Tobacco dust exhaust gas spray cleaning device

Abstract

The utility model relates to cigarette purification equipment technical field discloses tobacco dust waste gas spray purification device, this tobacco dust waste gas spray purification device includes spray case, first spray pipe and spray buffer subassembly, the nozzle direction of first spray pipe is toward air inlet, effectively intercepts dust and tar particle, more fast and completely carries out heat exchange with high temperature flue gas, and spray buffer subassembly sets up in purification area, the nozzle direction of second spray pipe is toward air outlet, captures the residual fine dust after processing in the washing area, the condensed tiny tar mist drop, and the buffer filler layer is used for capturing fine particulate matter and buffering airflow, promotes turbulent flow, promotes mass transfer and heat transfer efficiency, and third spray pipe is used for washing buffer filler layer, prevents the jam and influences purification, solves the problem that traditional multistage spray case function repeats and generalization layout brings low -efficiency purification, and the comprehensive purification removal rate of dust and waste gas is high, and the operation is stable, prolongs the life of device whole.

Description

Technical Field

[0001] This utility model relates to the technical field of cigarette purification equipment, and in particular to a tobacco dust exhaust gas spray purification device. Background Technology

[0002] In tobacco industry production, key processes such as tobacco processing and spinning generate a large amount of tobacco dust and waste gas. The main characteristics of this waste gas include medium and high temperature, high humidity, and high viscosity, which makes it difficult for single purification technologies to effectively remove tobacco dust and waste gas. As a result, equipment is prone to clogging and its processing efficiency declines rapidly.

[0003] To address the aforementioned issues, a common approach is to employ a multi-stage spray box series activated carbon adsorption process. This typically involves two or three stages of spray boxes with essentially identical structures, using circulating tap water at room temperature. By increasing the number of stages in series, the exhaust gas undergoes progressive physical scrubbing to achieve cooling, dust removal, and partial removal of water-soluble odors. However, this generic design prevents it from maximizing its efficiency, resulting in low overall purification efficiency and energy utilization. Furthermore, the impact of the tobacco dust exhaust gas flow leads to poor operational stability of the spray box.

[0004] Therefore, there is an urgent need for a tobacco dust exhaust gas spray purification device to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a tobacco dust exhaust gas spray purification device, which solves the problem of inefficient purification caused by the repetitive functions and universal layout of traditional multi-stage spray boxes. It has a high comprehensive purification and removal rate of dust and exhaust gas, stable operation, and extends the overall life of the device.

[0006] To address the aforementioned problems in the existing technology, this utility model adopts the following technical solution:

[0007] The tobacco dust exhaust gas spray purification device includes:

[0008] A spray box is provided with an air inlet and an air outlet. Along the air intake direction from the air inlet to the air outlet, a cleaning zone and a purification zone are arranged sequentially inside the spray box.

[0009] A first spray pipe is disposed on one side of the cleaning area, with the nozzle of the first spray pipe facing the air inlet.

[0010] A spray buffer assembly is disposed in the purification zone. The spray buffer assembly includes a buffer packing layer, a second spray pipe, and a third spray pipe. The second spray pipe is disposed on one side of the purification zone, with its nozzles facing the air outlet. The buffer packing layer is disposed on the other side of the purification zone and is used to capture fine particulate matter and buffer airflow. The third spray pipe is disposed on top of the buffer packing layer and is used to rinse the buffer packing layer.

[0011] As an optional technical solution, a first demister is also included. The first demister is located in the cleaning area and is disposed between the first spray pipe and the second spray pipe, for capturing large viscous droplets.

[0012] As an optional technical solution, a second demister is also included. The spray box is further provided with a demisting zone, which is located between the purification zone and the air outlet. The second demister is disposed in the demisting zone and is used to capture small viscous droplets.

[0013] As an optional technical solution, a fourth spray pipe is also included, which is disposed at the top of the cleaning zone and is used to clean the airflow.

