Wet type electric dust removal device

Abstract

The utility model discloses a wet type electric dust removal device which comprises an air duct, the air duct is vertically arranged, an air distribution assembly, an electric field generation module and a spraying assembly are sequentially arranged in the air duct from bottom to top, and insulating layers are arranged between the electric field generation module and the air duct and between the spraying assembly and the air duct. The space, corresponding to the spraying assembly, of the inner cavity of the insulating layer is arranged to be a heating area. The wet electric dust collector solves the problem that the dust collection effect is reduced due to the fact that an electric field is unstable and easy to lose efficacy in existing wet electric dust collection.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal devices, in particular to a wet electric dust removal device. Background Art

[0002] In the dust removal of kiln gas emissions during the preparation of soda ash, a wet electrostatic precipitator process is adopted. In the existing wet electrostatic precipitator equipment, the cathode filament is easily affected by the airflow and swings, resulting in an unstable electric field; the kiln gas is easily condensed and contacts the electrodes and pipes with the spray water, causing corrosion, and the resulting oxide scale will fall and connect with the electrode wires, causing an electric field short circuit; the distance between the anode and cathode is small and unstable, causing the cathode filament to discharge frequently and be easily interrupted, resulting in electric field failure. For these multiple reasons, the dust removal effect is relatively low. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a wet electrostatic precipitator to solve the problem that the electric field in the existing wet electrostatic precipitator is unstable and prone to failure, thereby reducing the dust removal effect.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a wet electrostatic precipitator, comprising a wind duct, which is vertically arranged, and in which an air distribution assembly, an electric field generating module and a spray assembly are arranged in sequence from bottom to top, an insulating layer is arranged between the electric field generating module and the spray assembly and the wind duct, and the inner cavity of the insulating layer corresponding to the space of the spray assembly is set as a heating zone.

[0005] Furthermore, the electric field generating module is provided with an anode assembly and a cathode assembly, and a plurality of annular ventilation channels are formed between the anode assembly and the cathode assembly. The plurality of annular ventilation channels are evenly distributed on the cross section of the wind cylinder, and the annular ventilation channels are arranged axially along the wind cylinder.

[0006] Furthermore, the anode assembly is a honeycomb structure composed of a number of hexagonal anode tubes, and the cathode assembly is provided with cathode wires corresponding to each of the anode tubes, and the cathode wires are suspended at the center position of the corresponding anode tubes, and the upper ends of the plurality of cathode wires are connected and fixed to the inner wall of the insulating layer through a frame structure, and a counterweight is suspended at the bottom of the cathode wire.

[0007] Furthermore, a heating module is embedded in the annular inner wall of the heating zone, and a heat-insulating layer is attached to the inner wall surface of the heating zone.

[0008] Furthermore, the insulating layer is provided with a quartz tube, and the upper end surface of the quartz tube is provided with a sealing top cover.

[0009] Furthermore, the air distribution assembly is provided with a plurality of diversion orifice plates, and the plurality of diversion orifice plates are arranged at axial spacing along the air duct, the opening rates of the plurality of diversion orifice plates are arranged to decrease from bottom to top, and the apertures of the ventilation holes of the plurality of diversion orifice plates are arranged to decrease from bottom to top.

[0010] Beneficial effects: The wet electrostatic precipitator of the utility model generates a stable electric field through an electric field generating module with a stable frame structure, and sets a heating zone to prevent gas condensation from corroding the device and causing the electric field to fail, thereby improving the dust removal efficiency and effect, and at least includes the following advantages:

[0011] (1) Reduce the dust content of kiln gas sent to the compression workshop, reduce dust accumulation and scarring on the compressor inlet and outlet pipelines and towers, increase the compressor's air volume, reduce the number of compressor shutdowns and cleaning work, effectively extend the compressor's operating cycle and operating efficiency, and reduce inspection and maintenance costs.

[0012] (2) The air inlet pressure of the electrostatic precipitator and the pressure of the kiln gas main pipe dropped significantly, which effectively increased the kiln gas flow rate and reduced the kiln gas flow resistance. The top temperature and top pressure of the lime kiln dropped significantly, which had a positive effect on stabilizing the kiln conditions, created conditions for the operation and adjustment of the lime kiln, further improved the quality of gas ash, and created favorable conditions for reducing consumption and the next process.

