Coke oven combustion chamber temperature adjusting system adopting blast furnace gas
By installing automatic regulating devices at the blast furnace gas and air inlets, the problem of lag in combustion chamber temperature control caused by traditional manual regulation methods has been solved, realizing automatic temperature regulation of the coke oven combustion chamber and improving production efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-03-03
AI Technical Summary
Traditional methods of manually adjusting the supply of blast furnace gas and air result in lagging temperature control in the coke oven combustion chamber, cumbersome operation, and low precision, which cannot meet the production needs of modern coke ovens.
By employing valve opening adjustment devices and tuyer area adjustment devices, and through pneumatic actuators and positioners, the flow rates of blast furnace gas and air are automatically adjusted to achieve automatic control of combustion chamber temperature.
It enables automatic temperature regulation of the coke oven combustion chamber, improves heating uniformity, reduces oven shut-in time, enhances coke quality and production safety, and extends the service life of the coke oven.
Smart Images
Figure CN223963446U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coke oven coking technology, and in particular to a coke oven combustion chamber temperature control system using blast furnace gas. Background Technology
[0002] Single-chamber coke ovens (using only a single type of gas as fuel) include coke ovens using coke oven gas and coke ovens using blast furnace gas. Among them, coke ovens using blast furnace gas have lower overall costs and are suitable for large-scale integrated steel enterprises.
[0003] The combustion chamber temperature of a coke oven is a crucial factor determining coke quality, yield, and the oven's lifespan. Combustion chamber temperature control is achieved by adjusting the fuel supply; for coke ovens using blast furnace gas, this means adjusting the supply of blast furnace gas and air. Traditionally, the fuel supply is determined by calculation or production experience. Then, the blast furnace gas inflow into the gas branch pipe is adjusted by changing orifice plates of different diameters (manual operation). Simultaneously, the air inlet area is adjusted by adding or removing baffles at the negative-pressure air inlet box (manual operation), thereby regulating the air inflow. This manual adjustment method relies on past production experience, leading to lag in adjustment. It is not only cumbersome and wasteful of manpower and time, but also lacks precision, resulting in poor temperature control in the coke oven combustion chamber and failing to meet the needs of current coke oven production. Summary of the Invention
[0004] This utility model provides a coke oven combustion chamber temperature control system using blast furnace gas. By installing a valve opening adjustment device on the plug valve of the blast furnace gas branch pipe, the flow rate of blast furnace gas entering the combustion chamber is automatically adjusted; by installing a tuyer area adjustment device at the air inlet of the air inlet box, the flow rate of air entering the combustion chamber is automatically adjusted; the combination of the two achieves the purpose of automatic temperature control of the coke oven combustion chamber.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A coke oven combustion chamber temperature control system using blast furnace gas comprises a blast furnace gas supply system and an air supply system. The blast furnace gas supply system includes a main blast furnace gas pipeline, branch blast furnace gas pipelines, and a stopcock valve installed on the branch blast furnace gas pipelines. The air supply system includes an air inlet box and an air pipeline. The stopcock valve is equipped with a valve opening adjustment device, and the air inlet of the air inlet box is equipped with a tuyere area adjustment device. The valve opening adjustment device and the tuyere area adjustment device are respectively connected to the coke oven heating control system.
[0007] The valve opening adjustment device consists of a pneumatic actuator and a positioner. The pneumatic actuator is installed on one side of the plug valve via a connecting bracket and is connected to the valve stem of the plug valve to drive the valve plate. The positioner is located on the pneumatic actuator and is interlocked with the pneumatic actuator. The positioner is connected to the coke oven heating control system via a signal cable.
[0008] The air inlet area adjustment device consists of a positioning bracket, a pneumatic gate, and a second positioner; the air inlet of the air inlet box is rotatably covered with a box cover; the pneumatic gate is installed on the positioning bracket, and the air inlet is blocked by the movement of the gate plate in the pneumatic gate, thereby changing the air inlet area; the second positioner is set on the positioning bracket, and the second positioner is connected to the coke oven heating control system through a signal cable.
[0009] The pneumatic gate consists of a gate body, a gate plate, and cylinders. The gate body is mounted on a positioning bracket, and slides are provided on both sides of the gate body. The gate plate is located inside the gate body and can move along the slides. Cylinders are provided on both sides of the bottom of the gate plate, and the two cylinders move synchronously to drive the gate plate to move.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] 1) By installing a valve opening adjustment device on the plug valve of the blast furnace gas branch pipe, the flow rate of blast furnace gas entering the combustion chamber is automatically adjusted; by installing a tuyer area adjustment device at the air inlet of the air inlet box, the flow rate of air entering the combustion chamber is automatically adjusted; the combination of the two achieves the purpose of automatic temperature control of the coke oven combustion chamber.
[0012] 2) Automatic adjustment of combustion chamber temperature can be achieved without manual operation, saving labor and greatly improving the degree of automation;
[0013] 3) It solves the problems of long adjustment intervals, adjustment lag, and low temperature control accuracy in manual adjustment methods;
[0014] 4) Significantly improved the uniformity of coke oven heating, reduced the oven temperature during the simmering time, and improved coke quality;
[0015] 5) Real-time control avoids the frequent occurrence of excessively high temperatures during coke oven production, which not only helps to save energy and reduce consumption and reduce the generation of nitrogen oxides, but also improves the safety of coke oven production and extends the service life of the coke oven.
