CN108744941A - A kind of the spray column desulphurization system and method for high-order arrangement - Google Patents
A kind of the spray column desulphurization system and method for high-order arrangement Download PDFInfo
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- CN108744941A CN108744941A CN201810418311.8A CN201810418311A CN108744941A CN 108744941 A CN108744941 A CN 108744941A CN 201810418311 A CN201810418311 A CN 201810418311A CN 108744941 A CN108744941 A CN 108744941A
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- desulfurization
- slurries
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- flue gas
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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
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of spray column desulphurization systems of high-order arrangement, spray column including being connected on bubble tower smoke outlet, the spray column includes pallet rectification desulfurization zone, at least one layer of spraying zone, mist eliminating zone and slurries collecting region, and pallet rectification desulfurization zone is used for the uniformly distributed SO from the bubble tower2Flue gas, and further to the SO2Flue gas carries out desulfurization, and spraying zone is used for the SO from pallet rectification desulfurization zone2Flue gas sprays desulfurization again by slurries, and mist eliminating zone is used to remove the droplet in the desulfurization fume from the spraying zone, and the slurries are delivered to the bubble tower and recycled by slurries collecting region for collecting the slurries from the spraying zone.The invention also discloses a kind of spray column sulfur methods of high-order arrangement.The present invention have the advantages that can high-order arrangement, desulfuration efficiency it is high, energy-saving.
Description
Technical field
The present invention relates to flue gas desulfurization fields, more particularly to a kind of the spray column desulphurization system and method for high-order arrangement.
Background technology
For the coal-burning power plant using bubble tower flue gas desulfurization technique, the desulfuration efficiency of bubble tower is generally 95%, if
Realize that minimum discharge, the desulfuration efficiency of bubble tower need to be increased to 98.5% or more using bubble tower.By the shadow for being bubbled tower structure
It rings, needs to carry out Overall Reconstruction to original bubble tower, be equivalent to a newly-built new absorption tower in investment, the duration is not only transformed
Length, investment are big, while there is also extreme difficulties on Ground arrangement.
Chinese patent Authorization Notice No. CN202336294U, authorized announcement date on July 18th, 2012, the title of innovation and creation
Slot is absorbed for spray type desulfurization absorption tower slurries, that application discloses a kind of collection spray-absorption liquid and returns to the device of absorption,
By absorbing slot and conduit, it is pooled in slurry pool after the slurries after spray are collected.Its shortcoming is slurry pool from body
Product and weight are big, cannot be satisfied the requirement of high-order arrangement.
Chinese patent application notification number CN1041759794A, application publication date on July 8th, 2015, the title of innovation and creation
For the method for flue gas desulfurization.Which disclose a kind of method of flue gas desulfurization, flue gas, which is passed through in pre- desulfurizing tower, carries out pre- desulfurization,
The flue gas generated after pre- desulfurizing tower desulfurization is passed through main desulfurizing tower and carries out outer row after secondary desulfuration.Its desulfurizing agent used is cost
Higher sodium hydroxide, magnesium hydroxide and calcium hydroxide etc., pre- desulfurization need to carry out stringent monitoring, ability to the pH of desulfurizing agent
Ensure that the effect of two-grade desulfurizing is up to standard.
Chinese patent application notification number CN106178919A, application publication date on December 7th, 2016, the title of innovation and creation
For wave slurries device and multi-cycle flue gas desulfurization spray tower.Which disclose a kind of wave slurries device and multi-cycles
Flue gas desulfurization spray tower, umbraculiferous multilayer deflector import upper layer sprayed slurry for collecting upper layer sprayed slurry
Individual slurry pool ensures the freshness of slurries.Water conservancy diversion plate shape therein is more complicated, and manufacturing cost is high, and installation difficulty is big,
And the slurry pool of the upper layer sprayed slurry of individually designed installation also increases cost.
Invention content
The purpose of the invention is to overcome flue gas desulfurization of the existing technology to absorb, transformation project is long in time limit, invests
Greatly, the problem of place anxiety, provides a kind of slurries aggregating apparatus scheme of desulfuration absorbing tower, and the slurries of the desulfuration absorbing tower collect
Device has the advantages that small investment, short time limit, occupation of land are few.
To achieve the goals above, one aspect of the present invention provides a kind of spray column desulphurization system of high-order arrangement, including support
Consolidation flow desulfurization area, at least one layer of spraying zone, mist eliminating zone and slurries collecting region, the slurries collecting region is for collecting from described
The slurries of spraying zone, and the slurries are delivered to the bubble tower and are recycled；The slurries collecting region includes bottom plate, water conservancy diversion
Pipe, external collector tube, the bottom plate, diversion pipe, external collector tube are arranged in the lower section of inlet flue duct, the bottom plate and described lead
Flow tube entrance connects, and the draft tube outlets are connected with the external liquid collecting tube inlet, the external collector tube outlet and cycle
Pump intake connects, and the circulating-pump outlet is connected with circulating line, and the circulating line is connected with spray tube.
