CN110124347A - A kind of energy and water saving type flue gas purification device and method - Google Patents

A kind of energy and water saving type flue gas purification device and method Download PDF

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Publication number
CN110124347A
CN110124347A CN201910519215.7A CN201910519215A CN110124347A CN 110124347 A CN110124347 A CN 110124347A CN 201910519215 A CN201910519215 A CN 201910519215A CN 110124347 A CN110124347 A CN 110124347A
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China
Prior art keywords
liquid
flue gas
heat
thermosphere
stock tank
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CN201910519215.7A
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Chinese (zh)
Inventor
刘伟
程常杰
孔伟
杨志国
张�荣
张银海
关向军
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Hangzhou Yunze Environmental Technology Co Ltd
Xinjiang Tianfu Environmental Protection Technology Co Ltd
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Hangzhou Yunze Environmental Technology Co Ltd
Xinjiang Tianfu Environmental Protection Technology Co Ltd
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Priority to CN201910519215.7A priority Critical patent/CN110124347A/en
Publication of CN110124347A publication Critical patent/CN110124347A/en
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    • 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
    • B01D53/002Separation 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
    • 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
    • B01D53/14Separation 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
    • 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
    • B01D53/14Separation 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
    • B01D53/18Absorbing units; Liquid distributors therefor
    • 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
    • B01D53/28Selection of materials for use as drying agents
    • 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
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/56Nitrogen oxides
    • 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
    • B01D53/73After-treatment of removed 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
    • 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
    • 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
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention discloses a kind of energy and water saving type flue gas purification device and method, device includes scrubbing tower, washing pump, condenser pump, condensate liquid clarifying basin and air cooling pipe grid;The heat that washing slurries and high-temperature flue gas are recycled by indirect condensing mode, reduces the water evaporation quantity of washing process;The heat and gaseous state moisture in saturated flue gas are recycled by way of directly spraying condensation, and the heat of recycling is used to be promoted coal-burning boiler burner hearth intake air temperature.Using energy and water saving type flue gas purifying method of the present invention, it can be achieved that flue gas purification device water consumption is greatly reduced in fume afterheat while making full use of, moreover it is possible to reduce the coal consumption of generating set unit generated output.

Description

A kind of energy and water saving type flue gas purification device and method
Technical field
The present invention relates to resource and environment protection field more particularly to a kind of energy and water saving type flue gas purification device and sides Method.
Background technique
China is the country of a rich coal, water shortage, lean gas, and worldwide coal yield closely half is from China, CHINESE COAL in 2016 34.11 hundred million tons of raw coal of carbon yield occupy first, the whole world, and accounting is up to 45.7%.Meanwhile China or coal consumption big country, Coal accounts for leading in energy consumption structure, and coal consumption amount accounts for 70% or more primary energy consumption total amount, and with industry, electric power Based on fire coal, accounting for coal overall consumption ratio is more than 90%, supplemented by civil.A large amount of dust is generated in industry, electric power coal-fired process Particulate matter, SOX、NOX、COX, the pollutants such as HF, HCl discharged with high-temperature tail gas, wasting a large amount of heat simultaneously to environment Also result in serious environmental pollution, it is necessary to which carrying out recycling to the heat of fire coal tail gas reduces thermal loss and to the pollution in flue gas Object carries out governance for reaching standard discharge.
In terms of flue gas waste heat recovery, in thermal power generation unit, boiler efficiency is the important indicator of unit economy operation, And in all kinds of boiler heat loss, heat loss due to exhaust gas account for the total heat loss of boiler more than half.Higher exhaust gas temperature will lead to Boiler efficiency reduces, and unit annual coal consumption rises, and smoke contamination object discharge amount is caused to increase, and influences the economy fortune of unit Capable and pollutant emission index.Result of study shows: exhaust gas temperature is every to rise 30 DEG C, and boiler efficiency reduces by 1%, unit mark coal consumption Rise 3g/ (kWh).
