A tail gas spray absorption tower based on tower internal filtration

Abstract

The utility model belongs to tail gas treatment technical field especially relates to a tail gas spray absorption tower based on filtering in tower, including tower body, being equipped with spray chamber, filter chamber located below it and the first baffle between both, the first baffle realizes dry and wet separation and is provided with the communication port only for tail gas circulation, and the filter chamber is equipped with the separation mechanism of the solid particle preliminary separation in tail gas, and the filter mechanism of the tail gas secondary filtration after preliminary separation is installed at the communication port, and the spray chamber is equipped with the spray mechanism, the absorption tower is integrated filtering structure and dry and wet separation design through the tower, can guarantee waste residue low moisture content to reduce the processing cost, can avoid the additional increase equipment land occupation and pipeline connection point, reduces the security risk and environmental pollution, simultaneously, the two -stage processing mode of separation mechanism and filter mechanism can alleviate the filter mechanism pressure, prolongs its maintenance cycle and life.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust gas treatment technology, and in particular relates to an exhaust gas spray absorption tower based on in-tower filtration. Background Technology

[0002] In industry, environmental protection and related fields, exhaust gas is usually generated during production, operation and reaction processes. This exhaust gas needs to be treated before being discharged. On the one hand, it can avoid pollution to the environment, and on the other hand, it can recycle some of the materials carried in the exhaust gas.

[0003] Traditional exhaust gas treatment typically employs spraying, but since exhaust gases often carry solid particles or dust, while spraying can intercept these solid particles, it easily generates a large amount of waste residue with high water content. Compared to drying the waste residue, its treatment cost is usually higher. In order to ensure the waste residue is dry, it is usually necessary to filter the exhaust gas before it enters the absorption tower for spraying absorption. This not only increases the equipment's footprint but also increases the number of pipe connection points between equipment. These connection points are prone to exhaust gas leaks, which can easily lead to safety hazards or environmental pollution. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a tail gas spray absorption tower based on in-tower filtration, which achieves the effect of using in-tower filtration and obtaining dry waste residue.

[0005] In view of this, the present invention provides a tail gas spray absorption tower based on in-tower filtration, comprising: The tower body has a spray chamber inside and a filter chamber located below the spray chamber; The first partition is installed between the spray chamber and the filter chamber, and is used to isolate the spray chamber and the filter chamber to achieve dry and wet separation, and has a connecting port for exhaust gas circulation only. The separation mechanism is installed inside the filter chamber and is used to perform preliminary separation of solid particles carried in the exhaust gas. The filtration mechanism is installed at the connection port of the first partition and is used to perform secondary filtration on the exhaust gas after it has been processed by the separation mechanism, and to introduce the filtered exhaust gas into the spray chamber through the connection port. The spraying mechanism is installed inside the spraying chamber and is used for spraying and absorbing the filtered exhaust gas.

[0006] In the above technical solution, the separation mechanism further includes: The second partition is installed inside the filter chamber and is used to divide the filter chamber into an air inlet chamber and an ash collection chamber. A first air inlet is provided on the side of the tower body located in the air inlet chamber and a discharge outlet is provided on the bottom surface of the ash collection chamber. The guide cylinder is vertically installed on the lower end face of the second partition, and the second partition has a second air inlet that communicates with the inside of the guide cylinder. An air guide cylinder is coaxially arranged with a material guide cylinder, with its bottom end extending into the material guide cylinder and its top end extending to the inner wall of the first partition and the connecting port, and a protrusion protruding from the second partition is formed at the top end. The guide vanes are installed on the upper end face of the second baffle and are used to guide the exhaust gas into the guide cylinder in a spiral manner from the second air inlet. The guide vanes are arranged in multiple circumferences, and the end of the material guide cylinder away from the air guide cylinder forms a constriction.

[0007] In the above technical solution, further: Multiple feed tubes and air tubes are evenly spaced along the radial surface of the tower body on the second partition plate.

[0008] In the above technical solution, further: The surface of the air guide tube is fitted with a cover plate, which is used to restrict the exhaust gas from entering the guide vanes axially.

[0009] In the above technical solution, further: The filtration mechanism includes a filter screen located at the end of the air guide cylinder away from the material guide cylinder; The filter screen is equipped with a dust removal mechanism to clean the solid particles deposited on it. A guide hood is installed on the dust removal mechanism to prevent the falling spray water from entering the air guide tube through the filter screen.

