Intelligent automatic control device for torch combustion

Abstract

The utility model relates to an intelligent automatic control device for torch combustion, which comprises an air blower, an electromagnetic valve group, an electric butterfly valve, an ignition transformer, a pressure detector, a flame detector and an electric control box, the air blower provides air required by torch combustion, the electric butterfly valve controls the on-off of fuel gas of a torch main pipeline, the electromagnetic valve group controls the on-off of fuel gas of a torch branch pipeline, and the ignition transformer is connected with the pressure detector. Three pressure detectors are arranged on a gas main pipeline, when the gas pressure rises to 2 KPa, an electromagnetic valve of one branch is automatically opened, a torch enters a to-be-started state, when the pressure rises to 3 KPa, an ignition transformer is automatically started, first-stage ignition of the torch is started, when the pressure rises to 5 KPa, an electromagnetic valve of the other branch is automatically opened, second-stage ignition of the torch is started, and second-stage ignition of the torch is started. And the flame cannot be detected when the gas pressure is reduced to be below 2KPa or the flame detector cannot detect the flame within 5S.

Description

Technical Field

[0001] The device relates to an intelligent automatic control device for torch combustion. Background Art

[0002] Traditional flares are direct-burning, and the combustion process cannot be monitored and controlled in real time. Therefore, the problem of insufficient combustion of combustible gas often occurs, which causes atmospheric pollution on the one hand, and on the other hand, due to its poor controllability, it cannot be automatically and continuously controlled and operated, wasting a lot of manpower and material resources. Based on this, a simulation experiment was conducted on the flare combustion process, and a new type of intelligent automatic control device for flare combustion was designed, which fundamentally solves this problem. It has the characteristics of full automatic control and two-stage automatic ignition, and also has interlocking gas cut-off protection functions such as ignition failure and insufficient gas pressure, and realizes unmanned operation throughout the process. Summary of the invention

[0003] The equipment relates to an intelligent automatic control device for torch combustion, which consists of a blower, a solenoid valve group, an electric butterfly valve, an ignition transformer, a pressure detector, a flame detector and an electrical control box. The blower provides air required for torch combustion, the electric butterfly valve controls the on-off of the gas in the main pipeline of the torch, the solenoid valve group controls the on-off of the gas in the branch of the torch, and 3 pressure detectors are arranged on the main gas pipeline. When the gas pressure rises to 2KPa, a solenoid valve in one branch opens automatically, and the torch enters a waiting state. When the pressure rises to 3KPa, the ignition transformer starts automatically, and the first-level ignition of the torch starts. When the pressure rises to 5KPa, the other branch solenoid valve opens automatically, and the second-level ignition of the torch starts. When the gas pressure drops below 2KPa or the flame detector cannot detect the flame within 5S, the electric butterfly valve closes automatically, and the ignition transformer stops working automatically after successful ignition for 20S.

[0004] This equipment relates to an intelligent automatic control device for torch combustion. A time relay is arranged in the electrical control box. When the gas supply pressure rises to 5KPa, the timer starts counting. If it remains at or above 5KPa within 5S, the solenoid valve of another branch will be opened automatically. This is mainly to prevent the frequent start and stop of the secondary ignition caused by unstable gas supply pressure, and the jitter of the flame from time to time. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 Schematic diagram of the layout of each device in this intelligent control device

[0006] In the figure: 1. Branch solenoid valve EV1; 2. Branch solenoid valve EV2; 3. Pressure detector SV1; 4. Pressure detector SV2; 5. Pressure detector SV3; 6. Electric butterfly valve MV; 7. Blower; 8. Ignition electrode; 9. Flame detector FAD.

[0007] Figure 2 Schematic diagram of electrical control box principle. DETAILED DESCRIPTION

[0008] The equipment relates to an intelligent control device for torch combustion. On the gas supply main line of the torch, an electric butterfly valve MV 6, a pressure detector SV3 5, a pressure detector SV2 4, a pressure detector SV2 3, a solenoid valve EV2 2, and a solenoid valve EV1 1 are installed in sequence. The electric butterfly valve MV controls the on-off of the gas main line. The pressure detectors SV1, SV2, and SV3 respectively detect the three pressure alarm values ​​of 2KPa, 3KPa, and 5KPa of the gas main line. The solenoid valves EV1 and EV2 respectively realize the primary and secondary ignition functions. The blower 7 is installed at the bottom of the torch to provide air for combustion. The ignition electrode 8 is installed at the gas outlet of the torch to provide a gas fire source. The flame detector FAD 9 is installed at the top of the torch to detect the flame state in real time. Once the flame cannot be detected within 5S, a signal is immediately sent to the electrical control box to automatically close the electric valve MV 6 to cut off the gas, and the torch is extinguished to ensure safety.

[0009] The electrical control box has an external dimension of 400mm×500mm, and its shell is made of carbon steel. It contains a series of electrical components: air switch, ignition switch, AC contactor, thermal relay, fuse, start button, stop button, intermediate relay, time relay, operation indicator light, fault indicator light. The flame detector signal and pressure detector signal are sent to the electrical control box via the signal cable. The electrical control box automatically processes these signals and sends the processing results to external equipment, such as blower, solenoid valve, electric butterfly valve, ignition electrode, to drive the equipment to complete a series of tasks as required.

[0010] The ignition transformer is composed of an ignition switch TR and an ignition electrode 8. The ignition switch is installed in the electrical control box, and the ignition electrode is installed at the torch gas outlet.

Claims

1. An intelligent automatic control device for torch combustion, characterized in that It consists of a blower, a solenoid valve group, an electric butterfly valve, an ignition transformer, a pressure detector, a flame detector and an electrical control box. The blower provides the air required for the torch combustion. The electric butterfly valve controls the on-off of the gas in the main pipeline of the torch. The solenoid valve group controls the on-off of the gas in the branch of the torch. There are 3 pressure detectors on the main gas pipeline. When the gas pressure rises to 2KPa, a solenoid valve in one branch opens automatically, and the torch enters the standby state. When the pressure rises to 3KPa, the ignition transformer starts automatically, and the first-level ignition of the torch starts. When the pressure rises to 5KPa, the other branch solenoid valve opens automatically, and the second-level ignition of the torch starts. When the gas pressure drops below 2KPa or the flame detector cannot detect the flame within 5S, the electric butterfly valve closes automatically. After successful ignition for 20S, the ignition transformer stops working automatically.

2. The intelligent automatic control device for torch combustion according to claim 1 is characterized in that The external dimensions of the electrical control box are 400mm×500mm, and the shell is made of carbon steel. It contains a series of electrical components: air switch, ignition switch, AC contactor, thermal relay, fuse, start button, stop button, intermediate relay, time relay, operation indicator light, fault indicator light, and the flame detector signal and pressure detector signal are sent to the electrical control box via the signal cable. The electrical control box automatically processes these signals and sends the processing results to external equipment, such as blowers, solenoid valves, electric butterfly valves, and ignition electrodes, to drive the equipment to complete a series of tasks as required.

3. The intelligent automatic control device for torch combustion according to claim 1 is characterized in that It consists of an ignition transformer, an ignition switch and an ignition electrode. The ignition switch is installed in the electrical control box and the ignition electrode is installed at the torch gas outlet.

4. The intelligent automatic control device for torch combustion according to claim 1 is characterized in that The pressure detector is set with three pressure alarm values ​​of 2KPa, 3KPa and 5KPa respectively.

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