CN106000026A - Wet flue gas desulfurization device adopting series connection - Google Patents
Wet flue gas desulfurization device adopting series connection Download PDFInfo
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- CN106000026A CN106000026A CN201610328266.8A CN201610328266A CN106000026A CN 106000026 A CN106000026 A CN 106000026A CN 201610328266 A CN201610328266 A CN 201610328266A CN 106000026 A CN106000026 A CN 106000026A
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- flue gas
- desulfurization
- grade desulfurizing
- wet flue
- cleaning mixture
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- 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
-
- 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
- B01D53/73—After-treatment of removed components
-
- 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
- B01D53/78—Liquid phase processes with gas-liquid contact
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a wet flue gas desulfurization device adopting series connection. The wet flue gas desulfurization device comprises a primary desulfurization unit, a partition group, a cleaning solution collection unit, a secondary desulfurization unit and a demisting unit which are connected in series, wherein the primary desulfurization unit comprises a primary desulfurization liquid oxidation area and a primary desulfurization area sequentially from bottom to top; the partition group comprises a bracket, U-shaped bottom plates and an orifice plate sequentially from bottom to top; the cleaning solution collection unit comprises a cleaning solution collection main pipe, an overflow pipe and a cleaning solution tank; the secondary desulfurization unit comprises a secondary desulfurization area and desulfurization liquid spray nozzles; the demisting unit comprises a demister, a demister flushing water device and a flue gas outlet sequentially from bottom to top. According to a method, the primary desulfurization unit performs desulfurization with a limestone-gypsum method; the secondary desulfurization unit performs desulfurization with a natrium-alkali method; the final desulfurization efficiency is controlled by regulating the pH value of the cleaning solution of the secondary desulfurization unit. Purified flue gas is exhausted from the flue gas outlet after mist in the flue gas is removed by the demisting unit.
Description
Technical field
The invention belongs to the technical field of a kind of wet flue gas desulfurizer, relate to wet flue gas grading desulfurization technology and the structure of wet method tandem desulfurizing tower.
Background technology
Atmospheric pollution now is the most serious, some areas are perplexed by haze weather, atmospheric pollution becomes the key factor of restriction society sustainable and healthy development, 13 planning propose " deeply implementing prevention and cure of pollution action plan; carry forward vigorously pollutant discharge in compliance with the standard and total amount reduces discharging ", this not only needs to accelerate economic transition, optimize the structure of production and reduce the discharge of pollutant, also needing to upgrades to existing Pollutant Treatment equipment meets tightened up discharge standard, thus reaches the purpose that the total amount of pollutant reduces discharging.
Sulfur dioxide is one of Air Pollutant Discharge, and in sulfur dioxide and air, gas pollutant carries out the Atmospheric Chemistry reaction of complexity, forms sulfate, nitrate second particle, gas pollutant is converted into solid pollutant, directly results in PM2.5 and raises.
The medium-and-large-sized coal-burning power plant of China's overwhelming majority uses wet fuel gas desulfurizing technology (WFGD), according to the difference of desulfurizing agent, limestone can be divided into again--gypsum wet desulfurization, Dual alkali wet desulphurization, soda wet desulphurization, the ammonia process of desulfurization, magnesium oxide method desulfurization etc..By most widely used limestone--as a example by gypsum wet desulfurization (coal-burning power plant of more than 90% uses limestone--gypsum), its desulfuration efficiency is attained by more than 90%, sulfur dioxide in flue gas concentration of emission after purification is not higher than 200 milligrams/cubic metre, but flue gas still contains a small amount of sulfuric acid mist, inorganic salt microgranule (being formed in sweetening process), enter in air, pollutant atmosphere.Due to design structure, desulfurizing agent, the restriction of operating cost, existing spray column is difficult to the raising desulfuration efficiency of another step, it is impossible to reach the minimum discharge standard that government department requires.
Summary of the invention
Goal of the invention: set up a dividing plate group in the middle and upper part of existing spray column, the scrubbing section carrying out improved spray column is divided into two-stage, and every one-level can isolated operation.First grade desulfurizing uses limestone--gypsum, preliminary desulfuration efficiency 90%；Two-grade desulfurizing uses sodium alkali, and desulfuration efficiency more than 98%, sulfur dioxide emissioning concentration is by two-grade desulfurizing control.Two kinds of desulfurizing agents use in same spray column, are greatly improved desulfuration efficiency, the effective discharge reducing pollutant.
