CN108144383A - Flue gas pollutant processing system and processing method, chimney - Google Patents

Flue gas pollutant processing system and processing method, chimney Download PDF

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Publication number
CN108144383A
CN108144383A CN201810142039.5A CN201810142039A CN108144383A CN 108144383 A CN108144383 A CN 108144383A CN 201810142039 A CN201810142039 A CN 201810142039A CN 108144383 A CN108144383 A CN 108144383A
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China
Prior art keywords
chimney
flue gas
inner cylinder
flue
pollutant
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CN201810142039.5A
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Chinese (zh)
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苏跃进
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Individual
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Priority to CN201810142039.5A priority Critical patent/CN108144383A/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
    • 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
    • B01D53/1456Removing acid 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
    • B01D53/14Separation 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
    • B01D53/1456Removing acid components
    • B01D53/1481Removing sulfur dioxide or sulfur trioxide
    • 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • 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
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The present invention relates to Smoke pollutant treatment device fields, more particularly to flue gas pollutant processing system and processing method, chimney.Flue gas pollutant processing system includes chimney and the humidifying device for being humidified to the flue gas for entering chimney, chimney has the heat dissipation wall for being cooled down with outside air heat exchange to chimney emission in-channel water steam, and the demister for removing condensing droplet is provided in the discharge flue of the chimney.Flue gas is humidified by humidifying device, flue gas after humidification is under the cooling effect of chimney, water vapour in flue gas is condensed into drop, simultaneously, the pollutants such as pernicious gas, dust, soluble salt, acid solution in flue gas are entered by drop absorption in drop, the drop in flue gas is removed by the demister arranged on chimney top, it is removed drop and flow to chimney bottom, and then realize the cooperation-removal of multiple pollutant, the treatment effect to pollutant is improved, it is poor to low concentration pollutant removal effect in flue gas at present to solve the problems, such as.

Description

Flue gas pollutant processing system and processing method, chimney
Technical field
The present invention relates to Smoke pollutant treatment device fields, more particularly to flue gas pollutant processing system and processing side Method, chimney.
Background technology
Stationary source exhaust is mainly industrial smoke, and dust, pernicious gas, acid solution or lye have been generally included in industrial smoke Etc. atmosphere pollutions, due to environmental requirement, flue gas pollutant, which has to pass through, to be removed and could discharge after meeting environmental emission standard Into air, wet desulfurizing process is the common methods for being commercially used for removing flue gas pollutant, while being capable of cooperation-removal cigarette The pollutants such as the dust particle in gas, Chinese coal-burning power plant is generally using Wet Limestone Desulfurization technique, for removing cigarette Oxygen sulfur compound in gas, and the works such as the dust of a part, coal-burning power plant, Industrial Boiler, stove, petrochemical industry, sulfuric acid can be removed Industry is also using the wet fuel gas desulfurizing technology of the lye desulfurization such as ammonia process, magnesium processes, sodium method, seawater.
By taking limestone-based process desulfurization as an example, flue gas passes through desulfurizing tower, sprays process by desulfurization slurry, removes the dirt in flue gas Become after contaminating object containing wet flue gas, but flue gas relative humidity reaches more than 90%, typically up to less than 100% saturation.Exist containing wet flue gas In flue and chimney, on the one hand there are inside and outside flue and chimney temperature difference, the temperature difference heat exchange flue-gas temperature is caused to drop Low, on the other hand, chimney internal diameter tapers into from low to high, and flue gas flow rate is accelerated, and leads to adiabatic expansion, water vapour can be with dust Condensation process occurs for the nuclei of condensation, generates a large amount of condensing droplet, water-soluble pernicious gas in flue gas enters condensation water In drop, the condensation drop small part of generation can drop down onto chimney bottom along chimney wall and be recovered processing, largely be directly discharged into big Gas becomes atmosphere pollution, and water vapour can generate more condensation drops to the cold in chimney outlet, in addition formed in chimney Drop generates " white cigarette " in chimney outlet, causes visual pollution.In addition, also carried in flue gas acid drop, soluble salt, The ingredients such as dust, pernicious gas, the dust particle containing substances such as flyash, calcium sulfate can further be sent out in acid drop Raw reaction, generates soluble salt, after smoke stack emission to air, directly pollutes the environment.
