Single-channel fault intelligent on-off high-voltage electrostatic dust collection system

Abstract

According to the electrostatic dust collection device, single-electric-field single-channel high-voltage power supply is adopted, and high-voltage power supply can be intelligently cut off after a single channel breaks down. In practical application of existing equipment, high voltage is reduced due to failure of a cathode discharge component and an anode dust collection component in a single channel, so that the dust removal efficiency of a plurality of single channels powered by the same high-voltage power supply is lowered. By adopting the technology, high-voltage power supply of a single dust collection channel can be automatically cut off when the single dust collection channel breaks down, high-voltage operation of other normal dust collection channels powered by the same high-voltage power supply is ensured, the dust collection efficiency of electrostatic dust collection is ensured to the maximum extent, the time for troubleshooting a fault position in maintenance work is shortened, and the maintenance efficiency is improved. And the full-cycle high-efficiency working time of the dust removal equipment is ensured.

Description

Technical Field

[0001] The present invention relates to an electrostatic dust removal system, and in particular to an electrostatic dust removal device that can autonomously detect single-channel power supply parameters, use single-field single-channel high-voltage power supply, and automatically disconnect the high-voltage power supply after a single-channel failure. It belongs to the field of dust removal technology for controlling industrial atmospheric dust pollution. Background Art

[0002] Electrostatic dust removal is a supporting equipment for industrial dust control. Its function is to remove particulate dust in the flue gas, thereby greatly reducing the amount of dust discharged into the atmosphere. This is an important environmental protection equipment for controlling environmental pollution and improving air quality. Electrostatic dust removal equipment is divided into 1-5 electric fields according to the structure, and each electric field is divided into several channels. Each channel includes a cathode discharge component and an anode dust collection component. Usually, one electric field is equipped with a high-voltage power supply to provide high-voltage power supply for the dust collector. According to the theory of electrostatic dust removal, the high voltage between the cathode and the anode and the dust collection area of ​​the anode are the key to the efficiency of electrostatic dust removal. In practical applications, because a certain point of the cathode discharge component or the anode dust collection component in the entire channel fails, the voltage of the entire electric field is reduced, thereby reducing the dust removal efficiency of multiple channels powered by the same high-voltage power supply; even more, when a serious fault occurs, the high-voltage power supply cannot be started normally, resulting in the invalid dust removal capacity of multiple single channels powered by the same high-voltage power supply, which is equivalent to the failure of the entire electric field, and the entire electric field anode dust collection area is invalid, which seriously affects the dust removal efficiency of the electrostatic dust removal equipment. Summary of the invention

[0003] The purpose of the present invention is to solve the defects existing in the prior art and to propose an electrostatic dust removal device which can autonomously detect single-channel power supply parameters, adopt single electric field single-channel high-voltage power supply and can automatically disconnect the high-voltage power supply after a single channel failure.

[0004] To achieve the above objectives, the present invention provides a single-channel fault intelligent on-off high-voltage electrostatic dust removal system, including: a purification box, a dust collecting electric field, a dust collecting channel, an anode dust collecting plate, a cathode discharge wire, a cathode frame, a cathode frame insulating support assembly, a high-voltage power supply, an electric high-voltage isolating switch, a cathode discharge current detection transformer, and a power supply parameter analyzer.

[0005] A plurality of dust collecting electric fields are arranged in the purification box, and the front end and the rear end of the purification box are respectively connected to the smoke inlet pipe and the smoke outlet pipe.

[0006] The dust collecting electric field is composed of a plurality of anode dust collecting plates and cathode frames arranged in sequence at intervals, two adjacent anode dust collecting plates and the cathode frame in the middle form a dust collecting channel, and the anode dust collecting plates are connected to the purification box body with the same potential.

[0007] The cathode frame is arranged with a plurality of cathode discharge wires, the upper part of the cathode frame is rigidly connected to the cathode frame insulating support assembly, the cathode frame is suspended in the middle of the dust collecting channel through the cathode frame insulating support assembly, and is insulated from the anode dust collecting plates and the purification box on the adjacent two sides, and the plurality of cathode frames in the purification box are insulated from each other.

[0008] The cathode frame insulating support assembly consists of a solid insulating support tube, a conductive suspension hanger, and a support cover plate. The solid insulating support tube is arranged on the top of the purification box, is made of insulating material, and is insulated from the purification box. The conductive suspension hanger passes through the central hole of the solid insulating support tube, is rigidly connected to the cathode frame at the bottom, is connected to the support cover plate at the top, and is connected to the electric high-voltage disconnector through an electrical line.

