CN108970369A - A kind of multisection type high-humidity gas fume device for deep cleaning and its purification process - Google Patents

A kind of multisection type high-humidity gas fume device for deep cleaning and its purification process Download PDF

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Publication number
CN108970369A
CN108970369A CN201811171917.2A CN201811171917A CN108970369A CN 108970369 A CN108970369 A CN 108970369A CN 201811171917 A CN201811171917 A CN 201811171917A CN 108970369 A CN108970369 A CN 108970369A
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cooling
sections
section
condensation
tower
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张�荣
程磊
俞钱永
关向军
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Hangzhou Yunze Environmental Technology Co Ltd
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Hangzhou Yunze Environmental Technology Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/26Drying gases or vapours
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/26Drying gases or vapours
    • B01D53/265Drying gases or vapours by refrigeration (condensation)
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/38Removing components of undefined structure
    • B01D53/40Acidic components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80Semi-solid phase processes, i.e. by using slurries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/96Regeneration, reactivation or recycling of reactants
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/04Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/20Halogens or halogen compounds
    • B01D2257/204Inorganic halogen compounds
    • B01D2257/2045Hydrochloric acid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/20Halogens or halogen compounds
    • B01D2257/204Inorganic halogen compounds
    • B01D2257/2047Hydrofluoric acid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/30Sulfur compounds
    • B01D2257/302Sulfur oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/80Water
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

Abstract

The present invention relates to a kind of multisection type high-humidity gas fume device for deep cleaning and its purification processes, including desulfurizing tower, several layers desulfurization spray equipment, one section of cooling hydrops layer, one section of cooling spray equipment, demisting destarch device, two sections of cooling hydrops layers, two sections of cooling spray equipments, dewatering dryer, heat exchangers are disposed in desulfurizing tower from bottom to up, bottom is as slurry pool in desulfurizing tower, it is provided in desulfurizing tower tower wall between desulfurization spray equipment and slurry pool into cigarette channel, desulfurizing tower top or top side are equipped with smoke outlet;The present invention realizes multi-pollutant deep purifying, and reaches near-zero release, and it is horizontal that the collaboration improvement of high-humidity gas fume multi-pollutant greatly improved;The removal of multi-pollutant in flue gas is realized by lesser condensation number in one section of condensation, by substantially cooling down in two sections of condensations, the clean water resources in recovered flue gas reduce condensation water process and enterprise water use cost;It realizes and eliminates high-humidity gas fume white tail cigarette in lower temperature, heat exchange cost is also greatly reduced.

Description

A kind of multisection type high-humidity gas fume device for deep cleaning and its purification process
Technical field
The present invention relates to a kind of chemical industry and environmental technology field, especially a kind of multisection type high-humidity gas fume device for deep cleaning And its purification process.
Background technique
China is the country of a rich coal resources, and worldwide coal yield closely half is from China.National coal in 2016 34.11 hundred million tons of raw coal of yield occupy first, the whole world, and accounting is up to 45.7%.The coal energy basis important as China and Industrial chemicals provides important support for the national economic development and social stability.By endowment of resources, Technological Economy developing water equality Factor restricts, and in following quite long one period, coal will be the important basic energy resource in China.Coal resources in China is main Xinjiang, Inner Mongol, a few water resources shortage province of Shaanxi are concentrated on, the uneven of coal resource distribution, China's coal are limited to The electric serious area of excess capacity and high Water Resources Pressure area high fit.
Most coal-burning power plants use wet desulfurizing process, large quantity of moisture evaporation in sweetening process, vapor in flue gas Volume fraction rises to about 11% by 6%, every kilogram of 80~100g of dry flue gas water capacity in exiting flue gas.The discharge of boiler system tail portion Water vapour and low temperature exhaust heat be coal-burning power plant's water resource and energy consumption important component.By taking 300MW unit as an example, take off It is more than 100t/h that flue gas, which carries moisture, after sulphur.In the various heat losses of boiler system, flue gas loss accounts for 50% of total losses or more, Account for about the 6% of coal-fired low heat valve.The ratio of flue gas after desulfurization sensible heat is down to 25% by 63%, and vapor latent heat is by 37% It is increased to 75%.Most of obvious heat of smoke is converted to vapor latent heat, i.e., flue gas after desulfurization heat is mainly with vapor latent heat Form exists.Meanwhile the high-humidity gas fume after wet desulphurization spreads difficulty beset by troubles, is easy region nearby and is enriched with, it is attached to desulfurizer Near field harmfulness is larger.
