CN109107347A - A kind of system for desulfuration and denitration and its technique - Google Patents
A kind of system for desulfuration and denitration and its technique Download PDFInfo
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- CN109107347A CN109107347A CN201810934740.0A CN201810934740A CN109107347A CN 109107347 A CN109107347 A CN 109107347A CN 201810934740 A CN201810934740 A CN 201810934740A CN 109107347 A CN109107347 A CN 109107347A
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- flue gas
- absorbing liquid
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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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- 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
- B01D53/14—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 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
- B01D53/14—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 absorption
- B01D53/1418—Recovery of products
-
- 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
- B01D53/14—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 absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/50—Combinations of absorbents
-
- 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
Abstract
The present invention relates to chemical technology fields, especially desulfurization denitration method, comprising the following steps: (1) boiler smoke is pre-processed by flue gas pre-processing device；(2) flue gas after air-introduced machine will be pretreated is sent into spray column, and absorbing liquid is the mixed liquor of sodium chlorite and liquor natrii hypochloritis；(3) flue gas discharges after spray, washing, foam absorbing, filtering in spray column；(4) absorbing liquid in circulatory pool, which is periodically extracted out, is sent to waste liquor treatment equipment and is recycled.Beneficial effects of the present invention: wet desulphurization denitration dust collecting integral of the present invention is suitble to low-temperature flue gas purification, reduces investment outlay；Spray column is using spray, washing, foam absorbing, filtering level Four purification, and denitrification efficiency is high, and efficiency of dust collection can reach 96% or more, and desulfuration efficiency can reach 99% or more, good purification；Spray column is purified using screw spraying, and liquid gas mixability is high, and sufficiently, liquid-gas ratio is low, and L/Q is about 3 for reaction, and purification efficiency is high.
Description
Technical field
The present invention relates to chemical technology field, especially a kind of system for desulfuration and denitration and its technique.
Background technique
In recent years, environment is seriously polluted in the discharge of China SO2 and NOx, causes the evils such as acid rain to omit natural calamity, becomes
SO2 and NOx pollution problem one of the countries with the most serious ..., the gas pollution control method of traditional simple function, primary investment are big
Operating cost is high, and with the continuous improvement of national requirements for environmental protection, gas pollution control cost is higher and higher, is increasingly difficult to enterprise
To bear；Therefore, the new technology and equipment for developing simultaneous SO_2 and NO removal has become the hot spot studied both at home and abroad currently, than more typical
Wet- FGD+SCR group technology, removal effect is good, however initial cost and operating cost are high, easily forms secondary pollution state
The investigative technique of interior flue gas and desulfurizing and denitrifying mainly has: the dry method based on plasma method, self-drying corona discharge method, with
Wet process, NaClO2 oxidative absorption method based on Fe Absorption via Chemical Complexation NaClO2 oxidative absorption method are considered as that most effective desulfurization is de-
Nitre new method, however since Low Concentration NaCl O2 removal effect is unsatisfactory, and NaClO2 is expensive, excessively high cost makes
Be difficult industrialize.
Summary of the invention
The purpose of the present invention is to solve the denitrification efficiency of traditional system for desulfuration and denitration is low, removing is not thorough, and
And problem at high cost, and a kind of removal efficiency height and system for desulfuration and denitration and its technique at low cost are provided.
The technical solution adopted by the present invention are as follows: a kind of system for desulfuration and denitration, including sequentially connected flue gas pre-processing device,
Air-introduced machine, spray column and circulatory pool, the spray column include columnar shell, and upper shell is provided with to be connect with air-introduced machine
Air inlet and the spray head connecting with circulatory pool are provided with inner cylinder in shell, and inner cylinder bottom, which is provided with opening, makes inner cylinder interior or exterior space
Connection, inner cylinder top are provided with gas outlet, and air inlet is arranged along a tangential direction declines flue gas along the side wall spiral of shell, inner cylinder
Interior upper end is provided with filter device and filters out moisture after purification in flue gas, and outer casing bottom is provided with liquid outlet and connect with circulatory pool.
Further, the spray angle of spray head is identical as the spiral traffic direction of flue gas.
