouraged to realize wastewater recycling. With the improvement of environmental protection requirements, zero discharge of wastewater becomes a main development direction.
Limestone-gypsum Wet Flue Gas Desulfurization (WFGD) has high desulfurization efficiency and mature technology, and is widely applied to domestic and foreign coal-fired power plants. More than 80% of domestic coal-fired power plants use WFGD, the technology uses slurry containing limestone to wash flue gas SO as to remove SO2 in the flue gas, and in order to avoid adverse effects on a system caused by enrichment of fluorine ions and chloride ions in the desulfurization slurry, desulfurization wastewater needs to be discharged periodically SO as to maintain the balance of chloride ions in the system. As the most difficult and most main tail end waste water of a power plant, the desulfurization waste water has various pollutants, suspended matters, salt content, heavy metals, fluoride, effluent Chemical Oxygen Demand (COD) and the like all exceed the national discharge standard, and the desulfurization waste water has strong pollution and great treatment difficulty. In order to meet the environmental protection requirement of zero discharge of wastewater of a power plant, various desulfurization wastewater zero discharge processes are continuously developed, and the process flow can be basically divided into pretreatment, concentration and decrement and terminal treatment. The concentration and decrement process and the terminal deep desalination process are key points of zero emission process research and development, and membrane concentration and decrement methods such as ultrafiltration, reverse osmosis, forward osmosis, electrodialysis, membrane distillation and the like, steam evaporation and crystallization, flue gas waste heat evaporation and slag waste heat comprehensive utilization appear.
In conclusion, how to solve the problem of treating the desulfurization wastewater of the coal-fired thermal power plant becomes a problem to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
To above-mentioned problem, this application embodiment provides a desulfurization wastewater treatment system does not have energy consumption, and this application make full use of reasonable self resource provides the heat source through the condensate system in the factory, satisfies the demand of coal-fired thermal power plant desulfurization waste water zero release, technical scheme is as follows:
the application provides a desulfurization wastewater treatment system without energy consumption, which comprises a desulfurization wastewater pool, a desulfurization wastewater feeding pump, a high-temperature heat exchanger, a negative pressure flash separator, a low-temperature heat exchanger, a low-temperature heater and a condensate system, wherein the desulfurization wastewater pool, the desulfurization wastewater feeding pump, the high-temperature heat exchanger, the negative pressure flash separator, the low-temperature heat exchanger, the low-temperature heater and the condensate system are connected through pipelines; the desulfurization wastewater in the desulfurization wastewater pool is conveyed into the high-temperature heat exchanger by the desulfurization wastewater feeding pump, the hot-end high-temperature water of the condensed water system is conveyed into the high-temperature heat exchanger to be used as a heat exchange medium to heat the desulfurization wastewater, and then the desulfurization wastewater is conveyed into the negative-pressure flash separator to be subjected to flash separation, the flash-evaporated saturated steam enters the low-temperature heat exchanger, the condensed water after heat exchange and temperature reduction in the high-temperature heat exchanger enters the low-temperature heat exchanger to be used as a heat exchange medium to absorb the heat of the saturated steam, the heat is heated, the condensed water enters the low-temperature heater to be heated and then returns to the hot end of the condensed water system, and meanwhile, the saturated steam in the low-temperature heat exchanger is rapidly condensed into qualified water to be discharged.
For example, in the desulfurization wastewater treatment system without energy consumption provided in an embodiment, the desulfurization wastewater feed pump conveys desulfurization wastewater in the desulfurization wastewater pool into the high-temperature heat exchanger, the hot-end high-temperature water of the condensed water system is conveyed into the high-temperature heat exchanger as a heat exchange medium to heat the desulfurization wastewater, and then conveyed to the negative-pressure flash separator for flash separation, the flashed saturated steam enters the low-temperature heat exchanger, the cold-end low-temperature water of the condensed water system is conveyed into the low-temperature heat exchanger as a heat exchange medium to absorb heat of the saturated steam for heat exchange and raise temperature, and then enters the low-temperature heater to heat and then return to the hot end of the condensed water system, meanwhile, the saturated steam in the low-temperature heat exchanger is rapidly condensed into qualified water to be discharged, and the condensed water after temperature reduction in the high-temperature heat exchanger enters the low-temperature heater to heat and then returns to the hot end of the condensed water system.