[0014] As an optional technical solution, the buffer packing layer includes a plurality of plastic balls, which are arranged in a matrix and have gas-liquid channels between adjacent plastic balls.

[0015] As an optional technical solution, there are multiple spray buffer components and multiple purification zones, with each spray buffer component corresponding to one of the multiple purification zones.

[0016] As an optional technical solution, a circulation component is also included, which includes a water tank and a fifth spray pipe. The water tank is connected to the bottom of the spray box, and the fifth spray pipe is disposed inside the water tank and used to rinse the water tank.

[0017] As an optional technical solution, there are multiple circulation components, and each of the multiple circulation components is respectively set to correspond one-to-one with the cleaning zone and the purification zone.

[0018] As an optional technical solution, an inspection door is also included. The spray box has an inspection port, and the inspection door is located at the inspection port and is used to open or close the inspection port.

[0019] As an optional technical solution, the spray box has a horizontal structure.

[0020] The tobacco dust exhaust gas spray purification device provided by this utility model has at least the following beneficial effects:

[0021] This tobacco dust exhaust gas spray purification device includes a spray box, a first spray pipe, and a spray buffer assembly. Along the air intake direction from the inlet to the outlet, the spray box contains a cleaning zone and a purification zone. The first spray pipe is located on one side of the cleaning zone, with its nozzles facing the inlet, effectively intercepting dust and tar particles and facilitating faster and more thorough heat exchange with the high-temperature flue gas. The spray buffer assembly is located in the purification zone and includes a buffer packing layer, a second spray pipe, and a third spray pipe. The second spray pipe is located on one side of the purification zone, with its nozzles facing the outlet, capturing residual fine dust, condensed fine tar droplets, and some water-soluble odor molecules after the cleaning zone treatment. This also reduces the overall energy consumption and pressure loss of the device. The buffer packing layer is located on the other side of the purification zone and is used to capture fine particulate matter and buffer the airflow, further adsorbing and removing fine particulate matter. It also buffers airflow impact, promotes turbulence, improves mass and heat transfer efficiency, and makes operation more stable. The third spray pipe is located at the top of the buffer packing layer and is used to flush the buffer packing layer, preventing it from becoming clogged and affecting purification. It also allows the rising exhaust gas within the buffer packing layer to come into contact with the gas, promoting absorption. This solves the problem of inefficient purification caused by the repetitive and generic layout of traditional multi-stage spray boxes. It achieves a high comprehensive purification and removal rate for dust and exhaust gas, stable operation, and extends the overall lifespan of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the tobacco dust exhaust gas spray purification device in the embodiment of this utility model.

[0023] In the picture:

[0024] 1. Spray box; 11. Air inlet; 12. Air outlet; 13. Cleaning area; 14. Purification area; 15. Demisting area;

[0025] 2. First spray pipe;

[0026] 3. Spray buffer assembly; 31. Buffer packing layer; 32. Second spray pipe; 33. Third spray pipe;

[0027] 4. First demister;

[0028] 5. Second demister;

[0029] 6. Fourth spray pipe;

[0030] 7. Circulation component; 71. Water tank; 72. Fifth spray pipe;

[0031] 8. Inspection port. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] like Figure 1As shown, this embodiment provides a tobacco dust exhaust gas spray purification device, which includes a spray box 1, a first spray pipe 2, and a spray buffer assembly 3. The spray box 1 has an air inlet 11 and an air outlet 12. Along the air inlet direction from the air inlet 11 to the air outlet 12, a cleaning zone 13 and a purification zone 14 are sequentially arranged inside the spray box 1. The first spray pipe 2 is located on one side of the cleaning zone 13, with the nozzle of the first spray pipe 2 facing the air inlet 11. The spray buffer assembly 3 is disposed in the purification zone 14. The spray buffer assembly 3 includes a buffer packing layer 31, a second spray pipe 32 and a third spray pipe 33. The second spray pipe 32 is disposed on one side of the purification zone 14, and the nozzle direction of the second spray pipe 32 is towards the air outlet 12. The buffer packing layer 31 is disposed on the other side of the purification zone 14 and is used to capture fine particulate matter and buffer the airflow. The third spray pipe 33 is disposed on the top of the buffer packing layer 31 and is used to rinse the buffer packing layer 31.

