Automatic control system for coal injection pulverization flow

Abstract

The utility model provides an automatic control system for coal injection pulverizing flow, and belongs to the field of coal injection pulverizing. The automatic control system comprises an acquisition module, a comparison module, a central control module, an adjusting module, a valve module, a communication module and an alarm module, compares reference signals by acquiring temperature, pressure and flow information in real time, and automatically adjusts operation parameters according to the information, so that the automatic control of the flow of the coal injection powder is realized. And the automatic control of the coal conveying and pulverizing process is realized. According to the method, the environment information in the powder making process can be ensured to be always within the preset range, product quality fluctuation caused by environment change is avoided, and the possibility of human errors is reduced. And meanwhile, the alarm module monitors information of each link in real time, early warning is carried out on abnormal conditions in time, and the accident risk is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of coal-injection pulverizing technology, and in particular to an automatic control system for coal-injection pulverizing flow. Background Art

[0002] Coal injection pulverizing is a technical measure in the steelmaking process, which involves directly injecting finely ground coal powder into the blast furnace to replace part of the metallurgical coke, thereby reducing the cost of pig iron and adjusting the furnace conditions. During the operation of the current coal injection pulverizing system, various operating parameters and the amount of pulverized coal are adjusted manually. Due to the high risk factor of the coal injection pulverizing system, it is difficult to manually adjust and control the relevant parameters, and the amount of pulverized coal is small and the energy consumption is high. A more intelligent automatic adjustment and control system is needed to save labor costs, ensure personnel safety, and improve the overall stability and energy-saving efficiency of the system. Utility Model Content

[0003] The disclosed embodiment provides a coal injection pulverizing flow automatic control system to solve the problems of low automation level, high workload and high safety risk factor in the coal injection pulverizing process.

[0004] In a first aspect, an embodiment of the present disclosure provides a coal injection pulverizing flow automatic control system, comprising:

[0005] Acquisition module, comparison module, central control module, regulation module and valve module;

[0006] The comparison module has a non-inverting input terminal connected to the acquisition module, a first reverse input terminal for receiving a first reference signal, a second reverse input terminal for receiving a second reference signal, and an output terminal connected to the central control module; the first reference signal represents an upper limit value of the environmental information, and the second reference signal represents a lower limit value of the environmental information;

[0007] The output end of the central control module is connected to the regulating module and the valve module respectively;

[0008] The acquisition module is configured to acquire environmental information of coal conveying and pulverizing, and the comparison module is configured to compare the environmental information and output a comparison signal;

[0009] The central control module is configured to obtain the operating parameters of coal conveying and pulverizing according to the comparison signal of the comparison module, and control the regulating module and the valve module respectively according to the operating parameters.

[0010] In an exemplary embodiment of the present disclosure, the comparison module includes: a first comparator, a second comparator and an adder;

[0011] A first comparator, whose in-phase input terminal is connected to the acquisition module, whose in-phase input terminal is used to receive the first reference signal, and whose output terminal is connected to the adder;

[0012] A second comparator, whose in-phase input terminal is connected to the acquisition module, whose inverting input terminal is used to receive a second reference signal, and whose output terminal is connected to the adder;

[0013] The output end of the adder is connected to the central control module.

[0014] In an exemplary embodiment of the present disclosure, the acquisition module includes a flow acquisition module;

[0015] The flow collection module is connected to the comparison module.

[0016] In an exemplary embodiment of the present disclosure, the acquisition module includes a flow acquisition module and an environment acquisition module;

[0017] The flow collection module is connected to the comparison module;

[0018] The environment acquisition module is connected to the central control module.

[0019] In an exemplary embodiment of the present disclosure, the coal conveying and pulverizing system includes a raw coal bunker, a coal feeder, a coal mill, a flue gas heating furnace, an induced draft fan, an exhaust fan and a bag-type powder collector;

[0020] The raw coal bin is connected to the environment collection module;

[0021] The coal feeder is connected to the flow collection module and the regulating module respectively;

[0022] The coal mill is connected to the environment collection module;

[0023] The flue gas heating furnace is respectively connected to the environment collection module, the flow collection module and the regulating module;

[0024] The induced draft fan is connected to the flow collection module and the regulating module respectively;

[0025] The exhaust fan is connected to the flow collection module and the regulating module respectively;

[0026] The bag-type powder collector is connected to the environment collection module, the flow collection module and the regulating module respectively.

