CN218931769U - Desulfurization wastewater integrated treatment system - Google Patents
Desulfurization wastewater integrated treatment system Download PDFInfo
- Publication number
- CN218931769U CN218931769U CN202222868767.9U CN202222868767U CN218931769U CN 218931769 U CN218931769 U CN 218931769U CN 202222868767 U CN202222868767 U CN 202222868767U CN 218931769 U CN218931769 U CN 218931769U
- Authority
- CN
- China
- Prior art keywords
- water
- pipeline
- desulfurization wastewater
- gas
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 117
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 114
- 230000023556 desulfurization Effects 0.000 title claims abstract description 114
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 142
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003546 flue gas Substances 0.000 claims abstract description 32
- 239000007789 gas Substances 0.000 claims abstract description 20
- 230000001502 supplementing effect Effects 0.000 claims abstract description 20
- 238000005243 fluidization Methods 0.000 claims abstract description 19
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims description 56
- 238000001035 drying Methods 0.000 claims description 34
- 238000000746 purification Methods 0.000 claims description 30
- 239000010410 layer Substances 0.000 claims description 23
- 239000000428 dust Substances 0.000 claims description 17
- 238000001223 reverse osmosis Methods 0.000 claims description 16
- 230000000630 rising effect Effects 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 10
- 238000005485 electric heating Methods 0.000 claims description 7
- 239000011229 interlayer Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 28
- 239000002918 waste heat Substances 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000007599 discharging Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000002910 solid waste Substances 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004094 preconcentration Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241001640558 Cotoneaster horizontalis Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
Images
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The utility model discloses an integrated treatment system for desulfurization wastewater, which comprises: the inlet and outlet of one side of the gas-gas heat exchanger are respectively connected with a high-temperature flue gas bypass output pipeline and a high-temperature flue gas bypass input pipeline, and the inlet and outlet of the other side of the gas-gas heat exchanger are respectively connected with an air input pipeline and a fluidization air pipe; the desulfurization wastewater integrated treatment device is connected with the fluidization air pipe, and the top end and the bottom end of the desulfurization wastewater integrated treatment device are respectively connected with a steam pipeline and a discharge pipe; the gas-water heat exchanger is positioned at one side of the desulfurization wastewater integrated treatment device, an inlet and an outlet at one side of the gas-water heat exchanger are respectively connected with a steam pipeline and a water collecting pipeline, the water collecting pipeline is connected with a water collecting tank, and an inlet and an outlet at the other side of the gas-water heat exchanger are respectively connected with a boiler water supplementing input pipeline and a boiler water supplementing output pipeline. The system can recycle the waste heat of the boiler flue and the water vapor obtained after the wastewater treatment, improves the water resource utilization rate of the whole system, and avoids energy waste.
Description
Technical Field
The utility model relates to the technical field of comprehensive wastewater treatment, in particular to an integrated desulfurization wastewater treatment system.
Background
With the high emphasis of the national protection of the atmospheric environment and the water environment, the emission index of sulfur dioxide in large industrial flue gas of coal-fired power plants and the like is more and more strict, the flue gas wet desulfurization technology is widely applied in the field of coal-fired industry, and desulfurization wastewater generated by the system has become a difficult problem of wastewater treatment due to higher salt content. In recent years, with the gradual increase of national requirements for industrial wastewater discharge, the zero discharge technology of desulfurization wastewater has been paid attention to the related technical fields, and in particular, the reliability of the zero discharge technology of desulfurization wastewater applied to coal-fired power plants has been paid more attention. In addition, the wet desulfurization wastewater of the coal-fired power plant has larger difference with wastewater generated by other systems, is the water body with the most complex water quality and the most serious pollution in the water system of the coal-fired power plant, and contains high-concentration suspended matters, high chloride, high salt content and high-concentration heavy metals, thereby having extremely strong environmental pollution, and realizing zero discharge of the desulfurization wastewater.
