CN109513330B - Horizontal flue gas purification device and purification method - Google Patents

Horizontal flue gas purification device and purification method Download PDF

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Publication number
CN109513330B
CN109513330B CN201910005123.7A CN201910005123A CN109513330B CN 109513330 B CN109513330 B CN 109513330B CN 201910005123 A CN201910005123 A CN 201910005123A CN 109513330 B CN109513330 B CN 109513330B
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flue gas
treatment
box
solution
adsorption layer
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CN109513330A (en
CN109513330B8 (en
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鲁廷阳
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Shandong Dongzun Huatai Environmental Protection Technology Co ltd
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Shenzhen Lizhan Zhifeng Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Treating Waste Gases (AREA)

Abstract

本发明公开了一种卧式烟气净化装置及净化方法，属于烟气处理技术领域。装置包括：盛放处理剂溶液的溶液箱；以及设置在溶液箱上的处理箱；处理箱上设置有进烟口和排烟口；以及用于将溶液箱内的处理剂溶液扬起形成水花和水雾充满处理箱的水轮装置，其设置在溶液箱上口与处理箱底部之间；处理箱内竖向设置有若干隔板，隔板包括交替设置的上隔板和下隔板，其中：上隔板与处理箱的顶部和两侧密封连接，且与溶液箱内的处理剂溶液液面之间留有烟气通道；下隔板与处理箱的两侧密封连接，且其上端留有烟气通道，下端伸入处理剂溶液液面以下。本发明采用卧式结构，安全性高，能耗和成本低；不存在灰尘堵塞喷嘴问题；烟气与处理剂接触充分，净化效果好。

The present invention discloses a horizontal flue gas purification device and purification method, belonging to the technical field of flue gas treatment. The device comprises: a solution box for containing a treatment agent solution; and a treatment box arranged on the solution box; a smoke inlet and a smoke exhaust port are arranged on the treatment box; and a water wheel device for lifting the treatment agent solution in the solution box to form water splashes and water mist to fill the treatment box, which is arranged between the upper opening of the solution box and the bottom of the treatment box; a plurality of partitions are arranged vertically in the treatment box, and the partitions include upper partitions and lower partitions arranged alternately, wherein: the upper partition is sealed and connected to the top and both sides of the treatment box, and a flue gas channel is left between the liquid level of the treatment agent solution in the solution box; the lower partition is sealed and connected to both sides of the treatment box, and a flue gas channel is left at its upper end, and the lower end extends below the liquid level of the treatment agent solution. The present invention adopts a horizontal structure, with high safety, low energy consumption and cost; there is no problem of dust blocking the nozzle; the flue gas is in full contact with the treatment agent, and the purification effect is good.

Description

Horizontal type flue gas purifying device and purifying method
Technical Field
The invention relates to the technical field of flue gas treatment, in particular to a horizontal type flue gas purifying device and a purifying method.
Background
Research has shown that carbon dioxide emitted during combustion is a major substance causing the greenhouse effect, and that the emitted sulfur dioxide, nitrogen dioxide and fly ash particles are also the major sources of atmospheric pollution. How to eliminate these contaminations is a problem to be solved.
At present, the methods for desulfurizing and denitrating (nitrogen) the flue gas mainly comprise a few methods, namely a1, calcium-based absorbent method, wherein lime powder or lime slurry is sprayed into a flue, reacts with sulfur dioxide to generate sulfate and other particulate matters, and is captured by a dust remover along with the flue gas. 2. The electron beam method includes the steps of irradiating fume with electron beam, absorbing most of the electron beam energy with nitrogen, oxygen and water vapor to produce great amount of active radicals, oxidizing sulfur dioxide and nitrogen dioxide with the active radicals to produce sulfuric acid and nitric acid, and neutralizing the sulfuric acid and nitric acid with ammonia to produce aerosol powder. 3. The catalyst method uses copper oxide, aluminum oxide, zinc oxide and the like to remove sulfur dioxide and nitrogen dioxide.
In recent years, the combined desulfurization and denitrification technology is in the development direction of flue gas treatment, a common desulfurization and denitrification device in the prior art is a vertical treatment tower, flue gas is introduced into the treatment tower to absorb harmful components in the flue gas through a spray absorbent, but the treatment tower has the following defects that 1, the vertical structure is adopted, the installation and maintenance are difficult, the construction safety is poor, 2, the tower height is large, the water supply pressure is overlarge, the energy consumption is high, 3, a nozzle is easy to be blocked by dust in the flue gas, 4, after long-term use, dust in the flue gas is easy to form slurry to be accumulated in the tower, the flue gas treatment effect is influenced, the flue gas is difficult to clean, 5, the flue gas flow is small, and the treatment efficiency is low.
According to the Chinese patent, an authorized bulletin number is CN 106000062B, an authorized bulletin day 2018.08.21, a desulfurization, denitrification, dedusting and demisting integrated tower is disclosed, a cyclone ion cutting device is arranged in a three-dimensional tower, the upper part of the cyclone ion cutting device is a cylindrical cyclone, the lower part of the cyclone ion cutting device is a cylindrical guide cover, vertical strip-shaped guide holes are formed in the guide cover, the guide holes are uniformly distributed along the circumference of the lower part of the guide cover, a circle of grid-shaped meshes are arranged on the outer periphery of the guide cover in a surrounding manner, the positions of the grid-shaped meshes correspond to the positions of the guide holes, the upper end of the cyclone extends upwards to penetrate through the top of the three-dimensional tower to extend out of the three-dimensional tower, a baffle plate is arranged between the cyclone and the three-dimensional tower, a sodium alkali liquor spraying layer and a multistage demister are arranged in the cyclone from bottom to top, the lower part of the cyclone ion cutting device is provided with a conical regeneration groove, the upper end of the cyclone ion cutting device is communicated with the guide cover through a downcomer, and the lower end of the downcomer extends into the guide cover through a support frame to be suspended on the upper part of the regeneration groove. The tower body adopts a vertical structure, has difficult installation and maintenance and poor construction safety, has overlarge water supply pressure and high energy consumption caused by large height of the tower body, has larger equipment input cost and use cost, and is difficult to clean due to the fact that dust in the flue gas easily forms slurry to gather in the tower body after long-term use, and the flue gas treatment effect is affected.
