CN208097647U - Flue gas pollutant processing system and chimney - Google Patents

Abstract

The utility model relates to Smoke pollutant treatment device fields, in particular to flue gas pollutant processing system and chimney.Flue gas pollutant processing system includes chimney and the humidifying device for being humidified to the flue gas for entering chimney, chimney has for carrying out cooling heat dissipation wall to chimney emission in-channel water steam with outside air heat exchange, 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 in drop by drop absorption, 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 chimney

Technical field

The utility model relates to Smoke pollutant treatment device fields, in particular to flue gas pollutant processing system and cigarette Chimney.

Background technique

Stationary source exhaust is mainly industrial smoke, has generally included dust, pernicious gas, acid solution or lye 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 atmosphere, 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 generallys use Wet Limestone Desulfurization technique, for removing cigarette Oxygen sulfur compound in gas, and the dust of a part, the works such as coal-burning power plant, Industrial Boiler, stove, petrochemical industry, sulfuric acid can be removed Industry also uses 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 90% or more, typically up to less than 100% saturation.Exist containing wet flue gas In flue and chimney, on the one hand there is the temperature difference inside and outside flue and chimney, temperature difference heat exchange causes flue-gas temperature to drop Low, on the other hand, chimney internal diameter gradually becomes smaller from low to high, and flue gas flow rate is accelerated, and leads to adiabatic expansion, water vapour can be with dust Process is coagulated 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 in chimney outlet to the cold, 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 and directly pollutes the environment after smoke stack emission to atmosphere.

Utility model content

The purpose of the utility model is to provide a kind of flue gas pollutant processing systems, to enhance chimney heat exchange, improve chimney Interior water vapour 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；In addition, this The purpose of utility model, which also resides in, provides a kind of chimney.

To achieve the above object, the technical solution of the flue gas pollutant processing system of the utility model is：

Scheme 1, flue gas pollutant processing system include chimney and for enter chimney flue gas be humidified humidifying device, Chimney has for carrying out cooling heat dissipation wall to chimney emission in-channel water steam with outside air heat exchange, the chimney The demister for removing condensing droplet is provided in discharge flue.

Scheme 2, on the basis of scheme 1, the chimney includes inner barrel and outer barrel, and discharge flue is arranged in inner cylinder, interior The barrel of cylinder constitutes the heat dissipation wall, is equipped between inner cylinder and outer cylinder for air circulation with logical to the cooling cooling of flue gas in inner cylinder Road, the bottom of the outer cylinder are equipped with the air inlet being in communication with the outside, and the top of outer cylinder is equipped with the gas outlet being in communication with the outside.One side Face, the pressure difference generated between air inlet and air 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 cylinder, 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 two sides.

On the basis of scheme 3, scheme 2, it is equipped at the air inlet of the outer cylinder for adjusting air mass flow in cooling duct Valve；Or the humidifying device is the adjustable humidifying device of amount of humidification.Adjustable condensation effect.

Scheme 4, on the basis of scheme 1 or scheme 2 or scheme 3, be equipped in the chimney for collecting demister discharge The catheter of liquid.

Scheme 5, on the basis of scheme 1 or scheme 2 or scheme 3, the humidifying device is arranged in be connected to 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 and the concatenated wet process of 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 shell and setting in the intracorporal swirl vane module of shell, shell be equipped with for flue gas enter swirl vane module into 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 side by side at least two, and demisting is arranged in chimney Device mounting rack, vortex-flow and defrosting device are fixed on demister mounting rack.

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.

The technical solution of the chimney of the utility model is：

Scheme 1, chimney include outer cylinder and the inner cylinder with discharge flue, and the barrel of inner cylinder is constituted for hot with outside air Exchange and carry out cooling heat dissipation wall to chimney emission in-channel water steam, be equipped between the inner cylinder and outer cylinder for air circulation with The cooling duct cooling to inner cylinder flue gas, the bottom of the outer cylinder is provided with the air inlet being in communication with the outside, sets at the top of outer cylinder There is the gas outlet being in communication with the outside, the demister mounting structure for installing demister is equipped in discharge flue.

