Horizontal flue gas purification device and purification method

Abstract

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, has 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

Technical Field

[0001] The invention relates to the technical field of flue gas treatment, in particular to a horizontal flue gas purification device and a purification method. Background Art

[0002] Studies have shown that carbon dioxide emitted during combustion is the main substance causing the greenhouse effect, and sulfur dioxide, nitrogen dioxide and fly ash particles emitted are the main sources of air pollution. How to eliminate these pollutions is an urgent problem to be solved.

[0003] At present, there are several main methods for flue gas desulfurization and denitrification (nitrogen): 1. Calcium-based absorbent method: lime powder or lime slurry is sprayed into the flue to react with sulfur dioxide to generate sulfate and other particulate matter, which is captured by the dust collector along with the flue gas. 2. Electron beam method: After the flue gas is irradiated by an electron beam (X-ray), most of the electron beam energy is absorbed by nitrogen, oxygen and water vapor, generating a large number of highly reactive free radicals; sulfur dioxide and nitrogen dioxide are oxidized by the above-mentioned active free radicals to generate sulfuric acid and nitric acid, respectively; sulfuric acid and nitric acid react with the previously injected ammonia to generate ammonium sulfate and ammonium nitrate aerosol powder particles. 3. Catalyst method: copper oxide, aluminum oxide, zinc oxide, etc. are used to remove sulfur dioxide and nitrogen dioxide.

[0004] In recent years, combined desulfurization and denitrification technology is the development direction of flue gas treatment. The common desulfurization and denitrification devices in the prior art are generally vertical treatment towers. The flue gas is passed into the treatment tower and the harmful components in the flue gas are absorbed by spraying absorbent. However, the above-mentioned treatment tower has the following disadvantages: 1. The vertical structure is adopted, which is difficult to install and maintain, and the construction safety is poor; 2. The high height of the tower body leads to excessive water supply pressure and high energy consumption; 3. The nozzle is easily blocked by dust in the flue gas; 4. After long-term use, the dust in the flue gas easily forms mud and accumulates in the tower body, affecting the flue gas treatment effect and is difficult to clean; 5. The flue gas flow is small and the treatment efficiency is low.

[0005] After searching, the Chinese patent, authorization announcement number: CN 106000062 B, authorization announcement date: 2018.08.21, discloses a desulfurization, denitrification, dust removal and mist removal integrated tower, a cyclone ion cutting device is arranged in the three-dimensional tower, the upper part of which is a cylindrical cyclone cylinder, and the lower part is a cylindrical air guide cover, the air guide cover is provided with vertical strip-shaped guide holes, the guide holes are evenly distributed along the circumference of the lower part of the air guide cover, and a circle of grid-shaped grid is arranged around the air guide cover, and the position of the grid corresponds to the position of the guide hole; the upper end of the cyclone cylinder extends upward through the top of the three-dimensional tower and extends out of the three-dimensional tower, a baffle is arranged between the cyclone cylinder and the three-dimensional tower, and a sodium alkali solution spray layer and a multi-stage demister are arranged from bottom to top in the cyclone cylinder; a conical regeneration tank is arranged below the cyclone ion cutting device, and the two are connected through a downcomer, the upper end of the downcomer extends into the air guide cover, and the lower end is suspended on the upper part of the regeneration tank through a support frame. The tower body of this invention adopts a vertical structure, which is difficult to install and maintain, and has poor construction safety; the large height of the tower body leads to excessive water supply pressure and high energy consumption; the equipment investment cost and use cost are large; after long-term use, the dust in the flue gas easily forms mud and accumulates in the tower body, affecting the flue gas treatment effect and is difficult to clean.