Also, china patent, grant bulletin No. CN 106390706B, grant bulletin No. 2018.10.23, discloses a rain curtain type desulfurization spray tower, which comprises a tank body, a pulse stirring water distribution pipe, an oxidation gas distribution pipe, a partition plate component, a central gas exhaust pipe component, a spiral column plate component, a spray pipe component and a demister. The curtain type desulfurization spray tower adopts a curtain type spray structure to wash coal-fired flue gas, the spray pipe nozzle is not required to atomize limestone slurry, the grinding precision of limestone particles and the pressure of a spray circulating pump outlet can be moderately reduced, the spray pipe nozzle is not easy to be blocked, and the energy consumption of the spray circulating pump is small, so that the running cost of the curtain type desulfurization spray tower is reduced. The oxidation fan is conveyed into the rain curtain type desulfurization spray tower and is used for isolating waste gas after calcium sulfite in limestone slurry is oxidized from coal-fired flue gas, the oxygen content in the coal-fired flue gas at the outlet of the rain curtain type desulfurization spray tower is low, the subsequent denitration process adopting the wet complexation absorption method is not influenced, the process problem of the wet complexation absorption method is solved, and the application of the wet complexation absorption method with low cost is promoted. However, this invention has the same disadvantages as the above-described invention.
Disclosure of Invention
Technical problem to be solved by the invention
The invention provides a horizontal type flue gas purifying device and a purifying method, which aim at the problems that the existing vertical type flue gas treating tower is difficult to install and overhaul, poor in construction safety, overlarge in water supply pressure, high in energy consumption and high in equipment investment cost and use cost, and the horizontal type flue gas purifying device and the purifying method are used for lifting a treating agent solution to form water spray and water mist by utilizing a water wheel device, so that the treating agent solution and flue gas are fully mixed and reacted, the effect of absorbing and purifying pollutants in the flue gas is optimized, the horizontal type flue gas purifying device is easy to install and overhaul, high in construction safety, free of high-pressure water supply, low in energy consumption, greatly reduced in equipment investment cost and use cost, free of a nozzle structure, free of dust blocking nozzle, and capable of enabling the flue gas to flow through the treating box along an S-shaped route by arranging a partition plate in the treating box, thereby increasing the stroke of the flue gas in the treating box, fully mixing and reacting the treating agent solution and the flue gas, and optimizing the effect of absorbing and purifying pollutants in the flue gas.
Technical proposal
In order to solve the problems, the technical scheme provided by the invention is as follows:
A horizontal type flue gas purifying device comprises a solution tank and a treatment tank, wherein the treatment tank is used for containing a treating agent solution, the treatment tank is arranged at the upper end of the solution tank, the bottom of the treatment tank is open and is communicated with the solution tank up and down, a flue gas inlet and a flue gas outlet are formed in the treatment tank, the flue gas inlet and the flue gas outlet are respectively arranged at two ends of the treatment tank, a water wheel device is arranged between the upper end of the solution tank and the bottom of the treatment tank and is used for lifting the treating agent solution in the solution tank and forming water spray and water mist to fill the treatment tank, a plurality of partition plates are vertically arranged in the treatment tank, each partition plate comprises an upper partition plate and a lower partition plate which are alternately arranged, the upper partition plate is in sealing connection with the top and two sides of the treatment tank, a flue gas channel is reserved between the upper partition plate and the liquid surface of the treating agent solution in the solution tank, the lower partition plate is in sealing connection with the two sides of the treatment tank, the flue gas channel is reserved at the upper end of the lower partition plate, and the lower end of the lower partition plate stretches into the liquid surface of the treating agent solution. The partition plates are arranged in the treatment box, so that the flue gas flows through the treatment box along an S-shaped route, then the water wheel device is utilized to lift the treating agent solution to form water spray and water mist to fill the treatment box, the contact area of the flue gas in the treatment box and the treating agent is increased, the treating agent solution and the flue gas are fully mixed for reaction, and the absorption and purification effects on pollutants in the flue gas are optimized.
Further, the water wheel device comprises a motor, a main shaft and a plurality of impellers uniformly arranged on the main shaft, wherein the motor is fixed on a mounting frame outside the solution tank, an output shaft of the motor is in transmission connection with one end of the main shaft, the main shaft is in rotary connection with a bearing seat fixed on the mounting frame, and the impellers and the partition plates are alternately arranged, so that water spray and water mist can be uniformly filled on a flue gas flow path.
The device further comprises an induced draft fan, wherein the smoke outlet is communicated with the induced draft fan through a flue and is used for guiding smoke and adjusting the flow of the smoke in the treatment box, and the motor and the induced draft fan are controlled through a control box fixed on the mounting frame.
Further, an adsorption layer in a horizontal state is arranged in the treatment box, and the adsorption layer is arranged at the upper end of the lower partition plate, intersected with the upper partition plate and fixedly connected with the inner wall of the treatment box. The treating agent solution is adhered to the adsorption layer to form a treating agent liquid film to react with the flue gas penetrating through the adsorption layer, so that the adsorption capacity of harmful components in the flue gas is improved.
Further, the adsorption layer comprises a pore plate and a filler adsorption layer, wherein the pore plate and the filler adsorption layer are sequentially and alternately arranged along the flow direction of the flue gas, so that the flue gas passes through the pore plate when flowing downwards in the flow direction of the flue gas, and passes through the filler adsorption layer when moving upwards, thereby avoiding the situation that dust enters the upper side of the filler adsorption layer and cannot be cleaned, and the filler adsorption layer is used for improving the flue gas purifying capacity of the adsorption layer.
