High-voltage electrostatic dust collection control system

Abstract

The utility model relates to the technical field of electrostatic dust collection, in particular to a high-voltage electrostatic dust collection control system which comprises an intermediate frequency control panel, a control cabinet panel and external equipment, the intermediate frequency control panel comprises a terminal I1S and a terminal GND which are used for being connected with a primary current display of an ampere meter A1; a terminal I2S and a terminal GND are connected with a secondary current display of the ampere meter A2; the terminals U and V are used for being connected with a voltmeter V1 for primary voltage display; the terminals V2S and GND are used for being connected with a voltmeter V2 for secondary voltage display; the control cabinet panel comprises a terminal I21 and a GND secondary current sampling input 0-10V; the secondary voltage sampling input of the terminal V21 and the GND is minus 10-0V; the terminals IDS and GND output voltage given input is 4-20MA; and the oil temperature input of the terminal TBYQ and GND transformers is 4-20MA. According to the utility model, the efficiency is higher by utilizing the intermediate frequency characteristic of the transformer, the optimal working frequency can be set according to a medium, the bias excitation effect of the transformer during clearance operation is eliminated by utilizing the virtual zero-point technology, and the primary and secondary side two-stage spark treatment is more reasonable and safer.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic dust removal, in particular to a high-voltage electrostatic dust removal control system. Background Art

[0002] In the existing environmental dust removal systems, high-voltage electrostatic dust removal has obvious advantages, but the equipment technology is difficult, so developing different types of control panels to meet higher market requirements has become an important choice for the industry to break the market's homogeneous competition.

[0003] Therefore, we propose a high-voltage electrostatic dust removal control system to solve the above problems. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a high-voltage electrostatic dust removal control system to solve the technical problem in the existing technology that "in the existing environmental protection dust removal system, the high-voltage electrostatic dust removal effect has obvious advantages, but the equipment technology is difficult, so the development of different types of control panels to meet the higher requirements of the market has become an important choice for the industry to break the market homogeneity competition."

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A high-voltage electrostatic dust removal control system includes a medium-frequency control board, a control cabinet panel and external equipment.

[0007] The intermediate frequency control board includes:

[0008] Terminals I1S and GND are used to connect ammeter A1 to display the primary current;

[0009] Terminals I2S and GND are connected to ammeter A2 for secondary current display;

[0010] Terminals U and V are used to connect voltmeter V1 for primary voltage display;

[0011] Terminals V2S and GND are used to connect the voltmeter V2 to display the secondary voltage;

[0012] The control cabinet panel includes,

[0013] Terminals I21 and GND are for secondary current sampling input 0-10V;

[0014] Terminals V21 and GND secondary voltage sampling input -10-0V;

[0015] Terminals IDS and GND output voltage setting input 4-20MA;

[0016] Terminals TBYQ, GND transformer oil temperature input 4-20MA;

[0017] Terminals DSI and GND secondary current output 0-10V;

[0018] Terminals DSV and GND secondary voltage output 0-10V;

[0019] Terminals RS485+ and RS485- are used for host computer communication;

[0020] Terminal REV is used to output the operating status of the control panel module;

[0021] Terminal RES is used to output the effective status of IPC operation control of the control panel module;

[0022] Terminal SW is used for IPC start-up blocking output of control panel module;

[0023] Terminal FAL, used for fault output of control panel module;

[0024] Terminal RUN is used to input the start command of the control panel module;

[0025] Terminal F / R, used for DCS start permission of control panel module;

[0026] Terminal FRE, used for control panel module’s given switching UI;

[0027] Terminal RST is used for disconnection detection of the control panel module;

[0028] Terminal SAK, used for safety interlock of control panel module;

[0029] Terminal ZD is used for vibration and hammering of the dust collecting plate of the control panel module;

[0030] Terminal T85 is used for the switch input of the control panel module when the transformer oil temperature exceeds 85 degrees; terminal CO is used for the carbon monoxide alarm of the control panel module;

[0031] The external device includes:

[0032] A transformer for stepping up the primary output voltage given at terminal IDS;

[0033] Damper, used to prevent resonance in the output circuit and protect the rectifier transformer;

[0034] High-voltage isolating switch, used to isolate voltage when repairing external equipment;

[0035] The electric field air duct is used to ionize the electric charge so that it is adsorbed on the dust entering the air duct and collected by the dust collecting plates.

[0036] As a preferred technical solution of the present invention, the control cabinet panel also includes an auxiliary power supply terminal for connecting an external 24V backup power supply to power itself.

