A feedforward and dynamic regulation device for heating gas in a single combustion chamber of a coke oven
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-28
- Publication Date
- 2026-08-14
AI Technical Summary
然而，受现有焦炉加热煤气系统及炉体结构的限制，缺乏对每个燃烧室煤气流量的动态调节手段，因此目前仍普遍采用恒流量供给方式
[0042]1)焦炉热工调节手段灵活、简单、灵敏度高。节约焦炉炼焦耗热量3～4％。
Smart Images
Figure CN224633438U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to coking technology, and more particularly to a feedforward and dynamic adjustment device for heating coal gas in a single combustion chamber of a coke oven. Background Technology
[0002] A coke oven is an industrial furnace that converts coking coal into coke through high-temperature dry distillation. Modern coke ovens employ a multi-chamber furnace system structure, consisting of several carbonization chambers and combustion chambers arranged alternately. In the carbonization chambers, the coal is heated by adjacent combustion chambers and undergoes high-temperature dry distillation to form coke. The heating gas (which can be blast furnace gas or coke oven gas) and air are burned in the vertical flues of the combustion chamber.
[0003] When blast furnace gas is used for heating, both the gas and air are preheated in a regenerator before entering the combustion chamber. When coke oven gas is used, the gas enters the combustion chamber directly through a brick gas duct, while the air is preheated in a regenerator before being mixed and burned. The flue gas produced by combustion enters a regenerator for cooling and is then discharged to the distribution flue through a small flue.
[0004] In a coke oven unit, the regenerator and combustion chamber are interconnected via vertical flues. The regenerator is divided into an upward airflow regenerator (used for preheating coal gas and air) and a downward airflow regenerator (used for cooling flue gas), arranged alternately to form upward and downward airflow channels within the oven body. Driven by a hydraulic exchanger, the coke oven process equipment periodically switches between the upward airflow (coal gas and air) and the downward airflow (combustion flue gas), achieving alternating airflow directions.
[0005] Currently, coke oven heating gas systems typically supply gas evenly to each combustion chamber at a constant flow rate. However, the thermophysical parameters (such as thermal conductivity and heat capacity) of the coal in the carbonization chamber change at different stages, such as drying, melting, and semi-coke solidification. This results in the heat transfer from the furnace wall to the coal and the heat transfer within the coal exhibiting unsteady-state characteristics during a coking cycle, specifically manifested as a gradual decrease in heat transfer over time.
[0006] To mitigate fluctuations in heat flow from the combustion chamber to adjacent carbonization chambers, coke ovens typically employ intermittent coal charging sequences (such as 2-1 or 5-2 sequences). Taking the 2-1 sequence as an example, as the coking process progresses in adjacent carbonization chambers, the standard flue temperature in the combustion chamber exhibits periodic fluctuations, with an amplitude of approximately 50°C. Reducing these temperature fluctuations helps to increase the coal heating rate and lower energy consumption. However, due to limitations in existing coke oven heating gas systems and furnace structure, there is a lack of dynamic adjustment mechanisms for the gas flow rate in each combustion chamber; therefore, a constant flow supply method is still widely used. Utility Model Content
[0007] The purpose of this invention is to address the above-mentioned problems by proposing a feedforward and dynamic adjustment device for heating coal gas in a single combustion chamber of a coke oven. This device can improve coking production efficiency and meet the requirements of high efficiency, energy saving and environmental protection in coking production.
[0008] 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.
[0009] To achieve the above objectives, the technical solution adopted by this utility model is: a feedforward and dynamic adjustment device for heating gas in a single combustion chamber of a coke oven.
[0010] (a) When the coke oven is heated by coal gas (mixed coal gas)
[0011] The feedforward and dynamic regulation equipment for heating gas in a single combustion chamber of a coke oven includes: a flow limiting valve 1, a resistance regulating switch 2, a heating control system 3, and an exchange cock 4;
[0012] Except for the flow limiting valve 1, the resistance regulating switch 2 and the heating control system 3, the arrangement and connection of the coke oven body 5 and the coking equipment can be conventionally configured.