For example, in the system for treating desulfurization waste water without energy consumption provided by an embodiment, a crystallizer connected with the negative pressure flash separator and a solid collecting bin connected with the crystallizer are further included, a concentrated solution formed after desulfurization waste water is flashed by the negative pressure flash separator is subjected to solid-liquid separation by the crystallizer, and solids are collected by the solid collecting bin.
For example, in one embodiment, the energy-saving desulfurization wastewater treatment system is provided, wherein the negative pressure flash separator is in a vacuum state and the back pressure is 13 kilopascals.
For example, in the energy-consumption-free desulfurization wastewater treatment system provided by an embodiment, a concentrated solution circulating and conveying pump is arranged on a pipeline connecting the negative pressure flash separator and the desulfurization wastewater feeding pump, so that the separated liquid is circulated in the system and flashed into steam.
For example, in the desulfurization waste water treatment system without energy consumption provided in an embodiment, the desulfurization waste water treatment system further includes a condensed water pipeline, and the condensed water after heat exchange and temperature reduction in the high-temperature heat exchanger enters the low-temperature heat exchanger through the condensed water pipeline as a heat exchange medium to absorb heat of the saturated steam, and enters the low-temperature heater to be heated and then returns to the hot end of the condensed water system after heat exchange and temperature rise.
For example, in the desulfurization waste water treatment system without energy consumption provided by an embodiment, the condensed water after heat exchange and temperature rise in the low-temperature heat exchanger is conveyed to the low-temperature heater through a first conveying pump.
For example, in the desulfurization waste water treatment system without energy consumption provided by one embodiment, the hot-end high-temperature water of the condensed water system is conveyed into the high-temperature heat exchanger through a second conveying pump, and the cold-end condensed water of the condensed water system is conveyed into the low-temperature heat exchanger through a third conveying pump.
For example, in the non-energy consumption desulfurization wastewater treatment system provided by one embodiment, the desulfurization wastewater feed pump conveys desulfurization wastewater in the desulfurization wastewater pool into the high-temperature heat exchanger, and the desulfurization wastewater is heated to 51 ℃ by the hot-end high-temperature water of the condensate system and then conveyed to the negative-pressure flash separator for flash evaporation.
For example, in the energy-free desulfurization wastewater treatment system provided by one embodiment, the negative pressure flash separator flashes the desulfurization wastewater into saturated steam and solid miscellaneous salts, the saturated steam is dead steam, and the solid miscellaneous salts are collected by the solid collection bin.
The utility model provides a beneficial effect that no energy consumption desulfurization effluent disposal system brought does: the system and the method are simple and convenient, the original equipment is fully utilized, the increased equipment is less, the investment is low, the occupied area is small, the energy is saved, the consumption is reduced, and the final products are solid miscellaneous salt and qualified water.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow diagram of an energy-efficient desulfurization wastewater treatment system according to an embodiment of the present application;
FIG. 2 is a flow diagram of a desulfurization waste water treatment system without energy consumption according to another embodiment of the present application;
FIG. 3 is a schematic diagram of the desulfurization waste water treatment system without energy consumption.
