CN111821802A - Wet desulphurization white plume and wastewater reduction cooperative treatment system - Google Patents
Wet desulphurization white plume and wastewater reduction cooperative treatment system Download PDFInfo
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- CN111821802A CN111821802A CN201910325850.1A CN201910325850A CN111821802A CN 111821802 A CN111821802 A CN 111821802A CN 201910325850 A CN201910325850 A CN 201910325850A CN 111821802 A CN111821802 A CN 111821802A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 41
- 230000009467 reduction Effects 0.000 title abstract description 21
- 239000003546 flue gas Substances 0.000 claims abstract description 53
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000012528 membrane Substances 0.000 claims abstract description 35
- 238000003303 reheating Methods 0.000 claims abstract description 13
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 12
- 230000023556 desulfurization Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims abstract description 3
- 230000003204 osmotic effect Effects 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 26
- 239000007921 spray Substances 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000012510 hollow fiber Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 64
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 230000002087 whitening effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 10
- 238000009833 condensation Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- 239000002918 waste heat Substances 0.000 description 7
- 238000002207 thermal evaporation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
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Abstract
The utility model provides a white plume of wet flue gas desulfurization and waste water minimizing cooperative management system, includes that the side is equipped with the flue gas entry and carries out desulfurization treatment's desulfurizing tower to the flue gas, and the lower part sets up the steam chamber, and the middle part sets up the osmotic membrane, and upper portion sets up the flue gas room and the flue gas vacuum membrane process water intake device that is connected with desulfurizing tower top exhanst gas outlet, and the flue gas reheating device that is connected with the flue gas room export of flue gas vacuum membrane process water intake device, the steam condensing system that links to each other with the steam chamber of flue gas. The white smoke plume and wastewater reduction cooperative treatment system for wet desulphurization eliminates white smoke, realizes wastewater reduction treatment, realizes zero discharge of wastewater, and is energy-saving and environment-friendly. Can be widely applied to a flue gas whitening and desulfurization wastewater treatment system.
Description
Technical Field
The invention relates to a white smoke plume and wastewater reduction cooperative treatment system for wet desulphurization, which can be widely applied to a flue gas whitening and desulphurization wastewater treatment system.
Background
The saturated wet flue gas with the low temperature of 45-55 ℃ directly enters the atmospheric environment through the chimney, and because the ambient temperature is lower than the flue gas temperature, the moisture in the saturated wet flue gas can be condensed into tiny liquid drops, thereby generating white smoke plume. The fog-like water vapor can generate slight color change due to sky illumination, observation angle, pollutant content and the like, and can also form grey-white or blue colored smoke plume on sight.
Foreign coal-fired industrial boilers are few, the influence of smoke emission on the environment is small, and the treatment of the wet desulphurization white smoke plume is not carried out in a large range due to loose policy requirements.
At present, the technology for eliminating 'white smoke' at home and abroad mainly comprises a smoke direct heating technology, water vapor in smoke is not condensed, water cannot be recovered, pollutants cannot be removed, and when the environmental temperature is lower, the temperature of the smoke needs to be raised to higher temperature, such as above 90 ℃, the effect of reducing visual pollution can be achieved, the effects of water-free recovery and pollution removal are achieved, high-grade energy needs to be consumed, and the environmental protection is poor. Therefore, the investment is large, the energy consumption is high, the white smoke plume treatment effect which can be achieved is very limited, and the popularization is limited.
For many years, the phenomenon of 'white smoke' of the chimney is not effectively treated because the phenomenon that no mature technology and successful engineering project precedent are available for reference at home and abroad.
In conclusion, under the requirement of the current environmental protection policy, the treatment of the white smoke plume of the wet desulphurization is urgent, and the zero emission treatment of the desulphurization wastewater is imperative. The existing technology has various defects, white smoke plume treatment and desulfurization wastewater treatment are carried out independently, and no technology is available for synchronously treating two pollutants. And the cooperative management can comprehensively consider two problems, thereby effectively simplifying the system and saving the investment. Therefore, the development of a wet desulphurization white plume and wastewater reduction cooperative treatment system is beneficial to the realization of integrated treatment of the plume and the desulphurization wastewater in the wet desulphurization tower with the least modification amount, overcomes various defects in other technologies, and realizes the 'environmental protection' modification with low investment and low energy consumption.
