A wet multi-stage series cyclone dust collector

Abstract

This invention discloses a wet multi-stage cyclone dust collector, comprising a primary volute and a secondary volute connected vertically, with a partition between them. The primary volute's sidewall is connected to an inlet chamber, and its bottom is connected to a dust hopper. A water pipe and a fish-scale atomizing plate are installed in the inlet chamber. A primary separation cylinder is vertically installed inside the primary volute, passing through the partition and connecting to the secondary volute. The dust-laden airflow enters the secondary volute through the primary separation cylinder, achieving the first separation of water vapor and dust particles from the airflow. A secondary separation cylinder is horizontally installed inside the secondary volute, with one end positioned at the tail of the secondary volute and the other end connected to a centrifugal fan. Under centrifugal force, water vapor and dust particles are separated from the airflow a second time, and the final airflow is discharged from the centrifugal fan in compliance with emission standards. This invention realizes the application of wet methods in cyclone dust collectors, improving the dust removal efficiency of cyclone dust collectors, enhancing the ability to treat dust particles with a diameter below 10μm, while solving the problem of large size in multi-stage cyclone dust collectors, increasing equipment adaptability, and extending service life.

Description

Technical Field

[0001] This invention relates to the field of high-efficiency dust removal technology, specifically to a wet multi-stage series cyclone dust collector. Background Technology

[0002] Mine dust is one of the five major causes of coal mine accidents. During coal mine production, dust explosions pose a serious safety hazard, potentially leading to significant casualties and property damage. Many coal mines have experienced dust explosions in the past, which can also cause miners to contract various occupational diseases, severely impacting the health of workers.

[0003] With the development of coal mining technology, the amount of dust generated in coal mines has been increasing year by year, with the coal mining face being the area with the highest dust content. Currently, cyclone dust collectors on the market are highly efficient at controlling dust particles larger than 10μm, but less efficient at controlling dust particles smaller than 10μm, leading to the possibility of emissions exceeding standards and failing to meet increasingly stringent environmental emission standards. Furthermore, multi-stage cyclone dust collectors are parallel dust collectors, resulting in a large equipment size and limiting their usability.

[0004] Currently, there is an urgent need to address the issue of low dust removal efficiency in cyclone dust collectors. The ability to treat dust particles smaller than 10μm should be improved, while the large size of multi-stage cyclone dust collectors should also be addressed to increase the adaptability of the equipment and enable its application in more industries. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a wet multi-stage series cyclone dust collector, enabling the application of wet methods in cyclone dust collectors. By employing a multi-stage series structure, it enhances the ability to treat dust particles smaller than 10μm, improving dust removal efficiency while reducing equipment size, increasing equipment adaptability, extending equipment lifespan, and broadening the applicable scope of the dust collector.

[0006] To achieve the above objectives, the present invention provides a wet multi-stage series cyclone dust collector, comprising a primary volute, a secondary volute, a dust hopper, an air inlet chamber, and a centrifugal fan. The primary and secondary volutes are connected vertically and a partition is provided between them. The side wall of the primary volute is connected to the air inlet chamber, and the bottom is connected to the dust hopper.

[0007] The air inlet chamber is equipped with water pipes and fish-scale mist-breaking plates. Water is sprayed out through the water pipe nozzles, and under the action of the fish-scale mist-breaking plates, it is finely broken up and combined with the dust-laden gas. Then, it enters the first-stage volute under the traction of the centrifugal fan.

[0008] A primary separation cylinder is vertically installed inside the primary volute. The primary separation cylinder passes through the partition and its upper bend connects to the secondary volute. The dust-laden airflow rotates from top to bottom along the outer wall of the primary separation cylinder. After reaching the bottom of the ash hopper, it rotates upward along the axis and enters the primary separation cylinder. It then enters the secondary volute through the primary separation cylinder. In this process, the water vapor and dust particles in the fluid are separated from the airflow for the first time.

[0009] A secondary separation cylinder is installed horizontally inside the secondary volute. One end of the secondary separation cylinder is located at the tail of the secondary volute, and the other end is connected to the centrifugal fan. The fluid inside the secondary volute is redirected and rotated along the inner wall of the secondary volute by the upper bend of the primary separation cylinder. When it reaches the tail of the casing, water vapor and dust particles are separated from the airflow for the second time under the action of centrifugal force. Then the airflow enters the secondary separation cylinder and is discharged from the centrifugal fan in compliance with standards.

