Mixed gas heating single-hole combustion chamber temperature adjusting method and system

Abstract

The invention relates to the technical field of coke oven heating, in particular to a mixed gas heating single-hole combustion chamber temperature adjusting method and system. The system comprises adjusting units, one end of each adjusting unit is connected with a mixed heating coal gas main pipe, and the other end of each adjusting unit is connected with a corresponding waste gas shutter. And the mixed coal gas sequentially passes through the mixed heating coal gas main pipe, the corresponding adjusting unit, the corresponding waste gas opening and closing device and the corresponding heat storage chamber to enter the corresponding combustion chamber. The device has the advantages that the heating gas pipeline is connected with the gas adjusting branch pipe in parallel, and the adjusting cock, the pore plate box and the exchange cock are sequentially arranged on the heating gas pipeline, so that the independence of manual adjustment is ensured; a regulating valve is arranged on the gas regulating branch pipe, so that the gas flow can be automatically and accurately regulated; and various pore plates with different diameters are arranged in the pore plate box, so that the requirements of manual adjustment and automatic adjustment can be met.

Description

Technical Field

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

[0002] At present, coke ovens are mainly divided into single-heat type and reheat type. Single-heat type coke ovens are mainly heated by coke oven gas, and reheat type coke ovens are mainly heated by mixed gas. In particular, steel joint enterprises mainly use a mixture of blast furnace gas and coke oven gas for heating. At present, there are many studies on the automatic temperature adjustment technology of the combustion chamber heated by coke oven gas, and it has been put into use in many coking enterprises, but the automatic temperature adjustment technology of the combustion chamber heated by mixed gas is still in a blank stage. The main reason is that the calorific value of coke oven gas is stable, and the coke oven gas heating pipeline is directly connected to the combustion chamber. The combustion chamber and the gas heating pipeline are in a one-to-one correspondence, so the regulating valve can be directly used to continuously adjust the combustion chamber temperature. The mixed gas has a low calorific value and a large fluctuation in calorific value. Its heating characteristics are that the heating gas pipeline first enters the gas regenerator through the exhaust gas switch, and then is connected to the combustion chamber through the regenerator. If the combustion chamber temperature is to be automatically adjusted, each combustion chamber will be controlled by the regulating valve on the two adjacent gas pipelines at the same time, which is complicated to control. Summary of the invention

[0003] The purpose of the present invention is to provide a temperature regulation method and system for a single-hole combustion chamber heated by mixed coal gas, by adding a regulation unit between the exhaust gas switch and the mixed coal gas main pipe, thereby improving the temperature stability of each combustion chamber when the mixed coal gas is heated.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A method for regulating the temperature of a single-hole combustion chamber heated by mixed coal gas, comprising:

[0006] S11, Orifice Plate Application

[0007] Different orifice plate diameters in the orifice plate box are used in normal production, used near the side furnace in normal production, used near the side furnace in normal production, used when the coking time is extended, used near the side furnace when the coking time is extended, used near the side furnace when the coking time is extended, and used when the oven is finished and switched to normal heating;

[0008] S12, Pressure transmitter configuration

[0009] Configuration 1: The pressure transmitter of each regulating unit adopts a remote pressure transmitter, and each combustion chamber adopts 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 one regulating unit are respectively selected in the front half and the rear half of the mixed heating gas main to adopt remote pressure transmitters. Each combustion chamber adopts the temperature regulation method to control the regulating valve;

[0011] Choose either configuration 1 or configuration 2.

[0012] In S11, the orifice box has the following contents:

[0013] The orifice plates in the orifice plate box are numbered 1 to 7 in order from small to large according to the orifice plate diameter;

[0014] When the regulating valve is manually adjusted, the regulating plug is opened to the fully open state. Orifice plate No. 1 is used for the side furnace when the coking time is extended, orifice plate No. 2 is used when the oven is finished and the oven is switched to normal heating, orifice plate No. 3 is used for the side furnace during normal production, orifice plate No. 4 is used for the side furnace when the coking time is extended, orifice plate No. 5 is used when the coking time is extended, orifice plate No. 6 is used for the side furnace during normal production, and orifice plate No. 7 is used during normal production;

[0015] When an automatic regulating valve is used, the orifice box of the first regulating unit close to the side furnace and the last regulating unit close to the side furnace uses orifice plate numbered 1, and the orifice boxes of other regulating units all use orifice plates numbered 5.

