Kiln waste gas filtering device

Abstract

The utility model relates to the technical field of kiln equipment, and discloses a kiln waste gas filtering device which comprises a reaction box, a gas inlet pipe is arranged at one end of the reaction box, a gas outlet pipe is arranged at the other end of the reaction box, a spraying assembly and a circulating spraying assembly are arranged at the top of the reaction box, and a backflow pipe is arranged at the bottom of one side of the reaction box. One end of the return pipe is communicated into the reaction box, the other end of the return pipe is connected with a filter box, the reaction box comprises a box shell, a filter plate is mounted in the middle of the box shell and divides the inner space of the box shell into a left spraying chamber and a right spraying chamber, and box bottoms are mounted at the bottoms of the left spraying chamber and the right spraying chamber. According to the kiln waste gas filtering device, the structure of the left and right spraying chambers is arranged, and a filter screen partition plate is arranged between the left and right spraying chambers to force waste gas to horizontally penetrate through multiple layers of spraying areas, so that the actual retention time of airflow in the spraying chambers is prolonged, and the waste gas fully reacts with a washing solution; by constructing the structure of a cross-chamber circulating system, the left side spraying waste liquid is filtered and then reused.

Description

Technical Field

[0001] This utility model relates to the field of kiln equipment technology, and in particular to a kiln exhaust gas filtration device. Background Technology

[0002] Kiln exhaust gas refers to the waste gas emitted from industrial kilns (such as ceramic kilns, cement kilns, iron and steel smelting kilns, glass kilns, etc.) during the production process, resulting from fuel combustion, high-temperature decomposition of materials, or chemical reactions. Direct emission of this gas can lead to environmental pollution and ecological damage.

[0003] Prior art application number 202121262861.9 discloses a kiln exhaust gas filtration device, which consists of an upper box and a lower box connected together by threads. A spray pipe is fixedly connected to the inner surface of the upper end of the upper box, and a water pump is installed outside the upper box. Several spray heads are installed on the spray pipe, and a filter screen is fitted onto the inner surface of the lower box. The spray head sprays cleaning liquid to filter the kiln exhaust gas. After the cleaning liquid is used, it is filtered through the filter screen and enters the bottom of the lower box. Then, the cleaning liquid at the bottom of the lower box is pumped back into the spray pipe for repeated use, thereby improving the utilization rate of the cleaning liquid.

[0004] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: during the process of spraying and washing exhaust gas with washing solution, due to the existence of dead corners in the spraying of washing solution and insufficient contact time between exhaust gas and washing solution, the exhaust gas does not react fully with the washing solution, thereby affecting the purification effect of exhaust gas. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantages of dead corners in the spraying of washing solution and insufficient contact time between waste gas and washing solution, resulting in insufficient purification of waste gas. To this end, we propose a kiln waste gas filtration device.

[0006] To achieve the above objectives, this application adopts the following technical solution: a kiln exhaust gas filtration device, comprising: a reaction chamber, an inlet pipe at one end of the reaction chamber, an outlet pipe at the other end of the reaction chamber, a spray assembly and a circulating spray assembly at the top of the reaction chamber, the spray assembly being near the inlet pipe and the circulating spray assembly being near the outlet pipe, a return pipe being provided at the bottom of one side of the reaction chamber, one end of the return pipe leading into the interior of the reaction chamber and the other end of the return pipe being connected to a filter box, the reaction chamber comprising a shell, a filter plate installed in the middle of the shell, the filter plate dividing the interior space of the shell into a left spray chamber and a right spray chamber, the left spray chamber being near the inlet pipe and the right spray chamber being near the outlet pipe, and a bottom plate being installed at the bottom of both the left and right spray chambers.

[0007] Preferably, the bottom of the tank is a sloping surface that is higher around the edges and lower in the middle, and a drain outlet is provided in the low-lying part of the bottom of both the left and right spray chambers.

[0008] Preferably, the bottom of the return pipe is higher than the highest point of the bottom of the box.

[0009] Preferably, the spray assembly includes an inlet pipe, a guide pipe connected to the bottom of the inlet pipe, the inlet pipe and the guide pipe connected in the middle, a spray pipe connected to both ends of the guide pipe, a plurality of nozzles installed on the spray pipe, and the spray pipes installed on both sides of the top of the left spray chamber.