[0010] Furthermore, it also includes a support frame, on which the primary volute, secondary volute, centrifugal fan, and air inlet chamber are all fixed.

[0011] Furthermore, it also includes a square-to-circular connection, wherein the primary volute and the secondary volute are connected by a square-to-circular connection.

[0012] Furthermore, a nozzle is installed on the water pipe, and the nozzle is a spiral nozzle used to diffuse the water flow in the water pipe.

[0013] Furthermore, the primary volute has a vortex-like structure.

[0014] Furthermore, the primary separation cylinder adopts a flared structure with a larger upper part and a smaller lower part to enhance the swirling air velocity inside the primary volute, increase centrifugal force, enhance the downward swirling effect, and reduce the upward air velocity inside the primary separation cylinder.

[0015] The lower part of the outer wall of the primary separator is provided with a water-stop ring to prevent water droplets on the outer wall of the primary separator from being sucked into the primary separator when they slide down to the air inlet; the number of water-stop rings is 2-5.

[0016] Furthermore, the partition is an inclined partition, and a pressurized sewage pipe is connected to the bottom of the inclined partition. The bottom of the pressurized sewage pipe leads to the ash hopper. The wet dust collected on the wall of the device slides down onto the inclined partition under the action of gravity, and then collects into the pressurized sewage pipe and is transported to the ash hopper for centralized treatment.

[0017] Furthermore, the fish-scale mist-breaking plate is composed of multiple rows of angle iron arranged at intervals, with each row of fish-scale mist-breaking plates staggered to break up the water flow and combine the water flow with the dust-laden gas.

[0018] Furthermore, the fish-scale mist-breaking plate consists of two rows of spaced-apart angle irons, with adjustable spacing between the angle irons to accommodate different airflow requirements.

[0019] Furthermore, the tail end of the secondary volute is provided with an observation and maintenance port.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. This invention uses wet dust removal and innovatively adds a water source to the wet cyclone dust collector, which allows dust and water to combine in advance, increases the specific gravity of the dust-laden gas, allows for higher inlet air velocity, and reduces the size of the dust collector while increasing dust removal efficiency.

[0022] 2. This invention employs a two-stage dust suppression system. The dust-laden gas sequentially passes through a fish-scale mist-breaking plate, a first-stage volute, a first-stage separation cylinder, a second-stage volute, and a second-stage separation cylinder, undergoing first and second separation processes respectively. This continuously enhances the treatment efficiency, and the gas is finally discharged from the centrifugal fan in compliance with standards, thus improving the ability to treat dust particles with a diameter of less than 10μm.

[0023] 3. The air inlet of this invention is equipped with a mist-breaking mechanism. On the one hand, the fish-scale mist-breaking plate increases the mist-breaking efficiency and water-dust binding efficiency, balances the dust collector resistance, reduces the pressure in the first-stage volute, and enables normal sewage discharge from the ash hopper. At the same time, it increases the service life of the equipment, reduces the cost of later maintenance, and overcomes the problem of broken vibrating wire plates in the prior art. On the other hand, the water flow is sprayed out through a rotating nozzle, which increases the water flow diffusion area and improves the water-dust binding area. In addition, the rotating nozzle has a large diameter, eliminating the risk of nozzle clogging and increasing the stability of the equipment.

[0024] 4. The present invention adopts a series arrangement of cyclone dust collectors, which results in a small dust collector size, increases the adaptability of the device, and effectively expands the scope of application and industries of the dust collector;

[0025] 5. The first-stage separation cylinder of the present invention adopts a funnel-mouth separation cylinder, which not only enhances the swirling wind speed inside the first-stage volute to improve dust collection efficiency, but also reduces the rising wind speed inside the separation cylinder, thereby improving the settling and separation efficiency of water, air and dust, and also enhances the downward swirling effect.

