Intelligent residual gas recovery system and method for coal-fired glass production line

Abstract

The invention provides an intelligent residual coal gas recovery system and method for a coal-fired glass production line, and relates to the technical field of glass manufacturing, and the method comprises the following steps: when a reversing instruction is received, controlling a bell jar of a coal exchange machine to move, and enabling residual coal gas in a branch flue to flow into a coal gas storage tank through a bypass flue for storage, cutting off the communication between the coal exchange machine and the main flue, enabling the coal gas stored in the coal gas storage tank to flow into the coal exchange machine after the movement of the bell jar is completed, and cutting off the communication between the coal exchange machine and the main flue when the gas content in the bypass flue is higher than the content threshold value or the temperature in the branch flue is higher than the temperature threshold value; the residual gas in the branch flue is stopped from flowing into the gas storage tank through the bypass flue, the coal exchange machine and the main flue are communicated again, finally, the gas stored in the gas storage tank is stopped from flowing into the coal exchange machine, and reversing of the coal exchange machine is completed. The device has the beneficial effects that all residual coal gas can be collected to the greatest extent in the reversing process of the coal exchange machine, and the waste gas utilization efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of glass manufacturing, and in particular to an intelligent system and method for recovering residual coal gas from a coal-fired glass production line. Background Art

[0002] In the gas-burning glass melting furnace system, multiple regenerators and a common gas flue are configured on both sides. These flues adopt an intermittent fire-changing working mode, which means that after each fire-changing operation, high-temperature gas of about 600°C will remain in the flue that was originally in the air intake state, and this part of the gas will then be discharged into the atmosphere along with the combustion exhaust gas of the melting furnace. This practice not only leads to a large amount of energy waste, but also causes serious pollution to the environment due to the incomplete combustion of the gas. Although many glass production companies and design institutes have conducted in-depth research on this issue, unfortunately, there has not yet been a solution that has been put into production and application. It is worth noting that there are hundreds of gas-burning glass melting furnaces across the country, and the flue gas emissions of these furnaces have become one of the main sources of air pollution.

[0003] The existing gas recovery devices face several key problems in practical applications: first, there are leaks in the device, which results in some residual gas not being effectively captured and sent back to the gas exchanger for reuse; second, there is a lack of necessary detection and feedback control mechanisms, which makes it difficult to achieve intelligent automatic control of the gas recovery system; third, the gas intake point design of the branch flue is unreasonable, and the bypass flue is too long, which not only increases the construction cost, but also does not play a substantial role in improving the residual gas recovery efficiency. These problems jointly restrict the effective application and development of gas recovery technology. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides an intelligent recovery system for residual gas of a coal-fired glass production line, comprising:

[0005] The bypass flue is arranged on one side of the branch flue connected to the gas flue outlet of the coal exchange machine;

[0006] A gas storage tank, connected to the gas outlet of the bypass flue and the gas inlet of the glass factory, and also connected to the gas inlet of the coal exchange machine through a gas outlet pipeline;

[0007] A coal gas recovery device is used to control the movement of the bell cover of the coal exchanger when a reversing instruction is received, and to allow the residual coal gas in the branch flue to flow into the gas storage tank through the bypass flue for storage, and to cut off the connection between the coal exchanger and the main flue, and then to allow the coal gas stored in the gas storage tank to flow into the coal exchanger after the bell cover is moved, and when the gas content in the bypass flue is higher than the content threshold or the temperature in the branch flue is higher than the temperature threshold, to stop the residual coal gas in the branch flue from flowing into the gas storage tank through the bypass flue, and to reconnect the coal exchanger and the main flue, and finally to stop the coal gas stored in the gas storage tank from flowing into the coal exchanger to complete the reversing of the coal exchanger.

[0008] Preferably, it also includes:

[0009] An air intake valve is arranged at the air intake port of the bypass flue, and the bypass flue is also provided with an air intake motor;

[0010] A flue regulating damper is arranged in the main flue, and the flue regulating damper is also connected to a damper motor;

[0011] The gas recovery device is electrically connected to the air intake valve, the air intake motor, the flue regulating valve and the gate motor respectively, and includes:

[0012] The gas collecting unit is used to control the opening of the air intake valve, start the air intake motor for suction, and start the gate motor so that the flue regulating gate cuts off the connection between the coal exchange machine and the main flue, so that the residual gas in the branch flue flows into the gas storage tank through the bypass flue for storage.