It is directed to wet desulphurization tail gas multi-pollutant deep purifying at present, recycle water resource in tail gas and realizes desulfidation tail gas dirt The technology and equipment or blank of dye object near-zero release.
Summary of the invention
The object of the invention is to it is deep to provide a kind of multisection type high-humidity gas fume in order to solve the shortcoming in background technique Spend purification device and its purification process.
In order to achieve the above objectives, the present invention adopts the following technical scheme: a kind of multisection type high-humidity gas fume device for deep cleaning, It is disposed with several layers desulfurization spray equipment, one section of cooling hydrops layer, one section of drop from bottom to up including desulfurizing tower, in desulfurizing tower Warm spray equipment, demisting destarch device, two sections of cooling hydrops layers, two sections of cooling spray equipments, dewatering dryer, heat exchangers, desulfurization Bottom is provided in the desulfurizing tower tower wall between desulfurization spray equipment and slurry pool into cigarette channel, desulfurization as slurry pool in tower Top of tower or top side are equipped with smoke outlet, and water outlet one end of one section of cooling hydrops layer by pipeline and is set to outside desulfurizing tower One section of circulation fluid cooling tower liquid inlet be connected to connection, the liquid outlet of one section of circulation fluid cooling tower is by being serially connected with one section of condensation The circulation line of cooling pump is connected to connection, water outlet one end of two sections of cooling hydrops layers with the water supplying pipe of one section of cooling spray equipment Connection is connected to the liquid inlet for two sections of circulation fluid cooling towers being set to outside desulfurizing tower by pipeline, and two sections of cooling hydrops layers go out Liquid mouth is connected to connection, slurries with the water supplying pipe of two sections of cooling spray equipments by being serially connected with the circulation line of two sections of condensation cooling pumps Pond is connected to connection with the liquid supply pipe of each desulfurization spray equipment by being serially connected with the pipeline of desulfuration recycle pump.
For a kind of optimization of the invention, the one section of cooling spacing of hydrops layer away from top layer desulfurization spray equipment is 0.5m-2m; The one section of cooling spacing of hydrops layer away from one section of cooling spray equipment is 1m-3m
For a kind of optimization of the invention, the spacing of two sections of cooling hydrops layers and two sections of cooling spray equipments is 1m-5m.
A kind of purification process of multisection type high-humidity gas fume device for deep cleaning, includes the following steps: coal-fired flue-gas through dedusting Enter desulfurizing tower by entering cigarette channel after device preliminary dust removal, slurries are absorbed in slurry pool through desulfuration recycle pump and are delivered to desulfurization spray dress Sprinkling is set, thus major part SO in former flue gas2, the sour gas such as HF, HCl and dust particle trapped by spray droplet, high temperature Flue gas exchanges heat with sprayed slurry, and flue gas cool-down is to 50 DEG C -60 DEG C and reaches saturation and forms high-humidity gas fume;High humidity after desulfurization Flue gas, which continues up, flows into one section of cooling spray equipment, carries out reverse contact heat-exchanging, flue gas temperature with low temperature spraying layer slurries Degree drops to 50-55 DEG C, saturated vapor cooling condensation, part vapor and sour gas with slurries droplet, soluble-salt droplet, Ultrafine dust particulate matter is that the nuclei of condensation carry out Caragana seed pests, and the multi-pollutant in flue gas is realized to be migrated from gaseous state to liquid, droplet From small to growing up greatly, the flue gas for completing one section of cooling condensation continues up to be flowed into demisting destarch device to carry out demisting dry volume It is dry, the drop of condensation coalescence is completed in the drop of demisting destarch device surface enrichment Cheng Geng great, falls under gravity into one section of drop Outside warm hydrops layer discharge tower, a part is used as flue gas condensing liquid, another part after entering one section of circulation fluid cooling tower heat exchange cooling It send to slurrying and mist eliminator flushing system, meets wet desulfurization system and routinely use water;The high-humidity gas fume for completing deep purifying enters Two sections of cooling spray equipments continue to exchange heat with the low temperature droplet of two sections of cooling spray equipments, and flue-gas temperature drops to 35-45 DEG C, Vapor in high-humidity gas fume further condenses, and forms a large amount of cleaning condensing water droplets, completes the high-humidity gas fume of two sections of condensations de- Water drying layer is dehydrated, and a large amount of condensing droplets fall under gravity into two sections of cooling products after dehydration and drying layer surface enrichment Liquid layer is discharged outside tower, and a part is used as flue gas condensing liquid, another part conduct after entering two sections of circulation fluid cooling tower heat exchange coolings The new conventional source water of enterprise;Flue gas after completing two sections of condensations and demisting drying enters heat exchanger, is warming up to 55 through heat exchanger heat exchange DEG C -70 DEG C, atmosphere is discharged by smoke outlet, realizes tail gas eliminating white smoke.
