CN109157941A - A kind of coal-fired plant flue gas dehumidifying emission-reducing system and technique - Google Patents
A kind of coal-fired plant flue gas dehumidifying emission-reducing system and technique Download PDFInfo
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- CN109157941A CN109157941A CN201811359065.XA CN201811359065A CN109157941A CN 109157941 A CN109157941 A CN 109157941A CN 201811359065 A CN201811359065 A CN 201811359065A CN 109157941 A CN109157941 A CN 109157941A
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- emission
- flue gas
- dehumidifying
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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
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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
- B01D53/002—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 condensation
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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 invention discloses a kind of coal-fired plant flue gas dehumidifying emission-reducing systems, including along the sequentially connected high-efficiency electric dust catcher of pipeline, wet desulphurization device and dehumidifying emission reduction device, the emission reduction device that dehumidifies includes cylindrical housings, enclosure interior is provided with pipe heat exchanger, wiper mechanism and the first demister, wiper mechanism includes sparge pipe and water distributor, the inner wall two sides of shell are provided with endless glide, the both ends of sparge pipe pass through endless glide sliding block and are slidably connected in endless glide, to drive the movement of sparge pipe, water distributor is fixedly installed on the roof of enclosure interior, and it is connected with the water inlet of case top, water distributor is connected to by hose with sparge pipe.The present invention can effectively reduce flue dust, SO2Equal multiple pollutants, improve the reliability and stability of the pollutant discharge in compliance with the standard such as flue dust, play good environmental benefit and social benefit.
Description
Technical field
The invention belongs to fume treatment technical fields, and in particular to a kind of coal-fired plant flue gas dehumidifying emission-reducing system and work
Skill.
Background technique
Advance to perfect order is transformed in current coal-burning power plant's minimum discharge, and coal-burning power plant is realizing minimum discharge (NOx < 50mg/Nm3、
SO2<35mg/Nm3, flue dust < 10mg/Nm3) while, some areas propose the requirement of improvement " big white cigarette ", and reason is to fire
Coal-fired plant's minimum discharge transformation mostly uses limestone-gypsum wet flue gas desulfurization technology, still contains in desulfurization outlet wet flue gas
A large amount of mist steam, is discharged through chimney in a gaseous form, after premenstruum (premenstrua) gypsum rain is administered, though these steams containing sour water will not
Nearby fallen in the form of drop (gypsum) rain, but with the steam (condensed water pH commonly reaches 2 ~ 3) compared with highly acidity, the inside
Containing condensable particulate matter, certain pollution is still generated to atmosphere, and the visual effect of white plume can also cause the public
Misread.
The general method for solving plume generation is mainly set about in terms of two, is heated first is that passing through, i.e. setting smoke re-heater
(GGH), but it can only solve visual phenomenon, not reduce the discharge of pollutant, while facts have proved GGH energy consumption is high and it is stifled to be easy
Plug is largely removed；Second is that reducing the water in flue gas by condensation, both such method then can solve.
Flue gas condensing while recycling moisture along with the control to discharge pollutants, to such as SO of pollutant in flue gas3, can
The removal of dissolubility salt, Hg is the emphasis of next step power plant environmental protection specification, so if can reasonable disposition system, solving
While " big white cigarette " phenomenon, the recycling and energy-saving and emission-reduction task for completing moisture can also be cooperateed with, can be brought for power plant considerable
Comprehensive benefit.
Summary of the invention
To solve the deficiencies in the prior art, the purpose of the present invention is to provide one kind can reduce discharge, reduces the rings such as water consume
Guarantor, the coal-fired plant flue gas dehumidifying emission-reducing system of economic benefit and technique.