[0013] Preferably, it also includes:

[0014] An air outlet valve is arranged in the air outlet pipeline, and an air outlet motor is also arranged in the air outlet pipeline;

[0015] The gas recovery device is electrically connected to the gas outlet valve and the gas outlet motor respectively, and includes:

[0016] The gas return unit is used to control the gas outlet valve to open after the bell jar has moved, and to start the gas outlet motor, so that the gas stored in the gas storage tank flows into the coal exchanger and mixes with the fresh gas entering the coal exchanger.

[0017] Preferably, it also includes:

[0018] A temperature sensor is arranged in the branch flue;

[0019] A gas sensor is arranged at the air inlet of the bypass flue;

[0020] The gas recovery device is electrically connected to the temperature sensor and the gas sensor respectively, and includes:

[0021] The recovery stop unit is used to control the air intake valve to close and stop the air intake motor to stop the residual gas in the branch flue from flowing into the gas storage tank through the bypass flue when the gas sensor detects that the carbon monoxide content in the gas is higher than the set content threshold, or when the temperature sensor detects that the temperature in the branch flue is higher than the temperature threshold, and to control the flue regulating gate to be turned on to reconnect the coal exchanger and the main flue, and finally to stop the gas stored in the gas storage tank from flowing into the coal exchanger to complete the reversing of the coal exchanger.

[0022] Preferably, it also includes:

[0023] A plurality of pressure sensors are respectively arranged in the bypass flue and in the gas outlet duct;

[0024] The device also includes an alarm device connected to each of the pressure sensors, and is used to issue a pressure alarm when it detects that the pressure in the bypass flue or the outlet pipe exceeds a pressure threshold.

[0025] The present invention also provides a method for intelligently recovering residual gas in a coal-fired glass production line, which is applied to the above-mentioned intelligent recovery system for residual gas, and comprises:

[0026] Step S1, the residual gas intelligent recovery system controls the bell cover of the coal exchange machine to move when receiving a reversing instruction, so that the residual gas in the branch flue flows into the gas storage tank through the bypass flue for storage;

[0027] Step S2, the residual gas intelligent recovery system cuts off the connection between the coal exchanger and the main flue, and then allows the coal gas stored in the gas storage tank to flow into the coal exchanger after the bell jar moves;

[0028] Step S3, the residual gas intelligent recovery system determines whether the detected gas content in the bypass flue is higher than a content threshold or the detected temperature in the branch flue is higher than a temperature threshold:

[0029] If yes, go to step S4;

[0030] If not, return to step S2;

[0031] Step S4, the residual gas intelligent recovery system stops the residual gas in the branch flue from flowing into the gas storage tank through the bypass flue, and reconnects the coal exchanger and the main flue, and finally stops the gas stored in the gas storage tank from flowing into the coal exchanger, completing the reversing of the coal exchanger.

[0032] Preferably, the residual gas intelligent recovery system further includes:

[0033] An air intake valve is arranged at the air intake port of the bypass flue, and the bypass flue is also provided with an air intake motor;

[0034] A flue regulating damper is arranged in the main flue, and the flue regulating damper is also connected to a damper motor;

[0035] Then, the residual gas intelligent recovery system in step S1 controls the air intake valve to open upon receiving the reversing command, starts the air intake motor to inhale, and starts the gate motor so that the flue regulating gate cuts off the connection between the coal exchange machine and the main flue, so that the residual gas in the branch flue flows into the gas storage tank through the bypass flue for storage.

[0036] Preferably, the residual gas intelligent recovery system further includes:

[0037] An air outlet valve is arranged in the air outlet pipeline, and an air outlet motor is also arranged in the air outlet pipeline;

[0038] Then, the residual gas intelligent recovery system in step S2 controls the gas outlet valve to open after the bell jar is moved, and starts the gas outlet motor, so that the gas stored in the gas storage tank flows into the coal exchanger and mixes with the fresh gas entering the coal exchanger.

[0039] Preferably, the residual gas intelligent recovery system further includes:

[0040] A temperature sensor is arranged in the branch flue;

[0041] A gas sensor is arranged at the air inlet of the bypass flue;

[0042] In step S3, the residual gas intelligent recovery system determines whether the carbon monoxide in the gas content detected by the gas sensor is higher than a set content threshold, or whether the temperature in the branch flue detected by the temperature sensor is higher than the temperature threshold:

[0043] If yes, go to step S4;

[0044] If not, return to step S2.