[0006] There is also a Chinese patent, with the authorization announcement number: CN 106390706 B, and the authorization announcement date: 2018.10.23, which discloses a rain curtain type desulfurization spray tower, including a tank body, a pulse stirring water distribution pipe, an oxidation distribution pipe, a partition component, a central exhaust pipe component, a spiral tower plate component, a spray pipe component, and a demister. The rain curtain type desulfurization spray tower adopts a rain curtain type spray structure to wash the coal-fired flue gas, and does not require the spray pipe nozzle to atomize the limestone slurry. The grinding accuracy of the limestone particles and the outlet pressure of the spray circulation pump can be moderately reduced, the spray pipe nozzle is not easy to be blocked, and the energy consumption of the spray circulation pump is small, thereby reducing the operating cost of the rain curtain type desulfurization spray tower. The oxidation fan is transported to the rain curtain desulfurization spray tower to isolate the waste gas after oxidizing calcium sulfite in the limestone slurry from the coal-fired flue gas. The oxygen content in the coal-fired flue gas at the outlet of the rain curtain desulfurization spray tower is low, which does not affect the subsequent denitrification process using the wet complex absorption method, solves the process problems of the wet complex absorption method, and promotes the application of the low-cost wet complex absorption method. However, this invention has the same disadvantages as the above invention. Summary of the invention

[0007] Technical problem to be solved by the invention

[0008] In view of the problems that the existing vertical flue gas treatment towers are difficult to install and maintain, have poor construction safety, have a large tower body resulting in excessive water supply pressure, high energy consumption, and high equipment investment cost and use cost, the present invention provides a horizontal flue gas purification device and purification method, which utilizes a water wheel device to lift a treatment agent solution to form water splashes and water mist, so that the treatment agent solution and the flue gas are fully mixed and reacted, thereby optimizing the absorption and purification effect of pollutants in the flue gas; adopting a horizontal structure, it is easy to install and maintain, and has high construction safety; no high-pressure water supply is required, energy consumption is low, and equipment investment cost and use cost are greatly reduced; there is no nozzle structure, and there is no problem of dust clogging the nozzle; by arranging a partition in the treatment box to make the flue gas flow through the treatment box along an "S"-shaped route, the travel of the flue gas in the treatment box is increased, the treatment agent solution and the flue gas are fully mixed and reacted, and the absorption and purification effect of pollutants in the flue gas is optimized.

[0009] Technical Solution

[0010] To solve the above problems, the technical solution provided by the present invention is:

[0011] A horizontal flue gas purification device comprises: a solution tank, which is used to hold a treatment agent solution; and a treatment box, which is arranged at the upper end of the solution box and has an open bottom that is connected to the solution box from top to bottom; a smoke inlet and a smoke exhaust port are arranged on the treatment box, and the smoke inlet and the smoke exhaust port are respectively located at the two ends of the treatment box; and a water wheel device, which is arranged between the upper opening of the solution box and the bottom of the treatment box, and is used to lift the treatment agent solution in the solution box and form water splashes and water mist to fill the treatment box; a plurality of partitions are vertically arranged in the treatment box, and the partitions include upper partitions and lower partitions that are alternately arranged, wherein: the upper partition is sealed and connected to the top and both sides of the treatment box, and a smoke channel is left between the upper partition and 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 smoke channel is left at its upper end, and the lower end extends below the liquid level of the treatment agent solution. By setting a partition in the treatment box, the flue gas is allowed to flow through the treatment box along an "S"-shaped route, and then the treatment agent solution is lifted up by a water wheel device to form water splashes and water mist to fill the treatment box, thereby increasing the contact area between the flue gas and the treatment agent in the treatment box, allowing the treatment agent solution and the flue gas to fully mix and react, thereby optimizing the absorption and purification effect of pollutants in the flue gas.

[0012] Furthermore, the water wheel device includes a motor, a main shaft and a plurality of impellers evenly arranged on the main shaft, the motor is fixed on a mounting frame outside the solution tank, and its output shaft is drivingly connected to one end of the main shaft, and the main shaft is rotatably connected to a bearing seat fixed on the mounting frame; the impellers and the partitions are alternately arranged so that water splashes and water mist can be evenly filled into the flue gas flow path.

[0013] Furthermore, it also includes an induced draft fan, the smoke exhaust port is connected to the induced draft fan through a flue, and is used for smoke drainage and adjustment of smoke flow in the treatment box; the motor and the induced draft fan are controlled by a control box fixed on the mounting frame.

[0014] Furthermore, a horizontal adsorption layer is provided in the treatment box, and the adsorption layer is provided at the upper end of the lower partition, intersecting with the upper partition, and fixedly connected with the inner wall of the treatment box. The treatment agent solution adheres to the adsorption layer to form a treatment agent liquid film that reacts with the flue gas that passes through the adsorption layer, thereby improving the adsorption capacity of harmful components in the flue gas.