Currently, realizing that the mode of flue gas heat recovery mainly has: the condensation of fume afterheat heating unit heat regenerative system Water heats hot net water, First air, the Secondary Air of heating boiler.Corresponding flue gas waste heat recovery technology has: low-level (stack-gas) economizer skill Art, low-temperature flue gas processing technique, forward type liquid phase medium air preheater and low-level (stack-gas) economizer combination technique, novel utility boiler waste heat Utilize complex optimum technology.It is combined by a variety of flue gas waste heat recovery technology, the exhaust gas temperature design value of active service unit is about 130 DEG C or so, but the problems such as due to coal-fired condition and power plant's operation level, exhaust gas temperature actual value is generally at 150 DEG C or so, flue gas Heat dissipation loses still in higher level.
Therefore, how effectively waste heat in secondary high-temperature flue gas of the exhaust gas temperature less than 150 DEG C to be recycled, is become Current each thermal power generation unit urgent problem to be solved.
In terms of flue gas pollutant improvement, currently, the installation rate of China's coal unit dedusting, desulphurization and denitration device connects Nearly 100%, wherein using wet scrubbing flue gas desulfurization technique more than 90%.Coal-burning boiler wet desulphurization device is in operational process In, high-temperature flue gas is contacted with spray liquid, and moisture flashes to vapor and enters flue gas in cleaning solution, forms high temperature saturation wet flue gas row It puts into surrounding air, while also having discharged large quantity of moisture to surrounding air, by taking 300MW unit as an example, desulphurization system consumes water 120m3/ h, including former flue gas with water divide 71.8m3/ h, desulphurization system moisturizing 40m3/ h, by year runing time be 8000 hours in terms of, Then a 300MW unit year water consumption is 1,000,000 tons.Flue gas 10000Nm is discharged according to burning ton coal3/ t, wet flue gas institute are aqueous Divide 112g/Nm3Estimation, 1 ton of coal of every burning, wet flue gas take away about 1 ton of moisture content, mainly include original aqueous, desulfurization supplement in coal Water.2014-2017 whole nation year consumes hundred million tons of coal 34-37, then flue-gas desulfurizing device is discharged into the moisture content of atmosphere every year Hundred million tons up to more than 30, the steam vapour amount that wet desulfurization system is discharged into environment is much larger than coal-burning power plant's wet desulfurization system Water consumption.
Therefore, how water-saving to wet desulphurization device progress, it is the problem that coal-fired flue-gas pollutant control faces.
Summary of the invention
The present invention provides a kind of energy and water saving type flue gas purification device and method, for the gas cleaning of coal-burning power plant, It realizes and flue gas purification device water consumption is greatly reduced while fume afterheat makes full use of, moreover it is possible to reduce the power generation of generating set unit The coal consumption of power.
Specific technical solution is as follows:
A kind of energy and water saving type flue gas purification device, including scrubbing tower, washing pump, condenser pump, condensate liquid clarifying basin and sky Cold pipe grid;
Washing stock tank is set gradually in the scrubbing tower from the bottom to top, stock tank takes thermosphere, spray takes thermosphere, wash spray Layer, destarch layer receive liquid layer, condensation spraying layer, demisting drying layer;
The stock tank takes thermosphere and spray that the tower wall between thermosphere is taken to be equipped with smoke inlet, and tower top is equipped with exhanst gas outlet;
The wash spray layer is connected to by washing pump the import and export pipeline with washing stock tank;
Stock tank takes thermosphere liquid inlet, spray to take thermosphere liquid inlet, condensation spraying layer liquid inlet each by pipeline and condensation Pump discharge connection;Stock tank takes thermosphere liquid outlet, spray to take thermosphere liquid outlet, receive liquid layer liquid outlet each by pipeline and air cooling pipe The connection of grid liquid inlet;
Air cooling pipe grid liquid outlet is connected to by pipeline with condensate liquid clarifying basin liquid inlet;Condensate liquid clarifying basin liquid outlet passes through Pipeline and condenser pump inlet communication.
Preferably, the air cooling pipe grid are installed on boiler furnace primary air fan air intake vent.
Preferably, stock tank takes thermosphere liquid inlet, spray to take thermosphere liquid inlet, condensation spraying layer liquid inlet respectively connecting line On be equipped with valve, for open and close and adjust condensate liquid uninterrupted.