Invention content
The object of the present invention is to provide a kind of flue gas pollutant processing system, to enhance chimney heat exchange, improve water in chimney Steam condenses to form drop ability, and it is poor to low concentration pollutant removal effect in flue gas at present to solve the problems, such as;It is in addition, of the invention Purpose also reside in a kind of smoke pollution substance treating method and chimney be provided.
To achieve the above object, the technical solution of flue gas pollutant processing system of the invention is:
Scheme 1, flue gas pollutant processing system include chimney and the humidifying device for being humidified to the flue gas for entering chimney, chimney With the heat dissipation wall for being cooled down with outside air heat exchange to chimney emission in-channel water steam, the smoke evacuation of the chimney The demister for removing condensing droplet is provided in channel.
Scheme 2, on the basis of scheme 1, the chimney include inner cylinder and outer barrel, discharge flue is arranged in inner cylinder, interior The barrel of cylinder forms the heat dissipation wall, is equipped between inner cylinder and outer barrel and is led to for air circulation with the cooling cooled down to flue gas in inner cylinder Road, the bottom of the outer barrel are equipped with the air inlet being in communication with the outside, and the top of outer barrel is equipped with the gas outlet being in communication with the outside.One side Face, the pressure differential generated between air inlet and gas outlet there are height difference can generate stack effect, on the other hand, the hot cigarette of inner cylinder Gas heats the air between inner cylinder and outer barrel, and air thermal expansion generates gas pull out force, generates stack effect, strengthens air to upstream It is dynamic, improve the heat transfer effect of chimney internal cylinder wall both sides.
It is equipped with to adjust air mass flow in cooling duct on the basis of scheme 3, scheme 2, at the air inlet of the outer barrel Valve;Or the humidifying device is the adjustable humidifying device of amount of humidification.Condensation effect can be adjusted.
Scheme 4, on the basis of scheme 1 or scheme 2 or scheme 3, be equipped in the chimney to collect demister discharge The catheter of liquid.
Scheme 5, on the basis of scheme 1 or scheme 2 or scheme 3, the humidifying device is to be arranged on to connect with chimney Sprayer in flue or in chimney bottom discharge flue.
Scheme 6, on the basis of scheme 1 or scheme 2 or scheme 3, the humidifying device includes the wet method connected with chimney Desulfurizer.
Scheme 7, on the basis of scheme 1 or scheme 2 or scheme 3, the demister is rotational flow plate defroster, and spiral board removes Day with fog includes housing and the swirl vane module that is arranged in housing, housing be equipped with for flue gas enter swirl vane module into Gas port and the gas outlet flowed out for the flue gas after processed.
Scheme 8, on the basis of scheme 7, the rotational flow plate defroster is set up in parallel at least two, setting demisting in chimney Device mounting bracket, vortex-flow and defrosting device are fixed on demister mounting bracket.
Scheme 9, on the basis of scheme 1 or scheme 2 or scheme 3, the chimney is made of metal material, and improves chimney Exchange capability of heat.
To achieve the above object, the technical solution of smoke pollution substance treating method of the invention is:
Scheme 1, smoke pollution substance treating method include the following steps:1)Humidification cooling is carried out to the flue gas for carrying pollutant;2) The flue gas after cooling that will be humidified is passed through in chimney, the water vapour in flue gas is made to be condensed into liquid using chimney and extraneous heat exchange Drop, and then pollutant is made to converge in drop;3)Drop is removed and by the liquid containing pollutant by the demister on chimney top Drop export, completes the removal to pollutant in flue gas.
Scheme 2, on the basis of scheme 1, in step 1)In to flue gas humidification cooling after, reach the water vapour in flue gas Saturation or hypersaturated state.
Scheme 3, on the basis of scheme 1 or scheme 2, step 2)In chimney be provided with inner cylinder and outer barrel, discharge flue It is arranged in inner cylinder, the cooling duct for being cooled down to flue gas in inner cylinder, the bottom of the outer barrel is equipped between inner cylinder and outer barrel Equipped with air inlet, the top of outer barrel is equipped with gas outlet.
Scheme 4, on the basis of scheme 3, in step 2)In, by adjusting air mass flow or adjustment in cooling duct The amount of humidification of humidifying device adjusts the condensing liquid quantity generated in chimney.