[0045] The above technical solution has the following advantages or beneficial effects:

[0046] 1) A bypass flue is set on the side of the branch flue close to the coal exchange machine. There are two advantages of setting up a bypass flue: first, the bypass flue is short, saving construction costs; second, the bypass flue is set at the end of the residual gas flow path, which can collect all the residual gas to the maximum extent;

[0047] 2) A gas storage tank is added between the bypass flue and the coal exchanger, so that the recovered residual gas can be supplied to the glass factory for its own use, such as heating in winter or regular kitchen use; if the glass factory does not need to use the residual gas for itself, it can also be fed back to the coal exchanger to improve the efficiency of waste gas utilization. The two modes can be switched according to actual needs;

[0048] 3) The change in gas temperature and gas content is used as the basis for feedback control and gate linkage to clarify the end node of gas recovery during the coal delivery machine reversing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 The figure is a schematic diagram of the principle of a coal delivery machine in a preferred embodiment of the present invention;

[0050] Figure 2 This is a result schematic diagram of a residual gas intelligent recovery system for a coal-fired glass production line in a preferred embodiment of the present invention;

[0051] Figure 3 This is a structural schematic diagram of a gas recovery device 10 in a preferred embodiment of the present invention;

[0052] Figure 4 The figure is a flow chart of a method for intelligently recovering residual gas from a coal-fired glass production line in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0053] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment, and other embodiments may also fall within the scope of the present invention as long as they conform to the gist of the present invention.

[0054] In a preferred embodiment of the present invention, based on the above problems existing in the prior art, a residual gas intelligent recovery system for a coal-fired glass production line is provided. Figure 2 As shown, including:

[0055] The bypass flue 1 is arranged on one side of the branch flue 3 connected to the gas flue outlet of the coal exchange machine 2;

[0056] The gas storage tank 4 is connected to the gas outlet of the bypass flue 1 and the gas inlet of the glass factory, and is also connected to the gas inlet of the coal exchange machine 2 through the gas outlet pipeline 5;

[0057] The gas recovery device 10 is used to control the bell cover of the coal exchanger 2 when receiving a reversing instruction, and make the residual gas in the branch flue 3 flow into the gas storage tank 4 through the bypass flue 1 for storage, and cut off the connection between the coal exchanger 2 and the main flue 7, and then make the gas stored in the gas storage tank 4 flow into the coal exchanger 2 after the bell cover is completed, and when the gas content is higher than the content threshold or the temperature is higher than the temperature threshold, stop the residual gas in the branch flue 3 from flowing into the gas storage tank 4 through the bypass flue 1, and reconnect the coal exchanger 2 and the main flue 7, and finally stop the gas stored in the gas storage tank from flowing into the coal exchanger 2 to complete the reversing of the coal exchanger.

[0058] Further, in this embodiment, if Figure 2 As shown, it also includes an air intake valve F1 arranged at the air intake port of the bypass flue 1 and a flue regulating damper F3 arranged in the main flue 2; it includes an air intake motor M1 arranged in the bypass flue 1 and a damper motor M3 connected to the flue regulating damper F3; the gas recovery device is electrically connected to the air intake valve, the air intake motor, the flue regulating valve and the damper motor respectively;

[0059] Gas recovery device 10 Figure 3 As shown in, including:

[0060] The gas collecting unit 110 is used to control the opening of the air intake valve F1, start the air intake motor M1 for suction, and start the gate motor M3 so that the flue regulating gate F3 cuts off the connection between the coal exchange machine and the main flue 7, so that the residual gas in the branch flue 3 flows into the gas storage tank 4 through the bypass flue 1 for storage.

[0061] Further, in this embodiment, if Figure 2 As shown, it also includes an outlet valve F2 arranged in the outlet pipeline 5; it includes an outlet motor M2 arranged in the outlet pipeline 5; the gas recovery device is electrically connected to the outlet valve and the outlet motor respectively;

[0062] Gas recovery device 10 Figure 3 As shown in, including:

[0063] The gas return unit 120 is used to control the gas outlet valve F2 to open after the bell cover is completed, and start the gas outlet motor M2, so that the gas stored in the gas storage tank 4 flows into the coal exchanger 2 and mixes with the fresh gas entering the coal exchanger 2.