Further, open height is higher than the liquid level of outer casing bottom absorbing liquid, is open along the tangential direction setting of inner cylinder, opens
Mouth direction is identical as the flue gas hand of spiral, is threaded into flue gas when entering inner cylinder from shell.
Further, inner cylinder bottom is provided with communicating pipe, and communicating pipe, outer end was between shell and inner cylinder and higher than outer cylinder bottom
Portion's absorbing liquid liquid level for flue gas enter, communicating pipe inner end in inner cylinder and be lower than inner cylinder bottom absorbing liquid liquid level.
Further, communicating pipe is helical form identical with flue gas spiral operation rotation direction, and inner end is uniformly distributed more along helix
A exhaust outlet, exhaust outlet, which is obliquely installed, makes flue gas spiral in absorbing liquid.
Further, communicating pipe is the double annular shapes being connected, and communicating pipe, outer ring was between shell and inner cylinder and higher than outer
Cylinder bottom absorbing liquid liquid level for flue gas enter, communicating pipe inner ring in inner cylinder and lower than inner cylinder bottom absorbing liquid liquid level, it is interior
The along the circumferential direction upper uniformly distributed multiple exhaust outlets of ring, exhaust outlet, which is obliquely installed, makes flue gas spiral in absorbing liquid.
Further, inner cylinder bottom is provided with foam maker and makes to be enriched with foam in the absorbing liquid of inner cylinder bottom.
Further, circulatory pool is connect with the storage tank of storage absorbing liquid, and storage tank at the uniform velocity supplements absorbing liquid to circulatory pool.
Further, circulatory pool is connect with waste liquor treatment equipment, is periodically handled the absorbing liquid in circulatory pool.
Further, waste liquor treatment equipment is filter press, and the solid of extrusion is mainly that nitrate and sulfate recycle,
Supernatant is discharged or is continued to use after filtering.
A kind of desulfurization denitration method, includes the following steps:
(1) boiler smoke is pre-processed by flue gas pre-processing device；
(2) flue gas after air-introduced machine will be pretreated is sent into spray column, while storage tank at the uniform velocity supplements absorbing liquid, water to circulatory pool
Absorbing liquid in circulatory pool is sent into spray column by pump, is dusted desulphurization denitration to flue gas by absorbing liquid, extra in spray column
Absorbing liquid return in circulatory pool, the absorbing liquid is that 20 ~ 40% sodium chlorite and 5 ~ 15% liquor natrii hypochloritis press 1:2 extremely
1:3.5 ratio mixes；
(3) flue gas discharges after spray, washing, foam absorbing, filtering in spray column；
(4) absorbing liquid in circulatory pool, which is periodically extracted out, is sent to waste liquor treatment equipment and is recycled.
Further, the waste liquor treatment equipment in step (4) is filter press, and the solid of extrusion is mainly nitrate and sulfuric acid
Salt recycles, and supernatant is discharged or continued to use after filtering.
Further, the absorbing liquid in step (2) is that 30% sodium chlorite and 11% liquor natrii hypochloritis press 4:11 ratio
Example mixes.
Further, it is added with foaming agent in the absorbing liquid in step (2), makes the foam more crypto set in spray column.
Further, when the pH value of absorbing liquid extra in spray column in step (2) is lower than 5, addition sodium hydroxide is carried out
It neutralizes, makes the pH value of absorbing liquid between 6-7.
Beneficial effects of the present invention:
1, wet desulphurization denitration dust collecting integral of the present invention is suitble to low-temperature flue gas purification, reduces investment outlay；
2, spray column of the invention is using spray, washing, foam absorbing, filtering level Four purification, and denitrification efficiency is high, dedusting
Efficiency can reach 96% or more, and desulfuration efficiency can reach 99% or more, good purification；
3, spray column of the invention is purified using screw spraying, and liquid gas mixability is high, and sufficiently, liquid-gas ratio is low, and L/Q is about for reaction
3, purification efficiency is high；
4, absorbing liquid of the invention using sodium chlorite and liquor natrii hypochloritis, effect at low cost is good；
5, non-maintaining without mechanical equipments such as rotations inside spray column of the invention, it will not block, service life easy to maintenance
It is long；
6, the nitrate and sulfate recoverable that desulfurizing and denitrifying process of the invention filters out, economize on resources.
