A device for regulating the supply of heated gas to the combustion chamber of a coke oven

Abstract

The utility model provides an equipment of adjusting coke oven combustion chamber heating gas supply quantity belongs to the technical field of heating control of coke oven. The equipment includes flow control valve, heating control system, exchange plug, blast furnace gas main pipe, blast furnace gas branch pipe, heat accumulation type small flue, coke oven gas main pipe, coke oven gas branch pipe, combustion chamber lower injection pipe and coke oven production management system. The flow control valve and exchange plug are arranged on blast furnace gas branch pipe and coke oven gas branch pipe respectively along the airflow direction, the heating control system is connected with all flow control valves and exchange plugs communication, and is connected with coke oven production management system communication. The heating control system is automatically adjusted gas supply quantity, improves heating uniformity, energy efficiency and production efficiency.

Description

Technical Field

[0001] This utility model relates to coke oven gas heating technology, and more particularly to a device for adjusting the supply of heating gas in the coke oven combustion chamber. Background Technology

[0002] During coke oven production, the combustion of gas in the coke oven combustion chamber generates heat, which is transferred to the coal in the carbonization chamber through the furnace wall. As the coal coking process progresses, the heat flux intensity transferred from the furnace wall to the carbonization chamber changes, and the temperature of the combustion chamber flue also changes accordingly. Coke oven heating gas is divided into blast furnace gas and coke oven gas, which are supplied to the coke oven through the main gas pipe in the coke oven basement. The blast furnace gas main pipe is located on the machine side and coke side of the coke oven basement, with the coke oven gas main pipe located in the middle. Gas branch pipes corresponding to the combustion chambers are installed on the main gas pipes. The blast furnace gas branch pipes connect the small flues of each regenerator to the blast furnace gas main pipe; the coke oven gas main pipe connects to the lower nozzle of the combustion chamber and the coke oven gas main pipe through the coke oven gas branch pipes. When the coke oven is heated by blast furnace gas, the blast furnace gas enters the rising airflow small flues, regenerators, and combustion chamber vertical flues through the branch pipes; the coke oven gas enters the rising airflow vertical flues of the combustion chamber through the branch pipes. The coke oven heating gas combustion adopts a regenerative combustion method, and the reversal cycle time between the rising and falling airflow is about 20 to 30 minutes.

[0003] Currently, the gas required for coke oven heating is supplied to each combustion chamber via a main gas pipe and branch pipes. The main gas pipe is equipped with an automatic flow control system for the heating gas, and each branch pipe is fitted with orifice plates that limit the gas flow. The gas supply to each combustion chamber is limited according to the orifice diameter. When it is necessary to change the gas supply to a combustion chamber, it is necessary to manually replace the orifice plates with different orifice diameters. This operation not only requires stopping the gas supply but is also time-consuming and labor-intensive, which severely limits the application effectiveness of automatic coke oven heating technology. Utility Model Content

[0004] The purpose of this invention is to address the problems of needing to stop the gas supply when replacing the flow restrictor plate, which is time-consuming and labor-intensive. This invention proposes a device for adjusting the supply of heating gas to the coke oven combustion chamber. This technology can adjust the amount of gas supplied to the combustion chamber by the gas branch pipe according to the temperature of the combustion chamber flue and the coking process of the coal in the adjacent carbonization chamber, thereby improving coking production efficiency and meeting the requirements of high efficiency, energy saving and environmental protection in coking production.

[0005] It should be noted that, in this utility model, unless otherwise specified, the specific meaning of "comprising" in relation to composition and description includes both open-ended meanings such as "comprising," "including," etc., and closed-ended meanings such as "composed of," "consisting of," etc., and similar meanings.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a device for regulating the supply of heating gas in the coke oven combustion chamber, including a flow limiting valve, a heating control system, an exchange valve, a blast furnace gas main pipe, a blast furnace gas branch pipe, a regenerative small flue, a coke oven gas main pipe, a coke oven gas branch pipe, and a combustion chamber lower spray pipe.

[0007] The blast furnace gas main pipe, blast furnace gas branch pipe, and regenerative small flue are connected in sequence. On the blast furnace gas branch pipe, a flow-limiting valve and an exchange valve are sequentially installed along the direction from the blast furnace gas main pipe to the regenerative small flue. The flow-limiting valve is used to regulate the gas flow rate of the blast furnace gas branch pipe, and the exchange valve is used to regulate the opening or closing of the blast furnace gas branch pipe according to the exchange time.

