CN109107357A - A kind of single column double circulation desulphurization system and sulfur removal technology - Google Patents
A kind of single column double circulation desulphurization system and sulfur removal technology Download PDFInfo
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- CN109107357A CN109107357A CN201810955336.1A CN201810955336A CN109107357A CN 109107357 A CN109107357 A CN 109107357A CN 201810955336 A CN201810955336 A CN 201810955336A CN 109107357 A CN109107357 A CN 109107357A
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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
- 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
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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
- 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
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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
- B01D53/73—After-treatment of removed components
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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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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
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- 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
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2251/606—Carbonates
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- 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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Abstract
The present invention relates to a kind of single column double circulation desulphurization system, which includes desulfurizing tower and oxidizing tower;Wherein the tower body of desulfurizing tower has smoke inlet, exhanst gas outlet, the first limestone slurry entrance, the first oxidation air entrance, calcium plaster outlet and the outlet of the first limestone slurry;It is provided with level-one spraying layer, pallet, second level spraying layer and demister from the bottom to top in desulfurizing tower;Level-one spraying layer is connected using pipeline and the first limestone slurry circulating pump by the outlet of the first limestone slurry;Demister is provided with mist eliminator flushing water system;Pallet connects oxidizing tower by pipeline;Oxidizing tower is additionally provided with the second limestone slurry entrance, the second oxidation air entrance and the outlet of the second limestone slurry;Second level spraying layer is connected using pipeline and the second limestone slurry circulating pump by the outlet of the second limestone slurry.Desulphurization system of the invention realizes higher desulfuration efficiency, while can obtain the very high gypsum of quality.
Description
Technical field
The present invention relates to pollutant process fields, and in particular to desulfurization process field.
Background technique
Existing desulphurization system is by " furnace matches a tower " principle.The slurries spray that haves three layers is set in each desulfurizing tower, exports SO2
Discharge value operation control is lower than 100mg/Nm3.It is right but with the promotion of social environment protective awareness and state's laws Perfection of education regulations and laws
Facility pollutant emission control is increasingly strict, it is desirable that SO2Discharge value will be lower than 50mg/Nm3, existing desulfurization equipment can not expire
Sufficient emission request.
Limestone-gypsum Wet Flue Gas Desulfurization Process technique is to be most widely used in the world and most reliable technique at present.The technique
Using lime stone slurry as absorbent, flue gas is washed in absorption tower by lime stone slurry, is reacted, with removal
SO in flue gas2, the calcium sulfite of generation is reacted by forcing oxidation to generate the calcium sulfate (gypsum) containing two crystallizations water.Lime
Stone-gypsum wet sulfur removal technology is mainly characterized in that: 1, desulfuration efficiency with higher, desulfurization effect compared with other sulfur removal technologies
Rate is up to 95% or more;2, there is lower absorbent stoichiometric ratio, generally take 1.05;3, liquid/gas is reduced by a relatively large margin
Than (L/G), reduce the energy consumption of desulphurization system;4, system reliability with higher, system availability is up to 98% or more;5,
It is good to boiler fired coal coal varitation adaptability, when coal-fired sulfur content increases, it can still keep higher desulfuration efficiency;6, to boiler
Load variations have good adaptability, in different flue gas load and SO2Under concentration, desulphurization system can still keep higher desulfurization
Efficiency and system stability.
Summary of the invention
To solve problems of the prior art, the invention proposes a kind of single column double circulation desulphurization system and desulfurization works
Skill.
As wherein one side of the invention, a kind of single column double circulation desulphurization system of the invention, which includes desulfurization
Tower and oxidizing tower;Wherein the tower body of desulfurizing tower has smoke inlet, exhanst gas outlet, the first limestone slurry entrance, the first oxidation empty
Gas entrance, calcium plaster outlet and the outlet of the first limestone slurry;It is provided with level-one spraying layer, support from the bottom to top in desulfurizing tower
Disk, second level spraying layer and demister;Pipeline and first circulation pump connection level-one spraying layer are used by the outlet of the first limestone slurry;
Demister is provided with mist eliminator flushing water system;Pallet connects oxidizing tower by pipeline;Oxidizing tower is additionally provided with the second lime stone
Starch entrance, the second oxidation air entrance and the outlet of the second limestone slurry;Pipeline and second are used by the outlet of the second limestone slurry
Circulating pump connects second level spraying layer.
Further, it is provided with diversion division in the tower body inner wall of desulfurizing tower, and is located at the top of pallet.Diversion division includes leading
Stream wall, rigid support portion and flexible support portion, rigid support portion and flexible support portion are used to support training wall.