For a kind of optimization of the invention, one section of cooling spray equipment, two sections of cooling spray equipments are by atomizer, spray Drench main pipe and connecting pipe composition, the circulating cooling liquid to cool through one section of circulation fluid cooling tower or two sections of circulation fluid cooling towers Connecting pipe by being serially connected with one section of condensation cooling pump or two sections of condensation cooling pumps is sent to spray main pipe, through spray main pipe distribution It is delivered to atomizer, circulating cooling liquid carries out heat exchange cooling with high-humidity gas fume after atomizer sprays, and realizes condensation, coagulates And the standby pressure of atomizer is 0.08MPa-0.20MPa.
Compared with the background technology, the present invention, comprising:
First is that the present invention cools down to flue gas in such a way that circulating cooling liquid directly condenses, by rationally controlling gas-liquid Time of contact and atomizing effect, multi-pollutant realize multi-pollutant depth deep purifying, and reach in condensation process coalescence, increase It is horizontal that the collaboration improvement of high-humidity gas fume multi-pollutant greatly improved in near-zero release;
Second is that the present invention using two sections condensation by the way of, one section condensation in by lesser condensation number realize flue gas in it is more The removal of pollutant guarantees the cleanliness of two sections of condensed waters;By substantially cooling down in two sections of condensations, the cleaning in recovered flue gas Water resource reduces condensation water process and enterprise water use cost, alleviates water resources crisis;
Third is that the present invention is dry by the two sections of deep condensations and demisting of high-humidity gas fume, most of water in flue gas is recovered It utilizes, wet flue gas specific heat declines to a great extent, and under identical temperature rise, flue gas heat exchange amount and heat exchanger area decline to a great extent, and not only realizes In (subzero 15 DEG C) elimination high-humidity gas fume white tail cigarettes of lower temperature, moreover it is possible to heat exchange cost be greatly reduced.
Detailed description of the invention
Fig. 1 is the theory structure schematic diagram of multisection type high-humidity gas fume device for deep cleaning.
Specific embodiment
Embodiment 1: referring to Fig.1.A kind of multisection type high-humidity gas fume device for deep cleaning, including desulfurizing tower 1, it is characterised in that 3, one sections of several layers desulfurization spray equipment, 4, one sections of cooling hydrops layer cooling spray dress is disposed in desulfurizing tower 1 from bottom to up Set 5, demisting destarch device 6, two sections of coolings hydrops layer 7, two sections of cooling spray equipment 8, dewatering dryer 9, heat exchanger 10, desulfurizing tower Bottom is provided in 1 tower wall of desulfurizing tower between desulfurization spray equipment 3 and slurry pool into cigarette channel 15 as slurry pool 16 in 1, 1 top of desulfurizing tower or top side are equipped with smoke outlet 17, and water outlet one end of one section of cooling hydrops layer 4 passes through pipeline and is set to The liquid inlet of one section of circulation fluid cooling tower 11 outside desulfurizing tower 1 is connected to connection, and the liquid outlet of one section of circulation fluid cooling tower 11 passes through The circulation line for being serially connected with one section of condensation cooling pump 12 is connected to connection, two sections of coolings with the water supplying pipe of one section of cooling spray equipment 5 Water outlet one end of hydrops layer 7 is connected to by pipeline with the liquid inlet for two sections of circulation fluid cooling towers 13 being set to outside desulfurizing tower 1 The liquid outlet of connection, two sections of cooling hydrops layers 7 is sprayed by the circulation line and two sections of coolings for being serially connected with two sections of condensation cooling pumps 14 The water supplying pipe of shower device 8 is connected to connection, and slurry pool is by being serially connected with the pipeline and each desulfurization spray equipment 3 of desulfuration recycle pump 2 Liquid supply pipe connection connection.
