Method and system for regulating temperature of mixed-gas-fired single-port combustion chamber

Abstract

The present invention relates to the technical field of coke oven heating, and in particular to a method and system for regulating a temperature of a mixed-gas-fired single-port combustion chamber, comprising orifice plate application and pressure transmitter configuration; the system comprises regulation units, wherein one end of each regulation unit is respectively connected to a mixed heating gas main header, and the other end of each regulation unit is connected to a corresponding waste gas reversing valve, so that mixed gas sequentially passes through the mixed heating gas main header, the corresponding regulation unit, the corresponding waste gas reversing valve, and a corresponding regenerator, and enters a corresponding combustion chamber. The advantages of the present invention are: heating gas piping is connected in parallel to a gas regulating branch line, wherein the heating gas piping is sequentially provided with a regulating plug valve, an orifice plate housing, and a changeover plug valve, ensuring manual regulation independence; the gas regulating branch line is provided with a regulating valve, allowing for automatic and accurate gas flow regulation; and the orifice plate housing is internally provided with a variety of orifice plates with varying diameters, thereby meeting requirements for manual regulation and automatic regulation.

Description

A method and system for temperature regulation of a single-hole combustion chamber heated by mixed gas. Technical Field

[0001] This invention relates to the field of coke oven heating technology, and in particular to a method and system for regulating the temperature of a single-hole combustion chamber heated by mixed gas. Background Technology

[0002] Currently, coke ovens are mainly divided into single-heating and reheating types. Single-heating coke ovens primarily use coke oven gas for heating, while reheating coke ovens mainly use mixed gas. Especially in integrated iron and steel enterprises, a mixture of blast furnace gas and coke oven gas is commonly used for heating. While there is considerable research on automatic temperature control technology for coke oven gas heating combustion chambers, and it has been implemented in several coking plants, automatic temperature control technology for mixed gas heating combustion chambers remains undeveloped. This is primarily because coke oven gas has a stable calorific value, and the coke oven gas heating pipeline is directly connected to the combustion chamber, establishing a one-to-one correspondence. Therefore, the combustion chamber temperature can be continuously adjusted directly using regulating valves. However, mixed gas has a low calorific value and fluctuates significantly. Its heating characteristics involve the heating gas pipeline first entering the gas regenerator through a waste gas switch, and then connecting to the combustion chamber through the regenerator. To achieve automatic temperature control of the combustion chamber, each combustion chamber would be simultaneously controlled by regulating valves on two adjacent gas pipelines, making the control process complex. Summary of the Invention

[0003] The purpose of this invention is to provide a method and system for regulating the temperature of a single-hole combustion chamber in mixed gas heating. By adding a regulating unit between the exhaust gas switch and the main mixed gas pipe, the temperature stability of each combustion chamber is improved during mixed gas heating.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A method for temperature regulation in a single-hole combustion chamber heated by mixed gas includes:

[0006] S11, Orifice Plate Application

[0007] Different diameter perforated plates in the perforated plate box are used during normal production, during normal production near the side furnace, during normal production near the side furnace, during extended coking time, during extended coking time near the side furnace, during extended coking time near the side furnace, and during the transition from oven drying to normal heating.

[0008] S12, Pressure Transmitter Configuration

[0009] Configuration 1: Each regulating unit uses a remote pressure transmitter, and each combustion chamber uses a temperature-pressure cascade regulation method to control the regulating valve;

[0010] Configuration 2: The pressure transmitters of the first regulating unit near the side furnace and the last regulating unit near the other side furnace are remote pressure transmitters. The pressure transmitters of the regulating units in the first half and the second half of the mixed heating gas main pipe are remote pressure transmitters. The regulating valves of each combustion chamber are controlled by temperature regulation.

[0011] Choose either configuration 1 or configuration 2.

[0012] In S11, the orifice plate box contains the following:

[0013] Number the orifice plates in the orifice plate box from 1 to 7 according to their diameter from smallest to largest.