The invention also discloses the energy and water saving type flue gas purifying method based on the energy and water saving type flue gas purification device, Include the following steps:
(1) by dedusting, except NOXHigh-temperature flue gas afterwards enters scrubbing tower by smoke inlet, takes thermosphere heat removing tube through spray Enter wash spray layer after rectifying and exchanging heat, further exchanges heat with cleaning solution, flue gas cool-down reaches saturation state, while in flue gas Gaseous pollutant is removed;Saturated flue gas enters destarch layer destarch;
The high-temperature wash liquid for completing washing heat exchange falls into washing stock tank;
(2) it completes that the clean saturated flue gas of heat, washing, destarch is taken to enter condensation spraying layer across liquid layer is received, with low temperature cold Solidifying spray liquid continues heat exchange cooling, and saturated flue gas is cooled to hypersaturated state, and a large amount of vapor condensation liquefactions are at liquid in flue gas Condensed water, condensed water fall into receipts liquid layer with condensation spray liquid, are received liquid layer and scrubbing tower is discharged;
The flue gas for completing condensation cooling is discharged after demisting drying layer removes fine drop by exhanst gas outlet;
(3) the high-temperature wash liquid for falling into washing stock tank takes cryogenic liquid in thermosphere heat removing tube quickly to exchange heat with stock tank, high temperature The decline of cleaning solution temperature, while taking the heat removing tube of thermosphere to carry out layering oxidation to stock tank slurries using stock tank;
(4) it completes that the high temperature condensate liquid of heat is taken to take thermosphere liquid outlet, spray to take thermosphere liquid outlet and receive liquid layer through stock tank Liquid mouth is sent by the road to air cooling pipe grid, and under boiler furnace primary air fan air intake vent airflow function, cold ambient air temperature passes through sky Cold pipe grid quickly exchange heat with high temperature condensate liquid, and condensate temperature rapid decrease forms low temperature cold lime set;
The First air for completing heat exchange heating enters burner hearth and coal is completed to burn, and reduces power generation coal consumption;
(5) the low temperature cold lime set for completing condensation cooling enters condensate liquid clarifying basin precipitating by air cooling pipe grid liquid outlet by the road It clarifies, stock tank is pumped to by condensation after removal a small amount of particle object, thermosphere, spray is taken to take thermosphere and condensation spraying layer and high-temperature flue gas Continue to exchange heat, be recycled.
The stock tank takes in thermosphere and takes thermal modules equipped with several stock tanks, and stock tank takes thermal modules to be covered with washing tower section;It is described Spray takes in thermosphere and takes thermal modules equipped with several sprays, and spray takes thermal modules to be covered with washing tower section.
Preferably, it is 0.3m~0.5m that stock tank, which takes the height of thermal modules, and stock tank takes thermal modules to be immersed under washing slurries, Top distance washing stock tank liquid level is 0.5m~0.8m.
Preferably, it is 0.3m~0.7m that spray, which takes the height of thermal modules, bottom end apart from smoke inlet 0.3m~1.5m, Top is 0.5m~2.0m apart from wash spray layer height.
Stock tank takes thermal modules to take hot-die block structure identical with spray, is horizontally arranged in scrubbing tower.
Thermal modules are each taken to be made of two bobbin carriages and several heat removing tubes being connected between two bobbin carriages.
It each takes in thermal modules, one end bobbin carriage is connected to up and down, and other end bobbin carriage is separated into upper and lower two by liquid separatnig plate and does not connect Logical cavity;Upper chamber is admission chamber, is connected to the liquid inlet of thermal modules is taken;Lower cavity is sap cavity, and takes thermal modules Liquid outlet connection.
Preferably, liquid-distributing plate is equipped in the admission chamber vertically, horizontal perforation liquid-distributing plate is offered on each liquid-distributing plate Equal liquid hole.
Equal liquid hole is for the liquid flow field in uniform admission chamber.
Further, the aperture of equal liquid hole is 5mm~20mm, and the percent opening of liquid-distributing plate is 10%~25%.
Preferably, the heat removing tube layering is equally spacedly connected between two bobbin carriages;Further, heat removing tube divides even number Layer, every heat removing tube is disposed below the surface of adjacent two heat removing tube intermediate points, and is positioned above adjacent two and takes heat The underface of pipe intermediate point.
Top half heat removing tube be connected to admission chamber and the other end bobbin carriage, lower half portion heat removing tube be connected to out sap cavity with it is another The bobbin carriage at end.
Low temperature cold lime set by taking thermosphere liquid inlet to enter in admission chamber, after liquid separatnig plate flows by top half heat removing tube into Enter other end bobbin carriage, then enter lower half portion heat removing tube from the lower part of other end bobbin carriage and flow into out sap cavity, most afterwards through taking thermosphere to go out The discharge of liquid mouth.
