Linkage control system of solid material sealed feeding mechanism

Abstract

A linkage control system of a solid material sealed feeding mechanism comprises a man-machine interaction interface, an upper computer or a touch screen is adopted, and data exchange is achieved by communicating with a programmable logic controller through a network protocol; a programmable logic controller controls a double-helix distributor, a feeding shaftless helix A, a Z-shaped elevator, a belt weigher, a pneumatic gate valve A, a pneumatic gate valve B, a nitrogen replacement electromagnetic valve, a fire extinguishing nitrogen electromagnetic valve, a material poking push rod A, a material poking push rod B, a feeding shaftless helix B, a feeding vertical helix and a pyrolysis reactor. The programmable logic controller receives sensor signals from a hopper material level high switch A, a hopper material level low switch B, a blanking pipe material level high switch C and a blanking pipe material level low switch D; the programmable logic controller controls each module through a frequency converter or an electric drive or an electromagnetic valve or a direct start drive or directly controls each module, and collects data of each module through the frequency converter or the electric drive or the electromagnetic valve or the direct start drive or directly collects data of each module.

Description

Technical Field

[0001] The invention relates to a linkage control system of a solid material sealed feeding mechanism, which is used for automatic feeding control in organic solid waste resource utilization and processing technology. Background Art

[0002] The pyrolysis process is an advanced organic solid waste treatment process, which achieves the pyrolysis of organic components in solid waste by high temperature and oxygen-free method. The pyrolysis process must not only ensure harmless treatment (no dioxin generation), save energy and reduce consumption, improve heat treatment efficiency, but also reduce human resource costs and intensity as much as possible to improve work efficiency. The automatic feeding of the organic solid waste pyrolysis process requires that the solid material feed is continuous, uniform and adjustable and meets the sealing requirements of the organic solid waste feed to achieve an oxygen-free environment in the pyrolysis reactor.

[0003] The existing organic solid waste treatment process, especially domestic waste treatment, is mainly incineration treatment, which is divided into mechanical grates, circulating fluidized beds and rotary kilns. Mechanical grates are mainly used in the waste treatment industry. The waste feed is generally composed of a waste storage pit, a waste grab, a waste feed hopper, a switch gate, a feed chute and a pusher. The feed amount is mainly adjusted by controlling the pushing speed of the pusher. For the pyrolysis process, the mechanical grate garbage feeding method can neither achieve the sealing of the feeding nor ensure the continuity and uniformity of the feeding, so it cannot meet the feeding requirements of the pyrolysis process; the feeding method of the circulating fluidized bed is to transport the pre-treated organic solid waste to the incinerator through a shaftless double-screw feeding device. Although it achieves continuous feeding, the internal filling of the shaftless double-screw device is loose during feeding, and the sealing and oxygen-free effect cannot be effectively achieved; the feeding devices for rotary kiln incineration are currently mainly feeding screws, push scrapers or belt feeders. Feeding screws and belt feeders cannot achieve effective sealing, and feeding scrapers cannot achieve continuous, uniform and adjustable feeding.

[0004] In summary, the pyrolysis process of organic solid waste is an anaerobic heating pyrolysis process. In order to ensure that the organic solid waste materials entering the reactor can be continuously, stably and safely pyrolyzed, it is necessary to carry out technical innovation and improvement on the feeding mechanism to realize the continuous, stable and safe automatic feeding of organic solid waste materials. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art, solve the problem of continuous, stable and safe fully automatic feeding of organic solid waste materials, and to automatically and continuously transport the organic solid waste (particle size range 20 to 100 mm) after crushing and drying pretreatment from a hopper to a pyrolysis reactor, with a continuous and uniform feeding amount and good adjustability and safety.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A linkage control system for a sealed feeding mechanism of solid materials comprises a programmable logic controller, a human-machine interface, a double-screw distributor, a shaftless feeding screw A, a Z-type elevator, a belt scale, a pneumatic gate valve A, a pneumatic gate valve B, a nitrogen replacement solenoid valve, a fire extinguishing nitrogen solenoid valve, a poke push rod A, a poke push rod B, a shaftless feeding screw B, a vertical feeding screw, a pyrolysis reactor, a hopper material level high switch A, a hopper material level low switch B, a discharge pipe material level high switch C, and a discharge pipe material level low switch D.

[0008] The programmable logic controller is connected with the human-computer interaction interface, and the programmable logic controller controls the double-screw distributor, the shaftless feeding screw A, the Z-type elevator, the belt scale, the pneumatic gate valve A, the pneumatic gate valve B, the replacement nitrogen solenoid valve, the fire extinguishing nitrogen solenoid valve, the poke push rod A, the poke push rod B, the shaftless feeding screw B, the feeding vertical screw, and the pyrolysis reactor respectively; the programmable logic controller receives sensor signals from the hopper material level high switch A, the hopper material level low switch B, the discharge pipe material level high switch C, and the discharge pipe material level low switch D.

