Water curtain cyclone dust collector

Abstract

The utility model belongs to flue gas treatment equipment technical field, specifically disclose a kind of water curtain cyclone dust collector, including cylinder, water tank is fixedly connected with the bottom of cylinder, inside is sequentially arranged as clean gas chamber, dust chamber from top to bottom, labyrinth baffle is provided in clean gas chamber, detachably connected with filter cartridge in top portion, annular spray pipe is fixedly connected with in top portion in dust chamber, tangential smoke inlet is opened in side wall, water outlet is uniformly opened in annular spray pipe, discharge port is opened in water tank bottom, water outlet is opened in one side upper portion, water outlet is connected with annular spray pipe by circulating water pipe, and water outlet input end is fixedly connected with filter screen cover, the utility model can better filter the impurity in flue gas by setting dust chamber and annular spray pipe, by setting clean gas chamber and filter barrel, it can avoid that moisture in flue gas enters subsequent pipeline and causes corrosion.

Description

Technical Field

[0001] This utility model belongs to the technical field of flue gas treatment equipment, specifically a water curtain cyclone dust removal device. Background Technology

[0002] Currently, coal-fired boilers often use simple dust removal devices to treat flue gas, such as traditional water film dust collectors or spray towers. These devices generally have shortcomings: First, their dust removal efficiency is limited, especially in capturing fine dust, as they often rely on a single water film or simple spraying, failing to adequately mix and contact the flue gas with water droplets. Second, maintaining the dust removal effect requires continuous and large-scale water replenishment, resulting in high water consumption and the generated wastewater easily causing secondary pollution. Third, the phenomenon of "water carryover" is common during operation, where the purified gas carries water droplets, which can easily corrode downstream pipes and fans. Therefore, it is necessary to design a water curtain cyclone dust collector that can recycle water and effectively block water vapor carried in the purified gas. Utility Model Content

[0003] To address the above technical problems, this utility model provides a water curtain cyclone dust collector that can recycle water and effectively block water vapor carried in the purified gas, thus solving the problems of water waste and large amounts of moisture carried in the purified gas in existing flue gas treatment devices.

[0004] To solve the above technical problems, the technical solution of this utility model is as follows: a water curtain cyclone dust removal device, including a cylindrical body, the upper part of which is cylindrical and the lower part is conical. A water tank is fixedly connected to the bottom of the cylindrical body. The interior is arranged from top to bottom as a clean air chamber and a dust removal chamber. A partition plate is fixedly connected inside the cylindrical body. A circular through hole is opened in the middle of the partition plate. The partition plate divides the cylindrical body into the clean air chamber and the dust removal chamber. A labyrinth-type baffle is provided in the clean air chamber. A filter cylinder is detachably connected to the top. An annular spray pipe is fixedly connected to the top of the dust removal chamber. A tangential smoke inlet is opened on the side wall. Water outlet holes are evenly opened on the lower side of the annular spray pipe. A discharge port is opened at the bottom of the water tank. A water outlet is opened on the upper side of one side. The water outlet is connected to the annular spray pipe through a circulating water pipe. A filter screen is fixedly connected to the input end of the water outlet. A water pump is installed on the circulating water pipe. A water inlet is opened at the top of the water tank.

[0005] Furthermore, the tangential smoke inlet is located below the annular spray pipe, and the annular spray pipe is located below the partition plate.

[0006] Furthermore, the water outlet is inclined at 10°-15° toward the central axis of the annular pipe.

[0007] Furthermore, the labyrinth-type baffle is an inclined arc-shaped plate, and the inclined upward end of the labyrinth-type baffle is fixedly connected to the inner wall of the clean air chamber. At least three labyrinth-type baffles are provided from top to bottom, and the inclination directions of two adjacent labyrinth-type baffles are opposite, and several pits with increased bottom area are provided on their bottom surface.

[0008] Furthermore, the filter cartridge includes a first filter cartridge, a second filter cartridge is clamped inside the first filter cartridge, and a third filter cartridge is clamped inside the second filter cartridge. The pore size of the filter cartridge decreases sequentially from the outside to the inside, and absorbent cotton is installed inside the third filter cartridge.