In order to solve the technical problems, many research institutions research and develop devices capable of realizing zero emission of desulfurization wastewater, but most desulfurization wastewater treatment devices have the problems of heat waste, insufficient water resource recovery, large complex occupied area of a system, low reliability and the like, and are difficult to widely apply. Patent CN 110723858A discloses a "desulfurization waste water zero release treatment system and treatment process", the system discards a "three-header" or a so-called "integrated" pretreatment system, only carries out simple physical precipitation on desulfurization waste water without adding any medicament, and carries out spray drying treatment on the precipitated desulfurization waste water by using high-temperature flue gas of an air preheater bypass, the process is simple, economical and simple, no new solid waste needing to be treated separately is produced, and the "zero release" is realized. However, the mode of collecting solid waste by using the flue gas dust removal device leads to the blockage of the device, greatly reduces the service life of a cloth bag of the flue gas dust removal device, and in addition, the system sprays untreated desulfurization waste liquid into a drying tank by using a spray head, so that the spray head is easy to block, and reduces the safety of the system; patent CN 213802993U discloses "an integrated desulfurization waste water concentrating and drying tower system", the device is provided with ring ascending chamber and preconcentration chamber, desulfurization waste water is concentrated in preconcentration chamber, use high temperature flue gas to evaporate the desulfurization waste water after concentrating in ring ascending chamber again, the solid waste material that separates gathers at the tank bottom, open the discharge valve and transport the waste material out, in order to realize desulfurization waste water's zero release, above-mentioned device reasonable in design, area is little, but untreated desulfurization waste liquid utilizes the shower nozzle to spout into the tank, easily cause the shower nozzle to block up, the security of system has been reduced, in addition the device does not retrieve waste heat and vapor, the energy waste has been caused.
Therefore, how to provide a desulfurization wastewater integrated treatment system which has reasonable design, simple system and small occupied area, can avoid blocking a spray head, improve the safety of the system, recover waste heat and water vapor, improve the water resource utilization rate of the whole system and avoid energy waste is a problem which needs to be solved by the technicians in the field.
Disclosure of Invention
In view of the above, the utility model provides the desulfurization wastewater integrated treatment system which has reasonable design, simple system and small occupied area, can avoid blocking a spray head, improves the safety of the system, can recycle waste heat and water vapor, improves the water resource utilization rate of the whole system, and avoids energy waste.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
an integrated desulfurization wastewater treatment system, comprising:
the inlet and outlet of one side of the gas-gas heat exchanger are respectively connected with a high-temperature flue gas bypass output pipeline and a high-temperature flue gas bypass input pipeline, and the inlet and outlet of the other side of the gas-gas heat exchanger are respectively connected with an air input pipeline and a fluidization air pipe;
the desulfurization waste water integrated treatment device is positioned at one side of the gas-gas heat exchanger, is connected with the fluidization air pipe and is used for softening, concentrating, purifying and drying desulfurization waste water, and the top end and the bottom end of the desulfurization waste water integrated treatment device are respectively connected with a steam pipeline and a discharge pipe;
the device comprises a desulfurization wastewater integrated treatment device, a steam pipeline, a water collecting tank and a boiler water supplementing input pipeline, wherein the steam pipeline and the water collecting pipeline are respectively connected to an inlet and an outlet of one side of the gas-water heat exchanger, the water collecting tank is connected to the water collecting pipeline, and the boiler water supplementing input pipeline and the boiler water supplementing output pipeline are respectively connected to an inlet and an outlet of the other side of the gas-water heat exchanger.
Compared with the prior art, the utility model discloses a desulfurization wastewater integrated treatment system, wherein when the desulfurization wastewater integrated treatment system works, high-temperature flue gas at 350-400 ℃ in a boiler flue is conveyed into a gas-gas heat exchanger through a high-temperature flue gas bypass output pipeline to exchange heat with air at 5-12 ℃ conveyed into the gas-gas heat exchanger through an air input pipeline, low-temperature air is heated to 60-70 ℃ and then is conveyed into a desulfurization wastewater integrated treatment device through a fluidization air pipe, and cooled high-temperature flue gas is conveyed back into the boiler flue through the high-temperature flue gas bypass input pipeline; adding desulfurization wastewater and a softening and neutralizing agent into a desulfurization wastewater integrated treatment device for softening and concentrating, mixing concentrated waste liquid with hot air conveyed by a fluidization air pipe, purifying and drying the wastewater, discharging the dried waste material through a discharge pipe, and conveying steam evaporated from the waste liquid into a gas-water heat exchanger through a steam pipeline; at this time, the boiler water is conveyed to the gas-water heat exchanger through the boiler water supplementing input pipeline to exchange heat with the water vapor, the boiler water is heated to 22-25 ℃ from 10-17 ℃ and then enters the boiler through the boiler water supplementing output pipeline, and the cooled water vapor is changed into condensed water and conveyed to the water collecting tank through the water collecting pipeline. Therefore, the desulfurization wastewater integrated treatment system can recover the waste heat of the boiler flue and the water vapor obtained after wastewater treatment, improves the water resource utilization rate of the whole system, and avoids energy waste.