[0009] The human-machine interaction interface adopts a host computer or a touch screen to communicate with a programmable logic controller through a network protocol to achieve data exchange. The human-machine interaction interface can not only display the parameters of the feeding system in real time, but also control the equipment of the feeding system in real time.

[0010] The programmable logic controller controls each module through a frequency converter or an electrical drive or a solenoid valve or a direct start drive or directly collects data of each module through a frequency converter or an electrical drive or a solenoid valve or a direct start drive or directly.

[0011] The programmable logic controller drives the double-screw distributor through a frequency converter to realize the remote start / stop / speed control function of the double-screw distributor and receive the operation / fault / speed / current feedback signal of the frequency converter.

[0012] The programmable logic controller drives the feeding shaftless screw A through the frequency converter to realize the remote start / stop / speed control function of the feeding shaftless screw A, and receives the operation / fault / speed / current feedback signal of the frequency converter.

[0013] The programmable logic controller drives the Z-type hoist through the frequency converter to realize the remote start / stop / speed control function of the Z-type hoist, and receives the frequency converter operation / fault / speed / current feedback signal.

[0014] The programmable logic controller realizes the remote start and stop control function of the belt scale by electrically driving the belt scale, and receives the operation / fault / real-time weighing signal of the electrical drive.

[0015] The programmable logic controller controls the air source through the solenoid valve to drive the pneumatic gate valve A, realizes the remote switch command control function of the pneumatic gate valve A, and receives the open / closed position feedback signal of the gate valve travel switch.

[0016] The programmable logic controller controls the air source through the solenoid valve to drive the pneumatic gate valve B, realizes the remote switch command control function of the pneumatic gate valve B, and receives the open / closed position feedback signal of the gate valve travel switch.

[0017] The programmable logic controller directly drives the nitrogen replacement solenoid valve to realize the remote switch command control function of the nitrogen replacement solenoid valve and receives the open / closed position feedback signal of the solenoid valve travel switch.

[0018] The programmable logic controller directly drives the fire extinguishing nitrogen solenoid valve to realize the remote switch command control function of the fire extinguishing nitrogen solenoid valve and receive the open / closed position feedback signal of the solenoid valve travel switch.

[0019] The programmable logic controller drives the material-poking push rod A through the electrical direct start to realize the start and stop functions of the material-poking push rod A, and receives the operation / fault / current signal from the electrical direct start drive.

[0020] The programmable logic controller drives the material-poking push rod B through the electrical direct start to realize the start and stop functions of the material-poking push rod B, and receives the operation / fault / current signals from the electrical direct start drive.

[0021] The programmable logic controller drives the feeding shaftless screw B through the frequency converter to realize the remote start / stop / speed control function of the feeding shaftless screw B, and receives the operation / fault / speed / current feedback signal of the frequency converter.

[0022] The programmable logic controller drives the feeding vertical screw through electrical direct start to realize the start and stop function of the feeding vertical screw and receives the operation / fault / current signal from the direct start drive.

[0023] The programmable logic controller drives the pyrolysis reactor through a frequency converter to realize the start / stop / speed control function of the pyrolysis reactor and receives operation / fault / speed / current feedback signals from the frequency converter.

[0024] The control method in case of failure is as follows:

[0025] 1) The human-computer interaction interface provides fault information alarm prompts and emits sound and light alarms at the same time;

[0026] 2) Stop the automatic feeding program at the same time;

[0027] 3) At the same time, a stop command is issued through the programmable logic controller to stop the double screw distributor, the shaftless screw A for feeding, the Z-type elevator, the belt scale, the pushing rod A for poking the material, the pushing rod B for poking the material, the shaftless screw B for feeding, and the vertical screw for feeding;

[0028] 4) Close the gate valve A, gate valve B and nitrogen replacement solenoid valve at the same time;

[0029] 5) If a fire-related fault occurs, open the fire-extinguishing nitrogen solenoid valve.