[0009] The electric high-voltage isolating switch is a high-voltage resistant device. The electric high-voltage isolating switch is controlled by a power supply parameter analyzer. The high-voltage electric energy output by the high-voltage power supply is introduced into the cathode discharge line as needed. An electric high-voltage isolating switch is arranged in one dust collecting channel. The on and off of the electric high-voltage isolating switch is used to control whether the dust collecting channel forms a high-voltage electrostatic field for dust collecting operation.

[0010] The high-voltage power supply is a high-voltage, low-current DC power supply. The output voltage and current signals of the high-voltage power supply are uploaded to the power supply parameter analyzer in real time and controlled by the power supply parameter analyzer. The high-voltage power supply is electrically connected to the electric high-voltage isolating switch. The high-voltage electric energy output by the high-voltage power supply is transmitted to the cathode discharge line through the electric high-voltage isolating switch, the cathode frame insulating support assembly, and the cathode frame in sequence, so that a high-voltage electrostatic field is formed between the cathode discharge line and the anode dust collecting plate.

[0011] The cathode discharge current detection transformer is an electrical component used to detect cathode current parameters. It is arranged on the electrical circuit between the high-voltage power supply and the cathode frame insulating support assembly. One cathode discharge current detection transformer is arranged in one dust collecting channel. The cathode power supply current parameters of each dust collecting channel are sensed by the coil, and the current parameters are uploaded to the power supply parameter analysis device through the electrical circuit for parameter analysis.

[0012] The power supply parameter analyzer collects electrical signal parameters from the high-voltage power supply and the cathode discharge current detection transformer in real time, analyzes and compares the data of the power supply parameter analyzer, and judges the operation status of the electrostatic precipitator, and controls the high-voltage power supply output and the on-off of the high-voltage isolation switch relay.

[0013] The working steps of the power supply parameter analyzer are as follows: Step 1, the power supply parameter analyzer is powered on and the sensor data is collected. The collected real-time data is compared with the data in the power supply parameter analyzer database. If the compared data is incorrect, a fault is prompted. If the compared data is correct, the next step is executed; Step 2, the power supply parameter analyzer controls the high-voltage isolation switch to close and starts the high-voltage power supply; Step 3, all cathode discharge current detection transformer electrical signal data are collected in real time, and the mean value is calculated. The cathode discharge current detection transformer electrical signal data and the mean value data of each dust collecting channel are respectively calculated by difference, and then the difference data is compared with the difference number set in the power supply parameter analyzer database. If it is less than the set value, it is determined that this dust collecting channel is working normally. If it is greater than the set value, it is determined that this dust collecting channel has a hidden danger of failure; Step 4, the high-voltage parameters output by the high-voltage power supply are compared with the high-voltage parameters set in the power supply parameter analyzer database. If it is less than the set value, the high-voltage isolation switch relay of the dust collecting channel determined to have a hidden danger of failure is disconnected, and a fault alarm display output of this channel is made; Steps 3 to 4 are executed in a loop.

[0014] The beneficial effects of the present invention are as follows: 1. When a single dust collecting channel fails, the high-voltage power supply of this dust collecting channel is automatically disconnected, ensuring the high-voltage operation of other normal dust collecting channels powered by the same high-voltage power supply, and maximizing the high-efficiency dust collection of electrostatic dust removal; 2. The indicator records the faulty dust collecting channel, which shortens the time for troubleshooting the fault location during maintenance work to the maximum extent, and ensures the high-efficiency full-cycle working time of the electrostatic dust removal equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 , front view schematic diagram of single-channel fault intelligent on-off high-voltage electrostatic precipitator system.

[0017] Figure 2 , left view schematic diagram of single-channel fault intelligent on-off high-voltage electrostatic precipitator system.

[0018] Figure 3 , top view schematic diagram of single-channel fault intelligent on-off high-voltage electrostatic precipitator system.

[0019] Figure 4 , schematic diagram of cathode system.

[0020] Figure 5 , schematic diagram of the cathode system from the left.

[0021] Figure 6 , cathode frame insulation support assembly.

[0022] Figure 7 , schematic diagram of the electrical system of the single-channel fault intelligent on-off high-voltage electrostatic precipitator system.

[0023] Figure 8, power supply parameter analyzer workflow diagram.