[0008] The main coke oven gas pipe, the branch coke oven gas pipe, and the lower combustion chamber nozzle are connected in sequence. On the branch coke oven gas pipe, a flow limiting valve and an exchange valve are installed in sequence along the direction from the main coke oven gas pipe to the lower combustion chamber nozzle. The flow limiting valve is used to regulate the gas flow rate of the branch coke oven gas pipe, and the exchange valve is used to regulate the opening or closing of the branch coke oven gas pipe according to the exchange cycle.

[0009] The heating control system is communicatively connected to the flow-limiting valves, exchange cocks, and coke oven gas branch pipes on the blast furnace gas branch pipes, respectively. The heating control system includes a blast furnace gas heating control module and a coke oven gas heating control module. The heating control modules set the blast furnace gas and coke oven gas supply amounts for each combustion chamber during different exchange periods based on information provided by the coke oven production management system, such as the carbonization chamber coal charging plan, exchange cycle, and standard flue temperature. The heating control system dynamically adjusts the gas supply amount of each combustion chamber branch pipe through the flow-limiting valves.

[0010] Furthermore, the flow-limiting valve includes a valve body, a flow-limiting orifice plate, an adjusting plate, a valve shaft, a sealing module, an actuator, and a sealing cover; the valve body is provided with a detachable flow-limiting orifice plate, the orifice plate having an opening area of ​​F1; the adjusting plate is fixedly connected to the valve shaft, the valve shaft being an L-shaped shaft, and the adjusting plate is vertically fixed to the end of the valve shaft. The adjusting plate can rotate with the valve shaft between two stop positions, 0° and 90°, and the surface size of the adjusting plate is smaller than the opening size of the flow-limiting orifice plate, the surface area of ​​the adjusting plate being F. t When the regulating plate is in the 0° stop position, its surface is parallel to the opening plane of the flow-limiting orifice plate, and the regulating plate is entirely located within the opening area of ​​the flow-limiting orifice plate. An annular airflow channel is formed between the flow-limiting orifice plate and the regulating plate, and the area of ​​the gas channel is F2 = F1 - F. t In this state, the gas flow rate through the flow limiting valve is V2 m. 3 / min, which is the lower limit flow rate of the heating gas regulation range; when the regulating plate is in the 90° stop position, its plate surface is perpendicular to the opening plane of the flow-limiting orifice plate, and the regulating plate is located outside the opening area of ​​the flow-limiting orifice plate. The opening of the flow-limiting orifice plate is not blocked by the regulating plate, and the gas passage area is the opening area F1 of the flow-limiting orifice plate. In this state, the gas flow rate through the flow-limiting valve is V1 m. 3 / min. The valve shaft passes through the valve body and then through the sealing module to connect with the actuator. The sealing cover is detachably installed on the outside of the orifice plate groove of the valve body. When the sealing cover is removed from the valve body, the flow limiting orifice plate in the valve body can be pulled out and replaced. According to the set gas flow rate V1, the flow limiting orifice plate of the corresponding specification (different opening diameter) can be selected and installed to achieve flow regulation.

[0011] Furthermore, the actuator is a pneumatic actuator.

[0012] Furthermore, the sealing module is a magnetohydrodynamic sealing module.

[0013] Furthermore, the opening of the flow-limiting orifice plate matches the outer contour of the adjusting plate, and can be of any shape, including but not limited to, the opening of the flow-limiting orifice plate being circular, and the surface of the adjusting plate being circular.

[0014] Furthermore, the sealing cap is larger than the outer contour of the flow-limiting orifice plate to ensure that the flow-limiting orifice plate can be pulled out of the valve body.

[0015] The equipment for regulating the supply of heating gas to the coke oven combustion chamber, and the method for regulating the supply of heating gas to the coke oven combustion chamber, are as follows:

[0016] a. Set the exchange period T 交换 For 20-30 minutes.

[0017] b. The heating control system sets the heating gas quantity for each combustion chamber based on information such as the coal charging plan, exchange cycle, and standard flue temperature provided by the coke oven production management system. The heating control system controls the position of the regulating plate inside the flow-limiting valve through a pneumatic actuator to regulate the gas supply to the combustion chamber during the exchange period. When the regulating plate of the flow-limiting valve is in the "90°" position, the flow-limiting valve allows the gas flow rate V1 m³ to pass through. 3 / min; When the flow restrictor valve adjustment plate is in the "0°" position, the flow restrictor valve allows gas flow rate V2m 3 / min; the time T1 during which the pneumatic control plate of the flow limiting valve is in the 0° state within the exchange cycle.