[0037] The spray box 1 has a receiving cavity, which is divided into a cleaning zone 13 and a purification zone 14. Tobacco dust and exhaust gas enter through the air inlet 11, pass through the cleaning zone 13 and the purification zone 14 in sequence, and are finally discharged through the air outlet 12. The first spray pipe 2 has a vertical structure and is fixedly installed on the side of the cleaning zone 13 away from the air inlet 11. The first spray pipe 2 sprays countercurrently, so that the water mist sprayed from the first spray pipe 2 collides head-on with the smoke gas, generating violent collision, shearing and turbulence. The gas-liquid contact area and contact time are maximized, effectively intercepting dust and tar particles, and exchanging heat with the high-temperature smoke gas more quickly and thoroughly, thereby achieving effective cooling.

[0038] The second spray pipe 32 is vertically oriented and fixedly installed in the purification zone 14 near the first spray pipe 2. The second spray pipe 32 uses a medium-flow, high-atomization spiral nozzle to generate a fine water mist, increasing the gas-liquid contact area. The second spray pipe 32 sprays the purification zone 14, capturing residual fine dust, condensed fine tar droplets, and some water-soluble odor molecules after treatment in the cleaning zone 13. Furthermore, the second spray pipe 32 sprays in a co-current manner, reducing the overall energy consumption and pressure loss of the device, while also reducing the possibility of droplets being entrained by the airflow.

[0039] The buffer packing layer 31 has a vertical structure. Located in the purification zone 14 and spaced apart from the second spray pipe 32, the buffer packing layer 31 captures tar particles and tobacco dust within the purification zone 14, further adsorbing and removing fine particulate matter. It also buffers airflow impact, promotes turbulence, improves mass and heat transfer efficiency, and ensures more stable operation, providing optimal conditions for subsequent adsorption processes such as activated carbon and zeolite. A third spray pipe 33 is located at the top of the buffer packing layer 31. This third spray pipe 33 evenly and comprehensively covers the entire cross-section of the buffer packing layer 31, continuously rinsing it to prevent clogging and ensure effective purification. Furthermore, the third spray pipe 33 contacts the rising exhaust gas within the buffer packing layer 31 to promote absorption.

[0040] The working principle of this tobacco dust and exhaust gas spray purification device is as follows: First, tobacco dust and exhaust gas enter through the air inlet 11 of the spray box 1. In the cleaning zone 13, the first spray pipe 2 can collide head-on with the exhaust gas, generating violent collisions, shearing, and turbulence, effectively intercepting dust and tar particles, and exchanging heat with the high-temperature exhaust gas more quickly and thoroughly. Second, in the purification zone 14, the second spray pipe 32 captures residual fine dust, condensed fine tar droplets, and some water-soluble odor molecules after the treatment in the cleaning zone 13. Then, the buffer packing layer 31 can capture tar particles and tobacco dust in the purification zone 14, further adsorbing and removing fine particulate matter. It can also buffer the airflow impact and promote turbulence. At the same time, the third spray pipe 33 can continuously rinse the buffer packing layer 31 to prevent blockage and to contact the rising exhaust gas to promote absorption. Finally, it is discharged through the air outlet 12 of the spray box 1. It solves the problem of inefficient purification caused by the repetitive functions and generalized layout of traditional multi-stage spray boxes. It has a high comprehensive purification and removal rate of dust and exhaust gas, stable operation, and extends the overall life of the device.

[0041] Furthermore, referring to Figure 1 It also includes a first demister 4, which is located in the cleaning zone 13 and positioned between the first spray pipe 2 and the second spray pipe 32. The first demister 4 is used to capture large, sticky droplets. The first demister 4 is configured as a baffle demister, with the first spray pipe 2 and the second spray pipe 32 respectively located on its left and right sides. The first demister 4 can effectively remove dust, intercept large droplets and sticky pollutants, and protect the spray components of the purification zone 14.