[0010] Preferably, the circulating spray assembly includes a water pump, one end of which is connected to the top of the filter box, and the other end of which is connected to a guide pipe II. The water pump is connected to the middle of the guide pipe I, and both ends of the guide pipe II are connected to spray pipe II. Multiple nozzles II are installed on the spray pipe II, and the spray pipe II is installed on both sides of the top of the right spray chamber.

[0011] Preferably, the first and second nozzles are tilted downwards at a 45-degree angle.

[0012] Preferably, the orifice diameter of the first nozzle is larger than that of the second nozzle.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] In this invention, a structure with left and right spray chambers is provided. A filter screen partition is set in the middle of the left and right spray chambers to force the exhaust gas to pass horizontally through the multi-layer spray area, thereby extending the actual residence time of the airflow in the spray chamber and allowing the exhaust gas to fully react with the washing solution.

[0015] In this invention, by constructing a cross-chamber circulation system, the waste liquid from the left-side spraying is filtered and reused, thus solving the problem of waste caused by insufficient use of the washing solution in a single application. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 2 ;

[0019] Figure 3 A three-dimensional structural diagram of the spray assembly of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal planar structure of the reaction chamber of this utility model.

[0021] Legend: 1. Reaction chamber; 11. Chamber shell; 12. Left spray chamber; 13. Right spray chamber; 14. Bottom of the chamber; 15. Drain outlet; 2. Air inlet pipe; 3. Air outlet pipe; 4. Spray assembly; 41. Liquid inlet pipe; 42. Guide pipe one; 43. Spray pipe one; 44. Nozzle one; 5. Return pipe; 6. Filter box; 7. Circulating spray assembly; 71. Water pump; 72. Guide pipe two; 73. Spray pipe two; 74. Nozzle two; 8. Filter plate. Detailed Implementation

[0022] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0023] Reference Figures 1-2 As shown, this utility model provides a technical solution: a kiln exhaust gas filtration device, comprising: a reaction chamber 1, an inlet pipe 2 disposed at the lower end of one end of the reaction chamber 1, an outlet pipe 3 disposed at the upper end of the other end of the reaction chamber 1, a spray assembly 4 and a circulating spray assembly 7 disposed at the top of the reaction chamber 1, the spray assembly 4 being close to the end of the inlet pipe 2, the circulating spray assembly 7 being close to the end of the outlet pipe 3, a return pipe 5 disposed at the bottom of one side of the reaction chamber 1, one end of the return pipe 5 entering the interior of the reaction chamber 1, and the other end of the return pipe 5 being connected to a filter box 6 via a pipe.

[0024] Reference Figures 3-4 As shown in this embodiment: the reaction chamber 1 includes a shell 11, and a filter plate 8 is fixedly installed in the middle of the shell 11. The filter plate 8 divides the internal space of the shell 11 into a left spray chamber 12 and a right spray chamber 13. The left spray chamber 12 is near the end of the air inlet pipe 2, and the right spray chamber 13 is near the end of the air outlet pipe 3. The spray assembly 4 is installed at the top of the left spray chamber 12, and the circulating spray assembly 7 is installed at the top of the right spray chamber 13. The bottom of the left spray chamber 12 and the right spray chamber 13 are both installed with a bottom 14 by welding. The bottom 14 of the left spray chamber 12 and the right spray chamber 13 are both sloping surfaces that are high around the edges and low in the middle. The bottom of the bottom 14 of the left spray chamber 12 and the right spray chamber 13 are both provided with a drain port 15 in the low-lying part in the middle to discharge the precipitate after the waste gas reacts with the washing solution. The return pipe 5 is installed at the upper end of the bottom 14, and the bottom of the return pipe 5 is slightly higher than the highest point of the bottom 14.

[0025] Reference Figures 3-4As shown in this embodiment: the spray assembly 4 includes an inlet pipe 41, the bottom of the inlet pipe 41 is connected to a guide pipe 42, the inlet pipe 41 and the guide pipe 42 are connected by welding in the middle, both ends of the guide pipe 42 are connected to spray pipes 43, and multiple nozzles 44 are installed on the spray pipes 43 by screws. The spray pipes 43 are installed on both sides of the top of the left spray chamber 12 and are set at a downward 45-degree angle.