Detailed description of the invention
Fig. 1 is the structure diagram of inventive desulfurization denitrating system；
Fig. 2 is the main view of spray column of the present invention；
Fig. 3 is the sectional view along A-A of Fig. 2 of the present invention；
Fig. 4 is the spray column main view of another embodiment of the present invention；
Fig. 5 is the communicating pipe top view of another embodiment of the present invention；
Fig. 6 is the main view of the another embodiment of communicating pipe of the invention；
Fig. 7 is the top view of the another embodiment of communicating pipe of the invention；
Fig. 8 is inventive desulfurization denitrating technique flow chart.
In figure: 1- flue gas pre-processing device, 2- air-introduced machine, 3- spray column, 4- circulatory pool, 5- storage tank, 6- liquid waste processing are set
Standby, 301- shell, 302- air inlet, 303- spray head, 304- inner cylinder, 305- opening, the gas outlet 306-, 307- filter device,
308- liquid outlet, 309- communicating pipe, 310- exhaust outlet, 311- absorbing liquid, 312- foam, 313- foam maker.
Specific embodiment
Invention is further explained with reference to the accompanying drawing.
Specific embodiment 1.
As shown in Figures 1 to 3, a kind of system for desulfuration and denitration of the invention, including sequentially connected flue gas pre-processing device 1,
Air-introduced machine 2, spray column 3 and circulatory pool 4, the spray column 3 include columnar shell 301, and 301 upper end of shell is provided with and draws
The air inlet 302 that blower 2 connects and the spray head 303 that connect with circulatory pool 4 are provided with inner cylinder 304,304 bottom of inner cylinder in shell 301
Portion, which is provided with opening 305, makes 304 interior or exterior space connection of inner cylinder, and 305 height of opening are higher than the liquid of 301 bottom absorbing liquid 311 of shell
Face is provided with gas outlet 306 at the top of inner cylinder 304 and purified flue gas is discharged, and air inlet 302 is arranged along a tangential direction, makes flue gas
Side wall spiral along shell 301 declines (path as shown in block curve in Fig. 2), while the spray angle and cigarette of spray head 303
The spiral traffic direction of gas is identical, sprays absorbing liquid along the flow direction of flue gas, does not hinder flow of flue gas, make water mist and cigarette
Gas sufficiently merges during spiral declines, simultaneous SO_2 and NO removal and dedusting, keeps liquid gas mixability high anti-using screw spraying
Should sufficiently, liquid-gas ratio is low, and L/Q is about 3, and purification efficiency is high, and flue gas is after rotational flow and spray purifies, to sulfide, nitrogen oxides
Purification can reach 77%, dust separation efficiency can reach 73-80%；Then flue gas from 304 bottom of inner cylinder be provided with opening 305 into
Enter to inside inner cylinder, opening 305 is arranged along the tangential direction of inner cylinder 304, and 305 direction of opening is identical as the flue gas hand of spiral, makes
Flue gas is threaded into then spiral (path as shown in dashed curve in Fig. 2), cigarette when entering inner cylinder 304 from shell 301
When by 311 surface of absorbing liquid of 301 bottom of shell, absorbed liquid washing, general efficiency of dust collection takes off gas up to 80% or more
For sulphur efficiency up to 91% or so, denitration efficiency can reach 86% or so；304 bottom of inner cylinder is provided with foam maker 313, makes inner cylinder bottom
Absorbing liquid 311 on be enriched with foam, the foam of absorbed liquid carries out third time purification, general dedusting when flue gas upward spiral
Efficiency is up to 96%, and for the removal efficiency of sulfide up to 99% or more, denitration efficiency can reach 90% or more；Last flue gas is passing through
Upper end is provided with filter device 307 and filters out moisture after purification in flue gas in inner cylinder 304, and the steam of absorbing liquid is recycled, from going out
Purified flue gas is discharged in port 306, and 301 bottom of shell is provided with liquid outlet 308 and connect with circulatory pool 4, will be more in spray column 3
Remaining absorbing liquid is discharged in circulatory pool, recycles absorbing liquid, maintains the liquid level of absorbing liquid in spray column 3.