Further, training wall meets brachistochrone curve in the section of vertical direction.
According further to another aspect of the present invention, the present invention proposes a kind of using above-mentioned single column double circulation desulphurization system progress
The technique of desulfurization, including, flue gas enters in desulfurizing tower from smoke inlet, and the lime stone slurry sprayed with level-one spraying layer inversely connects
Touching removing part SO2;Then flue gas inversely contacts removing part SO with the lime stone slurry that second level spraying layer sprays2;Then flue gas
It is discharged after demister demisting by exhanst gas outlet.
Further, the lime stone slurry that level-one spraying layer sprays forms desulfurization tower slurry pool, desulfurizing tower slurry in desulfurizing tower
Limestone slurry in pond is exported through the first limestone slurry, supplies level-one spraying layer by pipeline by first circulation pump.Desulfurizing tower slurry
Pond supplements limestone slurry by the first limestone slurry entrance, and oxidation air is passed through in desulfurization tower slurry pool by the first oxidation air entrance,
So that calcium sulfite oxidation is at calcium sulfate.The calcium plaster of formation is discharged by calcium plaster outlet.
Further, the pH value of desulfurization tower slurry pool is between 4.5 to 5.0, and low ph value is conducive to dissolution and the stone of lime stone
The crystallization of cream can obtain the very high gypsum of quality.
Further, after the limestone slurry that second level spraying layer sprays is by collection tray, shape in oxidizing tower is passed through by pipeline
At oxidizing tower stock tank, the limestone slurry of oxidizing tower stock tank is exported through the second limestone slurry, is supplied by second circulation pump by pipeline
Second level spraying layer.Desulfurization tower slurry pool supplements limestone slurry by the second limestone slurry entrance, and the second oxidation air entrance will aoxidize empty
Gas is passed through in desulfurization tower slurry pool, so that calcium sulfite oxidation is at calcium sulfate.
Further, for the pH value of oxidizing tower stock tank between 5.6 to 6.4, higher ph can obtain higher desulfurization effect
Rate reduces liquid-gas ratio, reduces circulating pump energy consumption.
Further, demister is rinsed using mist eliminator flushing water system.
The invention has the beneficial effects that:
1, complete desulfurization twice in an absorption tower, reached double-column in series effect, be suitable for Forms in High Sulfur Coals or
The exigent FGD system of person's desulfuration efficiency;
2, primary cycle pH value general control is between 4.5 to 5.0, and low ph value is conducive to dissolution and the gypsum of lime stone
Crystallization, can obtain the very high gypsum of quality;Secondary cycle pH value control between 5.6 to 6.4, higher ph can obtain compared with
High desulfuration efficiency reduces liquid-gas ratio, reduces circulating pump energy consumption;
3, it can be improved desulfuration efficiency using the diversion division with special construction, avoid fouling.
4. carrying out SO in sulphur removal treated flue gas using the system2≤35mg/Nm3, meet minimum discharge requirement.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Attached drawing 1 is the desulphurization system schematic diagram according to the specific embodiment of the invention;
Attached drawing 2 is the partial enlargement diagram according to diversion division in the specific embodiment of the invention.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to thoroughly understand the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened is fully disclosed to those skilled in the art.
A kind of single column double circulation desulphurization system of the invention, as shown in Figure 1, the system includes desulfurizing tower 1 and oxidizing tower 2;
Wherein there is the tower body of desulfurizing tower 1 smoke inlet 3, exhanst gas outlet 4, the first limestone slurry entrance 105 and the first oxidation air to enter
Mouth 106;It is provided with level-one spraying layer 101, pallet 109, second level spraying layer 102 and demister from the bottom to top in desulfurizing tower 2
103;And tower body is additionally provided with the first limestone slurry outlet 110, and is sprayed using pipeline and 108 connection level-one of first circulation pump
Drenching layer 101;Demister 103 is provided with mist eliminator flushing water system 104;Desulfurizing tower 2 is additionally provided with calcium plaster outlet 107;Support
Disk 109 connects oxidizing tower 2 by pipeline;Oxidizing tower 2 is additionally provided with the second limestone slurry entrance 202 and the second oxidation air entrance
203;Oxidizing tower 2 is additionally provided with the second limestone slurry outlet 205, and is sprayed using pipeline and 204 connection second level of second circulation pump
Drenching layer 102.