[0026] 6. The present invention adds three water-stop rings to the outer side of the primary separation cylinder wall, which can effectively prevent sewage from sliding along the outer wall to the air inlet of the separation cylinder and being sucked into the cylinder, thereby improving the separation efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1This is a front view of a wet multi-stage cyclone dust collector provided in Embodiment 1;

[0029] Figure 2 This is a side view of a wet multi-stage cyclone dust collector provided in Embodiment 1;

[0030] Figure 3 This is a top view of a wet multi-stage cyclone dust collector provided in Embodiment 1;

[0031] Figure 4 This is a schematic diagram of the airflow direction of a wet multi-stage series cyclone dust collector provided in Example 1;

[0032] Figure 5 This is a schematic diagram of the installation structure of the fish scale mist-breaking plate provided in Example 1;

[0033] Figure 6 This is a top view of the fish-scale mist-breaking plate provided in Example 1;

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Air inlet chamber; 2. Fish scale mist plate; 3. Ash hopper; 4. Primary volute; 5. Booster drain pipe; 6. Water stop ring; 7. Primary separator; 8. Inclined baffle; 9. Square-to-round joint; 10. Secondary volute; 11. Inspection and maintenance port; 12. Secondary separator; 13. Centrifugal fan; 14. Water pipe; 15. Spiral nozzle; 16. Support frame. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figures 1-4 As shown, a wet multi-stage cyclone dust collector includes a primary volute 4, a secondary volute 10, a square-to-circular junction 9, a dust hopper 3, an air inlet chamber 1, and a support 16. The primary volute 4 and the secondary volute 10 are mounted vertically on the support 16. The primary volute 4 adopts a vortex structure. The primary volute 4 and the secondary volute 10 are connected by the square-to-circular junction 9. One side of the primary volute 4 is connected to the air inlet chamber 1, and the dust hopper 3 is installed at the bottom of the primary volute 4.

[0039] The air inlet chamber 1 is equipped with a water pipe 14 and a fish-scale mist-breaking plate 2. A spiral nozzle 15 is mounted on the water pipe 14. The spiral nozzle 15 is used to maximize the diffusion of the water flow in the water pipe 14, initially forming a water mist. Figures 5-6 As shown, the fish-scale mist-breaking plate 2 consists of multiple rows of angle irons arranged at intervals. Optimally, it consists of two rows of angle irons arranged at intervals. Its function is to further break up the water mist and combine the water mist with the dust-laden gas. Currently, the market uses vibrating wire plates to break up the water flow, but vibrating wire plates cause significant wind resistance and are prone to clogging. Therefore, this invention uses the fish-scale mist-breaking plate 2 to avoid the above problems. Its purpose is to break up the mist and combine the water with the dust.

[0040] A primary separator 7 is vertically installed inside the primary volute 4. The upper bend of the primary separator 7 connects to the secondary volute 10. An inclined baffle 8 is installed at the top of the primary volute 4 to isolate the primary volute 4 and the secondary volute 10 into two independent spaces. Dust-laden gas in the primary volute 4 enters the secondary volute 10 only through the primary separator 7. The primary separator 7 adopts a flared shape, wider at the top and narrower at the bottom. Two to five water-stop rings 6 are added to the lower part of the outer wall of the primary separator 7. Optimally, the number of water-stop rings 6 is three. As the equipment model increases, the number of water-stop rings 6 should not exceed five. Too many water-stop rings 6 will cause dust-laden gas to directly face the water-stop rings near the air inlet, posing a risk of material accumulation and wear. The purpose of setting the water-stop rings 6 is to prevent water droplets on the outer wall of the primary separator 7 from being sucked into the primary separator 7 by the rising airflow when they slide down to the lower opening.

[0041] The bottom of the inclined baffle 8 is connected to a pressurized sewage pipe 5, which leads to the ash hopper 3. Wet dust collected on the vessel wall slides down onto the inclined baffle 8 under gravity, and then collects in the pressurized sewage pipe 5 and is transported to the ash hopper 3 for centralized treatment. The pressurized sewage pipe 5 uses a relatively thin pipe to increase the pipe pressure, allowing water, dust, and sludge to pass through the pipe, but not air, so that it can normally discharge the wastewater treated in the secondary volute 10.

[0042] A secondary separator 12 is horizontally installed inside the secondary volute 10. One end of the secondary separator 12 is located at the tail of the secondary volute 10, and the other end is connected to a centrifugal fan 13. The airflow inside the secondary volute 10 rotates to the tail of the casing, enters the secondary separator 12, and is discharged from the centrifugal fan 13 in compliance with standards. An observation and maintenance port 11 is installed at the tail of the secondary volute 10.

