Temperature control device for coke oven gas heating combustion chamber

Abstract

The utility model relates to the technical field of coke oven heating, in particular to a coke oven gas heating combustion chamber temperature control device, which is characterized in that a gas header pipe adjusting unit is arranged at the front end of a single-hole combustion chamber adjusting unit and is connected with a coke oven gas main pipe, and each single-hole combustion chamber adjusting unit is connected with the coke oven gas main pipe; the output end of each single-hole combustion chamber adjusting unit is connected with the corresponding combustion chamber. And the gas main pipe adjusting unit comprises an adjusting valve C, a flow meter and a pressure transmitter, and the adjusting valve C, the flow meter and the pressure transmitter are sequentially arranged on the coke oven gas main pipe. The utility model has the advantages that: the regulating valve and the bypass regulating valve can completely replace the function of a pore plate box, so that the risk that a worker works in a dangerous area such as a gas basement is reduced; the loop A of the first adjusting branch pipe and the loop B of the second adjusting branch pipe are standby for each other, when one loop breaks down, the loop can be switched to the standby loop at any time, and the flow stability of heating gas is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coke oven heating technical field especially relates to a coke oven gas heating combustion chamber temperature control device. BACKGROUND

[0002] In the metallurgical industry production, utilize the coke oven gas heating mode to the coke oven heating, set up flow regulation and pressure alarm interlock in the coke oven gas main pipe to guarantee the coke oven gas pressure stability, and the temperature control of combustion chamber is mainly realized through the manual replacement coke oven heating gas branch pipe orifice plate box.

[0003] Reserve orifice plate box, once the orifice plate box adopts the orifice plate size of conventional design, the regulating valve will be in the full open state, completely lose the regulation effect, equivalent to a switch valve, therefore can only special order large size orifice plate or cancel orifice plate box, and the regulating valve can play the regulation effect, even so, since the regulating valve is directly installed on the combustion chamber heating gas branch pipe, with the mainstream 7m coke oven, 6.25 ramming coke oven as an example, the regulating valve size is usually DN100~DN125, therefore the regulating valve flow capacity is too big, and every change 1 will cause the furnace temperature to change greatly, and the combustion chamber temperature control effect is not good. SUMMARY

[0004] The utility model discloses a kind of coke oven gas heating combustion chamber temperature control devices, replace the role of orifice plate box, no longer need manual replacement orifice plate, reduce labor intensity.

[0005] To achieve the above object, the utility model realizes by the following technical scheme:

[0006] A kind of coke oven gas heating combustion chamber temperature control device, including gas main pipe regulating unit and single-hole combustion chamber regulating unit, gas main pipe regulating unit is set in the front end of single-hole combustion chamber regulating unit, gas main pipe regulating unit is connected with coke oven gas main pipe, each single-hole combustion chamber regulating unit is connected with coke oven gas main pipe, and the output end of each single-hole combustion chamber regulating unit is connected with corresponding combustion chamber respectively;Gas main pipe regulating unit includes regulating valve C, flowmeter, pressure transmitter, regulating valve C, flowmeter, pressure transmitter are sequentially arranged on coke oven gas main pipe, and pressure transmitter is used to detect coke oven gas main pipe pressure.

[0007] Each single-hole combustion chamber adjusting unit comprises adjusting branch pipe one, adjusting branch pipe two, branch pipe a and branch pipe b, the input ends of the adjusting branch pipe one and the adjusting branch pipe two are connected with the coke oven gas main pipe respectively, the output ends of the adjusting branch pipe one and the adjusting branch pipe two are connected with the combustion chamber respectively; one end of the branch pipe a is connected with the adjusting branch pipe one, the other end of the branch pipe a is connected with the adjusting branch pipe two, one end of the branch pipe b is connected with the adjusting branch pipe one, the other end of the branch pipe b is connected with the adjusting branch pipe two.

