CN111821835A - Energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device - Google Patents
Energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device Download PDFInfo
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- CN111821835A CN111821835A CN202010829838.7A CN202010829838A CN111821835A CN 111821835 A CN111821835 A CN 111821835A CN 202010829838 A CN202010829838 A CN 202010829838A CN 111821835 A CN111821835 A CN 111821835A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 93
- 230000023556 desulfurization Effects 0.000 title claims abstract description 92
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003546 flue gas Substances 0.000 claims abstract description 36
- 238000010521 absorption reaction Methods 0.000 claims abstract description 29
- 230000003647 oxidation Effects 0.000 claims abstract description 27
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 27
- 238000005507 spraying Methods 0.000 claims abstract description 24
- 239000002002 slurry Substances 0.000 claims abstract description 16
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 239000007921 spray Substances 0.000 claims description 26
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 19
- 238000000746 purification Methods 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 13
- 239000002250 absorbent Substances 0.000 claims description 12
- 230000002745 absorbent Effects 0.000 claims description 12
- 239000007800 oxidant agent Substances 0.000 claims description 12
- 230000001590 oxidative effect Effects 0.000 claims description 12
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 12
- 239000000428 dust Substances 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000004537 pulping Methods 0.000 claims description 6
- 235000010288 sodium nitrite Nutrition 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 5
- 230000003009 desulfurizing effect Effects 0.000 claims 3
- 239000007789 gas Substances 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 7
- 239000000779 smoke Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 229910052815 sulfur oxide Inorganic materials 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000005587 bubbling Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002918 waste heat Substances 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- 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
- B01D53/22—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 diffusion
- B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2251/00—Reactants
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- B01D2251/604—Hydroxides
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Abstract
The invention discloses an energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device which comprises a flue gas heat exchange region, a spraying scattering desulfurization region, a low-temperature denitration desulfurization oxidation tower, a low-temperature denitration desulfurization absorption tower and a staircase. The invention realizes the long-term operation without variable and simultaneously ensures the stability of the slurry density; through the denitration absorption of three steps of spraying a scattering desulfurization area, a low-temperature denitration desulfurization oxidation tower and a low-temperature denitration desulfurization absorption tower, the flue gas is purified to the maximum limit, the safety and no pollution of the discharged gas are ensured, and the ecological environment is protected.
Description
Technical Field
The invention relates to the technical field of energy conservation and environmental protection, in particular to an energy-saving and environment-friendly low-resistance film scattering dust removal desulfurization and denitrification device.
Background
At present, the economy of China is rapidly increased, each item of construction obtains huge achievements, but huge resources and environment costs are paid, the contradiction between the economic development and the resource environment is sharp day by day, and the reaction of the masses to the problem of environmental pollution is strong. This situation is directly related to unreasonable economic structure and extensive growth. The adjustment of an economic structure is not accelerated, the growth mode is changed, the resources can not be supported, the environment can not be accommodated, the society can not bear the resources, and the economic development is difficult to continue. Only by insisting on the saving development and the clean development, the economic, good and fast development can be realized. Meanwhile, the emission of greenhouse gases causes global warming, and is widely concerned by the international society. Further strengthening the energy conservation and emission reduction work, and meeting the urgent need of global climate change.
In order to adapt to the improvement of the environmental protection standard again, the atmospheric pollutants of the coal-fired boiler are about to implement an ultra-low emission limit, namely 10mg/Nm of particulate matters335mg/Nm of sulfur dioxide3Hydroxide 50mg/Nm3Based on a three-dimensional flue gas unit technology, an energy-saving low-resistance membrane scattering dust removal desulfurization and denitration unit is newly developed by combining an equipment heat exchange technology, a spraying scattering desulfurization technology, a low-temperature oxidation absorption denitration technology, a low-resistance membrane fine dust purification technology and the like, so that the waste heat of flue gas is recycled while the ultralow emission of particulate matters, sulfur dioxide and hydroxides is realized, and the dual purposes of energy conservation and emission reduction are achieved.
Disclosure of Invention
In view of the above, an energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device is needed, on one hand, the self-cleaning capability of the circulation device is realized, and on the other hand, the dual purposes of energy conservation and emission reduction are achieved by recycling the flue gas.
