Deacidification tower for hazardous waste incineration

Abstract

The utility model relates to a deacidification tower for hazardous waste incineration, which belongs to the technical field of deacidification towers and comprises a base and a deacidification barrel fixed at the top of the base, an air inlet component for deacidification is arranged on the outer side of the deacidification barrel, and an exhaust component for filtering waste gas is arranged in the deacidification barrel. The gas inlet assembly comprises an annular gas inlet pipe fixed at the bottom of the deacidification barrel, and a plurality of gas guide pipes are uniformly fixed at the top of the annular gas inlet pipe. According to the deacidification tower for hazardous waste incineration, filter cotton with a deacidification agent is placed in a gas guide pipeline to primarily adsorb flue gas flowing through the gas guide pipe, the flue gas is dispersed through gas holes in the surface of a gas outlet barrel and discharged into neutralization liquid in a deacidification barrel, and the flue gas is lifted to the position below an isolation bottom plate after being treated by the neutralization liquid; after neutralization liquid is sprayed out of the atomization spraying head for secondary treatment, flue gas enters the position above the isolation bottom plate, is discharged after being adsorbed by the filter cotton with alkaline particles, is smoothly discharged after being dried by the gas outlet pipe, the deacidification effect and efficiency are improved, and residues are avoided.

Description

Technical Field

[0001] This utility model relates to the field of deacidification tower technology, specifically a deacidification tower for hazardous waste incineration. Background Technology

[0002] The incineration of hazardous waste generates large amounts of acidic gases, such as hydrogen chloride and sulfur dioxide. If these acidic gases are directly released into the atmosphere, they will cause serious harm to the environment and human health. Acid removal towers are devices used to remove acidic gases from the flue gas from hazardous waste incineration. Common types include wet acid removal towers, dry acid removal towers, and semi-dry acid removal towers.

[0003] Chinese patent CN221536204U discloses a deacidification tower for hazardous waste incineration, which solves the problem in existing technologies where the contact between flue gas and the neutralizing water sprayed out is insufficient, affecting the deacidification effect of the flue gas. The deacidification tower includes a tower body and a spray assembly. The tower body is internally divided into a neutralization tank and a spray chamber. The spray chamber is equipped with a spiral plate, and the spray heads of the spray assembly are located on the lower surface of the spiral plate.

[0004] This invention uses a spiral plate to form a spiral channel in the spray chamber, increasing the passage path of flue gas within the spray chamber. The spray head sprays neutralizing water to fully contact the flue gas. Although this solves the problem of residual acidic substances during flue gas discharge to some extent, the deacidification efficiency is low simply by discharging flue gas into neutralizing water in conjunction with spraying. Moreover, the flue gas discharged from the tower is unfiltered, and the high humidity of the flue gas can carry away some acidic substances, reducing the overall deacidification effect. Therefore, a deacidification tower for hazardous waste incineration is proposed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a deacidification tower for hazardous waste incineration, which has the advantages of good deacidification effect and easy maintenance. It solves the problems of low deacidification efficiency and high exhaust humidity with residues in the deacidification process of hazardous waste incineration deacidification towers.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a deacidification tower for hazardous waste incineration, comprising a base and a deacidification tank fixed on the top of the base, wherein an air inlet assembly for deacidification is provided on the outside of the deacidification tank, and an exhaust assembly for filtering waste gas is provided inside the deacidification tank.

[0007] The air intake assembly includes an annular air intake pipe fixed to the bottom of the deacidification tank. Several air guide pipes are evenly fixed to the top of the annular air intake pipe. A sealing cylinder is rotatably connected to the outside of the air guide pipe. An annular fixing pipe is fixed to the top of the air guide pipe. Several air supply pipes communicating with the inside of the annular fixing pipe are fixed to the inside of the deacidification tank. An air outlet is fixed to the bottom end of the air supply pipe.

[0008] The exhaust assembly includes an isolation base plate fixed to the inner side wall of the deacidification tank, an isolation top plate above the isolation base plate, a tank cover plate threadedly fixed to the top of the deacidification tank, and an exhaust pipe fixed to the top of the tank cover plate.

[0009] The inner side of the annular air intake pipe is fixedly connected to a cross-shaped air intake pipe, and the bottom of the air intake pipe is fixed with a connecting valve for air intake. The two ends of the air guide pipe are respectively fixedly installed to the annular air intake pipe and the annular fixed pipe by threads.

[0010] The air guide tube and the sealing cylinder have openings on their surfaces for use. The inner walls of the air guide tube at both ends of the opening are fixed with filling plates. The surface of the filling plates has several air holes, and filter cotton with deacidifying agent is filled between the two filling plates.

