Automatic ignition control system for coke oven gas release point

Abstract

The utility model relates to a coke oven collecting pipe raw coal gas automatic diffusion ignition control system, including the collecting pipe, the lateral wall of collecting pipe is connected with the diffusion pipe, its characterized in that, the diffusion pipe is equipped with torch burner away from the one end of collecting pipe, be equipped with the first igniter at torch burner, the first igniter is connected with the controller, the collecting pipe is equipped with a plurality of pressure transmitter for detecting the gas pressure in collecting pipe along the length direction of collecting pipe, the controller is connected with pressure transmitter. The utility model sets up a plurality of pressure transmitter to detect the gas pressure at a plurality of positions in collecting pipe, ensure the accuracy of detection, effectively prevent the misoperation of controller control caused by the pressure fluctuation in collecting pipe, influence the diffusion of raw coal gas, set up the flame detector to monitor the flame of torch burner, ensure ignition success, prevent ignition failure, simple structure, convenient mode of use.

Description

Technical Field

[0001] This utility model belongs to the technical field of coke oven equipment and relates to an automatic ignition control system for raw coal gas in the coke oven gas collecting pipe. Background Technology

[0002] Coke oven coking processes generate a large amount of raw coal gas, which has a complex composition, mainly containing harmful substances such as tar, sulfides, cyanides, ammonia, and hydrocarbons. Among these, polycyclic aromatic hydrocarbons, represented by benzo[a]pyrene, are highly carcinogenic. The leakage of raw coal gas from coke ovens is a major source of pollution in the coking production process. During coking operations, malfunctions in the gas blowing system or sudden increases in gas collecting pipe pressure that endanger production safety can cause smoke and fire to escape from the coke oven doors, charging holes, riser pipes, and related interfaces, severely affecting the service life of coke oven components. When the pressure exceeds the limit, the vent valve installed on the gas collecting pipe needs to automatically open for venting and ignition. The reliable operation of the automatic venting and ignition device is not only a guarantee of furnace safety but also a requirement for meeting environmental protection emission standards. Therefore, how to reliably detect the pressure in the coke oven gas collecting pipe and achieve automatic venting and ignition of raw coal gas in the coke oven gas collecting pipe is a significant challenge currently facing engineering applications.

[0003] In domestic coke oven gas collection pipe automatic venting and ignition control systems, the conventional setting for gas collection pipe pressure measurement is generally single-point pressure measurement. The main problems with this conventional method are: Using a single-point coke oven gas collection pipe pressure measurement system, only one measuring point is taken on the entire gas collection pipe section to represent the pressure of the entire pipe. Automatic adjustment of the gas collection pipe is then achieved through regulating valves based on this. When the coke oven is undergoing coke pushing and coal charging operations in different oven holes, or when the coke oven is in different coking stages, the pressure value at the single-point pressure measuring point fluctuates due to differences in gas production. This can easily cause malfunctions in the automatic venting and ignition control system. Furthermore, when using a single-point coke oven gas collection pipe pressure measurement system, blockages in the pressure tapping port or sampling pipeline, or faults in the signal lines, inaccurate detection can lead to operator misjudgments. This can result in failure to ignite promptly after the venting tower is shut down, causing the coke oven gas to be directly discharged into the atmosphere, severely polluting the environment. Utility Model Content

[0004] The purpose of this invention is to provide an automatic ignition control system for raw coal gas in coke oven gas collecting pipes, addressing the problems existing in the prior art.

[0005] Therefore, the present invention adopts the following technical solution:

[0006] An automatic venting and ignition control system for raw coal gas in a coke oven gas collecting pipe includes a gas collecting pipe, a venting pipe connected to the side wall of the gas collecting pipe, a flare burner located at the end of the venting pipe away from the gas collecting pipe, a first igniter located at the flare burner, a controller connected to the first igniter, and multiple pressure transmitters for detecting the gas pressure inside the gas collecting pipe located along the length of the gas collecting pipe, with the controller connected to the pressure transmitters.

[0007] Furthermore, there are three pressure transmitters.

[0008] Furthermore, an electromagnetic flap valve is provided in the middle of the venting pipe, and the electromagnetic flap valve is connected to the controller.

[0009] Furthermore, a windproof cover is provided at the torch burner.

[0010] Furthermore, a second igniter is provided at the torch burner, and the second igniter is connected to the controller.