[0018] The amount of combustion chamber gas supplied during the exchange cycle is V 周。

[0019] V 周= V1*(T 交换 - T1) + V2 * T1

[0020] c. The combustion chamber gas heating control system controls the time T1 within the regulating plate of the upper flow valve of each combustion chamber to be in the "0°" position during one exchange period, based on the coking process of the adjacent carbonization chambers of each combustion chamber, so as to regulate the total gas supply within the combustion chamber exchange cycle.

[0021] This utility model relates to a device for regulating the supply of heating gas in the coke oven combustion chamber, which has the following advantages compared with the prior art:

[0022] 1) The coke oven thermal regulation methods are flexible, responsive and precise, which can significantly improve the thermal regulation efficiency and quality of the coke oven and save 3% to 4% of the coking heat consumption.

[0023] 2) It can adjust the supply of heating gas to adjacent combustion chambers according to the real-time coking process of coal in the carbonization chamber, thereby realizing the intelligent heating process of coke oven.

[0024] 3) The equipment and technical transformation scheme involved in this utility model are easy to implement on existing coke ovens that have been put into operation. The transformation is convenient and widely applicable. It is of great significance for promoting the technological upgrading of the industry and can generate significant social and economic benefits. Attached Figure Description

[0025] Figure 1 Schematic diagram of blast furnace gas branch pipe system;

[0026] Figure 2 Schematic diagram of coke oven gas branch pipe system;

[0027] Figure 3 Top view of the flow restrictor valve;

[0028] Figure 4 Front view of the flow restrictor valve;

[0029] Figure 5 for Figure 3 BB cross-sectional view of the flow limiting valve in the middle;

[0030] Figure 6 Diagram showing the relative positions of the flow-limiting orifice plate and the regulating plate when the regulating plate is at a 90° position;

[0031] Figure 7 Cross-sectional view of the flow restrictor valve (CC section);

[0032] Figure 8 Diagram showing the relative positions of the flow-limiting orifice plate and the regulating plate when the regulating plate is at the 0° position;

[0033] Figure 9 Cross-sectional view of the flow restrictor valve DD.

[0034] 1-Flow limiting valve; 11-Valve body; 12-Flow limiting orifice plate; 13-Adjusting plate; 14-Valve shaft; 15-Sealing module; 16-Actuator; 17-Sealing cover; 2-Heating control system; 3-Exchange cock. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] Example 1

[0038] This embodiment discloses a device for regulating the supply of heating gas to the coke oven combustion chamber, including a flow limiting valve 1, a heating control system 2, an exchange valve 3, a blast furnace gas main pipe, a blast furnace gas branch pipe, a regenerative small flue, a coke oven gas main pipe, a coke oven gas branch pipe, and a combustion chamber lower spray pipe.

[0039] like Figure 1 As shown, the blast furnace gas main pipe, blast furnace gas branch pipe, and regenerative small flue are connected in sequence. On the blast furnace gas branch pipe, a flow-limiting valve 1 and an exchange valve 3 are sequentially installed along the direction from the blast furnace gas main pipe to the regenerative small flue. The flow-limiting valve 1 is used to regulate the gas flow rate of the blast furnace gas branch pipe, and the exchange valve 3 is used to adjust the opening or closing of the blast furnace gas branch pipe according to the exchange cycle. In this embodiment, the exchange cycle is 30 minutes.

[0040] like Figure 2 As shown, the main coke oven gas pipe, the branch coke oven gas pipe, and the lower combustion chamber spray pipe are connected in sequence. On the branch coke oven gas pipe, a flow limiting valve 1 and an exchange valve 3 are sequentially installed along the direction from the main coke oven gas pipe to the lower combustion chamber spray pipe. The flow limiting valve 1 is used to regulate the gas flow rate of the branch coke oven gas pipe, and the exchange valve 3 is used to regulate the opening or closing of the branch coke oven gas pipe according to the exchange cycle. In this embodiment, the exchange cycle is 30 minutes.