Further, the pore plate and the filler adsorption layer are both in a wavy shape or a zigzag shape, so that the effective adsorption area of the adsorption layer is increased, and the flue gas purifying capacity is improved.
Further, the filler adsorption layer is an upper layer and a lower layer, and the middle of the pore plate is filled with adsorption filler.
Further, the thickness of the filler adsorption layer is 3-5 cm, and the adsorption filler is cobblestone with the particle size of 5-10 mm.
Further, a liquid outlet, a maintenance door and a liquid level box are arranged on the solution box, and the liquid outlet is arranged at one side of the lower end of the solution box and is used for discharging reacted waste liquid and sediment; the maintenance door is arranged at the front side of the solution tank and is used for cleaning the inner space of the solution tank and maintaining and replacing internal parts, and the maintenance door is a sealing door for preventing leakage of liquid;
The top of the treatment box is provided with a feed port which is communicated with the inside of the treatment box and used for feeding new treatment agent solution.
A flue gas purifying method, using the horizontal flue gas purifying apparatus as claimed in claim 9, comprising the steps of:
preparing a treating agent solution, namely preparing the treating agent solution with corresponding components and concentrations according to the types and the contents of harmful components in the flue gas;
step two, adding a treating agent solution:
A. Injecting the prepared treating agent solution into a solution box from a feed port, and ensuring that impellers in the water wheel device are contacted with the solution;
B. monitoring the liquid level of the treating agent solution in the solution tank through a liquid level tank, and controlling the draft of the impeller;
Step three, starting the water wheel device:
A. The motor is started by operating the control box, and the motor drives the main shaft to rotate so as to drive the impeller to rotate and lift water spray and water mist to fill the treatment box, wherein the water spray and the water mist are attached to the partition board and the adsorption layer in the treatment box and permeate the whole filler adsorption layer to be attached to the surface of the adsorption filler, so that a treatment agent liquid film is formed;
B. Setting the rotating speed of a motor according to the requirements so as to adjust the water spray and water mist generation amount, wherein the rotating speed is controlled to be 600-1500 r/min;
Step four, flue gas treatment:
A. starting an induced draft fan for exhausting, forming negative pressure in the treatment box, and introducing flue gas to be treated from a flue gas inlet on the treatment box;
B. after entering the treatment box, the flue gas is subjected to preliminary adsorption through an orifice plate below the flue gas inlet, so that most dust and a part of harmful components in the flue gas are removed;
C. then the flue gas sequentially passes through each filler adsorption layer and the pore plate along an S-shaped route to adsorb and remove the rest dust and harmful components;
D. Finally, the smoke outlet is discharged into a flue and blown out through an air outlet of the induced draft fan;
and step five, closing the water wheel device and the induced draft fan after the flue gas treatment is completed.
Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) According to the horizontal type flue gas purifying device provided by the invention, the water wheel device is utilized to lift the treating agent solution to form water spray and water mist, so that the treating agent solution and the flue gas are fully mixed and reacted, and the effect of absorbing and purifying pollutants in the flue gas is optimized; the device adopts a horizontal structure, is easy to install and overhaul, has high construction safety, does not need high-pressure water supply, has low energy consumption, greatly reduces equipment input cost and use cost, has no nozzle structure, does not have the problem of dust blocking nozzles, increases the stroke of the flue gas in the treatment box by arranging a baffle plate in the treatment box to ensure that the flue gas flows through the treatment box along an S-shaped route, ensures that the treating agent solution and the flue gas are fully mixed and reacted, and optimizes the absorption and purification effects on pollutants in the flue gas;
(2) The horizontal type flue gas purifying device provided by the invention adopts the impellers to raise water, generates large amounts of water spray and water mist, and further increases the contact area between the treating agent solution and the flue gas;
(3) According to the horizontal type flue gas purification device provided by the invention, the water wheel device is driven by the variable frequency motor, and the rotating speed of the impeller is regulated by regulating the rotating speed of the motor, so that the functions of generating different amounts of water spray and water mist can be realized;
(4) The horizontal type flue gas purifying device provided by the invention further comprises the induced draft fan, and the flow of flue gas in the treatment box can be improved by exhausting through the induced draft fan, so that the treatment efficiency is improved;
(5) According to the horizontal type flue gas purifying device provided by the invention, the induced draft fan is a variable frequency fan, and the flue gas flow in the treatment box can be regulated and controlled by regulating the rotating speed of the induced draft fan, so that the treatment efficiency and the purification quality are optimized;
(6) According to the horizontal type flue gas purifying device provided by the invention, the water spray and the water mist in the treatment box are attached to the pore plate, and the flue gas repeatedly passes through the pore plate and reacts with the water spray and the water mist in the treatment box and also fully contacts and reacts with the treating agent liquid film on the surface of the pore plate, so that the purifying efficiency and the purifying quality of the flue gas are greatly improved;
(7) The adsorption layer comprises the pore plate and the filler adsorption layer, and the filler adsorption layer can increase the purification effect of the adsorption layer;
(8) The horizontal type flue gas purifying device provided by the invention has the advantages that the adsorption filler is cobblestone, the surface of the cobblestone can be attached with the treating agent liquid film, when flue gas passes through gaps among the cobblestone, the cobblestone can be more fully contacted with the treating agent, and the purifying capacity of an adsorption layer is improved;
(9) According to the horizontal type flue gas purifying device provided by the invention, the pore plates and the filler adsorption layers are alternately arranged in sequence along the flow direction of flue gas, and in the flow process of the flue gas along the S-shaped line, the flue gas passes through the pore plates when flowing downwards and passes through the filler adsorption layers when moving upwards, so that dust is prevented from entering the upper sides of the filler adsorption layers and cannot be cleaned;