[0015] Furthermore, the adsorption layer includes a perforated plate and a filler adsorption layer, and the perforated plate and the filler adsorption layer are alternately arranged in sequence along the flow direction of the flue gas, so that the flue gas passes through the perforated plate when flowing downward in its flow direction, and passes through the filler adsorption layer when moving upward, thereby preventing dust from entering the upper side of the filler adsorption layer and becoming unable to be cleaned; the filler adsorption layer is used to improve the flue gas purification capacity of the adsorption layer.

[0016] Furthermore, the orifice plate and the filler adsorption layer are both wavy or broken line shaped, which increases the effective adsorption area of ​​the adsorption layer and improves the flue gas purification capacity.

[0017] Furthermore, the filler adsorption layer is an adsorption filler filled between the upper and lower layers of the orifice plates.

[0018] Furthermore, the filler adsorption layer has a thickness of 3 to 5 cm, and the adsorption filler is pebbles with a particle size of 5 to 10 mm.

[0019] Furthermore, the solution tank is provided with a drain port, a maintenance door and a liquid level box. The drain port is provided at one side of the lower end of the solution tank for discharging waste liquid and precipitation after the reaction; the maintenance door is provided at the front side of the solution tank for cleaning the internal space of the solution tank and repairing and replacing the internal parts, and the maintenance door is a sealed door to prevent leakage; the liquid level box is provided at one side of the upper end of the solution tank and is connected to the solution tank, and the liquid level of the treatment agent solution in the solution tank can be intuitively monitored through the liquid level box to avoid the liquid level being too low or too high;

[0020] A feeding port is arranged on the top of the treatment box, and the feeding port is communicated with the inside of the treatment box for feeding new treatment agent solution.

[0021] A flue gas purification method, using the horizontal flue gas purification device described in claim 9 to purify flue gas, the specific steps are as follows:

[0022] 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;

[0023] Step 2: Add treatment solution:

[0024] A. Inject the prepared treatment agent solution into the solution tank from the feeding port, and ensure that the impeller in the water wheel device is in contact with the solution;

[0025] B. Monitor the liquid level of the treatment agent solution in the solution tank through the liquid level box to control the water depth of the impeller;

[0026] Step 3: Start the water wheel device:

[0027] A. Start the motor by operating the control box. The motor drives the main shaft to rotate, and then drives the impeller to rotate to raise water spray and water mist to fill the treatment box. The water spray and water mist adhere to the partition and adsorption layer in the treatment box, and penetrate the entire filler adsorption layer and adhere to the surface of the adsorption filler to form a treatment agent liquid film;

[0028] B. Set the motor speed according to demand to adjust the amount of water splash and water mist, and the speed is controlled at 600-1500r / min;

[0029] Step 4: Flue gas treatment:

[0030] A. Start the induced draft fan to extract air, so that negative pressure is formed in the treatment box, and let the smoke to be treated enter from the smoke inlet on the treatment box;

[0031] B. After the flue gas enters the treatment box, it is initially adsorbed by the perforated plate below the smoke inlet to remove most of the dust and some harmful components in the flue gas;

[0032] C. Then the flue gas passes through each filler adsorption layer and perforated plate in turn along an "S"-shaped route to remove the remaining dust and harmful components;

[0033] D. Finally, the smoke is discharged into the flue through the exhaust port and blown out through the outlet of the induced draft fan;

[0034] Step 5: After the flue gas treatment is completed, turn off the water turbine device and the induced draft fan.

[0035] Beneficial Effects

[0036] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0037] (1) The present invention provides a horizontal flue gas purification device, which uses a water wheel device to lift the treatment agent solution to form water splashes and water mist, so that the treatment agent solution and the flue gas are fully mixed and reacted, thereby optimizing the absorption and purification effect of pollutants in the flue gas; due to the horizontal structure, it is easy to install and repair, and the construction safety is high; no high-pressure water supply is required, the energy consumption is low, and the equipment investment cost and use cost are greatly reduced; there is no nozzle structure, and there is no problem of dust clogging the nozzle; by arranging a partition in the treatment box to make the flue gas flow through the treatment box along an "S"-shaped route, the travel of the flue gas in the treatment box is increased, so that the treatment agent solution and the flue gas are fully mixed and reacted, thereby optimizing the absorption and purification effect of pollutants in the flue gas;