Scheme 2, on the basis of scheme 1, at the air inlet of the outer cylinder be equipped with for adjusting air stream in cooling duct The valve of amount.

The beneficial effects of the utility model are：The flue gas pollutant processing system of the utility model includes chimney and humidification Device, flue gas are humidified by humidifying device, and for the flue gas after humidification under the cooling effect of chimney, the water vapour in flue gas is cold Drop is congealed into, meanwhile, dust, soluble salt, acid mist, pernicious gas in flue gas etc. can be entered in drop by drop absorption, The drop in flue gas is removed by the demister arranged on chimney top, drop is removed and flow to chimney bottom, and then realize more The cooperation-removal of kind pollutant, improves the treatment effect to pollutant, solves current fume treatment effect difference and cause to big The problem of gas pollutes.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the specific embodiment 1 of the flue gas pollutant processing system of the utility model；

Fig. 2 is the schematic diagram of internal structure of the specific embodiment 1 of the flue gas pollutant processing system of the utility model；

Fig. 3 is the schematic layout pattern of the demister of the specific embodiment 1 of the flue gas pollutant processing system of the utility model；

Fig. 4 is that multiple demisters shown in Fig. 3 are arranged in juxtaposition in the top view in chimney circle discharge flue；

Fig. 5 is the structural schematic diagram of the swirl vane module in Fig. 3；

Fig. 6 is the structural schematic diagram of the specific embodiment 2 of the flue gas pollutant processing system of the utility model；

Fig. 7 is the structural schematic diagram of the specific embodiment 3 of the flue gas pollutant processing system of the utility model；

Fig. 8 is the structural schematic diagram of the specific embodiment 4 of the flue gas pollutant processing system of the utility model；

In figure：Flue 1；Chimney 2；Inner cylinder 21；Outer cylinder 22；Air inlet 221；Gas outlet 222；Cooling duct 23；It removes Day with fog 3；Shell 31；Swirl vane module 32；Swirl vane 321；Blind plate 322；Outlet 33；Inlet tube 34；Collecting tray 35；It receives Collector tube 36；Catheter 37；Flinger ring 38；Pollutant handling arrangement 4；Humidifying device 5；Demister mounting rack 6；Insulate plate 61； Condensation water recovery pond 7；Wet desulphurization device 200；Demisting component 201；Atomizing layer 202；Pollutant handling arrangement 301；Chimney 302；Demister 304；Atomizing layer 303；Cooler 401.

Specific embodiment

The embodiments of the present invention is described further with reference to the accompanying drawing.

The specific embodiment 1 of the flue gas pollutant processing system of the utility model, as shown in Figures 1 to 5, flue gas pollutant Processing system includes flue 1 and the chimney being connected to flue 12, is equipped with demister 3 in the discharge flue of chimney 2, this In embodiment, the top of chimney 2 is arranged in demister 3.Flue gas pollutant processing system further includes for handling flue gas Pollutant handling arrangement 4 and the humidification for being humidified to the flue gas for entering chimney 2 is filled in the rear side of pollutant handling arrangement 4 Set 5.

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 arranged 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 for spraying into and being lower than flue-gas temperature are connect, improves the saturation journey of flue gas by improving water content, reduction flue-gas temperature Degree, flue gas enter in chimney 2 after being humidified by sprayer.In the present embodiment the atomized liquid of humidification can be liquid water, can To be the solution comprising pollutant medicament in removing flue gas.Medicament can be the sodium base desulfurizer such as sodium carbonate, sodium hydroxide, may be used also To be the oxidant enhanced for pollutant progress oxidation removal in flue gas, such as hydrogen peroxide, sodium hypochlorite.