(10) According to the horizontal flue gas purifying device provided by the invention, the pore plate and the filler adsorption layer are in the wave shape or the fold line shape, so that the surface areas of the pore plate and the filler adsorption layer can be greatly increased, the effective adsorption area of the adsorption layer is increased, and the flue gas purifying capability is improved;
(11) The horizontal type flue gas purifying device provided by the invention is provided with the liquid outlet and the material inlet, so that waste liquid can be discharged through the liquid outlet at regular intervals, and new treating agent solution is added from the material inlet, so that the flue gas treatment efficiency and the purifying effect are ensured;
(12) According to the horizontal type flue gas purifying device provided by the invention, the liquid level box for monitoring the liquid level in the box is arranged on one side of the solution box, so that the liquid level of the treating agent solution in the solution box can be intuitively monitored through the liquid level box, the situation that water wheel devices fail and cannot form water spray and water mist due to the fact that the liquid level is too low is avoided, and the working resistance of the water wheel devices is too high and the energy consumption is increased due to the fact that the liquid level is too high;
(13) The invention provides a horizontal smoke purifying device, wherein the front side of a solution tank is provided with a maintenance door which is used for cleaning the inner space of the solution tank and maintaining and replacing internal parts, and the maintenance door is a sealing door for preventing liquid leakage;
(14) According to the horizontal type flue gas purifying device provided by the invention, the solution box is divided into a plurality of solution bins along the flow direction of flue gas, the solution bins are separated by the partition plates, the partition plates are arranged in an up-down alignment manner with the vertical pore plates, and different treating agent solutions can be respectively put into each solution bin to treat harmful components in the flue gas;
(15) The flue gas purification method provided by the invention has the advantages that the water spray and the water mist of the treating agent are fully contacted with the flue gas, so that the purpose of fully purifying the flue gas is achieved, the flue gas purification capability is improved by prolonging the flue gas stroke and increasing the adsorption layer, the flue gas purification efficiency and the purification effect are further optimized, the method can be applied to the purification treatment of flue gas dust removal, desulfurization and denitrification and other harmful components, and the flue gas treatment cost is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the flow direction of flue gas in the present invention;
FIG. 3 is a schematic diagram of a structure in which an orifice plate and a filler adsorption layer are in a zigzag shape;
FIG. 4 is a schematic structural view of a water wheel device according to the present invention;
FIG. 5 is a schematic view of a partial structure of an orifice plate in the present invention;
fig. 6, a front view of the present invention.
In the drawing, 1, a mounting frame, 2, a solution tank, 3, a treatment tank, 4, a water wheel device, 5, a flue, 6, an induced draft fan, 7, a control tank, 21, a liquid outlet, 22, a liquid level tank, 23, a maintenance door, 31, a smoke inlet, 32, a smoke outlet, 33, a partition plate, 34, an adsorption layer, 35, a material inlet, 41, a main shaft, 42, an impeller, 43, a bearing seat, 44, a motor, 61, an air outlet, 331, an upper partition plate, 332, a lower partition plate, 341, a pore plate, 342 and a filler adsorption layer.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.
Example 1
A horizontal type flue gas purifying device is shown in fig. 1 and comprises a solution tank 2 for containing a treating agent solution, a treatment tank 3 arranged at the upper end of the solution tank 2 and with the bottom open and communicated with the solution tank 2 up and down, a flue gas inlet 31 and a flue gas outlet 32 arranged on the treatment tank 3, the flue gas inlet 31 and the flue gas outlet 32 respectively arranged at two ends of the treatment tank 3, a water wheel device 4 arranged between the upper opening of the solution tank 2 and the bottom of the treatment tank 3 and used for lifting the treating agent solution in the solution tank 2 and forming water spray and water mist to fill the treatment tank 3, a plurality of baffles 33 arranged vertically in the treatment tank 3 and comprising an upper baffle 331 and a lower baffle 332 which are alternately arranged, wherein the upper baffle 331 is in sealing connection with the top and two sides of the treatment tank 3 and leaves a flue gas channel between the upper baffle 332 and the liquid surface of the treating agent solution in the solution tank 2, and the lower baffle 332 is in sealing connection with the two sides of the liquid surface of the treatment tank 3 and leaves a flue gas channel at the upper end and lower end of the flue gas channel.
The treatment agent solution contained in the solution tank 2 is absorbent solution for desulfurizing and denitrating flue gas, reagents for treating other harmful components can be added into the solution according to actual needs, a flue gas inlet 31 and a flue gas outlet 32 on the treatment tank 3 can be arranged at the top or on the side surface of the treatment tank 3, and the treatment agent solution is positioned at two ends of the treatment tank 3, so that the travel of the flue gas from the flue gas inlet 31 to the flue gas outlet 32 is maximized, the sufficient reaction time of the flue gas and the treatment agent solution is ensured, the harmful components in the flue gas are treated more thoroughly, and the water wheel device 4 is composed of a rotary driven impeller or a roller (such as a roller in the shape of an automobile tire) with a pattern on the surface, and a power device and a transmission mechanism for driving the rotary impeller or the roller to rotate.
The steps of purifying the flue gas using the horizontal flue gas purifying device in this embodiment are as follows:
preparing a treating agent solution, namely preparing the treating agent solution with corresponding components and concentrations according to the types and the contents of harmful components in the flue gas;
step two, injecting the prepared treating agent solution into the solution box 2, and ensuring that the water wheel device 4 contacts with the solution;
Step three, starting a water wheel device 4, and rotating the water wheel device 4 to lift the treating agent solution to form water spray and water mist to fill the treating box 3;
Step four, flue gas treatment:
A. The flue gas to be treated is introduced from the flue gas inlet 31 on the treatment box 3, and the flue gas is blocked from flowing along an S-shaped route in the treatment box 3 by the upper partition plate 331 and the lower partition plate 332;
B. The flue gas in the treatment box 3 fully contacts and reacts with water spray and water mist formed by the treating agent solution to remove dust and other harmful components in the flue gas;
C. the purified flue gas is discharged from a smoke outlet 32 on the treatment box 3 to enter the next working procedure;
and step five, closing the water wheel device 4 after the flue gas treatment is completed.