[0010] In the above technical solution, the dust removal mechanism further includes: The air duct is installed inside the spray chamber and located on the filter screen; Air nozzles are connected to the lower end face of the air guide tube, and multiple nozzles are provided, each corresponding to a filter screen on a multiple air guide tube. Connecting tube, used for connecting the air guide tube to the air nozzle and for internal communication; The gas duct extends outside the tower body and is connected to a gas supply source.

[0011] In the above technical solution, further: The first partition includes an inclined first plate and a vertically arranged second plate; The connecting port is located on the first plate, which is used to guide the spray water to the second plate, and a drain pipe connected to the spray chamber is provided on the side of the tower body.

[0012] In the above technical solution, further: The spraying mechanism includes multiple spray pipes and multiple packing layers arranged alternately from top to bottom.

[0013] The beneficial effects of this utility model are as follows: 1. By setting a first baffle in the tower body, the dry and wet separation between the spray chamber and the filter chamber is achieved, and the two chambers are connected by a connecting port for the flow of exhaust gas only. This effectively ensures that the generated waste residue has a low water content, effectively reducing the cost of subsequent waste residue treatment. In addition, the filtration inside the tower avoids increasing the footprint of the exhaust gas treatment equipment and the number of pipeline connection points, thereby avoiding safety hazards or environmental pollution.

[0014] 2. The exhaust gas is first initially separated by the separation mechanism, and then filtered by the filtration mechanism. This can effectively reduce the filtration pressure on the filtration mechanism, extend the cleaning and maintenance cycle and service life of the filtration mechanism, and the dust removal mechanism can improve the convenience of cleaning the filter screen.

[0015] 3. By setting up the feed tube and air tube, and by using guide vanes to spirally guide the exhaust gas, the separation of solid particles in the exhaust gas is promoted, reducing the subsequent filtration pressure.

[0016] 4. By setting the first baffle as an inclined plate, when some fine solid particles that pass through the filter screen are intercepted by the sprayed water and deposited on the first baffle, the sprayed water can flow on the first baffle, thereby driving the solid particles out, reducing the subsequent cleaning pressure on the first baffle and improving convenience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention. Figure 3 This is a utility model Figure 2 Sectional view at point AA; Figure 4 This is a schematic diagram of the internal structure of this utility model; Figure 5 This is a utility model Figure 4 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the separation mechanism and filtration mechanism of this utility model; The markings in the diagram represent: 1. Tower body; 2. Spray chamber; 3. Filter chamber; 30. Air inlet chamber; 31. Ash collection chamber; 4. First partition plate; 40. First plate; 41. Second plate; 5. Connecting port; 6. Separation mechanism; 60. Second partition plate; 61. Feed guide cylinder; 610. Neck; 62. Second air inlet; 63. Air guide cylinder; 630. Protrusion; 64. Guide vane; 65. Cover plate; 7. Filtering mechanism; 70. Filter screen; 71. Ash removal mechanism; 710. Air guide pipe; 711. Air nozzle; 712. Connecting pipe; 72. Flow guide hood; 8. Spraying mechanism; 80. Spray pipe; 81. Packing layer; 9. First air inlet; 10. Discharge port; 11. Drain pipe. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0019] Example 1: This embodiment provides a tail gas spray absorption tower based on in-tower filtration, comprising: The tower body 1 has a spray chamber 2 and a filter chamber 3 located below the spray chamber 2 inside; The first partition 4 is installed between the spray chamber 2 and the filter chamber 3, and is used to isolate the spray chamber 2 and the filter chamber 3 to achieve dry and wet separation, and has a connecting port 5 for exhaust gas circulation only. Separation mechanism 6 is installed inside filter chamber 3 and is used for preliminary separation of solid particles carried in exhaust gas; The filter mechanism 7 is installed at the communication port 5 of the first partition plate 4 and is used to perform secondary filtration on the exhaust gas after it has been processed by the separation mechanism 6, and to introduce the filtered exhaust gas into the spray chamber 2 through the communication port 5. The spraying mechanism 8 is installed inside the spraying chamber 2 and is used for spraying and absorbing the filtered exhaust gas. An air outlet is provided at the top of the tower body 1 above the spray chamber 2.