Desulfurization spray equipment 3: it is made of desulfurization slurry spray main pipe with several spray atomizing nozzles, desulfurization slurry is by desulfurization After circulation is pumped to desulfurization spraying layer, droplet is atomized by desulfurization spraying layer and inversely contacts washing with former flue gas progress, is removed The sour gas such as SO2, HF, HCl in flue gas.
One section of cooling hydrops layer, 4, two sections of cooling hydrops layer 7 are made of the identical U-shaped of several interlamellar spacings or V-shaped groove, are used The condensate liquid of condensation, coalescence is completed in recycling, realizes the layered shaping of condensate liquid and desulfurization slurry.
One section of cooling spray equipment, 5, two sections of cooling spray equipments 8: by cooling spray liquid main pipe and several atomizers Composition, atomizer are evenly arranged on tower section, and condensate liquid is pumped to cooling spraying layer by condensate circulation, right after being atomized High-humidity gas fume carries out cooling condensation.
Demisting destarch device 6: being made of mist eliminator flushing jellyfish pipe and several atomizers, and atomizer can spray for spiral Mouth or solid nozzle, nozzle be evenly arranged on tower section.
Embodiment 2: referring to Fig.1.A kind of purification process of multisection type high-humidity gas fume device for deep cleaning, including walk as follows Rapid: coal-fired flue-gas enters desulfurizing tower 1 by entering cigarette channel 15 after deduster preliminary dust removal, and slurries are absorbed in slurry pool 16 through desulfurization Circulating pump 2 is delivered to the sprinkling of desulfurization spray equipment 3, thus major part SO in former flue gas2, sour gas and the dust such as HF, HCl Grain object is trapped by spray droplet, and high-temperature flue gas exchanges heat with sprayed slurry, and flue gas cool-down is to 50 DEG C -60 DEG C and reaches saturation shape At high-humidity gas fume;High-humidity gas fume after desulfurization, which continues up, flows into one section of cooling spray equipment 5, with low temperature spraying layer slurries Reverse contact heat-exchanging is carried out, flue-gas temperature drops to 45 DEG C -50 DEG C, and saturated vapor cooling condenses, part vapor and sour gas Body carries out Caragana seed pests using slurries droplet, soluble-salt droplet, ultrafine dust particulate matter as the nuclei of condensation, the multi-pollutant in flue gas It realizes and is migrated from gaseous state to liquid, for droplet volume from small to growing up greatly, the flue gas for completing one section of cooling condensation continues up flowing Demisting drying is carried out into demisting destarch device 6, completes liquid of the drop in 6 surface enrichment Cheng Geng great of demisting destarch device of condensation coalescence Drop falls under gravity into one section of cooling hydrops layer 4 and is discharged outside tower, and a part enters one section of heat exchange drop of circulation fluid cooling tower 11 Flue gas condensing liquid is used as after temperature, another part send to slurrying and mist eliminator flushing system, meets wet desulfurization system and routinely use water; The high-humidity gas fume for completing deep purifying enters two sections of cooling spray equipments 8, continues the low temperature droplet with two sections of cooling spray equipments 8 It exchanges heat, the vapor in high-humidity gas fume further condenses, and forms a large amount of cleaning condensing water droplets, completes the high-humidity gas fumes of two sections of condensations It is dehydrated in dehydration and drying layer 9, a large amount of condensing droplets fall under gravity into two sections after dehydrating 9 surface enrichment of layer The hydrops layer 7 that cools down is discharged outside tower, and a part is used as flue gas condensing liquid after entering two sections of heat exchange coolings of circulation fluid cooling tower 13, another Part is used as the new conventional source water of enterprise;Flue gas after completing two sections of condensations and demisting drying enters heat exchanger 10, through heat exchanger 10 Heat exchange is warming up to 55 DEG C -70 DEG C, is discharged into atmosphere by smoke outlet, realizes tail gas eliminating white smoke.