[0011] The gas supply pipe has a Z-shaped structure and penetrates the side wall of the deacidification tank to the bottom of the inner cavity of the deacidification tank. A threaded opening is provided at the bottom end of the gas supply pipe, and one end of the gas outlet is inserted into the threaded opening and fixedly installed with the gas supply pipe by the thread.

[0012] The deacidification tank is filled with neutralizing liquid and has a liquid outlet valve fixed on its back. The liquid level of the neutralizing liquid is greater than the height of the gas outlet cylinder. The annular surface of the gas outlet cylinder has several annularly distributed air holes.

[0013] The bottom of the isolation base plate is fixed with several evenly distributed atomizing spray heads. Both the isolation base plate and the isolation top plate have several air vents on their surfaces, and the air vents are staggered. The top of the isolation base plate is filled with filter cotton containing alkaline particles.

[0014] The bottom of the isolation top plate is fixed with several support rods that abut against the isolation base plate, and the inner wall of the deacidification tank above the isolation top plate is fixed with several ring-shaped pH monitoring sensors.

[0015] The top of the bucket lid has an outlet, and the air outlet pipe has an I-shaped structure and extends vertically through the outlet to the bottom of the bucket lid. The bottom of the air outlet pipe, located below the bucket lid, has several air inlets.

[0016] The vent pipe is located at the bottom above the barrel cover and has several vent holes, and the inside of the vent pipe is filled with desiccant.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0018] 1. This deacidification tower for hazardous waste incineration uses filter cotton containing deacidifying agent placed in the gas duct to initially adsorb the flue gas flowing through it. The flue gas is then dispersed through pores on the surface of the outlet cylinder into the neutralization liquid inside the deacidification tank. After being treated by the neutralization liquid, the flue gas rises to below the isolation bottom plate. After secondary treatment by the atomizing spray head, the flue gas enters above the isolation bottom plate, is adsorbed by the filter cotton containing alkaline particles, and is then discharged to above the isolation top plate. After being dried through the outlet pipe, it is smoothly discharged, improving the deacidification efficiency and avoiding residue.

[0019] 2. This deacidification tower for hazardous waste incineration has openings on the surface of the gas guide pipe and the sealing cylinder, which facilitates the placement and replacement of filter cotton containing deacidifying agent inside the gas guide pipe. Rotating the sealing cylinder causes the openings between the gas guide pipe and the sealing cylinder to be misaligned, so that the sealing cylinder seals the openings of the gas guide pipe, forming a sealed pipe structure. This allows the flue gas in the annular inlet pipe to be smoothly introduced into the interior of the annular fixed pipe and then into the deacidification tank for treatment. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present utility model;

[0021] Figure 2 This is a perspective view of the air intake assembly of this utility model;

[0022] Figure 3 This is a cross-sectional view of the present invention.

[0023] In the diagram: 1. Base; 2. Deacidification tank; 3. Air inlet assembly; 31. Annular air inlet pipe; 32. Air guide pipe; 33. Sealing cylinder; 34. Annular fixed pipe; 35. Gas delivery pipe; 36. Air outlet pipe; 37. Filling plate; 4. Exhaust assembly; 41. Isolation bottom plate; 42. Isolation top plate; 43. Tank lid; 44. Air outlet pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 In this embodiment, a deacidification tower for hazardous waste incineration includes a base 1 and a deacidification tank 2 fixed on the top of the base 1. An air inlet assembly 3 for deacidification is provided on the outside of the deacidification tank 2, and an exhaust assembly 4 for filtering exhaust gas is provided inside the deacidification tank 2.

[0026] Please see Figure 2In this embodiment, the air intake assembly 3 includes an annular air intake pipe 31 fixed to the bottom of the deacidification tank 2. Several air guide pipes 32 are uniformly fixed to the top of the annular air intake pipe 31. A sealing cylinder 33 is rotatably connected to the outside of the air guide pipe 32. An annular fixing pipe 34 is fixed to the top of the air guide pipe 32. Several air supply pipes 35 that communicate with the inside of the deacidification tank 2 are fixed to the inside of the annular fixing pipe 34. An air outlet cylinder 36 is fixed to the bottom end of the air supply pipe 35.

[0027] In this embodiment, a cross-shaped air intake pipe is fixedly connected to the inner side of the annular air intake pipe 31, and a connecting valve for air intake is fixed at the bottom of the air intake pipe. The two ends of the air guide pipe 32 are respectively fixedly installed to the annular air intake pipe 31 and the annular fixed pipe 34 by threads.

[0028] In this embodiment, the surfaces of the air guide tube 32 and the sealing cylinder 33 are provided with openings for cooperation. The inner walls of the air guide tube 32 at both the upper and lower ends of the opening are fixed with filling plates 37. The surface of the filling plates 37 is provided with several air holes, and the space between the two filling plates 37 is filled with filter cotton containing deacidifying agent.