In order to improve desulphurization denitration dust removing effects, circulatory pool 4 is connect with the storage tank 5 of storage absorbing liquid, and storage tank 5 is to circulatory pool
4 at the uniform velocity supplement absorbing liquid, maintain the concentration of strong oxidizer in absorbing liquid, a large amount of absorbing liquid disposably cannot be added to circulatory pool
Make the excessive concentration of strong oxidizer, a large amount of yellow green gas can be generated.
Circulatory pool 4 is connect with waste liquor treatment equipment 6, is periodically handled the absorbing liquid in circulatory pool 4, liquid waste processing is set
Standby 6 preferably use filter press, and the solid of extrusion is mainly that nitrate and sulfate recycle, and economize on resources, supernatant passes through
It discharges or continues to use after filter.
Specific embodiment 2.
As shown in figures 1,4 and 5, a kind of system for desulfuration and denitration of the invention, including sequentially connected flue gas pre-processing device 1,
Air-introduced machine 2, spray column 3 and circulatory pool 4, the spray column 3 include columnar shell 301, and 301 upper end of shell is provided with and draws
The air inlet 302 that blower 2 connects and the spray head 303 that connect with circulatory pool 4 are provided with inner cylinder 304,304 bottom of inner cylinder in shell 301
Portion, which is provided with opening 305, makes 304 interior or exterior space connection of inner cylinder, and 305 height of opening are higher than the liquid of 301 bottom absorbing liquid 311 of shell
Face is provided with gas outlet 306 at the top of inner cylinder 304 and purified flue gas is discharged, and air inlet 302 is arranged along a tangential direction, makes flue gas
Side wall spiral along shell 301 declines (path as shown in block curve in Fig. 2), while the spray angle and cigarette of spray head 303
The spiral traffic direction of gas is identical, sprays absorbing liquid along the flow direction of flue gas, does not hinder flow of flue gas, make water mist and cigarette
Gas sufficiently merges during spiral declines, simultaneous SO_2 and NO removal and dedusting, keeps liquid gas mixability high anti-using screw spraying
Should sufficiently, liquid-gas ratio is low, and L/Q is about 3, and purification efficiency is high, and flue gas is after rotational flow and spray purifies, to sulfide, nitrogen oxides
Purification can reach 77%, dust separation efficiency can reach 73-80%；304 inner cylinder bottom of inner cylinder is provided with communicating pipe 309, connection
309 outer end of pipe is between shell 301 and inner cylinder 304 and is higher than 301 bottom absorbing liquid liquid level of outer cylinder for flue gas entrance, communicating pipe
Absorbing liquid 311 liquid level of 309 inner ends in inner cylinder 304 and lower than 304 bottom of inner cylinder, communicating pipe 309 is and flue gas spiral is run
The identical helical form of rotation direction, inner end uniformly distributed multiple exhaust outlets 310 along helix, exhaust outlet 310, which is obliquely installed, is inhaling flue gas
Spiral (path as shown in dashed curve in Fig. 2) in liquid 311 is received, flue gas is in the absorbing liquid by interior 304 bottom of barrel shell
When 311, absorbed liquid washing, general efficiency of dust collection is up to 83% or more, and up to 93% or so, denitration efficiency can reach desulfuration efficiency
87% or so；304 bottom of inner cylinder is provided with foam maker 313, makes to be enriched with foam in the absorbing liquid 311 of inner cylinder bottom, the upward spiral shell of flue gas
The foam of absorbed liquid carries out third time purification when screwing on liter, and for general efficiency of dust collection up to 96%, the removal efficiency of sulfide is reachable
99% or more, denitration efficiency can reach 90% or more；Last flue gas is being provided with the filter of filter device 307 by upper end in inner cylinder 304
Except the moisture after purification in flue gas, the steam of absorbing liquid is recycled, purified flue gas, 301 bottom of shell is discharged from gas outlet 306
Portion is provided with liquid outlet 308 and connect with circulatory pool 4, and absorbing liquid extra in spray column 3 is discharged in circulatory pool, absorbing liquid is followed
Ring maintains the liquid level of absorbing liquid in spray column 3.