In the horizontal type flue gas purifying device in the embodiment, the water wheel device 4 is utilized to lift the treating agent solution to form water spray and water mist for fully mixing and reacting with the flue gas, so as to achieve the purpose of removing dust, sulfur-containing, nitrogen-containing and other harmful components in the flue gas; the horizontal type structure is adopted, so that the installation and maintenance are easy, the construction safety is high, high-pressure water supply is not needed, the energy consumption is low, the equipment input cost and the use cost are greatly reduced, the nozzle structure is not provided, the problem that dust blocks the nozzle does not exist, the flue gas flows through the treatment box 3 along an S-shaped route through the partition plate 33 arranged in the treatment box 3, the stroke of the flue gas in the treatment box is increased, the treating agent solution and the flue gas are fully mixed and reacted, and the absorption and purification effects on pollutants in the flue gas are optimized.
Example 2
The basic structure of the horizontal flue gas purifying device in this embodiment is the same as that of embodiment 1, and is different from and improved in that, as shown in fig. 1 and 4, the water wheel device 4 includes a motor 44, a main shaft 41 and a plurality of impellers 42 uniformly arranged on the main shaft 41, the motor 44 is fixed on a mounting frame 1 outside the solution tank 2, an output shaft of the motor is in transmission connection with one end of the main shaft 41, the main shaft 41 is in rotational connection with a bearing seat 43 fixed on the mounting frame 1, the motor 44 is started to drive the main shaft 41 to rotate, thereby driving the impellers 42 to rotate to achieve the purpose of lifting the treating agent solution to form water spray and mist, and the impellers 42 and the partition plates 33 are alternately arranged, so that the water spray and the mist can be uniformly filled in a flue gas flow path.
The number of the impellers 42 and the interval between the impellers 42 can be set according to the concentration of harmful components in the flue gas to be treated, the flow rate and other factors, in this embodiment, as shown in fig. 1 and 4, four impellers 42 are uniformly arranged on the main shaft 41, and the interval between the adjacent impellers 42 is 50cm, so that the method is suitable for treating industrial flue gas with small volume and low pollution.
The horizontal type flue gas purifying device in the embodiment adopts the impellers 42 to raise water, generates large amounts of water spray and water mist, further increases the contact area of the treating agent solution and flue gas, has good flue gas purifying effect and high efficiency, and simultaneously adopts the plurality of impellers 42 coaxially arranged at the same rotating speed to ensure that the water spray and the water mist are uniformly distributed in the treatment box 3 along the flowing wind direction of the flue gas, thereby optimizing the treatment effect better.
Example 3
The basic structure of the horizontal flue gas purifying device of this embodiment is the same as that of embodiment 2, and is different from and improved in that, as shown in fig. 1 and 6, the horizontal flue gas purifying device further comprises an induced draft fan 6, and the flue gas outlet 32 is communicated with the induced draft fan 6 through a flue 5. The induced draft fan 6 is started and then is pumped outwards, negative pressure is formed in the flue 5 and the treatment box 3, flue gas in the treatment box 3 is promoted to enter the induced draft fan 6 through the flue 5, and then is discharged through the air outlet 61 on the induced draft fan 6, so that the flue gas flow in the treatment box 3 is improved, and the treatment efficiency is further improved.
As shown in fig. 1 and 6, the motor 44 and the induced draft fan 6 are controlled by a control box 7 fixed on the mounting frame 1, and the induced draft fan 6 and the motor 44 are connected with the control box 7 by connecting wires, wherein the connecting wires are power wires and signal wires. In this embodiment, the induced draft fan 6 and the motor 44 are a variable frequency fan and a variable frequency motor respectively, and the rotation speed can be adjusted by an adjusting module in the control box 7.
In the horizontal flue gas purifying device in this embodiment, the rotation speed of the impeller 42 can be adjusted by adjusting the rotation speed of the motor 44 to realize the function of generating different amounts of water spray and water mist, when the concentration of harmful components in the flue gas is smaller or the flow rate of the flue gas is lower, the energy saving can be realized by reducing the rotation speed of the motor 44, and the use cost is reduced, otherwise, the rotation speed of the motor 44 can be increased to generate more water spray and water mist so as to achieve the purpose of fully contacting the flue gas with the treating agent to thoroughly remove the harmful components in the flue gas, and in addition, the flow of the flue gas in the treatment box 3 can be regulated and controlled by adjusting the rotation speed of the induced draft fan 6, so that the treatment efficiency and the purification quality are optimized.
Example 4
The basic structure of the horizontal flue gas purifying device of this embodiment is the same as that of any of embodiments 1 to 3, and is different from and improved in that, as shown in fig. 2, an adsorption layer 34 in a horizontal state is disposed in the treatment tank 3, and the adsorption layer 34 is disposed at the upper end of the lower partition 332, intersects with the upper partition 331, and is fixedly connected to the inner wall of the treatment tank 3. In this embodiment, the adsorption layer 34 is an orifice plate 341, as shown in fig. 5, the aperture of the orifice plate 341 is 3mm, the spacing between the edges of the orifice is 2mm, and the adsorption layer is not easy to be blocked by accumulated ash.