[0008] The adjusting branch pipe one comprises adjusting cock A, adjusting valve A and exchange cock A connected in sequence from bottom to top, and the adjusting branch pipe two comprises adjusting cock B, adjusting valve B and exchange cock B connected in sequence from bottom to top;

[0009] The pipeline connection positions of the adjusting valve A and the exchange cock A are connected with one end of the branch pipe a, and the pipeline connection positions of the adjusting valve B and the exchange cock B are connected with the other end of the branch pipe a;

[0010] The pipeline connection positions of the adjusting valve A and the adjusting cock A are connected with one end of the branch pipe b, and the pipeline connection positions of the adjusting valve B and the adjusting cock B are connected with the other end of the branch pipe b; the branch pipe b comprises cut-off valve A and cut-off valve B connected in series, one end of the bypass adjusting valve is connected with the branch pipe a, and the pipeline connection positions of the cut-off valve A and the cut-off valve B are connected with the other end of the bypass adjusting valve.

[0011] Further comprising connecting rod, actuating mechanism, positioner, electromagnetic valve, self-locking valve and temperature sensor, the two ends of the connecting rod are connected with ball hinges respectively, the crank of the adjusting valve B is connected with the ball hinge at one end of the connecting rod, the crank of the adjusting valve A is connected with the ball hinge at the other end of the connecting rod, the actuating mechanism is connected with the adjusting valve B and is used for driving the adjusting valve B to act, the positioner is connected with the actuating mechanism, the output end of the electromagnetic valve is connected with the positioner, the gas inlet of the self-locking valve is connected with the gas source.

[0012] Further comprising temperature sensor, each temperature sensor is used for detecting the temperature of the combustion chamber.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. By arranging the adjusting valve and the bypass adjusting valve in each combustion chamber subsystem (i.e. each single-hole combustion chamber adjusting unit), the function of the orifice plate box can be completely replaced, and manual replacement of the orifice plate is no longer needed, thereby reducing the labor intensity and reducing the risk of workers working in the dangerous area such as the coal gas basement;

[0015] 2. The subsystem comprises adjusting branch pipe one and adjusting branch pipe two, the output ends of the adjusting branch pipe one and the adjusting branch pipe two are connected with the combustion chamber respectively, the loop A of the adjusting branch pipe one and the loop B of the adjusting branch pipe two are mutual standby, when one of them fails, the standby loop can be switched at any time, and the stability of the heating gas flow is improved.

[0016] 3、In the adjustment branch pipe one and adjustment branch pipe two of the subsystem are respectively provided with adjustment valve A and adjustment valve B, and a bypass adjustment valve is arranged between branch pipe a and branch pipe b, and through the adjustment of the heating gas adjustment branch pipe adjustment valve, the coarse adjustment of the heating gas can be realized, and through the adjustment of the bypass adjustment valve on the bypass flow of the heating gas, the temperature adjustment effect of the combustion chamber is improved;

[0017] 4、The two ends of the connecting rod are respectively connected with ball hinges, the crank of the adjustment valve B is connected with the ball hinge at one end of the connecting rod, and the crank of the adjustment valve A is connected with the ball hinge at the other end of the connecting rod, so that the adjustment valve A and the adjustment valve B can act together with the actuator and keep the same opening degree, and the structure is simple and the cost is saved;

[0018] 5、In the process of adjusting the temperature of the combustion chamber, the combustion chamber temperature acts on the adjustment branch pipe adjustment valve and the bypass adjustment valve respectively, so that the opening degree of the branch pipe adjustment valve is prevented from changing greatly, the frequency of the opening degree change of the adjustment branch pipe adjustment valve is reduced, the stability of the pressure of the coke oven gas main pipe and the temperature of the combustion chamber is ensured, the structure is simple, and the maintenance is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Configuration diagram of automatic control system for coke oven gas heating system

[0020] Figure 2 Structure schematic diagram of pneumatic adjustment butterfly valve

[0021] Figure 3 Process control flow chart of coke oven gas heating system

[0022] Figure 4 Automatic control logic flow chart of coke oven gas main pipe pressure.

