Automatic control method and device for straw pyrolysis gasification
A technology of pyrolysis gasification and straw, which is applied in the direction of gasification device feeding tools, gasification process, and production of combustible gas. Effects of cost and operational difficulty
Inactive Publication Date: 2021-08-06
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AI-Extracted Technical Summary
Problems solved by technology
As a large agricultural country, the recycling rate of straw in China is currently low, resulting in a great waste of resources and environmental pollution. It is an urgent need to explore more convenient and effective crop straw u...
After the stalk pyrolysis gasification equipment is powered on, the steps of ignition and the step of heating up the furnace are carried out successively, wherein the steps of ignition include: opening the flue gas fan on the roof of the factory building in order, opening the flue gas cyclone dust collector, and opening the outlet of the reaction kettle to disperse Add fuel to the chain grate furnace, turn on the chain grate furnace combustion-supporting fan, turn on the main drive motor of the reactor, and ignite the fuel on the chain grate furnace; Chain grate furnace motor to prevent ash accumulation.
 The operating system includes buttons, indicator lights and operation screens. The operation screen can be used to display ...
The invention provides an automatic control method and device for straw pyrolysis gasification. The automatic control method and device are applied to straw pyrolysis gasification equipment. The straw pyrolysis gasification equipment comprises a feeding system, and the automatic control method for straw pyrolysis gasification comprises the steps that after straw pyrolysis gasification equipment is powered on, an ignition step and a hearth heating step are sequentially executed; a hearth temperature is obtained; and when the hearth temperature reaches a preset feeding temperature interval for the first time, an automatic feeding step is executed to start the feeding system, the feeding speed is controlled, and the heat balance of the system is maintained by carbon residues discharged from a residue discharging opening of the reaction kettle. The automatic control method is applied to the straw pyrolysis and gasification equipment, so that the straw pyrolysis and gasification equipment can complete automatic starting, automatic stopping and automatic production control, and the labor cost and the operation difficulty are reduced.
Gasifier feeding meansGasification processes details +1
Automatic controlProcess engineering +5
- Experimental program(1)
 In order to make the above objects, features, and advantages of the present invention, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
 First, the straw thermal interpolation apparatus in the present invention will be described.
 like Figure 4 Straw thermal solutioning equipment includes: hydraulic feed system, bird mouth system, feed belt, crusher, flue gas fan, flue gas cyclone dust collector, reactor, dispersing tube, slaglet, furnace, chain Rolling furnace, fuel-saving fan, reactor drive motor, chain row drive motor, chain drag, gray residue packing system, supercharged fan, gas air blower, gas cyclone dust collector, rhinar motor, electrical archaper, double Membrane gas storage cabinet, dispersing tube valve, heat exchanger, spray cooling purification system and a combination heat generator.
 Among them, the hydraulic feed system, the bird mouth system, the feed belt belongs to the staby system of straw heat dissipation equipment. After the crusher breaks the whole straw into a small piece of straw, the upper system feeds the straw straw into the reactor, and the hydraulic feed system forms a tight material at the entrance of the reactor to prevent air from entering. The reactor, reducing the oxygen content of the reactor, oxidizing the straw, reducing the reaction, generating a gas-free gas.
 Among them, the furnace and the chain furnace are used to combat the ingredients and the reaction after the reaction, which is heated to the reaction kettle, providing heat to the thermolation of straw in the reactor. The reaction kettle is a core device of straw thermulating, and there is a flare, and the rotation of the reactor is rotated by the motor, and the straw can be continuously propelled in the reactive kettle, and the reactor is opened to produce gas. The unloading port is only opened when the reactor is reversed, and the slag is dropped on the chain furnace. The chain furnace can continue to be rotatable, and the combustion of the slag can be continuously delivered forward, thereby uniformly heat the entire reactor and transferred the burning grade material to the slag machine.
 Among them, the chain tube slag machine, a gray residue packing system, is used to pack the grazes obtained by burning the chain furnace, as a carbon-based fertilizer storage.
 Among them, the gas cooling purification system includes a gas cyclone dust collector, a heat exchanger, a sprinkler system, an electric coke system. The system is used to remove dust and impurities in the gas generated.
 Among them, the double membrane gas storage cabinet and a boost fan, the gas generated by the equipment reactor is micro-positive, the intake pressure of the double membrane gas tank needs to be greater than 9000Pa, so it is necessary to increase the gas pressure to increase the gas pressure, so that the gas is smooth. Enter the double membrane gas storage cabinet.
