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] This invention relates to the field of flue gas treatment technology, specifically a horizontal flue gas purification device and purification method. Background Technology

[0002] As my country's industrialization accelerates, air pollution has also worsened. Studies show that carbon dioxide emitted during combustion is a major contributor to the greenhouse effect, while sulfur dioxide, nitrogen dioxide, and fly ash particles are also major sources of air pollution. How to eliminate these pollutants is an urgent problem to be solved.

[0003] Currently, the main methods for flue gas desulfurization and denitrification (nitrogen removal) are as follows: 1. Calcium-based absorbent method: Lime powder or lime slurry is sprayed into the flue, reacting with sulfur dioxide to produce sulfates and other particulate matter, which are then collected by a 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 these reactive free radicals to produce sulfuric acid and nitric acid, respectively. The sulfuric acid and nitric acid react with pre-injected ammonia to neutralize the sulfur dioxide and nitrate aerosol particles. 3. Catalyst method: Using copper oxide, aluminum oxide, zinc oxide, etc., to remove sulfur dioxide and nitrogen dioxide.

[0004] In recent years, combined desulfurization and denitrification technology has become the development direction of flue gas treatment. Common desulfurization and denitrification devices in existing technologies are generally vertical treatment towers. Flue gas is passed into the tower and harmful components are absorbed by spray absorbents. However, these treatment towers have the following disadvantages: 1. The vertical structure makes installation and maintenance difficult, and construction safety is poor; 2. The large tower height leads to excessive water supply pressure and high energy consumption; 3. The nozzles are easily clogged by dust in the flue gas; 4. After long-term use, dust in the flue gas easily forms sludge that accumulates inside the tower, affecting the flue gas treatment effect and making cleaning difficult; 5. The flue gas flow rate is small, resulting in low treatment efficiency.

[0005] A search revealed a Chinese patent, authorization announcement number: CN 106000062 B, authorization announcement date: August 21, 2018, which discloses an integrated desulfurization, denitrification, dust removal, and demisting tower. The tower contains a cyclone ion cutting device, with a cylindrical cyclone tube at the top and a cylindrical guide shroud at the bottom. The guide shroud has vertical guide holes evenly distributed along the lower circumference of the shroud. A grid-like mesh surrounds the guide shroud, with the mesh corresponding to the guide holes. The upper end of the cyclone tube extends upwards, passing through the top of the tower and extending outside. A baffle plate is installed between the cyclone tube and the tower. Inside the cyclone tube, from bottom to top, are a sodium alkali solution spray layer and a multi-stage demister. Below the cyclone ion cutting device is a conical regeneration tank, connected to it by a downcomer. The upper end of the downcomer extends into the guide shroud, and the lower end is suspended above the regeneration tank by a support frame. The invention's tower adopts a vertical structure, which makes installation and maintenance difficult and construction safety poor; the large tower height leads to excessive water supply pressure and high energy consumption; the equipment investment cost and operating cost are relatively large; after long-term use, dust in the flue gas is prone to form mud that accumulates in the tower, affecting the flue gas treatment effect and is difficult to clean.

[0006] Furthermore, a Chinese patent, authorization announcement number: CN 106390706 B, authorization announcement date: October 23, 2018, discloses a rain curtain type desulfurization spray tower, including a tank, a pulse stirring water distribution pipe, an oxidation gas distribution pipe, a baffle assembly, a central exhaust pipe assembly, a spiral tower plate assembly, a spray pipe assembly, and a demister. The rain curtain type desulfurization spray tower uses a rain curtain spray structure to wash coal-fired flue gas, eliminating the need for atomizing limestone slurry through spray pipe nozzles. This allows for a moderate reduction in the grinding precision of limestone particles and the outlet pressure of the spray circulation pump, making the spray pipe nozzles less prone to clogging and reducing the energy consumption of the spray circulation pump, thereby lowering the operating cost of the rain curtain type desulfurization spray tower. An oxidation blower delivers the waste gas to a rain curtain-type desulfurization spray tower to isolate the exhaust gas from the coal-fired flue gas after oxidizing calcium sulfite in the limestone slurry. The oxygen content in the coal-fired flue gas at the outlet of the rain curtain-type desulfurization spray tower is low, which does not affect the subsequent wet complexation absorption denitrification process. This solves the process problems of the wet complexation absorption method and promotes the application of low-cost wet complexation absorption. However, this invention has the same drawbacks as the inventions mentioned above. Summary of the Invention