[0014] When using manual adjustment of the regulating valve, the regulating plug is opened to the fully open position. The numbered orifice plate 1 is used for the side furnace when extending the coking time; the numbered orifice plate 2 is used when switching from oven drying to normal heating; the numbered orifice plate 3 is used for the side furnace during normal production; the numbered orifice plate 4 is used for the side furnace when extending the coking time; the numbered orifice plate 5 is used for extending the coking time; the numbered orifice plate 6 is used for the side furnace during normal production; and the numbered orifice plate 7 is used during normal production.

[0015] When using an automatic regulating valve, the orifice plate boxes near the first regulating unit and the last regulating unit of the side stove use orifice plate number 1, while the orifice plate boxes of other regulating units all use orifice plate number 5.

[0016] In configuration 1, the temperature-pressure cascade regulation method controls the regulating valve as follows: the difference between the measured temperature and the target temperature is used as the regulation input of the main regulating unit of the cascade regulating valve; the deviation between the output of the main regulating unit of the cascade regulating valve and the measured value of the pressure transmitter is used as the input of the secondary regulating unit of the cascade regulating valve; the output of the secondary regulating unit of the cascade regulating valve is transmitted to the regulating valve; the measured temperature is taken as the average value of the temperatures of two adjacent combustion chambers.

[0017] In configuration 2, each combustion chamber uses a temperature regulation method to control the regulating valve. Before switching from manual to automatic regulation, the following steps are taken:

[0018] S21, Replace the orifice plate, that is, the orifice plate boxes near the first and last adjustment units of the side stove use the number 1 orifice plate, and the orifice plate boxes of other adjustment units all use the number 5 orifice plate, and adjust the adjustment valve in each adjustment unit to the same opening degree.

[0019] S22, adjust the opening of the regulating cock and regulating valve of the first regulating unit near the side stove so that the reading of the pressure transmitter of the first regulating unit is stable at the set pressure and the regulating valve is at a suitable opening.

[0020] S23, adjust the opening of the regulating cock and regulating valve of the regulating unit equipped with a remote pressure transmitter in the first half of the heating gas main pipe so that the reading of the remote pressure transmitter is stable at the set pressure and the regulating valve is at a suitable opening. Record the position of the regulating cock and regulating valve of the regulating unit. Then, adjust the opening of the regulating cock and regulating valve of the regulating unit without a remote pressure transmitter in the first half of the heating gas main pipe to the same position.

[0021] S24. Adjust the opening of the regulating valve and regulating cock of the regulating unit equipped with a remote pressure transmitter in the latter half of the heating gas main pipe so that the reading of the remote pressure transmitter is stable at the set pressure and the regulating valve is at a suitable opening. Record the position of the regulating valve and regulating cock of the regulating unit. Then, adjust the opening of the regulating valve and regulating cock of the regulating unit without a remote pressure transmitter in the latter half of the heating gas main pipe to the same position.

[0022] S25, adjust the opening of the regulating cock and regulating valve of the last regulating unit near the side stove on the other side, so that the reading of the pressure transmitter is stable at the set pressure and the regulating valve is at a suitable opening.

[0023] S26. Re-observe the readings of each pressure transmitter. If the deviation from the set pressure is not significant, then activate automatic adjustment; otherwise, repeat S22~S25.

[0024] The appropriate opening range is 50-70%.

[0025] Set the pressure using the following formula:

[0026]

[0027] In formula ①, To set the pressure, P0 is the design pressure value of the main heating gas pipeline, and K is the orifice plate resistance coefficient. The density of gas under standard conditions. t represents the design value of the gas branch pipe flow velocity, and t represents the gas temperature.

[0028] A temperature regulation system for a single-hole combustion chamber heated by mixed gas includes regulation units. One end of each regulation unit is connected to a main pipe for mixed heating gas, and the other end of each regulation unit is connected to a corresponding exhaust gas switch. This allows the mixed gas to pass sequentially through the main pipe for mixed heating gas, the corresponding regulation unit, the corresponding exhaust gas switch, and the corresponding heat storage chamber before entering the corresponding combustion chamber.

[0029] A single-sided heated coke oven has N+1 regulating units, while a double-sided heated coke oven has 2N+2 regulating units, where N is the number of combustion chambers.