The degree of saturation that flue gas is improved by humidifying device 5 makes the water vapour in flue gas reach the even supersaturated shape of saturation State, in the case that atomizing spray drop amount is bigger, temperature is 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, it can directly promote the water vapour in flue gas 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 is trapped the drop of the greater particle size in flue gas, after collection liquid is accumulated, is dredged to 2 bottom of chimney by demister 3 And it is processed, 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 The effect of releasing is more obvious, and condensation water declines the corrosiveness of 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, it improves systematic collaboration and removes multi-pollutant 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, and it is swollen to improve insulation Swollen lowering ability generates condensate liquids more as far as possible；The demisting efficiency of demister 3 is improved, so that it is more 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 Water vapour carries out cooling heat dissipation wall in chimney discharge flue, and chimney 2 includes inner cylinder 21 and outer cylinder 22, and the barrel of inner cylinder constitutes chimney Heat dissipation wall, cooling duct 23 is formed between inner cylinder 21 and outer cylinder 22, flue 1 is connected to inner cylinder 21, and discharge flue is set It sets in inner cylinder 21.The bottom of outer cylinder 22 is equipped with air inlet 221, and the top of outer cylinder 22 is provided with gas outlet 222, outer cylinder 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 cylinder 22 and inner cylinder 21 from air inlet 221 It in channel 23, goes out from gas outlet 222, is improved by the flowing of air using 2 effect of chimney in channel between inner cylinder, outer cylinder To the condensation effect of flue gas in chimney 2, the area of air inlet 221 and gas outlet 222 is big as far as possible, the air drag of cooling duct 23 It should be as small as possible.Meanwhile the hot fume in inner cylinder 21, to the air heat release between inner cylinder, outer cylinder, it is swollen to form heat for air heats expansion Swollen lift pushes the air flows upwards between inner cylinder, outer cylinder, forms the gravity-flow ventilation between inner cylinder, outer cylinder, strengthens to inner cylinder 21 In flue gas cooling effect.Cold air enters the cooling duct between inner cylinder, outer cylinder from the air inlet 221 that 22 bottom of outer cylinder 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 that flue gas is 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 the figure）, such as air quantity controllable register, Adjustable heat transfer effect can reduce ventilation quantity such as in the case where winter conditions temperature is very low, 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 reduction and rises.Other embodiments In, humidifying device is the adjustable humidifying device of amount of humidification, such as can be using the sprayer of adjustable amount of water sprayed in the prior art.

For example, certain 2 × 1,000,000 kilowatts of generating set setting has the chimney 2 of inner cylinder 21 and outer cylinder 22, wherein outer cylinder 22 It is inside arranged in juxtaposition the steel inner cylinder 21 of two liner titanium plates, two inner cylinders 21 connect the water of the desulfurizer outlet of two units respectively Flat raft cigarette channel.Each 9 meters of 21 internal diameter of 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 cylinder 22 be not provided with air inlet 221, go out In the case where port 222, the gap between the inner cylinder of chimney 2, outer cylinder 22 becomes thermal insulation layer, and flue gas must be interior through the inner cylinder 21 of chimney 2 Cylinder, the air between outer cylinder carry out heat exchange with the external world after outer cylinder 22, and exchange capability of heat is poor, is unfavorable for flue-gas temperature reduction. Cooling duct is formed between the inner cylinder of the chimney 2 of the utility model, outer cylinder, the ascending air of larger flow can be carried out with flue gas Effectively heat exchange forms significant cooling effect to flue gas, 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 shell 31 and setting in the intracorporal swirl vane module 32 of shell, and shell 31 is cylindrical shape, is set in the inner cylinder 21 of chimney 2 It is equipped with demister mounting rack 6, demister is equipped with seven, and seven demisters 3 are disposed in parallel on demister mounting rack 6, due to this Demister 3 in embodiment is cylinder, in order to avoid flue gas directly leaks, in the present embodiment, between the shell 31 of demister 3 Gap in setting packing plate 61, by insulate plate 61 plugging action, avoid flue gas from leaking.Demister 3 can use flue gas The high feature of flow velocity 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 embodiments, the demister 3 of actual arrangement is needed according to flue gas flow rate, chimney The many factors such as 2 internal diameters, 3 removal performance of demister determine.