In order to improve desulphurization denitration dust removing effects, circulatory pool 4 is connect with the storage tank 5 of storage absorbing liquid, and storage tank 5 is to circulatory pool
4 at the uniform velocity supplement absorbing liquid, maintain the concentration of strong oxidizer in absorbing liquid, a large amount of absorbing liquid disposably cannot be added to circulatory pool
Make the excessive concentration of strong oxidizer, a large amount of yellow green gas can be generated.
Circulatory pool 4 is connect with waste liquor treatment equipment 6, is periodically handled the absorbing liquid in circulatory pool 4, liquid waste processing is set
Standby 6 preferably use filter press, and the solid of extrusion is mainly that nitrate and sulfate recycle, and economize on resources, supernatant passes through
It discharges or continues to use after filter.
Specific embodiment 3.
As shown in Figure 6 and Figure 7, the another embodiment of communicating pipe 309, communicating pipe 309 are the double annular shapes being connected,
Communicating pipe, 309 outer ring entered between shell 301 and inner cylinder 304 and higher than 301 bottom absorbing liquid liquid level of outer cylinder for flue gas, even
Absorbing liquid 311 liquid level of 309 inner ring of siphunculus in inner cylinder 304 and lower than 304 bottom of inner cylinder, inner ring are along the circumferential direction upper uniformly distributed more
A exhaust outlet 310, exhaust outlet 310, which is obliquely installed, makes flue gas spiral in absorbing liquid 311.
Remaining feature is identical as specific embodiment 2 to be no longer described in detail.
As shown in figure 8, inventive desulfurization method of denitration, includes the following steps:
(1) boiler smoke is pre-processed by flue gas pre-processing device；
(2) flue gas after air-introduced machine will be pretreated is sent into spray column, while storage tank at the uniform velocity supplements absorbing liquid, water to circulatory pool
Absorbing liquid in circulatory pool is sent into spray column by pump, is dusted desulphurization denitration to flue gas by absorbing liquid, extra in spray column
Absorbing liquid return in circulatory pool, the absorbing liquid is that 20 ~ 40% sodium chlorite and 5 ~ 15% liquor natrii hypochloritis press 1:2 extremely
1:3.5 ratio mixes；
(3) flue gas discharges after spray, washing, foam absorbing, filtering in spray column；
(4) absorbing liquid in circulatory pool, which is periodically extracted out, is sent to waste liquor treatment equipment and is recycled.
Further, the waste liquor treatment equipment in step (4) is filter press, and the solid of extrusion is mainly nitrate and sulfuric acid
Salt recycles, and supernatant is discharged or continued to use after filtering.
Further, the absorbing liquid in step (2) preferably uses 30% sodium chlorite to press with 11% liquor natrii hypochloritis
4:11 ratio mixes.
Further, it is added with foaming agent in the absorbing liquid in step (2), makes the foam more crypto set in spray column.
Further, when the pH value of absorbing liquid extra in spray column in step (2) is lower than 5, addition sodium hydroxide is carried out
It neutralizes, makes the pH value of absorbing liquid between 6-7.
The present invention is used to handle the flue-gas dust-removing and desulfurization of various coal-burning boilers, good purification, long service life.The present invention
Desulfurization denitration method reach following technical requirements through overtesting:
Desulfuration efficiency >=99%
Denitration efficiency >=90%
Efficiency of dust collection >=96%
Gas outlet flue gas SO2Concentration of emission≤50mg/Nm3
Gas outlet flue gas NOx concentration of emission≤100mg/Nm3
Gas outlet dust emission concentration≤30mg/Nm3。
Claims (10)
1. a kind of system for desulfuration and denitration, including sequentially connected flue gas pre-processing device, air-introduced machine, spray column and circulatory pool,
Be characterized in that: the spray column includes columnar shell, upper shell be provided with the air inlet being connect with air-introduced machine and with follow
The spray head of cisterna ambiens connection, is provided with inner cylinder in shell, and inner cylinder bottom, which is provided with opening, makes inner cylinder interior or exterior space connection, at the top of inner cylinder
It is provided with gas outlet, air inlet is arranged along a tangential direction declines flue gas along the side wall spiral of shell, and upper end is provided in inner cylinder
Filter device filters out the moisture after purification in flue gas, and outer casing bottom is provided with liquid outlet and connect with circulatory pool.