As a further improvement of the present invention, it is provided with diversion division 111 in the tower body inner wall of desulfurizing tower, and is located at pallet
109 top.Diversion division includes training wall 1111, rigid support portion 1112 and flexible support portion 1113, rigid support portion and bullet
Property support portion is used to support training wall.Training wall is flaky texture, and material is, for example, titanium alloy, can be in the impact of limestone slurry
Lower generation flexible deformation.Rigid support portion 1112 is for providing basic support force for training wall, and flexible support portion 1113 is for example
For spring etc., restoring force when flexible deformation occurs is provided for training wall, rigid support portion and flexible support portion can surround desulfurization
The inner wall setting of tower is multiple.Due to the inhomogeneities of the flowing of limestone slurry, under the impact of limestone slurry bullet occurs for training wall
Property deformation, after flexible deformation occurs, flexible support portion provides training wall and is restored to the restoring force of original-shape, therefore training wall energy
It enough shakes, avoids the slurries flowed down along training wall from forming " water curtain ", facilitate passing through for flue gas, can prevent from blocking flue gas,
Reduce flue gas by resistance, the pressure loss of flue gas is reduced, so that flue gas and second level spraying layer preferably carry out SO2It absorbs,
Improve desulfuration efficiency.
In addition, as a further improvement of the present invention, training wall 1111 meets brachistochrone song in the section of vertical direction
Line enables the limestone slurry on training wall to leave training wall rapidly and as early as possible, increases water conservancy diversion efficiency, avoid slurries in water conservancy diversion
Fouling is formed on wall.
According further to wherein another embodiment of the invention, the present invention proposes a kind of de- using above-mentioned single column Two-way Cycle
Sulphur system carries out the technique of desulfurization, including, flue gas enters in desulfurizing tower 3 from smoke inlet 3, sprays with level-one spraying layer 101
Lime stone slurry inversely contacts removing part SO2;Then flue gas is inversely contacted with the lime stone slurry that second level spraying layer 102 sprays
Remove part SO2;Then flue gas is discharged after demister demisting by exhanst gas outlet 4.
The lime stone slurry that level-one spraying layer 102 sprays forms desulfurization tower slurry pool 6 in desulfurizing tower, in desulfurization tower slurry pool 6
Limestone slurry through the first limestone slurry outlet 110, by first circulation pump 108 by pipeline supply level-one spraying layer 101.Desulfurization
Tower stock tank 6 supplements limestone slurry by the first limestone slurry entrance 105, and oxidation air is passed through de- by the first oxidation air entrance 106
In sulphur tower stock tank 6, so that calcium sulfite oxidation is at calcium sulfate.The calcium plaster of formation is discharged by calcium plaster outlet 107.Oxidizing tower
The pH value of stock tank is between 5.6 to 6.4.
After the limestone slurry that second level spraying layer 102 sprays is collected by pallet 109, shape in oxidizing tower 2 is passed through by pipeline 201
At oxidizing tower stock tank 7, the limestone slurry of oxidizing tower stock tank 7 is passed through through the second limestone slurry outlet 205 by second circulation pump 204
Pipeline supplies second level spraying layer 102.Desulfurization tower slurry pool 7 supplements limestone slurry by the second limestone slurry entrance 202, and the second oxidation is empty
Oxidation air is passed through in desulfurization tower slurry pool 6 by gas entrance 203, so that calcium sulfite oxidation is at calcium sulfate.The pH of desulfurization tower slurry pool
Value is between 4.5 to 5.0.
Mist eliminator flushing water system 104 is for being rinsed demister 103.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (9)
1. a kind of single column double circulation desulphurization system, it is characterised in that: the system includes desulfurizing tower (1) and oxidizing tower (2);Wherein take off
There is the tower body of sulphur tower (1) smoke inlet (3), exhanst gas outlet (4), the first limestone slurry entrance (105), the first oxidation air to enter
Mouth (106), calcium plaster outlet (107) and the first limestone slurry outlet (110);It is provided with from the bottom to top in desulfurizing tower (1)
Level-one spraying layer (101), pallet (109), second level spraying layer (102) and demister (103);It is exported by the first limestone slurry
(110) using pipeline and first circulation pump (108) connection level-one spraying layer (101);Demister (103) is provided with demister punching
Wash water system (104);Pallet (109) connects oxidizing tower (2) by pipeline;Oxidizing tower (2) is additionally provided with the second limestone slurry and enters
Mouth (202), the second oxidation air entrance (203) and the second limestone slurry outlet (205);(205) are exported by the second limestone slurry
Use pipeline and second circulation pump (204) connection second level spraying layer (102).