[0024] In the figure, 1, purification box, 2, dust collecting electric field, 3, dust collecting channel, 4, anode dust collecting plate, 5, cathode discharge wire, 6, cathode frame, 7, cathode frame insulation support assembly, 8, high-voltage power supply, 9, electric high-voltage disconnector, 10, cathode discharge current detection transformer, 11, power supply parameter analyzer, 12, flue gas inlet, 13, flue gas outlet, 14, high-voltage cable, 15, solid insulation support cylinder, 16, conductive suspension boom, 17, electrical line, 18, insulation box on top of purification box, 19, support cover, 20, dust collecting hopper. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0027] In this embodiment, a single-channel fault intelligent on-off high-voltage electrostatic dust removal system is arranged according to a horizontal dry electrostatic field and is divided into four electric fields, each of which is provided with a power supply parameter analyzer; each electric field is composed of 11 dust collecting channels and is powered by a high-voltage power supply; each dust collecting channel is provided with an electric high-voltage isolating switch and a cathode discharge current detection transformer, and each cathode frame is suspended in the middle of the dust collecting channel through two groups of cathode frame insulating support components; the high-voltage electric energy output by the high-voltage power supply is transmitted to the cathode discharge line through a high-voltage cable in turn through the high-voltage isolating switch, the cathode frame insulating support component, and the cathode frame, so that a high-voltage electrostatic field is formed between the cathode discharge line and the anode dust collecting plate to perform dust collection operations.

[0028] Four dust collecting electric fields (2) are arranged in the purification box (1). The flue gas inlet (12) and the flue gas outlet (13) of the purification box (1) are connected to the flue gas inlet pipe and the flue gas outlet pipe respectively. A purification box top insulation box (18) is arranged on the top of the purification box (1). A dust collecting hopper (20) is arranged on the bottom of the purification box (1) for recovering flue dust. Each dust collecting electric field (2) is composed of 12 anode dust collecting plates (4) and 11 cathode frames (6) arranged in sequence. Two adjacent anode dust collecting plates (4) and the middle cathode frame (6) form a dust collecting channel (3). A total of 11 dust collecting channels are provided in one electric field. The anode dust collecting plates (4) are connected to the purification box (1) at the same potential. The cathode frame (6) is arranged with a plurality of cathode discharge wires (5). The upper part of the cathode frame (6) is rigidly connected to the cathode frame insulation support assembly (7). The cathode frame (6) is suspended in the middle of the dust collecting channel (3) through the cathode frame insulating support assembly (7), and is insulated from the anode dust collecting plates (4) and the purification box (1) on both sides. All cathode frames (6) in the purification box (1) are insulated from each other. The cathode frame insulating support assembly (7) is composed of a solid insulating support tube (15), a conductive suspension rod (16) and a support cover plate (19). The solid insulating support tube (15) is arranged in an insulation box (18) at the top of the purification box, is made of insulating material, and is insulated from the purification box (1). The conductive suspension rod (16) passes through the central hole of the solid insulating support tube (15), is mechanically connected to the cathode frame (6) at the bottom, is mechanically connected to the support cover plate (19) at the top, and is connected to the electric high-voltage disconnector (9) through an electrical line. The electric high-voltage isolating switch (9) is a high-voltage resistant on-off device. The electric high-voltage isolating switch (9) is controlled by a power supply parameter analyzer (11). Depending on the situation, the high-voltage electric energy output by the high-voltage power supply (8) is introduced into the cathode discharge line (5). The on-off of the electric high-voltage isolating switch (9) is used to control whether the dust collection channel (3) forms a high-voltage electrostatic field dust collection operation. The high-voltage power supply (8) is a high-voltage, low-current DC power supply. The output voltage and current signals of the high-voltage power supply (8) are uploaded to the power supply parameter analyzer (11) in real time and are controlled by the power supply parameter analyzer (11). The cathode discharge current detection transformer (10) is an electrical component for detecting cathode current parameters. The cathode power supply current parameters of the dust collection channel are sensed by a coil, and the current parameters are uploaded to the power supply parameter analysis (11) via an electrical line. The power supply parameter analyzer (11) collects the electrical signal parameters from the high-voltage power supply (8) and the cathode discharge current detection transformer (10) in real time, and after the power supply parameter analyzer (11) analyzes, compares and judges the operation of the electrostatic dust removal device, controls the output voltage of the high-voltage power supply (8) and the on and off of the electric high-voltage isolation switch (9); the working process of the power supply parameter analyzer (11) is referenced Figure 8 .