[0013] (3) Effectively ensure the quality of soda ash products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic cross-sectional view of the overall structure of an embodiment of the utility model;

[0015] Attached Figure 2 This is a structural schematic diagram of an electric field generating module in one embodiment of the utility model;

[0016] Attached Figure 3 The utility model is a schematic cross-sectional view of an insulating layer and its corresponding internal structure according to an embodiment. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] As attached Figure 1-3 The wet electrostatic precipitator comprises a wind tube 1, which is arranged vertically. A wind distribution component 2, an electric field generating module 3 and a spray component 4 are arranged in sequence from bottom to top in the wind tube 1, and an insulating layer 5 is arranged between the electric field generating module 3 and the spray component 4 and the wind tube 1. The inner cavity of the insulating layer 5 corresponding to the space of the spray component 4 is set as a heating zone 6. The wind tube is a vertical cylindrical structure, and adopts a carbon steel lining P0 structure.

[0019] This solution heats the gas after wet electrostatic precipitator by providing a heating zone, so as to prevent the corrosive liquid formed by condensation of kiln gas after spray dust removal from dripping onto the electric field generating module, thereby avoiding equipment corrosion and electric field failure. At the same time, the electric field generating module adopts a rigid frame structure, so that the size of the electric field is not affected by the airflow, and the stability and safety of the generated electric field can be effectively maintained, thereby obtaining a better dust removal effect and extending the service life of the dust removal device.

[0020] The electric field generating module 3 is provided with an anode assembly 7 and a cathode assembly 8, and a plurality of annular ventilation channels 9 are formed between the anode assembly 7 and the cathode assembly 8, and the plurality of annular ventilation channels 9 are evenly distributed on the cross section of the wind tube 1, and the annular ventilation channels 9 are arranged axially along the wind tube 1. After the dusty kiln gas is divided and distributed by the air distribution assembly 2, it is evenly distributed in the plurality of annular ventilation channels, and an electric field is formed in the annular ventilation channels. When the dusty kiln gas passes through, the dust is adsorbed and adhered to the annular wall of the annular ventilation channel, and the primary dust removal is realized. Then the gas continues to pass through the spraying area, and the remaining dust in the kiln gas is adsorbed on the water droplets of the mist, and the secondary dust removal is realized. The water mist adsorbing the dust falls on the annular wall of the ventilation channel below, and converges to form a water flow, which washes the dust adsorbed on the annular wall, realizes self-cleaning, and maintains a continuous dust removal effect.

[0021] Preferably, the anode assembly 7 is a honeycomb structure composed of a plurality of hexagonal anode tubes, and the cathode assembly 8 is provided with cathode wires 81 corresponding to the anode tubes, and the cathode wires 81 are suspended at the center of the corresponding anode tubes, and the upper ends of the plurality of cathode wires 81 are connected and fixed to the inner wall of the insulating layer 5 through a frame structure 82, and a counterweight 83 is suspended at the bottom of the cathode wires. The honeycomb anode tube group is constrained at a fixed position in the air duct by the insulating layer, and the honeycomb structure can ensure the maximum ventilation volume, thereby improving the dust removal efficiency.

[0022] Among them, the cathode wire adopts a serrated corona wire, and both the anode tube and the cathode wire are made of 304 stainless steel, which can increase the intensity of current and electric field.

[0023] In addition, the relative position of each cathode wire is fixed by a frame structure, and a counterweight is hung at the bottom to ensure that the cathode wire has the corresponding strength and the concentricity between it and the anode tube, as well as its own verticality, so that the cathode wire is not affected by the airflow and swings, ensuring the stability of the pole distance, so that the electric field can transmit electricity stably. Among them, the frame structure is a cross disc structure. Among them, the counterweight adopts a spherical weight made of carbon steel or cast steel, and the outside is wrapped with PP engineering plastic.

[0024] A heating module is embedded in the annular inner wall of the heating zone 6. The heating module can use evenly distributed heating wires to avoid condensation of gas by electric heating. An insulation layer 61 is attached to the inner wall surface of the heating zone 6. The insulation layer uses insulation material of aluminum silicate fiber.

[0025] The insulating layer 5 is provided with a quartz tube 51, and the upper end surface of the quartz tube 51 is provided with a sealing top cover 52 made of special sealing material, which plays a role of insulating sealing, avoids short circuit of the embedded heating wire caused by spraying water, and ensures safety.