[0027] In an exemplary embodiment of the present disclosure, the valve module includes a combustion-supporting air adjustment unit, an exhaust gas bypass adjustment unit, and a coal gas bypass adjustment unit;

[0028] The combustion-supporting air regulating unit is arranged in the flue gas heating furnace, and the combustion-supporting air regulating unit is connected to the communication module;

[0029] The exhaust gas bypass adjustment unit is arranged on the induced draft fan or the exhaust fan, and the exhaust gas bypass adjustment unit is connected to the communication module;

[0030] The gas bypass regulating unit is arranged on a gas cabinet or a gas pipeline, and the gas bypass regulating unit is connected to the communication module.

[0031] In an exemplary embodiment of the present disclosure, a coal injection pulverizing flow automatic control system further includes: a communication module;

[0032] The communication module is connected to the central control module, the regulating module and the valve module respectively.

[0033] In an exemplary embodiment of the present disclosure, a coal injection pulverizing flow automatic control system further includes: an alarm module;

[0034] The alarm module is connected to the central control module.

[0035] The beneficial effects of an automatic control system for coal-injection pulverizing flow provided by the disclosed embodiment are as follows: the disclosed embodiment can collect environmental information of coal conveying and pulverizing in real time, including key parameters such as flow, temperature, and pressure, ensuring the accuracy and timeliness of the data. The comparison module can compare the environmental information in real time according to the preset first and second reference signals, and output the corresponding comparison signal, providing a decision-making basis for the central control module. The central control module can quickly calculate the operating parameters of coal conveying and pulverizing according to the comparison signal, and accurately control it through the adjustment module and the valve module to ensure that the coal-injection pulverizing process operates within a safe and efficient range. This not only improves production efficiency, reduces energy consumption, labor intensity and safety risks, but also reduces errors caused by human operation and improves the stability and reliability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 It is a structural schematic diagram of a coal injection pulverizing flow automatic control system provided by an embodiment of the present disclosure;

[0038] Figure 2 It is a structural schematic diagram of another automatic control system for coal injection pulverizing flow provided by an embodiment of the present disclosure;

[0039] Figure 3It is a structural schematic diagram of another coal injection pulverizing flow automatic control system provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the present solution, the technical solution in the embodiments of the present solution will be clearly described below in conjunction with the drawings in the embodiments of the present solution. Obviously, the described embodiments are embodiments of a part of the present solution, not all embodiments. Based on the embodiments in the present solution, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present solution.

[0041] The term "including" and any other variations in the specification and claims of this solution and the above drawings mean "including but not limited to", and is intended to cover non-exclusive inclusions and is not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.

[0042] The following is a detailed description of the implementation of the present disclosure in conjunction with the specific drawings:

[0043] Figure 1 This is a schematic diagram of the structure of an automatic control system for coal pulverizing flow provided by an embodiment of the present disclosure. Figure 1 The coal injection pulverizing flow automatic control system includes a collection module 101, a comparison module 102, a central control module 103, a regulation module 104 and a valve module 105.

[0044] The comparison module 102 has a common-phase input terminal connected to the acquisition module 101, a first reverse input terminal for receiving a first reference signal, a second reverse input terminal for receiving a second reference signal, and an output terminal connected to the central control module 103. The first reference signal indicates an upper limit value of the environmental information, and the second reference signal indicates a lower limit value of the environmental information.

[0045] The output end of the central control module 103 is connected to the regulating module 104 and the valve module 105 respectively.

[0046] The acquisition module 101 is configured to acquire environmental information of coal transportation and pulverizing, and the comparison module 102 is configured to compare the environmental information and output a comparison signal.

[0047] The central control module 103 is configured to obtain the operating parameters of coal conveying and pulverizing according to the comparison signal of the comparison module 102, and control the regulating module 104 and the valve module 105 respectively according to the operating parameters.