[0064] Further, in this embodiment, if Figure 2 As shown, it also includes a temperature sensor TE arranged in the branch flue 3 and a gas sensor OE arranged at the air inlet of the bypass flue; the coal gas recovery device is electrically connected to the temperature sensor and the gas sensor respectively;

[0065] Gas recovery device 10 Figure 3 As shown in, including:

[0066] The recovery stop unit 130 is used to stop the residual gas in the branch flue 3 from flowing into the gas storage tank 4 through the bypass flue 1 when the gas sensor OE detects that the carbon monoxide content in the gas is less than the set content threshold, or when the temperature sensor TE detects that the temperature in the branch flue is higher than the temperature threshold, and to reconnect the coal exchanger 2 and the main flue 7, and finally stop the gas stored in the gas storage tank 4 from flowing into the coal exchanger 2, thereby completing the reversing of the coal exchanger.

[0067] Specifically, in this embodiment, Figure 1 As shown in the figure, it is a structural principle diagram of the coal exchange machine. The coal exchange machine 2 consists of three parts, including a base 21, a bell 22 and an upper cover 23. The three holes on the base 21 are channels for gas circulation. When working, the bell covers two of the holes. The gas enters the flue through the uncovered holes and burns in the kiln. At the same time, the exhaust gas enters the middle hole through the side control covered by the bell, and then enters the main flue and is discharged. The bell 22 moves back and forth under the action of the transmission mechanism to realize gas exchange.

[0068] For more details, see Figure 1 and Figure 2 The exhaust hole B in the middle of the coal exchange machine is connected to the main flue to connect to the chimney, and the exhaust holes A and C on both sides are connected to the gas storage chamber MN through the branch flue 3. Figure 2 It can be seen that the whole includes two upper and lower branch flues 3 connecting multiple gas combustion chambers MN on the south and north sides (in this embodiment, the C hole corresponds to 9 gas combustion chambers M on the south side, and the A hole corresponds to 9 gas combustion chambers N on the north side).

[0069] During a normal operation of the coal exchange machine, the base is covered with an upper cover 23, and a bell 22 is built in the upper cover 23. The bell 22 covers the B hole and the A hole, and the inside and outside of the bell 22 are isolated by a water seal, so that two passages are formed, one is the gas passage formed by the gas inlet, the inner cavity of the upper cover and the C hole, and the other is the flue gas passage formed by the inner cavity of the bell and the A and B holes. At this time, the gas enters the gas regenerator through the gas passage, and the flue gas in the kiln is discharged to the main flue through the flue gas passage;

[0070] At this time, the reversing command controls the bell 22 of the coal exchanger 2 to move (i.e., move the bell 22 to the right). At this time, the bell 22 covers the B hole and the C hole, and the inside and outside of the bell 22 are isolated by a water seal, so that two passages are formed, one is the gas passage formed by the gas inlet, the upper cover inner cavity and the A hole, and the other is the flue gas passage formed by the bell jar inner cavity and the B and C holes. At this time, the gas enters the gas regenerator through the gas passage, and the flue gas in the kiln is discharged to the main flue through the flue gas passage;

[0071] Fresh gas begins to flow into the gas regenerator M on the south side of the kiln, and the exhaust gas after combustion in the kiln is discharged to the regenerator N on the north side; at the same time, the gas remaining in the gas regenerator N on the north side of 1#~9# and the residual gas in the branch flue 3 on the north side before the reversal begins to be discharged; the flow direction of the residual gas is "from right to left (from Figure 2 It is seen that it flows toward the coal exchanger 2). As is known, the gas temperature in the heat storage chamber before combustion is 400-500°C, while the exhaust gas temperature after combustion in the melting furnace is about 600-700°C, and the CO and CO2 concentrations of the flue gas after combustion are much higher than those of the fresh gas before combustion. At this time, a large amount of high-temperature coal gas of about 600°C remaining in the original air intake flue will be discharged into the atmosphere along with the exhaust gas from the melting furnace combustion, which not only wastes a lot of energy, but also causes great pollution to the environment due to the incomplete combustion of the coal gas.

[0072] Therefore, at this time, the residual gas is recovered through the gas recovery device, and the process is as follows:

[0073] 1. Control the air intake valve F1 to open, start the air intake motor M1 to inhale, and start the gate motor M3 so that the flue regulating gate F3 cuts off the connection between the coal exchange machine 2 and the main flue 7 (the purpose of this is to prevent the residual gas from leaking from the bypass flue 1 and being discharged into the atmosphere through the bell jar 22 of the coal exchange machine 2 to the main flue 7.), so that the residual gas in the branch flue 3 can flow through the bypass flue 1 into the gas storage tank 4 for storage.