[0007] The technical problem that the invention aims to solve

[0008] To address the problems of existing vertical flue gas treatment towers, such as difficulties in installation and maintenance, poor construction safety, excessive water supply pressure due to tower height, high energy consumption, and high equipment and operating costs, this invention provides a horizontal flue gas purification device and method. It utilizes a water turbine to agitate the treatment agent solution, creating water droplets and mist, allowing the treatment agent solution to fully mix and react with the flue gas, thus optimizing the absorption and purification effect of pollutants in the flue gas. The horizontal structure facilitates easy installation and maintenance, ensuring high construction safety. It eliminates the need for high-pressure water supply, resulting in low energy consumption and significantly reduced equipment and operating costs. The nozzle-free structure eliminates the problem of dust clogging the nozzles. By installing baffles inside the treatment chamber, the flue gas flows through the chamber along an "S"-shaped path, increasing the distance the flue gas travels within the chamber and ensuring thorough mixing and reaction of the treatment agent solution with the flue gas, thereby optimizing the absorption and purification effect of pollutants in the flue gas.

[0009] Technical solution

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

[0011] A horizontal flue gas purification device includes: a solution tank for holding a treatment agent solution; and a treatment tank disposed at the upper end of the solution tank, with an open bottom and vertically connected to the solution tank; the treatment tank is provided with a flue gas inlet and a flue gas outlet, which are respectively located at both ends of the treatment tank; and a water wheel device disposed between the upper opening of the solution tank and the bottom of the treatment tank, for raising the treatment agent solution in the solution tank and forming water droplets and mist to fill the treatment tank; the treatment tank is vertically provided with a plurality of partitions, the partitions including alternating upper partitions and lower partitions, wherein: the upper partitions are sealed to the top and sides of the treatment tank, and a flue gas channel is left between them and the liquid surface of the treatment agent solution in the solution tank; the lower partitions are sealed to the sides of the treatment tank, and a flue gas channel is left at their upper end, and their lower end extends below the liquid surface of the treatment agent solution. By setting up a baffle in the treatment chamber, the flue gas flows through the treatment chamber in an "S" shape. Then, a water wheel device is used to raise the treatment agent solution to form water droplets and water mist, which fills the treatment chamber. This increases the contact area between the flue gas and the treatment agent in the treatment chamber, allowing the treatment agent solution to fully mix and react with the flue gas, thereby optimizing the absorption and purification effect of pollutants in the flue gas.

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

[0013] Furthermore, it also includes an induced draft fan, and the exhaust port is connected to the induced draft fan through a flue for diverting flue gas and adjusting the flue gas flow rate 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 horizontally positioned adsorption layer is provided inside the treatment chamber. This adsorption layer is located at the upper end of the lower partition, intersecting with the upper partition, and is fixedly connected to the inner wall of the treatment chamber. The treatment agent solution adheres to the adsorption layer, forming a liquid film that reacts with the flue gas permeating the adsorption layer, thereby improving the adsorption capacity for harmful components in the flue gas.

[0015] Furthermore, the adsorption layer includes a perforated plate and a packing adsorption layer, which are alternately arranged along the flue gas flow direction, so that the flue gas passes through the perforated plate when flowing downwards and through the packing adsorption layer when moving upwards, thus preventing dust from entering the upper side of the packing adsorption layer and making it impossible to clean; the packing adsorption layer is used to improve the flue gas purification capacity of the adsorption layer.

[0016] Furthermore, both the perforated plate and the packing adsorption layer are wavy or zigzag-shaped, which increases the effective adsorption area of ​​the adsorption layer and improves the flue gas purification capacity.

[0017] Furthermore, the filler adsorption layer consists of an adsorption filler filling between the upper and lower perforated plates.

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

[0019] Furthermore, the solution tank is equipped with a drain outlet, a maintenance door, and a level tank. The drain outlet is located on the lower side of the solution tank and is used to discharge waste liquid and precipitate after the reaction. The maintenance door is located on the front side of the solution tank and is used for cleaning the internal space of the solution tank and for repairing and replacing internal components. The maintenance door is a sealed door to prevent leakage. The level tank is located on the upper side of the solution tank and is connected to the solution tank. The level tank can be used to visually monitor the liquid level of the treatment agent solution in the solution tank to avoid the liquid level being too low or too high.