[0020] As can be seen from this embodiment, by setting the first partition 4 inside the tower body 1, the dry and wet separation between the spray chamber 2 and the filter chamber 3 is achieved, and only the exhaust gas is allowed to circulate between the two chambers through the connecting port 5, which effectively ensures that the generated waste residue has a low water content, effectively reduces the subsequent waste residue treatment cost, and the in-tower filtration avoids increasing the footprint of the exhaust gas treatment equipment and the number of pipe connection points, thereby avoiding safety hazards or environmental pollution. The exhaust gas is first initially separated by the separation mechanism 6, and then filtered by the filtration mechanism 7. This can effectively reduce the filtration pressure of the filtration mechanism 7 and extend the cleaning and maintenance cycle and service life of the filtration mechanism 7.

[0021] Example 2: This embodiment provides a tail gas spray absorption tower based on in-tower filtration. In addition to the technical solutions of the above embodiments, it also has the following technical features: the separation mechanism 6 includes: The second partition 60 is installed in the filter chamber 3 and is used to divide the filter chamber 3 into an air inlet chamber 30 and an ash collection chamber 31. A first air inlet 9 is provided on the side of the tower body 1 located in the air inlet chamber 30 and a discharge outlet 10 is provided on the bottom surface of the ash collection chamber 31. The guide cylinder 61 is vertically installed on the lower end face of the second partition 60, and the second partition 60 has a second air inlet 62 that communicates with the inside of the guide cylinder 61. The air guide cylinder 63 is coaxially arranged with the material guide cylinder 61, and its bottom end extends into the material guide cylinder 61, and its top end extends into the inner wall of the first partition 4 and the connecting port 5 and is fixedly connected, and a protrusion 630 protruding from the second partition 60 is formed at the top end. The guide vane 64 is installed on the upper end face of the second baffle 60 and is used to guide the exhaust gas into the guide cylinder 61 from the second air inlet 62 in a spiral manner. Among them, multiple guide vanes 64 are arranged around the circumference, and the end of the material guide cylinder 61 away from the air guide cylinder 63 forms a neck 610; Meanwhile, the separation mechanism 6 causes solid particles to fall from the bottom of the feed cylinder 61 and exhaust gas to be discharged from the top of the air guide cylinder 63. This is the basic structure of a traditional cyclone separator, which is known to those skilled in the art. Therefore, the principle of solid particles falling from the bottom of the feed cylinder 61 and exhaust gas being discharged from the top of the air guide cylinder 63 will not be described in detail in this application.

[0022] As can be seen from this embodiment, by setting up the feed cylinder 61 and the air guide cylinder 63, and by using the guide vane 64 to spirally guide the exhaust gas, the separation of solid particles in the exhaust gas is promoted, and the subsequent filtration pressure is reduced. The second baffle 60 facilitates the installation of the feed cylinder 61 and the air cylinder 63, as well as the stability of the structure. The guide vane 64 is placed on the second baffle 60. By appropriately adjusting the length of the guide vane 64 along its arc direction, the exhaust gas can be fully guided before entering the guide cylinder, thereby increasing the swirling intensity of the exhaust gas within a certain range and thus improving the separation effect of solid particles. Furthermore, the end of the feed cylinder 61 away from the air guide cylinder 63 forms a constricted neck 610, which can further increase the probability of solid particles colliding with the inner wall of the air guide cylinder 63 when the exhaust gas swirls in the feed cylinder 61, thus enhancing the separation effect. The protrusion 630 prevents spray water from flowing into the air guide tube 63 from the surface of the first partition 4, ensuring the dry and wet separation effect between the filter chamber 3 and the spray chamber 2.

[0023] Example 3: This embodiment provides a tail gas spray absorption tower based on in-tower filtration, which, in addition to the technical solutions of the above embodiments, also has the following technical features: Multiple feed cylinders 61 and air cylinders 63 are equally spaced along the radial surface of the tower body 1 on the second partition plate 60.

[0024] As can be seen from this embodiment, by arranging multiple guide cylinders 61 and air guide cylinders 63 at equal intervals on the second partition 60, the uniformity of the distribution of exhaust gas entering the spray chamber 2 is ensured, and the contact between the exhaust gas and the spray water is guaranteed.

[0025] Example 4: This embodiment provides a tail gas spray absorption tower based on in-tower filtration, which, in addition to the technical solutions of the above embodiments, also has the following technical features: A cover plate 65 is fitted on the surface of the air guide 63, and the cover plate 65 is used to restrict the exhaust gas from entering the guide vane 64 axially. The cover plate 65 and the air guide tube 63 can be interference fit.