[0043] The working principle of this invention:

[0044] This invention discloses a wet multi-stage cyclone dust collector with a two-stage series structure. Dust-laden gas is drawn into the dust collector through the inlet chamber 1 by a centrifugal fan 13. The inlet chamber 1 is equipped with spiral nozzles 15, which maximize the diffusion of water flow into a water mist. The water mist is then finely broken up by the fish-scale mist-breaking plate 2 and initially combines with the dust-laden gas. The dust-laden gas and fine water mist enter the first-stage volute 4, which employs a vortex structure. Centrifugal force separates dust particles from the airflow and collects them on the chamber wall. During this process, centrifugal force continuously enhances the binding efficiency of the fine water mist and dust particles. The increased density of the water-mixed dust particles allows them to fall more easily into the ash hopper 3 under gravity.

[0045] When the dust-laden gas is inside the primary volute 4, the gas rotates in a spiral motion from top to bottom along the outer wall. After reaching the bottom of the cone in the ash hopper 3, this downward rotating airflow turns upward and rotates upward along the axis, entering the interior of the primary separation cylinder 7. The primary separation cylinder 7 adopts a funnel-shaped design with a larger upper diameter and a smaller lower diameter. By enlarging the upper diameter, on the one hand, the flow area of ​​the dust-laden gas in the volute can be reduced, the swirling wind speed can be increased, the centrifugal force can be enhanced, and the dust removal efficiency can be increased; on the other hand, the upward wind speed inside the primary separation cylinder 7 can be reduced, allowing dust, water, and gas to settle and separate here.

[0046] Dust-laden gas enters the secondary volute 10 through the primary separator 7. The airflow changes direction and rotates along the inner wall of the secondary volute 10 with the upper bend of the primary separator 7. With the help of centrifugal force, dust particles containing water vapor are separated from the airflow and captured on the wall. The wet dust captured on the wall slides down onto the inclined baffle 8 under the action of gravity, and then collects into the pressurized sewage pipe 5 and is transported to the ash hopper 3 for centralized treatment.

[0047] The airflow inside the secondary volute 10 rotates to the tail of the casing, and then instantly changes direction to enter the secondary separator 12. The airflow instantly changes direction to separate the dust and water vapor contained in the airflow, and then enters the centrifugal fan 13 to meet the emission standards.

[0048] Example 2

[0049] The technical solution is basically the same as that in Embodiment 1, except that the arrangement interval of the angle irons of the fish scale mist plate 2 is adjustable. The angle irons are detachable and installed by bolts. The number of angle irons installed can be adjusted according to the different air volume requirements of the dust collector to adjust the interval.

[0050] Comparative Example 1

[0051] A cyclone dust collector is basically the same as the technical solution of Embodiment 1, except that only a water pipe 14 is installed in the air inlet chamber 1, and no fish scale mist-breaking plate 2 is set; when the spiral nozzle 15 on the water pipe 14 is opened, water mist is sprayed out, but without the fish scale mist-breaking plate 2, the water flow cannot be further abraded.

[0052] Comparative Example 2

[0053] A cyclone dust collector is basically the same as the technical solution of Embodiment 1, except that the air inlet chamber 1 is not only equipped with water pipe 14, but also without fish scale mist decomposition plate 2, so there is no water mist to combine with the dust-laden gas, which is a dry dust removal method.

[0054] The air volume and efficiency of the dust collectors disclosed in Example 1 and Comparative Examples 1 and 2 were tested. The test methods, test data, and test results are as follows:

[0055] I. Airflow test of wet multi-stage series cyclone dust collector:

[0056] 1.1 Test Objective: To test the air volume and equipment resistance of the dust collector under normal operating conditions;

[0057] 1.2 Test method: Drill holes in the dust collector's outlet, inlet, and primary volute using a hand drill. Under operating conditions, use an anemometer and anemometer to measure the air volume and resistance at the inlet and outlet of the equipment.