Further, the desulfurization wastewater integrated treatment device includes:
the purifying and drying bin is characterized in that the inner space of the purifying and drying bin is a spray chamber, the fluidization air pipe is communicated with the spray chamber, a spray layer is arranged at the top of the spray chamber, a plurality of nozzles with the spraying directions facing the spray chamber are arranged on the bottom end face of the spray layer, the bottom end of the purifying and drying bin is connected with a discharging pipe, and the top end of the purifying and drying bin is connected with a steam pipeline;
the dosing tank is arranged at the top end of the spraying layer, and the top end of the dosing tank is provided with a desulfurization wastewater inlet and a dosing port;
reverse osmosis unit, reverse osmosis unit sets up in the dosing pond and be located one side of dosing mouth, reverse osmosis unit's water purification mouth is connected with the water purification pipeline, the water purification pipeline is connected with the water purification case, reverse osmosis unit's concentrated waste water exit linkage has concentrated waste water pipeline, concentrated waste water pipeline with spray the entry linkage of layer.
The technical scheme has the beneficial effects that the desulfurization wastewater enters the dosing tank through the desulfurization wastewater inlet and is filled with softening and neutralizing agents in the dosing tank through the dosing port at the top end of the dosing tank, the desulfurization wastewater in the dosing tank is subjected to softening and comprehensive treatment, the treated wastewater enters the reverse osmosis device to be concentrated, and the separated clean water is conveyed into the clean water tank through the clean water pipeline to be recycled; the concentrated desulfurization waste water is conveyed into a spray layer through a concentrated waste water pipeline, the spray nozzle sprays the desulfurization waste water in the spray layer into a spray chamber, the spray nozzle is mixed with hot air conveyed into the spray chamber through a fluidization air pipe, purification and drying are carried out, the dried waste is discharged through a discharge pipe, and steam evaporated from the waste liquid is conveyed into a gas-water heat exchanger through a steam pipeline; at this time, the boiler water is conveyed to the gas-water heat exchanger through the boiler water supplementing input pipeline to exchange heat with the water vapor, the boiler water is heated to 22-25 ℃ from 10-17 ℃ and then enters the boiler through the boiler water supplementing output pipeline, and the cooled water vapor is changed into condensed water and conveyed to the water collecting tank through the water collecting pipeline. Therefore, the system reduces the occupied area of the desulfurization wastewater treatment device and avoids the scaling and blockage in the pipeline caused by long-distance transportation of the desulfurization wastewater by integrating the dosing tank, the reverse osmosis device, the purification drying device and other devices into one device; meanwhile, the desulfurization wastewater is subjected to dosing treatment in a dosing tank, metal root ions in the wastewater are removed, a spray head is prevented from being blocked, the safety of a system is improved, the treated wastewater is subjected to concentration, purification and drying treatment to form solid waste, and then the solid waste is subjected to innocent treatment after being transported, so that zero emission of the desulfurization wastewater is realized.
Further, the bottom of the spray chamber is provided with an ash bucket, an electric heating device is arranged in an interlayer of the ash bucket, and the bottom end of the ash bucket is connected with the discharging pipe.
The technical scheme has the beneficial effects that the spray nozzle sprays the desulfurization wastewater in the spray layer into the spray chamber, the desulfurization wastewater is mixed with hot air conveyed into the spray chamber through the fluidization air pipe, the desulfurization wastewater is purified and dried, after partial moisture is removed, the desulfurization wastewater falls into the ash bucket, at the moment, the electric heating device arranged on the ash bucket wall is started to evaporate the waste liquid in the ash bucket, the evaporated waste material is discharged through the discharge pipeline, and water vapor generated in the purification and evaporation process enters the gas-water heat exchanger through the steam pipeline and is conveyed to the gas-water heat exchanger. Therefore, the electric heating device can quickly evaporate the water in the waste liquid, so that the waste liquid treatment efficiency is quickened.
Further, still include the storehouse top dust remover of setting in purification stoving storehouse top one side, storehouse top dust remover is located add one side of medicine pond, and be close to the steam pipe sets up.