[0030] Normal working control method ( Figure 3 As shown) as follows:

[0031] 1) Start the pyrolysis reactor and set the operating frequency;

[0032] 2) Start the feeding vertical screw and set the working frequency;

[0033] 3) Start the feeding shaftless screw B and set the operating frequency;

[0034] 4) Start the operation of the material pushing rod A and the material pushing rod B;

[0035] 5) Start the belt scale operation;

[0036] 6) Start the automatic feeding system. The first step of automatic feeding is to close the gate valve B. After the gate valve B is fully closed, the next step will be automatically carried out;

[0037] 7) Start the automatic feeding system. The second step of automatic feeding is to open the gate valve A. After the gate valve A is fully opened, the next step will be automatically carried out;

[0038] 8) Start the automatic feeding system. The third step of the automatic feeding is to open the nitrogen replacement solenoid valve. After the nitrogen replacement solenoid valve is fully opened, the next step is automatically performed;

[0039] 9) Start the automatic feeding system. In the fourth step of automatic feeding, start the Z-type elevator, the shaftless feeding screw A, and the double-screw distributor in sequence. After running, the feeding time is controlled by time control and material level. The time control logic is to set the timer T1 to start timing, and the feeding ends when the time reaches T1; the material level control logic is to judge through the material level high switch C of the feeding pipe. When material is detected, the feeding is judged to be finished; after the feeding is finished, the double-screw distributor, the shaftless feeding screw A, and the Z-type elevator are stopped in sequence, and the next step is automatically carried out after all are stopped;

[0040] 10) Start the automatic feeding system, the fifth step of automatic feeding, set the delay time T2, close the gate valve A after the automatic delay time is up, and automatically proceed to the next step after the gate valve A is closed;

[0041] 11) Start the automatic feeding system, the sixth step of automatic feeding, close the nitrogen replacement valve, and automatically proceed to the next step after the nitrogen replacement valve is closed;

[0042] 12) Start the automatic feeding system, the seventh step of automatic feeding, open the gate valve B, and the next step will be automatically carried out after the gate valve B is fully opened;

[0043] 13) Start the automatic feeding system. In the eighth step of automatic feeding, the feeding status of the solid material can be judged by time control judgment and material level control judgment. The time control judgment sets the automatic timing T3. When the timing T3 is reached, the feeding is judged to be finished. The material level control judgment is judged by the material level low switch D of the feeding pipe. When the material level detection result is no material, the feeding is judged to be finished. After the feeding is finished, the next step is automatically carried out;

[0044] 14) Start the automatic feeding system, the ninth step of automatic feeding, close the gate valve B, after the gate valve B is fully closed, enter the feeding cycle process, that is, return to step 6) to continue the automatic feeding system.

[0045] 15) The hopper material level high switch A and the hopper material level low switch B are set in the feed hopper to judge the material amount in the hopper, and normally keep it in the low material state and high material state.

[0046] A solid material feeding system comprises a hopper, a feeding pipe, and the above linkage control system;

[0047] The hopper is used to store organic solid waste materials after crushing and dehydration, and is provided with a high level switch A and a low level switch B for the hopper to monitor the high and low status of the hopper level in real time. The organic material is transported to the Z-type elevator through the double-screw distributor and the feeding shaftless screw A, and then enters the vertical discharge pipe after real-time weighing through the belt scale. The discharge pipe is provided with high and low level switches, pneumatic gate valve A, pneumatic gate valve B, poke push rod A, and poke push rod B. After passing through the discharge pipe, the material enters the pyrolysis reactor through the feeding shaftless screw B and the feeding vertical screw.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] The purpose of the present invention is to automatically and continuously transport organic solid waste materials (particle size range 20-100 mm) after crushing and dehydration pretreatment from a hopper to a pyrolysis reactor. The present invention mainly includes a programmable logic controller, a human-machine interface, a double-screw distributor frequency converter, a feed shaftless screw A frequency converter, a Z-type elevator frequency converter, a belt scale, a pneumatic gate valve A / B, a replacement nitrogen solenoid valve, a fire extinguishing nitrogen solenoid valve, a poking push rod A / B, a feed shaftless screw B frequency converter, a feed vertical screw, and a pyrolysis reactor frequency converter. Starting from the hopper double-screw distributor, the materials are transported to the pyrolysis reactor according to logic control.