Technical scheme: a kind of tandem wet flue gas desulfurizer, described device is composed in series by first grade desulfurizing device, dividing plate group, cleaning mixture collection device, two-grade desulfurizing device and a demister, described first grade desulfurizing device is followed successively by first grade desulfurizing liquid (lime stone slurry) zoneofoxidation, first grade desulfurizing district from lower to upper, in first grade desulfurizing district, it is disposed with smoke inlet, doctor solution nozzle from lower to upper.Described dividing plate group is followed successively by support, U-shaped chassis, orifice plate from lower to upper, and U-shaped chassis is rack-mount by bolt, and there is angle of inclination (8-12 degree) on U-shaped chassis, and orifice plate is laid on U-shaped chassis.Described cleaning mixture collection device is made up of the female pipe of cleaning mixture collection, overflow pipe, washing liquid tank, cleaning mixture falls and then drops to U-shaped chassis on orifice plate, and the cleaning mixture being pooled to be connected with U-shaped chassis under gravity is collected mother's pipe and then entered washing liquid tank by overflow pipe.Flushing water introduces from one end, U-shaped chassis, is the most also pooled to the female pipe of cleaning mixture collection and enters washing liquid tank by overflow pipe.Described two-grade desulfurizing device has two-grade desulfurizing district, doctor solution nozzle.Described demister and flue gas desulfurization device are integral type structure, are arranged on two-grade desulfurizing device, and described demister has demister, mist eliminator flushing water device, exhanst gas outlet the most successively.
A kind of tandem wet flue gas desulfurizer, it is characterised in that desulfurized step is: flue gas uses desulfurization by lime gypsum method with first grade desulfurizing cleaning mixture counter current contacting, this level after the bottom of first grade desulfurizing device entrance desulfurizing tower, and desulfuration efficiency is up to 90%；Then flue gas enters two-grade desulfurizing device by dividing plate group, and flue gas is when by dividing plate group, and the solid particle in flue gas collides dividing plate and changes direction, due to the effect of inertia force, makes solid particle separate from flue gas and is washed liquid capture；Two-grade desulfurizing device uses sodium alkali desulfurization, and soda activity is high, has the highest desulfurization degree (more than 98%)；Control final desulfuration efficiency by the pH value of regulation two-grade desulfurizing cleaning mixture, make sulfur dioxide emissioning concentration meet the minimum discharge standard of administration request.Flue gas after desulfurizing and purifying is discharged from exhanst gas outlet after the droplet removed in flue gas of demister.
Beneficial effect: owing to using the form of tandem desulfurization, first grade desulfurizing agent is lime stone slurry, and two-grade desulfurizing agent is soda solution.When first grade desulfurizing, the sulfur dioxide of 90% has been removed, and uses the amount of soda to greatly reduce during two-grade desulfurizing；Limestone abundance and cheap, can make up and run inferior position costly when using sodium alkali desulfurization completely.Soda activity is high, still can guarantee that the efficiency of two-grade desulfurizing in the case of relatively low liquid-gas ratio, and sodium alkali can overcome the disadvantages that limestone-gypsum method easily block, the shortcoming of corrosion easy to wear.When isolated operation, two-step desulfurization device can reach the desulfurization degree of more than 90%, is ensureing in the case of desulfuration efficiency, the operating load scalable of firsts and seconds, is adapted to different operating conditions, stable and desulfuration efficiency can reach more than 98%.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is dividing plate group structural representation.
In figure: 1--desulfurizing tower；2--doctor solution nozzle；Mother's pipe collected by 3--doctor solution；4--rinses Jellyfish pipe；5--dividing plate group；6--doctor solution nozzle；7--demister；8--doctor solution collecting tank；9--circulating pump；10--circulating pump；11--flushing water nozzle；12--support；13--tower wall；14--bolt；15--U shape chassis；16--orifice plate；17--aperture；A--one-level cleaning mixture zoneofoxidation；B--first grade desulfurizing district；C--two-grade desulfurizing district；Desulfurizing agent 1--lime stone slurry；Desulfurizing agent 2--sodium hydroxide solution.