[0030] The regulating unit includes a heating gas pipeline and a gas regulating branch pipe. The heating gas pipeline and the gas regulating branch pipe are connected in parallel. The heating gas pipeline is equipped with a regulating cock, an orifice box, and an exchange cock in sequence. The gas regulating branch pipe is equipped with a regulating valve. The pipeline connection of the exchange cock and the orifice box is connected to the other end of the regulating valve. The input end of the regulating cock is connected to one end of the regulating valve.

[0031] The output end of the exchange cock is equipped with a pressure transmitter; the orifice plate box is equipped with a variety of orifice plates of different sizes, with ≥7 types of orifice plates. For single-sided heated coke oven side furnaces and adjacent furnaces, the number of orifice plates used is >2, and the number of other orifice plates is >N-3; for double-sided heated coke oven side furnaces and adjacent furnaces, the number of orifice plates used is ≥4, and the number of other orifice plates is >2N-6.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. The heating gas pipeline and the gas regulating branch pipe are connected in parallel. The heating gas pipeline is equipped with a regulating cock, an orifice box, and an exchange cock in sequence to ensure the independence of manual regulation. The gas regulating branch pipe is equipped with a regulating valve, which can realize the automatic and precise regulation of the gas flow rate.

[0034] 2. The orifice plate box is equipped with a variety of orifice plates with different diameters to meet the needs of manual and automatic adjustment;

[0035] 3. By configuring pressure measuring points and adjusting temperature, the temperature of the mixed gas combustion chamber can be automatically adjusted to ensure uniform straight-line temperature.

[0036] 4. Using configuration 1, temperature-pressure cascade regulation is adopted, which can quickly and continuously adjust the temperature of each combustion chamber.

[0037] 5. It retains the traditional manual adjustment method, and the automatic adjustment scheme will not affect the traditional manual adjustment. When the regulating valve fails, it can be switched to manual adjustment at any time. The structure is simple and the operation is convenient.

[0038] 6. It significantly reduces the amount of manual work in the dangerous areas of the coke oven basement, lowers labor costs, and contributes to the health and safety of maintenance personnel. Attached Figure Description

[0039] Figure 1 is a schematic diagram of the regulating unit of the single-hole combustion chamber for mixed gas.

[0040] Figure 2 is a flowchart of the combustion chamber temperature-pressure cascade control during the current exchange cycle.

[0041] Figure 3 is a flowchart of the combustion chamber temperature-pressure cascade control for the next exchange cycle.

[0042] Figure 4 shows the layout of pressure measuring points for configuration 1.

[0043] Figure 5 shows the layout of pressure measuring points for the second configuration scheme.

[0044] In the diagram: 1-Main pipe for mixing and heating gas 2-Regulating valve 3-Orifice plate box 4-Exchange valve 5-Gas regulating branch pipe 6-Stop valve A 7-Stop valve B 8-Regulating valve 9-Stop valve C 10-Pressure transmitter. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0046] The following embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. Unless otherwise specified, the methods used in the following embodiments are conventional methods. Example

[0047] A coking plant uses a 60-hole carbonization chamber reheating single-sided heating coke oven with a total of 61 combustion chambers, numbered sequentially from 1 to 61#. The entire heating gas regulation system requires 62 sets of single-hole combustion chamber regulation units, numbered sequentially from 1# to 62#. One end of each regulation unit is connected to the main mixing heating gas pipe, and the other end of each regulation unit is connected to the gas inlet of the corresponding exhaust gas switch, so that the mixed gas passes sequentially through the main mixing heating gas pipe, the corresponding regulation unit, the corresponding exhaust gas switch, and the corresponding regenerator before entering the corresponding combustion chamber.