[0038] (2) The present invention provides a horizontal flue gas purification device, which uses an impeller to pump water, generates a large amount of water splash and water mist, thereby increasing the contact area between the treatment agent solution and the flue gas; a plurality of impellers are coaxially arranged with the same rotation speed to ensure that the water splash and water mist are evenly distributed along the wind direction of the flue gas flow in the treatment box;

[0039] (3) The present invention provides a horizontal flue gas purification device, in which the water wheel device is driven by a variable frequency motor, and the impeller speed is adjusted by adjusting the motor speed, so that different amounts of water splashes and water mist can be generated;

[0040] (4) The horizontal flue gas purification device provided by the present invention further includes an induced draft fan, which can increase the flue gas flow rate in the treatment box by exhausting air through the induced draft fan, thereby improving the treatment efficiency;

[0041] (5) The invention provides a horizontal flue gas purification device, wherein the induced draft fan is a variable frequency fan, and the flue gas flow rate in the treatment box can be regulated by adjusting the speed of the induced draft fan, thereby optimizing the treatment efficiency and purification quality;

[0042] (6) The present invention provides a horizontal flue gas purification device, in which the water splashes and water mist in the treatment box are attached to the orifice plate. The flue gas repeatedly passes through the orifice plate, and in addition to reacting with the water splashes and water mist in the treatment box, it also fully contacts and reacts with the treatment agent liquid film on the surface of the orifice plate, thereby greatly improving the purification efficiency and purification quality of the flue gas. In addition, since the water splashes and water mist raised by the water wheel device continuously clean the orifice plate, the surface of the orifice plate will not be clogged by dust, and manual cleaning is not required.

[0043] (7) The present invention provides a horizontal flue gas purification device, wherein the adsorption layer includes a perforated plate and a filler adsorption layer, and the filler adsorption layer can increase the purification effect of the adsorption layer;

[0044] (8) The present invention provides a horizontal flue gas purification device, wherein the adsorption filler is pebbles, and a treatment agent liquid film can be attached to the surface of the pebbles. When the flue gas passes through the gaps between the pebbles, it can be more fully in contact with the treatment agent, thereby improving the purification capacity of the adsorption layer; at the same time, the ability of the pebble layer to remove dust in the flue gas is greatly improved compared with the orifice plate; in addition, the pebbles are easy to obtain and will not be consumed, and the cost is greatly reduced compared with other fillers;

[0045] (9) The present invention provides a horizontal flue gas purification device, in which the orifice plate and the filler adsorption layer are alternately arranged in the direction of flue gas flow. When the flue gas flows along the "S"-shaped line, it passes through the orifice plate when flowing downward and passes through the filler adsorption layer when moving upward, thereby preventing dust from entering the upper side of the filler adsorption layer and making it impossible to clean;

[0046] (10) The present invention provides a horizontal flue gas purification device, wherein the orifice plate and the filler adsorption layer are both wavy or zigzag, which can greatly increase the surface area of ​​the orifice plate and the filler adsorption layer, thereby increasing the effective adsorption area of ​​the adsorption layer and improving the flue gas purification capacity;

[0047] (11) The present invention provides a horizontal flue gas purification device, which is provided with a liquid discharge port and a feeding port, and the waste liquid can be discharged through the liquid discharge port regularly, and a new treatment agent solution can be added from the feeding port to ensure the flue gas treatment efficiency and purification effect;

[0048] (12) The present invention provides a horizontal flue gas purification device, in which a liquid level box for monitoring the liquid level in the solution tank is arranged on one side of the solution tank. The liquid level box can intuitively monitor the liquid level of the treatment agent solution in the solution tank to avoid the failure of the water wheel device due to the low liquid level and the inability to form water splashes and water mist, and the excessively high liquid level causing the working resistance of the water wheel device to be too large and the energy consumption to increase;

[0049] (13) The present invention provides a horizontal flue gas purification device, in which a maintenance door is provided on the front side of the solution tank for cleaning the internal space of the solution tank and repairing and replacing the internal parts. The maintenance door is a sealed door to prevent leakage;

[0050] (14) The present invention provides a horizontal flue gas purification device, wherein the solution tank is divided into a plurality of solution tanks along the flue gas flow direction, and the solution tanks are separated by partitions, and the partitions are aligned with the vertical orifice plates up and down, and different treatment agent solutions can be added to each solution tank to treat harmful components in the flue gas respectively;