Preferably, the slurries are lime stone slurry.
Preferably, pallet rectification desulfurization zone includes pallet and holds liquid porous plate；The pallet is for uniformly coming from institute
State the SO of bubble tower2Flue gas；The liquid porous plate of holding is for increasing gas-liquid contact time and contact area, further to the SO2
Flue gas carries out desulfurization.
Preferably, the spraying zone includes spray tube and nozzle, to the further desulfurization of flue gas after rectification.
Preferably, the spray direction of the nozzle is opposite with the flow direction of flue gas so that slurries are more abundant with smoke contacts.
Preferably, the mist eliminating zone includes demister and cleaning water pipe, understands the liquid in flue gas, reaches discharge standard.
Preferably, the demister includes but unlimited ridge type or tubular type.
Preferably, the bottom plate and diversion pipe ensure the uniformity of slurries horizontal by 7 ° of angles.
Second aspect of the present invention provides a kind of spray column sulfur method of high-order arrangement, includes the following steps：
Step 1：SO after bubble tower desulfurization2It is whole that flue gas enters the high-order spray column progress being arranged in above bubble tower
Stream is uniformly distributed and slurries spray desulfurization；
Step 2：Spray column is discharged after demisting is handled in flue gas after desulfurization；
Step 3：It collects the slurries after spray and is delivered to bubble tower recycling.
Preferably, the slurries are pumped into the slurry pool recycling of the bubble tower by circulating pump, and aoxidize wherein
Form gypsum.
Through the above technical solutions, former demister platform increases seat height position arrangement spray tower systems newly after bubble tower, no
But the load of slurry weight when improving desulfuration efficiency, reduce absorption tower body height, while decreasing absorption tower operation,
The condition for creating absorption tower high position arrangement, increases the flexibility of arrangement, has saved construction investment and floor space.
Description of the drawings
Fig. 1 is the structure principle chart of present system.
Reference sign
Bottom plate 1；Inlet flue duct 2；Pallet 3；Spray tube 4；Nozzle 5；Demister 6；Clean water pipe 7；Exhaust pass 8；Cycle
Pump 9；Circulating line 10；External collector tube 11；Diversion pipe 12.
Specific implementation mode
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right " typically refers to
Illustrated orientation, " inside and outside " refer to shown position.In Fig. 1, lower section arrow indicates the flue gas after bubble tower desulfurization process, top
Arrow indicates the flue gas through spray column desulfurization process, being discharged after demisting.
As shown in Figure 1, a kind of spray column desulphurization system of high-order arrangement, including be connected to bubble tower smoke outlet into
Mouth flue 2, flue gas enter spray column after bubble tower desulfurization, by inlet flue duct 2 and carry out deep desulfuration.It is described for uniformly coming from
The SO of bubble tower2The pallet 3 of flue gas, to the SO from pallet rectification desulfurization zone2Flue gas sprays desulfurization again by slurries
Spray tube 4 and nozzle 5, the demister 6 for removing the droplet in the desulfurization fume from the spraying zone and cleaning demister
The cleaning water pipe 7 of upper structure, bottom plate 1, external collector tube 11 and diversion pipe 12 for collecting the slurries from the spraying zone,
For the slurries to be delivered to the circulating pump 9 and circulating line 10 and exhaust pass 8 that the bubble tower recycles.
Specifically, lime stone slurry reacts in bubble tower with the sulfur dioxide in flue gas, calcium sulfite is generated, to remove
The sulfur dioxide in flue gas is removed, fresh lime stone slurry is consumed.Flue gas in bubble tower after desulfurization, into spray column, with
Fresh lime stone slurry secondary response again, further deep removal sulfur dioxide, the slurries after spray can recycle, and work as stone
Lime stone slurry reaction to a certain extent after, bubble tower slurry pool can be imported and continue to carry out desulfurization process to former flue gas, and in drum
It is ultimately oxidized as calcium sulfate in bubble column slurry pool.
Specifically, after flue gas carries out first desulfurization by bubble tower, the pallet 3 through spray column carries out rectification, adjusts flue gas
Flow velocity and flow direction, uniformly distributed flue gas, then the further desulfurization process of liquid layer is held through porous on pallet, flue gas continues up flowing,
It is inversely contacted with the fresh limestone slurries sprayed downwards by nozzle 5, when increasing flue gas with the contact of fresh limestone slurries
Between and contact area, and make gas liquid reaction it is more uniform, desulfurization is more thorough.