[0011] Furthermore, a steam main pipe is provided on one side of the vent pipe, and the steam main pipe is connected to a first gas supply pipe and a second gas supply pipe. The first gas supply pipe is connected to the vent pipe near the flare burner, and the second gas supply pipe is connected to the top of the vent pipe. A steam extinguishing valve is provided on the first gas supply pipe, and a steam fire-gathering valve is provided on the second gas supply pipe. The controller is connected to the steam extinguishing valve and the steam fire-gathering valve respectively.

[0012] Furthermore, a flame detector is provided on one side of the torch burner, and the flame detector is connected to the controller.

[0013] The advantages of this utility model are as follows: multiple pressure transmitters are set to detect the gas pressure at multiple locations in the gas collecting pipe to ensure detection accuracy and effectively prevent controller misoperation caused by pressure fluctuations in the gas collecting pipe, which would affect the release of raw coal gas; a flame detector is set to monitor the flame of the flare burner to ensure successful ignition and prevent ignition failure; the structure is simple and the method of use is convenient. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a control principle diagram of the present invention;

[0016] In the diagram, 1-Gas collection pipe, 2-Vent pipe, 3-Flame burner, 4-First igniter, 5-Controller, 6-Second igniter, 7-Pressure transmitter, 8-Solenoid valve, 9-Wind shield, 10-Flame detector, 11-Steam main pipe, 12-First gas supply pipe, 13-Second gas supply pipe, 14-Steam extinguishing valve, 15-Steam flame extinguishing valve. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings:

[0018] like Figure 1 and 2 As shown, an automatic venting and ignition control system for raw coal gas in a coke oven gas collecting pipe includes a collecting pipe 1 connected to the coke oven. Raw coal gas in the coke oven can be discharged through the collecting pipe 1. A venting pipe 2 is connected to the side wall of the collecting pipe 1. When the gas pressure in the collecting pipe 1 is too high, it can be discharged into the venting pipe 2. A flare burner 3 is installed at the end of the venting pipe 2 away from the collecting pipe 1. The raw coal gas in the venting pipe 2 can be burned through the flare burner 3, thus preventing the raw coal gas from being directly discharged into the atmosphere and disturbing the atmospheric environment. A first igniter 4 is installed at the flare burner 3 to ignite the raw coal gas in the flare burner 3. The first igniter 4 is connected to a controller 5, which adopts a conventional DCS controller. The controller 5 can control the first igniter 4 to perform the ignition operation to ensure that the raw coal gas can be ignited. A second igniter 6 is also installed at the flare burner 3. The second igniter 6 is also connected to the controller 5. Ignition is carried out simultaneously by the first igniter 4 and the second igniter 6 to ensure that the raw coal gas is ignited. Multiple pressure transmitters 7 are installed along the length of the gas collecting pipe 1 to detect the gas pressure inside the gas collecting pipe. Specifically, three pressure transmitters 7 are installed. The three pressure transmitters 7 detect the gas pressure at multiple locations inside the gas collecting pipe 1 to ensure accurate detection results. This can effectively prevent false ignition operations caused by gas pressure fluctuations inside the gas collecting pipe 1. The controller 5 is connected to the pressure transmitters 7. When the gas pressure values ​​detected by the three pressure transmitters 7 are similar, they can be identified as the actual gas pressure inside the gas collecting pipe 1. If the gas pressure values ​​detected by the three pressure transmitters 7 differ greatly, it is considered that the pressure value inside the gas collecting pipe 1 is fluctuating.

[0019] A solenoid valve 8 is installed in the middle of the vent pipe 2. The solenoid valve 8 is connected to the controller 5. When the pressure transmitter 7 detects that the gas pressure in the gas collecting pipe 1 exceeds the threshold, the controller 5 can control the solenoid valve 8 to open, allowing the raw coal gas to enter the flare burner 3 through the vent pipe 2. The flare burner 3 is equipped with a windproof cover 9, and a flame detector 10 for detecting the combustion status of the flare burner 3 is installed on one side of the flare burner 3. The flame detector 10 is connected to the controller 5. If ignition failure occurs, it can provide timely feedback and control the igniter to re-ignite. A steam main pipe 11 is installed on one side of the vent pipe 2. Pipe 11 is connected to a first gas supply pipe 12 and a second gas supply pipe 13. The first gas supply pipe 12 is connected to the vent pipe 2 near the flare burner 3, and the second gas supply pipe 13 is connected to the top of the flare burner 3. A steam extinguishing valve 14 is provided on the first gas supply pipe 12, and a steam fire-gathering valve 15 is provided on the second gas supply pipe 13. The controller 5 is connected to the steam extinguishing valve 14 and the steam fire-gathering valve 15 respectively. When fire extinguishing is required, the controller 5 can control the steam extinguishing valve 14 to open, and the first gas supply pipe 12 can supply steam to the vent pipe 2 near the flare burner 3 for fire extinguishing. The second gas supply pipe 13 can spray steam to gather the fire.