[0023] Figure 5 Automatic control logic flow chart of single-hole combustion chamber temperature.

[0024] In the figure: 1-coke oven gas main pipe 2-adjustment valve C 3-flow meter 4-pressure transmitter 5-adjustment cock A 6-exchange cock A 7-adjustment valve A 8-adjustment cock B 9-adjustment valve B 10-exchange cock B 11-bypass adjustment valve 12-shutoff valve A 13-shutoff valve B 14-temperature measuring sensor 15-crank 16-ball hinge 17-connecting rod 18-actuator 19-positioner 20-solenoid valve 21-self-locking valve. DETAILED DESCRIPTION

[0025] The utility model will be described in detail below in combination with the drawings of the specification, but it should be pointed out that the implementation of the utility model is not limited to the following embodiments.

[0026] The following examples are implemented on the premise of the technical scheme of the present application, and detailed implementation modes and specific operation processes are given, but the protection scope of the present application is not limited to the following examples. The methods used in the following examples are all conventional methods unless otherwise specified.

[0027] Example 1

[0028] A coke oven gas heating combustion chamber temperature control device, see Figure 1 , a gas main pressure regulating unit and a single-hole combustion chamber temperature regulating unit, the gas main pressure regulating unit comprises a coke oven gas main pipe 1, a regulating valve C2, a flowmeter 3, and a pressure transmitter 4, the regulating valve C2, the flowmeter 3, and the pressure transmitter 4 are sequentially arranged on the coke oven gas main pipe 1, and the pressure transmitter 4 is used for detecting the pressure of the coke oven gas main pipe 1; the gas main pressure regulating unit is arranged at the front end of the single-hole combustion chamber temperature regulating unit. The single-hole combustion chamber temperature regulating unit is composed of multiple subsystems, the subsystems are all connected with the coke oven gas main pipe, the output ends of the subsystems are respectively connected with corresponding combustion chambers, the number of the subsystems is consistent with the number of the combustion chambers, a single single-hole combustion chamber temperature regulating unit comprises a regulating cock A5, an exchange cock A6, a regulating valve A7, a regulating cock B8, a regulating valve B9, an exchange cock B10, a bypass regulating valve 11, a stop valve A12, a stop valve B13, and a temperature measuring sensor 14, and the subsystems comprise a regulating branch pipe one, a regulating branch pipe two, a branch pipe a, and a branch pipe b; the regulating branch pipe one comprises the regulating cock A5, the regulating valve A7, and the exchange cock A6 which are sequentially connected from bottom to top, and the regulating branch pipe two comprises the regulating cock B8, the regulating valve B9, and the exchange cock B10 which are sequentially connected from bottom to top; the pipeline connection positions of the regulating valve A7 and the exchange cock A6 are connected with one end of the branch pipe a, and the pipeline connection positions of the regulating valve B9 and the exchange cock B10 are connected with the other end of the branch pipe a; the pipeline connection positions of the regulating valve A7 and the regulating cock A5 are connected with one end of the branch pipe b, and the pipeline connection positions of the regulating valve B9 and the regulating cock B8 are connected with the other end of the branch pipe b; the branch pipe b comprises the stop valve A12 and the stop valve B13 which are connected in series, one end of the bypass regulating valve is connected with the branch pipe a, and the pipeline connection positions of the stop valve A12 and the stop valve B13 are connected with the other end of the bypass regulating valve.