[0026] The air distribution component 2 is provided with a plurality of diverter orifice plates 21, and a plurality of the diverter orifice plates 21 are arranged at axial intervals along the air duct 1, and the opening rate of the plurality of the diverter orifice plates 21 is set to decrease from bottom to top, and the aperture of the ventilation holes of the plurality of the diverter orifice plates 21 is set to decrease from bottom to top. Preferably, two upper and lower diverter orifice plates are provided, wherein the aperture of the lower orifice plate is relatively large and the ventilation is high, while the aperture of the upper orifice plate is relatively small and the ventilation is slightly low, so that more holes are distributed on the upper orifice plate, and the airflow is subjected to a certain resistance after passing through the two diverter orifice plates, so that the speed of the airflow passing through the electric field is reduced, allowing the electric field to fully capture dust without causing excessive airflow resistance, and after passing through the two diverter orifice plates, it is more conducive to the airflow distribution gradually becoming uniform.

[0027] The spray assembly 4 includes a plurality of atomizing nozzles, and a plurality of atomizing spray groups are evenly arranged above the electric field generating module, and each nozzle has an average overlap of at least 130%, so that flushing and dust removal are more uniform, and the flushing and dust removal effects are better.

[0028] In the selection of electrical control system, the constant current source is mainly composed of three-phase rectifier filter circuit, 1GBT full-bridge resonant inverter circuit, high-voltage rectifier transformer and control circuit. It includes high-voltage rectifier equipment, electric field high-voltage DC, damping resistor, and high-voltage isolation switch cabinet; among them, the high-voltage rectifier equipment and high-voltage isolation switch cabinet are arranged on the top of the main body of the dust removal device, adopting outdoor rainproof and dustproof structure, and the junction box is sealed. The high-voltage rectifier equipment is set with oil temperature alarm, which alarms when the oil temperature reaches 80℃, and automatically cuts off the high-voltage power supply when the oil temperature reaches 85℃. The primary current, voltage and secondary current and voltage of the high-voltage rectifier equipment are led to the main control touch screen for display.

[0029] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A wet electrostatic precipitator, characterized in that: The invention comprises a wind tube (1), wherein the wind tube (1) is arranged vertically, and an air distribution component (2), an electric field generating module (3) and a spray component (4) are arranged in sequence from bottom to top in the wind tube (1); an insulating layer (5) is arranged between the electric field generating module (3) and the spray component (4) and the wind tube (1); and the inner cavity of the insulating layer (5) corresponding to the space of the spray component (4) is arranged as a heating zone (6).

2. A wet electrostatic precipitator according to claim 1, characterized in that: The electric field generating module (3) is provided with an anode assembly (7) and a cathode assembly (8), and a plurality of annular ventilation channels (9) are formed between the anode assembly (7) and the cathode assembly (8), and the plurality of annular ventilation channels (9) are evenly distributed on the cross section of the wind cylinder (1), and the annular ventilation channels (9) are arranged axially along the wind cylinder (1).

3. A wet electrostatic precipitator according to claim 2, characterized in that: The anode assembly (7) is a honeycomb structure composed of a plurality of hexagonal anode tubes. The cathode assembly (8) is provided with cathode wires (81) corresponding to the respective anode tubes. The cathode wires (81) are suspended at the center position of the corresponding anode tubes. The upper ends of the plurality of cathode wires (81) are connected and fixed to the inner wall of the insulating layer (5) via a frame structure (82). A counterweight (83) is suspended at the bottom of the cathode wires.

4. A wet electrostatic precipitator according to claim 3, characterized in that: A heating module is embedded in the annular inner wall of the heating zone (6), and a heat-insulating layer (61) is attached to the inner wall surface of the heating zone (6).

5. A wet electrostatic precipitator according to claim 4, characterized in that: The insulating layer (5) is provided with a quartz tube (51), and the upper end surface of the quartz tube (51) is provided with a sealing top cover (52).

6. A wet electrostatic precipitator according to claim 5, characterized in that: The air distribution component (2) is provided with a plurality of diversion orifice plates (21), and the plurality of diversion orifice plates (21) are arranged at axial intervals along the air cylinder (1), the opening rates of the plurality of diversion orifice plates (21) are arranged to decrease from bottom to top, and the apertures of the ventilation holes of the plurality of diversion orifice plates (21) are arranged to decrease from bottom to top.

Images