[0042] Furthermore, referring to Figure 1It also includes a second demister 5, and the spray box 1 is further provided with a demister zone 15, which is located between the purification zone 14 and the air outlet 12. The second demister 5 is located in the demister zone 15 and is used to capture small particulate viscous droplets. The second demister 5 is a cotton demister, which captures the fine mist generated in the cleaning zone 13 and the purification zone 14, removes viscous droplets, and prevents the aforementioned fine mist and viscous droplets from entering the subsequent fan and activated carbon box through the air outlet 12, thus protecting the fan from water corrosion. The exhaust gas discharged by this device reaches the optimal balance point of temperature, humidity and cleanliness, significantly extending its replacement cycle and thereby reducing the cost of core consumables.

[0043] Furthermore, referring to Figure 1 It also includes a fourth spray pipe 6, which is located at the top of the cleaning zone 13 and is used to clean the airflow. The fourth spray pipe 6 uses a large-flow, large-diameter spiral nozzle to spray and form a "water curtain", thereby performing a "cap-like" cleaning of the airflow that rises into the cleaning zone 13 through the air inlet, resulting in a good cleaning effect.

[0044] Furthermore, referring to Figure 1 The buffer packing layer 31 comprises multiple plastic spheres arranged in a matrix, with gas-liquid channels between adjacent spheres. The buffer packing layer 31 is filled with multiple multifaceted hollow plastic spheres, forming a dense, tortuous network—a meandering network of gas-liquid channels—increasing the gas-liquid contact area, promoting turbulence, and thus improving mass and heat transfer efficiency, capturing sticky tar particles and tobacco dust. Furthermore, the buffer packing layer 31 can buffer airflow impact, resulting in more stable operation and providing optimal conditions for subsequent adsorption processes such as activated carbon and zeolite.

[0045] Furthermore, referring to Figure 1 There are multiple spray buffer components 3 and purification zones 14, with each spray buffer component 3 corresponding to a specific purification zone 14. Multiple purification zones 14 are located between the cleaning zone 13 and the demisting zone 15. Each purification zone 14 contains a spray buffer component 3. Along the airflow direction of the flue gas, the nozzle flow rate and orifice diameter of the second spray pipe 32 corresponding to the sequentially arranged purification zones 14 gradually decrease, resulting in increasingly fine water mist. This allows each purification zone 14 to fulfill its specific function, progressively cooling and removing dust while working collaboratively. Only the first-stage purification zone 14 requires high energy consumption and high flow rate operation, while subsequent multi-stage purification zones 14 are relatively energy-efficient. The packing density of the buffer packing layer 31 corresponding to the sequentially arranged purification zones 14 gradually decreases, preventing clogging risks in each purification zone 14. The clogging risk is concentrated and isolated in the first-stage purification zone 14, facilitating management and maintenance, extending the overall lifespan of the device, and reducing downtime.

[0046] Furthermore, referring to Figure 1It also includes a circulation component 7, which includes a water tank 71 and a fifth spray pipe 72. The water tank 71 is connected to the bottom of the spray box 1, and the fifth spray pipe 72 is located inside the water tank 71 and is used to rinse the water tank 71.

[0047] There are multiple circulation components 7, each corresponding to a cleaning zone 13 and a purification zone 14. A corresponding water tank 71 is located below the cleaning zone 13, the multiple purification zones 14, and the demisting zone 15. The outlet of the water tank 71 is connected to the purification device via a pipe, and the purification device is connected to each spray pipe via a pipe. The water tank 71 is used to collect and recycle the water sprayed from the spray pipes, and then centrally circulate it back to each spray pipe for use through the purification device. The fifth spray pipe 72 can rinse the water tank 71, preventing the highly viscous and easily sedimented tobacco dust from settling and forming scale, thus reducing the difficulty of later maintenance and cleaning of the water tank 71.