The technical solution of chimney of the present invention is:
Scheme 1, chimney include outer barrel and the inner cylinder with discharge flue, the barrel of inner cylinder form for outside air heat exchange To the heat dissipation wall that chimney emission in-channel water steam is cooled down, it is equipped between the inner cylinder and outer barrel for air circulation with internal The cooling duct of cylinder flue gas cooling, the bottom of the outer barrel are provided with the air inlet being in communication with the outside, the top of outer barrel be equipped with The gas outlet of external world's connection, the interior demister mounting structure being equipped with for installing demister of discharge flue.
Scheme 2, on the basis of scheme 1, be equipped at the air inlet of the outer barrel for adjusting air stream in cooling duct The valve of amount.
Beneficial effects of the present invention are:The flue gas pollutant processing system of the present invention includes chimney and humidifying device, cigarette Gas is humidified by humidifying device, and for the flue gas after humidification under the cooling effect of chimney, the water vapour in flue gas is condensed into liquid Drop, meanwhile, dust, soluble salt, acid mist, pernicious gas in flue gas etc. can be entered by drop absorption in drop, pass through cigarette Drop in the demister removing flue gas arranged on chimney top, is removed drop and flow to chimney bottom, and then realize a variety of pollutions The cooperation-removal of object improves the treatment effect to pollutant, solves current fume treatment effect difference and causes to atmosphere pollution The problem of.
Description of the drawings
Fig. 1 is the structure diagram of the specific embodiment 1 of the flue gas pollutant processing system of the present invention;
Fig. 2 is the internal structure schematic diagram of the specific embodiment 1 of the flue gas pollutant processing system of the present invention;
Fig. 3 is the schematic layout pattern of the demister of the specific embodiment 1 of the flue gas pollutant processing system of the present invention;
Fig. 4 is that multiple demisters shown in Fig. 3 are arranged in juxtaposition in the vertical view in chimney circle discharge flue;
Fig. 5 is the structure diagram of the swirl vane module in Fig. 3;
Fig. 6 is the structure diagram of the specific embodiment 2 of the flue gas pollutant processing system of the present invention;
Fig. 7 is the structure diagram of the specific embodiment 3 of the flue gas pollutant processing system of the present invention;
Fig. 8 is the structure diagram of the specific embodiment 4 of the flue gas pollutant processing system of the present invention;
In figure:Flue 1;Chimney 2;Inner cylinder 21;Outer barrel 22;Air inlet 221;Gas outlet 222;Cooling duct 23;Demister 3;Housing 31;Swirl vane module 32;Swirl vane 321;Blind plate 322;Outlet 33;Inlet tube 34;Collecting tray 35;Collection liquid Pipe 36;Catheter 37;Flinger ring 38;Pollutant handling arrangement 4;Humidifying device 5;Demister mounting bracket 6;Insulate plate 61;Condensation Liquid recovery pond 7;Wet desulphurization device 200;Demisting component 201;Atomizing layer 202;Pollutant handling arrangement 301;Chimney 302;It removes Day with fog 304;Atomizing layer 303;Cooler 401.
Specific embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
The specific embodiment 1 of the flue gas pollutant processing system of the present invention, as shown in Figures 1 to 5, flue gas pollutant processing System includes flue 1 and the chimney 2 connected with flue 1, and demister 3, this implementation are equipped in the discharge flue of chimney 2 In example, demister 3 is arranged on the top of chimney 2.Flue gas pollutant processing system further includes the dirt for being handled flue gas Dye object processing unit 4 and the humidifying device 5 on rear side of pollutant handling arrangement 4 to being used to be humidified to the flue gas for entering chimney 2.
In the present embodiment, carried out as shown in figure 3, first passing around pollutant handling arrangement 4 containing the flue gas compared with multi-pollutant Processing, after the completion of processing, the flue gas containing pollutant enters chimney 2 after being humidified using humidifying device 5, and humidifying device 5 is set In flue 1, the humidifying device 5 in the present embodiment is the sprayer being arranged in flue 1, by straight into flue gas The water mist or steam sprayed into less than flue-gas temperature is connect, the saturation journey of flue gas is improved by improving water content, reduction flue-gas temperature Degree, flue gas enter after being humidified by sprayer in chimney 2.In the present embodiment the atomized liquid of humidification can be liquid water, can Be comprising removing flue gas in pollutant medicament solution.Medicament can be the sodium base desulfurizer such as sodium carbonate, sodium hydroxide, may be used also To be to enhance the oxidant that oxidation removal is carried out for pollutant in flue gas, such as hydrogen peroxide, sodium hypochlorite.