Reference numerals are as follows: 1-a desulfurization wastewater pool, 2-a desulfurization wastewater feeding pump, 3-a high-temperature heat exchanger, 4-a negative pressure flash separator, 5-a crystallizer, 6-a solid collecting bin, 7-a low-temperature heat exchanger, 8-a first delivery pump, 9-qualified water, 10-a low-temperature heater, 11-a condensate system, 12-a second delivery pump, 13-a concentrated slurry circulating delivery pump, 14-a condensate pipeline and 15-a third delivery pump.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The application provides a non-energy consumption desulfurization wastewater treatment system, as shown in fig. 1, a first embodiment is provided, which comprises a desulfurization wastewater pool 1, a desulfurization wastewater feed pump 2, a high-temperature heat exchanger 3, a negative pressure flash separator 4, a low-temperature heat exchanger 7, a low-temperature heater 10 and a condensate system 11 which are connected through pipelines, wherein the condensate system 11 comprises a hot end and a cold end; the desulfurization wastewater in the desulfurization wastewater pool 1 is conveyed into the high-temperature heat exchanger 3 by the desulfurization wastewater feeding pump 2, the high-temperature water at the hot end of the condensate system 11 is conveyed into the high-temperature heat exchanger 3 to be used as a heat exchange medium to heat the desulfurization wastewater, and then the desulfurization wastewater is conveyed to the negative-pressure flash separator 4 to be subjected to flash separation, the flash-evaporated saturated steam enters the low-temperature heat exchanger 7, the condensate after heat exchange and temperature reduction in the high-temperature heat exchanger 3 enters the low-temperature heat exchanger 7 to be used as a heat exchange medium to absorb the heat of the saturated steam, the heat is heated and then enters the low-temperature heater 10 to be heated and then returned to the hot end of the condensate system 11, and meanwhile, the saturated steam in the low-temperature heat exchanger 7 is rapidly condensed into qualified water to be discharged. According to the embodiment, the condensed water system of the coal-fired power plant is fully utilized, and self resources are fully and reasonably utilized on the premise that the safety and stable operation of a unit are not influenced and the efficiency of a boiler is not influenced. Provide the heat source through the condensate system in the factory, the heat exchanger fully satisfies promotes desulfurization waste water temperature demand, and heat exchange efficiency is high. The system of this application has satisfied twice heat transfer demand: in the high-temperature heat exchanger 3 for the first time, the waste heat of a condensed water system is fully utilized, and the requirement on external energy is reduced; in the low-temperature heat exchanger 7 for the second time, the condensed water after heat exchange and temperature reduction of the high-temperature heat exchanger 3 is used as a heat exchange medium again efficiently and economically, so that not only is the saturated steam condensed into water and discharged, but also the steam waste heat is secondarily utilized. The low-temperature water after the high-temperature water at the hot end of the condensate water system 11 is utilized by the high-temperature heat exchanger 3 and the low-temperature heat exchanger 7 is heated to 140 ℃ by the low-temperature heater 10 and then returns to the hot end of the condensate water system 11, so that the cyclic utilization and the full absorption and utilization of heat are realized.
Wherein, the medium in the high-temperature heat exchanger 3 is high-temperature hot water provided by a condensate system, the temperature can reach 140 ℃, and the heat exchange efficiency can reach 99 percent through the heat exchange between water and water. For example, 10 tons of desulfurization waste water are conveyed to the high-temperature heat exchanger 3 by the desulfurization waste water feed pump 2, the high-temperature heat exchanger 3 only needs 4.3 tons of high-temperature condensed water, and the self condensed water system of the power plant is adopted as a heat source of the high-temperature heat exchanger 3, so that the waste heat is fully and reasonably utilized, and the purposes of saving energy and reducing consumption are achieved. Saturated steam generated after flash evaporation through the negative pressure flash evaporation separator 4 is exhaust steam, the exhaust steam can be rapidly condensed into qualified water through the low-temperature heat exchanger 7, and the qualified water can be reused. The condensed water after heat exchange and temperature reduction in the high-temperature heat exchanger 3 is used as a medium of the low-temperature heat exchanger 7, so that exhaust steam is promoted to be condensed into water quickly, the heat of the exhaust steam is absorbed to heat the low-temperature condensed water and return the low-temperature condensed water to the hot end of a condensed water system, and recycling is realized efficiently and economically.
The negative pressure flash separator 4 and the high temperature heat exchanger 3 are separately arranged, materials with good heat exchange performance and excellent corrosion resistance can be adopted, the scaling risk can be greatly reduced, and the cleaning frequency is reduced.