Stock tank takes low temperature cold lime set and high temperature slurries in thermosphere heat removing tube to exchange heat, and spray takes the low temperature in thermosphere heat removing tube Condensate liquid and high-temperature flue gas exchange heat, while spray takes thermosphere heat removing tube that can also rectify to high-temperature flue gas, and enhancing flue gas is being washed The uniformity for washing flow field in tower greatly improves the utilization rate of wash spray liquid, realizes flue gas high-efficient purification.
The heat removing tube is metal light wall pipe;It is 20mm~50mm, heat removing tube gap that stock tank, which takes heat removing tube diameter in thermal modules, Distance is 30mm~60mm;It is 30mm~80mm that spray, which takes in thermal modules heat removing tube diameter, heat removing tube clearance distance be 50mm~ 100mm。
It condenses and is equipped with several atomizers in spraying layer;Preferably, condensation spraying layer condensate liquid spray liquid-gas ratio is 0.5L/ Nm3~3.0L/Nm3
The air cooling pipe grid include several metal fin pipes;The metal fin liquid in pipe residence time is 10s~50s, gold Belonging to flow rate of liquid in finned tube is 0.5m/s~2.5m/s;Fin surface is long-pending and pipe outer wall surface area ratio is 10~50: 1.
Compared with prior art, the invention has the benefit that
(1) the present invention provides a kind of solutions of high efficiente callback fume afterheat: setting slurries take in washing stock tank Thermosphere recycles the heat in high temperature slurries;In scrubbing tower smoke inlet high-temperature flue gas region, setting spray takes thermosphere, a large amount of to recycle Waste heat in flue gas;It exchanges heat in conjunction with spray, stock tank slurries take heat and high-temperature flue gas to take heat, deep step by step by three-level different temperatures region Degree takes heat, recycles the heat in high-temperature flue gas to greatest extent;
(2) the present invention provides a kind of solutions that generating set coal consumption is reduced using fume afterheat: completion is taken The high temperature condensate liquid of heat is sent to boiler furnace primary air fan air intake vent is installed on, and transfers heat to fans entrance using finned tube Air improves the air themperature for entering coal-fired furnace cavity, reduces the coal consumption amount under generating set unit generated energy;
(3) the present invention provides a kind of solutions for reducing flue gas purification device water consumption: taking thermosphere to drop by stock tank Low cleaning solution temperature takes thermosphere to reduce flue-gas temperature by spray, significantly reduces the water evaporation quantity of flue gas washing process;And Condensation cooling is carried out to purified flue gas using condensation spray washing, simultaneously for liquid water by the steam transforming in saturated flue gas It is recycled, significantly reduces the water consumption of purification device;
(4) the present invention provides a kind of solutions for improving flue gas purification device purification efficiency: using taking in thermal modules Heat removing tube rectifies inlet flue gas, and enhancing flue gas greatly improves wash spray liquid in the uniformity of washing flow field in tower Utilization rate realizes flue gas high-efficient purification.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of energy and water saving type flue gas purification device;
Fig. 2 is the structural schematic diagram for taking thermal modules;
Fig. 3 is the cross section structure schematic diagram of Fig. 2.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawings and examples, it should be pointed out that reality as described below It applies example to be intended to convenient for the understanding of the present invention, and does not play any restriction effect to it.
As shown in Figure 1, energy and water saving type flue gas purification device includes that scrubbing tower 1, washing pump 2, condenser pump 3, condensate liquid are clear Clear pond 4 and air cooling pipe grid 5.
Wash tower bottoms are washing stock tank, are equipped with stock tank in washing stock tank and take thermosphere 1-1, top is successively arranged spray and takes heat Layer 1-2, wash spray layer 1-3, destarch layer 1-4, liquid layer 1-5, condensation spraying layer 1-6, demisting drying layer 1-7 are received.Stock tank takes heat Layer 1-1 and spray take and are provided with smoke inlet in the tower wall between thermosphere 1-2, and tower top is provided with exhanst gas outlet.
Wash spray layer 1-3 is connected to by 2 the import and export pipeline of washing pump with washing stock tank, and washing pump 2 will be for that will wash slurry Liquid is delivered to wash spray layer 1-3, is uniformly sprayed by wash spray layer 1-3, is washed to flue gas.