[0048] In this embodiment, the comparison module 102 has a common-phase input terminal connected to the acquisition module 101, a first reverse input terminal for receiving a first reference signal, a second reverse input terminal for receiving a second reference signal, and an output terminal connected to the central control module 103. The first reference signal represents the upper limit value of the environmental information, and the second reference signal represents the lower limit value of the environmental information. The environmental information may include

[0049] Exemplarily, the comparison module 102 receives the real-time flue gas furnace temperature signal from the acquisition module 101. The first reference signal is set as the lower limit of the flue gas furnace temperature, such as 60 degrees Celsius, and the second reference signal is set as the upper limit of the flue gas furnace temperature, such as 80 degrees Celsius. When the flue gas furnace temperature is lower than 60 degrees Celsius, the first comparator outputs a signal to increase the flue gas furnace temperature. When the flue gas furnace temperature is higher than 80 degrees Celsius, the second comparator outputs a signal to reduce the flue gas furnace temperature. The adder combines these two signals to control the central control module 103 to adjust the operating state of the induced draft fan or the combustion-supporting fan to achieve automatic adjustment of the flue gas furnace temperature.

[0050] Exemplarily, the comparison module 102 receives the real-time pulverized coal flow signal from the acquisition module 101. The first reference signal is set as the lower limit of the flow, for example, 20 t / h, and the second reference signal is set as the upper limit of the flow, for example, 150 t / h. When the flow is lower than 20 t / h, the first comparator outputs a signal to increase the supply of pulverized coal. When the flow is higher than 150 t / h, the second comparator outputs a signal to reduce the supply of pulverized coal. The adder combines these two signals to control the central control module 103 to adjust the speed of the coal feeder to achieve automatic regulation of the pulverized coal flow.

[0051] like Figure 2 As shown, in this embodiment, the comparison module 102 includes a first comparator, a second comparator and an adder.

[0052] The first comparator has a non-inverting input terminal connected to the acquisition module 101 , an inverting input terminal for receiving a first reference signal, and an output terminal connected to the adder.

[0053] The second comparator has a non-inverting input terminal connected to the acquisition module 101 , an inverting input terminal for receiving a second reference signal, and an output terminal connected to the adder.

[0054] The output end of the adder is connected to the central control module 103 .

[0055] Exemplarily, when the acquisition module 101 inputs the collected pollinator outlet temperature into the comparison module 102, for example, the pollinator outlet temperature is 85 degrees Celsius, the data is input into the in-phase input end of the first comparator and the second comparator respectively. The first reference signal is set as the upper limit of the pollinator outlet temperature, for example, the upper limit of the pollinator outlet temperature is 80 degrees Celsius, and the second reference signal is set as the lower limit of the pollinator outlet temperature, for example, the lower limit of the pollinator outlet temperature is 60 degrees Celsius. The first reference signal is input into the inverting input end of the first comparator, and the first comparison module 102 compares the two input data. If the pollinator outlet temperature is greater than or equal to the first reference signal, 1 is output. The second reference signal is input into the inverting input end of the second comparator, and the second comparison module 102 compares the two input data. If the pollinator outlet temperature is greater than or equal to the first reference signal, 1 is output. The adder receives the two input signals, obtains the signal value 10 after calculation, and transmits the signal to the central control module 103. The central control module 103 determines that the signal is that the pollinator outlet temperature is too high and issues a cooling instruction.

[0056] Exemplarily, when the pollinator outlet temperature is 55 degrees Celsius, which is less than the first reference signal, the first comparison module 102 outputs 0, and when it is less than the second reference signal, the second comparison module 102 outputs 0. The adder calculates the signal value of 0 and transmits the signal to the central control module 103. The central control module 103 determines that the signal indicates that the pollinator outlet temperature is too low and issues a heating instruction.

[0057] Exemplarily, when the pollinator outlet temperature is 60 degrees Celsius, the first comparison module 102 outputs 0, the second comparison module 102 outputs 1, the adder obtains a signal value of 1 after calculation, and transmits the signal to the central control module 103, which determines that the signal indicates that the pollinator outlet temperature is normal.