[0037] As the preferred technical solution of the present invention, the power terminals R / S / T of the intermediate frequency control board are externally connected to a three-phase AC 50Hz, rated voltage 380V power supply, and the load terminals U / V are electrically connected to the low-voltage side of the transformer in the external device.

[0038] As a preferred technical solution of the present invention, the control cabinet panel terminal I21 / V21 / GND is electrically connected to the high voltage side of the transformer.

[0039] As a preferred technical solution of the present utility model, the transformer, damping resistor, isolating switch and dust collecting electrode are electrically connected in sequence.

[0040] The utility model provides a high-voltage electrostatic dust removal control system, which has the following beneficial effects:

[0041] 1. The control board we developed utilizes the medium frequency characteristics of the transformer, which is more efficient. It can also set the optimal operating frequency according to the medium.

[0042] 2. Use virtual zero-point technology to eliminate the biased excitation effect of the transformer during intermittent operation; the two-stage spark processing on the primary and secondary sides is more reasonable and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a terminal wiring diagram of a high-voltage electrostatic dust removal control system proposed in this utility model. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments:

[0046] refer to Figure 1 , a high-voltage electrostatic dust removal control system, including a medium-frequency control board, a control cabinet panel and external equipment,

[0047] The intermediate frequency control board includes:

[0048] Terminals I1S and GND are used to connect ammeter A1 to display the primary current;

[0049] Terminals I2S and GND are connected to ammeter A2 for secondary current display;

[0050] Terminals U and V are used to connect voltmeter V1 for primary voltage display;

[0051] Terminals V2S and GND are used to connect the voltmeter V2 to display the secondary voltage;

[0052] The control cabinet panel includes,

[0053] Terminals I21 and GND are for secondary current sampling input 0-10V;

[0054] Terminals V21 and GND secondary voltage sampling input -10-0V;

[0055] Terminals IDS and GND output voltage setting input 4-20MA;

[0056] Terminals TBYQ, GND transformer oil temperature input 4-20MA;

[0057] Terminals DSI and GND secondary current output 0-10V;

[0058] Terminals DSV and GND secondary voltage output 0-10V;

[0059] Terminals RS485+ and RS485- are used for host computer communication;

[0060] Terminal REV is used to output the operating status of the control panel module;

[0061] Terminal RES is used to output the effective status of IPC operation control of the control panel module;

[0062] Terminal SW is used for IPC start-up blocking output of control panel module;

[0063] Terminal FAL, used for fault output of control panel module;

[0064] Terminal RUN is used to input the start command of the control panel module;

[0065] Terminal F / R, used for DCS start permission of control panel module;

[0066] Terminal FRE, used for control panel module’s given switching UI;

[0067] Terminal RST is used for disconnection detection of the control panel module;

[0068] Terminal SAK, used for safety interlock of control panel module;

[0069] Terminal ZD is used for vibration and hammering of the dust collecting plate of the control panel module;

[0070] Terminal T85 is used for the switch input of the control panel module when the transformer oil temperature exceeds 85 degrees;

[0071] Terminal CO is used for carbon monoxide alarm of control panel module;

[0072] The external device includes:

[0073] A transformer for stepping up the primary output voltage given at terminal IDS;

[0074] Damper, used to prevent resonance in the output circuit and protect the rectifier transformer;

[0075] High-voltage isolating switch, used to isolate voltage when repairing external equipment;

[0076] The electric field air duct is used to ionize the electric charge so that it is adsorbed on the dust entering the air duct and collected by the dust collecting plates.

[0077] As a preferred technical solution of the present invention, the control cabinet panel also includes an auxiliary power supply terminal for connecting an external 24V backup power supply to power itself.

[0078] As the preferred technical solution of the present invention, the power terminals R / S / T of the intermediate frequency control board are externally connected to a three-phase AC 50Hz, rated voltage 380V power supply, and the load terminals U / V are electrically connected to the low-voltage side of the transformer in the external device.

[0079] As a preferred technical solution of the present invention, the control cabinet panel terminal I21 / V21 / GND is electrically connected to the high voltage side of the transformer.

[0080] As a preferred technical solution of the present utility model, the transformer, damping resistor, isolating switch and dust collecting electrode are electrically connected in sequence;

[0081] Compared with existing technologies, the control board we developed utilizes the medium-frequency characteristics of the transformer, which is more efficient. It can also set the optimal operating frequency according to the medium, and uses virtual 0-point technology to eliminate the transformer's biased excitation effect during intermittent operation. The two-stage spark processing on the primary and secondary sides is more reasonable and safer.

