Water curtain dust collector

Abstract

This utility model relates to the field of dust collector technology, and in particular to a water curtain dust collector, comprising a tower body, a Venturi tube connected to the lower side wall of the tower body, a screen installed on the inner side of the lower part of the tower body, several baffles installed below the screen, and a water collection tank connected to the lower end of the tower body. Both the screen and the baffles are hollow. A sedimentation tank is connected to the water collection tank. The upper outer wall of the sedimentation tank is connected to the screen and baffles via a water supply and heating pipeline. The outlets of the screen and baffles are connected to the water collection tank via a return water pipeline. This water curtain dust collector, by using a hollow screen and baffles and constructing a water circulation heating system using a water collection tank, sedimentation tank, water supply and heating pipeline, and return water pipeline, achieves several advantages. Firstly, the heated circulating water flows within the screen and baffles, increasing their surface temperature and effectively preventing the solidification and accumulation of sticky particles due to temperature reduction, thus solving the problem of flow channel blockage and extending the equipment maintenance cycle.

Description

Technical Field

[0001] This utility model relates to the field of dust collector technology, and in particular to a water curtain dust collector. Background Technology

[0002] In the production of starch and starch sugars, the flue gas generated during drying, feeding, and other processes contains a large amount of water-soluble viscous particulate matter (such as crystalline glucose, fructose, gluconate, etc.). This highly viscous material not only reduces product yield but also poses a challenge due to environmental emission requirements (particulate matter concentration ≤30mg / m³). Currently, commonly used dust removal technologies in this field include spray dust collection, water curtain dust collection, and cyclone dust collection. However, single technologies suffer from insufficient efficiency or clogging issues, while combined technologies face challenges of high investment and energy consumption. Therefore, an integrated solution that balances high efficiency and anti-sticking properties is urgently needed.

[0003] In the prior art, patent CN218475066U discloses a Venturi water curtain dust collector, which achieves multi-stage capture of particulate matter in flue gas through a combination design of Venturi inlet pipe, baffle plate, and sieve plate. This technology sets staggered baffles on the baffle plate and optimizes the water curtain distribution through the slope of the sieve plate and variable density sieve holes, thus improving dust removal efficiency to a certain extent, and is particularly suitable for treating flue gas containing sticky particles in starch sugar production.

[0004] However, the above-mentioned existing technologies still have the following shortcomings: 1. They do not have an active heating anti-sticking structure designed for the crystallization and adhesion characteristics of sticky particles. When processing high concentrations of sticky particles, the Venturi inlet pipe, baffle plate and sieve plate are prone to blockage due to particle solidification and accumulation, resulting in short equipment maintenance cycles; 2. They do not have a water circulation system, resulting in large water consumption and increased operating costs. Utility Model Content

[0005] To address the problems of current dust collectors, such as easy blockage of flow channels due to particle solidification and accumulation on the inner surface, short equipment maintenance cycles, and increased costs due to lack of water recycling, this utility model provides a water curtain dust collector.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0007] A water curtain dust collector includes a tower body with a Venturi tube connected to the lower side wall. A screen is installed on the inner side of the lower part of the tower body, and several baffles are installed below the screen. A water collection tank is connected to the lower end of the tower body. Both the screen and the baffles are hollow. A sedimentation tank is connected to the water collection tank. The upper outer wall of the sedimentation tank is connected to the screen and baffles through a water supply and heating pipeline. The water outlets of the screen and baffles are connected to the water collection tank through a return water pipeline. This water curtain dust collector, by using the hollow screen and baffles and constructing a water circulation heating system using the water collection tank, sedimentation tank, water supply and heating pipeline, and return water pipeline, achieves several benefits. First, the heated circulating water flows within the screen and baffles, increasing their surface temperature and effectively preventing sticky particles from solidifying and accumulating due to temperature reduction, thus solving the problem of flow channel blockage and extending the equipment maintenance cycle. Second, it realizes the recycling of water resources, reduces the amount of fresh water replenishment, lowers operating costs, avoids the discharge of large amounts of wastewater, reduces the burden of environmental treatment, and achieves multiple effects such as high-efficiency dust removal, energy saving and consumption reduction, and stable operation.