Stock tank takes thermosphere 1-1 liquid inlet, spray to take thermosphere 1-2 liquid inlet, condensation spraying layer 1-6 liquid inlet each by pipe Road and 3 outlet of condenser pump;Stock tank takes thermosphere 1-1 liquid outlet, spray to take thermosphere 1-2 liquid outlet, receipts liquid layer 1-5 liquid outlet each It is connected to from by pipeline with 5 liquid inlet of air cooling pipe grid;5 liquid outlet of air cooling pipe grid passes through pipeline and 4 liquid inlet of condensate liquid clarifying basin Connection;4 liquid outlet of condensate liquid clarifying basin passes through pipeline and 3 inlet communication of condenser pump.
Stock tank takes thermosphere 1-1 liquid inlet, spray to take thermosphere 1-2 liquid inlet, condensation spraying layer 1-6 liquid inlet respectively connecting tube Road is equipped with valve, for open and close and adjusts condensate liquid uninterrupted.
Stock tank takes thermosphere 1-1 and spray to take and is equipped with several washing tower sections that are covered in thermosphere 1-2 and takes thermal modules.Stock tank Take thermal modules height be 0.3m~0.5m, be immersed in washing slurries in, top apart from stock tank liquid level be 0.5m~ 0.8m;It is 0.3m~0.7m that spray, which takes the height of thermal modules, and bottom end is 0.3m~1.5m apart from gas approach top distance, Top is 0.5m~2.0m apart from wash spray layer height.
As shown in Figures 2 and 3, stock tank takes thermal modules to take the structure of thermal modules identical with spray, the horizontal peace in scrubbing tower Dress, each takes thermal modules to be made of bobbin carriage and heat removing tube, takes thermal modules both ends respectively to set a bobbin carriage, two, both ends bobbin carriage is by several The heat removing tube of layer equidistantly distributed is connected to connection.
The bobbin carriage middle section of thermal modules wherein one end is each taken to be separated into two mutual disconnected chambers by liquid separatnig plate 1-2-3 Body, upper chamber are admission chamber 1-2-1, are connected to connection with the liquid inlet of thermal modules is taken, and lower cavity is sap cavity 1-2-4, with The liquid outlet of thermal modules is taken to be connected to connection.
Middle section is equipped with liquid-distributing plate 1-2-2 vertically in each admission chamber 1-2-1, and each liquid-distributing plate 1-2-2 is provided with several Horizontal direction runs through the equal liquid hole of liquid-distributing plate 1-2-2, for the liquid flow field in uniform admission chamber 1-2-1.The aperture of equal liquid hole is The percent opening of 5mm-20mm, liquid-distributing plate 1-2-2 are 10%-25%.
It takes on the bobbin carriage inboard, upright side plate of thermal modules both ends, be provided with several layers equidistantly distributed and be connected to heat removing tube Liquid pass hole.
Heat removing tube is the perforative metal light wall pipe in internal both ends, and every heat removing tube both ends are corresponding with both ends bobbin carriage respectively to cross liquid It welds and is connected in hole.It is even level and equidistantly distributed that the number of plies, which is arranged, in heat removing tube, and every heat removing tube is located below adjacent two The underface of the adjacent two heat removing tube intermediate points in the surface and top of heat removing tube intermediate point.
The end heat removing tube of liquid separatnig plate 1-2-3 or more is upper heat removing tube 1-2-5, under liquid separatnig plate 1-2-3 heat removing tube below is Heat removing tube 1-2-6, upper and lower heat removing tube liquid reverse flow.
It is 20mm~50mm that stock tank, which takes heat removing tube diameter in thermal modules, and heat removing tube clearance distance is 30mm~60mm;Spray Taking heat removing tube diameter in thermal modules is 30mm~80mm, and heat removing tube clearance distance is 50mm~100mm.
Spraying layer 1-6 is condensed positioned at receiving above liquid layer 1-5, below demisting drying layer 1-7, is equipped with if condensation spray/1-6 is interior Dry nebulization nozzle.Condensing spraying layer condensate liquid spray liquid-gas ratio is 0.5L/Nm3~3.0L/Nm3
Air cooling pipe grid 5 are installed on breeze fan room air inlet of boiler of power plant;Air cooling pipe grid 5 are by liquid inlet, out liquid Mouth and several metal fin pipes in communication form.The metal fin liquid in pipe residence time is 10s~50s, metal fin Liquid in pipe flow velocity is 0.5m/s~2.5m/s, and fin surface is long-pending and pipe outer wall surface area ratio is 10~50: 1.