 Among them, a gas generator uses a qualified gas in a duplex gas tank for power generation.
 Further, in order to realize the automatic control of straw thermolysizing equipment, the straw thermolysizing apparatus also includes a main control module, a transmission control module, and an operating system. The main control module includes a PLC control unit, by collecting various sensor signals, based on the preset procedure, the logical arithmetic processing, generates a control command, outputs a corresponding actuator in the straw thermal solution, and further achieves straw pyrolysis of the present invention Gasification automatic control method.
The main control module can also include a communication unit, a digital input unit, a digital output unit, an analog input unit, an analog output unit, a circuit breaker, a power source, an intermediate relay, and a terminal. The communication unit is optional as a Modbus Communication Template.
 Among them, the drive control module can include a frequency converter, a circuit breaker, a motor initiator, a contactor, a thermal relay, and a terminal. The inverter can communicate with the PLC control unit to realize real-time variable frequency speed of the motor, and feed back the actual operating conditions of the motor to the PLC control unit, display on the operation screen of the operating system. .
 The operating system includes a button, an indicator, and an operation screen. The operation screen can be used to display the operating state parameters of the temperature, pressure, valve, and motor speed, and the operator can be set to the motor and fan in accordance with the operation of the device, and the valve opening and the speed of the flexible motor are set and control. If the motor current is too large, the temperature is too high or too low, the pressure is too low, the pressure is too low, the pressure is too low, and the operating system can make a corresponding alarm. In addition, the operating system has a critical data record and export function of the device, which is convenient for the staff to monitor the device status and optimize the process parameters.
 The present invention proposes a method of automatic control method of straw heat dissipation. figure 1 A flow chart of the automatic control method of straw heat dissipation of the present invention.
 like figure 1 , Applied to straw thermolysizing equipment, straw thermolysizing apparatus includes a material, and a straw thermolytic automatic control method includes:
 After the straw thermolytic device is powered on, the ignition step is performed in turn, where the ignition step includes: opening the factory house top smoke fan, open the smoke ventilated dust removal, open the reactor export dispersing tube, in The fuel is added to the chain furnace, turn on the chain furnace fuel fan, turn on the reactor drive motor, ignit the fuel on the chain furnace; the furnace temperature rise step includes: automatically control the fuel air speed, so that the furnace temperature rises, point the chain furnace Motors prevent gray stacking.
 After performing the ignition step, the furnace temperature rise step is obtained, the furnace temperature is obtained; when the furnace temperature reaches the preset feed temperature range, the automatic feed step is performed to activate the upper system, and control the feed speed, so that the reaction Swum of slags discharged from the slag mouth of the kettle sustain system heat balance. Among them, the thermal balance of the system is expressed as the speed of heat dissipation heat in the reactor and the speed of the carbon residual burning heat reaches the balance. The preset feed temperature interval is optional of 200 to 300 degrees Celsius.
 Among them, the start-up system includes: starting a hydraulic feed system, a bird mouth system, a feed belt and a crusher.
 When the slag, the slag, the slag, the rumor, is discharged, and the chain driver motor, the chain drag machine and the ash pack system are turned on.
 See figure 2 After performing the automatic feed step, it also includes:
 The oxygen content at the reactor exit is detected every first preset interval, wherein the gas can be acquired at the reactor outlet dispersing tube for detecting oxygen content, and the first preset time interval can be selected from 30 minutes;
 When the oxygen content at the reactor exit detected by the first preset is less than or equal to the first oxygen content, it is explained that the heat dissipating equipment of the straw heat dissipating the straw is basically in normal, and the gas quality is passed. At this time, the gas purification step is performed. Open a cooling heat transfer system, spray cooling purification system, open the discharge pipe valve after the booster fan, turn off the pipe gas valve after the supercharged fan, start the booster fan, gas air blower, gas cyclone dust collector, etc. Close the reactor exit dispersing tube valve, wherein the number of first presets can be selected to be greater than or equal to 3 times, and the first oxygen content is optional at 1%, and the amount of reactor exit at the first preset. It is less than or equal to the first oxygen content to be embodied as less than or equal to 1% and at least 3 times;
 Each of the second preset intervals detects the oxygen content in the pipe in the booster fan, wherein the second preset interval is optional for 30 minutes;
 When the oxygen content in the pipe is less than or equal to the second oxygen content after the second predetermined number of times, the gas temperature is adjusted to the first preset temperature, and the electrodescent oil is opened, wherein the second preset is The number of times can be selected to be greater than or equal to 3, and the second oxygen content is optional at 1%. The first preset temperature is optional at 90 degrees Celsius, and the second preset number of oxygen content is less than the oxygen content in the pipe. Or equal to the second oxygen content can be implemented as less than or equal to 1% and at least 3 or more.