Disclosure of Invention
The invention aims to provide the white smoke abatement and waste water abatement cooperative treatment system which can eliminate white smoke, realize waste water abatement treatment, realize zero waste water discharge, save energy and protect environment.
In order to achieve the aim, the white smoke plume and wastewater reduction cooperative treatment system for wet desulphurization comprises a desulphurization tower, a steam chamber, a permeable membrane, a smoke vacuum membrane water intake device, a smoke reheating device and a steam condensing system, wherein the desulphurization tower is provided with a smoke inlet on the side surface and carries out desulphurization treatment on smoke, the lower part is provided with the steam chamber, the middle part is provided with the permeable membrane, the upper part is provided with the smoke chamber and is connected with a smoke outlet at the top of the desulphurization tower, the smoke reheating device is connected with the smoke chamber of the smoke vacuum membrane water intake device, and the steam condensing system is connected.
The invention relates to a white plume of wet desulphurization and wastewater reduction cooperative treatment system, which comprises a condensing tower connected with a steam chamber of a flue gas vacuum membrane method water taking device, a demister positioned in the condensing tower and arranged at the upper part of the condensing tower, a vacuum pump connected with the side surface of the upper part of the condensing tower through a pipeline, a spray device positioned at the lower part of the demister and arranged on the condensing tower, a cooling tower connected with the spray device through a connecting pipeline, a cooling tower water delivery pump arranged on the connecting pipeline between the spray device and the cooling tower, and a cooling tower water return pump arranged on the connecting pipeline between the bottom of the condensing tower and the bottom of the cooling tower.
According to the white smoke plume and wastewater reduction cooperative treatment system for wet desulphurization, a water taking device for the smoke by using a vacuum membrane method is provided, an inlet of a smoke chamber is connected with a desulphurization tower, and an outlet of the smoke chamber is connected with a smoke reheating device; the permeable membrane is a hollow fiber membrane or a hydrophilic porous ceramic membrane; the steam chamber is in vacuum state, and the inside is filled with water vapor permeated by the permeable membrane.
The invention relates to a white smoke plume and wastewater reduction cooperative treatment system for wet desulphurization, wherein a smoke reheating device is a steam reheater.
The invention relates to a white smoke plume and wastewater reduction cooperative treatment system for wet desulphurization, which has the working principle that:
(1) saturated wet flue gas at the outlet of the desulfurizing tower enters a flue gas chamber, water vapor in the flue gas enters a steam chamber through a permeable membrane under the action of osmotic pressure, and other components such as CO in the flue gas2、N2Cannot pass through the permeable membrane. The temperature of the smoke at the outlet of the smoke chamber is unchanged, the relative humidity is reduced, and then the smoke enters the smoke reheating device to absorb the heat of the smoke reheating device, the temperature is increased, the degree of superheat of water vapor is increased, and white smoke can be eliminated after the smoke is discharged to the atmosphere, namely, white smoke plume is eliminated through wet desulphurization. Moreover, the content of water vapor in the flue gas at the outlet of the desulfurizing tower is reduced after water is condensed and taken, and the effect of eliminating white smoke can be achieved only by raising the temperature a little.
