Wet type cyclone dust collector

Abstract

The utility model discloses a wet-type cyclone dust collector which comprises a tower body and a circulating water tank, the tower body is of a cylindrical structure, a base with a conical hopper is fixedly installed at the bottom of the tower body, supporting legs are installed on the lower portion of the base, an air inlet pipe connected in the tangential direction is arranged on the side face of the bottom of the tower body, and a plurality of evenly-distributed rotating plate assemblies are installed in the tower body in the height direction. The rotating plate assembly comprises a flange ring, a plurality of evenly-distributed blades are welded to the inner side of the flange ring along the circumference, airflow axially penetrates through the rotating plate assembly to form rotational flow, an annular water tank is formed between the outer side of the flange ring and the tower body, a plurality of penetrating through holes are formed in the bottom of the water tank along the circumference, and the lower end of the base is communicated with the circulating water tank through a pipeline. A plurality of layers of spraying pipes are transversely arranged in the tower body, a water pump is arranged in the circulating water tank, the output end of the water pump is connected with a water supply pipe, and the spraying pipes are respectively communicated with the water supply pipe. Particle impurities with different sizes in flue gas can be effectively separated, the dust removal effect is good, and the consumed electric energy is less.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a wet cyclone dust collector. Background Art

[0002] Coal-fired furnaces and chemical production processes generate a large amount of dust-containing exhaust gas, which is usually treated by bag filter dust collectors or electrostatic dust collectors. Bag filter dust collectors are usually used to filter out larger particles of dust, but are not very effective for fine dust particles. Although electrostatic dust collectors can remove fine dust particles, they are not very effective for larger particles of dust and consume a lot of electricity. In actual operation, due to the diversity of fuels and production raw materials, the composition of dust particles in the exhaust gas is relatively complex, and it is difficult for one dust collector to take both into account, so the dust removal effect is not good. The wet cyclone dust collector is compatible with both large and small particle dust removal. For example, Chinese utility model with publication number CN209753119U discloses a double spray dust removal device for a wet electrostatic dust collector. Harmful substances are wetted and water falls down to achieve the dust removal effect, thereby improving the dust removal efficiency of the dust collector, having a good dust removal effect and low energy consumption. However, the above scheme also has the following shortcomings: in actual application, spray cyclone dust removal is carried out in the initial stage of air intake, and it is easy for more dust and impurities to adhere to the cyclone plate and quickly gather, resulting in a high frequency of flushing and cleaning, affecting the efficiency of use. Utility Model Content

[0003] The purpose of the utility model is to provide a wet cyclone dust collector to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wet cyclone dust collector, comprising a tower body, a circulating water tank and a spray assembly, the tower body is a cylindrical structure, a base with a cone bucket is fixedly installed at the bottom of the tower body, and a leg is installed at the lower part of the base, and an air inlet pipe connected tangentially to the bottom side of the tower body is provided, and a spiral flow channel is formed by welding two spiral blades to the inner wall of the bottom of the tower body, and the inner end of the air inlet pipe is connected to the upper part of the spiral flow channel, and the spiral flow channel guides the incoming exhaust gas to the liquid surface at the bottom of the inner cavity of the tower body, and the tower body A concentric air guide hood is installed at the bottom of the inner cavity through a spoke rod. The air guide hood is a conical cylindrical shell with a small upper part and a large lower part, and the air guide hood is located in the middle of the spiral flow channel. A plurality of evenly arranged rotating plate assemblies are installed inside the tower body along the height direction. The rotating plate assembly includes a flange ring, and a plurality of evenly distributed fan blades are welded along the circumference on the inner side of the flange ring. The fan blades are arranged at an angle, and the rotating airflow increases its rotation speed after passing through the rotating plate assembly. An annular water trough is formed between the outer side of the flange ring and the tower body, and a plurality of through holes are provided at the bottom of the water trough along the circumference.

[0005] Preferably, a baffle-type demister is installed at the upper end of the tower body, and an exhaust pipe is installed at the upper end of the demister.

[0006] Preferably, the uppermost spray pipe is located above the uppermost rotary plate assembly, and the spray pipe sprays water to cover all the rotary plate assemblies.

[0007] Preferably, the spray assembly includes a circulating water tank, a water pump and a spray pipe. The lower end of the base is connected to the circulating water tank through a pipe. Multiple layers of horizontally arranged spray pipes are installed in the tower body. The water pump is arranged inside the circulating water tank. The output end of the water pump is connected to a water supply pipe, and the spray pipes are respectively connected to the water supply pipes.

[0008] Compared with the prior art, the utility model has the following beneficial effects: after the smoke enters, the spiral flow channel guides the smoke spiral downward, so that the smoke collides with the water surface, and a part of the larger particulate impurities dissolve in the water, and then the smoke cyclone flows upward through each rotary plate assembly in turn to increase the rotation speed, and the dust condenses water droplets in the cyclone hits the inner wall of the tower body under the action of centrifugal force, and flows downward along the inner wall to the cone bucket of the base. The utility model first guides the airflow of the smoke to the liquid surface in a spiral manner, increases the collision contact time with the liquid surface, so that the particulate impurities are first adsorbed by water as much as possible, and then settle through the spray cyclone, which can effectively reduce the accumulation of dust impurities on the rotary plate assembly, which is conducive to reducing the cleaning frequency and improving the use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0010] Figure 2 It is a schematic diagram of the three-dimensional structure of the rotating plate assembly.