In order to achieve the above objectives, the present invention adopts the following technical scheme that:
A kind of coal-fired plant flue gas dehumidifying emission-reducing system, including filled along the sequentially connected high-efficiency electric dust catcher of pipeline, wet desulphurization
It sets and dehumidifies emission reduction device, dehumidifying emission reduction device includes cylindrical housings, and enclosure interior is provided with pipe heat exchanger, wiper mechanism
With the first demister, wiper mechanism includes sparge pipe and water distributor, and the inner wall two sides of shell are provided with endless glide, sparge pipe
Both ends pass through endless glide sliding block and be slidably connected in endless glide, to drive the movement of sparge pipe, water distributor fixation is set
It is placed on the roof of enclosure interior, and is connected with the water inlet of case top, water distributor is connected to by hose with sparge pipe, is removed
The condensation-water drain of wet emission reduction device bottom collects the import of water tank by piping connection, and the outlet for collecting water tank is connected by pipeline
Logical wet desulphurization device.
Preferably, aforementioned sparge pipe is provided with several water sprays being spacedly distributed on the side of pipe heat exchanger
Hole, it is ensured that ejected wash water uniformity in entire heat-exchanging tube bundle.
More preferably, the length of aforementioned sparge pipe is identical as the length of heat exchanger tube in pipe heat exchanger, can be more effective
Cleaning.
It is highly preferred that being provided with glass flake erosion resistant coating inside aforementioned dehumidifying emission reduction device.
It is further preferred that aforementioned wet desulphurization device is internally provided with the second demister.
Specifically, it is aforementioned dehumidifying emission reduction device and collect water tank connecting line on and collect water tank and wet desulphurization dress
Water pump is provided on the connecting line set, the condensed water in the emission reduction device that dehumidifies, which is pumped to through water, to be collected in water tank, as
The flushing water of wet desulphurization device uses, to realize the recycling of water.
Preferably, aforementioned dehumidifying emission reduction device uses vertical disposition, and the outer framework of pipe heat exchanger is carbon steel, tubular type
The material of heat exchanger tube uses high-termal conductivity corrosion-resistant heat exchange tube in heat exchanger, and backing material uses 2205 two phase stainless steels.
More preferably, the water inlet of aforementioned case top passes through pipe by piping connection filtered water tank, the outlet of sewer of bottom
Road connects dirty water collecting tank.
A kind of coal-fired plant flue gas dehumidifying emission-reducing process, comprising the following steps: flue gas leads to after high-efficiency dust remover dedusting
It crosses flue and enters and carry out desulfurization process in wet desulphurization device, subsequently into dehumidifying emission reduction device deep purifying, wherein dehumidifying subtracts
Condensation phase transformation occurs for pipe heat exchanger in arranging device, and solubility salt, fine particle etc. are caught while large quantity of moisture is precipitated
Collection removing is intercepted using the depth of level-one demister, and flue gas finally enters smoke stack emission to atmospheric environment by flue.
The invention has the beneficial effects that:
(1) by the emission reduction device that dehumidifies the vapor initial partial pressure power in flue gas can be made to be remarkably decreased, vapor is in an atmosphere
The process that partial pressure drops to re-evaporation point will significantly shorten, white plume can be improved significantly；
(2) the remaining SO after desulfurization in neat stress2/SO3It meets water meeting vigorous reaction and is dissolved in water, it can be achieved that most of removing；
(3) waste water that collection is condensed in dehumidifying emission reduction device can be used for the flushing water of mist separator of desulfurization, realize water-saving benefit；
(4) it is further reduced the discharge of flue dust and multiple pollutant, the process of simultaneously coalescence is precipitated constantly from flue gas in condensed water
In, as the collection of condensed water is removed, cooperation efficient electric removes the multiple pollutants such as particulate matter and soluble-salt in flue gas
Dirt device and wet desulphurization device, it can be achieved that flue dust minimum discharge, can not have to install wet electrical dust precipitator additional, economy is obvious；
(5) discharge can be reduced, reduce the environmental protection, economic benefit such as water consume, while can effectively reduce flue dust, SO2Etc. a variety of pollutions
Object improves the reliability and stability of the pollutant discharge in compliance with the standard such as flue dust, plays good environmental benefit and social benefit.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is the structural schematic diagram of dehumidifying emission reduction device in the present invention；
Fig. 3 is the structural schematic diagram of pipe heat exchanger in the present invention.