The degree of saturation of flue gas is improved by humidifying device 5, the water vapour in flue gas is made to reach the even supersaturated shape of saturation State, when atomizing spray drop amount is bigger, temperature is than in the case of relatively low, spray droplet absorbs the heat in flue gas, effectively drops Low flue-gas temperature, and then the water content in flue gas is reduced, the water vapour in flue gas can directly be promoted to condense.In chimney, therewith phase In adjacent exhaust gases passes, the water vapour in flue gas is because of the heat exchange inside and outside chimney wall, cooling caused by the adiabatic expansion of flue gas And condensing droplet is formed, by the phase transformation agglomeration of water, realize convergence of the pollutant in flue gas in drop;In chimney 2 Exit by demister 3, traps the drop of the greater particle size in flue gas, after collection liquid is accumulated, dredges to 2 bottom of chimney And handled, realize the purification to flue gas.
The degree of saturation of water vapour is higher in flue gas, and the temperature of flue gas reduces more in flue 1 and chimney 2, generates Condensation drop amount it is bigger, drop capture pollutant amount it is more;Condense drop amount it is bigger, in drop pollutant it is dilute It releases and acts on more apparent, corrosiveness decline of the condensation water for flue, in the case that the outlet of demister 3 droplet concentration is certain, not The pollutant that captured drop carries is fewer, and the efficiency of system is higher.Therefore, systematic collaboration removing multi-pollutant is improved The key of efficiency is to improve the degree of saturation of flue gas, and improves the exchange capability of heat between chimney 2 and external environment, improves adiabatic swollen Swollen cooling capacity generates condensate liquids more as possible;The demisting efficiency of demister 3 is improved, it is more so as to improve systematic collaboration removing The efficiency of pollutant.
In order to improve the condensation effect to flue gas, in the present embodiment, chimney have for outside air heat exchange to cigarette The heat dissipation wall that water vapour is cooled down in chimney discharge flue, chimney 2 include inner cylinder 21 and outer barrel 22, and the barrel of inner cylinder forms chimney Heat dissipation wall, cooling duct 23 is formed between inner cylinder 21 and outer barrel 22, flue 1 is connected with inner cylinder 21, and discharge flue is set It puts in inner cylinder 21.The bottom of outer barrel 22 is equipped with air inlet 221, and the top of outer barrel 22 is provided with gas outlet 222, outer barrel 22 its Its position keeps closed state, and since chimney top atmospheric pressure is small, bottom atmospheric pressure is high, and top and bottom exist apparent Air pressure difference, has significant stack effect, and air can enter the cooling between outer barrel 22 and inner cylinder 21 from air inlet 221 It in channel 23, goes out from gas outlet 222, by the flowing of air, using 2 effect of chimney of channel between inner cylinder, outer barrel, improves To the condensation effect of flue gas in chimney 2, the area of air inlet 221 and gas outlet 222 is big as possible, the air drag of cooling duct 23 It should be small as possible.Meanwhile it is swollen to form heat for air heat release of the heat smoke in inner cylinder 21 between inner cylinder, outer barrel, air heats expansion Swollen lift pushes the air flows upwards between inner cylinder, outer barrel, forms the gravity-flow ventilation between inner cylinder, outer barrel, strengthens to inner cylinder 21 In flue gas cooling effect.Cold air enters the cooling duct between inner cylinder, outer barrel from the air inlet 221 that 22 bottom of outer barrel opens up In 23, and heat exchange is carried out between the flue gas in inner cylinder 21, reduce the flue-gas temperature in inner cylinder 21, realize flue gas cooling.Other In embodiment, disturbing flow device can be arranged in inner cylinder 21, cooling duct 23, the heat transfer effect between 21 wall of inner cylinder can be improved. The valve for adjusting air mass flow in cooling duct is arranged at air inlet 221(It is not shown in figure), such as air quantity controllable register, Heat transfer effect can be adjusted, such as in the case where winter conditions temperature is very low, ventilation quantity can be reduced, to reduce the cold of water vapour Solidifying amount, avoids flue-gas temperature too low, reduces flue gas resistance in inner cylinder 21 caused by flue-gas temperature reduces and rises.Other embodiment In, humidifying device is the adjustable humidifying device of amount of humidification, for example the sprayer of adjustable water spray in the prior art may be used.