[0082] Specifically, the output is started, and the primary voltage output voltage V1 = 0-380V is given by the terminal IDS = 4-20MA. Through the step-up transformer T and the high-voltage rectifier silicon, a 40KV-100KV DC voltage is generated on the high-voltage side. It is connected to the electric field air duct through the damping resistor and the high-voltage isolation switch. The dust entering the air duct is adsorbed by the ionized charge. Under the action of the electric field force, the charged dust is collected by the dust collecting plate, and then the dust blocks are recovered by vibration hammering, thereby achieving safe and standard emission of boiler flues in power plants and the like;

[0083] The core technology of this utility model:

[0084] 1. Spark control

[0085] Generally speaking, the higher the voltage, the better the dust removal effect. However, due to the different media such as dust, it will ionize and break down, causing the electric field to short-circuit, thereby reducing the dust removal efficiency. Therefore, spark control must be used to automatically adjust the electric field voltage to solve this problem.

[0086] 2. Features: Rapidly restore the electric field after sparking (true flash), try not to cause sparks (false flash is allowed), and maintain the electric field stability;

[0087] Spark conditions: The change in secondary current I21 is greater than the set value; the change in secondary voltage V2I is greater than the set value; or the primary current I1S exceeds the limit. If any of these three conditions are met, spark treatment (rapid voltage reduction and rapid recovery) must be performed.

[0088] 3. Spark mode: four modes

[0089] 00-Upper limit mode operation: This mode can be selected for stable conditions, and the voltage size is given by IDS;

[0090] 01-Spark tracking mode: For medium with little change, the tracking mode can be adopted to adjust the appropriate voltage output;

[0091] 02-Gap mode: If the medium changes are complex and the above modes cannot be adopted, gap spark treatment can be selected;

[0092] 03-Debug mode: used for device self-debugging.

[0093] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A high-voltage electrostatic dust removal control system, characterized in that: It includes an intermediate frequency control board, a control cabinet panel and external equipment, and is characterized by: The intermediate frequency control board includes: Terminals I1S and GND are used to connect ammeter A1 to display the primary current; Terminals I2S and GND are connected to ammeter A2 for secondary current display; Terminals U and V are used to connect voltmeter V1 for primary voltage display; Terminals V2S and GND are used to connect the voltmeter V2 to display the secondary voltage; The control cabinet panel includes, Terminals I21 and GND are for secondary current sampling input 0-10V; Terminals V21 and GND secondary voltage sampling input -10-0V; Terminals IDS and GND output voltage setting input 4-20MA; Terminals TBYQ, GND transformer oil temperature input 4-20MA; Terminals DSI and GND secondary current output 0-10V; Terminals DSV and GND secondary voltage output 0-10V; Terminals RS485+ and RS485- are used for host computer communication; Terminal REV is used to output the operating status of the control panel module; Terminal RES is used to output the effective status of IPC operation control of the control panel module; Terminal SW is used for IPC start-up blocking output of control panel module; Terminal FAL, used for fault output of control panel module; Terminal RUN is used to input the start command of the control panel module; Terminal F / R, used for DCS start permission of control panel module; Terminal FRE, used for control panel module’s given switching UI; Terminal RST is used for disconnection detection of the control panel module; Terminal SAK, used for safety interlock of control panel module; Terminal ZD is used for vibration and hammering of the dust collecting plate of the control panel module; Terminal T85 is used for the switch input of the control panel module when the transformer oil temperature exceeds 85 degrees; Terminal CO is used for carbon monoxide alarm of control panel module; The external device includes: A transformer for stepping up the primary output voltage given at terminal IDS; Damper, used to prevent resonance in the output circuit and protect the rectifier transformer; High-voltage isolating switch, used to isolate voltage when repairing external equipment; The electric field air duct is used to ionize the electric charge so that it is adsorbed on the dust entering the air duct and collected by the dust collecting plates.

2. A high-voltage electrostatic dust removal control system according to claim 1, characterized in that: The control cabinet panel also includes an auxiliary power supply terminal for connecting an external 24V backup power supply to power itself.

3. A high-voltage electrostatic dust removal control system according to claim 1, characterized in that: The power supply terminals R / S / T of the intermediate frequency control board are externally connected to a three-phase AC 50Hz, rated voltage 380V power supply, and the load terminals U / V are electrically connected to the low-voltage side of the transformer in the external device.

4. A high-voltage electrostatic dust removal control system according to claim 1, characterized in that: The control cabinet panel terminal I21 / V21 / GND is electrically connected to the high voltage side of the transformer.

5. A high-voltage electrostatic dust removal control system according to claim 1, characterized in that: The transformer, damping resistor, isolating switch and dust collecting electrode are electrically connected in sequence.

Images