[0026] As can be seen from this embodiment, by setting the cover plate 65, exhaust gas is prevented from entering the guide vane 64 along the axial direction, thereby improving the effect of guiding the exhaust gas, ensuring the swirling intensity of the exhaust gas, and further improving the separation effect of solid particles.

[0027] Example 5: This embodiment provides a tail gas spray absorption tower based on in-tower filtration, which, in addition to the technical solutions of the above embodiments, also has the following technical features: The filtration mechanism 7 includes a filter screen 70 disposed at the end of the air guide cylinder 63 away from the material guide cylinder 61; The filter screen 70 is equipped with a dust removal mechanism 71, which is used to clean the solid particles deposited on the filter screen 70. A guide hood 72 is installed on the dust removal mechanism 71 to prevent the falling spray water from entering the air guide cylinder 63 through the filter screen 70.

[0028] As can be seen from this embodiment, the cleaning mechanism 71 improves the convenience of cleaning the filter screen 70, while the guide shroud 72 prevents the falling spray water from passing through the filter screen 70 and entering the air guide cylinder 63, thus ensuring the dry and wet separation effect.

[0029] Example 6: This embodiment provides a tail gas spray absorption tower based on in-tower filtration. In addition to the technical solutions of the above embodiments, it also has the following technical features: the ash removal mechanism 71 includes: The air guide pipe 710 is installed inside the spray chamber 2 and is located on the filter screen 70; Air nozzles 711 are connected to the lower end face of air duct 710, and multiple nozzles are provided, each corresponding to a filter screen 70 on a multiple air duct 63. Connecting pipe 712 is used for connection and internal communication between air guide pipe 710 and air nozzle 711; Among them, the gas pipe 710 extends to the outside of the tower body 1 and is connected to the gas supply source; Meanwhile, the specific structure of the air nozzle 711 is based on existing mature technology, that is, high-pressure air is introduced through the air guide pipe 710, and after passing through the connecting pipe 712, it is sprayed out through the air nozzle 711 to blow air backward on the filter screen 70, and the air supply source can be an air compressor to provide high-pressure air.

[0030] As can be seen from this embodiment, the arrangement of the air guide pipe 710 and the air nozzle 711 facilitates the cleaning of solid particles deposited on the filter screen 70, avoids affecting the passage of exhaust gas, and improves the convenience of cleaning the filter screen 70.

[0031] Example 7: This embodiment provides a tail gas spray absorption tower based on in-tower filtration, which, in addition to the technical solutions of the above embodiments, also has the following technical features: The first partition 4 includes an inclined first plate 40 and a vertically arranged second plate 41; The connecting port 5 is opened on the first plate 40, and the first plate 40 is used to guide the spray water to the second plate 41. A drain pipe 11 communicating with the spray chamber 2 is opened on the side of the tower body 1.

[0032] As can be seen from this embodiment, by setting the first partition 4 as an inclined plate 40, when some fine solid particles that pass through the filter screen 70 are intercepted by the spray water and deposited on the first partition 4, it is convenient for the spray water to flow on the first partition 4, thereby driving the solid particles to be discharged, reducing the subsequent cleaning pressure on the first partition 4, and improving convenience. The vertically arranged second plate 41 facilitates its cooperation with the inner wall of the tower body 1 to form a chamber for temporarily containing spray water, preventing spray water from accumulating on the surface of the first partition 4, ensuring the flow of spray water on the surface of the first partition 4, and thus improving the cleaning effect on solid particles on the surface of the first partition 4. Furthermore, the drain pipe 11 facilitates the recycling of the spray water after it has been absorbed by the spray system.

[0033] Example 8: This embodiment provides a tail gas spray absorption tower based on in-tower filtration, which, in addition to the technical solutions of the above embodiments, also has the following technical features: The spraying mechanism 8 includes multiple spray pipes 80 and multiple packing layers 81 arranged alternately from top to bottom; Among them, the spray pipe 80 is connected to a spray water supply device, which is a traditional spray absorption tower in the relevant technical field; Furthermore, the surface of the spray pipe 80 is provided with multiple spray nozzles, which is existing technology and is known to those skilled in the art from conventional spray pipes 80, so it will not be described in detail here.

[0034] As can be seen from this embodiment, by setting the spraying mechanism 8 to have multiple spray pipes 80 and multiple packing layers 81 arranged alternately from top to bottom, the contact between the exhaust gas and the spraying water is ensured, thereby effectively improving the spraying effect.