[0058] In this embodiment, the output end of the central control module 103 is respectively connected to the regulating module 104 and the valve module 105. The central control module 103 is configured to transmit control instructions to the regulating module 104 and the valve module 105 to control the execution status of the two modules. The central control module 103 may include a PLC.

[0059] In this embodiment, the acquisition module 101 is configured to collect environmental information of coal conveying and pulverizing, and the comparison module 102 is configured to compare the environmental information and output a comparison signal. The environmental information may include at least one of ambient temperature, ambient pressure, water content and oxygen content.

[0060] In this embodiment, the central control module 103 is configured to obtain the operating parameters of coal conveying and pulverizing according to the comparison signal of the comparison module 102, and control the regulating module 104 and the valve module 105 respectively according to the operating parameters.

[0061] For example, when the pulverized coal flow rate is lower than the preset value, the central control module 103 receives the signal from the comparison module 102 and adjusts the regulation module 104 according to the signal, for example, increasing the speed of the coal feeder to increase the pulverized coal supply. At the same time, the central control module 103 can control the valve module 105, for example, adjusting the opening of the combustion air valve to ensure that the ratio of pulverized coal to air is optimal.

[0062] This embodiment can collect environmental information of coal conveying and pulverizing in real time, including key parameters such as flow rate, temperature, and pressure, ensuring the accuracy and timeliness of the data. The comparison module 102 can compare the environmental information in real time according to the preset first and second reference signals, and output the corresponding comparison signal, providing a decision-making basis for the central control module 103. The central control module 103 can quickly calculate the operating parameters of coal conveying and pulverizing according to the comparison signal, and accurately control it through the adjustment module 104 and the valve module 105 to ensure that the coal injection pulverizing process operates within a safe and efficient range. This not only improves production efficiency, reduces energy consumption, labor intensity and safety risks, but also reduces errors caused by human operation, and improves the stability and reliability of the entire system.

[0063] like Figure 3 As shown, in one embodiment of the present disclosure, the collection module 101 includes a traffic collection module 106 .

[0064] The flow collection module 106 is connected to the comparison module 102 .

[0065] In this embodiment, the flow collection module 106 is configured to collect coal powder flow information during the coal transportation and pulverizing process.

[0066] Exemplarily, when the pulverized coal flow rate is lower than the preset value, the flow acquisition module 106 transmits the data change information to the comparison module 102. The comparison module 102 compares the preset upper and lower flow limits and outputs a corresponding signal to the central control module 103. Based on this signal, the central control module 103 increases the speed of the coal feeder through the adjustment module 104 and adjusts the air door opening through the valve module 105 to ensure that the pulverized coal flow rate is stable within the set range, thereby realizing automatic control of the coal injection pulverizing flow rate.

[0067] The flow acquisition module 106 can monitor the flow changes in the coal conveying and pulverizing process in real time and accurately, ensuring the continuity and stability of the production process. Through the connection with the comparison module 102, the flow acquisition module 106 can send the flow data to the comparison module 102 in time for comparison and analysis, thereby ensuring that the flow control is within a preset reasonable range. In addition, the accurate collection and real-time analysis of the flow data enables the system to quickly adjust the flow of coal conveying and pulverizing according to actual production needs, thereby improving production efficiency and product quality.

[0068] like Figure 3 As shown, in one embodiment of the present disclosure, the collection module 101 includes a traffic collection module 106 and an environment collection module 107 .

[0069] The flow collection module 106 is connected to the comparison module 102 .

[0070] The environment acquisition module 107 is connected to the central control module 103 .

[0071] In this embodiment, the environmental acquisition module 107 is configured to collect environmental information of coal transportation and pulverizing, and the environmental information may include at least one of flue gas furnace temperature, gas pressure, mill differential pressure, exhaust gas temperature, oxygen content, carbon monoxide content, flue gas furnace air pressure ratio, mill outlet temperature, pollinator inlet temperature, pollinator outlet temperature, and system operating air volume.