[0029] Two filling plates 37 are used to hold filter cotton containing deacidifying agent. When the two openings overlap, the filter cotton can be placed and replaced. When the two openings are staggered, the air guide tube 32 and the sealing cylinder 33 form a complete air passage.

[0030] It should be noted that the inner wall of the sealing cylinder 33 is provided with a rubber gasket to seal the opening of the gas guide tube 32, so as to prevent the gas from escaping during the flow process.

[0031] In this embodiment, the gas supply pipe 35 has a Z-shaped structure and penetrates through the side wall of the deacidification tank 2 to the bottom of the inner cavity of the deacidification tank 2. The bottom end of the gas supply pipe 35 is provided with a threaded opening, and one end of the gas outlet cylinder 36 is inserted into the threaded opening and fixedly installed with the gas supply pipe 35 by the thread.

[0032] In this embodiment, the deacidification tank 2 is filled with neutralizing liquid and has a liquid outlet valve fixed on its back. The liquid level of the neutralizing liquid is greater than the height of the air outlet cylinder 36. The annular surface of the air outlet cylinder 36 is provided with a number of annularly distributed air holes.

[0033] It should be noted that the position of the liquid outlet valve is greater than the height of the gas outlet cylinder 36, so that the neutralizing liquid can completely submerge the gas outlet cylinder 36, while preventing the neutralizing liquid from being too much inside the deacidification tank 2. At the same time, a pH detection sensor is fixed at the bottom of the gas outlet cylinder 36 to monitor the current pH value of the neutralizing liquid in real time. The vent of the gas outlet cylinder 36 can only allow one-way gas flow.

[0034] Please see Figure 3In this embodiment, the exhaust assembly 4 includes an isolation bottom plate 41 fixed to the inner side wall of the deacidification tank 2, an isolation top plate 42 above the isolation bottom plate 41, a tank cover plate 43 threadedly fixed to the top of the deacidification tank 2, and an exhaust pipe 44 fixed to the top of the tank cover plate 43.

[0035] In this embodiment, a number of evenly distributed atomizing spray heads are fixed at the bottom of the isolation base plate 41. A number of vent holes are opened on the surface of both the isolation base plate 41 and the isolation top plate 42, and the vent holes are staggered. A filter cotton containing alkaline particles is placed on the top of the isolation base plate 41. A number of support rods that abut against the isolation base plate 41 are fixed at the bottom of the isolation top plate 42. A number of ring-shaped pH monitoring sensors are fixed on the inner wall of the deacidification tank 2 above the isolation top plate 42.

[0036] The isolation base plate 41 and the isolation top plate 42 are separated by a support rod, which facilitates the replacement and replenishment of the filter cotton for alkaline particles in the later stage. The pH value monitoring sensor monitors the pH value of the current gas.

[0037] It should be noted that when using the atomizing spray head, it needs to be connected to an external neutralizing liquid supply pipe. The pressurized neutralizing liquid is sent into the atomizing spray head and discharged through the atomizing spray head, so that the flue gas that has been absorbed and treated by the neutralizing liquid is sprayed and neutralized a second time.

[0038] In this embodiment, the top of the barrel lid 43 is provided with an outlet, the air outlet pipe 44 is an I-shaped structure and vertically passes through the outlet to the bottom of the barrel lid 43, the bottom of the air outlet pipe 44 located below the barrel lid 43 is provided with several air inlets, the bottom of the air outlet pipe 44 located above the barrel lid 43 is provided with several air outlets, and the interior of the air outlet pipe 44 is filled with desiccant.

[0039] By placing a desiccant inside the exhaust pipe 44, the exhaust gas is dried, preventing the exhaust gas from having high humidity and carrying neutralizing liquid and acidic substances.

[0040] All electrical components mentioned in this article are electrically connected to the controller and power supply. The control method of this utility model is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0041] The working principle of the above embodiments is as follows:

[0042] By connecting the valve at the bottom of the annular inlet pipe 31 to the flue gas pipe, the flue gas enters the interior of the guide pipe 32 through the annular inlet pipe 31. Filter cotton containing deacidifying agent is filled between the two filling plates 37. When the sealing cylinder 33 is rotated so that the openings of the guide pipe 32 and the sealing cylinder 33 overlap, the filter cotton can be placed and replaced. When the two openings are staggered, the guide pipe 32 and the sealing cylinder 33 form a complete ventilation pipe. After preliminary treatment by the filter cotton containing deacidifying agent, the flue gas enters the interior of the annular fixed pipe 34. The flue gas is then introduced into the deacidification tank 2 through the gas delivery pipe 35 and discharged into the deacidification tank 2 through the vent holes on the surface of the outlet pipe 36. In the neutralization liquid, the acidic substances inside the flue gas are treated by the neutralization liquid and discharged from the top of the neutralization liquid. After the flue gas rises, the neutralization liquid continuously sprayed from the atomizing spray head comes into full contact with the flue gas again. The flue gas passes through the vent holes of the isolation bottom plate 41 to the top of the isolation bottom plate 41. The flue gas with high humidity is adsorbed by the filter cotton containing alkaline particles and reaches the top of the isolation top plate 42 through the vent holes of the isolation top plate 42. The flue gas enters the exhaust pipe 44 and is dried by the desiccant inside the exhaust pipe 44 before being discharged smoothly, thus achieving deacidification treatment. This solves the problems of low deacidification efficiency and high exhaust humidity with residue in the deacidification tower process for hazardous waste incineration.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A deacidification tower for hazardous waste incineration, comprising a base (1) and a deacidification tank (2) fixed to the top of the base (1), characterized in that: The deacidification tank (2) is provided with an air inlet assembly (3) for deacidification on the outside and an exhaust assembly (4) for filtering exhaust gas inside the deacidification tank (2). The air intake assembly (3) includes an annular air intake pipe (31) fixed at the bottom of the deacidification tank (2). Several air guide pipes (32) are uniformly fixed at the top of the annular air intake pipe (31). A sealing cylinder (33) is rotatably connected to the outside of the air guide pipe (32). An annular fixing pipe (34) is fixed at the top of the air guide pipe (32). Several air supply pipes (35) communicating with the inside of the annular fixing pipe (34) are fixed on the inside of the annular fixing pipe (34). An air outlet cylinder (36) is fixed at the bottom end of the air supply pipe (35). The exhaust assembly (4) includes an isolation bottom plate (41) fixed to the inner side wall of the deacidification tank (2), an isolation top plate (42) is provided above the isolation bottom plate (41), a tank cover plate (43) is threadedly fixed to the top of the deacidification tank (2), and an exhaust pipe (44) is fixed to the top of the tank cover plate (43).

2. The deacidification tower for hazardous waste incineration according to claim 1, characterized in that: The inner side of the annular air intake pipe (31) is fixedly connected to an air intake pipe with a cross-shaped structure. The bottom of the air intake pipe is fixed with a connecting valve for air intake. The two ends of the air guide pipe (32) are respectively fixedly installed to the annular air intake pipe (31) and the annular fixed pipe (34) by threads.

3. The deacidification tower for hazardous waste incineration according to claim 1, characterized in that: The surfaces of the air guide tube (32) and the sealing cylinder (33) are provided with openings for cooperation. The inner walls of the air guide tube (32) at both ends of the opening are fixed with filling plates (37). The surface of the filling plates is provided with several air holes, and the space between the two filling plates (37) is filled with filter cotton containing deacidifying agent.

4. The deacidification tower for hazardous waste incineration according to claim 1, characterized in that: The gas supply pipe (35) has a Z-shaped structure and passes through the side wall of the deacidification tank (2) to the bottom of the inner cavity of the deacidification tank (2). The bottom end of the gas supply pipe (35) is provided with a threaded opening. One end of the gas outlet cylinder (36) is inserted into the threaded opening and is fixedly installed with the gas supply pipe (35) by the thread.

5. The deacidification tower for hazardous waste incineration according to claim 1, characterized in that: The deacidification tank (2) is filled with neutralizing liquid and has a liquid outlet valve fixed on its back. The liquid level of the neutralizing liquid is greater than the height of the air outlet cylinder (36). The annular surface of the air outlet cylinder (36) is provided with a number of annularly distributed air holes.

6. The deacidification tower for hazardous waste incineration according to claim 1, characterized in that: The bottom of the isolation base plate (41) is fixed with several evenly distributed atomizing spray heads. The surfaces of the isolation base plate (41) and the isolation top plate (42) are provided with several air vents, and the air vents are staggered. The top of the isolation base plate (41) is placed with filter cotton containing alkaline particles.

7. The deacidification tower for hazardous waste incineration according to claim 1, characterized in that: The bottom of the isolation top plate (42) is fixed with several support rods that abut against the isolation bottom plate (41), and the inner wall of the deacidification tank (2) above the isolation top plate (42) is fixed with several ring-shaped pH monitoring sensors.

8. The deacidification tower for hazardous waste incineration according to claim 1, characterized in that: The top of the barrel lid (43) is provided with an outlet, and the air outlet pipe (44) is an I-shaped structure that vertically passes through the outlet to the bottom of the barrel lid (43). The bottom of the air outlet pipe (44) located below the barrel lid (43) is provided with several air inlets.

9. A deacidification tower for hazardous waste incineration according to claim 1, characterized in that: The vent pipe (44) is located at the bottom above the barrel cover (43) and has several vent holes, and the interior of the vent pipe (44) is filled with desiccant.

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