[0050] The frequency and working time of the double screw distributor of the feeding mechanism, the frequency and working time of the shaftless screw A, the frequency and working time of the Z-type elevator, the switching action and time of the pneumatic gate valve A / B, and the frequency and working time of the shaftless screw B of the feeding mechanism are adjusted through the programmable logic controller to achieve the dynamic balance adjustment of the continuous transportation of solid materials and the adjustment of the feeding amount; a replacement nitrogen solenoid valve is set between the pneumatic gate valves A / B, and during the process of the pneumatic gate valves A / B being alternately opened and closed, replacement nitrogen is introduced to keep the feeding pipe in a slightly positive pressure state. At the same time, the pneumatic gate valves A / B have a sealing effect when they are closed, so that the feeding process is isolated and sealed from the outside air. Through the above automatic control, the continuous and uniform adjustment of the solid material feeding amount is achieved, and the adjustability is good. It also achieves the isolation and sealing of the solid material feeding and the outside air environment, and has good safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is the structural diagram of the solid material feeding system;

[0052] Figure 2 This is a structural diagram of the control system of the present invention;

[0053] Figure 3 The control method flow chart is shown in FIG. DETAILED DESCRIPTION

[0054] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0055] A linkage control system for a sealed feeding mechanism of solid materials. Organic solid waste materials after crushing and dehydration are stored in a ground hopper. A hopper material level high switch A and a hopper material level low switch B are arranged in the hopper to monitor the high and low states of the hopper material level in real time. The organic materials are conveyed to a Z-type elevator through a double-screw distributor and a feeding shaftless screw A, and then enter a vertical feeding pipe after being weighed in real time through a belt scale. The feeding pipe is provided with high and low material level switches, pneumatic gate valves A / B and a poking push rod A / B. After passing through the feeding pipe, the materials enter a pyrolysis reactor through the feeding shaftless screw B and the feeding vertical screw.

[0056] Among them, the double-screw distributor, shaftless feed screw A, Z-type elevator and shaftless feed screw B are variable frequency motors, and the speed can be adjusted in real time.

[0057] The programmable logic controller has programmed control logic and safety interlock protection programs, which control the electrical inverter / electrical direct start drive / solenoid valve and other driving field equipment through signal input and output, thereby realizing the linkage control of the solid material feeding system.

[0058] like Figure 1As shown, the solid material feeding system is configured as follows: hopper 1, hopper material level high switch A2, hopper material level low switch B3, double screw distributor 4, feeding shaftless screw A5, Z-type elevator 6, belt scale 7, feeding pipe 8, pneumatic gate valve A9, feeding pipe material level high switch C10, nitrogen replacement solenoid valve 11, pneumatic gate valve B12, material poking push rod A13, material poking push rod B14, fire extinguishing nitrogen solenoid valve 15, feeding pipe material level low switch D16, feeding shaftless screw B17, feeding vertical screw 18, pyrolysis reactor 19, as well as programmable logic controller and human-computer interaction interface.

[0059] Figure 2 The figure below is the structure diagram of the control system. The signal forms in the figure are:

[0060] Start and stop: Passive dry contact signal, contact capacity not less than 2A

[0061] Speed ​​control: 4~20mA analog signal

[0062] Operation / fault / switch in place: passive dry contact signal, contact capacity not less than 2A

[0063] Speed ​​feedback / real-time weighing / current: 4~20mA analog signal

[0064] The programmable logic controller is connected with the human-computer interaction interface, and the programmable logic controller controls the double-screw distributor 4, the shaftless feeding screw A5, the Z-type elevator 6, the belt scale 7, the pneumatic gate valve A9, the pneumatic gate valve B12, the replacement nitrogen solenoid valve 11, the fire-extinguishing nitrogen solenoid valve 15, the poking push rod A13, the poking push rod B14, the shaftless feeding screw B17, the feeding vertical screw 18, and the pyrolysis reactor 19 respectively; the programmable logic controller receives sensor signals from the hopper material level high switch 2, the hopper material level low switch 3, the discharge pipe material level high switch 10, and the discharge pipe material level low switch 16.

[0065] The control system structure mainly includes the following contents:

[0066] 1) Human-machine interaction interface, using a host computer or touch screen to communicate with the programmable logic controller through a network protocol to achieve data exchange. The human-machine interaction interface can not only display the parameters of the feeding system in real time, but also control the equipment of the feeding system in real time;

[0067] 2) Programmable logic controller, which collects data from the frequency converter and electrical drive in the feeding system, and can also control the operation of the feeding system through output signals;

[0068] 3) The double spiral distributor 4 is driven by a frequency converter and realizes remote start / stop / speed control functions with a programmable logic controller, and receives the frequency converter operation / fault / speed / current signals;

[0069] 4) The feed shaftless screw A5 is driven by a frequency converter and realizes remote start / stop / speed control functions with a programmable logic controller, and receives the frequency converter operation / fault / speed / current signals;

[0070] 5) Z-type hoist 6, driven by a frequency converter, realizes remote start / stop / speed control function with a programmable logic controller, and receives frequency converter operation / fault / speed / current signals;

[0071] 6) Belt scale 7, driven by the belt scale electrical cabinet, realizes remote start and stop control function with the programmed logic controller, and receives the operation / fault / real-time weighing signal of the electrical drive;