[0072] The flow acquisition module 106 can monitor the flow changes in the coal conveying and pulverizing process in real time and accurately, ensuring the accuracy and stability of flow control. Through the connection with the comparison module 102, the flow data is used to compare with the preset flow standard to achieve adaptive adjustment of the flow and ensure the continuity and efficiency of production. The environment acquisition module 107 can comprehensively collect various parameters in the production environment and provide comprehensive environmental information to the central control module 103. Based on this information, the central control module 103 can more accurately judge the production status and make corresponding control decisions to ensure the safety and efficiency of the production process.

[0073] In one embodiment of the present disclosure, coal conveying and pulverizing includes a raw coal bin, a coal feeder, a coal mill, a flue gas heating furnace, an induced draft fan, an exhaust fan and a bag-type powder collector.

[0074] The raw coal bunker is connected to the environment collection module 107 .

[0075] The coal feeder is connected to the flow collection module 106 and the regulating module 104 respectively.

[0076] The coal mill is connected to the environment collection module 107 .

[0077] The flue gas heating furnace is connected to the environment collection module 107 , the flow collection module 106 and the regulation module 104 respectively.

[0078] The induced draft fan is connected to the flow collection module 106 and the regulating module 104 respectively.

[0079] The exhaust fan is connected to the flow collection module 106 and the regulating module 104 respectively.

[0080] The bag-type powder collector is connected to the environment collection module 107 , the flow collection module 106 and the adjustment module 104 respectively.

[0081] In this embodiment, the environment acquisition module 107 can collect environmental information of the raw coal bin, coal mill, flue gas heating furnace and bag-type powder collector, such as temperature, humidity and pressure. At the same time, the flow acquisition module 106 is responsible for collecting the flow data of the coal feeder, flue gas heating furnace, induced draft fan and exhaust fan to ensure that the coal powder flow rate is within an appropriate range. When the environment acquisition module 107 detects that the internal temperature of the coal mill is too high, the central control module 103 can receive this information, calculate the appropriate adjustment plan according to the preset algorithm, and transmit it to the adjustment module 104 to reduce the speed of the coal feeder and reduce the supply of coal powder, thereby reducing the load and temperature of the coal mill. At the same time, the central control module 103 can also transmit control instructions to adjust the speed of the induced draft fan and the exhaust fan to improve the ventilation inside the coal mill and further reduce the temperature.

[0082] Exemplarily, the coal injection pulverizing flow automatic control system is used in a thermal power plant. The raw coal bin stores raw coal transported from the coal mine. The coal feeder continuously and evenly feeds the raw coal into the coal mill according to the needs of the boiler load. The coal mill grinds the raw coal into coal powder that meets the requirements, and dries and heats it with hot air provided by the flue gas heating furnace. The induced draft fan transports the coal powder to the burner of the boiler for combustion, generating high-temperature and high-pressure steam to drive the steam turbine to generate electricity. The exhaust fan and the bag powder collector are responsible for removing exhaust gas and collecting coal powder, respectively. The environment acquisition module 107, the flow acquisition module 106 and the adjustment module 104 can monitor the operating parameters of the system in real time and adjust the operating status of the equipment according to these parameters.

[0083] This embodiment enables the system to monitor the environmental information and flow data in the coal conveying and pulverizing process in real time and comprehensively. Through the environment acquisition module 107, the system can accurately grasp the temperature, pressure, humidity and other parameters of the environment of equipment such as the raw coal bin, coal mill, flue gas heating furnace and bag-type powder collector, ensuring that the pulverizing process is carried out under safe and stable conditions. At the same time, the flow acquisition module 106 can monitor the flow data of equipment such as coal feeders, induced draft fans and exhaust fans in real time, and provide accurate feedback for the adjustment module 104. Through the adjustment module 104, the system can automatically adjust the parameters according to the changes in environmental information and flow data to achieve optimal control of the pulverizing process.

[0084] In one embodiment of the present disclosure, the valve module 105 includes a combustion-supporting air regulating unit, an exhaust gas bypass regulating unit, and a coal gas bypass regulating unit.

[0085] The combustion-supporting air regulating unit is arranged in the flue gas heating furnace, and the combustion-supporting air regulating unit is connected to the communication module 108 .