[0016] 6) It is applicable not only to newly built coke ovens, but also to the upgrading and transformation of existing coke oven systems, and is easy to implement. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the installation structure of the valve opening adjustment device described in this utility model.
[0018] Figure 2 This is a schematic diagram of the installation structure of the air vent area adjustment device described in this utility model.
[0019] In the diagram: 1. Blast furnace gas branch pipe; 2. Plug valve; 3. Connecting bracket; 4. Pneumatic actuator; 5. Positioner 1; 6. (Positioner 1) Signal cable; 7. (Pneumatic actuator) Air supply pipe; 8. Air inlet box; 9. Air inlet; 10. Box cover; 11. Positioning bracket; 12. Pneumatic gate; 13. Positioner 2; 14. (Positioner 2) Signal cable; 15. (Cylinder) Air supply pipe. Detailed Implementation
[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:
[0021] like Figure 1 , Figure 2 As shown, the coke oven combustion chamber temperature control system using blast furnace gas of this utility model consists of a blast furnace gas supply system and an air supply system. The blast furnace gas supply system includes a main blast furnace gas pipeline, a branch blast furnace gas pipeline 1, and a stopcock valve 2 installed on the branch blast furnace gas pipeline 1. The air supply system includes an air inlet box 8 and an air pipeline. The stopcock valve 2 is equipped with a valve opening adjustment device, and the air inlet 9 of the air inlet box 8 is equipped with a tuyere area adjustment device. The valve opening adjustment device and the tuyere area adjustment device are respectively connected to the coke oven heating control system.
[0022] The valve opening adjustment device consists of a pneumatic actuator 4 and a positioner 5. The pneumatic actuator 4 is installed on one side of the plug valve 2 via a connecting bracket 3. The pneumatic actuator 4 is connected to the valve stem of the plug valve 2 to drive the valve plate. The positioner 5 is located on the pneumatic actuator 4 and is interlocked with the pneumatic actuator 4. The positioner 5 is connected to the coke oven heating control system via a signal cable 6.
[0023] The air inlet area adjustment device consists of a positioning bracket 11, a pneumatic gate 12, and a second positioner 13; the air inlet air box 8 has a rotatable air box cover 10 at the air inlet 9; the pneumatic gate 12 is installed on the positioning bracket 11, and the air inlet 9 is blocked by the movement of the gate plate in the pneumatic gate 12, thereby changing the air inlet area of the air inlet 9; the second positioner 13 is set on the positioning bracket 11, and the second positioner 13 is connected to the coke oven heating control system through a signal cable 14.
[0024] The pneumatic gate 12 consists of a gate body, a gate plate, and a cylinder. The gate body is mounted on a positioning bracket 11, and slides are provided on both sides of the gate body. The gate plate is located inside the gate body and can move along the slides. Cylinders are provided on both sides of the bottom of the gate plate, and the two cylinders move synchronously to drive the gate plate to move.
[0025] This utility model discloses an automatic temperature control system for a coke oven combustion chamber using blast furnace gas, comprising an automatic blast furnace gas flow rate regulation section and an automatic air flow rate regulation section. The automatic blast furnace gas flow rate regulation section includes: a pneumatic actuator 4, a connecting bracket 3, and a positioner 5, relating to the blast furnace gas branch pipe 1 and its stop valve 2 in the coke oven heating system (if it is an upgrade of existing equipment, the pneumatic actuator can be installed on the existing manual increase / decrease stop valve). The automatic air flow rate regulation section includes: a pneumatic gate 12, a positioning bracket 11, and a positioner 2 13, relating to the air inlet bellows 8 in the coke oven heating system.
[0026] The coke oven combustion chamber temperature control system using blast furnace gas consists of a blast furnace gas supply system and an air supply system. The blast furnace gas supply system typically includes a main blast furnace gas pipeline and branch pipelines. The main blast furnace gas pipeline connects to the gas inlets of each combustion chamber via multiple branch pipelines, and each branch pipeline is equipped with a stopcock valve. The air supply system includes an air inlet bellows and air ducts. One end of the air duct is connected to the external atmosphere via the air inlet bellows, and the other end is connected to the air inlet of each combustion chamber.
[0027] In the coke oven combustion chamber temperature control system using blast furnace gas described in this utility model, a valve opening adjustment device is installed on the stopcock valve 2 of the blast furnace gas branch pipe 1 to regulate the flow rate of blast furnace gas entering each combustion chamber. A pneumatic actuator 4 is mounted on one side of the stopcock valve 2 via a connecting bracket 3. A positioner 5 is mounted on the pneumatic actuator 4. The air source interface of the pneumatic actuator 4 is connected to a compressed air source via an air source pipe 7. The positioner 5 is connected to the coke oven heating control system via a signal cable 6.