[0058] 1.3 Testing instruments: anemometer, wind speed and pressure meter, 10mm hand drill;

[0059] 1.4 Test Data:

[0060] Table 1. Airflow test results of the wet multi-stage cyclone dust collector in Example 1

[0061]

[0062] Table 2. Airflow test results of the cyclone dust collector in Comparative Example 1

[0063]

[0064] II. Dust removal efficiency test of wet multi-stage series cyclone dust collector:

[0065] 2.1 Test Objective: To test the dust collector efficiency of the equipment under different inlet dust concentrations. Comparative tests were conducted during this process. Example 2 tested the dust collection efficiency in a dry state without water mist or fish-scale mist-breaking plates. Example 1 tested the dust collection efficiency with water mist and without fish-scale mist-breaking plates. Example 1 tested the dust collection efficiency with water mist and fish-scale mist-breaking plates installed.

[0066] 2.2 Test Method: Each test group was conducted during dust collector operation at a concentration of 1 g / m³. 3 2g / m 3 3g / m 3 5g / m 3 The standard procedure involves adding pulverized coal in stages, with each addition lasting one minute, to test the ash concentration at the dust collector outlet. When changing the test target, thoroughly rinse the equipment to ensure its internal cleanliness.

[0067] 2.3 Testing Instruments: 200-mesh coal powder, electronic scale, basin, dust detector; (Note: This dust concentration meter is a laser dust concentration meter, with glass at the front and back for light transmission, so the dust concentration can only increase during testing, and the value cannot decrease. The highest concentration that can be tested is 100 mg / m³.) 3 );

[0068] 2.4 Test Data:

[0069] Table 3. Dust removal efficiency test results of the wet multi-stage cyclone dust collector in Example 1.

[0070]

[0071]

[0072] Table 4. Dust removal efficiency test results of the cyclone dust collector in Comparative Example 1

[0073]

[0074]

[0075] Table 5. Dust removal efficiency test results of the cyclone dust collector in Comparative Example 2

[0076]

[0077] *When the delivery standards were 3g and 5g, the levels were severely exceeded and no four tests were conducted, so the test results are unsubstantiated.

[0078] Summarize:

[0079] 1. As shown in Tables 1 and 3, the dust removal method in Example 1, based on design theory, no-load test, and powder feeding test, conforms to the product design expectations and meets the dust removal efficiency requirements. After treatment by the cyclone dust collector in Example 1, the dust emission concentration meets the national "Atmospheric Emission Standard" of 30 mg / m³. 3 And the "Emission Standard for Coal Industry" 80mg / m³ 3 According to the regulations.

[0080] 2. According to the provisions of GBZ 2.1-2007 regarding the permissible concentration of dust in industrial workplaces, the final respirable dust concentration of coal dust (SiO2 < 10%) in indoor workplaces shall not exceed 2.5 mg / m³. 3 The total dust concentration is no more than 4 mg / m³ 3 After completing the dust collection and treatment at the dust-generating points according to this standard, the dust concentration requirement can be guaranteed, which meets occupational health standards.

[0081] 3. Comparison of the air volume and efficiency test results of the dust collectors in Example 1 and Comparative Examples 1 and 2. Table 1 and Table 2 show that Example 1 uses a fish-scale mist-breaking plate to break up the mist and combine water and dust, which balances the resistance of the dust collector, reduces the pressure in the first-stage volute, and enables normal discharge of sewage from the ash hopper. In contrast, Comparative Example 1 has too little resistance at the air inlet and too much air volume, so it cannot achieve the function of this application.

[0082] 4. Through comparative analysis of Tables 3, 4, and 5, it can be clearly concluded that: ① Multi-stage cyclone dust collectors have higher efficiency in treating low-concentration dust, and higher efficiency in treating high-concentration dust exceeding 3g / m³. 3 ① The dust concentration at a certain concentration (e.g., 1 / min) is poorly controlled; ② The application of wet methods in cyclone dust collectors can effectively solve the problem of low dust control efficiency under high dust concentration conditions, thus effectively improving dust control efficiency; ③ When fish-scale mist-breaking plates are added, the dust removal efficiency is further improved, and can even be reduced to 10 mg / m³. 3 The following will fundamentally change the dust collector.