The technical scheme has the beneficial effects that the water vapor generated in the purification and evaporation process is conveyed to the gas-water heat exchanger through the steam pipeline after impurities in the water vapor are removed through the bin top dust remover, so that the cleanliness of water vapor recovery can be improved.
Further, still including setting up the medicine pond with vertical baffle between the storehouse top dust remover, the lower extreme of vertical baffle with the bottom interval arrangement of ash bucket, and the space of two is steam passage, vertical baffle one side with space formation between purification stoving storehouse one side storehouse wall spray room, the vertical baffle opposite side with space formation steam rising room between the purification stoving storehouse opposite side storehouse wall, the storehouse top dust remover is located steam rising room top, steam passage sets up steam rising room top.
The technical scheme has the beneficial effects that the vertical partition plate is arranged between the spray chamber and the steam rising chamber, so that tiny liquid drops in the spray chamber are prevented from entering the steam rising chamber, the indoor steam is polluted, and the dryness of the water steam is further ensured.
Further, the wall of the purification drying bin is wrapped with an insulating layer.
The technical scheme has the beneficial effects of reducing heat loss to the outside in the desulfurization wastewater treatment device and avoiding energy waste.
Further, the discharging pipes are arranged at intervals.
The beneficial effect that adopts above-mentioned technical scheme to produce is, improves blowing efficiency.
Further, a discharging valve is arranged on the discharging pipe.
The beneficial effect that adopts above-mentioned technical scheme to produce is, opens the blowing valve and can blow.
Further, a first gate valve is arranged on the high-temperature flue gas bypass output pipeline, and a second gate valve is arranged on the boiler water supplementing input pipeline.
The beneficial effects that adopt above-mentioned technical scheme to produce are, can control the break-make of boiler flue gas and boiler moisturizing respectively through first gate valve and second gate valve.
Further, the air input pipeline is connected with an axial flow fan.
The technical scheme has the beneficial effects that the axial flow fan can quickly pump outside air into the air input pipeline, so that the air conveying efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a desulfurization wastewater integrated treatment system according to the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, an embodiment of the utility model discloses an integrated desulfurization wastewater treatment system, which comprises:
the device comprises a gas-gas heat exchanger 1, wherein an inlet and an outlet on one side of the gas-gas heat exchanger 1 are respectively connected with a high-temperature flue gas bypass output pipeline 2 and a high-temperature flue gas bypass input pipeline 3, and an inlet and an outlet on the other side of the gas-gas heat exchanger 1 are respectively connected with an air input pipeline 4 and a fluidization air pipe 5;
the desulfurization waste water integrated treatment device 6 is positioned on one side of the gas-gas heat exchanger 1, the desulfurization waste water integrated treatment device 6 is connected with the fluidization air pipe 5 and is used for softening, concentrating, purifying and drying desulfurization waste water, and the top end and the bottom end of the desulfurization waste water integrated treatment device 6 are respectively connected with the steam pipeline 7 and the discharge pipe 8;
the device comprises a gas-water heat exchanger 9, wherein the gas-water heat exchanger 9 is positioned on one side of the desulfurization wastewater integrated treatment device 6, a steam pipeline 7 and a water collecting pipeline 10 are respectively connected to an inlet and an outlet on one side of the gas-water heat exchanger 9, a water collecting tank 11 is connected to the water collecting pipeline 10, and a boiler water supplementing input pipeline 12 and a boiler water supplementing output pipeline 13 are respectively connected to an inlet and an outlet on the other side of the gas-water heat exchanger 9.
Specifically, the desulfurization wastewater integrated treatment device 6 includes:
the purifying and drying bin 61, the inner space of the purifying and drying bin 61 is a spray chamber 611, the fluidization air pipe 5 is communicated with the spray chamber 611, a spray layer 612 is arranged at the top of the spray chamber 611, a plurality of nozzles 613 with the spraying directions facing the spray chamber 611 are arranged on the bottom end surface of the spray layer 612, the bottom end of the purifying and drying bin 61 is connected with a discharge pipe 8, and the top end of the purifying and drying bin 61 is connected with a steam pipeline 7;
the dosing tank 62, the dosing tank 62 is arranged at the top end of the spraying layer 612, and the top end of the dosing tank 62 is provided with a desulfurization wastewater inlet 621 and a dosing port 622;
the reverse osmosis device 63, the reverse osmosis device 63 sets up in dosing pond 62 and is located the one side of dosing mouth 622, and the water purification mouth of reverse osmosis device 63 is connected with water purification pipeline 631, and water purification pipeline 631 is connected with the clean water tank, and the concentrated waste water outlet of reverse osmosis device 63 is connected with concentrated waste water pipeline 632, and concentrated waste water pipeline 632 is connected with the entry of spray layer 612.