[0008] Preferably, the screen comprises a hollow disc-shaped shell; several connecting pipes are disposed inside the disc-shaped shell; and an inlet pipe and an outlet pipe are disposed on the side wall of the disc-shaped shell. This screen, with its hollow disc-shaped shell and internal connecting pipes, can construct a highly efficient water circulation heating system through the inlet and outlet pipes: the hollow cavity of the disc-shaped shell provides flow space for circulating water, while the internal connecting pipes ensure the passage of flue gas, allowing heat to be evenly distributed to all areas of the screen, preventing localized low temperatures that could lead to the solidification and accumulation of sticky particles; the inlet and outlet pipes ensure stable circulating water flow, enhance heat exchange efficiency, and maintain the screen surface temperature above the melting point of sticky particles, effectively solving the screen clogging problem in existing technologies.

[0009] Preferably, the baffle comprises a hollow main body; the main body is generally wavy; and a second water inlet pipe and a second water outlet pipe are respectively provided on the upper and lower parts of one side of the main body. This baffle, with its hollow wavy main body structure and independent second water inlet and outlet pipes, possesses significant technical advantages. Firstly, the wavy shape increases the contact area between the flue gas and the baffle, causing multi-scale vortices to form as the flue gas passes through, extending the residence time and enhancing the capture effect of sticky particles. Secondly, the hollow structure and the placement of the inlet and outlet pipes facilitate the introduction of heated circulating water. Through the water circulation within the main body, the surface of the baffle maintains a high temperature, preventing sticky particles from adhering and accumulating due to cooling and solidification, effectively solving the clogging problem. Furthermore, this design can work in conjunction with a water supply and heating pipeline to achieve water resource recycling, reduce energy consumption and operating costs, and ensure the long-term stable and efficient operation of the dust removal equipment.

[0010] Preferably, the diffuser of the Venturi tube is fitted with a heating tube; the inner wall of the diffuser tube is provided with a protrusion to match the heating tube. The combination of the heating tube and the protrusion on the inner wall of the Venturi tube diffuser achieves a dual anti-sticking dust removal effect: the heating tube continuously heats the outer wall of the diffuser tube, maintaining the inner wall temperature above the melting point of sticky particles, preventing particles from adhering due to cooling and solidification; the protrusion on the inner wall not only promotes the collision and agglomeration of droplets and particles in the flue gas to form large particles that settle, but also utilizes the heat conducted by the heating tube to maintain the surface of the protrusion at a high temperature, preventing secondary adhesion and accumulation of settled particles. This design not only enhances the dust removal efficiency of the Venturi tube, but also solves the problem of easy clogging of the diffuser tube in existing technologies through the heating and anti-sticking structure. Furthermore, it is linked with the water supply heating pipeline to achieve rational utilization of heat, reducing energy consumption and maintenance costs.

[0011] Preferably, the heating pipe is arranged in a spiral shape; the inlet end of the heating pipe is connected to the water supply heating pipe, and the outlet end of the heating pipe is connected to the water collection tank. The spiral structure can extend the flow path of the circulating water in the heating pipe, enhance the heat exchange efficiency with the outer wall of the diffuser, and keep the surface temperature of the diffuser at a uniform 50-60℃, effectively preventing the solidification and adhesion of sticky particles; the connection design with the water supply heating pipe and the water collection tank forms a closed-loop system of "heating-circulation-reuse". On the one hand, the circulating water heated by the sedimentation tank is used to continuously supply heat, avoiding heat waste; on the other hand, the turbulence effect generated by the spiral flow of water can enhance heat conduction, improving the heat exchange efficiency by more than 30% compared with the straight pipe structure.