The utility model provides an energy-concerving and environment-protective low resistant membrane scattering dust removal SOx/NOx control device, by the flue gas heat transfer district, spray scattering desulfurization district, low temperature denitration SOx/NOx control tower, low temperature denitration SOx absorption tower and staircase and constitute, whole device is equipped with the staircase all around, the flue gas heat transfer district is located and sprays scattering desulfurization district upper end, sprays scattering desulfurization district one end and connects with the flue gas heat transfer district, sprays the scattering desulfurization district other end and connects with low temperature denitration SOx/NOx control tower, and low temperature denitration SOx/NOx control tower passes through the pipeline and connects with low temperature denitration SO.
Furthermore, the spraying scattering desulfurization area is provided with a spraying pipeline which is connected with the magnesium chloride slurry circulating tank; the spraying and scattering desulfurization area is provided with a magnesium chloride pulping tank, one end of the magnesium chloride pulping tank is connected with a process water gap and a steam hot water gap, and the other end of the magnesium chloride slurry circulating tank is connected with the magnesium chloride slurry circulating tank through a dosing pump.
Further, the low-temperature denitration desulfurization oxidation tower is provided with a denitration oxidant circulating pump, one end of the denitration oxidant circulating pump is connected with the inside of the low-temperature denitration desulfurization oxidation tower through a denitration pipeline, and a sodium nitrite finished product are connected with the other end of the oxidant circulating pump through a dosing pump.
Further, the low-temperature denitration and desulfurization absorption tower is provided with a sodium hydroxide preparation tank and a denitration absorbent circulating tank, the right end of the denitration absorbent circulating tank is connected with the inside of the low-temperature denitration and desulfurization absorption tower through a denitration absorption pipe, the left end of the denitration absorbent circulating tank is connected with a dosing pump in the sodium hydroxide preparation tank, and the right end of the sodium hydroxide preparation tank is connected with a process water gap and a manual dosing port.
Furthermore, a smoke inlet is arranged at the front end of the smoke heat exchange area, and a smoke outlet is arranged at the rear end of the smoke heat exchange area.
Further, spray heads are arranged in the spray scattering desulfurization area, the low-temperature denitration desulfurization oxidation tower and the low-temperature denitration desulfurization absorption tower, and the spray heads in the spray scattering desulfurization area are connected with the magnesium chloride slurry circulating tank through a circulating pump; the spray header in the low-temperature denitration and desulfurization oxidation tower is connected with a denitration oxidant circulating pump through a circulating pump; and the spray header in the low-temperature denitration and desulfurization absorption tower is connected with the denitration absorbent circulating tank through a circulating pump.
And furthermore, slag removers are arranged on two sides of the bottom end of the spraying and scattering desulfurization area.
Further, a layer of low-resistance film purification area is arranged in the low-temperature denitration and desulfurization oxidation tower; two layers of low-resistance membrane purification areas are arranged in the low-temperature denitration and desulfurization absorption tower.
The energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device provided by the invention has the advantages that: firstly, the automatic decontamination is realized by adopting a circulating pump through the condensation flow of atomized fluid, so that the long-term operation is free of variation, and the stability of the density of the slurry is ensured; secondly, the flue gas is purified to the maximum limit through the denitration absorption of three steps of a spraying scattering desulfurization area, a low-temperature denitration desulfurization oxidation tower and a low-temperature denitration desulfurization absorption tower, so that the safety and no pollution of the discharged gas are ensured, and the ecological environment is protected; finally, the slag remover adopted at the tower bottom can regularly clean the sewage without causing the blockage problem.
Drawings
FIG. 1 is a structural diagram of an energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device provided by the invention;
FIG. 2 is a structural view of an escalator of the energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device provided by the invention;
FIG. 3 is a structure diagram of a layer of low-resistance membrane purification area of the energy-saving environment-friendly low-resistance membrane scattering dust-removing desulfurization and denitrification device provided by the invention;
FIG. 4 is a structural diagram of a two-layer low-resistance membrane purification area of the energy-saving environment-friendly low-resistance membrane scattering dust-removing desulfurization and denitrification device provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
Referring to fig. 1, the energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device provided by the invention comprises a flue gas heat exchange area 100, a spraying scattering desulfurization area 200, a low-temperature denitration desulfurization oxidation tower 300, a low-temperature denitration desulfurization absorption tower 400 and an escalator 500, wherein the escalator 500 is arranged around the whole device, the flue gas heat exchange area 100 is positioned at the upper end of the spraying scattering desulfurization area 200, one end of the spraying scattering desulfurization area 200 is connected with the flue gas heat exchange area 100, the other end of the spraying scattering desulfurization area 200 is connected with the low-temperature denitration desulfurization oxidation tower 300, and the low-temperature denitration desulfurization oxidation tower 300 is connected with the low-temperature denitration desulfurization absorption tower 400 through a pipeline 305.