[0011] In the figure: 1. tower body; 2. base; 3. demister; 4. legs; 5. exhaust pipe; 6. air inlet pipe; 7. circulating water tank; 8. water supply pipe; 9. rotary plate assembly; 91. flange ring; 92. fan blade plate; 93. through hole; 10. spray pipe; 11. water tank; 12. spiral flow channel; 13. guide cover. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0013] See also Figure 1-2 The utility model provides a technical solution: a wet cyclone dust collector, including a tower body 1 and a circulating water tank 7. The tower body 1 is a cylindrical structure. A base 2 with a cone bucket is fixedly installed at the bottom of the tower body 1. A support leg 4 is installed at the lower part of the base 2. A tangentially connected air intake pipe 6 is provided on the bottom side of the tower body 1. After the flue gas enters the tower body 1 through the air intake pipe 6, it can swirl.

[0014] The inner wall of the bottom of the tower body 1 is welded with two spiral blades to form a spiral flow channel 12. The inner end of the air inlet pipe 6 is connected to the upper part of the spiral flow channel 12. The spiral flow channel 12 guides the incoming exhaust gas to the liquid surface at the bottom of the inner cavity of the tower body 1. The inner cavity bottom of the tower body 1 is equipped with a concentric flow guide 13 through a spoke rod. The bottom diameter of the flow guide 13 is smaller than the inner diameter of the tower body 1. The flow guide 13 is a conical cylindrical shell with a small upper part and a large lower part, and the flow guide 13 is located in the middle of the spiral flow channel 12. The incoming exhaust gas first moves downward along the spiral flow channel 12 to collide with the water surface, and then flows upward in a spiral, and the rotation speed is further increased by the spiral plate assembly 9. A plurality of evenly arranged spiral plate assemblies 9 are installed inside the tower body 1 along the height direction. A baffle-type demister 3 is installed at the upper end of the tower body 1. An exhaust pipe 5 is installed at the upper end of the demister 3. The demister 3 is used to separate water vapor from the flue gas after dust removal.

[0015] The swirl plate assembly 9 includes a flange ring 91, the cross section of the flange ring 91 is L-shaped, and a number of evenly distributed fan blades 92 are welded along the circumference of the inner side of the flange ring 91, and the fan blades 92 are inclined. After the airflow axially passes through the swirl plate assembly 9, a further enhanced swirl is formed, and the particulate impurities in the flue gas collide and condense with the droplets to form a water-ash mixture. Since the water-ash mixture has a relatively large mass, it moves toward the inner wall of the tower body 1 under the action of centrifugal force in the swirl and adheres to the inner wall and moves downward.

[0016] An annular water tank 11 is formed between the outer side of the flange ring 91 and the tower body 1. The water tank 11 is used to collect the water-ash mixture separated from the flue gas. The bottom of the water tank 11 is provided with a plurality of through holes 93 along the circumference. The lower end of the base 2 is connected to the circulating water tank 7 through a pipeline. Multiple layers of horizontally arranged spray pipes 10 are installed in the tower body 1. A water pump is arranged inside the circulating water tank 7. The output end of the water pump is connected to the water supply pipe 8. The spray pipes 10 are connected to the water supply pipe 8 respectively. The top spray pipe 10 is located above the top rotary plate assembly 9. The spray pipe 10 sprays water to cover all the rotary plate assemblies 9. The spray pipe 10 is grid-shaped and has multiple nozzles installed on the lower side to cover the cross section of the tower body 1. The spray water circulates between the base 2 and the circulating water tank 7. The water droplets or water mist sprayed by the nozzles condense with the dust particles to increase the mass, which is convenient for the swirl sedimentation.

[0017] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wet cyclone dust collector, comprising a tower body (1), a circulating water tank (7) and a spray assembly, wherein the tower body (1) is a cylindrical structure, a base (2) with a cone bucket is fixedly mounted at the bottom of the tower body (1), and a support leg (4) is mounted at the lower part of the base (2), characterized in that: The bottom side of the tower body (1) is provided with an air intake pipe (6) connected tangentially, and the inner wall of the bottom of the tower body (1) is formed with a spiral flow channel (12) by welding two spiral blades. The inner end of the air intake pipe (6) is connected to the upper part of the spiral flow channel (12), and the spiral flow channel (12) guides the incoming exhaust gas to the liquid surface at the bottom of the inner cavity of the tower body (1). The bottom of the inner cavity of the tower body (1) is equipped with a concentric guide cover (13) through a spoke rod. The guide cover (13) is a conical cylindrical shell with a small upper part and a large lower part, and the guide cover (13) is located in the middle of the spiral flow channel (12). A plurality of evenly arranged rotary plate assemblies (9) are installed inside the tower body (1) along the height direction, the rotary plate assembly (9) comprises a flange ring (91), a plurality of evenly distributed fan blades (92) are welded along the circumference of the inner side of the flange ring (91), the fan blades (92) are arranged in an inclined manner, and the rotating airflow increases its rotation speed after passing through the rotary plate assembly (9), an annular water tank (11) is formed between the outer side of the flange ring (91) and the tower body (1), and a plurality of penetrating through holes (93) are arranged at the bottom of the water tank (11) along the circumference.

2. A wet cyclone dust collector according to claim 1, characterized in that: A baffle-type demister (3) is installed at the upper end of the tower body (1), and an exhaust pipe (5) is installed at the upper end of the demister (3).

3. A wet cyclone dust collector according to claim 2, characterized in that: The uppermost spray pipe (10) is located above the uppermost rotary plate assembly (9), and the spray pipe (10) sprays water to cover all the rotary plate assemblies (9).

4. A wet cyclone dust collector according to claim 3, characterized in that: The spray assembly comprises a circulating water tank (7), a water pump and a spray pipe (10); the lower end of the base (2) is connected to the circulating water tank (7) through a pipeline; multiple layers of horizontally arranged spray pipes (10) are installed in the tower body (1); the water pump is arranged inside the circulating water tank (7); the output end of the water pump is connected to a water supply pipe (8); and the spray pipes (10) are respectively connected to the water supply pipes (8).

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