It is additionally provided with the catheter 37 that liquid is discharged for collecting demister 3 in the inner cylinder 21 of chimney 2, seven in the present embodiment A demister 3 shares the same catheter 37, and catheter 37 is connected to the discharge outlet of seven demisters 3 respectively, and demister 3 is discharged Water by catheter 37 be discharged.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 shell 31 of demister 3 at the gas outlet of the flue gas outflow after processing for being provided with out Mouthful pipe 33, the bottom of shell 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, becomes swirling eddy, carries secretly in air-flow when passing through 321 gap of spiral-plate leaf 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 shell lower end and inlet tube 34, and by collecting liquid pipe 36, converges into catheter 37, drain into 2 bottom of chimney.Demister 3, outlet 33 and shell upper end is discharged through the outlet 33 on top in air-flow after isolating drop 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 in 2 exit of chimney for being located at high-altitude Corrosion material.In order to improve the defogging effect of demister 3, demister in the present embodiment can using 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 The pollutant of the pollutants such as the soluble salt that the dust particle of diameter, fine droplet carry, these low concentration pollutants routine is de- Except method is difficult to effectively remove, and using condensation phase transformation agglomeration process to carry out removing is a kind of relatively effective method.It is common cold Condensed-phase becomes the heat exchanger that method of agglomeration needs a large amount of cold sources, heat exchange capacity big and cools down to 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 utility model is condensation phase transformation method of agglomeration removing pollutant, and its object is to generate to the greatest extent in chimney The more condensing droplet of amount realizes that the joint removing of multi-pollutant, and conventional reduce to the greatest extent generate condensation in chimney and exhaust gases passes The method of drop 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 It using the material of high thermal conductivity, such as uses steel plate, do external thermal insulation measure, utilize exhaust gases passes, chimney wall and the external world empty Carried out between gas heat exchange type at natural heat exchanger, without additional setting heat exchanger；Demister in chimney upper channel can Drop containing pollutant is effectively removed.

The specific embodiment 2 of the flue gas pollutant processing system of the utility model, the present embodiment and above-mentioned specific embodiment 1 Difference be only that：As shown in fig. 6, humidifying device 204 is arranged at the top of wet desulphurization device 200, humidifying device 204 includes three Grade demisting component 201 and the double atomization layer 202 that is arranged between three-level demisting component 201, and atomizing layer 202 is high by compressed air Pressure atomization or direct voltage atomizing type, atomization spray into drop, and atomizing particle size can accomplish 10-40 μm.The spray of first order atomizing layer Enter the sodium base alkalinity desulfurizing agent solution containing low concentration, cigarette can be removed in depth while realizing flue gas humidification in desulfurizing agent such as sodium carbonate Sulfur dioxide, the sulfur trioxide sulfuric acid mist of low concentration in gas.Second level atomizing layer sprays into liquid water, further increases humidification effect Fruit.In other embodiments, it can also only arrange level-one atomizing layer, spray into solution or water containing desulfurizing agent.

It in other embodiments, can also be used using wet desulphurization device as humidifying device, but it must be ensured that wet process is de- 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 Leaching removes the pollutants such as the sulfur dioxide in flue gas.Atomized liquid temperature is lower 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, liquid of desulfurization slurry while cooled flue gas, 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 saturated shape close to water vapour is reached 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 utility model, the present embodiment and above-mentioned specific embodiment 1 Difference be only that：As shown in fig. 7, after pollutant handling arrangement 301, in 302 bottom of chimney, the top cloth of smoke inlet Atomizing layer 303 is set, atomized drop is sprayed into, improves the degree of saturation of water vapour in flue gas.Atomized drop can be pollution containing removing The solution of object medicament, is also possible to liquid water.The atomized drop of 302 bottom collection of chimney, can be with 302 top demister of chimney 304 drops collected are emitted into together in condensation water recovery pond.