As a variation of the present non-energy consumption desulfurization wastewater treatment system, as shown in fig. 2, a second embodiment is provided, which includes a desulfurization wastewater tank 1, a desulfurization wastewater feed pump 2, a high-temperature heat exchanger 3, a negative pressure flash separator 4, a low-temperature heat exchanger 7, a low-temperature heater 10, and a condensate system 11, which are connected by a pipeline; the desulfurization wastewater in the desulfurization wastewater pool 1 is conveyed into the high-temperature heat exchanger 3 by the desulfurization wastewater feeding pump 2, the hot-end high-temperature water in the condensate system 11 is conveyed into the high-temperature heat exchanger 3 to serve as a heat exchange medium to heat the desulfurization wastewater, and then conveyed to the negative-pressure flash separator 4 to be subjected to flash evaporation, the flash evaporated saturated steam enters the low-temperature heat exchanger 7, the cold-end low-temperature water in the condensate system 11 is conveyed into the low-temperature heat exchanger 7 to serve as a heat exchange medium to absorb the heat of the saturated steam, the heat is heated, the low-temperature water enters the low-temperature heater 10 to be heated and then returns to the hot end of the condensate system 11, meanwhile, the saturated steam in the low-temperature heat exchanger 7 is rapidly condensed into qualified water to be discharged, and the condensate water after heat exchange and temperature reduction in the high-temperature heat exchanger 3 enters the low-temperature heater 10 to be heated and then returns to the hot end of the condensate system 11. According to the embodiment, the condensed water system of the coal-fired power plant is fully utilized, and self resources are fully and reasonably utilized on the premise that the safety and stable operation of a unit are not influenced and the efficiency of a boiler is not influenced. Provide the heat source through the condensate system in the factory, the heat exchanger fully satisfies promotes desulfurization waste water temperature demand, and heat exchange efficiency is high.
The system schematic diagram of the two embodiments of the energy-free desulfurization wastewater treatment system shown in FIGS. 1 and 2 of the present application is shown in FIG. 3.
For example, in the energy-consumption-free desulfurization wastewater treatment system provided in one embodiment, as shown in fig. 1 and fig. 2, a crystallizer 5 connected to the negative pressure flash separator 4 and a solid collecting bin 6 connected to the crystallizer 5 are further included, a concentrated solution formed after desulfurization wastewater is flashed by the negative pressure flash separator 4 is subjected to solid-liquid separation by the crystallizer 5, and solids are collected by the solid collecting bin 6. According to the embodiment, the solid collecting bin 6 is tightly connected with the negative pressure flash separator 4, solid miscellaneous salt after the desulfurization wastewater at 51 ℃ is flashed can rapidly drop into the solid collecting bin 6, and centralized recovery is realized.
For example, in the energy-consumption-free desulfurization wastewater treatment system provided by one embodiment, the negative pressure flash separator 4 is in a vacuum state, and the back pressure is 13 kpa. According to the above embodiment, the negative pressure flash separator 4 is in a vacuum state, and the back pressure is 13kPa, so that the odor can be effectively prevented from overflowing.
According to the above embodiment, the negative pressure flash separator 4 can also be understood as a vapor-solid separator, which is used for flashing the desulfurization wastewater at 51 ℃ after passing through the high temperature heat exchanger 3 to flash the desulfurization wastewater into saturated vapor and solid miscellaneous salts. The interior of the negative pressure flash separator 4 is in a vacuum state, the back pressure is 13kpa, desulfurization wastewater at 51 ℃ can be quickly flashed in the vacuum state, the flash tank of the negative pressure flash separator 4 and the crystallizer 5 are designed to be Cheng Hulian short, the optimal tube pass direction and the shortest tube pass distance are designed by coordinating and optimizing the corresponding positions of the outlet of the crystallizer 5 and the inlet of the flash tank, the condition that a pipeline is blocked by crystallization of a high-concentration salt solution in the tube pass is avoided, meanwhile, the heat loss of the high-concentration salt solution in the tube pass flow is reduced to the maximum degree, and solid miscellaneous salt can be obtained after evaporation and crystallization.