(2) The steam with higher purity is obtained in the steam chamber and enters the lower part of the condensation tower through a pipeline. Cooling water from the cooling tower is atomized by the spraying device and then carries out countercurrent heat exchange with steam from bottom to top, the temperature of the steam is reduced and condensed into water, and the water and the cooling water with the increased temperature fall into the bottom of the condensing tower. The steam is condensed into water, the volume is reduced, and vacuum is generated in the condensing tower. The tiny water drops are caught by a demister on the upper part of the condensing tower and fall to the bottom of the condensing tower. Non-condensable gas in the condensing tower is pumped out by a vacuum pump. The cooling water with the temperature increased at the bottom of the condensing tower is cooled after reaching the cooling tower and then returns to the spraying device for repeated use, thereby realizing the reduction treatment of the waste water and achieving the purpose of zero discharge of the waste water. And the flue gas cooling mode selects a slurry cooling mode with higher heat exchange coefficient, and the slurry cooling adopts a vacuum condensation cooling technology capable of synchronously solving the problem of water balance and a desulfurization waste water vacuum condensation technology for recycling slurry waste heat.
The white smoke plume of wet desulphurization and the wastewater reduction cooperative treatment system synchronously extract water vapor and heat by utilizing vacuum condensation, realize the recycling of ultralow-grade waste heat of the desulfurized slurry, and change the current situations of high energy consumption and high cost of zero discharge of the desulfurized wastewater. The flue gas cooling part adopts the flash distillation desulfurization waste water mode to cool off the thick liquid, and the thick liquid after the cooling sprays the flue gas, makes the flue gas temperature further reduce, and the supersaturated vapor in the flue gas condenses on the fine particle surface to along with collision coalescence between granule, liquid drop size grow, whereabouts, accomplish the phase transition coacervation process of vapor, fine dust, reduce dust content in the clean flue gas. The waste heat of the flue gas is recovered to heat the clean flue gas to a proper temperature, so that the white smoke plume is eliminated, the waste heat of the flue gas is utilized, and the energy is saved. Meanwhile, water saving and recycling are realized.
The wet desulphurization white smoke plume and wastewater reduction cooperative treatment system provided by the invention aims at the defects of high pollution discharge cost and high energy consumption caused by independent work of the traditional desulphurization wastewater discharge system and the smoke plume treatment system, adopts a key technology of 'wet desulphurization white smoke plume and desulphurization wastewater reduction cooperative treatment', fully utilizes the ultralow-grade waste heat of the desulphurization slurry to treat the wastewater, and greatly reduces the operation cost. The method creatively combines the smoke plume treatment in the air pollution field and the desulfurization wastewater in the water pollution field, breaks through the separation of mass transfer and heat transfer, organically combines the mass transfer and the heat transfer, innovatively adopts vacuum condensation to recover the ultralow-grade waste heat of the desulfurization slurry, and synchronously solves the problem of zero discharge of white smoke plume and wastewater. The vacuum condensation cooling technology capable of synchronously solving the water balance problem is adopted, and the waste heat of the slurry is utilized to flash-evaporate the desulfurization wastewater in a vacuum environment, so that the purpose of cooling the slurry is achieved. Meanwhile, white smoke plume is eliminated by adopting the technical mode of cooling by smoke, taking water and then heating, thus saving energy and protecting environment.
In conclusion, the white smoke plume and wastewater reduction cooperative treatment system for wet desulphurization eliminates white smoke, realizes wastewater reduction treatment, realizes zero wastewater discharge, and is energy-saving and environment-friendly.
Drawings
The invention will be further described with reference to the accompanying drawings and examples thereof.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In fig. 1, the white plume and wastewater reduction cooperative treatment system for wet desulphurization comprises a desulphurization tower 1 provided with a flue gas inlet a on the side surface and used for desulphurization treatment of flue gas, a steam chamber 2-1 arranged on the lower part, a permeable membrane 2-2 arranged in the middle part, a flue gas vacuum membrane water intake device 2 arranged on the upper part and connected with a flue gas outlet on the top of the desulphurization tower and provided with a flue gas chamber 2-3, a flue gas reheating device 3 connected with the flue gas chamber outlet of the flue gas vacuum membrane water intake device, and a steam condensing system 4 connected with the steam chamber of the flue gas vacuum membrane water intake device.