Detailed description of the invention
Below in conjunction with Fig. 1,2, the present invention is elaborated: described device is composed in series by first grade desulfurizing device, dividing plate group, cleaning mixture collection device, two-grade desulfurizing device and a demister, and described first grade desulfurizing device is followed successively by first grade desulfurizing liquid (lime stone slurry) zoneofoxidation, first grade desulfurizing district from lower to upper；In first grade desulfurizing district, it is disposed with smoke inlet, doctor solution nozzle from lower to upper.Described dividing plate group is followed successively by support, U-shaped chassis, orifice plate (percent opening 30%-40%) from lower to upper, and U-shaped chassis is rack-mount by bolt, and there is (8-12 degree) angle of inclination on U-shaped chassis, and orifice plate is laid on U-shaped chassis.Described cleaning mixture collection device is made up of the female pipe of cleaning mixture collection, overflow pipe, washing liquid tank；Cleaning mixture falls and then drops to U-shaped chassis on orifice plate, and the cleaning mixture being pooled to be connected with U-shaped chassis under gravity is collected mother's pipe and then entered washing liquid tank by overflow pipe.Flushing water introduces from one end, U-shaped chassis, is the most also pooled to the female pipe of cleaning mixture collection and enters washing liquid tank by overflow pipe.Described two-grade desulfurizing device has two-grade desulfurizing district, doctor solution nozzle.Described demister and flue gas desulfurization device are integral type structure, are arranged on two-grade desulfurizing device, and described demister has demister, mist eliminator flushing water device, exhanst gas outlet the most successively.
A kind of tandem wet flue gas desulfurizer, it is characterised in that desulfurized step is: flue gas uses desulfurization by lime gypsum method with first grade desulfurizing cleaning mixture counter current contacting, this level after the bottom of first grade desulfurizing device entrance desulfurizing tower, and desulfuration efficiency is up to 90%；Then flue gas enters two-grade desulfurizing device by dividing plate group, and flue gas is when by dividing plate group, and the solid particle in flue gas collides dividing plate and changes direction, due to the effect of inertia force, makes solid particle separate from flue gas and is washed liquid capture；Two-grade desulfurizing device uses sodium alkali desulfurization, and soda activity is high, has the highest desulfurization degree (more than 98%)；Control desulfuration efficiency by the pH value of regulation two-grade desulfurizing cleaning mixture, make sulfur dioxide emissioning concentration reach the minimum discharge standard of administration request.Flue gas after desulfurizing and purifying is discharged from exhanst gas outlet after the droplet in demister removes flue gas.
Claims (9)
1. a tandem wet flue gas desulfurizer, is composed in series by first grade desulfurizing device, dividing plate group, cleaning mixture collection device, two-grade desulfurizing device and a demister.
A kind of tandem wet flue gas desulfurizer the most according to claim 1, it is characterised in that: first grade desulfurizing device is followed successively by first grade desulfurizing liquid (lime stone slurry) zoneofoxidation, first grade desulfurizing district from lower to upper.
A kind of tandem wet flue gas desulfurizer the most according to claim 1, it is characterised in that: first grade desulfurizing district, it is disposed with smoke inlet, doctor solution nozzle from lower to upper.
A kind of tandem wet flue gas desulfurizer the most according to claim 1, it is characterized in that, dividing plate group is followed successively by support, U-shaped chassis, orifice plate (percent opening 20%-30%) from lower to upper, U-shaped chassis is rack-mount by bolt, there is angle of inclination (8-12 degree) on U-shaped chassis, and orifice plate is laid on U-shaped chassis.
A kind of tandem wet flue gas desulfurizer the most according to claim 1, it is characterized in that: cleaning mixture collection device is made up of the female pipe of cleaning mixture collection, overflow pipe, washing liquid tank, cleaning mixture falls and then drops to U-shaped chassis on orifice plate, and the cleaning mixture being pooled to be connected with U-shaped chassis under gravity is collected mother's pipe and then entered washing liquid tank by overflow pipe.