[0074] 2. After the bell jar 22 has moved (6-8 seconds after step 1 is completed), the gas outlet valve F2 is controlled to open, and the gas outlet motor M2 is started, so that the gas stored in the gas storage tank 4 flows into the coal exchanger 2 and mixes with the fresh gas entering the coal exchanger, and is supplied to the gas heat storage chamber M on the south side as the next round of fuel combustion.

[0075] 3. While executing step 1 and step 2, the gas sensor OE detects the gas content in the branch flue 3, and the temperature sensor T3 detects the temperature in the branch flue 3;

[0076] When the gas sensor OE detects that the carbon monoxide in the gas content is less than the set content threshold and the temperature sensor TE detects that the temperature in the branch flue 3 is lower than the temperature threshold, the air inlet valve F1 is kept open, the air inlet motor M1 is kept sucking air, the flue regulating damper F3 is kept closed, the air outlet valve F2 is kept open, and the air outlet motor M2 is kept started, so that the coal gas stored in the gas storage tank 4 continuously flows into the coal exchanger 2 and mixes with the fresh coal gas entering the coal exchanger;

[0077] When the gas sensor OE detects that the carbon monoxide in the gas content is less than the set content threshold, or when the temperature sensor TE detects that the temperature in the branch flue 3 is higher than the temperature threshold, it means that the "waste gas" has filled the north gas heat storage chamber N and the branch flue 3, and the residual gas has been basically collected. Close the air intake valve F1, stop the air intake motor M1, open the flue regulating damper F3, close the air outlet valve F2 and stop the air outlet motor M2 to stop the residual gas in the branch flue 3 from flowing into the gas storage tank 4 through the bypass flue 1, and reconnect the coal exchange machine 2 and the main flue 7, and finally stop the gas stored in the gas storage tank 4 from flowing into the coal exchange machine 2, complete the reversal of the coal exchange machine 2 and wait for the next reversal of the coal exchange machine 2.

[0078] Since the branch flues 3, gas heat storage chamber MN, bypass flue 1 and various valves and motors on the north and south sides of the system are symmetrically arranged, when reversing from north to south, the motors and valves at the symmetrical positions on the south side are opened and closed according to the above process, so as to realize gas collection during the reversing process.

[0079] Compared with the existing recovery device, this system has the following advantages:

[0080] 1. Optimize the location of the "gas intake point" of the bypass flue 1. The bypass flue 1 is set closer to the coal exchange machine 2. The flue is short, which can save materials and collect all residual coal gas to the maximum extent.

[0081] 2. Add gas storage tank 4; the residual gas can be used by the glass factory itself, or fed back to the coal delivery machine 2. Two modes can be switched according to actual needs.

[0082] 3. Added temperature sensor TE and gas sensor OE, which use the changes in gas temperature and concentration as the basis for system feedback control and gate linkage.

[0083] 4. A new flue regulating damper F3 is added to participate in the linkage. When the coal gas is recovered, the flue regulating damper F3 is always in a closed state to ensure that the residual coal gas can be 100% recovered; when the residual coal gas is recovered, the flue regulating damper is opened again to discharge the exhaust gas.

[0084] 5. Optimize the selection of motors and valves. The air inlet motor M1, air outlet motor M2 and gate motor M3 use "explosion-proof" motors. The air inlet valve F1 and air outlet valve F2 use pneumatic butterfly valves, and are equipped with 24VDC electromagnetic control valves. This design can minimize the probability of explosion accidents caused by gas leakage. In this way, the probability of explosion accidents caused by gas leakage is minimized and the reliability of safe production is improved.

[0085] In a preferred embodiment of the present invention, it also includes multiple pressure sensors, which are respectively arranged in the bypass flue and the exhaust duct, and also includes an alarm device connected to each sensor, which is used to issue a pressure alarm when it detects that the pressure in the bypass flue or the exhaust duct exceeds a pressure threshold.