[0009] Furthermore, the filter screen consists of two filter layers, inner and outer, which can filter out large particulate impurities and sludge in the water.

[0010] This utility model has the following advantages compared with the prior art:

[0011] 1. This utility model improves dust removal efficiency by combining cyclone dust removal with water curtain dust removal. It can also wash away impurities and dust adhering to the inner wall of the cylinder, reducing dust emissions. By setting a circulating water pipe at the bottom of the water tank and connecting it to the annular spray pipe, water resources can be recycled, reducing waste. By setting a labyrinth-type baffle and filter barrel, it can prevent the purified flue gas from carrying a large amount of moisture, which would cause subsequent pipeline corrosion, and at the same time improve purification efficiency.

[0012] 2. This utility model, by setting the water outlet at the bottom of the annular spray pipe to be inclined at 10-15 degrees inward into the annular pipe, can make the sprayed water curtain the same as the cross-sectional area of ​​the cylinder. By covering the water outlet of the water tank with a filter screen, it can prevent impurities and sludge in the water tank from entering the water pump and damaging the water pump. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the annular spray pipe of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the filter cartridge of this utility model.

[0016] Figure 4 This is an enlarged view of the water tank part of this utility model.

[0017] In the diagram: 1. Cylinder body, 2. Clean air chamber, 3. Dust removal chamber, 4. Water tank, 5. Filter cartridge, 51. First layer filter cartridge, 52. Second layer filter cartridge, 53. Third layer filter cartridge, 6. Labyrinth baffle, 7. Divider plate, 8. Circular through hole, 9. Annular spray pipe, 10. Water outlet, 11. Tangential flue gas inlet, 12. Circulating water pipe, 13. Water pump, 14. Filter screen cover, 15. Water inlet, 16. Discharge port, 17. Water outlet. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figures 1 to 4The water curtain cyclone dust collector shown includes a cylindrical body 1. To achieve cyclone separation of the flue gas blown into the dust collection chamber 3, the upper part of the cylindrical body 1 is cylindrical, and the lower part is a conical hopper. The flue gas is blown in through the tangential inlet 11 and spirals downwards along the inner wall of the cylindrical body 1, then rises upwards from the center at the lower conical hopper, achieving cyclone dust removal. Impurities in the flue gas fall along the inner wall into the lower water tank 4. To settle the impurities and dust in the flue gas, the water tank 4 is fixedly connected to the bottom of the cylindrical body 1, and the top of the water tank 4 is connected to the bottom of the cylindrical body 1. To achieve multiple impurity removal, the interior of the cylindrical body 1 is arranged from top to bottom as a clean air chamber 2 and a dust collection chamber 3. To allow flue gas to enter the clean air chamber 2 from the middle, a partition plate 7 is fixedly connected inside the cylinder 1. The partition plate 7 has a circular through-hole 8 in the middle, dividing the cylinder 1 into the clean air chamber 2 and the dust removal chamber 3. To block moisture in the flue gas, a labyrinth-style baffle 6 is installed inside the clean air chamber 2. After the flue gas passes through the cyclone and water curtain dust removal in the dust removal chamber 3, it enters the clean air chamber 2 and comes into contact with the labyrinth-style baffle 6. Moisture in the flue gas adheres to the ground of the labyrinth-style baffle 6. Excessive accumulation results in water droplets falling into the water tank 4 below. This secondary purification of the flue gas prevents air pollution and avoids carrying moisture into subsequent pipelines, which could cause pipeline corrosion. To improve dust removal efficiency, a filter cartridge 5 is detachably connected to the top of the clean air chamber 2 via bolts. An annular spray pipe 9 is fixedly connected to the top of the dust removal chamber 3. Water outlet holes 10 are evenly distributed at the bottom of the annular spray pipe 9, forming a water curtain with the same cross-section at the top of the dust removal chamber 3. Dust removal occurs when flue gas passes through the water curtain. To ensure the blown-in flue gas forms a spiral trajectory, a tangential flue gas inlet 11 is provided on the side wall of the cylinder 1. To facilitate the cleaning of sedimented impurities and sludge in the water tank 4, a discharge port 16 is provided at the bottom of the water tank 4, and a valve is installed on the discharge port 16. This allows for the utilization of water resources... To ensure recycling and avoid waste, an outlet 17 is provided on the upper right side of the water tank. The outlet 17 is connected to the annular spray pipe 9 through the circulating water pipe 12. In order to prevent impurities and sludge in the water tank from entering the water pump and causing blockage and damage during the pumping process, a filter screen cover 14 is fixedly connected to the inlet end of the outlet 17. The filter screen cover 14 covers the outlet 17. In order to provide power for water circulation, a water pump 13 is installed on the circulating water pipe 12. The other side of the water pump 13 is fixedly connected to the side wall of the water tank 4, and the water pump 13 is electrically connected to an external power source. In order to facilitate adding water and cleaning the water tank 4, a water inlet 15 is provided on the top of the water tank 4.