One section of cooling spray equipment, 5, two sections of cooling spray equipments 8 are by atomizer, spray main pipe and connecting pipe group At the circulating cooling liquid to cool through one section of circulation fluid cooling tower 11 or two sections of circulation fluid cooling towers 13 is by being serially connected with one section The connecting pipe of condensation cooling pump 12 or two sections of condensation cooling pumps 14 is sent to spray main pipe, is delivered to atomization through spray main pipe distribution Nozzle, circulating cooling liquid carry out heat exchange cooling with high-humidity gas fume after atomizer sprays, and realize condensation, coalescence, atomization spray The standby pressure of mouth is 0.08MPa-0.20MPa.
Described one section condenses the deep purifying for being mainly used for multi-pollutant in flue gas;Preferably, one section of cooling spray dress The liquid-gas ratio for setting 5 circulation fluids is 0.5-3L/Nm3, spray coverage rate is 200%-400%, gas-liquid contact time 0.1-2s, flue gas Cooling extent is 1-8 DEG C, and the one section of cooling spacing of hydrops layer 4 away from top layer desulfurization spray equipment 3 is 0.5m-2m;One section of cooling product Spacing of the liquid layer 4 away from one section of cooling spray equipment 5 is 1m-3m.
Described two sections condense the cleaning moisture being mainly used in recovered flue gas, reduce condensation cost of water treatment, improve cold Condensate utilization scope;The liquid-gas ratio that two sections of cooling spray equipments follow 8 circulation fluids is 1-5L/Nm3, spraying layer coverage rate is 200%- 400%, gas-liquid contact time 1-3s, flue gas cool-down amplitude are 5-20 DEG C, two sections of cooling hydrops layers 7 and two sections of cooling spray equipments 8 spacing is 1m-5m.
The demister layer includes that mist eliminator flushing layer, demisting destarch layer and dehydration and drying layer, demisting destarch layer are located at Above one section of condensation, for removing the condensing droplet divided by multi-pollutant for the nuclei of condensation, dehydration and drying layer is located on two sections of condensation segments Side, for removing the clean condensing water droplet in flue gas, the dry flue gas for completing condensation.The heat exchanger layer can for metal or Fluoroplastics, heat transferring medium can be steam or hot water, for carrying out heat exchange heating, elimination white cigarette, preferably, heat exchange to flue gas Device is 5-30 DEG C to the increasing extent of temperature of flue gas, realizes subzero 15 DEG C of eliminations white cigarette.
Embodiment 3: certain thermoelectricity unit, 1 300WM units gas desulfurization improvement project use this technique, in inlet flue gas SO2 concentration is 3416mg/m3, and dust concentration is 53mg/m3 in inlet flue gas, and the liquid-gas ratio of one section of cooling spraying layer circulation fluid is 1.5L/Nm3, one section of spraying layer coverage rate are 200%, and gas-liquid contact time 1.2s, one section of flue gas cool-down amplitude is 3.7 DEG C;Two The liquid-gas ratio of Duan Jiangwen spraying layer circulation fluid is 4.0L/Nm3, and two sections of spraying layer coverage rates are 300%, gas-liquid contact time 1.8s, one section of flue gas cool-down amplitude are 16 DEG C, 18 DEG C of temperature rise of heat exchanger layer flue gas.SO2 concentration is 5.7mg/m3 in exiting flue gas, Dust concentration is 0.1mg/m3 in exiting flue gas, recycles water 27.6m3/h, without white cigarette at subzero 15 DEG C.
Embodiment 4: certain steam power plant, 1 135WM units gas desulfurization improvement project use this technique, SO2 in inlet flue gas Concentration is 1839mg/m3, and dust concentration is 30mg/m3 in inlet flue gas, and the liquid-gas ratio of one section of cooling spraying layer circulation fluid is 1.2L/Nm3, one section of spraying layer coverage rate are 250%, and gas-liquid contact time 1.1s, one section of flue gas cool-down amplitude is 3.5 DEG C;Two The liquid-gas ratio of Duan Jiangwen spraying layer circulation fluid is 4.0L/Nm3, and two sections of spraying layer coverage rates are 300%, gas-liquid contact time 1.7s, one section of flue gas cool-down amplitude are 13 DEG C, 16 DEG C of temperature rise of heat exchanger layer flue gas.SO2 concentration is 3.1mg/m3 in exiting flue gas, Dust concentration is 0.5mg/m3 in exiting flue gas, recycles water 5.6m3/h, without white cigarette at subzero 15 DEG C.