For example, in the non-energy consumption desulfurization waste water treatment system provided in one embodiment, as shown in fig. 1 and 2, a concentrated liquid circulation transfer pump 13 is provided on a pipeline connecting the negative pressure flash separator 4 and the desulfurization waste water feed pump 2, so as to circulate the separated liquid in the system and flash the separated liquid into steam. According to the embodiment, the recycling of the desulfurization wastewater concentrated solution can be realized, and the desulfurization wastewater is continuously recycled and evaporated in the whole treatment system.
For example, in an embodiment of the desulfurization waste water treatment system without energy consumption, as shown in fig. 1, a condensate water pipeline 14 is further included, and the condensate water after heat exchange and temperature reduction in the high-temperature heat exchanger 3 passes through the condensate water pipeline 14 and then enters the low-temperature heat exchanger 7 as a heat exchange medium to absorb heat of the saturated steam, heat the condensate water, and then enters the low-temperature heater 10 to heat and then return to the hot end of the condensate water system 11.
For example, in the desulfurization waste water treatment system without energy consumption provided by an embodiment, as shown in fig. 1, the condensed water after heat exchange and temperature increase in the low-temperature heat exchanger 7 is delivered to the low-temperature heater 10 by the first delivery pump 8.
For example, in the desulfurization waste water treatment system without energy consumption provided by an embodiment, as shown in fig. 2, the hot-end high-temperature water of the condensate system 11 is delivered into the high-temperature heat exchanger 3 by the second delivery pump 12, and the cold-end condensate of the condensate system 11 is delivered into the low-temperature heat exchanger 7 by the third delivery pump 15.
For example, in the non-energy consumption desulfurization waste water treatment system provided in one embodiment, as shown in fig. 1 and fig. 2, the desulfurization waste water feed pump 2 conveys the desulfurization waste water in the desulfurization waste water pool 1 to the high-temperature heat exchanger 3, and the desulfurization waste water is heated to 51 ℃ by the hot-end high-temperature water of the condensate system 11 and then conveyed to the negative pressure flash separator 4 for flash evaporation. According to the embodiment, the high-temperature heat exchanger 3 increases the temperature of the desulfurization wastewater to 51 ℃, so that the quality of the condensed water is greatly improved.
For example, in the desulfurization waste water treatment system without energy consumption provided by one embodiment, the high-temperature heat exchanger 3 and the low-temperature heat exchanger 7 are tube heat exchangers. According to the embodiment, the tubular heat exchanger is adopted, and the heat exchange efficiency is higher than that of a conventional plate heat exchanger. Compared with a plate heat exchanger, the tubular heat exchanger has a wide flow passage, high heat exchange efficiency and good corrosion resistance, and can effectively prevent scaling and dirt blockage.
For example, in the energy-consumption-free desulfurization wastewater treatment system provided by one embodiment, the negative pressure flash separator 4 flashes the desulfurization wastewater into saturated steam and solid miscellaneous salts, the saturated steam is dead steam, and the solid miscellaneous salts are collected by the solid collection bin 6.
Although embodiments of the present application have been disclosed for illustrative purposes, those skilled in the art will recognize that: various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (10)
1. A desulfurization wastewater treatment system without energy consumption is characterized by comprising a desulfurization wastewater pool, a desulfurization wastewater feeding pump, a high-temperature heat exchanger, a negative pressure flash separator, a low-temperature heat exchanger, a low-temperature heater and a condensate system which are connected through pipelines;
the desulfurization wastewater in the desulfurization wastewater pool is conveyed into the high-temperature heat exchanger by the desulfurization wastewater feeding pump, the hot-end high-temperature water of the condensed water system is conveyed into the high-temperature heat exchanger to be used as a heat exchange medium to heat the desulfurization wastewater, and then the desulfurization wastewater is conveyed to the negative-pressure flash separator to be subjected to flash separation, the flash-separated saturated steam enters the low-temperature heat exchanger, the condensed water subjected to heat exchange and temperature reduction in the high-temperature heat exchanger enters the low-temperature heat exchanger to be used as a heat exchange medium to absorb the heat of the saturated steam, the heat is heated, the condensed water enters the low-temperature heater to be heated and then returns to the hot end of the condensed water system, and meanwhile, the saturated steam in the low-temperature heat exchanger is rapidly condensed into qualified water to be discharged.