[0086] The present invention also provides a method for intelligently recovering residual gas in a coal-fired glass production line, which is applied to the above-mentioned intelligent recovery system for residual gas, such as Figure 4 As shown, including:

[0087] Step S1, the residual gas intelligent recovery system controls the bell cover of the coal exchange machine to move when receiving a reversing instruction, so that the residual gas in the branch flue flows into the gas storage tank through the bypass flue for storage;

[0088] Step S2, the residual gas intelligent recovery system cuts off the connection between the coal exchanger and the main flue, and then allows the coal gas stored in the gas storage tank to flow into the coal exchanger after the bell jar moves;

[0089] Step S3, the residual gas intelligent recovery system determines whether the detected gas content in the bypass flue is higher than a content threshold or the detected temperature in the branch flue is higher than a temperature threshold:

[0090] If yes, go to step S4;

[0091] If not, return to step S2;

[0092] Step S4, the residual gas intelligent recovery system stops the residual gas in the branch flue from flowing into the gas storage tank through the bypass flue, and reconnects the coal exchanger and the main flue, and finally stops the gas stored in the gas storage tank from flowing into the coal exchanger, completing the reversing of the coal exchanger.

[0093] Preferably, the residual gas intelligent recovery system further includes:

[0094] An air intake valve is arranged at the air intake port of the bypass flue, and the bypass flue is also provided with an air intake motor;

[0095] A flue regulating damper is arranged in the main flue, and the flue regulating damper is also connected to a damper motor;

[0096] Then, the residual gas intelligent recovery system in step S1 controls the air intake valve to open upon receiving the reversing command, starts the air intake motor to inhale, and starts the gate motor so that the flue regulating gate cuts off the connection between the coal exchange machine and the main flue, so that the residual gas in the branch flue flows into the gas storage tank through the bypass flue for storage.

[0097] Preferably, the residual gas intelligent recovery system further includes:

[0098] An air outlet valve is arranged in the air outlet pipeline, and an air outlet motor is also arranged in the air outlet pipeline;

[0099] Then, the residual gas intelligent recovery system in step S2 controls the gas outlet valve to open after the bell jar is moved, and starts the gas outlet motor, so that the gas stored in the gas storage tank flows into the coal exchanger and mixes with the fresh gas entering the coal exchanger.

[0100] Preferably, the residual gas intelligent recovery system further includes:

[0101] A temperature sensor is arranged in the branch flue;

[0102] A gas sensor is arranged at the air inlet of the bypass flue;

[0103] In step S3, the residual gas intelligent recovery system determines whether the carbon monoxide in the gas content detected by the gas sensor is higher than a set content threshold, or whether the temperature in the branch flue detected by the temperature sensor is higher than the temperature threshold:

[0104] If yes, go to step S4;

[0105] If not, return to step S2.

[0106] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. An intelligent recovery system for residual gas in a coal-fired glass production line, characterized in that: include: The bypass flue is arranged on one side of the branch flue connected to the gas flue outlet of the coal exchange machine; A gas storage tank, connected to the gas outlet of the bypass flue and the gas inlet of the glass factory, and also connected to the gas inlet of the coal exchange machine through a gas outlet pipeline; A coal gas recovery device is used to control the movement of the bell cover of the coal exchanger when a reversing instruction is received, and to allow the residual coal gas in the branch flue to flow into the gas storage tank through the bypass flue for storage, and to cut off the connection between the coal exchanger and the main flue, and then to allow the coal gas stored in the gas storage tank to flow into the coal exchanger after the bell cover is moved, and when the gas content in the bypass flue is higher than the content threshold or the temperature in the branch flue is higher than the temperature threshold, to stop the residual coal gas in the branch flue from flowing into the gas storage tank through the bypass flue, and to reconnect the coal exchanger and the main flue, and finally to stop the coal gas stored in the gas storage tank from flowing into the coal exchanger to complete the reversing of the coal exchanger.

2. The residual gas intelligent recovery system according to claim 1 is characterized in that: Also includes: An air intake valve is arranged at the air intake port of the bypass flue, and the bypass flue is also provided with an air intake motor; A flue regulating damper is arranged in the main flue, and the flue regulating damper is also connected to a damper motor; The gas recovery device is electrically connected to the air intake valve, the air intake motor, the flue regulating valve and the gate motor respectively, and includes: The gas collecting unit is used to control the opening of the air intake valve, start the air intake motor for suction, and start the gate motor so that the flue regulating gate cuts off the connection between the coal exchange machine and the main flue, so that the residual gas in the branch flue flows into the gas storage tank through the bypass flue for storage.