[0020] The top of the treatment tank is provided with a feeding port, which is connected to the inside of the treatment tank for adding new treatment agent solution.

[0021] A method for purifying flue gas, using the horizontal flue gas purification device described in claim 9, comprises the following steps:

[0022] Step 1: Prepare the treatment agent solution: Prepare a treatment agent solution with appropriate components and concentrations according to the types and contents of harmful components in the flue gas;

[0023] Step 2: Add the treatment solution:

[0024] A. Pour the prepared treatment solution into the solution tank through the feeding port, and ensure that the impeller in the water turbine 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 tank and control the impeller draft.

[0026] Step 3: Start the water turbine system:

[0027] A. Start the motor through the control box. The motor drives the main shaft to rotate, which in turn drives the impeller to rotate, raising water droplets and mist to fill the treatment box. The water droplets and mist adhere to the partitions and adsorption layer inside the treatment box, and penetrate the entire packing adsorption layer to adhere to the surface of the adsorption packing, forming a liquid film of the treatment agent.

[0028] B. Set the motor speed according to the requirements to adjust the amount of water splashes and mist generated. The speed should be controlled between 600 and 1500 r / min.

[0029] Step 4: Flue Gas Treatment

[0030] A. Start the exhaust fan to create negative pressure inside the treatment chamber, and introduce the flue gas to be treated through the flue gas inlet on the treatment chamber.

[0031] B. After entering the treatment box, the flue gas undergoes preliminary adsorption through the perforated plate below the flue gas inlet, removing most of the dust and some harmful components from the flue gas.

[0032] C. Then the flue gas passes through each packing adsorption layer and perforated plate in an “S” shaped path to adsorb and remove the remaining dust and harmful components.

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

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

[0035] Beneficial effects

[0036] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0037] (1) The present invention provides a horizontal flue gas purification device, which uses a water turbine device to raise the treatment agent solution to form water splashes and water mist, so that the treatment agent solution and 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 maintain, and the construction safety is high; no high-pressure water supply is required, the energy consumption is low, and the equipment investment cost and operating cost are greatly reduced; there is no nozzle structure, so there is no problem of dust clogging the nozzle; by setting a baffle in the treatment box, the flue gas flows through the treatment box along an "S" shaped route, which increases the travel distance of the flue gas in the treatment box, so that the treatment agent solution and flue gas are fully mixed and reacted, thereby optimizing the absorption and purification effect of pollutants in the flue gas;

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

[0039] (3) The present invention provides a horizontal flue gas purification device, wherein the water turbine device is driven by a variable frequency motor, and the impeller speed is adjusted by adjusting the motor speed, so as to achieve the function of generating different amounts of water splashes and water mist;

[0040] (4) The horizontal flue gas purification device provided by the present invention also includes an induced draft fan, which can increase the flue gas flow rate in the treatment box by drawing air out of the treatment box, thereby improving the treatment efficiency.

[0041] (5) The present 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 controlled 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 water droplets and water mist in the treatment box adhere to the perforated plate. The flue gas repeatedly passes through the perforated plate and reacts with the water droplets and water mist in the treatment box, as well as with the treatment agent liquid film on the surface of the perforated plate. The purification efficiency and purification quality of the flue gas are greatly improved. In addition, the water droplets and water mist raised by the water wheel device continuously clean the perforated plate, so that the surface of the perforated plate will not accumulate dust and block the perforated plate, and no manual cleaning is required.

[0043] (7) The present invention provides a horizontal flue gas purification device, wherein the adsorption layer includes a perforated plate and a packing adsorption layer, and the packing 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 packing is pebbles, and the surface of the pebbles can be attached with a liquid film of treatment agent. When the flue gas passes through the gaps between the pebbles, it can come into more full 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 from the flue gas is greatly improved compared with that of the perforated plate. In addition, pebbles are easy to obtain and will not be consumed, thus greatly reducing the cost compared with other packing materials.

[0045] (9) The present invention provides a horizontal flue gas purification device in which the perforated plate and the packing adsorption layer are alternately arranged along the flue gas flow direction. When the flue gas flows along the “S” shaped path, it passes through the perforated plate when flowing downward and through the packing adsorption layer when moving upward, thus preventing dust from entering the upper side of the packing adsorption layer and causing it to be impossible to clean.

[0046] (10) The present invention provides a horizontal flue gas purification device in which the perforated plate and the packing adsorption layer are both wavy or zigzag, which can greatly increase the surface area of ​​the perforated plate and the packing 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 equipped with a drain port and a feed port. Waste liquid can be discharged through the drain port periodically, and new treatment agent solution can be added through the feed port to ensure flue gas treatment efficiency and purification effect.

[0048] (12) The present invention provides a horizontal flue gas purification device, wherein a liquid level tank is provided on one side of the solution tank for monitoring the liquid level in the tank. The liquid level tank can be used to directly monitor the liquid level of the treatment agent solution in the solution tank, avoiding the failure of the water turbine device due to the liquid level being too low and the inability to form water splashes and water mist, and the excessive working resistance and energy consumption of the water turbine device due to the liquid level being too high.

[0049] (13) The present invention provides a horizontal flue gas purification device, wherein a maintenance door is provided on the front side of the solution tank for cleaning the internal space of the solution tank and for repairing and replacing 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 multiple solution chambers along the flue gas flow direction, and the solution chambers are separated by partitions. The partitions are aligned with the vertical perforated plate, and different treatment agent solutions can be added to each solution chamber to treat the harmful components in the flue gas separately.

[0051] (15) The present invention provides a flue gas purification method that utilizes water droplets and water mist as treatment agents to fully contact the flue gas in order to achieve the purpose of fully purifying the flue gas. The flue gas purification capacity is improved by extending the flue gas travel and increasing the adsorption layer, thereby further optimizing the flue gas purification efficiency and purification effect. This method can be applied to flue gas dust removal, desulfurization and denitrification, as well as the purification treatment of other harmful components, and the flue gas treatment cost is greatly reduced. Attached Figure Description

[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 this invention;

[0054] Figure 3 A schematic diagram of the zigzag structure of the perforated plate and the packing adsorption layer in this invention;

[0055] Figure 4 A schematic diagram of the water turbine device in this invention;

[0056] Figure 5 A partial structural diagram of the perforated plate in this invention;

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

[0058] In the attached diagram: 1. Mounting frame; 2. Solution tank; 3. Processing tank; 4. Water turbine device; 5. Flue; 6. Exhaust fan; 7. Control box; 21. Drain outlet; 22. Liquid level tank; 23. Maintenance door; 31. Smoke inlet; 32. Smoke outlet; 33. Baffle plate; 34. Adsorption layer; 35. Feed inlet; 41. Main shaft; 42. Impeller; 43. Bearing housing; 44. Motor; 61. Air outlet; 331. Upper baffle plate; 332. Lower baffle plate; 341. Perforated plate; 342. Packing adsorption layer. Detailed Implementation

[0059] To further understand the content of this invention, a detailed description of the invention will be provided 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 for holding a treatment agent solution; and a treatment tank 3, which is located at the upper end of the solution tank 2 and has an open bottom that is vertically connected to the solution tank 2; the treatment tank 3 is provided with a smoke inlet 31 and a smoke outlet 32, which are located at opposite ends of the treatment tank 3; and a water turbine device 4, which is located between the upper opening of the solution tank 2 and the bottom of the treatment tank 3, for raising the treatment agent solution in the solution tank 2 and forming water droplets and mist to fill the treatment tank 3; as shown. Figure 1 , 2 As shown, the processing tank 3 is vertically equipped with several partitions 33. The partitions 33 include alternating upper partitions 331 and lower partitions 332. The upper partitions 331 are sealed to the top and sides of the processing tank 3 and have a flue gas channel between them and the surface of the treatment agent solution in the solution tank 2. The lower partitions 332 are sealed to the sides of the processing tank 3 and have a flue gas channel at their upper end and extend below the surface of the treatment agent solution at their lower end.

[0062] The treatment agent solution contained in the solution tank 2 is an absorbent solution for flue gas desulfurization and denitrification. Other reagents for treating harmful components can also be added to the solution as needed. The flue gas inlet 31 and flue gas outlet 32 ​​on the treatment tank 3 can be set on the top or side of the treatment tank 3, as long as they are located at both ends of the treatment tank 3. The purpose is to maximize the travel distance of the flue gas from the flue gas inlet 31 to the flue gas outlet 32, thereby ensuring that the flue gas has sufficient reaction time with the treatment agent solution, so that the harmful components in the flue gas are treated more thoroughly. The water turbine device 4 consists of a rotating impeller or a roller with treaded protrusions on the surface (such as a roller shaped like a car tire), as well as a power device and transmission mechanism to drive its rotation.

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

[0064] Step 1: Prepare the treatment agent solution: Prepare a treatment agent solution with appropriate components and concentrations according to the types and contents of harmful components in the flue gas;

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

[0066] Step 3: Start the water turbine device 4. The water turbine device 4 rotates and raises the treatment agent solution to form water droplets and water mist, filling the treatment tank 3.

[0067] Step 4: Flue Gas Treatment

[0068] A. The flue gas to be treated is introduced into the flue gas through the flue gas inlet 31 on the treatment box 3. The flue gas flows along an “S” shaped route in the treatment box 3, blocked by the upper baffle 331 and the lower baffle 332.

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

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

[0071] Step 5: After the flue gas treatment is completed, shut down the water turbine device 4.

[0072] The horizontal flue gas purification device in this embodiment utilizes a water turbine device 4 to agitate the treatment agent solution, forming water droplets and mist that fully mix and react with the flue gas to remove dust and harmful components such as sulfur and nitrogen from the flue gas. Due to its horizontal structure, installation and maintenance are easy, and construction safety is high. It requires no high-pressure water supply, resulting in low energy consumption and significantly reduced equipment investment and operating costs. The nozzle-free structure eliminates the problem of dust clogging the nozzles. By installing a baffle 33 inside the treatment chamber 3, the flue gas flows through the chamber along an "S"-shaped path, increasing the distance the flue gas travels within the chamber and ensuring thorough mixing and reaction between the treatment agent solution and the flue gas, thus optimizing the absorption and purification effect of pollutants in the flue gas.

[0073] Example 2

[0074] This embodiment of a horizontal flue gas purification device has the same basic structure as Embodiment 1, but the differences and improvements are as follows: Figure 1 , 4 As shown, the water turbine device 4 includes a motor 44, a main shaft 41, and several impellers 42 evenly arranged on the main shaft 41. The motor 44 is fixed on the mounting bracket 1 outside the solution tank 2, and its output shaft is connected to one end of the main shaft 41. The main shaft 41 is rotatably connected to the bearing seat 43 fixed on the mounting bracket 1. After the motor 44 starts, it drives the main shaft 41 to rotate, thereby driving the impellers 42 to rotate to achieve the purpose of raising the treatment agent solution to form water splashes and water mist. The impellers 42 and the baffle 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 impellers 42 and the spacing between them can be set according to factors such as the concentration and flow rate of the harmful components in the flue gas to be treated. In this embodiment, for example... Figure 1 , 4 As shown, four impellers 42 are evenly arranged on the main shaft 41, with a spacing of 50cm between adjacent impellers 42, which is suitable for the treatment of small-volume, low-pollution industrial flue gas.

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

[0077] Example 3

[0078] This embodiment of a horizontal flue gas purification device has the same basic structure as Embodiment 2, but the differences and improvements are as follows: Figure 1 , 6 As shown, it also includes an induced draft fan 6, and the exhaust port 32 is connected to the induced draft fan 6 through the flue 5. After the induced draft fan 6 starts, it draws air outward, creating a negative pressure in the flue 5 and the treatment box 3, which promotes the flue gas in the treatment box 3 to enter the induced draft fan 6 through the flue 5, and then be discharged through the exhaust port 61 on the induced draft fan 6, thereby increasing the flue gas flow rate 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 bracket 1. The induced draft fan 6 and the motor 44 are connected to the control box 7 via connecting cables, which are power cables and signal cables. In this embodiment, the induced draft fan 6 and the motor 44 are a variable frequency fan and a variable frequency motor, respectively, and their speeds can be adjusted by an adjustment module inside 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 generate different amounts of water droplets and water mist. When the concentration of harmful components in the flue gas is low or the flue gas flow rate is low, energy saving and lower operating costs can be achieved by reducing the speed of the motor 44. Conversely, the speed of the motor 44 can be increased to generate more water droplets and water mist, so as to achieve the purpose of fully contacting the flue gas with the treatment agent and thoroughly removing the harmful components in the flue gas. In addition, the flow rate of the flue gas in the treatment box 3 can be controlled by adjusting the speed of the induced draft fan 6, thereby optimizing the treatment efficiency and purification quality.

[0081] Example 4

[0082] This embodiment of a horizontal flue gas purification device has the same basic structure as any of embodiments 1 to 3, with the following differences and improvements: Figure 2 As shown, a horizontally positioned adsorption layer 34 is provided inside the processing chamber 3. The adsorption layer 34 is located above the lower partition 332, intersecting with the upper partition 331, and is fixedly connected to the inner wall of the processing chamber 3. In this embodiment, the adsorption layer 34 is a perforated plate 341, as shown... Figure 5As shown, the orifice plate 341 has a hole diameter of 3mm and a hole edge spacing of 2mm, which makes it less prone to dust accumulation and clogging.

[0083] After the horizontal flue gas purification device is started, the water droplets and mist in the treatment box 3 adhere to the perforated plate 341, forming a liquid film of the treatment agent. After the flue gas enters the treatment box 3, it is blocked by the baffle 33 and flows along an "S"-shaped route, repeatedly passing through the perforated plate 341. Therefore, in addition to reacting with the water droplets and mist in the treatment box 3, the flue gas also fully contacts and reacts with the liquid film of the treatment agent on the surface of the perforated plate 341, greatly improving the purification efficiency and purification quality of the flue gas. In addition, because the water droplets and mist raised by the water wheel device 4 continuously clean the perforated plate 341, the surface of the perforated plate 341 will not accumulate dust and block the perforated plate 341, eliminating the need for manual cleaning.

[0084] Example 5

[0085] This embodiment of a horizontal flue gas purification device has the same basic structure as Embodiment 4, but the differences and improvements are as follows: Figure 2 , 3 As shown, the adsorption layer 34 includes a perforated plate 341 and a filler adsorption layer 342, which is used to increase the purification effect of the adsorption layer 34.

[0086] The packing adsorption layer 342 consists of two perforated plates 341 with adsorption packing material between them. The packing material in the packing adsorption layer 342 can be a solid packing material with desulfurization and denitrification functions, or it can be a common packing material such as pebbles.

[0087] In this embodiment, the thickness of the adsorption layer 342 is 3-5 cm, and the adsorption filler is a pebble with a particle size of 5-10 mm. The surface of the pebble can be coated with a liquid film of the treatment agent. When the flue gas passes through the gaps between the pebbles, it can come into more full contact with the treatment agent, thereby improving the purification capacity of the adsorption layer 34. At the same time, the pebble layer has a much higher ability to remove dust from the flue gas than the perforated plate 341. In addition, pebbles are easy to obtain and will not be consumed, which greatly reduces the cost compared with other fillers.

[0088] like Figure 2 , 3 As shown, the perforated plate 341 and the packing adsorption layer 342 are alternately arranged along the flue gas flow direction. During the flow of flue gas along the "S"-shaped path, it passes through the perforated plate 341 when flowing downwards and through the packing adsorption layer 342 when moving upwards, preventing dust from entering the upper side of the packing adsorption layer 342 and thus making it impossible to clean; the packing adsorption layer 342 is used to improve the flue gas purification capacity of the adsorption layer 34.

[0089] Example 6

[0090] The horizontal flue gas purification device of this embodiment has the same basic structure as that of embodiment 5. The difference and improvement is that the perforated plate 341 and the packing adsorption layer 342 are both wavy or zigzag-shaped. This can greatly increase the surface area of ​​the perforated plate 341 and the packing adsorption layer 342, thereby increasing the effective adsorption area of ​​the adsorption layer 34 and improving the flue gas purification capacity.

[0091] The horizontal flue gas purification device in this embodiment, such as Figure 3 As shown, both the perforated plate 341 and the packing adsorption layer 342 are zigzag-shaped, and their adsorption capacity is as follows: Figure 2 The adsorption layer in the middle is about one-third the size of the plate-shaped adsorption layer 34.

[0092] Example 7

[0093] This embodiment of a horizontal flue gas purification device has the same basic structure as any one of embodiments 1 to 6, with the following differences and improvements: Figure 1 , 6 As shown, the solution tank 2 is provided with a drain port 21, a maintenance door 23 and a liquid level tank 22. The drain port 21 is located on the lower side of the solution tank 2, the maintenance door 23 is located on the front side of the solution tank 2, and the liquid level tank 22 is located on the upper side of the solution tank 2. The top of the processing tank 3 is provided with a feeding port 35, which communicates with the interior of the processing tank 3.

[0094] After a period of use, the concentration of the effective components in the treatment agent solution in solution tank 2 will decrease, causing the treatment agent solution to become ineffective and generating a large amount of sediment. After setting up the drain port 21 and the feed port 35, the waste liquid can be discharged through the drain port 21 periodically, and new treatment agent solution can be added through the feed port 35 to ensure the flue gas treatment efficiency and purification effect.

[0095] After prolonged use, the treatment agent solution in solution tank 2 will be depleted, causing the liquid level to drop. Adding treatment agent solution midway through the process is difficult to control precisely, resulting in fluctuations in the solution level within tank 2. This, in turn, causes fluctuations in the draft of the water turbine device 4, affecting the amount of water spray and mist generated. Setting up a level tank 22 allows for direct monitoring of the treatment agent solution level in tank 2, preventing the water turbine device 4 from malfunctioning due to excessively low levels, thus preventing the formation of water spray and mist, and preventing the water turbine device 4 from experiencing excessively high levels, leading to excessive operating resistance and increased energy consumption.

[0096] A maintenance door 23 is provided on the front side of the solution tank 2 for cleaning the internal space and repairing or replacing internal components. The maintenance door 23 is a sealed door to prevent leakage. Under normal use, the maintenance door 23 is in a closed and sealed state. After long-term use, a large amount of sludge will accumulate at the bottom of the solution tank 2, which can be cleaned by opening the maintenance door 23. When the water turbine 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, comprises the following specific steps:

[0099] Step 1: Prepare the treatment agent solution: Prepare a treatment agent solution with appropriate components and concentrations according to the types and contents of harmful components in the flue gas;

[0100] Step 2: Add the treatment solution:

[0101] A. Pour the prepared treatment solution into the solution tank 2 through the feed port 35, and ensure that the impeller 42 in the water turbine 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 and control the water depth of the impeller 42;

[0103] Step 3: Start the water turbine system:

[0104] A. Start the motor 44 by operating the control box 7. The motor 44 drives the main shaft 41 to rotate, which in turn drives the impeller 42 to rotate, raising water droplets and water mist to fill the treatment box 3. The water droplets and water mist adhere to the partition 33 and adsorption layer 34 inside the treatment box 3, and penetrate the entire packing adsorption layer 342 to adhere to the surface of the adsorption packing, forming a treatment agent liquid film.

[0105] B. Set the motor speed to 44 according to the requirements to adjust the amount of water splashes and mist generated, and control the speed between 600 and 1500 r / min.

[0106] Step 4: Flue Gas Treatment

[0107] A. Start the induced draft fan 6 to draw out the air, so that a negative pressure is formed in the treatment box 3, and introduce the flue gas to be treated from the flue gas inlet 31 on the treatment box 3.

[0108] B. After the flue gas enters the treatment box 3, it undergoes preliminary adsorption through the perforated plate 341 below the flue gas inlet 31 to remove most of the dust and some harmful components from the flue gas.

[0109] C. Then the flue gas passes through each packing adsorption layer 342 and perforated plate 341 in an “S” shaped path to adsorb and remove the remaining dust and harmful components.

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

[0111] Step 5: After the flue gas treatment is completed, shut down the water turbine device 4 and the induced draft fan 6.

[0112] The flue gas purification method in this embodiment utilizes water droplets and water mist as treatment agents to fully contact the flue gas, thereby achieving the purpose of fully purifying the flue gas. The flue gas purification capacity is improved by extending the flue gas travel distance and increasing the adsorption layer 34, further optimizing the flue gas purification efficiency and effect. This method can be applied to flue gas dust removal, desulfurization, denitrification, and purification of other harmful components, significantly reducing the cost of flue gas treatment.

[0113] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A horizontal flue gas purification device, characterized in that, include: Solution tank (2), which is used to hold treatment agent solution; The processing tank (3) is located at the upper end of the solution tank (2) and has an open bottom that is vertically connected to the solution tank (2); the processing tank (3) is provided with a smoke inlet (31) and a smoke outlet (32), which are located at the two ends of the processing tank (3), respectively. A water turbine device (4) is installed between the upper opening of the solution tank (2) and the bottom of the treatment tank (3) to lift the treatment agent solution in the solution tank (2) and form water splashes and water mist to fill the treatment tank (3); The processing tank (3) is vertically provided with several partitions (33). The partitions (33) include alternating upper partitions (331) and lower partitions (332). The upper partitions (331) are sealed to the top and sides of the processing tank (3) and have a flue gas channel between them and the liquid surface of the treatment agent solution in the solution tank (2). The lower partitions (332) are sealed to the sides of the processing tank (3) and have a flue gas channel at their upper end and extend below the liquid surface of the treatment agent solution at their lower end.

2. The horizontal flue gas purification device according to claim 1, characterized in that: The water turbine device (4) includes a motor (44), a main shaft (41), and several impellers (42) evenly arranged on the main shaft (41). The motor (44) is fixed on the mounting bracket (1) outside the solution tank (2), and its output shaft is connected to one end of the main shaft (41). The main shaft (41) is rotatably connected to the bearing seat (43) fixed on the mounting bracket (1). The impellers (42) and the partition plate (33) are alternately arranged.

3. The horizontal flue gas purification device according to claim 2, characterized in that: It also includes an induced draft fan (6), and the exhaust port (32) is connected to the induced draft fan (6) through the flue (5); the motor (44) and the induced draft fan (6) are controlled by a control box (7) fixed on the mounting frame (1).

4. The horizontal flue gas purification device according to claim 1, characterized in that: The processing box (3) is provided with a horizontal adsorption layer (34). The adsorption layer (34) is located on 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).

5. A horizontal flue gas purification device according to claim 4, characterized in that: The adsorption layer (34) includes a perforated plate (341) and a packing adsorption layer (342), which are alternately arranged along the flue gas flow direction.

6. A horizontal flue gas purification device according to claim 5, characterized in that: Both the perforated plate (341) and the filler adsorption layer (342) are wavy or zigzag-shaped.

7. A horizontal flue gas purification device according to claim 5, characterized in that: The filler adsorption layer (342) is formed by filling the space between the upper and lower perforated plates (341) with adsorption filler.

8. A horizontal flue gas purification device according to claim 7, characterized in that: The thickness of the filler adsorption layer (342) is 3-5 cm, and the adsorption filler is a pebble with a particle size of 5-10 mm.

9. A horizontal flue gas purification device according to any one of claims 1 to 8, characterized in that: in, The solution tank (2) is provided with a drain port (21), a maintenance door (23) and a level tank (22). The drain port (21) is located on the lower side of the solution tank (2), the maintenance door (23) is located on the front side of the solution tank (2), and the level tank (22) is located on the upper side of the solution tank (2). The processing box (3) is provided with a feeding port (35) on the top, and the feeding port (35) is connected to the inside of the processing box (3).

10. A method for purifying flue gas, characterized in that, The specific steps for purifying flue gas using the horizontal flue gas purification device described in claim 9 are as follows: Step 1: Prepare the treatment agent solution: Prepare a treatment agent solution with appropriate components and concentrations according to the types and contents of harmful components in the flue gas; Step 2: Add the treatment solution: A. Pour the prepared treatment solution into the solution tank (2) through the feed port (35) and ensure that the impeller (42) in the water turbine device (4) is in contact with the solution; B. Monitor the liquid level of the treatment agent solution in the solution tank (2) through the liquid level tank (22) and control the water depth of the impeller (42); Step 3: Start the water turbine system: A. Start the motor (44) by operating the control box (7). The motor (44) drives the main shaft (41) to rotate, which in turn drives the impeller (42) to rotate, raising water droplets and water mist to fill the treatment box (3). The water droplets and water mist adhere to the partition (33) and adsorption layer (34) inside the treatment box (3), and penetrate the entire packing adsorption layer (342) to adhere to the surface of the adsorption packing, forming a treatment agent liquid film. B. Set the motor (44) speed according to the requirements to adjust the amount of water splash and water mist generated. The speed is controlled between 600 and 1500 r / min. Step 4: Flue Gas Treatment A. Start the induced draft fan (6) to draw out the air, so that a negative pressure is formed in the treatment box (3), and introduce the flue gas to be treated from the flue gas inlet (31) on the treatment box (3); B. After the flue gas enters the treatment box (3), it undergoes preliminary adsorption through the perforated plate (341) below the flue gas inlet (31) to remove most of the dust and some harmful components from the flue gas. C. Then the flue gas passes through each packing adsorption layer (342) and perforated plate (341) in an "S" shaped path to adsorb and remove the remaining dust and harmful components. D. Finally, the flue gas is discharged into the flue (5) through the exhaust port (32) and blown out through the air outlet (61) of the induced draft fan (6); Step 5: After the flue gas treatment is completed, shut down the water turbine device (4) and the induced draft fan (6).

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