It is to be understood that: although the present embodiment contrasts detailed description to the present invention, these explanations, only It is to simple declaration of the invention, rather than limiting the invention, any invention without departing from true spirit is created It makes, each falls within protection scope of the present invention.

Claims (5)

1. a kind of multisection type high-humidity gas fume device for deep cleaning, including desulfurizing tower (1), it is characterised in that in desulfurizing tower (1) under It is supreme to be disposed with several layers desulfurization spray equipment (3), one section of cooling hydrops layer (4), one section of cooling spray equipment (5), remove Mist destarch device (6), two sections of cooling hydrops layers (7), two sections of cooling spray equipments (8), dewatering dryer (9), heat exchanger (10) take off Sulphur tower (1) interior bottom is arranged in desulfurizing tower (1) tower wall between desulfurization spray equipment (3) and slurry pool as slurry pool (16) Have into cigarette channel (15), desulfurizing tower (1) top or top side are equipped with smoke outlet (17), the water outlet of one section of cooling hydrops layer (4) Mouthful one end is connected to connection with the liquid inlet for being set to the one section of circulation fluid cooling tower (11) of desulfurizing tower (1) outside by pipeline, and one section The liquid outlet of circulation fluid cooling tower (11) is sprayed by the circulation line and one section of cooling for being serially connected with one section of condensation cooling pump (12) The water supplying pipe of device (5) is connected to connection, and water outlet one end of two sections of coolings hydrops layer (7) by pipeline and is set to desulfurizing tower (1) liquid inlet of two sections of circulation fluid cooling towers (13) outside is connected to connection, and the liquid outlet of two sections of coolings hydrops layer (7) passes through concatenation There is the circulation line of two sections of condensation cooling pumps (14) to be connected to connection with the water supplying pipe of two sections of cooling spray equipments (8), slurry pool is logical It crosses and is serially connected with the pipeline of desulfuration recycle pump (2) and is connected to connection with the liquid supply pipe of each desulfurization spray equipment (3).
2. multisection type high-humidity gas fume device for deep cleaning according to claim 1, it is characterized in that: one section of cooling hydrops layer (4) spacing away from top layer desulfurization spray equipment (3) is 0.5m-2m;One section of cooling hydrops layer (4) is away from one section of cooling spray equipment (5) spacing is 1m-3m.
3. multisection type high-humidity gas fume device for deep cleaning according to claim 1, it is characterized in that: two sections of cooling hydrops layers (7) spacing away from two sections of cooling spray equipments (8) is 1m-5m.