 After the adjustment gas temperature to the first preset temperature, after opening the electrical capture oil, it includes: performing the air supply step to open the discharge pipe valve before the double membrane gas storage cabinet, close the pipe in front of the double membrane gas storage cabinet. Airport valve, closing the discharge pipe valve after the supercharged fan, opening the pipe to the pipe to feed the gas port valve after the booster fan.
 After the feed gas step, it also includes: detecting an oxygen content in the front conduit of the double membrane gas receiving time every third preset time interval, wherein the third preset time interval is optional for 30 minutes, which can be in the two membrane. The dispersing tube before the gas storage cabinet is used to detect oxygen content; when the oxygen content in the front conduit of the two-preset number of double membrane gas reservoirs is less than or equal to the third oxygen content, the gas storage step is performed. To turn off the discharge tube valve before the double membrane gas cabinet, open the pipe intake valve before the two membryne gas storage cabinet. Among them, the third oxygen content can be selected from 1%, and the third predetermined number of times is optional to be greater than or equal to 3 times, and the oxygen content in the front conduit of the two-membered gas reservoir detected in the third preset is less than or equal to the first The three oxygen content can be implemented as less than or equal to 1% and at least 3 or more.
 After the gas storage step is performed, it includes: detecting the gas components and gas storage in the double membrane gas cabinet; when the gas components in the double membrane gas storage cabinet meet the preset ingredient requirements, and the amount of gas is greater than the preset gas storage. Open the dual film gas cabinet to the gas generator to supply the gas generator to power generation.
 Prior to the ignition step, it also includes: start the upper system; when the stuff is detected, the upper system is stopped, and the ignition step is performed.
 See image 3 The straw thermal interpolation automatic control method of the present invention also includes: When the parking command is detected, the stop feed step is performed, stop the power generation step, stop the air supply step, and turn off the gas purification system.
 Among them, the stop feedback step includes: stop the forklift feeding, stop the crusher, feed the belt, the bird mouth system, and the hydraulic feed system.
 The stop power generation step includes: As the feed is stopped, the equipment gas volume is gradually decreasing, the amount of gas is lowered, and the generator automatically reduces power until the power generation is stopped.
 The stop feeding step includes: opening the discharge pipe valve before the double membrane gas cabinet, closes the air intake valve of the pipe; open the discharge pipe valve after the booster fan, turn off the air supply valve of the pipeline.
 Turning off the gas purification system includes: Turn off the electrodes of imperitor, spray cooling and purifying system, and open the reactor export dispersing tube valve, and then close the gas cyclone dust collector and rash motor, gas air blower, increase Pressure fan.
 After turning off the gas purification system step, it also includes: when the thermal amazing gas is detected, when the slag is discharged, the fuel-saving, chain row drive motor, chain drag, and aze residue package system; When the furnace temperature is less than the second preset temperature, the reaction kettle master drive motor, flue gas fan and flue gas cleaner are turned off. Among them, the second preset temperature is optional at 100 ° C.
 The present invention adopts the newly developed straw thermulating technique, can prepare straw simultaneously, solid, hot products and use: produced mixed gases, cleaning and combustible gas, can be used for gas internal combustion engine It can also be directly supplied to the local village residents' gas; produced biomass charcoal can be used to further process the production of activated carbon or mechanism charcoal, and the essential nutrients for biomass carbon is rich in crop growth, and there is long-term sustained release for water and fertilizer. Role, the soil of heavy metal pollution, the degraded soil has improved, repair, can be made into carbon-based mix factory; the heat generated during the biomass gasification process can be used in the heat heating heat transfer At the same time, it is also possible to supply gasification system raw materials drying, abandoned crop straw and forest product waste have been well-utilized, creating a good value.
 The straw thermolysizing apparatus of the present invention can complete the automatic start, stop, stabilizing gas, fault alarm, pressure control, temperature control, production parameter report output and other functions of the equipment during production operation, to meet the equipment usage requirements.
 The present invention also proposes a straw thermolyte automatic control device. In an embodiment, the straw thermal solution automatic control device includes a computer readable storage medium and a processor stored with a computer program, the computer program, is implemented, and the straw heat as described above is implemented as described above. Unveiled automatic control method, the specific content of the automatic control method of straw heat dissipation is not described herein.
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