[0051] (15) The present invention provides a flue gas purification method, which utilizes the treatment agent water splash and water mist to fully contact with the flue gas to achieve the purpose of fully purifying the flue gas, and improves the flue gas purification capacity by extending the flue gas journey and increasing the adsorption layer, so that the flue gas purification efficiency and purification effect are further optimized. This method can be applied to flue gas dust removal, desulfurization and denitrification, and purification of other harmful components, and the flue gas treatment cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 , a schematic diagram of the structure of the present invention;

[0053] Figure 2 , a schematic diagram of the flue gas flow direction in the present invention;

[0054] Figure 3 , a schematic diagram of the structure of the orifice plate and the filler adsorption layer in the present invention in a broken line shape;

[0055] Figure 4 , a schematic diagram of the structure of the water wheel device in the present invention;

[0056] Figure 5 , a schematic diagram of the local structure of the orifice plate in the present invention;

[0057] Figure 6 , a front view of the present invention.

[0058] In the attached drawings: 1. mounting frame; 2. solution tank; 3. treatment tank; 4. water wheel device; 5. flue; 6. induced draft fan; 7. control box; 21. drain port; 22. liquid level box; 23. maintenance door; 31. smoke inlet; 32. smoke exhaust port; 33. partition; 34. adsorption layer; 35. feeding port; 41. main shaft; 42. impeller; 43. bearing seat; 44. motor; 61. air outlet; 331. upper partition; 332. lower partition; 341. orifice plate; 342. packing adsorption layer. DETAILED DESCRIPTION

[0059] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0060] Example 1

[0061] A horizontal flue gas purification device, such as Figure 1As shown, it includes: a solution tank 2, which is used to hold a treatment agent solution; and a treatment tank 3, which is arranged at the upper end of the solution tank 2, and the bottom is open and connected to the solution tank 2 from top to bottom; the treatment tank 3 is provided with a smoke inlet 31 and a smoke outlet 32, and the smoke inlet 31 and the smoke outlet 32 ​​are respectively located at the two ends of the treatment tank 3; and a water wheel device 4, which is arranged between the upper end 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; as shown Figure 1 , 2 As shown, 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 that are alternately arranged, 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 below the liquid level of the treatment agent solution.

[0062] The treatment agent solution contained in the solution tank 2 is an absorbent solution for flue gas desulfurization and denitrification, and reagents for treating other harmful components can also be added to the solution according to actual needs; the smoke inlet 31 and the smoke exhaust port 32 on the treatment box 3 can be set on the top or side of the treatment box 3, as long as they are located at the two ends of the treatment box 3, the purpose is to maximize the travel of the flue gas from the smoke inlet 31 to the smoke exhaust port 32, thereby ensuring that the flue gas and the treatment agent solution have sufficient reaction time, so that the harmful components in the flue gas are treated more thoroughly; the water wheel device 4 is composed of a rotationally driven impeller or a roller with a patterned protrusion on the surface (such as a roller in the shape of a car tire), as well as a power device and a transmission mechanism for driving it to rotate.

[0063] The steps of purifying flue gas using the horizontal flue gas purification device in this embodiment are as follows:

[0064] 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;

[0065] Step 2: inject the prepared treatment agent solution into the solution tank 2, and ensure that the water wheel device 4 is in contact with the solution;

[0066] Step 3, start the water wheel device 4, the water wheel device 4 rotates to lift the treatment agent solution to form water spray and water mist to fill the treatment box 3;

[0067] Step 4: Flue gas treatment:

[0068] A. The smoke to be treated is introduced from the smoke inlet 31 on the treatment box 3. The smoke is blocked by the upper partition 331 and the lower partition 332 in the treatment box 3 and flows along an "S"-shaped route;

[0069] B. The flue gas in the treatment box 3 fully contacts and reacts with the water spray and water mist formed by the treatment agent solution to remove dust and other harmful components in the flue gas;

[0070] C. The purified flue gas is discharged through the exhaust port 32 on the processing box 3 and enters the next process;

[0071] Step 5: After the flue gas treatment is completed, the water wheel device 4 is closed.