The specific embodiment 4 of the flue gas pollutant processing system of the utility model, the present embodiment and above-mentioned specific embodiment 1 Difference be only that：Flue-gas temperature is reduced by gas cooler, the degree of saturation of water vapour is improved, as shown in figure 8, this implementation Heat exchange condensing unit is set in the flue 1 after pollutant handling arrangement in example, and heat exchange condensing unit includes to flue gas The cooling cooler 401 of pipeline 1 reduces flue-gas temperature by the condensing mode that exchanges heat, and realizes to the humidification of flue gas, makes water vapour Reach saturation even hypersaturated state.Cooling fluid and the flue gas flow direction of low temperature exchange heat to flue gas on the contrary, into cooler It is cooling, flue-gas temperature is reduced, wet flue gas degree of saturation is improved, meanwhile, the water vapour in flue gas is formed by phase transformation reunion mode Drop, traps the pollutant in flue gas, and condensation drop discharge cooler is simultaneously processed.In other embodiments, in above-described embodiment Atomizing layer can be used in combination with the heat exchange condensing unit in the present embodiment, first in discharge flue through atomizing layer be atomized spray into Drop, then the degree of saturation for further increasing flue gas is condensed by flue gas heat exchange.It exchanges heat cold in the cooler 401 of condensing unit But flow control valve can be set in fluid flow, is adjusted according to environment temperature.When environment temperature is relatively low, system can expire It in the case where sufficient pollutant removing ability, can reduce, or even shut down the cooling fluid flow of cooler 401.

Smoke pollution substance treating method includes the following steps：1）It is humidified to the flue gas with pollutant；2）It will humidification Flue gas afterwards is passed through in chimney, so that the water vapour in flue gas is condensed into drop using the cooling effect of chimney, and then make pollutant It converges in drop；3）Drop is removed by the demister on chimney top and exports the drop containing pollutant, is completed to cigarette The removal of pollutant in gas.Implementing above-mentioned steps can be used processing system described in above-mentioned specific embodiment 1-4.

The specific embodiment of the chimney of the utility model, chimney and above-mentioned flue gas pollutant processing system in the present embodiment Specific embodiment 1-4 any one described in chimney structure it is identical, repeat no more.

In other embodiments, the form of chimney top demister can according to need determination, and folded plate type such as can be used and remove Day with fog, but flue gas flow rate is more than the critical flow velocity of chevron mist eliminator；Also wet electrical dust precipitator can be used as demister.On The demister on chimney is stated also and can be set the position in chimney top on the lower, in order to guarantee defogging effect, demister should be set It sets on the top of chimney.In other embodiments, above-mentioned chimney can also use the chimney of single layer.

Claims (11)

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 for carrying out cooling heat dissipation wall to chimney emission in-channel water steam with outside air heat exchange, 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 includes inner cylinder and outer Cylinder, discharge flue are arranged in inner cylinder, and the barrel of inner cylinder constitutes the heat dissipation wall, are equipped between inner cylinder and outer cylinder for air circulation With the cooling duct cooling to flue gas in inner cylinder, the bottom of the outer cylinder is equipped with the air inlet being in communication with the outside, the top of outer cylinder 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 cylinder 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. flue gas pollutant processing system according to claim 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. flue gas pollutant processing system according to claim 1 or 2 or 3, it is characterised in that：The humidifying device is to set Set the sprayer in the flue being connected to chimney or in chimney bottom discharge flue.

6. flue gas pollutant processing system according to claim 1 or 2 or 3, it is characterised in that：The humidifying device includes With the concatenated wet desulphurization device of chimney.

7. flue gas pollutant processing system according to claim 1 or 2 or 3, it is characterised in that：The demister is eddy flow Plate demister, rotational flow plate defroster include shell and setting in the intracorporal swirl vane module of shell, shell 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 set, demister mounting rack is set in the chimney, vortex-flow and defrosting device is fixed on demister mounting rack.

9. flue gas pollutant processing system according to claim 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：Including outer cylinder and with the inner cylinder of discharge flue, the barrel of inner cylinder constitute for the external world Air heat exchange carries out cooling heat dissipation wall to chimney emission in-channel water steam, is equipped between the inner cylinder and outer cylinder for air Circulation is provided with the air inlet being in communication with the outside with the cooling duct cooling to inner cylinder flue gas, the bottom of the outer cylinder, outer cylinder 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 at the air inlet of the outer cylinder for adjusting cooling The valve of air mass flow in channel.