4. a kind of purification process of multisection type high-humidity gas fume device for deep cleaning, it is characterised in that include the following steps: coal-fired cigarette By entering cigarette channel (15) into desulfurizing tower (1) after deduster preliminary dust removal, the interior slurries that absorb of slurry pool (16) follow gas through desulfurization Ring pump (2) is delivered to desulfurization spray equipment (3) sprinkling, thus major part SO in former flue gas2, sour gas and the dust such as HF, HCl Particulate matter is trapped by spray droplet, and high-temperature flue gas exchanges heat with sprayed slurry, and flue gas cool-down is to 50 DEG C -60 DEG C and reaches saturation Form high-humidity gas fume;High-humidity gas fume after desulfurization, which continues up, flows into one section of cooling spray equipment (5), with low temperature spraying layer Slurries carry out reverse contact heat-exchanging, and flue-gas temperature drops to 50-55 DEG C, and saturated vapor cooling condenses, part vapor and acidity Gas carries out Caragana seed pests using slurries droplet, soluble-salt droplet, ultrafine dust particulate matter as the nuclei of condensation, more pollutions in flue gas Object is realized to be migrated from gaseous state to liquid, and for droplet volume from small to growing up greatly, the flue gas for completing one section of cooling condensation continues up stream The dynamic demisting destarch device (6) that enters carries out demisting drying, and the drop of completion condensation coalescence is in demisting destarch device (6) surface enrichment at more Big drop is fallen under gravity into outside one section of cooling hydrops layer (4) discharge tower, and a part enters one section of circulation fluid cooling tower (11) it is used as flue gas condensing liquid after heat exchange cooling, another part is sent to slurrying and mist eliminator flushing system, meets wet desulphurization system System is conventional to use water;The high-humidity gas fume for completing deep purifying enters two sections of cooling spray equipments (8), continues to fill with two sections of cooling sprays The low temperature droplet heat exchange of (8) is set, flue-gas temperature drops to 35-45 DEG C, and the vapor in high-humidity gas fume further condenses, and is formed big Amount cleaning condensing water droplet, the high-humidity gas fume for completing two sections of condensations are dehydrated in dehydration and drying layer (9), and a large amount of condensing droplets are de- It is fallen under gravity into after water drying layer (9) surface enrichment outside two sections of cooling hydrops layer (7) discharge towers, a part enters two sections It is used as flue gas condensing liquid after circulation fluid cooling tower (13) heat exchange cooling, another part is as the new conventional source water of enterprise;Complete two sections Flue gas after condensation and demisting are dry enters heat exchanger (10), 55 DEG C -70 DEG C is warming up to through heat exchanger (10) heat exchange, by smoke outlet It is discharged into atmosphere, realizes tail gas eliminating white smoke.
5. the purification process of multisection type high-humidity gas fume device for deep cleaning according to claim 4, it is characterized in that: one section of drop Warm spray equipment (5), two sections of cooling spray equipments (8) are made of atomizer, spray main pipe and connecting pipe, follow through one section The circulating cooling liquid that ring liquid cooling tower (11) or two sections of circulation fluid cooling towers (13) cool is by being serially connected with one section of condensation drop The connecting pipe of temperature pump (12) or two sections of condensation cooling pumps (14) is sent to spray main pipe, is delivered to atomization spray through spray main pipe distribution Mouth, circulating cooling liquid carry out heat exchange cooling with high-humidity gas fume after atomizer sprays, and realize condensation, coalescence, atomizer Standby pressure be 0.08MPa-0.20MPa.
CN201811171917.2A 2018-10-09 2018-10-09 A kind of multisection type high-humidity gas fume device for deep cleaning and its purification process Pending CN108970369A (en)

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CN109364730A (en) * 2018-12-17 2019-02-22 新疆天富集团有限责任公司 A kind of full working scope wet desulphurization tail gas receipts water eliminating white smoke system and method
CN110124500A (en) * 2019-05-15 2019-08-16 杭州蕴泽环境科技有限公司 A kind of depth recycles the device and method of water resource in wet flue gas
CN110305699A (en) * 2019-07-03 2019-10-08 山东大学 Coal gas analyses wet dust removal desulfurization chlorine purification upgrading system and method after dry method dust TRT
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
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109364730A (en) * 2018-12-17 2019-02-22 新疆天富集团有限责任公司 A kind of full working scope wet desulphurization tail gas receipts water eliminating white smoke system and method
CN110124500A (en) * 2019-05-15 2019-08-16 杭州蕴泽环境科技有限公司 A kind of depth recycles the device and method of water resource in wet flue gas
CN110124500B (en) * 2019-05-15 2021-08-10 杭州蕴泽环境科技有限公司 Device and method for deeply recycling water resources in wet flue gas
CN110305699A (en) * 2019-07-03 2019-10-08 山东大学 Coal gas analyses wet dust removal desulfurization chlorine purification upgrading system and method after dry method dust TRT
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
CN110368794B (en) * 2019-07-22 2022-04-08 浙江宏电环保股份有限公司 Flue gas multistage formula disappears and whitewashes device
CN112044203A (en) * 2020-10-22 2020-12-08 盐城市科瑞达科技咨询服务有限公司 Industrial environment-friendly dust removal device
CN112755740A (en) * 2021-01-14 2021-05-07 杭州蕴泽环境科技有限公司 Wet desulphurization tail gas evaporation water step recovery system and method

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