[0083] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wet multi-stage cyclone dust collector, characterized in that, It includes a primary volute (4), a secondary volute (10), an ash hopper (3), an air inlet chamber (1), and a centrifugal fan (13). The primary volute (4) and the secondary volute (10) are connected vertically and vertically, and a partition is provided between them. The side wall of the primary volute (4) is connected to the air inlet chamber (1), and the bottom is connected to the ash hopper (3). The air inlet (1) is sequentially equipped with an air inlet, a water pipe (14) and a fish scale mist-breaking plate (2). Dust-laden gas is introduced into the air inlet. After the water is sprayed out from the water pipe (14), it is finely broken down by the fish scale mist-breaking plate (2) and combines with the dust-laden gas. Then, it enters the first-stage volute (4) under the traction of the centrifugal fan (13). The first-stage volute (4) is vertically installed with a first-stage separation cylinder (7). The first-stage separation cylinder (7) passes through the partition and its upper bend connects to the second-stage volute (10). The dust-laden airflow rotates from top to bottom along the outer wall of the first-stage separation cylinder (7). After reaching the bottom of the ash hopper (3), it rotates upward along the axis into the first-stage separation cylinder (7). It then enters the second-stage volute (10) through the first-stage separation cylinder (7), thus achieving the first separation of water vapor and dust particles from the airflow. A secondary separation cylinder (12) is horizontally installed inside the secondary volute (10). One end of the secondary separation cylinder (12) is located at the tail of the secondary volute (10), and the other end is connected to the centrifugal fan (13). The dust-laden airflow inside the secondary volute (10) is redirected by the upper bend of the primary separation cylinder (7) and rotates along the inner wall of the secondary volute (10), reaching the tail of the secondary volute (10) shell, thus achieving a second separation of water vapor and dust particles from the airflow. Then, the airflow enters the secondary separation cylinder (12) and is discharged from the centrifugal fan (13) in compliance with standards. The fish scale mist-breaking plate (2) is a multi-row, spaced-apart angle iron, with the front and rear fish scale mist-breaking plates arranged alternately, used to finely break up the water flow and combine the water flow with the dust-laden gas.

2. A wet multi-stage cyclone dust collector according to claim 1, characterized in that, The partition is an inclined partition (8), and the bottom of the inclined partition (8) is connected to a pressurized sewage pipe (5). The bottom of the pressurized sewage pipe (5) leads to the ash hopper (3). The wet dust collected on the wall of the device slides down onto the inclined partition (8) under the action of gravity, and then gathers into the pressurized sewage pipe (5) and is transported to the ash hopper (3) for centralized treatment.

3. A wet multi-stage cyclone dust collector according to claim 1, characterized in that, The first-stage volute (4) has a vortex-shaped structure; the first-stage separation cylinder (7) adopts a flared structure with a large upper part and a small lower part, which is used to enhance the swirling wind speed inside the first-stage volute (4), increase the centrifugal force, and at the same time enhance the downward swirling effect and reduce the upward wind speed inside the first-stage separation cylinder (7).

4. A wet multi-stage cyclone dust collector according to claim 1, characterized in that, It also includes a square-connected circle (9), through which the primary volute (4) and the secondary volute (10) are connected.

5. A wet multi-stage cyclone dust collector according to claim 1, characterized in that, A nozzle is installed on the water pipe (14), the nozzle being a spiral nozzle (15) for diffusing the water flow in the water pipe (14).

6. A wet multi-stage cascade cyclone dust collector according to claim 1, characterized in that, It also includes a bracket (16), wherein the primary volute (4), the secondary volute (10), the centrifugal fan (13) and the air inlet chamber (1) are all fixed to the bracket (16).

7. A wet multi-stage cascade cyclone dust collector according to claim 1, characterized in that, The lower part of the outer wall of the primary separation cylinder (7) is provided with a water-stop ring (6) to prevent water droplets on the outer wall of the primary separation cylinder (7) from being sucked into the primary separation cylinder (7) when they slide down to the air inlet; the number of the water-stop rings (6) is 2-5.

8. A wet multi-stage cyclone dust collector according to claim 1, characterized in that, The fish-scale mist-breaking plate consists of two rows of spaced-apart angle irons, with adjustable spacing between the angle irons to accommodate different airflow requirements.

9. A wet multi-stage cyclone dust collector according to claim 1, characterized in that, The tail of the secondary volute (10) is provided with an observation and maintenance port (11).

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