[0012] Preferably, the water inlet pipe of the venturi tube is connected to a water spray pipe; the water spray pipe is connected to a rotary drive assembly. The rotary drive assembly drives the water spray pipe to rotate 360° to spray water, forming a dynamically uniform water curtain at the throat of the venturi tube. Compared with the traditional fixed water spray structure, the water mist coverage area is increased by more than 2 times, and the probability of collision with sticky particles in the flue gas is increased by 40%. The rotating water spray can continuously scour the inner wall of the venturi tube, and with the wall temperature maintained by the heating pipe, it can effectively prevent the adhesion and accumulation of particles, solving the problems of easy clogging of nozzles and uneven water curtain distribution in the prior art. In addition, this structure is linked with the water circulation system to realize the recycling of water resources. The centrifugal force generated by the rotation can also refine the water mist particle size to 2-5μm, further enhancing the capture effect of fine particles, increasing the dust removal efficiency to over 95%, while reducing the frequency of equipment maintenance and operating costs.

[0013] Preferably, the water inlet pipe is connected to the spray pipe via a rotary joint; the spray pipe is rotatably mounted inside the sleeve; the sleeve is mounted on the inner wall of the venturi tube via a support rod. The rotary joint allows the spray pipe to rotate freely 360°, and together with the guiding effect of the sleeve, ensures that the spray trajectory evenly covers the entire circumference of the venturi tube throat, improving the uniformity of water mist distribution; the sleeve is fixed to the inner wall by the support rod, providing rigid support for the spray pipe and maintaining stability in high-speed airflow, avoiding spray deviation caused by vibration; this design allows the heated circulating water to form a dynamic water curtain through the rotating spray pipe, continuously scouring the inner wall of the venturi tube. Combined with the temperature control effect of the outer wall heating pipe, it can effectively prevent the adhesion and accumulation of sticky particles. At the same time, the centrifugal force generated by the rotating spray refines the water mist to 1-3μm, enhancing the collision and agglomeration efficiency with dust, improving the dust removal efficiency compared to the traditional fixed spray structure, and extending the equipment maintenance cycle to more than 6 months.

[0014] Preferably, the rotary drive assembly includes a bevel gear one keyed to the outer wall of the spray pipe; bevel gear one meshing with bevel gear two; bevel gear two keyed to a drive shaft; the drive shaft is rotatably mounted on the outer wall of the venturi tube; and a motor is connected to the drive shaft after it passes through the venturi tube. The meshing transmission of bevel gear one and bevel gear two can convert the axial power of the motor into the circumferential rotational motion of the spray pipe.

[0015] Preferably, the water supply and heating pipeline includes a pipe; a water supply pump is installed on the pipe; a heating sleeve is also installed on the pipe; the pipe is connected to the upper outer wall of the sedimentation tank, and a filter screen is installed at the connection between the pipe and the sedimentation tank; a water supply pipe is connected to the sedimentation tank; and a drain pipe is connected to the lower outer wall of the sedimentation tank. The water supply pump provides power for the circulating water; the filter screen at the connection between the sedimentation tank and the pipe intercepts suspended solids and crystal particles in the water, preventing blockage of the heating pipeline; the water supply pipe and the drain pipe work together to maintain the water level and water quality in the sedimentation tank. When the concentration of the circulating water is too high, the drain pipe discharges some high-concentration waste liquid, and the water supply pipe replenishes fresh water, ensuring long-term stable operation of the system. This design increases the water resource recycling rate to over 95%, reduces heating energy consumption by 40%, and reduces equipment blockage frequency by 80%, achieving multiple benefits of energy saving, anti-sticking, and efficient dust removal.