The meaning of appended drawing reference in figure: 1, high-efficiency electric dust catcher, 2, wet desulphurization device, 3, dehumidifying emission reduction device, 3.1,
Shell, 3.2, sparge pipe, 3.3, endless glide sliding block, 4, pipe heat exchanger, the 5, first demister, 6, collection water tank, 7, water pump,
8, heat exchanger tube, the 9, second demister, 11, backing material.
Specific embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1,2 and 3, one of present invention coal-fired plant flue gas dehumidifying emission-reducing system, including successively connect along pipeline
High-efficiency electric dust catcher 1, wet desulphurization device 2 and the dehumidifying emission reduction device 3 connect, high-efficiency electric dust catcher 1 is using low temperature, pulse electricity
The synergistic manners such as source guarantee flue dust exit concentration < 10mg/Nm3,Desulfuration absorbing tower is using synergy sides such as Two-way Cycle, increase demisters
Formula guarantees SO2Exit concentration < 35mg/Nm3。
The emission reduction device 3 that dehumidifies includes cylindrical housings 3.1, and shell 3.1 is internally provided with pipe heat exchanger 4, wiper mechanism
With the first demister 5, for the installation convenient for pipe heat exchanger 4 and maintenance in the future, dehumidifying emission reduction device 3 is set using modularization
Meter, 5 ~ 10 groups of modules of horizontal direction parallel connection, vertical aspect 3 ~ 5 groups of modules in parallel, 1 ~ 3 unit of every group of module.Dehumidify emission reduction dress
3 inside and the parts of smoke contacts are set, carries out preservative treatment, 3.1 weld of shell should seal, rain-proof, and shell 3.1 designs as far as possible
Avoid dead angle or dirt accumulation area, and internal not ponding.
Dehumidify 3 whole cross section smokeless short circuit phenomenon of emission reduction device, and the structure type that tube bank is gone out using end inlet side not only may be used
To realize that flue gas condensing bleed system is grouped maintenance in outside, while it can also realize that single damage tube bank can carry out external envelope
It is stifled.The emission reduction device 3 that dehumidifies uses vertical disposition, and the outer framework of pipe heat exchanger 4 is carbon steel, exchanges heat in pipe heat exchanger 4
The material of pipe uses high-termal conductivity corrosion-resistant heat exchange tube, and backing material uses 2205 two phase stainless steels, and dehumidifying emission reduction device 3 can be used
2.0 ~ 4.0m of spatial depth size.
Heat exchanger tube 8 is high-termal conductivity corrosion-resistant heat exchange tube 8(CAC) in pipe heat exchanger 4, is used inside backing material 11
2205 two phase stainless steels, outside are carbon steel.Heat exchanger tube 8 is rearranged by stagger arrangement or in-line mode, 8 centre distance of adjacent heat exchange tubes
For 20 ~ 35 mm, specification is φ 8 × 0.7 or φ 5 × 0.4 or other close specifications, not only avoids corroding but also guarantees higher heat exchange
Coefficient, pipe heat exchanger 4 have preferable flue gas passability, resistance < 150Pa.
Wiper mechanism includes sparge pipe 3.2 and water distributor, and sparge pipe 3.2 is provided on the side of pipe heat exchanger 4
Several hole for water sprayings being spacedly distributed, it is ensured that ejected wash water uniformity in entire 8 beam of heat exchanger tube.Dehumidify emission reduction device 3
Using high-termal conductivity corrosion-resistant plastic pipe heat exchanger 4, to guarantee good acidproof, alkaline-resisting, corrosion resistant, wear-resisting, good antiscale property and lead
Hot property can be cooled down by circulating pump with open type rivers Natural Water.