[0041] The heating control system 2 is communicatively connected to the flow-limiting valve 1 on the blast furnace gas branch pipe, the exchange valve 3 on the blast furnace gas branch pipe, the flow-limiting valve 1 on the coke oven gas branch pipe, and the exchange valve 3 on the coke oven gas branch pipe. That is, the heating control system 2 is communicatively connected to all flow-limiting valves 1 and all exchange valves 3 in this equipment. The heating control system 2 is also communicatively connected to the coke oven production management system. The heating control system 2 includes a blast furnace gas heating control module and a coke oven gas heating control module. The heating control module can set the blast furnace gas and coke oven gas supply amounts for each combustion chamber during different exchange periods according to information provided by the coke oven production management system, such as the carbonization chamber coal charging plan, exchange cycle, and standard flue temperature. The heating control system 2 dynamically adjusts the gas supply amount of each combustion chamber gas branch pipe through the flow-limiting valve 1.

[0042] In this embodiment, as Figure 3-5 As shown, the flow-limiting valve 1 includes a valve body 11, a flow-limiting orifice plate 12, an adjusting plate 13, a valve shaft 14, a sealing module 15, an actuator 16, and a sealing cover 17. The valve body 11 contains a detachable flow-limiting orifice plate 12 with a circular opening of 135mm in diameter, meaning the opening area of ​​the orifice plate 12 is F1. The adjusting plate 13 is fixedly connected to the valve shaft 14 and can rotate around the valve shaft 14 between two stop positions: 0° and 90°. The adjusting plate 13 has only two limit states: 0° and 90°. Furthermore, the surface size of the adjusting plate 13 is smaller than the opening size of the flow-limiting orifice plate 12, and the surface shape of the adjusting plate 13 is a circle with a diameter of 60mm, meaning the surface area of ​​the adjusting plate 13 is F1. t ;like Figure 8 and Figure 9 As shown, when the regulating plate is in the 0° stop position, its surface is parallel to the opening plane of the flow-limiting orifice plate 12, and the regulating plate 13 is entirely located within the opening area of ​​the flow-limiting orifice plate 12. An annular airflow channel is formed between the flow-limiting orifice plate 12 and the regulating plate 13, and the area of ​​the gas channel is F2 = F1 - F t In this state, the gas flow rate through flow restrictor valve 1 is V2 = 45 m³. 3 / min, which is the lower limit flow rate of the heating gas regulation range; such as Figure 6 and Figure 7 As shown, when the regulating plate 13 is in the 90° stop position, its surface is perpendicular to the opening plane of the flow-limiting orifice plate 12, and the opening of the flow-limiting orifice plate 12 is not blocked by the regulating plate. The area of ​​the gas passage is the opening area F1 of the flow-limiting orifice plate 12. In this state, the gas flow rate through the flow-limiting valve 1 is V1 = 65m³. 3 / min.

[0043] In this implementation, the coke oven carbonization chamber height is 7m, the coal loading capacity is 41.72t, the coking time is 20 hours, and the duration T1 of the regulating plate 13 being at the 0° position during one exchange period is 15min. Therefore, the gas supply during one exchange period is V=65*(30-15)+45*15=1650m³. 3 .

[0044] In this embodiment, one end of the valve shaft 14 passes through the valve body, and the other end passes through the sealing module 15 and is connected to the actuator 16. The sealing module 15 is a magnetic fluid sealing module, and the actuator 16 is a pneumatic actuator. The sealing cover 17 is detachably installed on the outside of the orifice plate groove of the valve body 11. The sealing cover is larger than the outer contour of the flow limiting orifice plate. When the sealing cover 17 is removed from the valve body 11, the flow limiting orifice plate 12 inside the valve body 11 can be pulled out and replaced. According to the set gas flow rate V1, the flow limiting orifice plate 12 of the corresponding specification (different opening diameter) is selected and installed to realize flow regulation.

[0045] The specific parameters of the equipment for adjusting the supply of heating gas to the coke oven combustion chamber in this embodiment are as follows:

[0046] The carbonization chamber is 7m high;

[0047] The coal loading capacity of the carbonization chamber is 41.72 tons.

[0048] Coking time: 20 hours;

[0049] The exchange cycle is 30 minutes.