[0016] Preferably, the heating sleeve includes a cylindrical shell; several heating elements are evenly arranged along the circumference inside the cylindrical shell. The heating sleeve's design, featuring a cylindrical shell and circumferentially distributed heating elements, achieves efficient and uniform heating: the cylindrical shell tightly encloses the water supply heating pipe, providing installation space for the heating elements while forming a closed heating chamber, reducing heat loss; the evenly arranged heating elements along the circumference can heat the circulating water inside the pipe from multiple angles.

[0017] The beneficial effects of this utility model are:

[0018] This water curtain dust collector utilizes a hollow design for the screens and baffles, and incorporates a water circulation heating system consisting of a collection tank, sedimentation tank, water supply heating pipeline, and return water pipeline. On one hand, the heated circulating water flows within the screens and baffles, raising their surface temperature and effectively preventing sticky particles from solidifying and accumulating due to temperature drops, thus solving the problem of flow channel blockage and extending equipment maintenance cycles. On the other hand, it achieves water resource recycling, reducing the amount of fresh water replenishment, lowering operating costs, and avoiding large amounts of wastewater discharge, thus reducing the burden on environmental protection and achieving multiple benefits such as high-efficiency dust removal, energy saving, and stable operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a schematic diagram of the tower body and venturi tube of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the baffle of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the heating sleeve of this utility model.

[0024] In the diagram: 1-Tower body, 2-Venturi tube, 3-Screen, 4-Baffle, 5-Water collection tank, 6-Sedimentation tank, 7-Heating tube, 8-Bevel gear one, 9-Bevel gear two, 10-Drive shaft, 11-Motor, 12-Pipe, 13-Water supply pump, 14-Heating sleeve, 15-Water supply pipe, 16-Drainage pipe;

[0025] 201-Diffuser tube, 202-Boss, 203-Inlet pipe three, 204-Spray pipe, 205-Rotary joint, 206-Sleeve, 207-Support rod; 301-Inlet pipe one, 302-Outlet pipe one, 303-Disc-shaped shell, 304-Connecting pipe; 401-Main body, 402-Inlet pipe two, 403-Outlet pipe two; 1401-Cylindrical shell, 1402-Heating element. Detailed Implementation

[0026] The present invention will now be described and explained in detail with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figure 1 and Figure 3As shown, a water curtain dust collector includes a tower body 1, a Venturi tube 2 connected to the lower side wall of the tower body 1, a screen 3 installed on the lower inner side of the tower body 1, several baffles 4 installed below the screen 3, and a water collection tank 5 connected to the lower end of the tower body 1. The screen 3 and baffles 4 are hollow. The water collection tank 5 is connected to a sedimentation tank 6. The upper outer wall of the sedimentation tank 6 is connected to the screen 3 and baffles 4 via a water supply and heating pipeline. The outlets of the screen 3 and baffles 4 are connected to the water collection tank 5 via a return water pipeline. The water supply and heating pipeline includes a pipe 12; a water pump 13 is installed on the pipe 12; a heating sleeve 14 is also installed on the pipe 12; the pipe 12 is connected to the upper outer wall of the sedimentation tank 6, and a filter screen is installed at the connection between the pipe 12 and the sedimentation tank 6; a water supply pipe 15 is connected to the sedimentation tank 6; and a drain pipe 16 is connected to the lower outer wall of the sedimentation tank 6.

[0029] This water curtain dust collector utilizes a hollow screen 3 and baffle 4, and a water circulation heating system constructed with a water collection tank 5, a sedimentation tank 6, a water supply heating pipeline, and a return water pipeline. On one hand, the heated circulating water flows within the screen 3 and baffle 4, increasing their surface temperature and effectively preventing the solidification and accumulation of sticky particles due to temperature reduction, thus solving the problem of flow channel blockage and extending equipment maintenance cycles. On the other hand, it achieves water resource recycling, reducing the amount of fresh water replenishment, lowering operating costs, and avoiding large amounts of wastewater discharge, thus reducing the burden on environmental protection and achieving multiple benefits of efficient dust removal, energy saving, and stable operation. The water supply pump 13 provides power to the circulating water; the filter screen at the connection between the sedimentation tank 6 and the pipeline 12 intercepts suspended solids and crystalline particles in the water, preventing blockage of the heating pipeline; the water supply pipe 15 and the drainage pipe 16 work together to maintain the water level and quality in the sedimentation tank 6. When the circulating water concentration is too high, the drainage pipe 16 discharges some high-concentration waste liquid, and the water supply pipe 15 replenishes fresh water, ensuring long-term stable operation of the system. This design increases water recycling rate to over 95%, reduces heating energy consumption by 40%, and reduces equipment clogging frequency by 80%, achieving multiple benefits of energy saving, anti-sticking, and efficient dust removal.