[0028] In the coke oven combustion chamber temperature control system using blast furnace gas described in this utility model, an air inlet area adjustment device is installed at the air inlet 9 of the air inlet box 8 to adjust the air flow rate entering each combustion chamber. A pneumatic gate 12 is installed below the air inlet 9 of the air inlet box 8 via a positioning bracket 11, with the installation angle of the pneumatic gate 12 matching the slope of the air inlet 9. A second positioner 13 is installed on the pneumatic gate 12. The gate plate of the pneumatic gate 12 is driven by a cylinder, and the air source interface of the cylinder is connected to a compressed air source via an air source pipe 15. The second positioner 13 is connected to the coke oven heating control system via a signal cable 14.
[0029] The positioner 5 and positioner 13 described in this utility model are both pneumatic valve positioners. They receive the output signal from the coke oven heating control system and then output the signal to control the pneumatic actuator (pneumatic actuator and cylinder) to move. When the pneumatic actuator moves, the displacement of the valve plate or gate can be fed back to the pneumatic valve positioner, which then transmits the position signal of the valve plate or gate to the coke oven heating control system.
[0030] The working principle of the coke oven combustion chamber temperature control system using blast furnace gas described in this utility model is as follows:
[0031] The pneumatic actuator 4 is installed on the stopcock valve 2 of the blast furnace gas branch pipe 1. Powered by compressed air supplied by the gas source pipe 7, it drives the valve plate of the stopcock valve 2 to open or close, or adjust the opening degree. The coke oven heating control system sends a command signal to the positioner 5 via the signal cable 6 based on the real-time temperature data of the combustion chamber vertical flue, controlling the pneumatic actuator 4 to adjust the opening degree of the stopcock valve 2, thereby achieving the purpose of automatically adjusting the flow rate of blast furnace gas entering the corresponding combustion chamber vertical flue.
[0032] A pneumatic gate 12 is installed on a positioning bracket 11 below the air inlet box 8. The installation angle of the pneumatic gate 12 is consistent with the slope of the air inlet 9, so that the gate plate in the pneumatic gate 12 can block the air inlet 9 and change the inlet area after it extends. Compressed air supplied by the air source pipeline 15 serves as power, driving the gate plate to extend and retract via a cylinder. The coke oven heating control system sends a command signal to the positioner 13 via the signal cable 14 based on the real-time temperature data of the combustion chamber vertical flue, controlling the pneumatic gate 12 to adjust the opening of the air inlet 9, thereby achieving the purpose of automatically adjusting the air flow rate entering the corresponding combustion chamber vertical flue.
[0033] The bellows cover is opened and closed periodically according to the coke oven production operation. The opening of the air inlet 9 is controlled by the pneumatic gate 12. When it is necessary to close the bellows cover 10, the gate of the pneumatic gate 12 retracts without affecting its normal closing.
[0034] By installing a valve opening adjustment device on the plug valve of the blast furnace gas branch pipe, the flow rate of blast furnace gas entering the combustion chamber is automatically adjusted; by installing a tuyer area adjustment device at the air inlet of the air inlet box, the flow rate of air entering the combustion chamber is automatically adjusted; the combination of the two achieves the purpose of automatic temperature control of the coke oven combustion chamber.
[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A coke oven combustion chamber temperature control system using blast furnace gas, comprising a blast furnace gas supply system and an air supply system; the blast furnace gas supply system includes a main blast furnace gas pipeline, branch blast furnace gas pipelines, and stopcock valves installed on the branch blast furnace gas pipelines; the air supply system includes an air inlet bellows and an air pipeline; characterized in that, The plug valve is equipped with a valve opening adjustment device, and the air inlet of the air inlet box is equipped with an air outlet area adjustment device; the valve opening adjustment device and the air outlet area adjustment device are respectively connected to the coke oven heating control system.
2. The temperature control system for a coke oven combustion chamber using blast furnace gas according to claim 1, characterized in that, The valve opening adjustment device consists of a pneumatic actuator and a positioner. The pneumatic actuator is installed on one side of the plug valve via a connecting bracket and is connected to the valve stem of the plug valve to drive the valve plate. The positioner is located on the pneumatic actuator and is interlocked with the pneumatic actuator. The positioner is connected to the coke oven heating control system via a signal cable.
3. The coke oven combustion chamber temperature control system using blast furnace gas according to claim 1, characterized in that, The air inlet area adjustment device consists of a positioning bracket, a pneumatic gate, and a second positioner; the air inlet of the air inlet box is rotatably covered with a box cover; the pneumatic gate is installed on the positioning bracket, and the air inlet is blocked by the movement of the gate plate in the pneumatic gate, thereby changing the air inlet area; the second positioner is set on the positioning bracket, and the second positioner is connected to the coke oven heating control system through a signal cable.
4. A coke oven combustion chamber temperature control system using blast furnace gas according to claim 3, characterized in that, The pneumatic gate consists of a gate body, a gate plate, and cylinders. The gate body is mounted on a positioning bracket, and slides are provided on both sides of the gate body. The gate plate is located inside the gate body and can move along the slides. Cylinders are provided on both sides of the bottom of the gate plate, and the two cylinders move synchronously to drive the gate plate to move.