A kind of tandem wet flue gas desulfurizer the most according to claim 1, it is characterised in that: flushing water introduces from one end, U-shaped chassis, is the most also pooled to the female pipe of cleaning mixture collection and enters washing liquid tank by overflow pipe.
A kind of tandem wet flue gas desulfurizer the most according to claim 1, it is characterised in that: two-grade desulfurizing device has two-grade desulfurizing district, doctor solution nozzle.
A kind of tandem wet flue gas desulfurizer the most according to claim 1, it is characterized in that: demister and flue gas desulfurization device are integral type structure, being arranged on two-grade desulfurizing device, demister has demister, mist eliminator flushing water device, exhanst gas outlet the most successively.
A kind of tandem wet flue gas desulfurizer the most according to claim 1, it is characterised in that: control final desulfuration efficiency by the pH value of regulation two-grade desulfurizing cleaning mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610328266.8A CN106000026A (en) | 2016-05-18 | 2016-05-18 | Wet flue gas desulfurization device adopting series connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610328266.8A CN106000026A (en) | 2016-05-18 | 2016-05-18 | Wet flue gas desulfurization device adopting series connection |
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| Publication Number | Publication Date |
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| CN106000026A true CN106000026A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610328266.8A Withdrawn CN106000026A (en) | 2016-05-18 | 2016-05-18 | Wet flue gas desulfurization device adopting series connection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108579376A (en) * | 2017-12-19 | 2018-09-28 | 潍坊友容实业有限公司 | Anticorrosion flue gas desulfurization heat-exchange system suitable for salt-soda soil |
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| US20080257157A1 (en) * | 2004-05-08 | 2008-10-23 | Qingbao Huang | Device for the Removal of Soot Dust of Fuel Oil Combustion |
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| CN103846005A (en) * | 2014-03-10 | 2014-06-11 | 北京国电龙源环保工程有限公司 | Wet process flue gas desulfurization device and method for classified washing |
| CN204107307U (en) * | 2014-06-20 | 2015-01-21 | 北京中冶隆生环保科技发展有限公司 | The multiple stage turbocharger turbulent flow wet desulphurization device of flue gas |
| CN204841396U (en) * | 2015-07-27 | 2015-12-09 | 航天环境工程有限公司 | SOx/NOx control integration absorbing device |
| CN205127723U (en) * | 2015-11-27 | 2016-04-06 | 江苏广鸿环境工程有限公司 | High -efficient doublestage subregion sprays desulfurizing tower |
-
2016
- 2016-05-18 CN CN201610328266.8A patent/CN106000026A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080257157A1 (en) * | 2004-05-08 | 2008-10-23 | Qingbao Huang | Device for the Removal of Soot Dust of Fuel Oil Combustion |
| CN101053744A (en) * | 2007-02-13 | 2007-10-17 | 浙江天蓝脱硫除尘有限公司 | Segmented calcium and sodium double alkali method desulfurizing technology and device thereof |
| CN102553427A (en) * | 2011-12-26 | 2012-07-11 | 浙江天蓝环保技术股份有限公司 | Process and device for flue gas wet desulphurization using carbide slag or white clay as desulfurizing agent |
| CN103721548A (en) * | 2014-01-17 | 2014-04-16 | 东南大学 | Desulfurization device and desulfurization method for promoting removal of PM2.5 in clean flue gas after wet desulphurization |
| CN103846005A (en) * | 2014-03-10 | 2014-06-11 | 北京国电龙源环保工程有限公司 | Wet process flue gas desulfurization device and method for classified washing |
| CN204107307U (en) * | 2014-06-20 | 2015-01-21 | 北京中冶隆生环保科技发展有限公司 | The multiple stage turbocharger turbulent flow wet desulphurization device of flue gas |
| CN204841396U (en) * | 2015-07-27 | 2015-12-09 | 航天环境工程有限公司 | SOx/NOx control integration absorbing device |
| CN205127723U (en) * | 2015-11-27 | 2016-04-06 | 江苏广鸿环境工程有限公司 | High -efficient doublestage subregion sprays desulfurizing tower |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108579376A (en) * | 2017-12-19 | 2018-09-28 | 潍坊友容实业有限公司 | Anticorrosion flue gas desulfurization heat-exchange system suitable for salt-soda soil |
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Application publication date: 20161012 |