[0013] An air passage and a gas passage are arranged in parallel inside the resistance regulating switch 2. The outlets of the air passage and the gas passage are respectively connected to the coke oven 5 (through the coke oven small flue 6). The main gas supply pipe is connected to the coke oven body 5 through the gas passage. The coke oven body 5 (combustion chamber) is connected to the coke oven branch flue 7 through the resistance regulating switch 2 (air passage and gas passage).
[0014] The resistance regulating switch 2 is provided with a flap shaft that runs through the air passage and the gas passage. The regulating flaps of the air passage and the gas passage are respectively installed on the flap shaft. The resistance regulating switch 2 can adjust the gas flow rate of the air passage and the gas passage.
[0015] The flow limiting valve 1 and the exchange valve 4 are installed in the gas supply main pipe (combustion chamber mixed gas supply main pipe); the flow limiting valve 1 can adjust the gas flow rate of the gas supply main pipe, and the exchange valve 4 can adjust the opening or closing of the gas supply main pipe.
[0016] The heating control system 3 is communicatively connected to the flow limiting valve 1, the resistance regulating switch 2, and the exchange valve 4. The heating control system 3 can control the exchange valve 4 and the resistance regulating switch 2 to perform timed airflow alternation according to a set exchange cycle. Coal gas and air (rising airflow) can enter the coke oven body 5 through the resistance regulating switch 2. Coal gas enters the coke oven body 5 through the flow limiting valve 1, the exchange valve 4, and the resistance regulating switch 2. After the exchange valve 4 reverses its direction, the combustion flue gas (falling airflow) enters the coke oven flue 7 through the resistance regulating switch 2.
[0017] (ii) When the coke oven is heated by coke oven gas
[0018] The feedforward and dynamic regulation equipment for heating gas in a single combustion chamber of a coke oven includes: a flow limiting valve 1, a resistance regulating switch 2, a heating control system 3, and an exchange cock 4;
[0019] Except for the flow limiting valve 1, the resistance regulating switch 2 and the heating control system 3, the arrangement and connection of the coke oven body 5 and the coking equipment can be conventionally configured.
[0020] The first air passage and the second air passage are arranged in parallel inside the resistance regulating switch 2. The outlets of the first air passage and the second air passage are respectively connected to the coke oven 5 (through the coke oven small flue 6). The coke oven gas supply main pipe is connected to the gas lower spray pipe of the coke oven body 5. The coke oven body 5 is connected to the coke oven branch flue 7 through the resistance regulating switch 2 (the first air passage and the second air passage).
[0021] The resistance regulating switch 2 is provided with a flap shaft that passes through the first air passage and the second air passage. The regulating flaps of the first air passage and the second air passage are respectively installed on the flap shaft. The resistance regulating switch 2 can adjust the air flow of the first air passage and the second air passage.
[0022] The flow limiting valve 1 and the exchange cock 4 are installed inside the coke oven gas supply main pipe; the coke oven gas flow limiting valve can adjust the gas flow rate of the coke oven gas supply main pipe, and the exchange cock 4 can adjust the opening or closing of the coke oven gas supply main pipe.
[0023] The heating control system 3 is communicatively connected to the flow limiting valve 1, the resistance regulating switch 2, and the exchange valve 4. The heating control system 3 can control the exchange valve 4 and the resistance regulating switch 2 to perform timed airflow alternation according to the set exchange cycle. Air (rising airflow) can enter the coke oven body 5 through the resistance regulating switch 2, and coke oven gas can enter the coke oven body 5 through the flow limiting valve 1. After the exchange valve 4 is reversed, the combustion flue gas (falling airflow) can enter the coke oven branch flue 7 through the resistance regulating switch 2.
[0024] Furthermore, when the coke oven is heated by coal gas: the exchange valve 4 is closer to the outlet of the main coal gas supply pipe than the flow limiting valve 1.
[0025] Furthermore, when the coke oven is heated by coke oven gas: the exchange valve 4 is closer to the outlet of the main coke oven gas supply pipe than the flow limiting valve 1.