The invention relates to a white smoke plume of wet desulphurization and wastewater reduction cooperative treatment system, wherein a steam condensation system 4 comprises a condensation tower 4-1 connected with a steam chamber of a smoke vacuum membrane water taking device, a demister 4-2 positioned in the condensation tower and arranged at the upper part of the condensation tower, a vacuum pump 4-3 connected with the side surface of the upper part of the condensation tower through a pipeline, a spray device 4-4 positioned at the lower part of the demister and arranged on the condensation tower, a cooling tower 4-5 connected with the spray device through a connecting pipeline, a cooling tower water delivery pump 4-6 arranged on the connecting pipeline between the spray device and the cooling tower, and a cooling tower water return pump 4-7 arranged on the connecting pipeline between the bottom of the condensation tower and the bottom of the cooling tower.
According to the white smoke plume and wastewater reduction cooperative treatment system for wet desulphurization, a water taking device for the smoke by using a vacuum membrane method is provided, an inlet of a smoke chamber is connected with a desulphurization tower, and an outlet of the smoke chamber is connected with a smoke reheating device; the permeable membrane is a hollow fiber membrane or a hydrophilic porous ceramic membrane; the steam chamber is in vacuum state, and the inside is filled with water vapor permeated by the permeable membrane.
The invention relates to a white smoke plume and wastewater reduction cooperative treatment system for wet desulphurization, wherein a smoke reheating device is a steam reheater.
In addition, in fig. 1, the flue gas outlet b.
It should be understood that the above-described embodiments are merely exemplary of the present invention, and that various changes and modifications in the form, construction, features and spirit of the invention described in the claims should be included in the scope of the invention.
Claims (4)
1. The utility model provides a white plume of wet flue gas desulfurization and waste water minimizing cooperative management system which characterized in that, is equipped with the desulfurizing tower that the flue gas entry carries out desulfurization treatment including the side, and the lower part sets up the steam chamber, and the middle part sets up the osmotic membrane, and upper portion sets up the flue gas chamber and the flue gas vacuum membrane process water intake device that is connected with desulfurizing tower top exhanst gas outlet, and the flue gas reheating device that is connected with the flue gas chamber export of flue gas vacuum membrane process water intake device, the steam condensing system that links to each other with the steam chamber of flue gas vacuum membrane process water intake device.
2. The system of claim 1, wherein the steam condensing system comprises a condensing tower connected to a steam chamber of the device for extracting water from the flue gas by vacuum membrane method, a demister located inside the condensing tower and installed on the upper part of the condensing tower, a vacuum pump connected to the side of the upper part of the condensing tower through a pipe, a spray device located on the lower part of the demister and installed on the condensing tower, a cooling tower connected to the spray device through a connecting pipe, a cooling tower water pump installed on the connecting pipe between the spray device and the cooling tower, and a cooling tower water return pump installed on the connecting pipe between the bottom of the condensing tower and the bottom of the cooling tower.
3. The white plume of wet desulphurization and the wastewater decrement cooperative treatment system of claim 1, characterized in that the flue gas vacuum membrane method water intake device has a flue gas chamber inlet connected to the desulfurizing tower and a flue gas chamber outlet connected to the flue gas reheating device; the permeable membrane is a hollow fiber membrane or a hydrophilic porous ceramic membrane; the steam chamber is in vacuum state, and the inside is filled with water vapor permeated by the permeable membrane.
4. The system for cooperative control of white plume and wastewater generated by wet desulfurization according to claim 1, wherein the flue gas reheating device is a steam reheater.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910325850.1A CN111821802A (en) | 2019-04-23 | 2019-04-23 | Wet desulphurization white plume and wastewater reduction cooperative treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910325850.1A CN111821802A (en) | 2019-04-23 | 2019-04-23 | Wet desulphurization white plume and wastewater reduction cooperative treatment system |
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| CN111821802A true CN111821802A (en) | 2020-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113825370A (en) * | 2021-09-29 | 2021-12-21 | 华南理工大学 | System and method for radiating heat of phase-change heat exchange cold plate driven by refrigerating pump combined with vapor chamber |
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