[0020] The method of using this utility model is as follows:

[0021] When the raw coal gas from the coke oven enters the gas collecting pipe 1, three pressure transmitters 7 monitor the gas pressure in the gas collecting pipe 1 in real time. If any two of the three pressure transmitters 7 detect that the gas pressure in the gas collecting pipe 1 exceeds the threshold, it indicates that the gas pressure in the gas collecting pipe 1 is relatively high and not a temporary fluctuation. The controller 5 controls the solenoid valve 8 to open, allowing the raw coal gas to enter the flare burner 3 through the vent pipe 2. The controller 5 simultaneously controls the first igniter 4 and the second igniter 6 to ignite, causing the raw coal gas in the flare burner 3 to burn. If only one pressure transmitter 7 detects that the gas pressure in the gas collecting pipe 1 exceeds the threshold, it indicates that the gas pressure in the gas collecting pipe 1 is fluctuating, and the controller 5 does not issue a control command. When the first igniter 4 and the second igniter 6 ignite, the gas pressure in the gas collecting pipe 1 will fluctuate. After the fire, the flame detector 10 detects the flame. If no flame is detected, it indicates that the ignition has failed. The controller 5 then controls the first igniter 4 and the second igniter 6 to re-ignite. When all or any two of the three pressure transmitters 7 detect that the gas pressure in the gas collection pipe 1 is lower than the threshold, the controller 5 controls the steam extinguishing valve 14 to open and deliver steam through the first gas supply pipe 12 for fire extinguishing. At the same time, the controller controls the solenoid valve 8 to close. After the flame detector 10 detects that the flame has been extinguished, the controller 5 controls the steam extinguishing valve 14 to close to prevent steam waste. If only one pressure transmitter 7 detects that the gas pressure in the gas collection pipe 1 is lower than the threshold, it indicates that the gas pressure in the gas collection pipe 1 is fluctuating, and the controller 5 does not issue a control command.

[0022] The flame detector 10 can also detect the flame pattern of the flare burner 3 and control the steam scorching valve 15 to open for scorching operation.

Claims

1. An automatic venting and ignition control system for raw coal gas in a coke oven gas collecting pipe, comprising a gas collecting pipe (1), wherein a venting pipe (2) is connected to the side wall of the gas collecting pipe (1), characterized in that, A torch burner (3) is provided at one end of the vent pipe (2) away from the gas collecting pipe (1). A first igniter (4) is provided at the torch burner (3). The first igniter (4) is connected to a controller (5). Multiple pressure transmitters (7) for detecting the gas pressure inside the gas collecting pipe (1) are provided along the length of the gas collecting pipe (1). The controller (5) is connected to the pressure transmitters (7).

2. The automatic venting and ignition control system for raw coal gas in a coke oven gas collecting pipe according to claim 1, characterized in that, There are three pressure transmitters (7).

3. The automatic venting and ignition control system for raw coal gas in a coke oven gas collecting pipe according to claim 1, characterized in that, The middle part of the vent pipe (2) is provided with a solenoid valve (8), which is connected to the controller (5).

4. The automatic venting and ignition control system for raw coal gas in a coke oven gas collecting pipe according to claim 1, characterized in that, The torch burner (3) is equipped with a windproof cover (9).

5. The automatic venting and ignition control system for raw coal gas in a coke oven gas collecting pipe according to claim 1, characterized in that, The torch burner (3) is equipped with a second igniter (6), which is connected to the controller (5).

6. The automatic venting and ignition control system for raw coal gas in a coke oven gas collecting pipe according to claim 1, characterized in that, A steam main pipe (11) is provided on one side of the vent pipe (2). The steam main pipe (11) is connected to a first gas supply pipe (12) and a second gas supply pipe (13). The first gas supply pipe (12) is connected to the vent pipe (2) near the flare burner (3). The second gas supply pipe (13) is connected to the top of the flare burner (3). A steam extinguishing valve (14) is provided on the first gas supply pipe (12). A steam fire-gathering valve (15) is provided on the second gas supply pipe (13). The controller (5) is connected to the steam extinguishing valve (14) and the steam fire-gathering valve (15) respectively.

7. The automatic venting and ignition control system for raw coal gas in a coke oven gas collecting pipe according to claim 1, characterized in that, A flame detector (10) is provided on one side of the torch burner (3), and the flame detector (10) is connected to the controller (5).

Images