[0026] Furthermore, such as Figure 3-7 As shown, the flow-limiting valve 1 includes a valve body 11 and a pneumatic actuator 14. The valve body 11 contains a valve shaft 15, a flow-limiting orifice plate 12, and an adjusting plate 13. The pneumatic actuator 14 is connected to the adjusting plate 13 via the valve shaft 15 and can drive the adjusting plate 13 to rotate. The outer diameter of the adjusting plate 13 is smaller than the inner diameter of the flow-limiting orifice plate 12. When the flow-limiting orifice plate 12 and the adjusting plate 13 are parallel, the adjusting plate 13 partially blocks the flow-limiting orifice plate 12, forming an annular airflow channel between them. The adjusting plate 13 has only two limit states: 0° (adjusting plate vertical, flow-limiting orifice plate 12 perpendicular to adjusting plate 13) and 90° (adjusting plate horizontal, flow-limiting orifice plate 12 parallel to adjusting plate 13). In the vertical state, the gas flow rate is V1 m³. 3 / min, the gas flow rate in the horizontal state of regulating plate 13 is V2 m 3 / min.
[0027] Furthermore, the flow limiting orifice plate 12 inside the flow limiting valve 1 can be disassembled and replaced, and flow limiting orifice plates 12 with different F1 areas can be replaced according to the requirements of gas flow rate V1.
[0028] Furthermore, the regulating plate 13 inside the flow limiting valve 1 (installed on the valve shaft 15) can be disassembled and replaced, and regulating plates 13 of different diameters can be replaced according to the requirements of the gas flow rate V2.
[0029] Furthermore, the resistance regulating opener / closer 2 includes a resistance regulating flap 21 and an external cylinder, such as... Figure 9 As shown, the external cylinder drives the flap shaft to rotate synchronously via a connecting rod, changing the position of the resistance regulating flap 21, thereby adjusting the airflow resistance of the gas channel and the air channel. In the upward airflow state, the gas and air are supplied to the coke oven small flue 6 through the resistance regulating switch 2, and the resistance regulating flap 21 adjusts the airflow according to the gas supply. In the downward airflow state, the flue gas is discharged to the coke oven branch flue 7 through the resistance regulating switch 2, and the resistance regulating flap 21 adjusts the airflow resistance according to the change in flue gas flow.
[0030] Using the feedforward and dynamic adjustment equipment for heating coal gas in a single combustion chamber of a coke oven, under stable main gas supply pressure, when the regulating plate 13 of the flow limiting valve 1 is at 0°, the area of the coal gas channel of the flow limiting valve 1 is equal to the area F1 of the flow limiting orifice plate 12. The flow rate V1 of the heating coal gas through the opening of the flow limiting orifice plate 12 is the upper limit flow rate of the heating coal gas adjustment range. When the regulating plate 13 of the flow limiting valve 1 is at 90°, due to the obstruction of the airflow channel by the area Ft of the regulating plate 13, the area F2 of the airflow channel of the flow limiting valve 1 is equal to F1-Ft. The flow rate V2 of the heating coal gas through the flow limiting valve is the lower limit flow rate of the heating coal gas adjustment range.
[0031] Furthermore, the resistance adjustment flap 21 has two adjustment positions, such as... Figure 9 As shown, the resistance regulating flap 21 is parallel to the axis of the air passage and the gas passage, and is denoted as position "0". Position "0" has the minimum resistance, which meets the resistance requirement for passing through the maximum flue gas flow. The resistance regulating flap 21 is at an angle of 60 to 75° with the axis of the air passage and the gas passage, and is denoted as position "1". Position "1" has the maximum resistance, which meets the resistance requirement for passing through the minimum flue gas flow.
[0032] When the flow rate of the heating gas and air in the combustion chamber changes, the resistance of the rising and falling airflows at various parts of the coke oven body 5 changes accordingly. This causes fluctuations in the gas pressure within the gas passage of the coke oven body. In order to maintain the pressure of the observation hole in the vertical flue, a key part of the coke oven body 5, stable at 0-5 Pa, as the flow limiting valve 1 adjusts the gas, the air flow of the resistance regulating switch 2 needs to be adjusted simultaneously; that is, when the adjusting plate 13 of the flow limiting valve 1 is adjusted to the 0° position, the resistance regulating flap 21 of the resistance regulating switch 2 is adjusted to "0"; when the adjusting plate 13 of the flow limiting valve 1 is adjusted to the 90° position, the resistance regulating flap 21 of the resistance regulating switch 2 is adjusted to position 1.
[0033] Furthermore, the coke oven is heated by coal gas or coke oven gas, and the method for regulating the mixed coal gas flow rate is the same as the method for regulating the coke oven gas flow rate.