[0086] The exhaust gas bypass adjustment unit is arranged on the induced draft fan or the exhaust fan, and the exhaust gas bypass adjustment unit is connected to the communication module 108 .

[0087] The gas bypass regulating unit is disposed on a gas cabinet or a gas pipeline, and the gas bypass regulating unit is connected to the communication module 108 .

[0088] In this embodiment, the combustion-supporting air regulating unit is arranged in the flue gas heating furnace, and the combustion-supporting air regulating unit is connected to the communication module 108. The combustion-supporting air regulating unit is configured to control the amount of combustion-supporting air entering the pulverizing system. The combustion-supporting air regulating unit is connected to the communication module 108, and can receive instructions from the central control system through the communication module 108, and according to the instructions of the central control module 103, the combustion-supporting air regulating unit will adjust the opening of the combustion-supporting air regulating valve to control the flow of the combustion-supporting air.

[0089] Exemplarily, during the pulverizing process, when the flow rate or quality of the pulverized coal changes, the central control module 103 will determine the combustion-supporting air volume that needs to be adjusted based on preset parameters or real-time environmental information. The instructions issued by the central control system are transmitted to the combustion-supporting air adjustment unit through the communication module 108. These instructions may include parameters such as the set value of the combustion-supporting air volume and the adjustment rate. After receiving the instructions, the combustion-supporting air adjustment unit drives the corresponding execution unit, such as a valve and a motor, to adjust the opening of the combustion-supporting air valve. By changing the opening of the valve, the amount of combustion-supporting air entering the furnace can be controlled. At the same time, the combustion-supporting air adjustment unit can transmit the current combustion-supporting air volume or other related parameters to the central control system. The central control system can adjust the instructions based on the feedback data.

[0090] For example, when the furnace temperature is low, the central control system sends a command to the combustion-supporting air regulating unit through the communication module 108 to control the combustion-supporting air regulating unit to increase the combustion-supporting air volume. After receiving the command, the combustion-supporting air regulating unit opens the combustion-supporting air valve to allow more combustion-supporting air to enter the furnace. When the furnace temperature reaches the set value and remains stable, the central control system will adjust the set value of the combustion-supporting air volume in real time according to the flow rate and quality of the pulverized coal, and the temperature and pressure in the furnace. The combustion-supporting air regulating unit adjusts the opening of the combustion-supporting air valve according to the new command.

[0091] For example, when abnormal conditions such as abnormal temperature rise or pressure fluctuation occur in the furnace, the central control system can issue instructions to control the combustion air adjustment unit to take corresponding measures. For example, the combustion air volume can be reduced to reduce the combustion speed of the pulverized coal.

[0092] In this embodiment, the exhaust gas bypass adjustment unit is arranged on the induced draft fan or the exhaust fan, and the exhaust gas bypass adjustment unit is connected to the communication module 108. The exhaust gas bypass adjustment unit is configured to control the opening of the exhaust gas bypass valve, thereby adjusting the flow of exhaust gas in the system. The exhaust gas bypass adjustment unit is connected to the communication module 108, and can receive instructions from the central control system through the communication module 108, and adjust the opening of the exhaust gas bypass valve in real time according to these instructions.

[0093] Exemplarily, when the internal pressure of the system exceeds a preset pressure threshold, the central control module 103 sends a command to the exhaust bypass unit through the communication module 108 to control the exhaust bypass valve to open to a certain extent, thereby discharging part of the exhaust gas into the atmosphere, thereby reducing the internal pressure of the system and maintaining stable operation of the system.

[0094] For example, when the system has an abnormal situation such as equipment failure or pipeline blockage, the central control module 103 can issue instructions through the communication module 108 to adjust the opening degree of the exhaust bypass valve. For example, when the pipeline is blocked and the exhaust gas cannot be discharged smoothly, the exhaust bypass valve can be opened to bypass part of the exhaust gas and reduce the pipeline pressure.