The inner wall two sides of shell 3.1 are provided with endless glide, and the both ends of sparge pipe 3.2 pass through endless glide sliding block
3.3 are slidably connected in endless glide, and to drive the movement of sparge pipe 3.2, sparge pipe 3.2 can be done along 3.1 inner wall of shell
Circulatory motion, so as to the heat exchanger tube 8 that can more fully clean in pipe heat exchanger 4.Water distributor is fixedly installed on inside shell 3.1
Roof on, and be connected with the water inlet at the top of shell 3.1, water distributor be connected to by hose with sparge pipe 3.2, is convenient for spraying water
The movement of pipe 3.2.The length of sparge pipe 3.2 is identical as the length of heat exchanger tube 8 in pipe heat exchanger 4, can be more effective it is clear
It washes.
The condensation-water drain of dehumidifying 3 bottom of emission reduction device collects the import of water tank 6 by piping connection, collects water tank 6
Outlet passes through pipeline connection wet desulphurization device 2.Glass flake erosion resistant coating is provided with inside dehumidifying emission reduction device 3.Wet process is de-
Sulphur device 2 is internally provided with the second demister 9, dehumidifying emission reduction device 3 and collects on the connecting line of water tank 6 and collect water tank
6 and wet desulphurization device 2 connecting line on be provided with water pump 7, the condensed water in the emission reduction device 3 that dehumidifies is sent through water pump 7
To collecting in water tank 6, the flushing water as wet desulphurization device 2 is used, to realize the recycling of water.
The water inlet at 3.1 top of shell passes through piping connection sewage by piping connection filtered water tank, the outlet of sewer of bottom
Collecting box.
A kind of coal-fired plant flue gas dehumidifying emission-reducing process, comprising the following steps: flue gas leads to after high-efficiency dust remover dedusting
It crosses flue and enters and carry out desulfurization process in wet desulphurization device 2, subsequently into dehumidifying 3 deep purifying of emission reduction device, wherein dehumidifying
Condensation phase transformation occurs for pipe heat exchanger 4 in emission reduction device 3, solubility salt, fine particle etc. while large quantity of moisture is precipitated
Be captured removing, intercepts using the depth of level-one demister, flue gas finally enters smoke stack emission to atmospheric environment by flue.
The present invention can be such that the vapor initial partial pressure power in flue gas is remarkably decreased by the emission reduction device 3 that dehumidifies, and vapor exists
The process that partial pressure in atmosphere drops to re-evaporation point will significantly shorten, white plume can be improved significantly；It is net after desulfurization
Remaining SO in flue gas2/SO3It meets water meeting vigorous reaction and is dissolved in water, it can be achieved that most of removing；It is condensed in dehumidifying emission reduction device 3
The waste water of collection can be used for the flushing water of mist separator of desulfurization, realize water-saving benefit；It is further reduced flue dust and multiple pollutant
Discharge, during simultaneously coalescence is precipitated in condensed water constantly from flue gas, a variety of dirts such as particulate matter and soluble-salt in flue gas
Object is contaminated as the collection of condensed water is removed, and cooperates high-efficiency electric dust catcher 1 and wet desulphurization device 2, it can be achieved that flue dust surpasses
Low emission can not have to install wet electrical dust precipitator additional, and economy is obvious；Discharge can be reduced, reduce the environmental protection, economic benefit such as water consume,
Flue dust, SO can be effectively reduced simultaneously2Equal multiple pollutants, improve the reliability and stabilization of the pollutant discharge in compliance with the standard such as flue dust
Property, play good environmental benefit and social benefit.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the above embodiments do not limit the invention in any form, all obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.
Claims (9)
- The emission-reducing system 1. a kind of coal-fired plant flue gas dehumidifies, which is characterized in that including along the sequentially connected efficient electric precipitation of pipeline Device, wet desulphurization device and dehumidifying emission reduction device, the dehumidifying emission reduction device includes cylindrical housings, the enclosure interior setting Have pipe heat exchanger, wiper mechanism and the first demister, the wiper mechanism includes sparge pipe and water distributor, the shell it is interior Wall two sides are provided with endless glide, and the both ends of the sparge pipe pass through endless glide sliding block and are slidably connected to endless glide In, to drive the movement of sparge pipe, the water distributor is fixedly installed on the roof of enclosure interior, and the water inlet with case top Mouth is connected, and the water distributor is connected to by hose with sparge pipe, and the condensation-water drain of the dehumidifying emission reduction device bottom passes through Piping connection collects the import of water tank, and the outlet for collecting water tank passes through pipeline connection wet desulphurization device.