The bottom of the spray chamber 611 is provided with an ash bucket 6111, an electric heating device 64 is arranged in an interlayer of the ash bucket 6111, and the bottom end of the ash bucket 6111 is connected with a discharge pipe 8.
The desulfurization wastewater integrated treatment system further comprises a bin top dust remover 65 arranged on one side of the top end of the purification drying bin 61, wherein the bin top dust remover 65 is positioned on one side of the dosing tank 62 and is close to the steam pipeline 7.
The desulfurization wastewater integrated treatment system further comprises a vertical partition plate 66 arranged between the dosing tank 62 and the bin top dust remover 65, wherein the lower end of the vertical partition plate 66 is arranged at intervals with the bottom end of the ash bucket 6111, a gap between the vertical partition plate 66 and the bottom end of the ash bucket 6111 is a steam channel 601, a spray chamber 611 is formed by a space between one side of the vertical partition plate 66 and a bin wall on one side of the purification drying bin 61, a steam rising chamber 614 is formed by a space between the other side of the vertical partition plate 66 and a bin wall on the other side of the purification drying bin 61, the bin top dust remover 65 is positioned at the top of the steam rising chamber 614, and a steam pipeline 7 is arranged at the top end of the steam rising chamber 614.
The wall of the purifying and drying bin 61 is wrapped with a heat insulation layer 67.
The discharge pipe 8 is a plurality of the discharge pipes which are arranged at intervals.
A discharge valve 68 is provided on the discharge pipe 8.
The high-temperature flue gas bypass output pipeline 2 is provided with a first gate valve 14, and the boiler water supplementing input pipeline 12 is provided with a second gate valve 15.
The air input duct 4 is connected with an axial flow fan 16.
The working principle of the system is as follows:
the first gate valve 14 is opened, high-temperature flue gas at 350-400 ℃ in the boiler flue is conveyed into the gas-gas heat exchanger 1 through the high-temperature flue gas bypass output pipeline 2 to exchange heat with air at 5-12 ℃ which is pumped by the axial flow fan 16 and conveyed into the gas-gas heat exchanger 1 through the air input pipeline 4, low-temperature air is heated to 60-70 ℃ and then conveyed into the spray chamber 611 through the fluidization air pipe 5, and cooled high-temperature flue gas is conveyed back into the boiler flue through the high-temperature flue gas bypass input pipeline 3;
the desulfurization wastewater enters the dosing tank 62 through a desulfurization wastewater inlet 621, a softening neutralization reagent is filled into the dosing tank 62 through a dosing port 622 at the top end of the dosing tank 62, the desulfurization wastewater in the dosing tank is subjected to softening comprehensive treatment, the treated wastewater enters a reverse osmosis device 63 for concentration treatment, and separated clean water is conveyed into a clean water tank through a clean water pipeline 631 for recycling;
delivering the concentrated desulfurization wastewater to a spray layer 612 through a concentrated wastewater pipeline 632, spraying the desulfurization wastewater in the spray layer 612 into a spray chamber 611 through a nozzle 613, mixing the desulfurization wastewater with hot air delivered to the spray chamber 611 through a fluidization air pipe 5, purifying and drying, removing part of water, dropping the desulfurization wastewater into an ash bucket 6111 at the bottom of the device, starting an electric heating device 64 arranged on the wall of the ash bucket at the moment, evaporating the waste liquid in the ash bucket 6111 to dryness, and opening a discharge valve 68 to discharge the evaporated waste through a discharge pipeline 68;
the water vapor generated in the purification and evaporation process enters a steam rising chamber 614, impurities in the water vapor are removed by a bin top dust remover 65 arranged at the top of the steam rising chamber 614, and the water vapor is conveyed to a gas-water heat exchanger 9 through a steam pipeline 7; at this time, the second gate valve 15 is opened, the boiler water is conveyed to the gas-water heat exchanger 9 through the boiler water supplementing input pipeline 12 to exchange heat with the water vapor, the boiler water is heated to 22-25 ℃ from 10-17 ℃ and then enters the boiler through the boiler water supplementing output pipeline 13, and the cooled water vapor is changed into condensed water and conveyed to the water collecting tank 11 through the water collecting pipeline 10.