[0030] In the above configuration, the diffuser 201 of the Venturi tube 2 is fitted with a heating tube 7; the inner wall of the diffuser 201 is provided with a boss 202 to fit the heating tube 7. The heating tube 7 is spirally arranged; the inlet end of the heating tube 7 is connected to the water supply heating pipeline, and the outlet end of the heating tube 7 is connected to the water collection tank 5. The inlet pipe 203 of the Venturi tube 2 is connected to a spray pipe 204; the spray pipe 204 is connected to a rotary drive assembly.

[0031] The Venturi tube 2's diffuser 201 is fitted with a heating tube 7, and a protrusion 202 is provided on its inner wall. This achieves a dual anti-sticking dust removal effect: the heating tube 7 continuously heats the outer wall of the diffuser 201, maintaining the inner wall temperature above the melting point of sticky particles, preventing particles from adhering due to cooling and solidification; the inner wall protrusion 202 not only promotes the collision and agglomeration of droplets and particles in the flue gas to form large particles that settle, but also uses the heat conducted by the heating tube 7 to keep the surface of the protrusion 202 at a high temperature, preventing secondary adhesion and accumulation of settled particles. This design not only enhances the dust removal efficiency of the Venturi tube 2, but also solves the problem of easy clogging of the diffuser 201 in the prior art through the heating and anti-sticking structure. At the same time, it is linked with the water supply heating pipeline to achieve rational utilization of heat, reducing energy consumption and maintenance costs. The spiral structure extends the flow path of circulating water within the heating pipe 7, enhancing the heat exchange efficiency with the outer wall of the diffuser 201. This maintains the surface temperature of the diffuser 201 at a uniform 50-60℃, effectively preventing the solidification and adhesion of sticky particles. The connection design with the water supply heating pipe and the water collection tank 5 forms a closed-loop system of "heating-circulation-reuse." On the one hand, it utilizes the circulating water heated by the sedimentation tank 6 to continuously supply heat, avoiding heat waste. On the other hand, the turbulence effect generated by the spiral flow of water can enhance heat conduction, improving the heat exchange efficiency by more than 30% compared to the straight pipe structure. The rotary drive assembly drives the water spray pipe 204 to rotate 360°, creating a dynamically uniform water curtain at the throat of the venturi tube 2. Compared to the traditional fixed water spray structure, the water mist coverage area is increased by more than 2 times, and the probability of collision with sticky particles in the flue gas is increased by 40%. The rotating water spray can continuously scour the inner wall of the venturi tube 2. Combined with the pipe wall temperature maintained by the heating pipe 7, it effectively prevents the adhesion and accumulation of particles, solving the problems of easy clogging of nozzles and uneven water curtain distribution in the existing technology. In addition, this structure is linked with the water circulation system to realize the recycling of water resources. The centrifugal force generated by the rotation can also refine the water mist particle size to 2-5μm, further enhancing the capture effect of fine particles and increasing the dust removal efficiency to over 95%, while reducing the frequency of equipment maintenance and operating costs.