[0072] The horizontal flue gas purification device in this embodiment uses a water wheel device 4 to lift the treatment agent solution to form water splashes and water mist to fully mix and react with the flue gas, so as to achieve the purpose of removing dust and harmful components such as sulfur and nitrogen in the flue gas; due to the horizontal structure, it is easy to install and maintain, and the construction safety is high; there is no need for high-pressure water supply, low energy consumption, and greatly reduced equipment investment cost and use cost; there is no nozzle structure, and there is no problem of dust clogging the nozzle; by arranging a partition 33 in the treatment box 3 to make the flue gas flow through the treatment box 3 along an "S" shaped route, the travel of the flue gas in the treatment box is increased, the treatment agent solution and the flue gas are fully mixed and reacted, and the absorption and purification effect of pollutants in the flue gas is optimized.

[0073] Example 2

[0074] The horizontal flue gas purification device of this embodiment has the same basic structure as that of embodiment 1, except that: Figure 1 , 4 As shown, the water wheel device 4 includes a motor 44, a main shaft 41 and a plurality of impellers 42 evenly arranged on the main shaft 41, the motor 44 is fixed on the mounting frame 1 outside the solution tank 2, and its output shaft is drivingly connected to one end of the main shaft 41, and the main shaft 41 is rotatably connected to a bearing seat 43 fixed on the mounting frame 1; after the motor 44 is started, the main shaft 41 is driven to rotate, thereby driving the impeller 42 to rotate to achieve the purpose of lifting the treatment agent solution to form water splashes and water mist; the impeller 42 and the partition 33 are alternately arranged, so that the water splashes and water mist can be evenly filled into the flue gas flow path.

[0075] The number of the impellers 42 and the spacing between the impellers 42 can be set according to factors such as the concentration and flow rate of harmful components in the flue gas to be treated. In this embodiment, Figure 1 , 4 As shown, four impellers 42 are evenly arranged on the main shaft 41, and the interval between adjacent impellers 42 is 50 cm, which is suitable for the treatment of small-volume and low-pollution industrial flue gas.

[0076] The horizontal flue gas purification device in this embodiment adopts an impeller 42 to pump water, thereby generating a large amount of water splash and water mist, thereby increasing the contact area between the treatment agent solution and the flue gas, and achieving a good flue gas purification effect and high efficiency. At the same time, a plurality of impellers 42 are coaxially arranged with the same rotation speed to ensure that the water splash and water mist are evenly distributed along the wind direction of the flue gas flow in the treatment box 3, thereby better optimizing the treatment effect.

[0077] Example 3

[0078] The horizontal flue gas purification device of this embodiment has the same basic structure as that of embodiment 2, except that: Figure 1 , 6 As shown, the induced draft fan 6 is also included, and the smoke exhaust port 32 is connected to the induced draft fan 6 through the flue 5. After the induced draft fan 6 is started, it draws air outward, forming a negative pressure in the flue 5 and the treatment box 3, promoting the smoke in the treatment box 3 to enter the induced draft fan 6 through the flue 5, and then be discharged through the air outlet 61 on the induced draft fan 6, thereby increasing the smoke flow in the treatment box 3 and thus improving the treatment efficiency.

[0079] like Figure 1 , 6 As shown, 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 to the control box 7 via connecting wires, and the connecting wires are power wires and signal wires. In this embodiment, the induced draft fan 6 and the motor 44 are variable frequency fans and variable frequency motors, respectively, and the rotation speed can be adjusted by the adjustment module in the control box 7.

[0080] The horizontal flue gas purification device in this embodiment can adjust the speed of the impeller 42 by adjusting the speed of the motor 44 to achieve the function of generating different amounts of water splashes and water mist; when the concentration of harmful components in the flue gas is small or the flue gas flow rate is low, energy saving can be achieved by reducing the speed of the motor 44 to reduce the cost of use; conversely, more water splashes and water mist can be generated by increasing the speed of the motor 44 to achieve the purpose of fully contacting the flue gas with the treatment agent and completely removing the harmful components in the flue gas; in addition, the flue gas flow in the treatment box 3 can be regulated by adjusting the speed of the induced draft fan 6, thereby optimizing the treatment efficiency and purification quality.