In this embodiment, a heating company in the north is taken as an example, the company has 6 70MW coal-fired hot water boilers, in order to meet the requirement of environmental protection indexes, a desulfurization water bed device is provided for each boiler to remove sulfur dioxide in flue gas, the devices can generate nearly ten thousand desulfurization waste water in the whole operation process of the heating period, in order to avoid the generated desulfurization waste water polluting the environment, the company sprays the desulfurization waste water into a high-temperature flue to evaporate the desulfurization waste water after softening treatment, the method realizes zero emission of the desulfurization waste water, but the flue is found to be corroded by the desulfurization waste water and a thicker scale layer is formed on the surface of the flue during later flue maintenance, and the operation safety of the boiler is seriously influenced. Therefore, the original desulfurization wastewater treatment mode is canceled by the company, and the desulfurization wastewater integrated treatment system is additionally arranged for treating desulfurization wastewater, and the working flow is as follows:
1. the desulfurization waste produced by the company is filtered out large-particle solid matters by a cyclone separator and a plate-and-frame filter press, and then the desulfurization waste water is separated. The desulfurization wastewater enters a dosing tank through a desulfurization wastewater inlet, meanwhile, alkali liquor and organic sulfide agents are added into the dosing tank through a dosing port at the top end of the dosing tank, the desulfurization wastewater in the dosing tank is subjected to softening comprehensive treatment, the treated wastewater enters a reverse osmosis device for concentration treatment, and separated clean water is conveyed into a clean water tank for recycling through a clean water pipeline; and conveying the concentrated desulfurization wastewater to a spraying layer through a concentrated wastewater pipeline, and spraying the desulfurization wastewater in the spraying layer into a spraying chamber through a nozzle.
2. Simultaneously, a first gate valve is opened to convey high-temperature flue gas at 390 ℃ in a boiler flue to the gas-gas heat exchanger through a high-temperature flue gas bypass output pipeline to exchange heat with air at 10 ℃ which is pumped by an axial flow fan and conveyed to the gas-gas heat exchanger through an air input pipeline, low-temperature air is heated to 68 ℃ and then conveyed to a spray chamber through a fluidization air pipe, and cooled high-temperature flue gas is conveyed back to the boiler flue through the high-temperature flue gas bypass input pipeline;
3. the concentrated liquid drops of the desulfurization waste water sprayed into the spray chamber are mixed with hot air conveyed into the spray chamber by a fluidization air pipe, purified and dried, and after partial moisture is removed, the concentrated liquid drops fall into an ash bucket at the bottom of the device, at the moment, an electric heating device arranged on the ash bucket wall is started to evaporate the waste liquid in the ash bucket to solid matters with the water content lower than 10%, and then a discharge valve is opened to discharge the evaporated waste materials through a discharge pipeline.
4. The water vapor generated in the purification and evaporation process enters a vapor ascending chamber, impurities in the water vapor are removed through a cabin top dust remover arranged at the top of the vapor ascending chamber, and the water vapor is conveyed into a gas-water heat exchanger through a vapor pipeline; at this time, the second gate valve is opened, the boiler water is conveyed to the air-water heat exchanger to exchange heat with the water vapor through the boiler water supplementing input pipeline, the boiler water is heated to 24 ℃ from 12 ℃ and then enters the boiler through the boiler water supplementing output pipeline, and the cooled water vapor is changed into condensed water and conveyed to the water collecting tank through the water collecting pipeline.
By installing the system, the company realizes zero emission of desulfurization wastewater, and avoids pollution to the environment caused by random emission of desulfurization wastewater; meanwhile, the system is reasonable in design, the failure rate of the whole system is greatly reduced, and in addition, as the system is provided with the steam and waste heat recovery system, the recovery rate of water resources is greatly improved, and the energy waste is avoided.