Realize that the water-saving energy-efficient process flow of gas cleaning process is as follows using above-mentioned apparatus:
It completes dedusting, remove NOXHigh-temperature flue gas afterwards enters scrubbing tower 1 by smoke inlet, successively takes thermosphere 1-2 by spray With wash spray layer 1-3, high-temperature flue gas takes cryogenic liquid in thermosphere 1-3 heat removing tube 1-2-5,1-2-6 quickly to exchange heat with spray, and Enter wash spray layer 1-3 after spray takes thermosphere 1-2 heat removing tube 1-2-5,1-2-6 rectification uniformly.Wash spray liquid is by washing Pump 2 send to wash spray layer 1-3 and further exchanges heat with flue gas is risen, and the partial moisture in cleaning solution is evaporated in heat transfer process, cigarette Gas cooling reaches saturation state, while removing SO in flue gasX, the gaseous pollutants such as HF, HCl.The high temperature for completing washing heat exchange is washed It washs liquid and falls under gravity into stock tank.The saturated flue gas of washing, purifying enters remaining washing in destarch layer 1-4 removal flue gas Liquid drop.It completes that the clean saturated flue gas of heat, washing, destarch is taken to enter condensation spraying layer 1-6 and low temperature cold across liquid layer 1-5 is received Solidifying spray liquid continues heat exchange cooling, and saturated flue gas is cooled to supersaturation, and a large amount of vapor condensation liquefactions are condensed at liquid in flue gas Water, condensed water fall under gravity into condensation spray liquid and receive liquid layer 1-5, are received liquid layer 1-5 and scrubbing tower is discharged.Complete condensation The flue gas of cooling is after demisting drying layer 1-7 removes fine drop by scrubbing tower outlet drain.Fall into the high-temperature wash of stock tank Liquid takes cryogenic liquid in thermosphere 1-1 quickly to exchange heat with stock tank, the decline of stock tank slurry temperature, while taking heat using what stock tank took thermosphere Pipe carries out layering oxidation to stock tank slurries.By the way that spray takes thermosphere 1-3 to cool down flue gas, stock tank takes thermosphere 1-1 to washing Liquid cools down, and flue gas can be greatly reduced in the reaction temperature of washing process and reduce the water evaporation quantity of heat transfer process, reduces The water consumption of gas cleaning process.
Low temperature cold lime set, which is sent by condenser pump 3 respectively by the road to stock tank, takes thermosphere 1-1, spray to take thermosphere 1-2 and condensation spray The liquid inlet of drenching layer 1-6 takes thermosphere 1-1 and spray to take and is equipped with several scrubbing tower 1 horizontal cross-sections of being covered in thermosphere 1-2 in stock tank Take thermal modules.Under the pressure effect of condenser pump 3, low temperature cold lime set is by taking the liquid inlet of thermal modules to enter on liquid separatnig plate 1-2-3 The admission chamber 1-2-1 of side, after liquid-distributing plate 1-2-2 orifice plate flows in admission chamber 1-2-1, condensate liquid is entered upper with identical flow velocity The liquid inlet of heat removing tube 1-2-5 horizontally flows, and exchanges heat with high-temperature flue gas or high-temperature wash liquid, through upper heat removing tube 1-2-5 The condensate liquid of liquid outlet outflow enters liquid by lower heat removing tube 1-2-6 corresponding with upper heat removing tube 1-2-5 liquid outlet after bobbin carriage water conservancy diversion Mouth enters, and along inversely circulating with upper heat removing tube 1-2-5, continues and high-temperature flue gas or the heat exchange of high-temperature wash liquid.Complete the height of heat exchange Warm condensate liquid enters sap cavity 1-2-4 by the liquid outlet of lower heat removing tube 1-2-6, and is taken outside thermal modules liquid outlet discharge tower.? It condenses and is equipped with several atomizers in spraying layer 1-7, low temperature cold lime set is atomized into droplet through atomizer and saturated flue gas exchanges heat Afterwards, it is fallen under gravity into condensing water droplet and receives liquid layer 1-6, and be discharged outside scrubbing tower 1 by receipts liquid layer 1-6.