[0048] The single-hole combustion chamber regulating unit is shown in Figure 1. Each regulating unit includes a heating gas pipeline 1 and a gas regulating branch pipe 5. The heating gas pipeline 1 and the gas regulating branch pipe 5 are connected in parallel. The heating gas pipeline is equipped with a regulating cock 2, an orifice plate box 3, and an exchange cock 4 in sequence. The regulating cock 2 has a scale indicator, which can be seen during adjustment. The scale range is 0~90°. The gas regulating branch pipe 5 is equipped with a shut-off valve (A) 6, a regulating valve 8, and a shut-off valve (B) 7 in sequence. The regulating valve 8 is a pneumatic regulating valve. It can be selected as a pneumatic single-seat regulating valve, a pneumatic low-load regulating butterfly valve, or a pneumatic V-type regulating ball valve. The normal regulating flow of the regulating valve is taken as the difference between the normal heating gas flow and the gas flow for extending the coking time in each branch pipe. When selecting the size and type of the regulating valve, it is ensured that the normal regulating gas flow is achieved. The opening of the selected regulating valve is between 50° and 70°, and the regulating valve also needs to have a signal interruption holding function; the connection between the exchange cock 4 and the orifice plate box 3 is connected to the other end of the stop valve (B) 7, and the input end of the regulating cock 2 is connected to one end of the stop valve (A) 6. The orifice plate box 3 is equipped with seven sizes of orifice plates, which are used during normal production, during normal production near the furnace, during normal production near the furnace, during extended coking time, during extended coking time near the furnace, during extended coking time near the furnace, and during the transition from oven drying to normal heating; the orifice plate sizes in the orifice plate box 3 are numbered 1 to 7 from smallest to largest, and the corresponding sizes are D1 to D7 from smallest to largest.

[0049] A method for temperature regulation in a single-hole combustion chamber heated by mixed gas, the details of which are as follows:

[0050] 1) Orifice plate usage

[0051] When manually adjusting the control valve or during valve maintenance, close stop valve A (6), stop valve (B) 7, and stop valve C (9), and open the adjusting plug 2 to the fully open position; at this time, the orifice plate in the orifice plate box is set as follows:

[0052] The numbered plate 1 is used for the side furnace when extending the coking time; the numbered plate 2 is used when switching to normal heating after the oven drying is finished; the numbered plate 3 is used for the side furnace during normal production; the numbered plate 4 is used for the side furnace when extending the coking time; the numbered plate 5 is used for extending the coking time; the numbered plate 6 is used for the side furnace during normal production; and the numbered plate 7 is used during normal production.

[0053] When automatic adjustment is used, open the shut-off valve A (6) and shut-off valve (B) 7. Use the number 1 orifice plate in the orifice plate box 3 near the No. 1 adjustment unit of the side furnace and the No. 62 adjustment unit of the side furnace on the other side. Use the number 5 orifice plate in the orifice plate box 3 of the No. 2 to No. 61 adjustment units.

[0054] The reason for selecting a smaller orifice plate (during extended coking) during automatic adjustment is that the gas flow rate is larger during normal heating of the coke oven and smaller during extended coking. The difference between these two flow rates is the flow range that the regulating valve 8 needs to automatically adjust. Since the regulating valve 8 is connected in parallel with the orifice plate box 3, when the regulating valve (8) is fully closed, it is equivalent to the gas flow rate during extended coking. When the regulating valve 8 is opened to a certain degree, the flow rate returns to the state during normal production. If it is necessary to ensure that the flow rate is also adjustable during extended coking, the opening of the regulating cock 2 should generally be reduced.

[0055] 2) Pressure transmitter configuration

[0056] Configuration 1, Figure 4, contents are as follows:

[0057] After the exchange valve 4 in the single-orifice combustion chamber temperature regulation units #1 to #62, a remote pressure transmitter is installed, as shown in Figures 2 and 3. This illustrates the working mode of the mixed gas heating single-orifice combustion chamber temperature regulation system and the single-orifice combustion chamber temperature-pressure cascade regulation scheme adopted in this invention. The mixed gas is heated by passing through the gas regulation unit, the exhaust gas switch, and the accumulator chamber into the combustion chamber. Since the heated gas from each accumulator chamber simultaneously enters two adjacent combustion chambers, each regulation unit will simultaneously control the temperature of two combustion chambers within one exchange cycle. The exchange valves 4 of the two adjacent regulation units will alternately open and close as the exchange cycle changes. As shown in Figure 2, during the first exchange cycle, the exchange valve 4 of the N# regulating unit is opened. At this time, the selection switch HSn of the PLC / DCS control system is turned on. The deviation between the target temperature and the average temperature of the N# combustion chamber and the N+1# combustion chamber is used as the input of the cascade main regulating unit. The deviation between the output of the main regulating unit and the measured value of the pressure transmitter 10 is used as the input of the cascade secondary regulating unit. The output of the secondary regulating unit is the valve position control value of the N# regulating valve 8. At this time, the adjacent N+1# regulating valve does not participate in the regulation. As shown in Figure 3, at the start of the next exchange cycle, the exchange valve 4 of the N# regulating unit is closed, cutting off the heating gas. At this time, the selector switch HSn is disconnected (the selector switch HSn is set in the control system), and the N# regulating valve 8 loses its control signal and will no longer participate in regulation. Since the regulating valve 8 has a signal-off holding function, it will maintain the opening at the end of the previous exchange cycle. Meanwhile, the exchange valve 4 of the adjacent N+1# regulating unit is turned on, and the gas enters the N# and N+1# combustion chambers through the regulating unit. At this time, HSn+1 is turned on, and the N+1# regulating valve will be PID cascaded regulated by the temperature of the N# and N+1# combustion chambers and the pressure collected by the remote pressure transmitter 10 of the N+1# regulating unit. This configuration scheme and regulation method can solve the problem of lag in combustion chamber temperature changes and achieve rapid, continuous and accurate regulation of single-hole combustion chamber temperature.

[0058] Configuration 2, Figure 5, content as follows:

[0059] Pressure gauge 10 (P1) and pressure gauge 10 (P4) are installed in both regulating units #1 and #62. A pressure gauge 10 (P2) is installed after the exchange valve 4 of one regulating unit (e.g., #15) in both #2 and #31, representing the pressure of each heating gas branch pipe in the first half of the main heating gas pipe. A pressure gauge 10 (P3) is installed after the exchange valve 4 of one regulating unit (e.g., #45) in both #32 and #62, representing the pressure of each heating gas branch pipe in the second half of the main heating gas pipe. The reason for separately installing regulating units #1 and #62 is that the temperature fluctuation in the side combustion chamber is large, requiring a larger adjustment amount compared to other combustion chambers, thus necessitating independent consideration. The on-site pressure gauges are mainly used to set the initial opening of regulating valve 8 and regulating valve 2 before automatic regulation is initiated. Due to the large lag in combustion chamber temperature changes, automatic regulation will be difficult to achieve if the initial opening is not set properly. Therefore, before putting the automatic adjustment into operation, the orifice plate of the required size for automatic adjustment must be replaced. Orifice plate No. 1 is used for units 1 and 62, and orifice plate No. 5 is used for units 2 to 61. For adjustment units 1 and 62, adjust the opening of the adjusting valve 2 and the adjusting valve 8 according to the readings of pressure gauges 10 (P1) and 10 (P4) to make pressure gauges 10 (P1) and 10 (P4) stable at the set pressure, and the adjusting valve 8 should preferably be between 50% and 70%. For adjustment units 2 to 31, adjust the opening of the adjusting valve 2 and the adjusting valve 8 according to the reading of pressure gauge 10 (P2) of adjustment unit 15 to make pressure gauge 10 (P2) stable at the set pressure, and the adjusting valve 8 should preferably be between 50% and 70%. After adjustment, record the positions of adjusting valve 2 and regulating valve 8 of regulating unit #15, and then adjust adjusting valve 2 and regulating valve 8 of other regulating units #2 to #31 to the same position. For regulating units #32 to #61, adjust the opening of adjusting valve 2 and regulating valve 8 according to the reading of pressure gauge 10 (P3) of regulating unit #45, so that pressure gauge 10 (P3) is stable at the set pressure, and regulating valve 8 is preferably between 50% and 70%. After adjustment, record the positions of adjusting valve 2 and regulating valve 8 of regulating unit #45, and then adjust adjusting valve 2 and regulating valve 8 of other regulating units #32 to #61 to the same position. At this time, observe the readings of pressure gauges 10 (P1) to 10 (P4) again. If the deviation from the set value is not large, start automatic adjustment. This method is adopted because, under normal circumstances, the resistance of the gas heating pipelines in each combustion chamber is basically the same, or at least the resistance of the gas heating pipelines in each combustion chamber is basically the same in the first half and the second half of the gas heating process. Before the automatic adjustment is put into use, the initial value needs to be set manually, which involves a certain amount of work. The more pressure gauges are set, the more accurate the adjustment will be, but the more work will be done before the automatic adjustment is put into use. Therefore, the configuration scheme shown in Figure 5 is usually sufficient. If conditions permit, it is better to use the scheme of remote pressure gauge configuration shown in Figure 4.

[0060] The pressure setpoint P can be calculated using the following formula:

[0061]

[0062] In formula ①, P0 is the design pressure of the main heating gas pipeline, and K is the orifice plate resistance coefficient, which is related to the size of the orifice plate and the heating gas pipeline and can be obtained by referring to a table. The density of gas under standard conditions. The design value of the gas branch pipe flow velocity, where t is the gas temperature.

[0063] This invention connects a heated gas pipeline and a gas regulating branch pipe in parallel. The heated gas pipeline is equipped with a regulating cock, an orifice plate box, and an exchange cock in sequence, ensuring the independence of manual regulation. The gas regulating branch pipe is equipped with a regulating valve, enabling automatic and precise regulation of the gas flow rate. The orifice plate box contains various orifice plates with different diameters to meet the needs of both manual and automatic regulation. Through the configuration of pressure measuring points and temperature regulation, the temperature of the mixed gas combustion chamber can be automatically regulated, ensuring uniform temperature in the straight line. Using configuration 1, temperature-pressure cascade regulation is adopted, enabling rapid and continuous adjustment of the temperature of each combustion chamber. Traditional manual regulation methods are retained, and the automatic regulation scheme does not affect traditional manual regulation. In case of valve failure, manual regulation can be switched at any time. The structure is simple and easy to operate. It significantly reduces the amount of manual work in the dangerous area of ​​the coke oven basement, reduces labor costs, and contributes to the health and safety of maintenance personnel.

Claims

1. A method for temperature regulation in a single-hole combustion chamber heated by mixed gas, characterized in that, include: S11, Orifice Plate Application Different diameter perforated plates in the perforated plate box are used during normal production, during normal production near the side furnace, during normal production near the side furnace, during extended coking time, during extended coking time near the side furnace, during extended coking time near the side furnace, and during the transition from oven drying to normal heating. S12, Pressure Transmitter Configuration Configuration 1: Each regulating unit uses a remote pressure transmitter, and each combustion chamber uses a temperature-pressure cascade regulation method to control the regulating valve; Configuration 2: The pressure transmitters of the first regulating unit near the side furnace and the last regulating unit near the other side furnace are remote pressure transmitters. The pressure transmitters of the regulating units in the first half and the second half of the mixed heating gas main pipe are remote pressure transmitters. The regulating valves of each combustion chamber are controlled by temperature regulation. Choose either configuration 1 or configuration 2.

2. The method for temperature regulation of a single-hole combustion chamber heated by mixed gas according to claim 1, characterized in that, In S11, the contents of the orifice plate box are as follows: Number the orifice plates in the orifice plate box from 1 to 7 according to their diameter from smallest to largest. When using manual adjustment of the regulating valve, the regulating plug is opened to the fully open position. The numbered orifice plate 1 is used for the side furnace when extending the coking time; the numbered orifice plate 2 is used when switching from oven drying to normal heating; the numbered orifice plate 3 is used for the side furnace during normal production; the numbered orifice plate 4 is used for the side furnace when extending the coking time; the numbered orifice plate 5 is used for extending the coking time; the numbered orifice plate 6 is used for the side furnace during normal production; and the numbered orifice plate 7 is used during normal production. When using an automatic regulating valve, the orifice plate boxes near the first regulating unit and the last regulating unit of the side stove use orifice plate number 1, while the orifice plate boxes of other regulating units all use orifice plate number 5.

3. The method for temperature regulation of a single-hole combustion chamber heated by mixed gas according to claim 1, characterized in that, In configuration 1, the temperature-pressure cascade regulation method for controlling the regulating valve is as follows: the difference between the measured temperature and the target temperature is used as the regulation input of the main regulating unit of the cascade regulating valve; the deviation between the output of the main regulating unit of the cascade regulating valve and the measured value of the pressure transmitter is used as the input of the secondary regulating unit of the cascade regulating valve; the output of the secondary regulating unit of the cascade regulating valve is transmitted to the regulating valve; the measured temperature is taken as the average value of the temperatures of two adjacent combustion chambers.