2. a kind of system for desulfuration and denitration according to claim 1, it is characterised in that: the spray angle and flue gas of the spray head
Spiral traffic direction it is identical.
3. a kind of system for desulfuration and denitration according to claim 1, it is characterised in that: the open height is higher than outer casing bottom
The liquid level of absorbing liquid is open along the tangential direction setting of inner cylinder, and opening direction is identical as the flue gas hand of spiral, makes flue gas from shell
It is threaded into when into inner cylinder.
4. a kind of system for desulfuration and denitration according to claim 1, it is characterised in that: the inner cylinder bottom is provided with connection
Pipe, communicating pipe outer end between shell and inner cylinder and be higher than outer cylinder bottom absorbing liquid liquid level for flue gas entrance, communicating pipe inner end
Absorbing liquid liquid level in inner cylinder and lower than inner cylinder bottom.
5. a kind of system for desulfuration and denitration according to claim 4, it is characterised in that: the communicating pipe is to transport with flue gas spiral
The identical helical form of row rotation direction, inner end uniformly distributed multiple exhaust outlets along helix, exhaust outlet, which is obliquely installed, makes flue gas in absorbing liquid
Middle spiral.
6. a kind of system for desulfuration and denitration according to claim 1, it is characterised in that: the circulatory pool and storage absorbing liquid
Storage tank connection, storage tank at the uniform velocity supplement absorbing liquid to circulatory pool.
7. a kind of system for desulfuration and denitration according to claim 1, it is characterised in that: the circulatory pool and waste liquor treatment equipment
Connection, is periodically handled the absorbing liquid in circulatory pool.
8. a kind of desulfurization denitration method using any system for desulfuration and denitration of claim 1-7, it is characterised in that including following step
It is rapid:
(1) boiler smoke is pre-processed by flue gas pre-processing device；
(2) flue gas after air-introduced machine will be pretreated is sent into spray column, while storage tank at the uniform velocity supplements absorbing liquid, water to circulatory pool
Absorbing liquid in circulatory pool is sent into spray column by pump, is dusted desulphurization denitration to flue gas by absorbing liquid, extra in spray column
Absorbing liquid return in circulatory pool, the absorbing liquid is that 20 ~ 40% sodium chlorite and 5 ~ 15% liquor natrii hypochloritis press 1:2 extremely
1:3.5 ratio mixes；
(3) flue gas discharges after spray, washing, foam absorbing, filtering in spray column；
(4) absorbing liquid in circulatory pool, which is periodically extracted out, is sent to waste liquor treatment equipment and is recycled.
9. a kind of desulfurization denitration method according to claim 8, it is characterised in that: the absorbing liquid in the step (2) is
30% sodium chlorite and 11% liquor natrii hypochloritis are mixed in 4:11 ratio.
10. a kind of desulfurization denitration method according to claim 8, it is characterised in that: in the absorbing liquid in the step (2)
Added with foaming agent, make the foam more crypto set in spray column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810934740.0A CN109107347A (en) | 2018-08-16 | 2018-08-16 | A kind of system for desulfuration and denitration and its technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810934740.0A CN109107347A (en) | 2018-08-16 | 2018-08-16 | A kind of system for desulfuration and denitration and its technique |
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| CN109107347A true CN109107347A (en) | 2019-01-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114517723A (en) * | 2022-03-03 | 2022-05-20 | 威海市正大环保设备股份有限公司 | Marine desulfurization, denitrification and dedusting integrated device and method |
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| CN2522155Y (en) * | 2001-09-29 | 2002-11-27 | 温州阳光环保设备有限公司 | Heat-exchanging type sweetening cleaner |
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| CN203954970U (en) * | 2014-06-18 | 2014-11-26 | 广东科大环境工程有限公司 | The pneumatic desulfation dust-extraction device that revolves of mist sieve |
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| CN114517723A (en) * | 2022-03-03 | 2022-05-20 | 威海市正大环保设备股份有限公司 | Marine desulfurization, denitrification and dedusting integrated device and method |
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