It is taken thermosphere 1-1, spray to take thermosphere 1-2 by stock tank and is received the high temperature coolant carrying suction of liquid layer 1-6 liquid outlet discharge The heat of receipts is sent by the road to the liquid inlet for being located at boiler primary air fan air inlet air cooling pipe grid 5, is flowed through in air cooling pipe grid 5 When finned tube, cold ambient air temperature passes perpendicularly through the finned tube in air cooling pipe grid 5 under the action of primary air fan import negative pressure, and It quickly exchanges heat with high temperature coolant in pipe.The surrounding air for completing heat exchange heating enters boiler furnace and coal completion burning is anti- It answers, the air themperature due to entering burner hearth increases, and reduces heat required for air preheat, the coal for reducing combustion process disappears Consumption.The low temperature cold lime set of heat exchange cooling is completed in 5 finned tube of air cooling pipe grid, and through air cooling pipe grid liquid outlet to enter condensate liquid clear The liquid inlet in clear pond 4, precipitating removal condensation washing process trapping have lacked fine particle dust, have completed to precipitate clear low temperature cold Lime set is sent respectively to stock tank by condenser pump 3 and takes thermosphere 1-1, spray to take thermosphere 1-2 and condense the liquid inlet of spraying layer 1-6, as Condensate circulation uses.
Technical solution of the present invention and beneficial effect is described in detail in embodiment described above, it should be understood that Above is only a specific embodiment of the present invention, it is not intended to restrict the invention, it is all to be done in spirit of the invention Any modification, supplementary, and equivalent replacement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of energy and water saving type flue gas purification device, which is characterized in that clear including scrubbing tower, washing pump, condenser pump, condensate liquid Clear pond and air cooling pipe grid;
Washing stock tank is set gradually in the scrubbing tower from the bottom to top, stock tank takes thermosphere, spray takes thermosphere, wash spray layer, takes off Pulp layer receives liquid layer, condensation spraying layer, demisting drying layer;
The stock tank takes thermosphere and spray that the tower wall between thermosphere is taken to be equipped with smoke inlet, and tower top is equipped with exhanst gas outlet;
The wash spray layer is connected to by washing pump the import and export pipeline with washing stock tank;
Stock tank takes thermosphere liquid inlet, spray that thermosphere liquid inlet, condensation spraying layer liquid inlet is taken to pump out each by pipeline and condensation Mouth connection;Stock tank takes thermosphere liquid outlet, spray that thermosphere liquid outlet, receipts liquid layer liquid outlet is taken to enter each by pipeline and air cooling pipe grid The connection of liquid mouth;
Air cooling pipe grid liquid outlet is connected to by pipeline with condensate liquid clarifying basin liquid inlet;Condensate liquid clarifying basin liquid outlet passes through pipeline With condenser pump inlet communication.
2. energy and water saving type flue gas purification device according to claim 1, which is characterized in that stock tank takes the height of thermal modules For 0.3m~0.5m, stock tank takes thermal modules to be immersed under washing slurries, top distance washing stock tank liquid level be 0.5m~ 0.8m。
3. energy and water saving type flue gas purification device according to claim 1, which is characterized in that spray takes the height of thermal modules For 0.3m~0.7m, bottom end apart from smoke inlet 0.3m~1.5m, top apart from wash spray layer height be 0.5m~ 2.0m。
4. energy and water saving type flue gas purification device according to claim 1, which is characterized in that stock tank takes thermal modules and spray Take hot-die block structure identical;Each take thermal modules by two bobbin carriages and several heat removing tube groups being connected between two bobbin carriages At.
5. energy and water saving type flue gas purification device according to claim 4, which is characterized in that each take in thermal modules, one End pipe case is connected to up and down, and other end bobbin carriage is separated into two disconnected cavitys up and down by liquid separatnig plate;Upper chamber is admission chamber, It is connected to the liquid inlet of thermal modules is taken;Lower cavity is sap cavity, is connected to the liquid outlet of thermal modules is taken.
6. energy and water saving type flue gas purification device according to claim 5, which is characterized in that set vertically in the admission chamber There is liquid-distributing plate, the equal liquid hole of horizontal perforation liquid-distributing plate is offered on each liquid-distributing plate.