[0035] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A tail gas spray absorption tower based on in-tower filtration, characterized in that, include: The tower body (1) has a spray chamber (2) and a filter chamber (3) located below the spray chamber (2) inside. The first partition (4) is installed between the spray chamber (2) and the filter chamber (3) to isolate the spray chamber (2) and the filter chamber (3) to achieve dry and wet separation, and a connecting port (5) is opened for exhaust gas circulation only; The separation mechanism (6) is installed in the filter chamber (3) and is used to perform preliminary separation of solid particles carried in the exhaust gas; The filter mechanism (7) is installed at the communication port (5) of the first partition (4) and is used to perform secondary filtration on the exhaust gas after it has been processed by the separation mechanism (6), and to introduce the filtered exhaust gas into the spray chamber (2) through the communication port (5). The spraying mechanism (8) is installed in the spraying chamber (2) and is used for spraying and absorbing the filtered exhaust gas.

2. The tail gas spray absorption tower based on in-tower filtration according to claim 1, characterized in that, The separation mechanism (6) includes: The second partition (60) is installed in the filter chamber (3) and is used to divide the filter chamber (3) into an air inlet chamber (30) and an ash collection chamber (31). A first air inlet (9) is provided on the side of the tower body (1) located in the air inlet chamber (30) and a discharge outlet (10) is provided on the bottom surface of the ash collection chamber (31). The guide cylinder (61) is vertically installed on the lower end face of the second partition (60), and the second partition (60) has a second air inlet (62) that communicates with the inside of the guide cylinder (61); The air guide cylinder (63) is coaxially arranged with the material guide cylinder (61), and its bottom end extends into the material guide cylinder (61), and its top end extends to the inner wall of the first partition (4) and the connecting port (5) and is fixedly connected, and a protrusion (630) protruding from the second partition (60) is formed at the top end. The guide vane (64) is installed on the upper end face of the second baffle (60) and is used to guide the exhaust gas into the guide cylinder (61) in a spiral manner from the second air inlet (62); The guide vanes (64) are arranged in multiple circumferences, and the end of the guide cylinder (61) away from the air guide cylinder (63) forms a constricted neck (610).

3. The tail gas spray absorption tower based on in-tower filtration according to claim 2, characterized in that: Multiple feed cylinders (61) and air cylinders (63) are equally spaced on the second partition (60) along the radial surface of the tower body (1).

4. The tail gas spray absorption tower based on in-tower filtration according to claim 2, characterized in that: The surface of the air guide tube (63) is covered with a cover plate (65), and the cover plate (65) is used to restrict the exhaust gas from entering the guide vane (64) axially.

5. The tail gas spray absorption tower based on in-tower filtration according to claim 2, characterized in that: The filtration mechanism (7) includes a filter screen (70) disposed at the end of the air guide cylinder (63) away from the material guide cylinder (61). The filter screen (70) is provided with a dust removal mechanism (71) above it, which is used to clean the solid particles deposited on the filter screen (70). A guide hood (72) is installed on the dust removal mechanism (71) to prevent the falling spray water from entering the air guide cylinder (63) through the filter screen (70).

6. The tail gas spray absorption tower based on in-tower filtration according to claim 5, characterized in that, The dust removal mechanism (71) includes: An air duct (710) is installed inside the spray chamber (2) and located on the filter screen (70); Air nozzles (711) are connected to the lower end face of the air duct (710), and multiple nozzles are provided, each corresponding to a filter screen (70) on a multiple air duct (63); Connecting tube (712) is used for connection and internal communication between air guide tube (710) and air nozzle (711); Among them, the gas pipe (710) extends to the outside of the tower body (1) and is connected to the gas supply source.

7. The tail gas spray absorption tower based on in-tower filtration according to claim 1, characterized in that: The first partition (4) includes an inclined first plate (40) and a vertically arranged second plate (41). The connecting port (5) is opened on the first plate (40), and the first plate (40) is used to guide the spray water to the second plate (41), and a drain pipe (11) communicating with the spray chamber (2) is opened on the side of the tower body (1).

8. The tail gas spray absorption tower based on in-tower filtration according to claim 1, characterized in that: The spraying mechanism (8) includes multiple spray pipes (80) and multiple packing layers (81) arranged alternately from top to bottom.

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