3. The residual gas intelligent recovery system according to claim 1 is characterized in that: Also includes: An air outlet valve is arranged in the air outlet pipeline, and an air outlet motor is also arranged in the air outlet pipeline; The gas recovery device is electrically connected to the gas outlet valve and the gas outlet motor respectively, and includes: The gas return unit is used to control the gas outlet valve to open after the bell jar has moved, and to start the gas outlet motor, so that the gas stored in the gas storage tank flows into the coal exchanger and mixes with the fresh gas entering the coal exchanger.

4. The residual gas intelligent recovery system according to claim 2 is characterized in that: Also includes: A temperature sensor is arranged in the branch flue; A gas sensor is arranged at the air inlet of the bypass flue; The coal gas recovery device is electrically connected to the temperature sensor and the gas sensor respectively, and comprises: The recovery stop unit is used to control the air intake valve to close and stop the air intake motor to stop the residual gas in the branch flue from flowing into the gas storage tank through the bypass flue when the gas sensor detects that the carbon monoxide content in the gas is higher than the set content threshold, or when the temperature sensor detects that the temperature in the branch flue is higher than the temperature threshold, and to control the flue regulating gate to be turned on to reconnect the coal exchanger and the main flue, and finally to stop the gas stored in the gas storage tank from flowing into the coal exchanger to complete the reversing of the coal exchanger.

5. The residual gas intelligent recovery system according to claim 1 is characterized in that: Also includes: A plurality of pressure sensors are respectively arranged in the bypass flue and in the gas outlet duct; It also includes an alarm device connected to each of the pressure sensors, and is used to issue a pressure alarm when it detects that the pressure in the bypass flue or the outlet pipe exceeds a pressure threshold.

6. A method for intelligently recovering residual gas from a coal-fired glass production line, characterized in that: The residual gas intelligent recovery system as claimed in any one of claims 1 to 5 comprises: Step S1, the residual gas intelligent recovery system controls the bell cover of the coal exchange machine to move when receiving a reversing instruction, so that the residual gas in the branch flue flows into the gas storage tank through the bypass flue for storage; Step S2, the residual gas intelligent recovery system cuts off the connection between the coal exchanger and the main flue, and then allows the coal gas stored in the gas storage tank to flow into the coal exchanger after the bell jar moves; Step S3, the residual gas intelligent recovery system determines whether the detected gas content in the bypass flue is higher than a content threshold or the detected temperature in the branch flue is higher than a temperature threshold: If yes, go to step S4; If not, return to step S2; Step S4, the residual gas intelligent recovery system stops the residual gas in the branch flue from flowing into the gas storage tank through the bypass flue, and reconnects the coal exchanger and the main flue, and finally stops the gas stored in the gas storage tank from flowing into the coal exchanger, completing the reversing of the coal exchanger.

7. The intelligent recovery method of residual gas according to claim 6, characterized in that: The residual gas intelligent recovery system also includes: An air intake valve is arranged at the air intake port of the bypass flue, and the bypass flue is also provided with an air intake motor; A flue regulating damper is arranged in the main flue, and the flue regulating damper is also connected to a damper motor; Then, the residual gas intelligent recovery system in step S1 controls the air intake valve to open upon receiving the reversing command, starts the air intake motor to inhale, and starts the gate motor so that the flue regulating gate cuts off the connection between the coal exchange machine and the main flue, so that the residual gas in the branch flue flows into the gas storage tank through the bypass flue for storage.

8. The intelligent method for recovering residual gas according to claim 6, characterized in that: The residual gas intelligent recovery system also includes: An air outlet valve is arranged in the air outlet pipeline, and an air outlet motor is also arranged in the air outlet pipeline; Then, the residual gas intelligent recovery system in step S2 controls the gas outlet valve to open after the bell jar is moved, and starts the gas outlet motor, so that the gas stored in the gas storage tank flows into the coal exchanger and mixes with the fresh gas entering the coal exchanger.

9. The intelligent method for recovering residual gas according to claim 7, characterized in that: The residual gas intelligent recovery system also includes: A temperature sensor is arranged in the branch flue; A gas sensor is arranged at the air inlet of the bypass flue; In step S3, the residual gas intelligent recovery system determines whether the carbon monoxide in the gas content detected by the gas sensor is higher than a set content threshold, or whether the temperature in the branch flue detected by the temperature sensor is higher than the temperature threshold: If yes, go to step S4; If not, return to step S2.

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