After the horizontal flue gas purifying device is started, water spray and water mist in the treatment box 3 are attached to the pore plate 341 to form a treating agent liquid film, after flue gas enters the treatment box 3, the flue gas is blocked by the partition plate 33 to flow along an S-shaped route and repeatedly passes through the pore plate 341, so that the flue gas is fully contacted and reacted with the treating agent liquid film on the surface of the pore plate 341 besides reacting with the water spray and the water mist in the treatment box 3, the purifying efficiency and the purifying quality of the flue gas are greatly improved, and in addition, the water spray and the water mist raised by the water wheel device 4 continuously clean the pore plate 341, so that the phenomenon that the pore plate 341 is blocked by accumulated ash does not need to be manually cleaned.
Example 5
The basic structure of the horizontal flue gas purifying device of this embodiment is the same as that of embodiment 4, and is different from and improved in that, as shown in fig. 2 and 3, the adsorption layer 34 includes an orifice plate 341 and a filler adsorption layer 342, and the filler adsorption layer 342 is used for increasing the purifying effect of the adsorption layer 34.
The filler adsorption layer 342 is an adsorption filler filled between the upper and lower layers of pore plates 341, and the filler in the filler adsorption layer 342 may be a solid filler with desulfurization and denitrification functions, or may be a common filler such as cobblestone.
In this embodiment, the thickness of the filler adsorption layer 342 is 3-5 cm, the adsorption filler is cobblestone with a particle size of 5-10 mm, the surface of cobblestone can be attached with a treating agent liquid film, when the flue gas passes through gaps among cobblestones, the cobblestone can be fully contacted with the treating agent, the purifying capability of the adsorption layer 34 is improved, meanwhile, the capability of the cobblestone layer for removing dust in the flue gas is greatly improved compared with the pore plate 341, in addition, the cobblestone is easy to obtain, can not be consumed, and the cost is greatly reduced compared with other fillers.
As shown in fig. 2 and 3, the orifice plate 341 and the filler adsorption layer 342 are alternately arranged in sequence along the flow direction of the flue gas. In the flowing process of the flue gas along the S-shaped line, the flue gas passes through the pore plate 341 when flowing downwards, and passes through the filler adsorption layer 342 when moving upwards, so that dust is prevented from entering the upper side of the filler adsorption layer 342 and cannot be cleaned, and the filler adsorption layer 342 is used for improving the flue gas purifying capability of the adsorption layer 34.
Example 6
The basic structure of the horizontal flue gas purifying device of this embodiment is the same as that of embodiment 5, and is different from and improved in that the orifice plate 341 and the filler adsorption layer 342 are both in a wavy or zigzag shape, so that the surface areas of the orifice plate 341 and the filler adsorption layer 342 can be greatly increased, thereby increasing the effective adsorption area of the adsorption layer 34 and improving the flue gas purifying capability.
In the horizontal flue gas purifying device of this embodiment, as shown in fig. 3, the hole plate 341 and the filler adsorption layer 342 are both in a zigzag shape, and the adsorption capacity is about twice that of the adsorption layer 34 in a flat plate shape as shown in fig. 2.
Example 7
The horizontal flue gas purifying device of this embodiment has the same basic structure as any of embodiments 1 to 6, and is different and improved in that, as shown in fig. 1 and 6, a liquid outlet 21, a maintenance door 23 and a liquid level tank 22 are arranged on the solution tank 2, the liquid outlet 21 is arranged on one side of the lower end of the solution tank 2, the maintenance door 23 is arranged on the front side of the solution tank 2, the liquid level tank 22 is arranged on one side of the upper end of the solution tank 2, a material inlet 35 is arranged at the top of the treatment tank 3, and the material inlet 35 is communicated with the inside of the treatment tank 3.
After a period of use, the concentration of the effective components in the treating agent solution in the solution tank 2 is reduced, so that the treating agent solution is disabled and a large amount of precipitation is generated. After the liquid outlet 21 and the material inlet 35 are arranged, the waste liquid can be discharged through the liquid outlet 21 at regular intervals, and new treating agent solution is added from the material inlet 35, so that the flue gas treatment efficiency and the purification effect are ensured.
After long-time use, the consumption of the treating agent solution in the solution tank 2 can lead to the drop of the liquid level, and the adding of the treating agent solution in the middle can not be accurately controlled, so that the treating agent solution in the solution tank 2 fluctuates up and down, and further the draft of the water wheel device 4 fluctuates, and the water spray and the water mist generation amount are affected. The liquid level box 22 is arranged to visually monitor the liquid level of the treating agent solution in the solution box 2, so that the situation that the water wheel device 4 fails and cannot form water spray and water mist due to the fact that the liquid level is too low is avoided, and the working resistance of the water wheel device 4 is too high and the energy consumption is increased due to the fact that the liquid level is too high.
The front side of the solution tank 2 is provided with a maintenance door 23 for cleaning the inner space of the solution tank 2 and maintaining and replacing internal parts, and the maintenance door 23 is a sealing door for preventing liquid leakage. During normal use, the maintenance door 23 is in a closed and sealed state, a large amount of sludge deposits on the bottom of the solution tank 2 after long-term use, the maintenance door 23 can be opened for cleaning, and when the water wheel device 4 in the device is damaged, the maintenance door 23 can be used for replacement and maintenance.