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

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

[0018] S21, replace the orifice plate, that is, the orifice plate boxes of the first regulating unit near the side furnace and the last regulating unit near the side furnace use orifice plate numbered 1, and the orifice plate boxes of other regulating units all use orifice plates numbered 5, and adjust the regulating valves in each regulating unit to the same opening;

[0019] S22, adjust the opening of the regulating plug and regulating valve of the first regulating unit close to the side furnace 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 an appropriate opening;

[0020] S23, adjusting the opening of the regulating plug and regulating valve of the regulating unit with the remote pressure transmitter in the front 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 an appropriate opening, recording the opening position of the regulating plug and regulating valve of the regulating unit, and adjusting the opening of the regulating plug and regulating valve of the regulating unit without the remote pressure transmitter in the front half of the heating gas main pipe to the same position in turn;

[0021] S24, adjusting the opening of the regulating plug and regulating valve of the regulating unit equipped with the remote pressure transmitter in the rear 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 an appropriate opening, recording the opening position of the regulating plug and regulating valve of the regulating unit, and adjusting the opening of the regulating plug and regulating valve of the regulating unit in the rear half of the heating gas main pipe without the remote pressure transmitter to the same position in turn;

[0022] S25, adjust the opening of the regulating plug and regulating valve of the last regulating unit near the side furnace on the other side, so that the reading of the pressure transmitter is stable at the set pressure and the regulating valve is at an appropriate opening;

[0023] S26, re-observe the reading of each pressure transmitter. If the deviation from the set pressure is not large, put it into automatic adjustment. Otherwise, repeat S22 to S25.

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

[0025] Set the pressure using the following formula:

[0026]

[0027] In formula ①, P is the set pressure, P0 is the design value of the heating gas main pipeline pressure, K is the orifice resistance coefficient, ρ0 is the gas density under standard conditions, w0 is the design value of the gas branch flow velocity, and t is the gas temperature.

[0028] A temperature regulating system for a mixed coal gas heated single-hole combustion chamber comprises regulating units, one end of each regulating unit is respectively connected to a mixed heating coal gas main pipe, and the other end of each regulating unit is connected to a corresponding exhaust gas switch, so that the mixed coal gas passes through the mixed heating coal gas main pipe, the corresponding regulating unit, the corresponding exhaust gas switch, and the corresponding heat storage chamber in sequence and enters the corresponding combustion chamber.

[0029] The coke oven with single-side heating is provided with N+1 regulating units, and the coke oven with double-side heating is provided with 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 provided with a regulating plug, an orifice box and an exchange plug in sequence. The gas regulating branch pipe is provided with a regulating valve. The pipeline connection of the exchange plug and the orifice box is connected to the other end of the regulating valve, and the input end of the regulating plug is connected to one end of the regulating valve.

[0031] A pressure transmitter is provided at the output end of the exchange cock; a variety of orifice plates with different sizes are provided in the orifice box, with ≥7 types of orifice plates. For the side furnaces and side furnaces of the coke ovens with single-side heating, the number of orifice plates used is >2, and the number of the remaining orifice plates is >N-3; for the side furnaces and side furnaces of the coke ovens with double-side heating, the number of orifice plates used is ≥4, and the number of the remaining orifice plates is >2N-6.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The heating gas pipeline is connected in parallel with the gas regulating branch pipe. The heating gas pipeline is provided with regulating cocks, orifice boxes and exchange cocks in sequence, which ensures the independence of manual regulation. The gas regulating branch pipe is provided with regulating valves, which can realize automatic and precise regulation of gas flow.

