Detection system for blowing state of dust remover

Abstract

The invention discloses a dust remover injection state detection system. An existing bag-type dust collector does not have a function of detecting a blowing state and cannot send out a corresponding fault signal, so that an operator cannot find environmental protection hidden dangers caused by dust clogging of a bag at the first time. Each ash silo is provided with a bag type dust collector, an ash cleaning system is arranged in each bag type dust collector, the ash cleaning system is connected with a filter bag, the ash cleaning system comprises a pulse electromagnetic valve, one end of the pulse electromagnetic valve is connected with an electromagnetic pulse control valve, an air inlet is connected with an air bag, an air outlet is connected with a blowing pipe, and the pulse control valve is connected with a pulse controller. The pulse controller is connected with the relay in parallel through the first channel, one end of the relay is connected with the delay disconnection monitoring module, and the output end of the delay disconnection monitoring module is connected into the soot blowing system IO channel. The device is used for detecting the blowing state of the dust remover.

Description

Technical Field

[0001] The invention relates to a dust collector blowing state detection system. Technical Background

[0002] The thermal power company has an ash storage, which includes coarse ash storage and fine ash storage. The ash storage uses compressed air to spray and clean the ash through the bag dust collector. When the pulse controller fails or the power fails on site, the bag dust collector will lose its back-blowing function, causing the bag to be blocked by ash, causing the negative pressure inside the ash storage to disappear and gradually return to a positive pressure state, thereby causing ash to leak and pollute the environment. The existing bag dust collector does not have the function of detecting the spraying state, nor can it send out the corresponding fault signal, resulting in the operator being unable to immediately discover the environmental hazards caused by the bag blocking the ash. In order to facilitate operator monitoring and improve equipment reliability, a dust collector ash spraying state detection system needs to be designed.

[0003] In summary, a dust collector blowing state detection system is needed to solve the above problems. Summary of the invention

[0004] The purpose of the invention is to solve the problem that the bag dust collector has no function of detecting the blowing state and cannot send out the corresponding fault signal, and provides a dust collector blowing state detection system.

[0005] To solve the above-mentioned shortcomings, the present invention adopts the following technical solutions: A dust collector blowing state detection system, which comprises a coarse ash bin A, a coarse ash bin B and a fine ash bin, each of which is respectively equipped with a bag dust collector, each of which is provided with a dust cleaning system, and the dust cleaning system is connected to a filter bag; The dust cleaning system comprises a pulse valve, one end of which is connected to an electromagnetic pulse control valve, and the air inlet is connected to an air bag, the air outlet is connected to a blowpipe, and the pulse control valve is connected to a pulse controller.

[0006] The multiple pulse controllers are connected in parallel with a relay through the first channel, the output end of the relay is connected to the delayed disconnection monitoring module, and the output end of the delayed disconnection monitoring module is connected to the I\O channel of the sootblowing system.

[0007] In the dust removal spraying state system, the pulse valves are equipped with multiple solenoid valves, the coarse ash bin A and the coarse ash bin B are equipped with 24 solenoid valves, and the fine ash bin is equipped with 18 solenoid valves. Beneficial Effects

[0008] 1. The present invention adds a delayed disconnection monitoring module to realize pulse valve node action monitoring, and realizes that the status can be detected after the line is short-circuited or broken. When a pulse controller failure or a back-blowing solenoid valve failure occurs, the operating personnel can discover it in the first time, reducing the workload of the inspection personnel.

[0009] 2. The present invention adds corresponding logic to the auxiliary control network DCS to judge the state of the backflush pulse of the bag filter, so that the operator can monitor the operation state of the equipment and improve the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 It is a flow chart of the back-blowing pulse signal of the ash bin dust collector of the present invention.

[0011] Attached Figure 2 It is a logic diagram of the back-blowing pulse signal of the ash bin dust collector of the present invention. DETAILED DESCRIPTION

[0012] Reference Figure 1-2 A dust collector blowing state detection system, which comprises a coarse ash bin A, a coarse ash bin B and a fine ash bin, each of which is respectively equipped with a bag dust collector, each of which is provided with a dust cleaning system, and the dust cleaning system is connected to a filter bag; The dust cleaning system comprises a pulse valve, one end of which is connected to an electromagnetic pulse control valve, and the air inlet is connected to an air bag, the air outlet is connected to a blowpipe, and the pulse control valve is connected to a pulse controller.

[0013] The electromagnetic pulse control valve has the function of opening and closing the compressed air path under the control of the control system to realize pulse injection to the filter bag.

[0014] The air bag functions to make the pulse valve supply air evenly and ensure sufficient gas.

[0015] The spray pipe is a pressure-resistant pipe, and the diameter, number of openings, size of openings, and distance between the spray pipe and the filter bag opening are matched, thereby ensuring the dust cleaning effect.

[0016] The multiple pulse controllers are connected in parallel with a relay through the first channel, the output end of the relay is connected to the delayed disconnection monitoring module, and the output end of the delayed disconnection monitoring module is connected to the I\O channel of the sootblowing system.

[0017] The pulse controller is the main control device for the jet cleaning of the bag filter. Its output signal controls the electromagnetic pulse valve to perform cyclic cleaning of the filter bag, thus ensuring the processing capacity and dust collection efficiency of the dust collector.

[0018] The time delay monitoring module can monitor the pulse electromagnetic valve node action and make a screen display and alarm action.

[0019] In the dust removal spraying state system, the pulse valves are equipped with multiple solenoid valves, the coarse ash bin A and the coarse ash bin B are equipped with 24 solenoid valves, and the fine ash bin is equipped with 18 solenoid valves.

[0020] The solenoid valve controls the working state of the pulse valve under the control of the pulse controller; when the solenoid valve is powered on, the pulse valve works; when the solenoid valve is powered off, the pulse valve stops working.

[0021] Working principle: When the pulse controller of the bag dust collector fails or loses power, the bag dust collector will lose its backblowing function, causing the bags to be blocked by dust, and the negative pressure inside the ash bin disappears and gradually returns to a positive pressure state, thereby causing dust leakage. At this time, the delayed disconnection monitoring module monitors the action of the pulse solenoid valve node, and sends the bag dust collector fan status to the cleaning system. The bag dust collector backblowing pulse detection is realized through logical configuration, and the status is displayed on the auxiliary control network DCS ash bin screen, and a combined sound and light alarm is issued.

Claims

1. A dust collector blowing state detection system, which comprises a plurality of ash bins, and is characterized by: Each of the ash bins is respectively equipped with a bag dust collector, and each of the bag dust collectors is provided with a dust cleaning system, and the dust cleaning system is connected to the filter bag; The dust cleaning system comprises a pulse solenoid valve, one end of which is connected to an electromagnetic pulse control valve, and the air inlet is connected to an air bag, the air outlet is connected to a blowpipe, and the pulse control valve is connected to a pulse controller; The multiple pulse controllers are connected in parallel with a relay through the first channel, the output end of the relay is connected to the delayed disconnection monitoring module, and the output end of the delayed disconnection monitoring module is connected to the I\O channel of the sootblowing system.

2. According to claim 1, the dust collector blowing state detection system is characterized in that: The ash bins include coarse ash bin A, coarse ash bin B and fine ash bin.

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