Example 8
A flue gas purification method using the horizontal flue gas purification apparatus described in example 7, comprising the following steps:
preparing a treating agent solution, namely preparing the treating agent solution with corresponding components and concentrations according to the types and the contents of harmful components in the flue gas;
step two, adding a treating agent solution:
A. Injecting the prepared treating agent solution into the solution tank 2 from the feed port 35, and ensuring that the impeller 42 in the water wheel device 4 is contacted with the solution;
B. The liquid level of the treating agent solution in the solution tank 2 is monitored through the liquid level tank 22, and the draft of the impeller 42 is controlled;
Step three, starting the water wheel device:
A. The motor 44 is started by operating the control box 7, the motor 44 drives the main shaft 41 to rotate, and then the impeller 42 is driven to rotate to lift water spray and water mist to fill the treatment box 3, the water spray and the water mist are attached to the partition plate 33 and the adsorption layer 34 in the treatment box 3 and permeate the whole filler adsorption layer 342 to be attached to the surface of the adsorption filler, so that a treatment agent liquid film is formed;
B. setting the rotating speed of the motor 44 according to the requirement to adjust the water spray and water mist generation amount, and controlling the rotating speed to be 600-1500 r/min;
Step four, flue gas treatment:
A. Starting an induced draft fan 6 to exhaust air, forming negative pressure in the treatment box 3, and introducing flue gas to be treated from a flue gas inlet 31 on the treatment box 3;
B. After entering the treatment box 3, the flue gas is subjected to preliminary adsorption through an orifice plate 341 below the flue gas inlet 31, so that most dust and a part of harmful components in the flue gas are removed;
C. Then the flue gas sequentially passes through each filler adsorption layer 342 and the pore plate 341 along the S-shaped route to adsorb and remove the rest dust and harmful components;
D. finally, the flue gas is discharged into the flue 5 through the smoke outlet 32 and blown out through the air outlet 61 of the induced draft fan 6;
and step five, closing the water wheel device 4 and the induced draft fan 6 after the flue gas treatment is completed.
The flue gas purification method in this embodiment fully contacts with the flue gas by using the water spray and the water mist of the treating agent to achieve the purpose of fully purifying the flue gas, and improves the flue gas purification capability by prolonging the flue gas stroke and increasing the adsorption layer 34, so that the flue gas purification efficiency and the purification effect are further optimized.
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.

Claims (4)

1.一种卧式烟气净化装置，其特征在于，包括：1. A horizontal flue gas purification device, characterized in that it comprises: 溶液箱（2），其用于盛放处理剂溶液；A solution tank (2) for containing a treatment agent solution; 处理箱（3），其设置在所述溶液箱（2）上端，且底部开放与所述溶液箱（2）上下连通；所述处理箱（3）上设置有进烟口（31）和排烟口（32），所述进烟口（31）和排烟口（32）分别位于所述处理箱（3）的两端；A treatment box (3) is arranged at the upper end of the solution box (2) and has an open bottom and is in vertical communication with the solution box (2); a smoke inlet (31) and a smoke exhaust port (32) are arranged on the treatment box (3), and the smoke inlet (31) and the smoke exhaust port (32) are respectively located at two ends of the treatment box (3); 水轮装置（4），其设置在所述溶液箱（2）上口与所述处理箱（3）底部之间，用于将所述溶液箱（2）内的处理剂溶液扬起，并形成水花和水雾充满所述处理箱（3）；A water wheel device (4) is arranged between the upper opening of the solution tank (2) and the bottom of the treatment tank (3), and is used to lift the treatment agent solution in the solution tank (2) and form water spray and water mist to fill the treatment tank (3); 所述处理箱（3）内竖向设置有若干隔板（33），所述隔板（33）包括交替设置的上隔板（331）和下隔板（332），其中：所述上隔板（331）与所述处理箱（3）的顶部和两侧密封连接，且与所述溶液箱（2）内的处理剂溶液液面之间留有烟气通道；所述下隔板（332）与所述处理箱（3）的两侧密封连接，且其上端留有烟气通道，下端伸入处理剂溶液液面以下；所述水轮装置（4）包括电机（44）、主轴（41）和均匀设置在所述主轴（41）上的若干叶轮（42），所述电机（44）固定在所述溶液箱（2）外部的安装架（1）上，且其输出轴与所述主轴（41）一端传动连接，所述主轴（41）与固定在所述安装架（1）上的轴承座（43）转动连接；所述叶轮（42）与所述隔板（33）交替设置；A plurality of partitions (33) are vertically arranged in the treatment box (3), and the partitions (33) include upper partitions (331) and lower partitions (332) arranged alternately, wherein: the upper partition (331) is sealedly connected to the top and both sides of the treatment box (3), and a smoke passage is left between the upper partition (331) and the liquid level of the treatment agent solution in the solution box (2); the lower partition (332) is sealedly connected to both sides of the treatment box (3), and a smoke passage is left at its upper end, and the lower end extends into the treatment agent solution. The water wheel device (4) comprises a motor (44), a main shaft (41) and a plurality of impellers (42) uniformly arranged on the main shaft (41); the motor (44) is fixed on a mounting frame (1) outside the solution tank (2), and its output shaft is drivingly connected to one end of the main shaft (41); the main shaft (41) is rotatably connected to a bearing seat (43) fixed on the mounting frame (1); the impellers (42) and the partitions (33) are alternately arranged; 所述处理箱（3）内设置有呈水平状态的吸附层（34），所述吸附层（34）设置在所述下隔板（332）上端，与所述上隔板（331）相交，并与所述处理箱（3）内壁固定连接；A horizontal adsorption layer (34) is provided in the processing box (3); the adsorption layer (34) is provided at the upper end of the lower partition (332), intersects with the upper partition (331), and is fixedly connected to the inner wall of the processing box (3); 所述吸附层（34）包括孔板（341）和填料吸附层（342），所述孔板（341）和填料吸附层（342）沿烟气流动方向依次交替设置，烟气沿“S”形线路流动过程中，向下流动时穿过孔板（341），向上运动时透过填料吸附层（342）；The adsorption layer (34) comprises a perforated plate (341) and a filler adsorption layer (342), wherein the perforated plate (341) and the filler adsorption layer (342) are arranged alternately in sequence along the flow direction of the smoke, and when the smoke flows along the “S”-shaped line, it passes through the perforated plate (341) when flowing downward, and passes through the filler adsorption layer (342) when moving upward; 还包括引风机（6），所述排烟口（32）通过烟道（5）与所述引风机（6）连通；所述电机（44）和引风机（6）通过固定在所述安装架（1）上的控制箱（7）控制；It also includes an induced draft fan (6), the smoke exhaust port (32) being in communication with the induced draft fan (6) via a smoke duct (5); the motor (44) and the induced draft fan (6) are controlled by a control box (7) fixed to the mounting frame (1); 所述孔板（341）和填料吸附层（342）均呈波浪形或折线形；The orifice plate (341) and the filler adsorption layer (342) are both in a wave shape or a broken line shape; 所述填料吸附层（342）为上下两层所述孔板（341）中间填充吸附填料。The filler adsorption layer (342) is an adsorption filler filled between the upper and lower layers of the orifice plates (341). 2.根据权利要求1所述的一种卧式烟气净化装置，其特征在于：所述填料吸附层（342）厚度为3～5cm，所述吸附填料为粒径在5～10mm的鹅卵石。2. A horizontal flue gas purification device according to claim 1, characterized in that: the filler adsorption layer (342) has a thickness of 3 to 5 cm, and the adsorption filler is pebbles with a particle size of 5 to 10 mm. 3.根据权利要求1或2所述的一种卧式烟气净化装置，其特征在于：其中，3. A horizontal flue gas purification device according to claim 1 or 2, characterized in that: 所述溶液箱（2）上设置有排液口（21）、维修门（23）和液位箱（22），所述排液口（21）设置在所述溶液箱（2）下端一侧，所述维修门（23）设置在所述溶液箱（2）前侧，所述液位箱（22）设置在所述溶液箱（2）上端一侧；The solution tank (2) is provided with a liquid discharge port (21), a maintenance door (23) and a liquid level box (22), wherein the liquid discharge port (21) is provided at one side of the lower end of the solution tank (2), the maintenance door (23) is provided at the front side of the solution tank (2), and the liquid level box (22) is provided at one side of the upper end of the solution tank (2); 所述处理箱（3）顶部设置有投料口（35），所述投料口（35）与所述处理箱（3）内部连通。A feeding port (35) is provided on the top of the processing box (3), and the feeding port (35) is communicated with the interior of the processing box (3). 4.一种烟气净化方法，其特征在于，使用权利要求3中所述的卧式烟气净化装置净化烟气，具体步骤如下：4. A flue gas purification method, characterized in that the flue gas is purified using the horizontal flue gas purification device described in claim 3, and the specific steps are as follows: 步骤一、调配处理剂溶液：根据烟气中有害成分的种类和含量调配相应成分和浓度的处理剂溶液；Step 1: Prepare treatment agent solution: prepare treatment agent solution with corresponding composition and concentration according to the type and content of harmful components in the flue gas; 步骤二、投放处理剂溶液：Step 2: Add treatment solution: A、将调配好的处理剂溶液从投料口（35）注入溶液箱（2）内，并保证水轮装置（4）中的叶轮（42）与溶液接触；A. injecting the prepared treatment agent solution into the solution tank (2) from the feeding port (35), and ensuring that the impeller (42) in the water wheel device (4) is in contact with the solution; B、通过液位箱（22）监控溶液箱（2）内处理剂溶液液位，控制叶轮（42）吃水深度；B. monitoring the liquid level of the treatment agent solution in the solution tank (2) through the liquid level tank (22) and controlling the draft depth of the impeller (42); 步骤三、启动水轮装置：Step 3: Start the water wheel device: A、通过操作控制箱（7）启动电机（44），电机（44）驱动主轴（41）转动，进而驱动叶轮（42）转动扬起水花和水雾充满处理箱（3），水花和水雾附着在处理箱（3）内的隔板（33）和吸附层（34）上，并渗透整个填料吸附层（342）附着在吸附填料表面，形成处理剂液膜；A. The motor (44) is started by operating the control box (7). The motor (44) drives the main shaft (41) to rotate, thereby driving the impeller (42) to rotate to raise water spray and water mist to fill the treatment box (3). The water spray and water mist adhere to the partition (33) and the adsorption layer (34) in the treatment box (3), and penetrate the entire filler adsorption layer (342) to adhere to the surface of the adsorption filler, thereby forming a treatment agent liquid film; B、根据需求设定电机（44）转速，以调节水花和水雾产生量，转速控制在600～1500r/min；B. Setting the speed of the motor (44) according to demand to adjust the amount of water splash and water mist generated, and the speed is controlled at 600 to 1500 r/min; 步骤四、烟气处理：Step 4: Flue gas treatment: A、启动引风机（6）抽气，使处理箱（3）内形成负压，并从处理箱（3）上的进烟口（31）通入待处理烟气；A. Starting the induced draft fan (6) to extract air so as to form a negative pressure in the treatment box (3), and introducing the flue gas to be treated from the smoke inlet (31) on the treatment box (3); B、烟气进入处理箱（3）后经进烟口（31）下方的孔板（341）进行初步吸附，除去烟气中的大部分灰尘和一部分有害成分；B. After the flue gas enters the treatment box (3), it is initially adsorbed by the perforated plate (341) below the smoke inlet (31), thereby removing most of the dust and some harmful components in the flue gas; C、然后烟气沿“S”形路线依次经过各填料吸附层（342）和孔板（341）吸附除去其余的灰尘和有害成分；C. The flue gas then passes through each filler adsorption layer (342) and the perforated plate (341) in sequence along an "S"-shaped route to remove the remaining dust and harmful components; D、最后烟气经排烟口（32）排入烟道（5），并经引风机（6）的出风口（61）吹出；D. Finally, the smoke is discharged into the smoke duct (5) through the smoke exhaust port (32) and blown out through the air outlet (61) of the induced draft fan (6); 步骤五、烟气处理完成后关闭水轮装置（4）和引风机（6）。Step 5: After the smoke treatment is completed, the water wheel device (4) and the induced draft fan (6) are turned off.
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