- The emission-reducing system 2. a kind of coal-fired plant flue gas according to claim 1 dehumidifies, which is characterized in that the sparge pipe leans on Several hole for water sprayings being spacedly distributed are provided on the side of nearly pipe heat exchanger.
- The emission-reducing system 3. a kind of coal-fired plant flue gas according to claim 1 dehumidifies, which is characterized in that the sparge pipe Length is identical as the length of heat exchanger tube in pipe heat exchanger.
- The emission-reducing system 4. a kind of coal-fired plant flue gas according to claim 1 dehumidifies, which is characterized in that the dehumidifying emission reduction Glass flake erosion resistant coating is provided with inside device.
- The emission-reducing system 5. a kind of coal-fired plant flue gas according to claim 1 dehumidifies, which is characterized in that the wet desulphurization Device is internally provided with the second demister.
- The emission-reducing system 6. a kind of coal-fired plant flue gas according to claim 1 dehumidifies, which is characterized in that the dehumidifying emission reduction It device and collects on the connecting line of water tank and collects and be provided with water pump on the connecting line of water tank and wet desulphurization device.
- The emission-reducing system 7. a kind of coal-fired plant flue gas according to claim 1 dehumidifies, which is characterized in that the dehumidifying emission reduction Device uses vertical disposition, and the outer framework of the pipe heat exchanger is carbon steel, and the material of heat exchanger tube is adopted in pipe heat exchanger With high-termal conductivity corrosion-resistant heat exchange tube, backing material uses 2205 two phase stainless steels.
- The emission-reducing system 8. a kind of coal-fired plant flue gas according to claim 1 dehumidifies, which is characterized in that the case top Water inlet by piping connection filtered water tank, the outlet of sewer of bottom passes through piping connection dirty water collecting tank.
- 9. a kind of coal-fired plant flue gas dehumidifying emission-reducing process described according to claim 1~any one of 8, which is characterized in that The following steps are included: flue gas after high-efficiency dust remover dedusting, is entered by flue and carries out desulfurization process in wet desulphurization device, Subsequently into dehumidifying emission reduction device deep purifying, wherein condensation phase transformation, great Liang Shui occur for pipe heat exchanger in dehumidifying emission reduction device Solubility salt, fine particle etc. are captured removing while analyzing, and intercept using the depth of level-one demister, flue gas Smoke stack emission is finally entered to atmospheric environment by flue.
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| CN201811359065.XA CN109157941A (en) | 2018-11-15 | 2018-11-15 | A kind of coal-fired plant flue gas dehumidifying emission-reducing system and technique |
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| CN201811359065.XA CN109157941A (en) | 2018-11-15 | 2018-11-15 | A kind of coal-fired plant flue gas dehumidifying emission-reducing system and technique |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110368794A (en) * | 2019-07-22 | 2019-10-25 | 浙江宏电环保股份有限公司 | A kind of smoke gas multi-section formula disappears white device |
| CN110404380A (en) * | 2019-07-19 | 2019-11-05 | 浙江菲达环保科技股份有限公司 | A kind of sintering flue gas desulfurization denitration, flue gas disappear white integrated system and method |
| CN111013340A (en) * | 2019-12-20 | 2020-04-17 | 井陉县鸿祥碳素有限公司 | Rapid cooling and whitening system for flue gas treatment |
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| CN110404380A (en) * | 2019-07-19 | 2019-11-05 | 浙江菲达环保科技股份有限公司 | A kind of sintering flue gas desulfurization denitration, flue gas disappear white integrated system and method |
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