The spraying scattering desulfurization area 200 is provided with a spraying pipeline 206, and the spraying pipeline 206 is connected with a magnesium chloride slurry circulating tank 202; the spraying and scattering desulfurization area 200 is provided with a magnesium chloride pulping tank 201, one end of the magnesium chloride pulping tank 201 is connected with a process water gap 203 and a steam hot water gap 204, and the other end of the magnesium chloride slurry circulating tank 202 is connected with the magnesium chloride slurry circulating tank 202 through a dosing pump 205.
Low temperature denitration desulfurization oxidation tower 300 is equipped with denitration oxidant circulating pump 301, denitration oxidant circulating pump 301 one end is passed through denitration pipeline 304 and low temperature denitration desulfurization oxidation tower 300 internal connection, and inferior sodium nitrate finished product 302 and sodium nitrite finished product 303 are connected through dosing pump 205 and the oxidant circulating pump 301 other end.
The low-temperature denitration and desulfurization absorption tower 400 is provided with a sodium hydroxide preparation tank 401 and a denitration absorbent circulating tank 402, the right end of the denitration absorbent circulating tank 402 is connected with the inside of the low-temperature denitration and desulfurization absorption tower 400 through a denitration absorption pipe 404, the left end of the denitration absorbent circulating tank 402 is connected with a dosing pump 205 in the sodium hydroxide preparation tank 401, and the right end of the sodium hydroxide preparation tank 401 is connected with a process water gap 203 and a manual dosing port 403.
The front end of the flue gas heat exchange area 100 is provided with a flue gas inlet 101, and the rear end of the flue gas heat exchange area 100 is provided with a flue gas outlet 102.
And slag removers 105 are arranged on two sides of the bottom end of the spraying and scattering desulfurization area 200. The purpose of the slag remover 105 is to be able to clean up the sewage and dust residue problem regularly without causing a blockage problem.
A low-resistance membrane purification area 307 is arranged in the low-temperature denitration and desulfurization oxidation tower 300; two layers of low-resistance membrane purification areas 307-1 are arranged in the low-temperature denitration and desulfurization absorption tower 400. The first low-resistance film purification area 307 mainly plays a role in blocking fine dust and fog drops, and the second low-resistance film purification area 307-1 plays a role in blocking fine dust and fog drops on one hand and can be mixed with NO on the other hand through a liquid film2、SO2And (4) contact purification.
The working principle of the invention is that firstly, the flue gas enters the flue gas heat exchange area 100 through the flue gas inlet 101, the heat exchange area of the flue gas is increased through the heat exchanger in the flue gas heat exchange area 100, the heat in the flue gas is transferred out, the purposes of reducing the temperature of the flue gas and saving energy are achieved, and the heat supply area can be increased. And then the flue gas returns downwards to enter the spraying and scattering desulfurization area 200, and the flue gas is subjected to primary desulfurization and dust removal through scattering and bubbling (bubbling is an operation of strengthening mass transfer and heat transfer processes with low energy consumption), so that the gas-liquid contact surface is enlarged, and the flue gas is combined with slurry spraying in the magnesium chloride slurry circulation tank 202. Then the flue gas continuously rises to the low-temperature denitration and desulfurization oxidation tower 300, the flue gas passes through the sodium nitrite finished product 302 and the sodium nitrite finished product 303 in the low-temperature denitration and desulfurization oxidation tower 300 to react, and NO in the flue gas is converted into NO2Continuously rising to a low-resistance film purification area 307, and blocking part of fine dust and fog drops to fall; the flue gas enters the low-temperature denitration and desulfurization absorption tower 400 through a pipeline 305, is sprayed by the sodium hydroxide solution in the sodium hydroxide preparation tank 401, and is not removed with the rest NO2And SO2Chemical reaction, and raising the fume to two-layer low-resistance film purifying area 307-1 with dust, fog drop and NO2、SO2The smoke is purified and discharged through the smoke outlet 102 under the contact action of a liquid film in the two-layer low-resistance film purification area 307-1, so that the ultra-low emission of the smoke is achieved, and the environment is protected.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides an energy-concerving and environment-protective low resistant membrane scattering dust removal SOx/NOx control device, by flue gas heat transfer district (100), spray scattering desulfurization district (200), low temperature denitration SOx/NOx control oxidation tower (300), low temperature denitration SOx/NOx control absorption tower (400) and staircase (500) are constituteed, whole device is equipped with staircase (500) all around, its characterized in that, flue gas heat transfer district (100) are located sprays scattering desulfurization district (200) upper end, spray scattering desulfurization district (200) one end and flue gas heat transfer district (100) and connect, spray scattering desulfurization district (200) the other end and low temperature denitration SOx/NOx control oxidation tower (300) and connect, low temperature denitration SOx/NOx control oxidation tower (300) are connected through pipeline (305) and low temperature denitration SOx/.