[0081] Example 4

[0082] The horizontal flue gas purification device of this embodiment has the same basic structure as any one of Embodiments 1 to 3, except that: Figure 2 As shown, 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, intersecting with the upper partition 331, and fixedly connected to the inner wall of the processing box 3. In this embodiment, the adsorption layer 34 is a perforated plate 341, as shown in FIG. Figure 5As shown, the hole diameter on the orifice plate 341 is 3 mm, and the hole edge spacing is 2 mm, which is not easy to be blocked by dust accumulation.

[0083] After the horizontal flue gas purification device is started, the water splashes and water mist in the treatment box 3 adhere to the orifice plate 341 to form a treatment agent liquid film. After the flue gas enters the treatment box 3, it is blocked by the partition 33 and flows along an "S"-shaped route, repeatedly passing through the orifice plate 341. Therefore, in addition to reacting with the water splashes and water mist in the treatment box 3, the flue gas also fully contacts and reacts with the treatment agent liquid film on the surface of the orifice plate 341, thereby greatly improving the purification efficiency and purification quality of the flue gas. In addition, since the water splashes and water mist raised by the water wheel device 4 continuously clean the orifice plate 341, there will be no dust accumulation on the surface of the orifice plate 341 to block the orifice plate 341, and no manual cleaning is required.

[0084] Example 5

[0085] The horizontal flue gas purification device of this embodiment has the same basic structure as that of embodiment 4, except that: Figure 2 , 3 As shown, the adsorption layer 34 includes a perforated plate 341 and a filler adsorption layer 342 , and the filler adsorption layer 342 is used to increase the purification effect of the adsorption layer 34 .

[0086] The filler adsorption layer 342 is an adsorption filler filled between the upper and lower perforated plates 341. The filler in the filler adsorption layer 342 can be a solid filler with desulfurization and denitrification functions, or it can be a common filler such as pebbles.

[0087] In this embodiment, 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. The surface of the pebbles can adhere to a treatment agent liquid film. When the flue gas passes through the gaps between the pebbles, it can be more fully in contact with the treatment agent, thereby improving the purification capacity of the adsorption layer 34. At the same time, the ability of the pebble layer to remove dust from the flue gas is greatly improved compared to the orifice plate 341. In addition, pebbles are easy to obtain and will not be consumed, and the cost is greatly reduced compared to other fillers.

[0088] like Figure 2 , 3 As shown, the orifice plate 341 and the filler adsorption layer 342 are alternately arranged in the direction of smoke flow. When the smoke flows along the "S"-shaped line, it passes through the orifice plate 341 when flowing downward and passes through the filler adsorption layer 342 when moving upward, so as to prevent dust from entering the upper side of the filler adsorption layer 342 and making it impossible to clean; the filler adsorption layer 342 is used to improve the smoke purification ability of the adsorption layer 34.

[0089] Example 6

[0090] A horizontal flue gas purification device in this embodiment has the same basic structure as that in Embodiment 5, except that the orifice plate 341 and the filler adsorption layer 342 are both wavy or broken line shaped, which can greatly increase the surface area of ​​the orifice plate 341 and the filler adsorption layer 342, thereby increasing the effective adsorption area of ​​the adsorption layer 34 and improving the flue gas purification capability.

[0091] The horizontal flue gas purification device in this embodiment is as follows: Figure 3 As shown, the orifice plate 341 and the filler adsorption layer 342 are both in a broken line shape, and the adsorption capacity is as follows Figure 2 The adsorption layer 34 is about one time larger than the flat plate-shaped adsorption layer 34 in the middle.

[0092] Example 7

[0093] The horizontal flue gas purification device of this embodiment has the same basic structure as any one of Embodiments 1 to 6, except that: Figure 1 , 6 As shown, the solution tank 2 is provided with a drain port 21, a maintenance door 23 and a liquid level box 22, the drain port 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, and the liquid level box 22 is arranged on one side of the upper end of the solution tank 2; a feeding port 35 is arranged on the top of the processing tank 3, and the feeding port 35 is connected to the inside of the processing tank 3.

[0094] After a period of use, the concentration of the active ingredient of the treatment agent solution in the solution tank 2 will decrease, causing the treatment agent solution to become ineffective and generating a large amount of precipitation. After the drain port 21 and the feed port 35 are set, the waste liquid can be regularly discharged through the drain port 21, and new treatment agent solution can be added from the feed port 35 to ensure the flue gas treatment efficiency and purification effect.