[0095] In this embodiment, the gas bypass regulating unit is arranged on the gas cabinet or the gas pipeline, and the gas bypass regulating unit is connected to the communication module 108. The gas bypass regulating unit is configured to control the flow of gas based on the opening and closing of the valve. The gas bypass regulating unit is connected to the communication module 108, and can receive instructions from the central control system through the communication module 108, and adjust the opening of the gas bypass valve in real time according to these instructions.

[0096] For example, when the coal powder in the burner is blocked and causes incomplete combustion, the central control module 103 can send an instruction to increase the gas flow rate to the gas bypass regulating unit through the communication module 108. The gas bypass regulating unit adjusts the opening degree of the gas bypass valve according to the instruction to increase the gas flow rate.

[0097] In this embodiment, the setting of the combustion-supporting air regulating unit can accurately control the combustion-supporting air volume in the flue gas heating furnace to ensure the high efficiency and stability of the combustion process. The setting of the exhaust gas bypass regulating unit enables the induced draft fan or exhaust fan to flexibly adjust the exhaust gas emission and emission path according to the actual production situation. It helps to reduce the pollution of the environment by exhaust gas and improve the operating efficiency of the system. The setting of the gas bypass regulating unit can ensure the stability and safety of the gas supply. The unit can automatically adjust the gas supply and supply speed according to the pressure, flow and other parameters of the gas tank or gas pipeline, and can open the three-way switching valve to release the gas when a failure occurs to ensure the safe operation of the system.

[0098] like Figure 3 As shown, in one embodiment of the present disclosure, a coal injection pulverizing flow automatic control system further includes a communication module 108 .

[0099] The communication module 108 is connected to the central control module 103 , the regulating module 104 and the valve module 105 respectively.

[0100] For example, when the central control module 103 detects that the pulverized coal flow rate deviates from the preset value, it can send an adjustment instruction to the regulating module 104 through the communication module 108 to change the speed of the coal feeder. At the same time, the communication module 108 can feed back the opening information of the valve module 105 to the central control module 103.

[0101] The communication module 108 acts as a bridge for information transmission, ensuring real-time and accurate data exchange between the central control module 103, the regulating module 104 and the valve module 105. This enables the system to quickly respond to various changes in the production process and achieve precise flow control. In addition, the central control module 103 can centrally manage and control the regulating module 104 and the valve module 105 through the communication module 108, ensuring the efficient operation of the entire system.

[0102] like Figure 3 As shown, in one embodiment of the present disclosure, a coal injection pulverizing flow automatic control system further includes an alarm module 109 .

[0103] The alarm module 109 is connected to the central control module 103 .

[0104] In this embodiment, the alarm module 109 can monitor the parameters in the environment in real time through built-in sensors, analyze and process the collected information through internal signal processing circuits, and transmit it to the alarm output part. When the signal meets the preset alarm conditions, it will trigger the corresponding alarm device to sound an alarm.

[0105] For example, when the coal mill stops due to electrical failure, bearing damage or overtemperature, the central control module 103 can obtain the abnormal situation information and trigger an alarm. For example, an alarm sound is sounded, a light flashes, and an alarm message is transmitted to the central control module 103 or other external devices. The alarm message may include a specific fault code or description so that the operator can quickly locate the problem and take measures.

[0106] In this embodiment, when the system detects abnormal coal injection pulverizing flow rate, equipment failure or environmental parameters exceeding the preset range, the central control module 103 can analyze and process these abnormal conditions and trigger the alarm module 109. After receiving the instruction from the central control module 103, the alarm module 109 can start the sound and light alarm, display the error information on the display screen or send an alarm signal to relevant personnel.

[0107] For example, the difference between the primary wind pressure and the sealed wind pressure in a certain device received by the central control module 103 is reduced, which may be caused by the blockage of the sealed fan inlet filter, the leakage or damage of the sealed wind duct, the incorrect position of the sealed wind duct baffle, etc. The central control module 103 transmits the abnormal information and the alarm start instruction to the alarm module 109. According to the instruction, the alarm module 109 can start the sound and light alarm, display the error information on the display screen, or send an alarm signal to the relevant personnel, prompting the operator to check the relevant equipment and pipelines to ensure the stability of the system pressure.