Specifically, the flue gas through spraying desulfurization is expelled directly out containing a large amount of drops and a little slurries and is unfavorable for environmental protection, and
And a large amount of fresh slurries of consumption, it needs to carry out demisting to it.Herein it is emphasized that present invention meaning demister includes but not
It is limited to ridge type or tubular demister, after the flue gas after deep desulfuration is contacted with drop therein and slurries with demister 6, cigarette
Gas is because of flow velocity height, and density is small, and is discharged from the gap of demister 6, and drop and slurries are then attached on demister, are made by gravity
With and flow into bottom plate 1, finally import external collector tube 11.The slurries adhered on demister 6 by one section of working time or fouling
It is more, demister 6 is cleaned using cleaning water pipe 7, to increase defogging effect.
Specifically, external collector tube 11 and diversion pipe 12 are horizontal by 7 ° of angles so that the slurries after spray are being received
Collection is uniformly mixed during flowing back into external collector tube 11, by the continue working of circulating pump 9, reduces slurries in collector tube 11
In deposited phenomenon saved energy consumption and cost of investment it is not necessary that blender is arranged.By the way that external collector tube is arranged, instead of biography
The effect of system slurry pool so that the load of spray column is reduced, and has the condition of high-order arrangement, relies on the demisting of traditional bubble tower
Device platform can install the spray column of high-order arrangement, multistage deep desulfuration be carried out to flue gas, to reach discharge standard, protection ring
Border.
A kind of high-order arrangement spray column sulfur method is to be used as first grade desulfurizing tower using original bubble tower, flue gas is by one
After grade bubble tower desulfurization, two level spray column is entered by inlet flue duct 2, by 3 rectification of pallet, flue gas even distribution effect is optimized,
Flue gas carries out second of desulphurization reaction, part SO with the porous liquid layer of holding on pallet simultaneously2It is absorbed by slurries, the particle in flue gas
Object is also removed again.Hereafter flue gas enters two layers of spraying zone, and flue gas third time is reacted with the slurries that nozzle 5 sprays,
SO2Further emission limit is removed to hereinafter, particulate matter is further washed simultaneously, and completion third time desulfurization process is passed through
Demister 6 removes droplet, reaches and is discharged into air through exhaust pass 8 after minimum discharge standard.
Specifically, fresh lime stone slurry adds in collector tube 11, by the use of external collector tube 11, instead of
The slurry pool of existing spray column reduces about 8-10 meters of absorption tower body height, slurry weight when reducing absorption tower operation
At least 2000 tons of load creates the condition of spray column high position arrangement, it is possible thereby to utilize original bubble tower demister platform position
It sets, arranges spray column, realize under the premise of not carrying out large-scale redevelopment to bubble tower, using existing space, flue gas is carried out
Multistage desulfuration reaches discharge standard.
Slurries after desulfurization avoid the limestone particle precipitation in slurries, together by the continue working of slurry circulating pump 9
When save agitating device, reduce energy consumption.After slurries after spray absorb certain density sulfur dioxide, cycle is utilized
Branch pipe on the outlet conduit of pump 9 is discharged into bubble tower slurry pool and is continuing with, and the further quilt in bubble tower slurry pool
It utilizes, because the more former flue gas of the flue gas of spray-absorption, wherein content of sulfur dioxide has declined to a great extent, so the lime after spray
Stone slurries still can in the slurry pool of bubble tower to former flue gas carry out desulphurization reaction, finally in the slurry pool of bubble tower into
Row oxidation forms gypsum, and high position arrangement spray column is not provided with stock tank and blender, oxidation fan and its oxidation wind system, saves
Energy consumption and cost of investment.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited thereto.At this
In the range of the technology design of invention, a variety of simple variants, including each particular technique can be carried out to technical scheme of the present invention
Feature is combined in any suitable manner.In order to avoid unnecessary repetition, the present invention is to various combinations of possible ways
No longer separately illustrate.But it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to the present invention
Protection domain.
Claims (10)
1. a kind of spray column desulphurization system of high-order arrangement, it is characterised in that, the spray column is connected on the SO2 flue gases of bubble tower
Outlet end and a high position are arranged in above the bubble tower；
The spray column includes pallet rectification desulfurization zone, at least one layer of spraying zone, mist eliminating zone and slurries collecting region；
Pallet rectification desulfurization zone is used for the uniformly distributed SO from the bubble tower2Flue gas, and to the SO2Flue gas carries out desulfurization；
The spraying zone is used for the SO from pallet rectification desulfurization zone2Flue gas sprays desulfurization again by slurries；
The mist eliminating zone is used to remove the droplet in the desulfurization fume from the spraying zone；
The slurries are delivered to the bubble tower and followed by the slurries collecting region for collecting the slurries from the spraying zone
Ring uses；
The slurries collecting region includes bottom plate (1), diversion pipe (12) and external collector tube (11), the bottom plate (1), diversion pipe
(12) and external collector tube (11) is arranged in the lower sections of inlet flue duct (2), the bottom plate (1) and the diversion pipe (12) entrance
End connection, diversion pipe (12) outlet end are connected with external collector tube (11) arrival end, the external collector tube (11)
Outlet end is connected with circulating pump (9) arrival end, and circulating pump (9) outlet end is connected with circulating line (10) arrival end, described
Circulating line (10) outlet end is connected to bubble tower slurry pool.