[0032] like Figure 2As shown, the water inlet pipe 203 is connected to the spray pipe 204 via a rotary joint 205; the spray pipe 204 is rotatably mounted inside the sleeve 206; the sleeve 206 is mounted on the inner wall of the venturi tube 2 via a support rod 207. The rotary drive assembly includes a bevel gear 8 keyed to the outer wall of the spray pipe 204; bevel gear 8 meshes with a bevel gear 9; bevel gear 9 is keyed to the drive shaft 10; the drive shaft 10 is rotatably mounted on the outer wall of the venturi tube 2; the drive shaft 10 passes through the venturi tube 2 and is connected to a motor 11. The rotary joint 205 allows the water spray pipe 204 to rotate freely 360°. Combined with the guiding effect of the sleeve 206, this ensures the water spray trajectory evenly covers the entire circumference of the venturi tube 2 throat, improving the uniformity of water mist distribution. The sleeve 206 is fixed to the inner wall by the support rod 207, providing rigid support for the water spray pipe 204 and maintaining stability in high-speed airflow, preventing spray deviation due to vibration. This design allows heated circulating water to form a dynamic water curtain through the rotating water spray pipe 204, continuously flushing the inner wall of the venturi tube 2. Combined with the temperature control effect of the outer wall heating pipe 7, this effectively prevents the adhesion and accumulation of sticky particles. Simultaneously, the centrifugal force generated by the rotating water spray refines the water mist to 1-3μm, enhancing the collision and agglomeration efficiency with dust. This improves dust removal efficiency compared to traditional fixed water spray structures and extends the equipment maintenance cycle to more than 6 months. The meshing transmission of bevel gear 8 and bevel gear 9 converts the axial power of the motor 11 into the circumferential rotational motion of the water spray pipe 204.

[0033] like Figure 1 and Figure 4 As shown, the screen 3 includes a hollow disc-shaped shell 303; several connecting pipes 304 are provided inside the disc-shaped shell 303; a water inlet pipe 301 and a water outlet pipe 302 are provided on the side wall of the disc-shaped shell. The baffle 4 includes a hollow main body 401; the main body 401 is generally wavy; a second water inlet pipe 402 and a second water outlet pipe 403 are respectively provided on the upper and lower parts of one side of the main body 401.

[0034] The screen 3 adopts a hollow disc-shaped shell 303 with an internal connecting pipe 304. It can form a high-efficiency water circulation heating system through the inlet pipe 301 and outlet pipe 302. The hollow cavity of the disc-shaped shell 303 provides flow space for circulating water, while the internal connecting pipe 304 ensures the passage of flue gas, allowing heat to be evenly distributed to all areas of the screen 3, preventing localized low temperatures that could lead to the solidification and accumulation of sticky particles. The inlet pipe 301 and outlet pipe 302 ensure stable circulating water flow, enhance heat exchange efficiency, and maintain the surface temperature of the screen 3 above the melting point of sticky particles, effectively solving the screen clogging problem in existing technologies. The baffle 4 adopts a hollow, wave-shaped main body 401 structure and is equipped with independent inlet pipe 402 and outlet pipe 403, possessing significant technical advantages. On the one hand, the wavy shape design increases the contact area between the flue gas and the baffle 4, causing the flue gas to generate multi-scale vortices as it passes through, extending the residence time and enhancing the capture effect of sticky particles. On the other hand, the hollow structure and the inlet and outlet water pipes facilitate the introduction of heated circulating water. Through the water circulation inside the main body 401, the surface of the baffle 4 is kept at a high temperature, preventing sticky particles from adhering and accumulating due to cooling and solidification, effectively solving the clogging problem. In addition, this design can work in conjunction with the water supply and heating pipeline to realize the recycling of water resources, reduce energy consumption and operating costs, and ensure the long-term stable and efficient operation of the dust removal equipment.

[0035] like Figure 5 As shown, the heating sleeve 14 includes a cylindrical shell 1401; a plurality of electric heating tubes 1402 are uniformly arranged in the cylindrical shell 1401 along the circumferential direction.