[0108] The alarm module 109 can monitor the operating status of the system in real time. Once an abnormal situation is found, such as abnormal flow, excessive temperature, etc., the alarm mechanism can be triggered immediately, and an alarm can be issued to the operator through sound and light signals or other means. This enables the operator to promptly discover and deal with potential safety hazards, ensuring the safety and stability of the production process. At the same time, the connection between the alarm module 109 and the central control module 103 realizes intelligent monitoring and management. When the alarm module 109 is triggered, the central control module 103 can quickly receive the alarm signal and automatically adjust or start the emergency treatment program according to the preset emergency treatment plan. This automated processing flow greatly reduces the need for manual intervention and improves the response speed and processing efficiency of the system.

[0109] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A coal injection pulverizing flow automatic control system, characterized in that: include: Acquisition module, comparison module, central control module, regulation module and valve module; The comparison module has a non-inverting input terminal connected to the acquisition module, a first reverse input terminal for receiving a first reference signal, a second reverse input terminal for receiving a second reference signal, and an output terminal connected to the central control module; The first reference signal indicates an upper limit value of the environmental information, and the second reference signal indicates a lower limit value of the environmental information; The comparison module comprises: a first comparator, a second comparator and an adder; A first comparator, whose in-phase input terminal is connected to the acquisition module, whose in-phase input terminal is used to receive the first reference signal, and whose output terminal is connected to the adder; A second comparator, whose in-phase input terminal is connected to the acquisition module, whose inverting input terminal is used to receive a second reference signal, and whose output terminal is connected to the adder; The output end of the adder is connected to the central control module; The output end of the central control module is connected to the regulating module and the valve module respectively; The acquisition module is configured to acquire environmental information of coal conveying and pulverizing, and the comparison module is configured to compare the environmental information and output a comparison signal; The central control module is configured to obtain the operating parameters of coal conveying and pulverizing according to the comparison signal of the comparison module, and control the regulating module and the valve module respectively according to the operating parameters.

2. The automatic control system for coal pulverizing flow rate according to claim 1, characterized in that: The collection module includes a flow collection module; The flow collection module is connected to the comparison module.

3. The automatic control system for coal pulverizing flow rate according to claim 1, characterized in that: The acquisition module includes a flow acquisition module and an environment acquisition module; The flow collection module is connected to the comparison module; The environment acquisition module is connected to the central control module.

4. A coal pulverizing flow automatic control system as claimed in claim 3, characterized in that: The coal conveying and pulverizing comprises a raw coal bunker, a coal feeder, a coal mill, a flue gas heating furnace, an induced draft fan, an exhaust fan and a bag-type powder collector; The raw coal bin is connected to the environment collection module; The coal feeder is connected to the flow collection module and the regulating module respectively; The coal mill is connected to the environment collection module; The flue gas heating furnace is respectively connected to the environment collection module, the flow collection module and the regulating module; The induced draft fan is connected to the flow collection module and the regulating module respectively; The exhaust fan is connected to the flow collection module and the regulating module respectively; The bag-type powder collector is connected to the environment collection module, the flow collection module and the regulating module respectively.

5. The automatic control system for coal pulverizing flow rate of coal injection as claimed in claim 1, characterized in that: Also includes a communication module; The communication module is connected to the central control module, the regulating module and the valve module respectively.

6. A coal-injection pulverizing flow automatic control system as claimed in claim 5, characterized in that: The valve module includes a combustion-supporting air regulating unit, an exhaust gas bypass regulating unit and a coal gas bypass regulating unit; The combustion-supporting air regulating unit is arranged in the flue gas heating furnace, and the combustion-supporting air regulating unit is connected to the communication module; The exhaust gas bypass adjustment unit is arranged on the induced draft fan or the exhaust fan, and the exhaust gas bypass adjustment unit is connected to the communication module; The gas bypass regulating unit is arranged on a gas cabinet or a gas pipeline, and the gas bypass regulating unit is connected to the communication module.

7. The automatic control system for coal pulverizing flow rate of coal injection as claimed in claim 1, characterized in that: Also includes: Alarm module; The alarm module is connected to the central control module.

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