For example, certain 2 × 1,000,000 kilowatts of chimneys 2 of generating set setting with inner cylinder 21 and outer barrel 22, wherein, outer barrel 22 The steel inner cylinder 21 of two liner titanium plates is inside arranged in juxtaposition, two inner cylinders 21 connect the water of the desulfurizer outlet of two units respectively Flat raft cigarette channel.9 meters of 21 internal diameter of each inner cylinder, poor 200 meters to 2 outlet height of chimney of 2 entrance of chimney, each 2 inner cylinder 21 of chimney Surface area be about 6000 square metres, inner cylinder 21 have huge cooling surface area.When outer barrel 22 is not provided with air inlet 221, goes out In the case of gas port 222, the gap between the inner cylinder of chimney 2, outer barrel 22 becomes thermal insulation layer, flue gas must the inner cylinder 21 through chimney 2, it is interior Cylinder, the air between outer barrel carry out heat exchange after outer barrel 22 with the external world, and exchange capability of heat is poor, is unfavorable for flue-gas temperature reduction. Form cooling duct between the inner cylinder of chimney 2 of the present invention, outer barrel, the ascending air of larger flow can carry out effective with flue gas Heat exchange forms flue gas significant cooling-down effect, improves the effect of cooperation-removal pollutant.
In order to improve the defogging effect of demister 3, in the present embodiment, demister 3 selects rotational flow plate defroster, and spiral board removes Day with fog includes housing 31 and the swirl vane module 32 being arranged in housing, and housing 31 is cylindrical shape, is set in the inner cylinder 21 of chimney 2 Demister mounting bracket 6 is equipped with, demister is equipped with seven, and seven demisters 3 are disposed in parallel on demister mounting bracket 6, due to this Demister 3 in embodiment is cylinder, in order to avoid flue gas directly leaks, in the present embodiment, between the housing 31 of demister 3 Gap in setting packing plate 61, by insulating the plugging action of plate 61, flue gas is avoided to leak.Demister 3 can utilize flue gas The characteristics of flow velocity is high realizes efficient drop separation ability, and flue gas flow rate is high, can also use the cyclonic separation mould of relatively large radius Block reduces the module number being arranged in juxtaposition.In other embodiment, the demister 3 of actual arrangement is needed according to flue gas flow rate, chimney 2 internal diameter sizes, demister 3 remove many factors such as performance and determine.
It is additionally provided in the inner cylinder 21 of chimney 2 for collecting the catheter 37 that demister 3 discharges liquid, seven in the present embodiment A demister 3 shares same catheter 37, and discharge outlet of the catheter 37 respectively with seven demisters 3 connects, and demister 3 is discharged Water discharged by catheter 37.The bottom of chimney 2 is provided with condensation water recovery pond 7, and liquid derived from catheter 37 is discharged into solidifying It ties in liquid recovery pond 7.
As shown in figure 3, the top of the housing 31 of demister 3 at the gas outlet of the flue gas outflow after processing for being provided with out Mouth pipe 33, the bottom of housing 31, which enters for flue gas at the air inlet of swirl vane module, is provided with inlet tube 34, inlet tube 34 Periphery is provided with collecting tray 35, and the drop after spiral board effect separation falls into collecting tray 35, after collecting tray 35 collects Into catheter, in the present embodiment, swirl vane unit 32 includes swirl vane 321 and blind among swirl vane 321 Plate 322 after flue gas enters 3 inside of demister, across swirling eddy is become during 321 gap of spiral-plate leaf, is carried secretly in air-flow Drop is projected with certain elevation angle under effect of inertia and is thrown toward inner walls, and separating liquid is flowed to by gravity convergence In the collecting tray 35 formed between housing lower end and inlet tube 34, and pass through and collect liquid pipe 36, converge into catheter 37, drain into 2 bottom of chimney.It isolates outlet 33 of the air-flow after drop through top and discharges demister 3, outlet 33 and housing upper end Between formed flinger ring 38, avoid surface of shell separating liquid occur smoke secondary carry.Since demister 3 is in highly acid, height It is run under wet, high flue gas flow rate environment, therefore position should must use lightweight, corrosion resistant positioned at 2 exit of chimney in high-altitude Corrosion material.In order to improve the defogging effect of demister 3, the demister in the present embodiment may be used application No. is Board-like separator disclosed in 2017104242751 patent application realizes the height of flue dust exit droplet as demister Effect removing.