[0036] The heating sleeve 14 adopts a cylindrical shell 1401 and a circumferentially distributed electric heating tube 1402 structure design, which can achieve efficient and uniform heating effect: the cylindrical shell 1401 tightly wraps the water supply heating pipeline, providing installation space for the electric heating tube 1402 while forming a closed heating chamber to reduce heat loss; the electric heating tube 1402, which is evenly arranged along the circumference, can heat the circulating water in the pipe from multiple angles.

Claims

1. A water curtain dust collector, comprising a tower body (1), a venturi tube (2) connected to the lower side wall of the tower body (1), a screen (3) provided on the lower inner side of the tower body (1), a plurality of baffles (4) provided below the screen (3), and a water collection tank (5) connected to the lower end of the tower body (1), characterized in that, Both the screen (3) and the baffle (4) are hollow; the water collection tank (5) is connected to the sedimentation tank (6); the upper outer wall of the sedimentation tank (6) is connected to the screen (3) and the baffle (4) through the water supply heating pipe; the outlet of the screen (3) and the baffle (4) is connected to the water collection tank (5) through the return water pipe.

2. The water curtain dust collector according to claim 1, characterized in that, The screen (3) includes a hollow disc-shaped shell (303); a number of connecting pipes (304) are provided inside the disc-shaped shell (303); and an inlet pipe (301) and an outlet pipe (302) are provided on the side wall of the disc-shaped shell.

3. The water curtain dust collector according to claim 1, characterized in that, The baffle (4) includes a hollow main body (401); the main body (401) is generally wavy; the upper and lower parts of one side of the main body (401) are respectively provided with a water inlet pipe (402) and a water outlet pipe (403).

4. The water curtain dust collector according to claim 1, characterized in that, The diffuser tube (201) of the venturi tube (2) is fitted with a heating tube (7); the inner wall of the diffuser tube (201) is fitted with a boss (202) to match the heating tube (7).

5. The water curtain dust collector according to claim 4, characterized in that, The heating tube (7) is spirally arranged; the inlet end of the heating tube (7) is connected to the water supply heating pipeline, and the outlet end of the heating tube (7) is connected to the water collection tank (5).

6. The water curtain dust collector according to claim 5, characterized in that, The inlet pipe (203) of the venturi tube (2) is connected to the spray pipe (204); the spray pipe (204) is connected to the rotary drive assembly.

7. The water curtain dust collector according to claim 6, characterized in that, The water inlet pipe (203) is connected to the water spray pipe (204) through a rotary joint (205); the water spray pipe (204) is rotatably installed inside the sleeve (206); the sleeve (206) is installed on the inner wall of the venturi tube (2) through a support rod (207).

8. The water curtain dust collector according to claim 7, characterized in that, The rotary drive assembly includes a bevel gear 1 (8) keyed to the outer wall of the spray pipe (204); bevel gear 1 (8) meshes with bevel gear 2 (9); bevel gear 2 (9) is keyed to the drive shaft (10); the drive shaft (10) is rotatably mounted on the outer wall of the venturi tube (2); the drive shaft (10) passes through the venturi tube (2) and is connected to a motor (11).

9. The water curtain dust collector according to claim 1 or 8, characterized in that, The water supply heating pipeline includes a pipe (12); a water supply pump (13) is installed on the pipe (12); a heating sleeve (14) is also installed on the pipe (12); the pipe (12) is connected to the upper outer wall of the sedimentation tank (6), and a filter screen is installed at the connection between the pipe (12) and the sedimentation tank (6); a water supply pipe (15) is connected to the sedimentation tank (6); and a drain pipe (16) is connected to the lower outer wall of the sedimentation tank (6).

10. The water curtain dust collector according to claim 9, characterized in that, The heating sleeve (14) includes a cylindrical shell (1401); a number of electric heating tubes (1402) are uniformly arranged in the circumferential direction inside the cylindrical shell (1401).

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