[0020] In order to allow the flue gas to undergo cyclone dust removal first and then contact the water curtain for secondary dust removal, the tangential flue gas inlet 11 is located below the annular spray pipe 9, and the annular spray pipe 9 is located below the partition plate 7. The water curtain can also wash the dust adhering to the inner wall of the cylinder 1 into the bottom water tank 4. In order to facilitate the cleaning of the sediment in the water tank 4, the bottom of the water tank 4 is set as an inclined surface, with the inclined downward end close to the discharge port 16.

[0021] In order to make the water curtain shape the same as the cross-section of the cylinder 1, the water outlet 10 is set to be inclined at 10°-15° towards the central axis of the annular pipe to ensure that a tight water curtain can be formed inside the cylinder 1, and the flue gas can be subjected to secondary dust removal when passing through the water curtain.

[0022] To prevent moisture in the flue gas from entering subsequent pipes and causing corrosion, the labyrinthine baffle 6 is an inclined arc-shaped plate. The upward-inclined end of the labyrinthine baffle 6 is fixedly connected to the inner wall of the clean air chamber 2. At least three labyrinthine baffles 6 are provided from top to bottom, with adjacent labyrinthine baffles 6 inclined in opposite directions. Several pits with increased bottom surface area are provided on their bottom surfaces. When the flue gas comes into contact with the pits on its bottom surface, it can block some moisture. After accumulation, water droplets fall down. The labyrinthine baffles are inclined so that the water droplets above can flow into the bottom water tank 4 after falling down.

[0023] In order to perform multiple filtrations and avoid the presence of impurity particles in the flue gas, the filter cartridge 5 includes a first filter cartridge 51, a second filter cartridge 52 is inserted inside the first filter cartridge 51, and a third filter cartridge 53 is inserted inside the second filter cartridge 52. The pore size of the filter cartridge 5 decreases from the outside to the inside. In order to improve the water absorption efficiency of the flue gas, water-absorbing cotton is installed inside the third filter cartridge 53.

[0024] It should be noted that different lengths of smoke outlet pipes can be connected at the outlet of the top of the three-layer filter cartridge 53, depending on the actual situation.

[0025] In order to prevent impurities in water tank 4 from entering water pump 13 and causing damage, filter screen 14 consists of inner and outer filter layers, which can filter out large particles of impurities and sludge in the water.

[0026] The specific working process of this utility model is as follows:

[0027] When the boiler burns coal, firstly, a full tank of water needs to be added to the water tank 4 through the water inlet 15, and the valve on the discharge port 16 must be closed. Then, the exhaust outlet is connected to the tangential flue gas inlet 11, so that the flue gas is blown into the dust removal chamber 3 tangentially. It moves spirally downward along the inner wall of the dust removal chamber 3. Under the action of centrifugal force, particulate impurities in the flue gas adhere to the inner wall of the dust removal chamber 3, or fall along the inner wall into the water tank 4 below for sedimentation. When the flue gas spirals downward to the interface between the water tank 4 and the bottom of the dust removal chamber 3, the flue gas is blocked by the water surface and begins to move vertically upward from the middle of the dust removal chamber 3. At this time, the water pump 12 is turned on, and the water in the water tank 4 is filtered by the filter screen 14 and pumped into the upper annular spray pipe 9. After being pressurized and sprayed out through the bottom water outlet 10, it forms a cross-section with the dust removal chamber 3. The flue gas moving upwards must pass through the thin water curtain, and some particles and dust are carried out by the water vapor in the water curtain and fall into the lower waterproof box 4. The flue gas passing through the water curtain enters the clean air chamber 2 through the circular through hole 8 at the top. After contacting the lower surface of the labyrinth-type baffle 6 in sequence, the flue gas reaches the top of the clean air chamber 2. At this time, most of the water vapor carried in the flue gas adheres to the bottom plate of the labyrinth-type baffle 6 after contacting it, and finally drips and flows into the lower waterproof box 4. The flue gas finally flows out from the filter cartridge 5 at the top of the clean air chamber 2. It needs to pass through the first filter cartridge 51, the second filter cartridge 52 and the third filter cartridge 53 with water absorption function in sequence before being discharged. The exhaust gas treatment according to the above steps can reduce air pollution and avoid the problem of water entering and corroding the pipe due to the excessive length of the flue gas outlet pipe.

Claims

1. A water curtain cyclone dust removal device, comprising a cylindrical body (1), wherein the upper part of the cylindrical body (1) is a cylinder and the lower part is a conical bucket, a water tank (4) is fixedly connected to the bottom of the cylindrical body (1), and the interior is arranged from top to bottom as a clean air chamber (2) and a dust removal chamber (3), characterized in that: A partition plate (7) is fixedly connected inside the cylinder (1). A circular through hole (8) is provided in the middle of the partition plate (7). The partition plate (7) divides the cylinder (1) into a clean air chamber (2) and a dust removal chamber (3). A labyrinth baffle (6) is provided inside the clean air chamber (2), and a filter cylinder (5) is detachably connected to the top. An annular spray pipe (9) is fixedly connected to the top of the dust removal chamber (3), and a tangential smoke inlet (11) is provided on the side wall. The spray pipe (9) has water outlet holes (10) evenly distributed on the lower side. The water tank (4) has a discharge port (16) at the bottom and a water outlet (17) at the upper side. The water outlet (17) is connected to the annular spray pipe (9) through a circulating water pipe (12). A filter screen cover (14) is fixedly connected to the input end of the water outlet (17). A water pump (13) is installed on the circulating water pipe (12). A water inlet (15) is opened at the top of the water tank (4).

2. The water curtain cyclone dust collector according to claim 1, wherein: The tangential smoke inlet (11) is located below the annular spray pipe (9), and the annular spray pipe (9) is located below the partition plate (7).

3. The water curtain cyclone dust collector of claim 1, wherein: The water outlet (10) is inclined at 10°-15° toward the central axis of the annular pipe.

4. The water curtain cyclone dust collector of claim 1, wherein: The labyrinth-type baffle (6) is an inclined arc-shaped plate. The inclined upward end of the labyrinth-type baffle (6) is fixedly connected to the inner wall of the clean air chamber (2). There are at least three labyrinth-type baffles (6) from top to bottom. The two adjacent labyrinth-type baffles (6) are inclined in opposite directions, and several pits with increased bottom area are provided on their bottom surfaces.

5. The water curtain cyclone dust collector of claim 1, wherein: The filter cartridge (5) includes a first filter cartridge (51), a second filter cartridge (52) is inserted inside the first filter cartridge (51), and a third filter cartridge (53) is inserted inside the second filter cartridge (52). The pore size of the filter cartridge (5) decreases from the outside to the inside, and absorbent cotton is installed inside the third filter cartridge (53).

6. The water curtain cyclone dust collector of claim 1, wherein: The filter screen (14) consists of two filter layers, inner and outer, which can filter out large particulate impurities and sludge in the water.

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