[0029] The regulating valve A7 and the regulating valve B8 are used for forming a pneumatic regulating valve, see Figure 2, including connecting rod 17, actuator 18, positioner 19, solenoid valve 20, self-locking valve 21, temperature sensor 14, both ends of connecting rod 17 are connected with ball hinge 16, crank 15 of regulating valve B9 is connected with ball hinge 16 at one end of connecting rod 17, crank 15 of regulating valve A7 is connected with ball hinge 16 at the other end of connecting rod 17, actuator 18 is connected with regulating valve B9 for driving regulating valve B9 to act, actuator 18 is single-acting cylinder, positioner 19 is connected with actuator 18, solenoid valve 20 is installed on air supply pipeline of positioner 19, positioner 19 is connected with output end of solenoid valve 20, input end of solenoid valve 20 is connected with air outlet of self-locking valve 21, air inlet of self-locking valve 21 is connected with air source, when solenoid valve is powered, air source is conducted, regulating valve A7 and regulating valve B9 work normally, solenoid valve 20 is powered off, air source is disconnected, regulating valve A7 and regulating valve B9 are kept through self-locking valve 21; each temperature sensor 14 is used for detecting combustion chamber temperature.

[0030] Working principle:

[0031] Flow regulation is adopted for coal gas main pressure regulating unit, flow meter 3 and pressure transmitter 4 are arranged behind regulating valve C2, flow meter 3 is used for flow regulation with regulating valve C2, pressure transmitter 4 is used for coal gas pressure lower limit alarm, lower lower limit alarm, interlock, lower lower lower limit alarm interlock, wherein lower lower lower limit alarm and interlock are process interlock, lower lower limit interlock is used for interlocking regulating valve A7 and regulating valve B9 to act.

[0032] The working states of the subsystem are as follows: in normal production, the regulating cock A5 is adjusted, the stop valve 12 is opened, the regulating cock B8 is adjusted, and the stop valve B13 is closed. At this time, the regulating cock B8, the regulating valve B9, and the stop valve B13 are standby. When the hydraulic exchanger is first operated, the exchange cock A6 is automatically opened, and the exchange cock B10 is closed. At this time, the regulating cock A5, the exchange cock A6, and the regulating valve A7 are connected as the main circuit, and the regulating is realized by the regulating valve A7. The regulating cock A5, the exchange cock A6, the bypass regulating valve 11, and the stop valve A12 are connected as the auxiliary circuit, and the regulating is realized by the bypass regulating valve 11. When the hydraulic exchanger is reversed after a period of time, the exchange cock A6 is automatically closed, and the exchange cock B10 is opened. At this time, the regulating cock A5, the regulating valve A7, and the exchange cock B10 are connected as the main circuit, and the regulating is realized by the regulating valve A7. The regulating cock A5, the exchange cock B10, the bypass regulating valve 11, and the stop valve A12 are connected as the auxiliary circuit, and the regulating is realized by the bypass regulating valve 11. When the regulating cock A5, the exchange cock A6, and the regulating valve A7 branch appear faults, the regulating cock A5 is closed, the stop valve 12 is opened, the regulating cock B8 is opened, and the stop valve B13 is closed. At this time, if the exchange cock A6 is opened and the exchange cock B8 is closed, the exchange cock A6, the regulating cock B8, and the regulating valve B9 are connected as the main circuit, and the regulating is realized by the regulating valve B9. The exchange cock A6, the regulating cock B8, the bypass regulating valve 11, and the stop valve B13 are connected as the auxiliary circuit, and the regulating is realized by the bypass regulating valve 11. Conversely, if the exchange cock A6 is closed and the exchange cock B8 is opened, the regulating cock B8, the regulating valve B9, and the exchange cock B10 are connected as the main circuit, and the regulating is realized by the regulating valve B9. The regulating cock B8, the exchange cock B10, the bypass regulating valve 11, and the stop valve A12 are connected as the auxiliary circuit, and the regulating is realized by the bypass regulating valve 11.

[0033] See Figures 3-5 , FV represents the regulating valve C2, FT represents the flowmeter 3, PT represents the pressure transmitter 4, XV represents the regulating valve A7 or the regulating valve B9, TV represents the bypass regulating valve 11, and TE represents the temperature sensor 14. Since one coke oven is composed of N combustion chambers, one coke oven gas heating combustion chamber temperature control device has N XVs, TVs, and TE, numbered as XV-1 to XV-N, TV-1 to TV-N, and TE-1 to TE-N.