[0048] Furthermore, referring to Figure 1 It also includes an inspection door. The spray box 1 has an inspection port 8, and the inspection door is located at the inspection port 8 and is used to open or close the inspection port 8.

[0049] The spray box 1 has a horizontal structure. Targeting the high viscosity and easy clogging characteristics of tobacco exhaust gas, the spray box 1 adopts a low-lying horizontal layout, suitable for confined spaces such as outdoor rooftops and attics. An inspection port 8 is provided on the side of the spray box 1, allowing maintenance personnel to easily enter the interior and directly and quickly clean or replace the internal spray pipes and buffer packing layer 31. This greatly reduces the risks and difficulty of working in confined spaces and significantly improves the continuous operation capability and maintenance efficiency of the device.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tobacco dust exhaust gas spray purification device, characterized in that, include: The spray box (1) has an air inlet (11) and an air outlet (12). Along the air inlet (11) to the air outlet (12), the spray box (1) is provided with a cleaning zone (13) and a purification zone (14) in sequence. The first spray pipe (2) is disposed on one side of the cleaning area (13), and the nozzle of the first spray pipe (2) is directed toward the air inlet (11). A spray buffer assembly (3) is disposed in the purification zone (14). The spray buffer assembly (3) includes a buffer packing layer (31), a second spray pipe (32) and a third spray pipe (33). The second spray pipe (32) is disposed on one side of the purification zone (14) and the nozzle direction of the second spray pipe (32) is towards the air outlet (12). The buffer packing layer (31) is disposed on the other side of the purification zone (14) and is used to capture fine particulate matter and buffer airflow. The third spray pipe (33) is disposed on top of the buffer packing layer (31) and is used to rinse the buffer packing layer (31).

2. The tobacco dust exhaust gas spray purification device according to claim 1, characterized in that, It also includes a first demister (4), which is located in the cleaning zone (13) and is disposed between the first spray pipe (2) and the second spray pipe (32) for capturing large viscous droplets.

3. The tobacco dust exhaust gas spray purification device according to claim 1, characterized in that, It also includes a second demister (5), and the spray box (1) is also provided with a demisting zone (15), which is located between the purification zone (14) and the air outlet (12). The second demister (5) is provided in the demisting zone (15) to capture small particulate viscous droplets.

4. The tobacco dust exhaust gas spray purification device according to claim 1, characterized in that, It also includes a fourth spray pipe (6), which is located at the top of the cleaning zone (13) and is used to clean the airflow.

5. The tobacco dust exhaust gas spray purification device according to claim 1, characterized in that, The buffer packing layer (31) includes a plurality of plastic balls, which are arranged in a matrix and have gas-liquid channels between adjacent plastic balls.

6. The tobacco dust exhaust gas spray purification device according to claim 1, characterized in that, There are multiple spray buffer components (3) and multiple purification zones (14), with each spray buffer component (3) and purification zone (14) corresponding to one another.

7. The tobacco dust exhaust gas spray purification device according to claim 1, characterized in that, It also includes a circulation component (7), which includes a water tank (71) and a fifth spray pipe (72). The water tank (71) is connected to the bottom of the spray box (1), and the fifth spray pipe (72) is located inside the water tank (71) and is used to rinse the water tank (71).

8. The tobacco dust exhaust gas spray purification device according to claim 7, characterized in that, There are multiple circulation components (7), and each circulation component (7) is respectively set to correspond one-to-one with the cleaning zone (13) and the purification zone (14).

9. The tobacco dust exhaust gas spray purification device according to claim 1, characterized in that, It also includes an inspection door, on which an inspection port (8) is provided. The inspection door is located at the inspection port (8) and is used to open or close the inspection port (8).

10. The tobacco dust exhaust gas spray purification device according to claim 1, characterized in that, The spray box (1) has a horizontal structure.

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