[0034] The feedforward and dynamic regulation method for supplying heating gas to the single combustion chamber of the coke oven using the aforementioned feedforward and dynamic regulation equipment is as follows:
[0035] a. Set the exchange period T 交换 For 20 to 30 minutes.
[0036] b. The hydraulic exchanger drives the odd-numbered and even-numbered transmission rods respectively. The odd-numbered transmission rod opens the reversing cock of the gas pipe (odd number) in the rising airflow regenerator chamber, and the even-numbered transmission rod closes the reversing cock of the gas pipe (even number) in the adjacent descending airflow regenerator chamber; and the above actions are timed. The rising airflow gas main pipe supplies gas to the combustion chamber through the regenerator chamber. The heating control system adjusts the position of the flow-limiting valve regulating plate according to the feedforward setting of the gas flow rate to change the gas flow. When the flow-limiting valve regulating plate is in the "0°" position, the flow-limiting valve passes through the gas flow rate V1; when the flow-limiting valve regulating plate is in the "90°" position, the flow-limiting valve passes through the gas flow rate V2; the time t during the exchange cycle is the time t during which the pneumatic mechanism of the flow-limiting valve controls the regulating plate to be in the 90° state.
[0037] The combustion chamber gas supply during one exchange cycle is V 周 .
[0038] V 周 =V1 * (T 交换 -t)+V2*t
[0039] c. The combustion chamber gas heating control system adjusts the time t when the regulating plate of the flow limiting valve 1 is in the "90°" position within the exchange cycle, based on the coking process of the adjacent carbonization chambers in the combustion chamber, and uses the exchange cycle as the time unit, so as to adjust the total gas supply within one exchange cycle.
[0040] d. As the position of the regulating plate 13 of the flow limiting valve 1 is at 0° or 90°, the resistance regulating flap of the resistance regulating switch 2 is synchronously in the "0" or "1" position.
[0041] This utility model of a feedforward and dynamic adjustment device for heating gas in a single combustion chamber of a coke oven has the following advantages compared with the prior art:
[0042] 1) The thermal control methods for coke ovens are flexible, simple, and highly sensitive, saving 3-4% of the heat consumption during coking.
[0043] 2) Based on the coke oven pushing-coal charging sequence, the supply of heating gas to each combustion chamber is adjusted in a feedforward, dynamic, and independent manner to enhance the initial heat supply to the carbonization chamber during coal charging and reduce the heat supply to the carbonization chamber during the final coking stage. This reduces the calorific value of the charged coal for coking while improving coke quality.
[0044] 3) A feedforward and dynamic adjustment device and method for heating gas in a single combustion chamber of a coke oven can be applied in the production of existing large coke ovens, which has good social and economic benefits.
[0045] This utility model relates to a feedforward and dynamic adjustment device for heating gas in a single combustion chamber of a coke oven. It can dynamically, precisely, and differentially adjust the gas supply to each combustion chamber of the coke oven. This effectively reduces coking energy consumption and improves coking production efficiency, meeting the requirements of high efficiency, energy saving, and environmental protection in coking production. Attached Figure Description
[0046] Figure 1 Diagram of a single-combustion-chamber gas and air supply system;
[0047] Figure 2 Diagram of a single combustion chamber flue gas system;
[0048] Figure 3 Plan view of the "0°" position of the gas flow limiting valve;
[0049] Figure 4 Cross-sectional view of the gas flow restrictor valve at the "0°" position (AA section);
[0050] Figure 5 Cross-sectional view of the gas flow restrictor valve at the "0°" position (BB section);
[0051] Figure 6 Plan view of the "90°" position of the gas flow limiting valve;
[0052] Figure 7 Cross-sectional view of the gas flow restrictor valve at the "90°" position (CC section);
[0053] Figure 8 Diagram of a single-combustion-chamber coke oven gas and air supply system;
[0054] Figure 9 Longitudinal sectional view of the resistance regulating switch;
[0055] Figure 10 Top view of the resistance regulating switch. Detailed Implementation
[0056] 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.
[0057] 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 for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.
[0058] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure of this application, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit this application.
[0059] Example 1
[0060] This embodiment discloses a feedforward and dynamic adjustment device for heating gas in a single combustion chamber of a coke oven, such as... Figures 1-7 As shown in Figures 9 and 10, the system includes a flow limiting valve 1, a resistance regulating switch 2, a heating control system 3, an exchange valve 4, a coke oven body, and process equipment.
[0061] Except for the gas flow limiting valve and resistance regulating switch, the layout and connection of the coke oven body and coking process equipment are the same as those of the existing coke oven.
[0062] An air passage and a gas passage are arranged in parallel inside the resistance regulating switch 2. The outlets of the air passage and the gas passage are respectively connected to the coke oven 5 (through the coke oven small flue 6). The gas supply main pipe is connected to the coke oven body 5 through the gas passage. The coke oven body 5 is connected to the coke oven branch flue 7 through the resistance regulating switch 2. A sealing structure that can move up and down is provided at the opening above the coke oven branch flue 7.
[0063] The resistance regulating switch 2 is equipped with a flap shaft that runs through the air passage and the gas passage, and the regulating flaps of the air passage and the gas passage are respectively installed on the flap shaft. The resistance regulating switch 2 can adjust the air flow rate of the air passage;
[0064] The flow limiting valve 1 and the exchange valve 4 are installed inside the gas supply main pipe (combustion chamber mixed gas supply main pipe). The exchange valve 4 is closer to the outlet of the gas supply main pipe than the flow limiting valve 1. The flow limiting valve 1 can adjust the gas flow rate of the gas supply main pipe, and the exchange valve 4 can adjust the opening or closing of the gas supply main pipe.
[0065] The heating control system 3 is communicatively connected to the flow limiting valve 1, the resistance regulating switch 2, and the exchange valve 4. The heating control system 3 can control the exchange valve 4 and the resistance regulating switch 2 to perform timed airflow alternation according to the set exchange cycle. Coal gas and air (rising airflow) can enter the coke oven body 5 through the resistance regulating switch 2. Coal gas enters the coke oven body 5 through the flow limiting valve 1, the exchange valve 4, and the resistance regulating switch 2. After the exchange valve 4 reverses direction, the combustion flue gas (falling airflow) enters the coke oven flue 7 through the resistance regulating switch 2 of the adjacent combustion chamber.
[0066] like Figure 3-7 As shown, the flow-limiting valve 1 includes a valve body 11 and a pneumatic actuator 14. The valve body 11 contains a valve shaft 15, a flow-limiting orifice plate 12, and an adjusting plate 13. The pneumatic actuator 14 is connected to the adjusting plate 13 via the valve shaft 15 and can drive the adjusting plate 13 to rotate. The outer diameter of the adjusting plate 13 is smaller than the inner diameter of the flow-limiting orifice plate 12. When the flow-limiting orifice plate 12 and the adjusting plate 13 are parallel, the adjusting plate 13 partially blocks the flow-limiting orifice plate 12, forming an annular airflow channel between them. The adjusting plate 13 has only two limit states: 0° (adjusting plate vertical, flow-limiting orifice plate 12 perpendicular to adjusting plate 13) and 90° (adjusting plate horizontal, flow-limiting orifice plate 12 parallel to adjusting plate 13). In the vertical state, the gas flow rate is V1 m³. 3 / min, the gas flow rate in the horizontal state of regulating plate 13 is V2 m 3 / min.
[0067] The flow limiting orifice plate 12 inside the flow limiting valve 1 can be disassembled and replaced. The flow limiting orifice plate 12 with different F1 areas can be replaced according to the requirements of the gas flow rate V1.
[0068] The regulating plate 13 inside the flow limiting valve 1 can be disassembled and replaced, and the regulating plate 13 of different diameters can be replaced according to the requirements of the gas flow rate V2.
[0069] The resistance regulating switch 2 includes a resistance regulating flap 21 and an external cylinder, such as Figure 9As shown, the external cylinder drives the flap shaft to rotate synchronously via a connecting rod, changing the position of the resistance-adjusting flap 21, thereby adjusting the airflow resistance of the gas and air passages. In the upward airflow state, gas and air are supplied to the coke oven's small flue 6 through the resistance-adjusting switch 2, and the resistance-adjusting flap 21 adjusts the airflow according to the gas supply. In the downward airflow state, flue gas is discharged to the coke oven's branch flue 7 through the adjacent combustion chamber's resistance-adjusting switch 2. Furthermore, the resistance-adjusting flap 21 adjusts its rotation angle according to the pressure changes at the coke oven's inspection holes.
[0070] The resistance adjustment flap 21 has two adjustment positions, such as... Figure 9 As shown, the resistance regulating flap 21 is parallel to the axis of the air passage and the gas passage, and is denoted as position "0". Position "0" has the minimum resistance, which meets the resistance requirement for passing through the maximum flue gas flow. The resistance regulating flap 21 is at an angle of 60 to 75° with the axis of the air passage and the gas passage, and is denoted as position "1". Position "1" has the maximum resistance, which meets the resistance requirement for passing through the minimum flue gas flow.
[0071] The hydraulic exchanger controls the opening and closing of the exchange valve 4 according to a set exchange cycle, periodically altering the airflow direction. The heating control system manages the flow rate of the combustion chamber heating gas.
[0072] The specific parameters of the feedforward and dynamic adjustment equipment and method for heating coal gas in a single combustion chamber of a coke oven in this embodiment are as follows:
[0073]
[0074]
[0075] The heating control system is set to have the flow-limiting valve regulating plate in the "90°" position for a given period of time (t) during the switching cycle. The total gas supply during this switching cycle is:
[0076] V = 65*(30-t) + 45*t
[0077] Given t = 15 min, the gas supply in one exchange cycle is:
[0078] V = 65 * (30 - 15) + 45 * 15 = 1650m 3
[0079] By adjusting the duration of time t 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.
[0080] Example 2
[0081] This embodiment discloses a feedforward and dynamic adjustment device for heating gas in a single combustion chamber of a coke oven, such as... Figure 8As shown, it includes: a flow limiting valve 1, a resistance regulating switch 2, a heating control system 3, and an exchange cock 4;
[0082] Except for the flow limiting valve 1, the resistance regulating switch 2 and the heating control system 3, the arrangement and connection of the coke oven body 5 and the coking equipment can be conventionally configured.
[0083] The first air passage and the second air passage are arranged in parallel inside the resistance regulating switch 2. The outlets of the first air passage and the second air passage are respectively connected to the coke oven 5. The main gas supply pipe of the coke oven is connected to the gas lower spray pipe of the coke oven body 5. The coke oven body 5 is connected to the coke oven branch flue 7 through the resistance regulating switch 2. A sealing structure that can move up and down is provided at the opening above the coke oven branch flue 7.
[0084] The resistance regulating switch 2 is provided with a flap shaft that passes through the first air passage and the second air passage. The regulating flaps of the first air passage and the second air passage are respectively installed on the flap shaft. The resistance regulating switch 2 can adjust the air flow of the first air passage and the second air passage.
[0085] The flow-limiting valve 1 and the exchange valve 4 are installed inside the main coke oven gas supply pipe; the exchange valve 4 is closer to the outlet of the main coke oven gas supply pipe than the flow-limiting valve 1. The coke oven gas flow-limiting valve can adjust the gas flow rate of the main coke oven gas supply pipe, and the exchange valve 4 can adjust the opening or closing of the main coke oven gas supply pipe.
[0086] The heating control system 3 is communicatively connected to the flow limiting valve 1, the resistance regulating switch 2, and the exchange valve 4. The heating control system 3 can control the exchange valve 4 and the resistance regulating switch 2 to perform timed airflow alternation according to the set exchange cycle. Coal gas and air (rising airflow) can enter the coke oven body 5 through the resistance regulating switch 2, and coke oven gas can enter the coke oven body 5 through the flow limiting valve 1. After the exchange valve 4 is reversed, the combustion flue gas (falling airflow) can enter the coke oven branch flue 7 through the resistance regulating switch 2.
[0087] The flow limiting valve 1 and the resistance regulating switch 2 are the same as in Embodiment 1. When the coke oven is heated by coke oven gas, the method for regulating the coke oven gas flow rate is the same as that for mixed gas.