[0034] See Figure 3The process control method of coke oven gas heating system is described, and the regulating valve FV is controlled by the flow meter FT. When the main gas pipe pressure shows normal, the HS-1-HS-N selector switch (HS-1-HS-N is set in the PLC / DCS control system) is turned on in the ac direction, and each main loop regulating valve XV-1-XV-N and bypass regulating valve TV-1-TV-N is controlled by the combustion chamber temperature sensor TE-1-TE-N, so that the XV, TV and TE constitute a single hole combustion chamber temperature automatic control system. When the main gas pipe pressure shows abnormal, the HS-1-HS-N selector switch is turned on in the ab direction, so that the XV-1-XV-N is controlled by the PT at the same time, and is no longer controlled by the TE-1-TE-N, but the TV-1-TV-N is always controlled by the TE-1-TE-N, so that the FT, FV, PT and XV-1-XV-N constitute a main gas pipe pressure automatic control system.

[0035] See Figure 4 The automatic control method of coke oven gas main pipe pressure is described, and the coke oven gas main pipe pressure and flow are mainly regulated by the regulating valve FV and flow meter of the coke oven gas main pipe. When the coke oven gas main pipe pressure is normal, it is judged whether the opening of the FV is normal, if the opening is normal, the regulating valve XV-1-XV-N is controlled by the temperature sensor of each combustion chamber respectively, if the opening of the FV is too large, the regulating valve XV-1-XV-N is increased by one step at the same time and then returns to the main gas pressure judgment process, if the opening of the FV is too small, the regulating valve XV-1-XV-N is decreased by one step at the same time and then returns to the main gas pressure judgment process. When the coke oven gas main pipe pressure is lower than the lower limit, the system alarms, and it is judged whether the opening of the FV is normal or small, if the opening is normal or small, the main gas pressure judgment process is returned, if the opening is too large, the regulating valve XV-1-XV-N is increased by one step at the same time and then returns to the main gas pressure judgment process. When the coke oven gas main pipe pressure is lower than the lower limit, the interlocked regulating valve XV-1-XV-N is fully opened, and when the coke oven gas main pipe pressure returns to 1.1 times of the normal pressure, the regulating valve XV-1-XV-N returns to the state before interlocking. The opening of the regulating valve XV-1-XV-N can be set to multiple steps according to the actual situation, and it is preferably in the middle step under normal working conditions. When the step of XV-1-XV-N changes each time, the opening is locked for a period of time to keep unchanged. When the coke oven gas main pipe pressure is interlocked at the lower limit, the electromagnetic valve of XV-1-XV-N is de-energized, and the valve is closed, and when it returns to the normal value of 1.1 times, the electromagnetic valve is excited, and the valve returns to the opening before interlocking.

[0036] See Figure 5 The control of the main regulating valve of the single hole combustion chamber heating gas pipeline is described, and the contents are as follows:

[0037] 1) When the remote manual mode is adopted

[0038] The opening of the regulating valve A of each single-hole combustion chamber regulating unit is inputted by artificial in the control system, when the combustion chamber temperature is in the target temperature range, the temperature is controlled by the bypass regulating valve; when the combustion chamber temperature cannot reach the target temperature, the control system gives an alarm, at this time the opening of the regulating valve A is set by artificial;

[0039] 2) When automatic control is adopted

[0040] The combustion chamber temperature and the opening of the bypass regulating valve need to be judged:

[0041] When the combustion chamber temperature is in the target temperature range, the opening of the regulating valve A does not change, the temperature is controlled by the bypass regulating valve;

[0042] When the combustion chamber temperature cannot reach the target temperature, the opening of the bypass regulating valve is judged:

[0043] If the opening of the bypass regulating valve is too large, the opening X of the regulating valve A is increased ’ , the formula is as follows:

[0044] X ’ = X + ΔX ①

[0045] In the formula ①, ΔX is the opening change amount, which is set in the control system; X is the current opening of the regulating valve;

[0046] If the opening of the bypass regulating valve is too small, the opening X of the regulating valve A is decreased ’ , the formula is as follows:

[0047] X ’ = X - ΔX ②.