4. The method for temperature regulation of a single-hole combustion chamber heated by mixed gas according to claim 1, characterized in that, In configuration 2, each combustion chamber uses a temperature regulation method to control the regulating valve. Before switching from manual to automatic regulation, the following steps are taken: S21, Replace the orifice plate, that is, the orifice plate boxes near the first and last adjustment units of the side stove use the number 1 orifice plate, and the orifice plate boxes of other adjustment units all use the number 5 orifice plate, and adjust the adjustment valve in each adjustment unit to the same opening degree. S22, adjust the opening of the regulating cock and regulating valve of the first regulating unit near the side stove so that the reading of the pressure transmitter of the first regulating unit is stable at the set pressure and the regulating valve is at a suitable opening. S23, adjust the opening of the regulating cock and regulating valve of the regulating unit equipped with a remote pressure transmitter in the first half of the heating gas main pipe so that the reading of the remote pressure transmitter is stable at the set pressure and the regulating valve is at a suitable opening. Record the position of the regulating cock and regulating valve of the regulating unit. Then, adjust the opening of the regulating cock and regulating valve of the regulating unit without a remote pressure transmitter in the first half of the heating gas main pipe to the same position. S24. Adjust the opening of the regulating valve and regulating cock of the regulating unit equipped with a remote pressure transmitter in the latter half of the heating gas main pipe so that the reading of the remote pressure transmitter is stable at the set pressure and the regulating valve is at a suitable opening. Record the position of the regulating valve and regulating cock of the regulating unit. Then, adjust the opening of the regulating valve and regulating cock of the regulating unit without a remote pressure transmitter in the latter half of the heating gas main pipe to the same position. S25, adjust the opening of the regulating cock and regulating valve of the last regulating unit near the side stove on the other side, so that the reading of the pressure transmitter is stable at the set pressure and the regulating valve is at a suitable opening. S26. Re-observe the readings of each pressure transmitter. If the deviation from the set pressure is not significant, then activate automatic adjustment; otherwise, repeat S22~S25.

5. The method for temperature regulation of a single-hole combustion chamber heated by mixed gas according to claim 4, characterized in that, The appropriate opening range is 50-70%.

6. The method for temperature regulation of a single-hole combustion chamber heated by mixed gas according to claim 7, characterized in that, The set pressure is given by the following formula: ； In formula ①, P is the set pressure, P0 is the design pressure of the main heating gas pipeline, and K is the orifice plate resistance coefficient. The density of gas under standard conditions. t represents the design value of the gas branch pipe flow velocity, and t represents the gas temperature.

7. A temperature control system for a single-hole combustion chamber heated by mixed gas for implementing the method described in claims 1-6, characterized in that, It includes regulating units, one end of which is connected to the main pipe of the mixed heating gas, and the other end of which is connected to the corresponding exhaust gas switch, so that the mixed gas passes through the main pipe of the mixed heating gas, the corresponding regulating unit, the corresponding exhaust gas switch, and the corresponding heat storage chamber in sequence before entering the corresponding combustion chamber.

8. The temperature control system for a single-hole combustion chamber heated by mixed gas according to claim 7, characterized in that, A single-sided heated coke oven has N+1 regulating units, while a double-sided heated coke oven has 2N+2 regulating units, where N is the number of combustion chambers.

9. The temperature control system for a single-hole combustion chamber heated by mixed gas according to claim 7, characterized in that, The regulating unit includes a heating gas pipeline and a gas regulating branch pipe. The heating gas pipeline and the gas regulating branch pipe are connected in parallel. The heating gas pipeline is equipped with a regulating cock, an orifice box, and an exchange cock in sequence. The gas regulating branch pipe is equipped with a regulating valve. The pipeline connection of the exchange cock and the orifice box is connected to the other end of the regulating valve. The input end of the regulating cock is connected to one end of the regulating valve.

10. A mixed gas heating single-hole combustion chamber temperature control system according to claim 9, characterized in that, The output end of the exchange cock is equipped with a pressure transmitter; the orifice plate box is equipped with a variety of orifice plates of different sizes, with ≥7 types of orifice plates.

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