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

[0035] 3. Through the configuration of pressure measuring points and temperature adjustment, the temperature of the mixed gas combustion chamber can be automatically adjusted to ensure the uniformity of straight-line temperature;

[0036] 4. Adopting configuration 1, using temperature-pressure cascade regulation, the temperature of each combustion chamber can be adjusted quickly and continuously;

[0037] 5. The traditional manual adjustment method is retained. 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 greatly reduces the amount of manual work in dangerous areas of the coke oven basement, reduces labor costs, and contributes to the health and safety of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of a mixed gas single-hole combustion chamber adjustment unit.

[0040] Figure 2 It is the combustion chamber temperature-pressure cascade control flow chart of the current exchange cycle.

[0041] Figure 3 It is the combustion chamber temperature-pressure cascade control flow chart for the next exchange cycle.

[0042] Figure 4 It is a layout diagram of pressure measuring points for configuration one.

[0043] Figure 5 This is the layout diagram of the pressure measurement points for configuration option 2.

[0044] In the figure: 1-mixing heating gas main pipe 2-regulating cock 3-orifice box 4-exchange cock 5-gas regulating branch pipe 6-stop valve A 7-stop valve B 8-regulating valve 9-stop valve C 10-pressure transmitter. DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with 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 examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0047] Example 1

[0048] A coking plant uses a 60-hole carbonization chamber reheating single-side heating coke oven, with a total of 61 combustion chambers, which are numbered 1 to 61#; the entire heating gas regulation system needs to be equipped with 62 sets of single-hole combustion chamber regulation units, which are numbered 1# to 62#; one end of each regulation unit is connected to the mixed heating gas main, 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 through the mixed heating gas main, the corresponding regulation unit, the corresponding exhaust gas switch, and the corresponding heat storage chamber in turn into the corresponding combustion chamber.

[0049] Single-hole combustion chamber adjustment unit Figure 1Each regulating unit includes a heating gas pipeline 1 and a gas regulating branch pipe 5. The heating gas pipeline 1 is connected in parallel with the gas regulating branch pipe 5. The heating gas pipeline is provided with a regulating cock 2, an orifice box 3, and an exchange cock 4 in sequence. The regulating cock 2 is provided with a scale indicator, and the opening position of the cock can be seen during adjustment. The scale range is 0 to 90°. The gas regulating branch pipe 5 is provided with a stop valve (A) 6, a regulating valve 8, and a stop valve (B) 7 in sequence. The regulating valve 8 is a pneumatic regulating valve, and a pneumatic single-seat regulating valve, a gas regulating valve, or a gas regulating valve can be selected. The low load regulating butterfly valve and pneumatic V-type regulating ball valve are used. The normal regulating flow of the regulating valve is the difference between the normal heating gas flow of each branch pipe and the extended coking time gas flow. When selecting the size and form of the regulating valve, it is ensured that the opening of the selected regulating valve is between 50° and 70° under the normal regulating gas flow q0. The regulating valve also needs to have the function of holding the cut-off signal. The connection between the exchange cock 4 and the orifice 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. There are 7 sizes of orifice plates in the orifice box 3, which are used in normal production, side furnace during normal production, side furnace during normal production, extended coking time, side furnace during extended coking time, side furnace during extended coking time, and when the oven is finished and switched to normal heating; the sizes of the orifice plates in the orifice box 3 are numbered 1 to 7 from small to large, and the corresponding sizes are D1 to D7 from small to large.

[0050] A method for regulating the temperature of a single-hole combustion chamber heated by mixed coal gas, the contents of which are as follows:

[0051] 1) Use of orifice plate

[0052] When manually adjusting the regulating valve or inspecting the regulating valve, close the stop valve A (6), stop valve (B) 7, stop valve C (9), and adjust the plug 2 to the fully open state; at this time, the orifice plate in the orifice plate box is set as follows:

[0053] Orifice plate No. 1 is used at the side furnace when the coking time is extended, orifice plate No. 2 is used when the furnace is finished and switched to normal heating, orifice plate No. 3 is used at the side furnace during normal production, orifice plate No. 4 is used close to the side furnace when the coking time is extended, orifice plate No. 5 is used to extend the coking time, orifice plate No. 6 is used close to the side furnace during normal production, and orifice plate No. 7 is used during normal production.