[0048] The utility model discloses a regulating valve and bypass regulating valve are arranged in each combustion chamber subsystem (namely each single -hole combustion chamber adjusting unit), can completely replace the function of the orifice plate box, do not need manual replacement orifice plate any longer, reduced the labor intensity, reduced the risk that worker operates in the dangerous area such as gas basement, the subsystem includes regulating branch pipe no.

Claims

1. A coke oven gas heated combustion chamber temperature control apparatus characterized by, The application relates to a coke oven gas regulating unit, which comprises a coke oven gas main pipe regulating unit and single-hole combustion chamber regulating units, the coke oven gas main pipe regulating unit is arranged at the front end of the single-hole combustion chamber regulating units, the coke oven gas main pipe regulating unit is connected with a coke oven gas main pipe, each single-hole combustion chamber regulating unit is connected with the coke oven gas main pipe, and the output ends of the single-hole combustion chamber regulating units are respectively connected with corresponding combustion chambers; the coke oven gas main pipe regulating unit comprises a regulating valve C, a flowmeter and a pressure transmitter, the regulating valve C, the flowmeter and the pressure transmitter are sequentially arranged on the coke oven gas main pipe, and the pressure transmitter is used for detecting the pressure of the coke oven gas main pipe.

2. A coke oven gas heating combustion chamber temperature control device according to claim 1, characterized in that, Each single-hole combustion chamber regulating unit comprises regulating branch pipes one and two, branch pipes a and b, the input ends of the regulating branch pipes one and two are respectively connected with the coke oven gas main pipe, and the output ends of the regulating branch pipes one and two are respectively connected with the combustion chambers; one end of the branch pipe a is connected with the regulating branch pipe one, the other end of the branch pipe a is connected with the regulating branch pipe two, one end of the branch pipe b is connected with the regulating branch pipe one, and the other end of the branch pipe b is connected with the regulating branch pipe two.

3. A coke oven gas heating combustion chamber temperature control device according to claim 2, characterized in that, The regulating branch pipe one comprises regulating cocks A and B and regulating valves A and B which are sequentially connected from bottom to top, and the regulating branch pipe two comprises regulating cocks A and B and regulating valves A and B which are sequentially connected from bottom to top. The pipeline connection positions of the regulating valves A and B and the regulating cocks A and B are connected with one end of the branch pipe a, and the pipeline connection positions of the regulating valves A and B and the regulating cocks A and B are connected with the other end of the branch pipe a. The pipeline connection positions of the regulating valves A and B and the regulating cocks A and B are connected with one end of the branch pipe b, and the pipeline connection positions of the regulating valves A and B and the regulating cocks A and B are connected with the other end of the branch pipe b; the branch pipe b comprises stop valves A and B which are connected in series, one end of a bypass regulating valve is connected with the branch pipe a, and the pipeline connection positions of the stop valves A and B are connected with the other end of the bypass regulating valve.

4. A coke oven gas heating combustion chamber temperature control device according to claim 3, characterized in that, The application further comprises connecting rods, actuators, positioners, electromagnetic valves, self-locking valves and temperature sensors, the two ends of the connecting rods are respectively connected with ball hinges, the crank of the regulating valve B is connected with the ball hinge at one end of the connecting rod, the crank of the regulating valve A is connected with the ball hinge at the other end of the connecting rod, the actuator is connected with the regulating valve B and used for driving the regulating valve B to act, the positioner is connected with the actuator, the output end of the electromagnetic valve is connected with the positioner, the input end of the electromagnetic valve is connected with the gas outlet of the self-locking valve, and the gas inlet of the self-locking valve is connected with a gas source.

5. A coke oven gas heating combustion chamber temperature control device according to claim 1, characterized in that, The application further comprises temperature sensors, and each temperature sensor is used for detecting the temperature of a combustion chamber.

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