Therefore, the utility model has the technical effects that:
1) The system integrates the softening device, the concentrating device and the purifying and drying device for treating the wastewater into one tank body, has reasonable design, simple system and small occupied area;
2) The system softens, concentrates, purifies and dries the desulfurization waste water to make the desulfurization waste water become solid particles with the water content not exceeding 10%, realizes zero emission of the desulfurization waste water, and avoids pollution of the desulfurization waste water to the environment;
3) The system utilizes the gas-gas heat exchanger to exchange heat between the waste heat of the boiler flue gas and the outside air, so that the air after heat exchange is used as a heat source required by purification and drying in the spray chamber, and simultaneously utilizes the gas-water heat exchanger to exchange heat between the vapor evaporated from the waste liquid and the water supplement of the boiler, thereby realizing the recovery of the vapor generated in the purification and drying process of the waste liquid, improving the water resource utilization rate of the whole system, fully utilizing the heat of the waste heat of the boiler and the water supplement of the water heating boiler, and achieving the effects of saving energy and avoiding energy waste.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An integrated desulfurization wastewater treatment system, comprising:
the device comprises a gas-gas heat exchanger (1), wherein an inlet and an outlet on one side of the gas-gas heat exchanger (1) are respectively connected with a high-temperature flue gas bypass output pipeline (2) and a high-temperature flue gas bypass input pipeline (3), and an inlet and an outlet on the other side of the gas-gas heat exchanger (1) are respectively connected with an air input pipeline (4) and a fluidization air pipe (5);
the desulfurization wastewater integrated treatment device (6), the desulfurization wastewater integrated treatment device (6) is positioned at one side of the gas-gas heat exchanger (1), the desulfurization wastewater integrated treatment device (6) is connected with the fluidization air pipe (5) and is used for softening, concentrating, purifying and drying desulfurization wastewater, and the top end and the bottom end of the desulfurization wastewater integrated treatment device (6) are respectively connected with a steam pipeline (7) and a discharge pipe (8);
the desulfurization wastewater treatment device comprises a gas-water heat exchanger (9), wherein the gas-water heat exchanger (9) is positioned on one side of the desulfurization wastewater integrated treatment device (6), an inlet and an outlet on one side of the gas-water heat exchanger (9) are respectively connected with a steam pipeline (7) and a water collecting pipeline (10), the water collecting pipeline (10) is connected with a water collecting tank (11), and an inlet and an outlet on the other side of the gas-water heat exchanger (9) are respectively connected with a boiler water supplementing input pipeline (12) and a boiler water supplementing output pipeline (13).
2. The desulfurization wastewater integrated treatment system according to claim 1, wherein the desulfurization wastewater integrated treatment device (6) comprises:
the purifying and drying bin (61), the inner space of the purifying and drying bin (61) is a spray chamber (611), the fluidization air pipe (5) is communicated with the spray chamber (611), a spray layer (612) is arranged at the top of the spray chamber (611), a plurality of nozzles (613) with the spraying directions facing the spray chamber (611) are arranged on the bottom end face of the spray layer (612), the bottom end of the purifying and drying bin (61) is connected with a discharge pipe (8), and the top end of the purifying and drying bin (61) is connected with a steam pipeline (7);
the dosing tank (62), the dosing tank (62) is arranged at the top end of the spraying layer (612), and the top end of the dosing tank (62) is provided with a desulfurization wastewater inlet (621) and a dosing port (622);
reverse osmosis unit (63), reverse osmosis unit (63) set up in dosing tank (62) and be located one side of dosing mouth (622), the water purification mouth of reverse osmosis unit (63) is connected with water purification pipeline (631), water purification pipeline (631) are connected with the water purification case, the concentrated waste water outlet connection of reverse osmosis unit (63) has concentrated waste water pipeline (632), concentrated waste water pipeline (632) with the entry linkage of spray layer (612).
3. The desulfurization wastewater integrated treatment system according to claim 2, wherein an ash bucket (6111) is arranged at the bottom of the spray chamber (611), an electric heating device (64) is arranged in an interlayer of the ash bucket (6111), and the bottom end of the ash bucket (6111) is connected with the discharge pipe (8).
4. A desulfurization wastewater integrated treatment system according to claim 3, further comprising a top dust remover (65) provided on a top side of the purifying and drying chamber (61), the top dust remover (65) being provided on a side of the dosing tank (62) and being provided close to the steam pipe (7).
5. The desulfurization wastewater integrated treatment system according to claim 4, further comprising a vertical partition plate (66) arranged between the dosing tank (62) and the top dust collector (65), wherein the lower end of the vertical partition plate (66) and the bottom end of the ash bucket (6111) are arranged at intervals, a gap between the vertical partition plate (66) and the top wall of one side of the purification drying bin (61) forms a spray chamber (611), a space between the other side of the vertical partition plate (66) and the top wall of the other side of the purification drying bin (61) forms a steam rising chamber (614), the top dust collector (65) is positioned at the top of the steam rising chamber (614), and the steam pipeline (7) is arranged at the top end of the steam rising chamber (614).