[0050] Set the gas supply to 1650m³ during the exchange period. 3 ;

[0051] Gas flow rate V1 (90°) from the flow control valve: 65m³ 3 / min;

[0052] The orifice diameter of the flow-limiting plate is 135mm;

[0053] Gas flow rate V2 (0°) from the flow limiting valve: 45m³ 3 / min;

[0054] The adjusting plate has a diameter of 60mm;

[0055] The heating control system is set to have a flow-limiting valve regulating plate in the "0°" position for a period of time T1 during the switching cycle. The total gas supply during this switching cycle is:

[0056] V = 65 * (30 - T1) + 45 * T1

[0057] Given T1 = 15 min, the gas supply during this exchange cycle is:

[0058] V = 65 * (30 - 15) + 45 * 15 = 1650m 3

[0059] By adjusting the duration of T1 within the exchange cycle, the amount of gas supplied within the exchange cycle can be changed to meet the gas heating requirements of the combustion chamber for one coking cycle.

[0060] When the coke oven is heated by blast furnace gas or coke oven gas, the flow rate adjustment methods for blast furnace gas and coke oven gas are the same.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for regulating the supply of heating gas to the combustion chamber of a coke oven, characterized in that, Includes a flow limiting valve (1), a heating control system (2), an exchange cock (3), a blast furnace gas main pipe, a blast furnace gas branch pipe, a regenerative small flue, a coke oven gas main pipe, a coke oven gas branch pipe, and a combustion chamber lower spray pipe; The blast furnace gas main pipe, blast furnace gas branch pipe, and regenerative small flue are connected in sequence. On the blast furnace gas branch pipe, a flow limiting valve (1) and an exchange plug (3) are sequentially installed along the direction from the blast furnace gas main pipe to the regenerative small flue. The main coke oven gas pipe, the branch coke oven gas pipe, and the lower spray pipe of the combustion chamber are connected in sequence. On the coke oven gas branch pipe, a flow limiting valve (1) and an exchange valve (3) are sequentially installed along the direction from the main coke oven gas pipe to the lower nozzle of the combustion chamber. The heating control system (2) is connected to the flow limiting valve (1) on the blast furnace gas branch pipe, the exchange valve (3) on the blast furnace gas branch pipe, the flow limiting valve (1) on the coke oven gas branch pipe, and the exchange valve (3) on the coke oven gas branch pipe.

2. The device for adjusting the supply of heating gas to the coke oven combustion chamber according to claim 1, characterized in that, The flow limiting valve (1) includes a valve body (11), a flow limiting orifice plate (12), an adjusting plate (13), a valve shaft (14), a sealing module (15), an actuator (16), and a sealing cover (17). The valve body (11) is provided with a detachable flow limiting plate (12). The adjusting plate (13) is fixedly connected to the valve shaft (14). The adjusting plate (13) can rotate with the valve shaft (14) between two stop positions of 0° and 90°. The plate size of the adjusting plate (13) is smaller than the opening size of the flow limiting plate (12). When the adjusting plate (13) is in the 0° stop position, its plate surface is parallel to the opening plane of the flow limiting plate (12), and the adjusting plate (13) is located entirely within the opening area of ​​the flow limiting plate (12). When the adjusting plate (13) is in the 90° stop position, its plate surface is perpendicular to the opening plane of the flow limiting plate (12); The valve shaft (14) passes through the valve body (11) and then passes through the sealing module (15) to connect with the actuator (16); The sealing cap (17) is detachably installed on the outside of the orifice slot of the valve body (11).

3. The device for adjusting the supply of heating gas to the coke oven combustion chamber according to claim 2, characterized in that, The valve shaft (14) is an L-shaped shaft, and the adjusting plate (13) is vertically fixed to the end of the valve shaft (14).

4. The device for adjusting the supply of heating gas to the coke oven combustion chamber according to claim 2, characterized in that, The actuator (16) is a pneumatic actuator.

5. The device for adjusting the supply of heating gas to the coke oven combustion chamber according to claim 2, characterized in that, The sealing module (15) is a magnetohydrodynamic sealing module.

6. The device for adjusting the supply of heating gas to the coke oven combustion chamber according to claim 2, characterized in that, The opening of the flow-limiting orifice plate matches the outer contour of the adjusting plate.

7. The device for adjusting the supply of heating gas to the coke oven combustion chamber according to claim 6, characterized in that, The flow-limiting orifice plate (12) has a circular opening, and the surface of the adjusting plate (13) is circular.

8. The device for adjusting the supply of heating gas to the coke oven combustion chamber according to claim 2, characterized in that, The sealing cap (17) is larger than the outer contour of the flow-limiting orifice plate (12).

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