[0054] When automatic regulation is adopted, the stop valve A (6) and the stop valve (B) 7 are opened, and the orifice plate No. 1 is used in the orifice plate box 3 of the 1# regulating unit near the side furnace and the 62# regulating unit near the side furnace on the other side, and the orifice plate No. 5 is used in the orifice plate box 3 of the 2# to 61# regulating units;

[0055] The reason for selecting a smaller orifice plate (for extended coking) during automatic adjustment is that the heating gas flow rate is larger during normal heating of the coke oven, and smaller during extended coking, and the difference between the two flow rates is the flow rate range that the regulating valve 8 needs to automatically adjust. Since the regulating valve 8 is connected in parallel with the orifice box 3, when the regulating valve (8) is fully closed, it is equivalent to the gas flow rate during extended coking, and when the regulating valve 8 is opened to a certain degree, the flow rate returns to the state during normal production. If it is to be ensured that the flow rate is also in an adjustable state during extended coking, the opening of the regulating cock 2 should generally be reduced.

[0056] 2) Pressure transmitter configuration

[0057] Configuration 1, Figure 4 , the content is as follows:

[0058] A remote pressure transmitter is provided behind the exchange cock 4 in the 1-62# single-hole combustion chamber temperature adjustment unit. Figure 2 and Figure 3 , which is the working mode of the temperature regulation system for heating a single-hole combustion chamber with mixed coal gas and the temperature-pressure cascade regulation scheme for a single-hole combustion chamber adopted by the present invention. The heating method of the mixed coal gas is that the heated coal gas passes through the coal gas regulation unit, the exhaust gas switch, and the potential storage chamber into the combustion chamber. Since the heated coal gas in each heat storage chamber enters the two adjacent combustion chambers at the same time, each regulation unit will control the temperature of the two combustion chambers at the same time in one exchange cycle; and the exchange cocks 4 of the two adjacent regulation units will open and close alternately with the change of the exchange cycle. See Figure 2 , in the first exchange cycle, the exchange cock 4 of the N# regulating unit is opened, at this time, the PLC / DCS control system selects the switch HSn to be 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 sub-regulating unit, and the output of the sub-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. Figure 3When the next exchange cycle begins, the exchange cock 4 of the N# regulating unit is closed, the heating gas is cut off, and the selection switch HSn is disconnected (the selection switch HSn is set in the control system), the N# regulating valve 8 loses the control signal and will no longer participate in the regulation. Since the regulating valve 8 has the function of maintaining the broken signal, it will maintain the opening at the end of the previous exchange cycle; and the exchange cock 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 perform PID cascade regulation based on 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 delayed combustion chamber temperature change and realize rapid, continuous and precise regulation of the temperature of a single-hole combustion chamber.

[0059] Configuration 2, Figure 5 , the content is as follows:

[0060] A pressure gauge 10 (P1) and a pressure gauge 10 (P4) are respectively set in the 1# regulating unit and the 62# regulating unit; a pressure gauge 10 (P2) is set behind the exchange cock 4 of one regulating unit (such as 15#) selected in 2# and 31#, representing the pressure of each heating gas branch pipe in the front half of the heating gas main; a pressure gauge 10 (P3) is set behind the exchange cock 4 of one regulating unit (such as 45#) selected in the 32# heating gas pipeline regulating unit and the 62# heating gas pipeline regulating unit, representing the pressure of each heating gas branch pipe in the back half of the heating gas main. The reason why the 1# regulating unit and the 62# regulating unit are set separately is that the temperature fluctuation of the side combustion chamber is large, and the amount required for adjustment is relatively large compared with other combustion chambers, so they need to be considered independently; the function of the on-site pressure gauge is mainly used to set the initial opening of the regulating valve 8 and the regulating cock 2 before the automatic adjustment. Due to the large hysteresis of the combustion chamber temperature change, if the initial opening is not set reasonably, automatic adjustment will be difficult to achieve. Therefore, before automatic adjustment is started, the orifice plate of the required size for automatic adjustment must be replaced first. 1# and 62# use orifice plate numbered 1, and 2# to 61# use orifice plate numbered 5. For 1# and 62# adjustment units, adjust the opening of the adjusting cock 2 and the adjusting valve 8 according to the readings of the pressure gauge 10 (P1) and the pressure gauge 10 (P4), so that the pressure gauge 10 (P1) and the pressure gauge 10 (P4) are stable at the set pressure, and the adjusting valve 8 is preferably between 50% and 70%. For 2# to 31# adjustment units, adjust the opening of the adjusting cock 2 and the adjusting valve 8 according to the reading of the pressure gauge 10 (P2) of the 15# adjustment unit, so that the pressure gauge 10 (P2) is stable at the set pressure, and the adjusting valve 8 is preferably between 50% and 70%. After adjustment, record the position of the adjusting cock 2 and the adjusting valve 8 of the 15# adjusting unit, and adjust the adjusting cock 2 and the adjusting valve 8 of the other adjusting units 2 to 31# to the same position in turn; for the adjusting units 32 to 61#, adjust the opening of the adjusting cock 2 and the adjusting valve 8 according to the reading of the pressure gauge 10 (P3) of the 45# adjusting unit, so that the pressure gauge 10 (P3) is stabilized at the set pressure, and the adjusting valve 8 is preferably between 50% and 70%; after adjustment, record the position of the adjusting cock 2 and the adjusting valve 8 of the 45# adjusting unit, and adjust the adjusting cock 2 and the adjusting valve 8 of the other adjusting units 32 to 61# to the same position in turn. At this time, re-observe the readings of the pressure gauge 10 (P1) to the pressure gauge 10 (P4). 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 heating gas pipelines of each combustion chamber is basically the same, or at least the resistance of the heating gas pipelines of each combustion chamber is basically the same in the first half and the second half of the heating gas. Before the automatic adjustment is put into use, the initial value needs to be set manually, which has a certain workload. The more pressure gauges are set, the more accurate the adjustment is, but the more work before automatic operation is also greater. Therefore, it is usually adopted Figure 5 If conditions permit, it is better to use Figure 4The best solution is to configure a remote pressure gauge.

[0061] The pressure setting value P can be calculated as follows:

[0062]

[0063] In formula ①, P0 is the design value of the heating gas main pipeline pressure, 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 looking up the table. ρ0 is the gas density under standard conditions, w0 is the design value of the gas branch flow rate, and t is the gas temperature.

[0064] The heating gas pipeline of the present invention is connected in parallel with the gas regulating branch pipe, and the heating gas pipeline is provided with a regulating cock, an orifice box and an exchange cock in sequence, thereby ensuring the independence of manual regulation; the gas regulating branch pipe is provided with a regulating valve, which can realize automatic and accurate regulation of the gas flow rate; the orifice box is provided with a variety of orifice plates with different diameters, which can meet the needs of manual regulation and automatic regulation; through the configuration of pressure measuring points and temperature regulation, the automatic regulation of the temperature of the mixed gas combustion chamber can be realized, and the straight-line temperature uniformity can be ensured; the configuration 1 is adopted, and the temperature-pressure cascade regulation is adopted, so that the temperature of each combustion chamber can be quickly and continuously adjusted; the traditional manual regulation means are retained, and the automatic regulation scheme will not affect the traditional manual regulation. When the regulating valve fails, it can be switched to manual regulation at any time, and the structure is simple and the operation is convenient; the manual work in the dangerous area of ​​the coke oven basement is greatly reduced, the labor cost is reduced, and the health and safety of maintenance personnel are contributed to.

Claims

1. A method for regulating the temperature of a single-hole combustion chamber heated by mixed coal gas, characterized in that: include: S11, Orifice Plate Application Different orifice plate diameters in the orifice plate box are used in normal production, used near the side furnace in normal production, used near the side furnace in normal production, used when the coking time is extended, used near the side furnace when the coking time is extended, used near the side furnace when the coking time is extended, and used when the oven is finished and switched to normal heating; S12, Pressure transmitter configuration Configuration 1: The pressure transmitter of each regulating unit adopts a remote pressure transmitter, and each combustion chamber adopts 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 one regulating unit are respectively selected in the front half and the rear half of the mixed heating gas main to adopt remote pressure transmitters. Each combustion chamber adopts the temperature regulation method to control the regulating valve; Choose either Configuration 1 or Configuration 2.