6. The integrated desulfurization wastewater treatment system according to any one of claims 2-5, wherein the wall of the purification and drying bin (61) is covered with an insulating layer (67).
7. An integrated desulfurization wastewater treatment system according to any one of claims 1-5, characterized in that said discharge pipe (8) is a plurality of spaced-apart discharge pipes.
8. An integrated desulfurization waste water treatment system according to any one of claims 1-5, wherein the discharge pipe (8) is provided with a discharge valve (68).
9. The desulfurization wastewater integrated treatment system according to any one of claims 1-5, wherein a first gate valve (14) is arranged on the high-temperature flue gas bypass output pipeline (2), and a second gate valve (15) is arranged on the boiler water supplementing input pipeline (12).
10. The desulfurization wastewater integrated treatment system according to any one of claims 1-5, wherein the air input pipe (4) is connected with an axial flow fan (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222868767.9U CN218931769U (en) | 2022-10-28 | 2022-10-28 | Desulfurization wastewater integrated treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222868767.9U CN218931769U (en) | 2022-10-28 | 2022-10-28 | Desulfurization wastewater integrated treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218931769U true CN218931769U (en) | 2023-04-28 |
Family
ID=86064080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222868767.9U Active CN218931769U (en) | 2022-10-28 | 2022-10-28 | Desulfurization wastewater integrated treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218931769U (en) |
-
2022
- 2022-10-28 CN CN202222868767.9U patent/CN218931769U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103185346B (en) | Waste incineration flue gas combined purification system and its technology | |
| CN106630358A (en) | Zero-release coupling humidifying dust-removing synergizing system and method for desulfurization wastewater | |
| CN107129094A (en) | The Zero discharging system of desulfurization wastewater is evaporated based on multi-heat source | |
| CN108328683A (en) | Waste water of heat-engine plant condensing crystallizing Zero discharging system | |
| CN107954560A (en) | The technique that vapor recompression is concentrated by evaporation joint flue spray technique processing waste water | |
| CN112607945A (en) | Desulfurization wastewater zero-discharge system and method based on high-temperature and low-temperature flue gas coupling treatment | |
| CN206580583U (en) | FGD wastewater zero discharge systems | |
| CN110182874A (en) | A kind of super low energy consumption flash concentration desulfurization wastewater and industrial brine waste zero emission system | |
| CN105668669A (en) | Desulfurization waste water treatment system and process for power plant | |
| CN115893559A (en) | A desulfurization wastewater zero discharge system and desulfurization wastewater zero discharge process | |
| CN112875968A (en) | Desulfurization wastewater zero discharge system and method thereof | |
| CN212924708U (en) | Concentration and reduction system for desulfurization wastewater treatment of coal-fired power plant | |
| CN111892218B (en) | High-efficient low-cost desulfurization waste water treatment's of coal fired power plant zero discharge system | |
| CN206486391U (en) | A kind of desulfurization wastewater zero-emission couples damping Improvement of dust removal system | |
| CN207797091U (en) | A kind of device for realizing desulfurization wastewater zero-emission using full flue gas | |
| CN218931769U (en) | Desulfurization wastewater integrated treatment system | |
| CN205156423U (en) | Exhaust purification and waste heat recovery use multipurposely system | |
| CN113087051A (en) | Take boiler flue gas waste heat utilization's desulfurization effluent treatment plant | |
| CN112875785A (en) | Deep treatment system and method for wet desulphurization wastewater of coal-fired boiler | |
| CN112607944A (en) | Coal-fired power plant desulfurization wastewater treatment system and method based on flue gas cooperative treatment | |
| CN207933199U (en) | - kind of cascade utilization power-plant flue gas waste heat realizes the device of desulfurization wastewater zero-emission | |
| CN207918474U (en) | A power plant wastewater treatment device | |
| CN215712379U (en) | Zero discharge system of desulfurization waste water | |
| CN214360803U (en) | System for utilize multistage evaporation desulfurization waste water of flue gas waste heat | |
| CN215403191U (en) | Take boiler flue gas waste heat utilization's desulfurization effluent treatment plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |