Tail gas purification treatment device for incinerator

Abstract

The tail gas purification treatment device comprises a spray tower, a filter box, a gas absorption box and an exhaust funnel, two-stage packing is installed in the spray tower, a gas inlet pipeline, a water outlet and a circulating water tank are arranged on the two sides of the spray tower and located below the two-stage packing respectively, an induced draft fan is installed on the gas inlet pipeline, and a water outlet is installed on the water outlet. The upper end of the circulating water tank is communicated to circulating water pipes located above the two-stage filler on the spray tower through a circulating pump, each circulating water pipe is provided with an online flowmeter and a plurality of rotary nozzles, the upper end of the circulating water tank is provided with an online thermometer, an online PH value detector and a water inlet, and the top of the spray tower is connected with an air inlet of a filter tank through an air outlet pipeline; a water outlet of the filter box is communicated to the water inlet, a gas outlet of the filter box is connected to a gas inlet of the gas absorption box, the gas absorption box is connected to the lower part of the exhaust funnel through an exhaust pipeline, and an online gas detector is mounted on the exhaust pipeline; the device has the advantages of being good in treatment effect, green, environment-friendly and high in treatment efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of tail gas purification treatment, and particularly relates to a tail gas purification treatment device for an incinerator. Background Art

[0002] With the development of society and the steady improvement of residents' living standards, people have higher and higher requirements for the environment. Subsequently, the output of domestic waste and industrial waste has increased sharply, such as the phosphate mixed solution generated in the production process of glyphosate. With the development of the glyphosate industry, the production efficiency of glyphosate has been gradually improved. However, while the output of glyphosate has also increased steadily, a large amount of phosphate mixed solution has been produced. Currently, there are mainly three ways to deal with the phosphate mixed solution: one is recycling and using it as a water agent for glyphosate preparation; the second is to build tanks for temporary storage and sell it to a third-party company for unified treatment later; the third is to concentrate it and then burn it in an incinerator to prepare other phosphate products, such as sodium pyrophosphate and sodium metaphosphate.

[0003] At present, the third method is the main way for domestic glyphosate enterprises to deal with the phosphate mixed solution. However, when the phosphate mixed solution is concentrated and then burned in an incinerator, a large amount of tail gas will be generated during the process of burning garbage. Direct emission will cause serious pollution to the atmosphere, so it needs to be purified before emission. The incineration tail gas contains dust and sulfide gases, and the treatment is relatively difficult. The existing incinerator tail gas purification treatment devices have problems such as blockage of the filter screen due to long-term filtration, difficult maintenance and cleaning, incomplete tail gas treatment with residues remaining, imperfect gas detection equipment, and low degree of information automation, which have a certain impact on the purification treatment effect of the incineration tail gas.

[0004] In order to solve the above problems in the process of incinerator tail gas purification treatment, it has become particularly important to improve the incinerator tail gas purification treatment device, so as to improve the incineration tail gas treatment efficiency, reduce the maintenance difficulty of the treatment device, and jointly build a beautiful homeland. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a tail gas purification treatment device for an incinerator with good treatment effect, environmental friendliness and high treatment efficiency.

[0006] The object of the present utility model is achieved as follows: An exhaust gas purification and treatment device for an incinerator, including a spray tower, further including a filter box, a gas absorption box and an exhaust pipe. Two stages of packing are installed in the spray tower. On both sides of the spray tower, below the two stages of packing, an intake pipe, a water outlet and a circulation water tank are respectively provided. An induced draft fan is installed on the intake pipe. The upper end of the circulation water tank is connected to a circulation water pipe above the two stages of packing on the spray tower through a circulation pump. Above the two stages of packing on the circulation water pipe, a plurality of rotating spray heads are installed. On the circulation water pipe outside the spray tower, an on-line flow meter is installed. On the upper end of the circulation water tank, an on-line thermometer, an on-line pH value detector and a water inlet are further provided. The top of the spray tower is connected to an air inlet on one side of the filter box through an air outlet pipe. A water discharge port at the lower end of the filter box is communicated with the water inlet. An air outlet on the other side of the filter box is connected to an air inlet at the upper part on one side of the gas absorption box. The gas absorption box is connected to the lower part of the exhaust pipe through an exhaust pipe at the lower part on the other side of it. An on-line gas detector is installed on the exhaust pipe.

[0007] Preferably, the packing type of the two stages of packing is Raschig ring, and the material is polyvinyl chloride.

[0008] Preferably, control valves are respectively installed at positions on the intake pipe close to the spray tower, positions on the circulation water pipe close to the spray tower, the outlet position of the circulation pump, the water inlet, the air inlet, the air outlet, the water discharge port, the air inlet, and positions on the exhaust pipe close to the gas absorption box and the exhaust pipe. The flow of each control valve is controlled by a remote control system.

[0009] Preferably, an on-line liquid level gauge is installed on the side of the circulation water tank. The detection results of the on-line thermometer, the on-line pH value detector, the on-line liquid level gauge, the on-line flow meter and the on-line gas detector are all fed back to the remote control system.

[0010] Preferably, the filter box is in a cuboid shape, with filter cotton installed inside, and the upper end is a detachable cover plate.

[0011] Preferably, the gas absorption box is in a cuboid shape, with activated carbon installed inside, and the shape of the activated carbon is a porous cube.

[0012] Preferably, two observation ports are correspondingly provided on one side of the two stages of packing on the spray tower.

[0013] Due to the above technical solutions, the beneficial effects of the present utility model are as follows: The present utility model uses a two-stage packing spray tower, a filter box and a gas absorption box to treat the tail gas of the incinerator in sequence, and the tail gas treatment is more thorough and complete; The present utility model uses a circulating water tank, a circulating pump, a circulating water pipe and two rotating spray heads located directly above the two-stage packing, which further effectively ensures the spray treatment effect while being conducive to saving water resources. At the same time, an on-line gas detector is used to analyze the gas on-line to ensure that the gas emissions meet the standards, which is green and environmentally friendly; The present utility model uses an on-line flow meter, an on-line thermometer, an on-line pH value detector and an on-line gas detector to automatically detect the treatment effect, effectively improving the treatment efficiency; Generally speaking, the present utility model has the advantages of good treatment effect, green environmental protection and high treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the composition of the present utility model.

[0015] In the figure: 1, intake pipe; 2, induced draft fan; 3, water outlet; 4, observation port; 5, packing; 6, rotating spray head; 7, spray tower; 8, outlet pipe; 9, circulating water pipe; 10, on-line flow meter; 11, on-line thermometer; 12, circulating pump; 13, on-line pH value detector; 14, water inlet; 15, circulating water tank; 16, on-line liquid level gauge; 17, air inlet; 18, filter box; 19, air outlet; 20, water discharge port; 21, gas inlet; 22, gas absorption box; 23, on-line gas detector; 24, exhaust stack; 25, exhaust pipe; 26, control valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions of the present utility model will be further specifically described below in conjunction with the accompanying drawings.

[0017] As Figure 1 shown, the purpose of the present utility model is to provide a tail gas purification treatment device for an incinerator, which is mainly used to solve the problems of incomplete tail gas treatment, residues, imperfect gas detection equipment, filter screen blockage, difficult maintenance and cleaning, and low information automation degree during the purification treatment of incinerator tail gas.

[0018] The present utility model is used for the purification treatment of the incinerator tail gas to achieve the purpose that the discharged gas after purification treatment meets the atmospheric emission requirements. The main body of the device is a spray tower 7, which is mainly provided with an air inlet (i.e., the intake pipe 1), an air outlet (i.e., the outlet pipe 8), two circulation ports (i.e., two circulating water pipes 9) and two observation ports 4. Among them, the air inlet is located on one side below the tower body of the spray tower 7, and the air outlet is located at the top of the tower.

[0019] The tower body of the described spray tower 7 is installed with two - stage packing 5, namely upper and lower two - stage packing 5. Above each stage of packing 5, a plurality of rotary nozzles 6 are installed for evenly spraying the leaching solution. The type of packing 5 is Raschig ring, and the material is polyvinyl chloride.

[0020] The material of the tower body and its pipelines of the described spray tower 7 is pp or pe, preferably pp material. The connection between its tower body and the flange for external connection is by welding.

[0021] The described air inlet is connected to the intake pipeline 1 by a pp flange. The intake pipeline 1 introduces gas into the spray tower 7 under the action of a large - scale induced draft fan 2, and control valves 26 are installed on the pipeline near the air inlet.

[0022] On one side of the described spray tower 7 is a circulation water tank 15. The circulation water tank 15 is respectively provided with a water inlet 14, a water outlet 3 (located on one side below the air inlet of the spray tower 7), and a circulation port (i.e., the position of the circulation pump 12). Among them, the water inlet 14, the water outlet 3, and the circulation port are all connected with control valves, which is convenient for the replacement and supplement of the leaching solution and the adjustment of the spray flow rate.

[0023] An on - line pH value detector 13, an on - line thermometer 11 are installed above the described circulation water tank 15, and an on - line liquid level gauge 16 is installed on the side of the water tank. The detection and analysis results of the three are transmitted to the remote control system.

[0024] Above the described circulation water tank 15 is a circulation pump 12. The circulation pump 12 is connected to a circulation pipeline. The circulation pipeline branches out two pipelines which are respectively connected to the circulation ports (i.e., the circulation water pipes 9) on the spray tower 7. Control valves 26 and on - line flow meters 10 are installed on both circulation water pipes 9, and rotary nozzles 6 are installed at the end of the pipeline. The flow detection results of the on - line flow meters 10 are fed back to the remote control system.

[0025] The top of the described scrubbing tower 7 is an air outlet, and the air outlet is connected to an outlet pipeline 8. The connection method is by flange connection, and the flange is fixed by screws.

[0026] The outlet pipeline 8 of the described scrubbing tower 7 is connected to a filter box 18. The filter box 18 is rectangular, and filter cotton is installed inside. On both sides of the filter box 18 are air inlets 17 and air outlets 19, and below is provided with a water discharge port 20. A control valve 26 and a pipeline are installed at the water discharge port 20. The pipeline is connected to the circulation water tank 15, and the accumulated water enters the circulation water tank 15 for continuous recycling, saving water resources.

[0027] The material of the described filter box 18 is pp material, and above is a cover plate. The fixing method is by screw fixation, which is convenient for disassembly and maintenance.

[0028] The air outlet 19 of the described filter box 18 is connected to the gas absorption box 22. The gas absorption box 22 is cuboid-shaped, with a support frame at the bottom. Its air inlet (i.e., the air inlet 21) is located above one side of the gas absorption box 22, and its air outlet is located on the other side of the gas absorption box 22. Its air outlet is connected to the exhaust pipe 25. An on-line gas detector 23 is installed on the exhaust pipe 25, which can perform on-line measurement and transmit the measurement results to the remote control system. The exhaust pipe 25 is connected to the exhaust stack 24.

[0029] Activated carbon is installed inside the described gas absorption box 22, and the shape of the activated carbon is a porous cube.

[0030] The tail gas to be treated passes through the two-stage spraying of the spray tower 7, the treatment of the filter box 18, and the treatment of the gas absorption box 22 in this device, and the tail gas treatment is more thorough and complete.

[0031] After the above installation is completed, the present utility model can be put into use. The tail gas coming out of the incinerator enters the spray tower 7 through the intake pipe 1. During the upward movement of the tail gas, it is subjected to the spraying treatment of the leaching liquid by the two-stage packing 5, and then enters the filter box 18 through the air outlet pipe 8 for filtering cotton filtration treatment, and then enters the gas absorption box 22 for activated carbon absorption treatment. The treated clean gas is finally discharged into the atmosphere from the exhaust stack 24; during this period, the accumulated water in the filter box 18 returns to the circulation water tank 15 for repeated use, and the leaching liquid in the circulation water tank 15 returns to the rotary nozzle 6 through the circulation pump 12 for repeated use.

[0032] In summary, the present utility model can effectively solve problems such as the blockage of the filter screen, the difficulty in maintaining cleanliness, the incomplete treatment and residue of the tail gas, the imperfect gas detection equipment, and the low degree of information automation during the purification treatment of the incinerator tail gas. It reduces the on-site manual operation and analysis and determination, the operation is safer, the analysis is more accurate, it saves labor, has a high degree of automation, the processing data feedback is timely, and the purification treatment efficiency of the incinerator tail gas is greatly improved.

[0033] The on-line pH detector, on-line thermometer, on-line liquid level gauge installed on the circulation water tank 15 and the on-line gas detector on the air outlet pipe are all connected to the remote control system, which can be remotely controlled, the control is more precise, problems can be solved, the reaction time is short, it reduces the manual analysis and determination, saves labor, and has a high degree of information automation.

[0034] The materials used for the tower body and its pipelines of the spray tower 7 are pp or pe, preferably pp material. The connection between the tower body and the flange is by welding. The selected materials are common, cheap, corrosion-resistant, and convenient for maintenance, repair, and welding.

[0035] The described incinerator tail gas purification and treatment device uses multiple methods such as a spray tower 7, a filter box 18, and a gas absorption box 22 for multi-stage treatment of the tail gas. The spray tower 7 adopts two-stage spraying, and the tail gas purification and treatment effect is better and more thorough.

[0036] The filter box 18 of this device is made of pp material. The fixing method of the upper cover plate is screw fixing, and the inside is filter cotton, which is convenient to disassemble and easy to maintain.

[0037] The gas absorption box 22 described is installed with activated carbon inside. The shape of the activated carbon is a porous cube, with sufficient gas contact, good absorption effect, and the activated carbon can be recycled.

[0038] The described circulating water tank 15 is respectively provided with a water inlet 14, a water outlet 3, and a circulation port, all of which are connected to control valves 26, facilitating the replacement and supplement of the shower liquid and the adjustment of the spray flow rate.

[0039] The device exhaust pipe 25 of the described device is installed with an on-line gas detector 23, which can perform on-line measurement, on-line analysis of the gas, and can be remotely monitored to ensure that the gas emissions meet the standards.

[0040] The above description is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tail gas purification device for an incinerator, comprising a spray tower, characterized in that: The invention also includes a filter box, a gas absorption box and an exhaust pipe. Two-stage fillers are installed in the spray tower. Air inlet pipes, water outlets and circulating water tanks are respectively provided on both sides of the spray tower below the two-stage fillers. An induced draft fan is installed on the air inlet pipe. The upper end of the circulating water tank is connected to the circulating water pipe located above the two-stage fillers on the spray tower through a circulating pump. A plurality of rotating nozzles are installed on the circulating water pipe just above the two-stage fillers. An online flow meter is installed on the circulating water pipe outside the spray tower. An online thermometer, an online pH value detector and a water inlet are also provided on the upper end of the circulating water tank. The top of the spray tower is connected to the air inlet on one side of the filter box through an air outlet pipe. The drain port at the lower end of the filter box is connected to the water inlet. The air outlet on the other side of the filter box is connected to the air inlet on the upper part of one side of the gas absorption box. The gas absorption box is connected to the lower part of the exhaust pipe through the exhaust pipe located at the lower part of the other side thereof. An online gas detector is installed on the exhaust pipe.

2. The exhaust gas purification device for an incinerator according to claim 1, characterized in that: The two-stage filler is of theta ring type and is made of polyvinyl chloride.

3. The tail gas purification device for an incinerator according to claim 1, characterized in that: Control valves are installed at the position of the air intake pipe close to the spray tower, the position of the circulating water pipe close to the spray tower, the outlet of the circulating pump, the water inlet, the air inlet, the air outlet, the drain port, the air inlet, and the positions of the exhaust pipe close to the gas absorption box and the exhaust pipe respectively, and the flow of each control valve is controlled by a remote control system.

4. The tail gas purification device for an incinerator according to claim 1, characterized in that: An online liquid level meter is installed on the side of the circulating water tank, and the detection results of the online thermometer, the online pH value detector, the online liquid level meter, the online flow meter and the online gas detector are all fed back to the remote control system.

5. The tail gas purification device for an incinerator according to claim 1, characterized in that: The filter box is in the shape of a rectangular parallelepiped, with filter cotton installed inside and a detachable cover plate at the upper end.

6. The tail gas purification device for an incinerator according to claim 1, characterized in that: The gas absorption box is in the shape of a rectangular parallelepiped, and activated carbon is installed inside, and the activated carbon is in the shape of a porous cube.

7. The tail gas purification device for an incinerator according to claim 1, characterized in that: Two observation ports are correspondingly arranged on one side of the spray tower and located at the two-stage filler.

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