[0088] 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 the 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 feedforward and dynamic adjustment device for heating gas in a single combustion chamber of a coke oven, characterized in that: (a) When the coke oven is heated by coal gas The feedforward and dynamic regulation equipment for heating gas in a single combustion chamber of a coke oven includes: a flow limiting valve (1), a resistance regulating switch (2), a heating control system (3), and an exchange cock (4); An air passage and a gas passage are arranged in parallel inside the resistance regulating switch. The outlets of the air passage and the gas passage are respectively connected to the coke oven (5). The main gas supply pipe is connected to the coke oven body (5) through the gas passage. The coke oven body (5) is connected to the coke oven flue (7) through the resistance regulating switch (2). The resistance regulating switch (2) is provided with a flap shaft that runs through the air passage and the gas passage, and the regulating flaps of the air passage and the gas passage are respectively installed on the flap shaft; The flow limiting valve (1) and the exchange valve (4) are installed inside the main gas supply pipe; The heating control system (3) is connected in communication with the flow limiting valve (1), the resistance regulating switch (2) and the exchange valve (4); (ii) When the coke oven is heated by coke oven gas The feedforward and dynamic regulation equipment for heating gas in a single combustion chamber of a coke oven includes: a flow limiting valve (1), a resistance regulating switch (2), a heating control system (3), and an exchange cock (4); The first air passage and the second air passage are arranged in parallel inside the resistance regulating switch (2). The outlets of the first air passage and the second air passage are respectively connected to the coke oven (5). The main gas supply pipe of the coke oven is connected to the gas lower spray pipe of the coke oven body (5). The coke oven body (5) is connected to the coke oven flue (7) through the resistance regulating switch (2). The resistance regulating switch (2) is provided with a flap shaft that passes through the first air passage and the second air passage, and the regulating flaps of the first air passage and the second air passage are respectively installed on the flap shaft; The flow limiting valve (1) and the exchange cock (4) are installed in the main coke oven gas supply pipe; The heating control system (3) is connected in communication with the flow limiting valve (1), the resistance regulating switch (2), and the exchange valve (4).
2. The feed forward, dynamic regulating device for heating gas in a single combustion chamber coke oven as set forth in claim 1, wherein, When the coke oven is heated by coal gas: the exchange valve (4) is closer to the outlet of the main coal gas supply pipe than the flow limiting valve (1).
3. The feed forward, dynamic regulating device for heating gas in a single combustion chamber coke oven as set forth in claim 1, wherein, When the coke oven is heated by coke oven gas: the exchange valve (4) is closer to the outlet of the main coke oven gas supply pipe than the flow limiting valve (1).
4. The feed forward, dynamic regulating device for single combustion chamber heating gas of a coke oven according to claim 1, characterized in that, The flow limiting valve (1) includes a valve body (11) and a pneumatic actuator (14). The valve body (11) is provided with a valve shaft (15), a flow limiting orifice plate (12) and an adjusting plate (13). The pneumatic actuator (14) is connected to the adjusting plate (13) through the valve shaft (15). The outer diameter of the adjusting plate (13) is smaller than the inner diameter of the flow limiting orifice plate (12). When the flow limiting orifice plate (12) and the adjusting plate (13) are parallel, the adjusting plate (13) partially blocks the flow limiting orifice plate (12), and an annular airflow channel can be formed between the flow limiting orifice plate (12) and the adjusting plate (13).
5. The feed forward, dynamic regulating device for single combustion chamber heating gas of a coke oven according to claim 1, characterized in that, The flow limiting orifice plate (12) inside the flow limiting valve (1) can be disassembled and replaced.
6. The feed forward, dynamic regulating device for single combustion chamber heating gas of a coke oven according to claim 1, characterized in that, The adjusting plate (13) installed on the valve shaft (15) inside the flow limiting valve (1) can be disassembled and replaced.
7. The feed forward, dynamic regulating device for single combustion chamber heating gas of a coke oven according to claim 1, characterized in that, The resistance regulating opener (2) includes a resistance regulating flap (21) and an external cylinder. The external cylinder drives the flap shaft to rotate synchronously through a connecting rod to change the position of the resistance regulating flap (21).
8. The feed forward, dynamic regulating device for heating gas in a single combustion chamber coke oven as set forth in claim 7, wherein, The resistance adjustment flap (21) has two adjustment positions. The resistance adjustment flap (21) is parallel to the axis of the air passage and the gas passage, and is marked as position "0". The resistance adjustment flap (21) is at an angle of 60 to 75° with the axis of the air passage and the gas passage, and is marked as position "1".