2. The temperature adjustment method for a single-hole combustion chamber heated by mixed coal gas according to claim 1, characterized in that: In S11, the orifice box has the following contents: The orifice plates in the orifice plate box are numbered 1 to 7 in order from small to large according to the orifice plate diameter; When the regulating valve is manually adjusted, the regulating plug is opened to the fully open state. Orifice plate No. 1 is used for the side furnace when the coking time is extended, orifice plate No. 2 is used when the oven is finished and the oven is switched to normal heating, orifice plate No. 3 is used for the side furnace during normal production, orifice plate No. 4 is used for the side furnace when the coking time is extended, orifice plate No. 5 is used when the coking time is extended, orifice plate No. 6 is used for the side furnace during normal production, and orifice plate No. 7 is used during normal production; When an automatic regulating valve is used, the orifice box of the first regulating unit close to the side furnace and the last regulating unit close to the side furnace uses orifice plate numbered 1, and the orifice boxes of other regulating units all use orifice plates numbered 5.

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

4. The temperature adjustment method for a single-hole combustion chamber heated by mixed coal gas according to claim 1, characterized in that: In configuration 2, each combustion chamber uses a temperature adjustment method to control the regulating valve, and the following steps are taken before manual to automatic adjustment: S21, replace the orifice plate, that is, the orifice plate boxes of the first regulating unit near the side furnace and the last regulating unit near the side furnace use orifice plate numbered 1, and the orifice plate boxes of other regulating units all use orifice plates numbered 5, and adjust the regulating valves in each regulating unit to the same opening; S22, adjust the opening of the regulating plug and regulating valve of the first regulating unit close to the side furnace 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 an appropriate opening; S23, adjusting the opening of the regulating plug and regulating valve of the regulating unit with the remote pressure transmitter in the front 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 an appropriate opening, recording the opening position of the regulating plug and regulating valve of the regulating unit, and adjusting the opening of the regulating plug and regulating valve of the regulating unit without the remote pressure transmitter in the front half of the heating gas main pipe to the same position in turn; S24, adjusting the opening of the regulating plug and regulating valve of the regulating unit equipped with the remote pressure transmitter in the rear 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 an appropriate opening, recording the opening position of the regulating plug and regulating valve of the regulating unit, and adjusting the opening of the regulating plug and regulating valve of the regulating unit in the rear half of the heating gas main pipe without the remote pressure transmitter to the same position in turn; S25, adjust the opening of the regulating plug and regulating valve of the last regulating unit near the side furnace on the other side, so that the reading of the pressure transmitter is stable at the set pressure and the regulating valve is at an appropriate opening; S26, re-observe the reading of each pressure transmitter, if the deviation from the set pressure is not large, put it into automatic adjustment, otherwise repeat S22 to S25.

5. The temperature adjustment method for a single-hole combustion chamber heated by mixed coal gas according to claim 4 is characterized in that: The suitable opening range is 50-70%.

6. A method for regulating the temperature of a single-hole combustion chamber heated by mixed coal gas according to claim 7, characterized in that: The set pressure is as follows: In formula ①, P is the set pressure, P0 is the design value of the heating gas main pipeline pressure, K is the orifice resistance coefficient, ρ0 is the gas density under standard conditions, w0 is the design value of the gas branch flow rate, and t is the gas temperature.

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

8. A mixed gas heating single-hole combustion chamber temperature regulating system according to claim 7, characterized in that: The coke oven with single-side heating is provided with N+1 regulating units, and the coke oven with double-side heating is provided with 2N+2 regulating units, where N is the number of combustion chambers.

9. A mixed gas heating single-hole combustion chamber temperature regulating system according to claim 7, characterized in that: The regulating unit comprises 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 provided with a regulating cock, an orifice box and an exchange cock in sequence, and the gas regulating branch pipe is provided 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, and 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 regulating system according to claim 9, characterized in that: The output end of the exchange cock is provided with a pressure transmitter; the orifice plate box is provided with a plurality of orifice plates with different sizes, and the types of orifice plates are ≥7.

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