[0026] Reference Figures 3-4 As shown in this embodiment: the circulating spray assembly 7 includes a water pump 71. One end of the water pump 71 is connected to the top of the filter box 6 through a pipe, and the other end of the water pump 71 is connected to a guide pipe 42 through a pipe. The water pump 71 is connected to the middle of the guide pipe 42. Both ends of the guide pipe 72 are connected to spray pipes 73. Multiple nozzles 74 are installed on the spray pipes 73 by screws. The spray pipes 73 are installed on both sides of the top of the right spray chamber 13, tilted downward at a 45-degree angle. The orifice diameter of the nozzle 44 is larger than that of the nozzle 74. The nozzles 44 generate larger droplets that react with the exhaust gas first, reducing the load of subsequent fine treatment. The nozzles 74 use small-diameter nozzles to form a fine mist spray, which reacts with small molecule pollutants in the exhaust gas to form a coarse-fine graded reaction gradient, improving the cleaning effect.

[0027] Working principle: During use, the exhaust gas generated by the kiln is introduced into the left spray chamber 12 through the air inlet pipe 2. The washing solution is introduced through the liquid inlet pipe 41 and sprayed out through the nozzle 44. Due to the larger aperture of the nozzle 44, large particulate pollutants in the exhaust gas are captured first. After the exhaust gas reacts with the washing solution, the solution falls into the bottom 14 of the tank. After 5 minutes of sedimentation in the bottom 14, the impurities settle down. The exhaust gas, after being washed, enters the right spray chamber 13 through the filter plate 8. At this time, the water pump 71 is turned on so that the solution in the bottom 14 of the tank flows into the return pipe 5. After being filtered through the filter box 6, it is sprayed out through the nozzle 74. The smaller aperture of the nozzle 74 reacts again with the exhaust gas entering the right spray chamber 13. The washed wastewater falls into the bottom 14 of the tank and is finally discharged through the drain port 15. The gas after the second washing is finally discharged through the exhaust pipe 3.

[0028] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A kiln exhaust gas filtration device, characterized in that, The reaction chamber includes an air inlet pipe at one end and an air outlet pipe at the other end. A spray assembly and a circulating spray assembly are located on the top of the reaction chamber. A return pipe is located at the bottom of one side of the reaction chamber, with one end leading into the interior of the reaction chamber and the other end connected to a filter box. The reaction chamber includes a shell, with a filter plate installed in the middle of the shell. The filter plate divides the interior space of the shell into a left spray chamber and a right spray chamber. The left spray chamber is located near the air inlet pipe, and the right spray chamber is located near the air outlet pipe. The spray assembly is installed at the top of the left spray chamber, and the circulating spray assembly is installed at the top of the right spray chamber. A bottom panel is installed at the bottom of both the left and right spray chambers.

2. The kiln exhaust gas filtration device according to claim 1, characterized in that: The bottom of the tank is a sloping surface that is higher around the edges and lower in the middle. Drainage outlets are provided in the low-lying areas in the middle of the bottom of both the left and right spray chambers.

3. The kiln exhaust gas filtration device according to claim 1, characterized in that: The bottom of the return pipe is higher than the highest point of the bottom of the box.

4. The kiln exhaust gas filtration device according to claim 1, characterized in that: The spray assembly includes an inlet pipe, a guide pipe connected to the bottom of the inlet pipe, the inlet pipe and the guide pipe connected in the middle, and spray pipes connected to both ends of the guide pipe. Multiple nozzles are installed on the spray pipes, which are installed on both sides of the top of the left spray chamber.

5. The kiln exhaust gas filtration device according to claim 4, characterized in that: The circulating spray assembly includes a water pump, one end of which is connected to the top of the filter box, and the other end of which is connected to a guide pipe. The water pump is connected to the middle of the guide pipe, and both ends of the guide pipe are connected to spray pipes. Multiple nozzles are installed on the spray pipes. The spray pipes are installed on both sides of the top of the right spray chamber.

6. The kiln exhaust gas filtration device according to claim 5, characterized in that: The first and second nozzles are set at a downward 45-degree angle.

7. The kiln exhaust gas filtration device according to claim 5, characterized in that: The orifice diameter of nozzle one is larger than that of nozzle two.

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