2. The energy-consumption-free desulfurization wastewater treatment system according to claim 1, wherein the desulfurization wastewater feed pump conveys desulfurization wastewater in the desulfurization wastewater tank into the high-temperature heat exchanger, the hot-end high-temperature water of the condensate system is conveyed into the high-temperature heat exchanger as a heat exchange medium to heat the desulfurization wastewater and then convey the heated desulfurization wastewater to the negative-pressure flash separator for flash separation, the flashed saturated steam enters the low-temperature heat exchanger, the cold-end low-temperature water of the condensate system is conveyed into the low-temperature heat exchanger as a heat exchange medium to absorb heat of the saturated steam for heat exchange and temperature rise, then enters the low-temperature heater for heating and then returns to the hot end of the condensate system, meanwhile, the saturated steam in the low-temperature heat exchanger is rapidly condensed into qualified water for discharge, and the condensate water after temperature reduction in the high-temperature heat exchanger enters the low-temperature heater for heating and then returns to the hot end of the condensate system.
3. The energy-consumption-free desulfurization wastewater treatment system according to claim 1 or 2, further comprising a crystallizer connected with the negative pressure flash separator and a solid collection bin connected with the crystallizer, wherein a concentrated solution formed by the desulfurization wastewater after flash evaporation by the negative pressure flash separator is subjected to solid-liquid separation by the crystallizer, and the solid is collected by the solid collection bin.
4. The energy-consumption-free desulfurization wastewater treatment system according to claim 3, wherein the negative pressure flash separator is in a vacuum state and has a back pressure of 13 kPa.
5. The system for treating desulfurization waste water without energy consumption as claimed in claim 3, wherein a concentrated solution circulating and conveying pump is provided on the pipeline connecting the negative pressure flash separator and the desulfurization waste water feeding pump, so as to circulate the separated liquid in the system and flash the separated liquid into steam.
6. The energy-consumption-free desulfurization wastewater treatment system according to claim 1, further comprising a condensate water pipeline, wherein the condensate water after heat exchange and temperature reduction in the high-temperature heat exchanger enters the low-temperature heat exchanger through the condensate water pipeline as a heat exchange medium to absorb heat of the saturated steam, and enters the low-temperature heater to be heated and then returns to the hot end of the condensate water system after heat exchange and temperature rise.
7. The desulfurization waste water treatment system without energy consumption of claim 1, wherein the condensed water after heat exchange and temperature rise in the low-temperature heat exchanger is delivered to the low-temperature heater through a first delivery pump.
8. The desulfurization waste water treatment system without energy consumption as claimed in claim 2, wherein the hot end high temperature water of the condensed water system is delivered into the high temperature heat exchanger by a second delivery pump, and the cold end condensed water of the condensed water system is delivered into the low temperature heat exchanger by a third delivery pump.
9. The energy-consumption-free desulfurization waste water treatment system according to claim 1 or 2, wherein the desulfurization waste water feed pump conveys desulfurization waste water in the desulfurization waste water tank into the high-temperature heat exchanger, heats the desulfurization waste water to 51 ℃ through hot-end high-temperature water of the condensate system, and conveys the heated desulfurization waste water to the negative-pressure flash separator for flash evaporation.
10. The energy-consumption-free desulfurization wastewater treatment system according to claim 3, wherein the negative pressure flash separator flashes the desulfurization wastewater into saturated steam and solid miscellaneous salts, the saturated steam is dead steam, and the solid miscellaneous salts are collected by the solid collection bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221687528.7U CN218202269U (en) | 2022-07-01 | 2022-07-01 | Desulfurization wastewater treatment system without energy consumption |
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