The pernicious gases such as the sulfur dioxide of low concentration, the acid drop of nominal particle size, small grain are usually contained containing wet flue gas Pollutants, the pollutants of these low concentration pollutants routine such as the soluble salt that the dust particle of diameter, fine droplet carry take off Except method it is difficult to effectively remove, and it is a kind of relatively effective method that condensation phase transformation agglomeration process is used, which to carry out removing,.It is common cold The heat exchanger that condensed-phase becomes method of agglomeration and needs a large amount of low-temperature receivers, heat exchange capacity big cools down flue gas, then removes liquid through demister Drop, heat exchanger are usually placed on the exhaust gases passes of cigarette receiving chimney, and flue gas resistance is big.
The essence of the present invention is condensation phase transformation method of agglomeration removing pollutant, more as possible its object is to be generated in chimney Condensing droplet, the joint removing and conventional reduce to the greatest extent for realizing multi-pollutant generate condensing droplet in chimney and exhaust gases passes Method it is exactly the opposite.It is humidified by humidifying device to flue gas, improves flue gas degree of saturation;Exhaust gases passes wall, chimney wall use The material of high thermal conductivity, such as use steel plate, do not do external thermal insulation measure, using between exhaust gases passes, chimney wall and outside air Carry out heat exchange type into natural heat exchanger, without additional setting heat exchanger;Demister in chimney upper channel can will contain The drop of pollutant effectively removes.
The specific embodiment 2 of the flue gas pollutant processing system of the present invention, the area of the present embodiment and above-mentioned specific embodiment 1 It is not only that:As shown in fig. 6, in 200 top setting humidifying device 204 of wet desulphurization device, humidifying device 204 is removed including three-level Mist component 201 and the double atomization layer 202 being arranged between three-level demisting component 201, atomizing layer 202 pass through compressed air high pressure mist Change or direct voltage atomizing type, atomization spray into drop, atomizing particle size can accomplish 10-40 μm.The penetrating of first order atomizing layer contains The sodium base alkalinity desulfurizing agent solution of low concentration, desulfurizing agent such as sodium carbonate, can be in deep removal flue gas while realizing flue gas humidification Low concentration sulfur dioxide, sulfur trioxide sulfuric acid mist.Second level atomizing layer sprays into liquid water, further improves moisturization effect. In other embodiment, it can also only arrange level-one atomizing layer, spray into solution or water containing desulfurizing agent.
It in other embodiment, can also be used wet desulphurization device as humidifying device, but it must be ensured that wet method takes off Vapour content reaches requirement in the flue gas of sulphur device discharge.Flue gas is sprayed in wet desulphurization device by the atomization of desulfurization slurry It drenches, the pollutants such as sulfur dioxide in removing flue gas.Atomized liquid temperature is less than flue-gas temperature, is conducive to absorb the heat in flue gas Amount, improves the water vapour degree of saturation of flue gas, in work, desulfurization slurry is while cooled flue gas, the liquid in desulfurization slurry Water absorbs the heat in flue gas, and evaporation forms water vapour, and the flue gas of wet desulphurization device outlet is close to reach water vapour saturation shape State.Desulfurization slurry requires supplementation with process water, and to make up the notch of liquid water evaporation formation, the separating liquid that demister 3 removes can be with As supplement process water.
The specific embodiment 3 of the flue gas pollutant processing system of the present invention, the area of the present embodiment and above-mentioned specific embodiment 1 It is not only that:As shown in fig. 7, after pollutant handling arrangement 301, mist is arranged in the top of 302 bottom of chimney, smoke inlet Change layer 303, spray into atomized drop, improve the degree of saturation of water vapour in flue gas.Atomized drop can be the pollutant medicine containing removing The solution or liquid water of agent.The atomized drop of 302 bottom collection of chimney can be received with 302 top demister 304 of chimney The drop of collection is emitted into together in condensation water recovery pond.