2. desulphurization system according to claim 1, it is characterised in that: be provided with diversion division in the tower body inner wall of desulfurizing tower
(111), and positioned at the top of pallet (109);The diversion division includes training wall (1111), rigid support portion (1112) and elasticity
Support portion (1113), rigid support portion and flexible support portion are used to support training wall.
3. desulphurization system according to claim 1 or 2, it is characterised in that: training wall (1111) is in the section of vertical direction
Meet brachistochrone curve.
4. a kind of technique for carrying out desulfurization using the described in any item single column double circulation desulphurization systems of claim 1-3, feature
Be: the technique includes that flue gas enters in desulfurizing tower (1) from smoke inlet (3), the lime sprayed with level-one spraying layer (101)
Stone slurries inversely contact removing part SO2;Then flue gas inversely contacts de- with the lime stone slurry that second level spraying layer (102) sprays
Except part SO2;Then flue gas is discharged after demister demisting by exhanst gas outlet (4).
5. technique according to claim 4, it is characterised in that: the technique further includes the stone that level-one spraying layer (102) sprays
Lime stone slurries are formed desulfurization tower slurry pool (6) in desulfurizing tower, and the limestone slurry in desulfurization tower slurry pool (6) goes out through the first limestone slurry
Mouth (110) passes through pipeline by first circulation pump (108) and supplies level-one spraying layer (101);Desulfurization tower slurry pool (6) is by the first lime
Stone starches entrance (105) and supplements limestone slurry, and oxidation air is passed through in desulfurization tower slurry pool (6) by the first oxidation air entrance (106),
The calcium plaster of formation is discharged by calcium plaster outlet (107).
6. technique according to claim 4 or 5, it is characterised in that: the pH value of desulfurization tower slurry pool is between 4.5 to 5.0.
7. according to the described in any item techniques of claim 4-6, it is characterised in that: the technique further includes second level spraying layer (102)
After the limestone slurry of ejection is collected by pallet (109), it is passed through in oxidizing tower (2) by pipeline (201) and forms oxidizing tower stock tank
(7), the limestone slurry of oxidizing tower stock tank (7) exports (205) through the second limestone slurry, passes through pipeline by second circulation pump (204)
It supplies second level spraying layer (102);Desulfurization tower slurry pool (7) supplements limestone slurry, the second oxidation by the second limestone slurry entrance (202)
Oxidation air is passed through in desulfurization tower slurry pool (6) by air intake (203).
8. according to the described in any item techniques of claim 4-7, it is characterised in that: the pH value of oxidizing tower stock tank 5.6 to 6.4 it
Between.
9. according to the described in any item techniques of claim 4-8, it is characterised in that: the technique further includes using mist eliminator flushing
Water system (104) is rinsed demister (103).
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110026073A (en) * | 2019-05-24 | 2019-07-19 | 湖南省湘衡盐化有限责任公司 | A kind of double circulation desulphurization device |
CN110201524A (en) * | 2019-05-23 | 2019-09-06 | 新疆天富环保科技有限公司 | A kind of wet desulphurization device and method of semi-dry desulphurization ash resource utilization |
CN110756034A (en) * | 2019-09-16 | 2020-02-07 | 浙江天蓝环保技术股份有限公司 | High-sulfur flue gas deep purification system and process |
CN110813043A (en) * | 2019-11-21 | 2020-02-21 | 湖南恒光科技股份有限公司 | Carbide slag/slurry flue gas desulfurization system and method |
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2018
- 2018-08-21 CN CN201810955336.1A patent/CN109107357A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110201524A (en) * | 2019-05-23 | 2019-09-06 | 新疆天富环保科技有限公司 | A kind of wet desulphurization device and method of semi-dry desulphurization ash resource utilization |
CN110026073A (en) * | 2019-05-24 | 2019-07-19 | 湖南省湘衡盐化有限责任公司 | A kind of double circulation desulphurization device |
CN110756034A (en) * | 2019-09-16 | 2020-02-07 | 浙江天蓝环保技术股份有限公司 | High-sulfur flue gas deep purification system and process |
CN110813043A (en) * | 2019-11-21 | 2020-02-21 | 湖南恒光科技股份有限公司 | Carbide slag/slurry flue gas desulfurization system and method |
CN110813043B (en) * | 2019-11-21 | 2022-03-04 | 湖南恒光科技股份有限公司 | Carbide slag/slurry flue gas desulfurization system and method |
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