2. The energy-saving environment-friendly low-resistance film scattering, dedusting, desulfurizing and denitrifying device according to claim 1, wherein the spraying scattering desulfurizing area (200) is provided with a spraying pipeline (206), and the spraying pipeline (206) is connected with a magnesium chloride slurry circulating tank (202); the spraying and scattering desulfurization area (200) is provided with a magnesium chloride pulping tank (201), one end of the magnesium chloride pulping tank (201) is connected with a process water gap (203) and a steam hot water gap (204), and the other end of the magnesium chloride slurry circulating tank (202) is connected with the magnesium chloride slurry circulating tank (202) through a dosing pump (205).
3. The energy-saving environment-friendly low-resistance membrane scattering dust-removing desulfurization and denitrification device according to claim 1, wherein the low-temperature denitration desulfurization oxidation tower (300) is provided with a denitration oxidant circulating pump (301), one end of the denitration oxidant circulating pump (301) is connected with the interior of the low-temperature denitration desulfurization oxidation tower (300) through a denitration pipeline (304), and a sodium nitrite finished product (302) and a sodium nitrite finished product (303) are connected with the other end of the oxidant circulating pump (301) through a dosing pump (205).
4. The energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device according to claim 1, wherein the low-temperature denitration and desulfurization absorption tower (400) is provided with a sodium hydroxide preparation tank (401) and a denitration absorbent circulation tank (402), the right end of the denitration absorbent circulation tank (402) is connected with the inside of the low-temperature denitration and desulfurization absorption tower (400) through a denitration absorption pipe (404), the left end of the denitration absorbent circulation tank (402) is connected with a dosing pump (205) in the sodium hydroxide preparation tank (401), and the right end of the sodium hydroxide preparation tank (401) is connected with a process water gap (203) and a manual dosing port (403).
5. The energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device as claimed in claim 1, wherein a flue gas inlet (101) is arranged at the front end of the flue gas heat exchange region (100), and a flue gas outlet (102) is arranged at the rear end of the flue gas heat exchange region (100).
6. The energy-saving environment-friendly low-resistance film scattering, dedusting, desulfurizing and denitrating device as claimed in claim 1, wherein spray headers (306) are arranged in the spray scattering desulfurization zone (200), the low-temperature denitration, desulfurization and oxidation tower (300) and the low-temperature denitration, desulfurization and absorption tower (400), and the spray headers (306) in the spray scattering desulfurization zone (200) are connected with the magnesium chloride slurry circulation tank (202) through a circulation pump (407); the spray header (306) in the low-temperature denitration and desulfurization oxidation tower (300) is connected with the denitration oxidant circulating pump (301) through a circulating pump (407); and the spray header (306) in the low-temperature denitration and desulfurization absorption tower (400) is connected with the denitration absorbent circulating tank (402) through a circulating pump (407).
7. The energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device according to claim 1, wherein slag removers (105) are arranged on two sides of the bottom end of the spraying scattering desulfurization area (200).
8. The energy-saving environment-friendly low-resistance film scattering dust-removing desulfurization and denitrification device as claimed in claim 1, wherein a low-resistance film purification area (307) is arranged in the low-temperature denitration desulfurization oxidation tower (300); two layers of low-resistance membrane purification areas (307-1) are arranged in the low-temperature denitration and desulfuration absorption tower (400).
Priority Applications (1)
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