The specific embodiment 4 of the flue gas pollutant processing system of the present invention, the area of the present embodiment and above-mentioned specific embodiment 1 It is not only that:Flue-gas temperature is reduced by gas cooler, the degree of saturation of water vapour is improved, as shown in figure 8, in the present embodiment Setting heat exchange condensing unit in flue 1 after pollutant handling arrangement, heat exchange condensing unit are included to flue 1 The cooler 401 of cooling by the condensing mode that exchanges heat, reduces flue-gas temperature, realizes the humidification to flue gas, water vapour is made to reach full With even hypersaturated state.Cooling fluid and the flue gas flow direction of low temperature carry out heat exchange cooling on the contrary, into cooler to flue gas, Flue-gas temperature is reduced, improves wet flue gas degree of saturation, meanwhile, the water vapour in flue gas forms drop by phase transformation reunion mode, The pollutant in flue gas is trapped, condensation drop discharge cooler is simultaneously handled.In other embodiment, the atomization in above-described embodiment Layer can be used in combination with the heat exchange condensing unit in the present embodiment, be first atomized in discharge flue through atomizing layer and spray into drop, The degree of saturation of flue gas is further improved by flue gas heat exchange condensation again.The cooling stream to exchange heat in the cooler 401 of condensing unit Body flow can set flow control valve, be adjusted according to environment temperature.When environment temperature disclosure satisfy that dirt than relatively low, system In the case of contaminating object removing ability, it can reduce or even shut down the cooling fluid flow of cooler 401.
The specific embodiment of the smoke pollution substance treating method of the present invention, the smoke pollution substance treating method in the present embodiment Include the following steps:1)It is humidified to the flue gas for carrying pollutant;2)Flue gas after humidification is passed through in chimney, utilizes chimney Cooling effect the water vapour in flue gas is made to be condensed into drop, and then pollutant is made to converge in drop;3)Pass through chimney top Demister remove drop and by containing pollutant drop export, complete the removal to pollutant in flue gas.Implement above-mentioned step Suddenly the processing system described in above-mentioned specific embodiment 1-4 can be used.
The specific embodiment of the chimney of the present invention, chimney and the tool of above-mentioned flue gas pollutant processing system in the present embodiment The structure of chimney described in body embodiment 1-4 any one is identical, repeats no more.
In other embodiment, the form of chimney top demister can determine as needed, can such as be removed using folded plate type Day with fog, but flue gas flow rate is more than the critical flow velocity of chevron mist eliminator;Wet electrical dust precipitator can also be used as demister.On The position of chimney top on the lower can also be arranged on by stating the demister on chimney, and in order to ensure defogging effect, demister should be set It puts on the top of chimney.In other embodiment, above-mentioned chimney can also use the chimney of individual layer.

Claims (15)

1. flue gas pollutant processing system, it is characterised in that:Humidification including chimney and for being humidified to the flue gas for entering chimney Device, chimney has the heat dissipation wall for being cooled down with outside air heat exchange to chimney emission in-channel water steam, described The demister for removing condensing droplet is provided in the discharge flue of chimney.
2. flue gas pollutant processing system according to claim 1, it is characterised in that:The chimney is including inner cylinder and outside Cylinder, discharge flue are arranged in inner cylinder, and the barrel of inner cylinder forms the heat dissipation wall, is equipped between inner cylinder and outer barrel for air circulation With the cooling duct cooled down to flue gas in inner cylinder, the bottom of the outer barrel is equipped with the air inlet being in communication with the outside, the top of outer barrel Equipped with the gas outlet being in communication with the outside.
3. flue gas pollutant processing system according to claim 2, it is characterised in that:It is equipped at the air inlet of the outer barrel For adjusting the valve of air mass flow in cooling duct;Or the humidifying device is the adjustable humidifying device of amount of humidification.
4. the flue gas pollutant processing system according to claims 1 or 2 or 3, it is characterised in that:It is equipped with and uses in the chimney In the catheter for collecting demister discharge liquid.
5. the flue gas pollutant processing system according to claims 1 or 2 or 3, it is characterised in that:The humidifying device is sets Put the sprayer in the flue connected with chimney or in chimney bottom discharge flue.
6. the flue gas pollutant processing system according to claims 1 or 2 or 3, it is characterised in that:The humidifying device includes The wet desulphurization device connected with chimney.
