CN-224221558-U - Insulator air sealing system with adjusting plate wet electric dust collector

Abstract

The utility model relates to the technical field of dust collectors, in particular to an insulator air sealing system with an adjusting plate wet electric dust collector, which comprises a main air supply unit, a distribution module, a redundancy protection unit and a pressure closed-loop control module. The main air supply unit is used for conveying dry hot air to the main pipe through an air damper, a high-pressure centrifugal fan, an electric heater and the like, the distribution module is used for distributing the dry hot air to each insulator chamber according to the need through an air quantity adjusting plate and dynamically adjusting the air quantity according to feedback of a temperature measuring resistor, the redundancy protection unit is used for realizing seamless switching within 3 seconds through a standby pipeline, and the pressure closed loop module is used for adjusting the pressure of the main pipe in real time to be higher than the internal pressure of the dust remover. The system balances the temperature of each insulator chamber, prevents moisture penetration, improves the reliability of the system, and is suitable for high-humidity and high-voltage scenes such as thermal power, chemical industry and the like.

Inventors

• ZHU HUALEI
• CAI KEMING
• MA LIMIN
• BIAN WEIGUANG
• XU ZEYE

Assignees

• 浙江天洁环境科技股份有限公司

Dates

Publication Date

20260512

Application Date

20250523

Claims (5)

1. 1. An insulator air sealing system with an adjusting plate wet electric dust collector, which is characterized by comprising The main air supply unit consists of a throttle valve (1), a main fan (2), a sheet type check valve (3), an expansion joint (4), an electric butterfly valve (5) and an electric heater (6) which are sequentially communicated and is used for providing dry hot air; The distribution module comprises a plurality of branch pipes communicated with the main pipe of the main air supply unit, the tail ends of the branch pipes are connected with an insulator chamber (10) through an air quantity adjusting plate (9), and a temperature measuring resistor (11) is arranged in the insulator chamber (10); The redundant protection unit comprises a standby pipeline (12) connected in parallel with the main air supply unit, wherein the standby pipeline comprises a standby fan, a sheet type check valve (3), an expansion joint (4) and an electric butterfly valve (5); The pressure closed-loop control module consists of a pressure transmitter (8) and a damper (1) on the main pipe, and maintains the pressure of the main pipe to be higher than the internal pressure of the dust remover.
2. 2. Insulator air sealing system according to claim 1, characterized in that the air quantity adjusting plate (9) is provided as a replaceable perforated plate, the pore diameters being distributed in a gradient.
3. 3. Insulator air-sealing system according to claim 1, characterized in that the expansion joint (4) is of a metal-nonmetal composite structure.
4. 4. The insulator air sealing system according to claim 1, wherein the temperature measuring resistor (11) is of a PT100 type, the temperature measuring precision is +/-0.5 ℃, and the data access DCS system realizes temperature-air quantity PID closed-loop control.
5. 5. The insulator air sealing system according to claim 1, characterized in that the outlet main pressure of the electric heater (6) is fed back to the damper (1) and the main fan (2) through a pressure transmitter (8), maintaining the pressure constant at 5.2kPa and 0.3-0.5kPa higher than the dust collector pressure.

Description

Insulator air sealing system with adjusting plate wet electric dust collector Technical Field The utility model relates to the technical field of dust collectors, in particular to an insulator air sealing system with an adjusting plate wet electric dust collector. Background The wet electric dust collector is one high voltage electrostatic dust collector for treating wet gas, and is mainly used in eliminating dust, acid fog, water drop, aerosol, smell, PM 2.5 and other harmful matters from wet gas. Wet electric dust collector is usually called WESP for short, and has the same basic principle as that of dry electric dust collector, and it has three stages of charging, collecting and ash cleaning. At present, in a thermal power plant, a wet electric dust collector is widely used for purifying flue gas after wet desulfurization, the flue gas after wet desulfurization is high-pressure flue gas, meanwhile, an anode spray system is arranged in wet electricity, and the part of flue gas is easy to carry moisture due to the high-pressure effect. All insulators of the wet dust collector are arranged in an insulator chamber, a heating element and a temperature control sensor are arranged in the insulator chamber, condensation and dew condensation in the insulator chamber are avoided, and meanwhile, the phenomenon that moisture enters the inner wall of the porcelain sleeve to generate creepage is also required to be prevented. Because the positions of the insulators are different, the air inlet quantity of the air sealing system is different, and the internal temperature of part of the insulators is different. In view of this, the advent of a sealing system capable of adjusting the air volume inside the insulator chamber is necessary. Disclosure of utility model The utility model aims to provide an insulator air sealing system with an adjusting plate wet electric dust collector, which is used for solving the problems in the background technology. In order to achieve the above purpose, the present utility model provides the following technical solutions: An insulator air sealing system with an adjusting plate wet electric dust collector comprises a main air supply unit, a distribution module, a redundancy protection unit and a pressure closed-loop control module; the main air supply unit comprises a throttle valve, a main fan, a sheet type check valve, an expansion joint, an electric butterfly valve and an electric heater which are sequentially communicated; The concrete connection path comprises external air, a damper, a main fan, a sheet type check valve, an expansion joint, an electric butterfly valve, an electric heater and a main pipe, wherein the main pipe can be provided with dry hot air through the process and then is distributed backwards; the distribution module comprises a plurality of branch pipes communicated with the main pipe, the tail ends of the branch pipes are communicated with an insulator chamber through an air quantity adjusting plate, a temperature measuring resistor is arranged in the insulator chamber, and the opening and closing angles of the corresponding air quantity adjusting plates are dynamically adjusted through temperature feedback; The concrete connection path comprises a main pipe, a plurality of branch pipes, an air quantity adjusting plate and an insulator chamber; The redundant protection unit comprises a standby pipeline connected in parallel with the main air supply unit, wherein the standby pipeline also comprises a standby fan, a plate type check valve, an expansion joint and an electric butterfly valve, when the main fan fails, the standby fan is started within 3 seconds, the electric butterfly valve at the outlet of the original fan is closed, and the electric butterfly valve of the standby pipeline is opened to ensure uninterrupted air supply; The pressure closed-loop control module comprises a pressure transmitter and an on-site pressure gauge which are arranged on the main pipe, and the purpose that the pressure of the sealing system is higher than the internal pressure of the dust remover is realized by matching with the air damper; The main pipe is provided with a pressure transmitter, the signal is transmitted to the PLC/DCS, the opening degree of the air regulating door and the rotating speed of the fan are controlled, so that the pressure of the main pipe is kept constant (such as 5.2 kPa), and the pressure of a sealing system is ensured to be always higher than the internal pressure (about 0.3-0.5 kPa) of the dust remover. Compared with the prior art, the utility model has the beneficial effects that the air quantity of each insulator chamber is accurately distributed through the air quantity adjusting plate, and the temperature difference is eliminated; the redundant protection unit ensures that the system is continuously operated when the main fan is switched within 3 seconds during the fault; the pressure closed-loop control module maintains the constant pressure o