[0095] After long-term use, the treatment agent solution in the solution tank 2 is lost, which will cause the liquid level to drop. The addition of treatment agent solution in the middle cannot be accurately controlled, resulting in up and down fluctuations of the treatment agent solution in the solution tank 2, which in turn causes the draft depth of the water wheel device 4 to fluctuate, affecting the amount of water splash and water mist generated. The liquid level box 22 can intuitively monitor the liquid level of the treatment agent solution in the solution tank 2 to avoid the failure of the water wheel device 4 due to the low liquid level and the inability to form water splash and water mist, and the excessive working resistance of the water wheel device 4 due to the high liquid level and the increase in energy consumption.

[0096] The solution tank 2 is provided with a maintenance door 23 at the front side for cleaning the internal space of the solution tank 2 and repairing and replacing the internal parts. The maintenance door 23 is a sealed door to prevent leakage. In normal use, the maintenance door 23 is in a closed and sealed state; after long-term use, a large amount of sludge will be deposited at the bottom of the solution tank 2, which can be cleaned by opening the maintenance door 23; when the water wheel device 4 inside the device is damaged, it can also be replaced and repaired through the maintenance door 23.

[0097] Example 8

[0098] A flue gas purification method, using the horizontal flue gas purification device described in Example 7 to purify flue gas, the specific steps are as follows:

[0099] 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;

[0100] Step 2: Add treatment solution:

[0101] A. Inject the prepared treatment agent solution into the solution tank 2 from the feeding port 35, and ensure that the impeller 42 in the water wheel device 4 is in contact with the solution;

[0102] B. Monitor the liquid level of the treatment agent solution in the solution tank 2 through the liquid level tank 22 to control the draft depth of the impeller 42;

[0103] Step 3: Start the water wheel device:

[0104] A. Start the motor 44 by operating the control box 7. The motor 44 drives the main shaft 41 to rotate, and then drives 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, forming a treatment agent liquid film;

[0105] B. Set the speed of the motor 44 according to the demand to adjust the amount of water splash and water mist generated, and the speed is controlled at 600-1500r / min;

[0106] Step 4: Flue gas treatment:

[0107] A. Start the induced draft fan 6 to extract air, so that negative pressure is formed in the treatment box 3, and the smoke to be treated is introduced from the smoke inlet 31 on the treatment box 3;

[0108] B. After the flue gas enters the treatment box 3, it is initially adsorbed by the perforated plate 341 below the smoke inlet 31 to remove most of the dust and some harmful components in the flue gas;

[0109] C. Then the flue gas passes through each filler adsorption layer 342 and the orifice plate 341 in turn along an "S"-shaped route to remove the remaining dust and harmful components;

[0110] D. Finally, the smoke is discharged into the flue 5 through the smoke exhaust port 32 and blown out through the air outlet 61 of the induced draft fan 6;

[0111] Step 5: After the smoke treatment is completed, the water wheel device 4 and the induced draft fan 6 are turned off.

[0112] The flue gas purification method in this embodiment utilizes the treatment agent water splash and water mist to fully contact with the flue gas to achieve the purpose of fully purifying the flue gas, and improves the flue gas purification capacity by extending the flue gas journey and increasing the adsorption layer 34, so that the flue gas purification efficiency and purification effect are further optimized. This method can be applied to flue gas dust removal, desulfurization and denitrification, and purification of other harmful components, and the flue gas treatment cost is greatly reduced.

[0113] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A horizontal flue gas purification device, characterized in that: include: A solution tank (2) for containing a treatment agent solution; 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); 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); 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; 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); 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; 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); The orifice plate (341) and the filler adsorption layer (342) are both in a wave shape or a broken line shape; The filler adsorption layer (342) is an adsorption filler filled between the upper and lower layers of the orifice plates (341).

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. A horizontal flue gas purification device according to claim 1 or 2, characterized in that: in, 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); 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. A flue gas purification method, characterized in that: The horizontal flue gas purification device described in claim 3 is used to purify flue gas, and the specific steps are as follows: 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; Step 2: Add treatment solution: 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. 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); Step 3: Start 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, 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. 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; Step 4: Flue gas treatment: 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. After the flue gas enters the treatment box (3), it is initially adsorbed by the perforated plate (341) below the smoke inlet (31) to remove most of the dust and some harmful components in the flue gas; 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. 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); 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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