7. the flue gas pollutant processing system according to claims 1 or 2 or 3, it is characterised in that:The demister is eddy flow Plate demister, rotational flow plate defroster include housing and the swirl vane module that is arranged in housing, housing be equipped with for flue gas into The gas outlet for entering the air inlet of swirl vane module and being flowed out for the flue gas after processed.
8. flue gas pollutant processing system according to claim 7, it is characterised in that:The rotational flow plate defroster is set side by side At least two are put, demister mounting bracket is set in the chimney, vortex-flow and defrosting device is fixed on demister mounting bracket.
9. the flue gas pollutant processing system according to claims 1 or 2 or 3, it is characterised in that:The chimney is by metal material Material is made.
10. chimney, it is characterised in that:Inner cylinder including outer barrel and with discharge flue, the barrel of inner cylinder form for the external world The heat dissipation wall that air heat exchange cools down chimney emission in-channel water steam is equipped between the inner cylinder and outer barrel for air The cooling duct circulated to be cooled down to inner cylinder flue gas, the bottom of the outer barrel are provided with the air inlet being in communication with the outside, outer barrel Top is equipped with the gas outlet being in communication with the outside, and the demister mounting structure for installing demister is equipped in discharge flue.
11. chimney according to claim 10, it is characterised in that:It is equipped with to adjust cooling at the air inlet of the outer barrel The valve of air mass flow in channel.
12. smoke pollution substance treating method, which is characterized in that include the following steps:1)The flue gas for carrying pollutant is increased It is clammy but;2)The flue gas after cooling that will be humidified is passed through in chimney, and the water vapour in flue gas is made using the heat exchange in chimney and the external world Drop is condensed into, and then pollutant is made to converge in drop;3)Drop is removed by the demister on chimney top and dirt will be contained The drop export of object is contaminated, completes the removal to pollutant in flue gas.
13. smoke pollution substance treating method according to claim 12, it is characterised in that:In step 1)In to flue gas be humidified After cooling, the water vapour in flue gas is made to reach saturation or hypersaturated state.
14. smoke pollution substance treating method according to claim 12 or 13, it is characterised in that:Step 2)In chimney set Inner cylinder and outer barrel are equipped with, discharge flue is arranged in inner cylinder, is equipped with to cool down flue gas in inner cylinder between inner cylinder and outer barrel Cooling duct, the bottom of the outer barrel are equipped with air inlet, and the top of outer barrel is equipped with gas outlet.
15. smoke pollution substance treating method according to claim 14, it is characterised in that:In step 2)In, pass through adjusting The amount of humidification of air mass flow or adjustment humidifying device in cooling duct adjusts the condensing liquid quantity generated in chimney.
CN201810142039.5A 2018-02-11 2018-02-11 Flue gas pollutant processing system and processing method, chimney Withdrawn CN108144383A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109030122A (en) * 2018-08-15 2018-12-18 山东国舜建设集团有限公司 Wet flue gas condensation water sampler and method are saturated after a kind of wet desulphurization
CN113217932A (en) * 2021-04-01 2021-08-06 青海湘和有色金属有限责任公司 Boiler waste heat recycling mechanism and using method thereof
CN113318580A (en) * 2021-04-28 2021-08-31 汪兴杰 Spraying and spraying desulfurization reaction tower
CN114682049A (en) * 2020-12-30 2022-07-01 中国石油化工股份有限公司 Phase change SO of flue gas3And dust treatment device and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109030122A (en) * 2018-08-15 2018-12-18 山东国舜建设集团有限公司 Wet flue gas condensation water sampler and method are saturated after a kind of wet desulphurization
CN109030122B (en) * 2018-08-15 2023-12-01 山东国舜建设集团有限公司 Sampling device and method for saturated wet flue gas condensate after wet desulfurization
CN114682049A (en) * 2020-12-30 2022-07-01 中国石油化工股份有限公司 Phase change SO of flue gas3And dust treatment device and method
CN114682049B (en) * 2020-12-30 2023-07-04 中国石油化工股份有限公司 Flue gas phase change SO 3 Dust treatment device and method
CN113217932A (en) * 2021-04-01 2021-08-06 青海湘和有色金属有限责任公司 Boiler waste heat recycling mechanism and using method thereof
CN113318580A (en) * 2021-04-28 2021-08-31 汪兴杰 Spraying and spraying desulfurization reaction tower

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