2. the spray column desulphurization system of high-order arrangement according to claim 1, which is characterized in that the slurries are lime stone
Slurries.
3. the spray column desulphurization system of high-order arrangement according to claim 1, which is characterized in that the pallet rectification desulfurization
Area includes pallet (3) and holds liquid porous plate；
The pallet (3) is used for the uniformly distributed SO2 flue gases from the bubble tower；
The liquid porous plate of holding further carries out desulfurization for increasing gas-liquid contact time and contact area to the SO2 flue gases.
4. the spray column desulphurization system of high-order arrangement according to claim 1, which is characterized in that the spraying zone includes spray
Shower pipe (4) is equipped with several nozzles (5) on the spray tube.
5. the spray column desulphurization system of high-order arrangement according to claim 4, which is characterized in that the spray of the nozzle (5)
It is opposite with the flow direction of flue gas to drench direction so that slurries are more abundant with smoke contacts.
6. the spray column desulphurization system of high-order arrangement according to claim 1, which is characterized in that the mist eliminating zone includes removing
Day with fog (6) and cleaning water pipe (7)；
The demister (6) is used to remove the liquid pearl after desulfurization in smog；
The cleaning water pipe (7) is used to clean the fouling on demister.
7. the spray column desulphurization system of high-order arrangement according to claim 6, which is characterized in that the demister (6) is
Ridge type or tubular type.
8. the spray column desulphurization system of high-order arrangement according to claim 1, which is characterized in that the bottom plate (1) and lead
Flow tube (12) is horizontal by 7 ° of angles.
9. a kind of spray column sulfur method of high-order arrangement, which is characterized in that include the following steps：
(1) SO after bubble tower desulfurization2Flue gas enters the high-order spray column progress rectification being arranged in above bubble tower and is evenly distributed with and starches
Liquid sprays desulfurization；
(2) spray column is discharged after demisting is handled in the flue gas after desulfurization；
(3) slurries after spray are collected and are delivered to bubble tower recycling.
10. the spray column sulfur method of high-order arrangement according to claim 9, which is characterized in that step is starched described in (3)
The slurry pool that liquid is pumped into the bubble tower by circulating pump recycles, and oxidation forms gypsum wherein.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810418311.8A CN108744941A (en) | 2018-05-04 | 2018-05-04 | A kind of the spray column desulphurization system and method for high-order arrangement |
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| CN201810418311.8A CN108744941A (en) | 2018-05-04 | 2018-05-04 | A kind of the spray column desulphurization system and method for high-order arrangement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368792A (en) * | 2019-08-19 | 2019-10-25 | 北京首钢国际工程技术有限公司 | A kind of double tower Two-way Cycle wet desulphurization device for wearing series-parallel flue |
| CN111330418A (en) * | 2020-04-13 | 2020-06-26 | 华能国际电力股份有限公司 | Energy-saving flow equalizing desulfurization absorption tower based on high-order arrangement |
| CN115646173A (en) * | 2022-11-07 | 2023-01-31 | 国网新疆电力有限公司电力科学研究院 | Environment-friendly desulphurization unit of power plant waste gas |
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| CN107261778A (en) * | 2017-06-19 | 2017-10-20 | 拉萨煜隆能源科技有限公司 | A kind of flue gas high-efficiency desulfurization equipment and processing method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107261778A (en) * | 2017-06-19 | 2017-10-20 | 拉萨煜隆能源科技有限公司 | A kind of flue gas high-efficiency desulfurization equipment and processing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368792A (en) * | 2019-08-19 | 2019-10-25 | 北京首钢国际工程技术有限公司 | A kind of double tower Two-way Cycle wet desulphurization device for wearing series-parallel flue |
| CN111330418A (en) * | 2020-04-13 | 2020-06-26 | 华能国际电力股份有限公司 | Energy-saving flow equalizing desulfurization absorption tower based on high-order arrangement |
| CN115646173A (en) * | 2022-11-07 | 2023-01-31 | 国网新疆电力有限公司电力科学研究院 | Environment-friendly desulphurization unit of power plant waste gas |
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Application publication date: 20181106 |