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A single-channel fault intelligent on-off high-voltage electrostatic dust removal system, characterized in that: include: A plurality of cathode frames insulated from each other are arranged, the cathode frames are insulated from the anode dust collecting plates on the adjacent two sides and form a dust collecting channel, a plurality of cathode discharge wires are installed on the cathode frames, the cathode discharge wires are connected to the output end of the high-voltage power supply in sequence through the cathode frame, the cathode frame insulating support assembly, the electric high-voltage isolating switch, and the cathode discharge current detection transformer, a plurality of dust collecting channels share a high-voltage power supply and form a dust collecting electric field, a plurality of dust collecting electric fields are arranged in the purification box, a power supply parameter analyzer collects signals from the cathode discharge current detection transformer and the high-voltage power supply, and controls the on and off of the electric high-voltage isolating switch and the high-voltage output enable of the high-voltage power supply.

2. According to claim 1, a single-channel fault intelligent on-off high-voltage electrostatic precipitator system is characterized by: The upper part of the cathode frame is rigidly connected to the cathode frame insulating support assembly, and the cathode frame is suspended in the middle of the dust collecting channel through the cathode frame insulating support assembly and is insulated from the purification box.

3. According to claim 1, a single-channel fault intelligent on-off high-voltage electrostatic precipitator system is characterized by: The dust collecting electric field is composed of a plurality of anode dust collecting plates and cathode frames arranged in sequence at intervals, two adjacent anode dust collecting plates and the cathode frame in the middle form a dust collecting channel, and the anode dust collecting plates are connected to the purification box body with the same potential.

4. According to claim 1, a single-channel fault intelligent on-off high-voltage electrostatic precipitator system is characterized by: The cathode frame insulating support assembly consists of a solid insulating support tube, a conductive suspension hanger, and a support cover. The solid insulating support tube is arranged on the top of the purification box, is made of insulating material, and is insulated from the purification box. The conductive suspension hanger passes through the central hole of the solid insulating support tube, is mechanically connected to the cathode frame at the bottom, is mechanically connected to the support cover at the top, and is connected to the high-voltage disconnector through an electrical line.

5. According to claim 1, a single-channel fault intelligent on-off high-voltage electrostatic precipitator system is characterized by: The electric high-voltage isolating switch is controlled by a power supply parameter analyzer. One electric high-voltage isolating switch is arranged in one dust collecting channel. Whether the dust collecting channel forms a high-voltage electrostatic field dust collecting operation is controlled by turning on and off the high-voltage isolating switch.

6. A single-channel fault intelligent on-off high-voltage electrostatic precipitator system according to claim 1, characterized in that: The high-voltage power supply is a high-voltage, low-current DC power supply, which forms a high-voltage electrostatic field between the cathode discharge line and the anode dust collecting plate. The output voltage and current signals of the high-voltage power supply are uploaded to the power supply parameter analyzer in real time and are controlled by the power supply parameter analyzer.

7. A single-channel fault intelligent on-off high-voltage electrostatic precipitator system according to claim 1, characterized in that: The cathode discharge current detection transformer is an electrical component used to detect cathode current parameters. It is arranged on the electrical circuit between the high-voltage power supply and the cathode frame insulating support assembly. One cathode discharge current detection transformer is arranged in one dust collecting channel. The cathode power supply current parameters of each dust collecting channel are sensed by the coil, and the current parameters are uploaded to the power supply parameter analysis device through the electrical circuit for parameter analysis.

8. A single-channel fault intelligent on-off high-voltage electrostatic precipitator system according to claim 1, characterized in that: The front end and the rear end of the purification box are respectively connected to the smoke inlet pipe and the smoke outlet pipe.

9. A single-channel fault intelligent on-off high-voltage electrostatic precipitator system according to claim 1, characterized in that: The working steps of the power supply parameter analyzer are as follows: Step 1: Power on the power supply parameter analyzer, collect sensor data, and compare the collected real-time data with the power supply parameter analyzer database data. If the compared data is incorrect, a fault is prompted. If the compared data is correct, proceed to the next step. Step 2: The power supply parameter analyzer controls the high-voltage isolation switch to close, enabling the high-voltage power supply to start. Step 3: Collect all cathode discharge current detection transformer electrical signal data in real time and perform mean calculation. Perform difference calculation on the cathode discharge current detection transformer electrical signal data and mean data of each dust collection channel respectively. Then compare the difference data with the difference number set in the power supply parameter analyzer database. If it is less than the set value, it is determined that this dust collection channel is working normally. If it is greater than the set value, it is determined that this dust collection channel has a hidden danger of failure. Step 4: Compare the high voltage output of the high voltage power supply with the high voltage parameter set in the power supply parameter analyzer database. If it is less than the set value, the high voltage isolation switch relay of the dust collection channel that is judged to have a potential fault will be disconnected, and a fault alarm display output will be made for this channel. Step 5: Repeat steps 3 to 4 until the device is turned off.

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