RU81562U1 - TORCH CONTROL DEVICE - Google Patents

Abstract

The torch control device comprises a combustion chamber 1, the output end of which is equipped with a nozzle 2, an impulse tube 3 connected to the fuel supply pipe 4, a differential pressure switch 5, an ignition mixture supply pipe 6 with an electric light 7 and a pipe with an oblique cut 8, which is a continuation of the pipeline 6 of the ignition mixture and located inside the combustion chamber 1.

The proposed utility model solves the problem of increasing the range of the device for fuel pressure.

Description

The inventive utility model relates to flame control devices in installations for burning emergency, continuous and periodic emissions of combustible gases and can be used in oil and gas, chemical and other industries.

A device containing a combustion chamber, a pulse tube connected to a combustion chamber, a differential pressure switch, a fuel supply pipe is known.

Fuel enters the combustion chamber and is ignited. The volume of combustion products increases several times, and the pressure in the combustion chamber increases. Excessive pressure from the combustion chamber is transmitted through a pulse tube to a differential pressure switch. When the torch goes out, the pressure in the combustion chamber decreases, and the differential pressure switch gives a signal about the end of the torch (USSR author's certificate No. 254706 class. F23N 5/4).

However, this device is unreliable due to the small signal size. This is because the increase in pressure in the combustion chamber is due to an increase in the rate of gas outflow from the combustion chamber due to an increase in the volume of gas during combustion, and the outflow rate is relatively low. In addition, it turns out a large length of a thin pulse tube from the combustion chamber to the automation units located in the safe zone - 60-100 m or more. Leakage or plugging of the impulse tube with condensate leads to a sharp decrease in the signal.

This drawback is eliminated in a device containing a combustion chamber equipped with an outlet nozzle, an impulse tube connected to the fuel supply pipe, a differential pressure switch and an ignition mixture supply pipe with electric light (patent RU 56561 U1 IPC F23N 5/24).

The device operates as follows.

Fuel through the pipeline enters the combustion chamber and is ignited by the ignition mixture from the pipeline of the ignition mixture, in which the mixture is ignited by an electric candle. Due to the presence of a nozzle at the outlet of the combustion chamber, there is a greater increase in pressure in the combustion chamber, which depends on the diameter of the nozzle. Selecting the diameter of the nozzle, you can get the required signal size.

The disadvantage of this device is the narrow range of its work on the pressure of the fuel mixture.

The proposed utility model solves the problem of expanding the range of work on the pressure of the fuel mixture for the flame control device.

To achieve this goal, the torch control device contains, as well as the closest known to it, a combustion chamber, the output end of which is equipped with a nozzle, an impulse tube connected to the fuel supply pipe, a differential pressure switch, an ignition mixture supply pipe with an electric light.

In contrast to the well-known inside the combustion chamber, a pipe with an oblique cut is installed, which is a continuation of the pipeline of the ignition mixture.

The drawing shows a device for controlling the torch.

The device comprises a combustion chamber 1, the output end of which is equipped with a nozzle 2, a pulse tube 3 connected to the fuel supply pipe 4, a differential pressure switch 5, an ignition mixture supply pipe 6 with an electric light 7 and an oblique cut pipe 8, which is a continuation of the ignition mixture pipeline 6 and located inside the combustion chamber 1.

The principle of operation is as follows.

Fuel through the pipeline 4 enters the combustion chamber 1 and is ignited by the ignition mixture from the pipeline 6. The ignition mixture is ignited by an electric candle 7. As a result of the increase in the volume of combustion products, the pressure in the combustion chamber 1 increases. Excessive pressure through the impulse tube 3 is transmitted to the differential pressure switch 5 and a signal about the presence of a flame appears. When the flame goes out, the pressure in the combustion chamber 1 decreases, and the differential pressure switch 5 detects its extinction.

Selecting the diameter of the nozzle 2, you can set the desired signal value. The pipe 8 with an oblique cut, together with the gas flowing out of the ignition mixture, forms a combustion stabilizer, the presence of which in the combustion chamber 1 allowed to expand the range of the combustion chamber by 3 ... 5 times.

Claims (1)

A torch control device comprising a combustion chamber, the output end of which is provided with a nozzle, an impulse tube connected to a fuel supply pipe, a differential pressure switch, an ignition mixture supply pipe with electric light, characterized in that a pipe with an oblique cut is installed inside the combustion chamber, which is a continuation pipeline ignition mixture.