7. energy and water saving type flue gas purification device according to claim 5, which is characterized in that the aperture of equal liquid hole is 5mm ~20mm, the percent opening of liquid-distributing plate are 10%~25%.
8. energy and water saving type flue gas purification device according to claim 4, which is characterized in that the heat removing tube is metal foil Pipe;It is 20mm~50mm that stock tank, which takes heat removing tube diameter in thermal modules, and heat removing tube clearance distance is 30mm~60mm;Spray takes hot-die Heat removing tube diameter is 30mm~80mm in block, and heat removing tube clearance distance is 50mm~100mm.
9. energy and water saving type flue gas purification device according to claim 1, which is characterized in that if the air cooling pipe grid include Dry metal fin pipe;The metal fin liquid in pipe residence time is 10s~50s, and metal fin liquid in pipe flow velocity is 0.5m/s ~2.5m/s;Fin surface is long-pending and pipe outer wall surface area ratio is 10~50: 1.
10. a kind of energy and water saving type flue gas purifying method, which comprises the steps of:
(1) by dedusting, except NOXHigh-temperature flue gas afterwards enters scrubbing tower by smoke inlet, takes the rectification of thermosphere heat removing tube simultaneously through spray Enter wash spray layer after heat exchange, further exchange heat with cleaning solution, flue gas cool-down reaches saturation state, while gaseous state is dirty in flue gas Dye object is removed;Saturated flue gas enters destarch layer destarch;
The high-temperature wash liquid for completing washing heat exchange falls into washing stock tank;
(2) it completes that the clean saturated flue gas of heat, washing, destarch is taken to enter condensation spraying layer across liquid layer is received, is sprayed with cryogenic condensation Leaching liquid continues heat exchange cooling, and saturated flue gas is cooled to hypersaturated state, and a large amount of vapor condensation liquefactions are condensed at liquid in flue gas Water, condensed water fall into receipts liquid layer with condensation spray liquid, are received liquid layer and scrubbing tower is discharged;
The flue gas for completing condensation cooling is discharged after demisting drying layer removes fine drop by exhanst gas outlet;
(3) the high-temperature wash liquid for falling into washing stock tank takes cryogenic liquid in thermosphere heat removing tube quickly to exchange heat with stock tank, high-temperature wash The decline of liquid temperature, while taking the heat removing tube of thermosphere to carry out layering oxidation to stock tank slurries using stock tank;
(4) it completes that the high temperature condensate liquid of heat is taken to take thermosphere liquid outlet, spray to take thermosphere liquid outlet through stock tank and receive liquid layer liquid outlet It is sent by the road to air cooling pipe grid, under boiler furnace primary air fan air intake vent airflow function, cold ambient air temperature passes through air cooling pipe Grid quickly exchange heat with high temperature condensate liquid, and condensate temperature rapid decrease forms low temperature cold lime set;
The First air for completing heat exchange heating enters burner hearth and coal is completed to burn, and reduces power generation coal consumption;
(5) complete condensation cooling low temperature cold lime set by air cooling pipe grid liquid outlet enter by the road condensate liquid clarifying basin precipitating it is clear Clearly, remove a small amount of particle object after by condensation be pumped to stock tank take thermosphere, spray take thermosphere and condensation spraying layer and high-temperature flue gas after Continuous heat exchange, is recycled.
CN201910519215.7A 2019-06-14 2019-06-14 A kind of energy and water saving type flue gas purification device and method Pending CN110124347A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111558294A (en) * 2020-05-27 2020-08-21 杭州蕴泽环境科技有限公司 Wet flue gas purification system and method with energy-saving function
CN111637481A (en) * 2020-05-27 2020-09-08 杭州蕴泽环境科技有限公司 Tail gas purification system and method for recovering flue gas waste heat

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111558294A (en) * 2020-05-27 2020-08-21 杭州蕴泽环境科技有限公司 Wet flue gas purification system and method with energy-saving function
CN111637481A (en) * 2020-05-27 2020-09-08 杭州蕴泽环境科技有限公司 Tail gas purification system and method for recovering flue gas waste heat
CN111558294B (en) * 2020-05-27 2022-04-22 杭州蕴泽环境科技有限公司 Wet flue gas purification system and method with energy-saving function

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