[0072] 7) Pneumatic gate valve A9 and pneumatic gate valve B12 control the gas source through the solenoid valve to drive the gate valve switch, realize the remote switch control function with the programmable logic controller, and receive the open / closed state signal of the gate valve;

[0073] 8) The nitrogen replacement solenoid valve 11 and the fire extinguishing nitrogen solenoid valve 15 are directly driven by a programmable logic controller and receive the open / closed state signal of the solenoid valve;

[0074] 9) The material pushing rod A13 and the material pushing rod B14 realize the start and stop functions with the programmable logic controller through the electrical direct start drive, and receive the operation / fault / current signal from the electrical direct start drive;

[0075] 10) Feeding shaftless screw B17, driven by frequency converter, realizes remote start / stop / speed control function with programmable logic controller, and receives frequency converter operation / fault / speed / current signals;

[0076] 11) The feeding vertical screw 18 realizes the start and stop function with the programmable logic controller through the electrical direct start drive, and receives the operation / fault / current signal from the electrical direct start drive;

[0077] 12) The pyrolysis reactor 19 is driven by a frequency converter and realizes remote start / stop / speed control functions with a programmable logic controller, and receives the frequency converter operation / fault / speed / current signals.

[0078] The normal working logic flow of the linkage control system (such as Figure 3 As shown), the automatic control process is realized through programmable logic controller, electric drive / frequency converter, field equipment and sensors. The control method is as follows:

[0079] Start the pyrolysis reactor 19 and set the working frequency to determine whether it is working normally. If it is working normally, proceed to the next step. If it is not working normally, check the fault and restart;

[0080] Start the feeding vertical screw 18 to determine whether it works normally. If it works normally, proceed to the next step. If it does not work normally, check for faults and restart;

[0081] Start the feeding shaftless screw B17 and set the working frequency to determine whether it is working normally. If it is working normally, proceed to the next step. If it is not working properly, check the fault and restart;

[0082] Start the material pushing rod A13 and the material pushing rod B14 to determine whether they are working normally. If they are working normally, proceed to the next step. If they are not working normally, check the fault and restart;

[0083] Start the belt scale 7 to determine whether it is working normally. If it is working normally, proceed to the next step. If it is not working normally, check the fault and restart;

[0084] After the pyrolysis reactor 19, the feeding vertical screw 18, the feeding shaftless screw B17, the poke push rod A13, and the poke push rod B14 are working normally, proceed to the next step. If they are not working normally, check the fault and restart;

[0085] Start automatic feeding, start the automatic feeding program - automatically close the pneumatic gate valve B12, and automatically continue to the next step after the pneumatic gate valve B12 is closed;

[0086] Start the automatic feeding program - automatically open the pneumatic gate valve A9, and automatically continue to the next step after the pneumatic gate valve A9 opens to the right position;

[0087] Start the automatic feeding program - automatically open the nitrogen replacement solenoid valve 11, and automatically continue to the next step after the nitrogen replacement solenoid valve 11 is fully opened;

[0088] Start the automatic feeding program - automatically start the Z-type elevator 6, the shaftless feeding screw A5, and the double-screw distributor 4 in sequence. The running time of the three devices can be controlled by time or level. The time control logic is to set the timer T1 to start timing, and the feeding ends when the time reaches T1; the level control logic is to judge through the material level high switch C10 of the feeding pipe. When the material is detected, the feeding is judged to be over; when the feeding is finished, the double-screw distributor 4, the shaftless feeding screw A5, and the Z-type elevator 6 are automatically stopped in sequence, and the next step is automatically carried out after stopping;

[0089] Start the automatic feeding program - the pneumatic gate valve A9 will be automatically closed after the delay T2 seconds, and the next step will be automatically carried out after the pneumatic gate valve A9 is closed;

[0090] Start the automatic feeding program - automatically close the nitrogen replacement solenoid valve 11, and automatically proceed to the next step after the nitrogen replacement solenoid valve 11 is closed;

[0091] Start the automatic feeding program - automatically open the pneumatic gate valve B12, and detect the feeding status after the pneumatic gate valve B12 is fully opened. The opening time of the pneumatic gate valve B12 can be selected as time control or material level control. The time control judgment sets the automatic timing T3. When the timing T3 is reached, it is judged that the feeding is over; the material level control judgment is judged by the low material level switch D16 of the feed pipe. When the material level detection result is no material, it is judged that the feeding is over; then the pneumatic gate valve B12 is automatically closed, and the pneumatic gate valve B12 is automatically cycled after it is fully closed.

[0092] The linkage control fail-safe interlock performs automatic action. The control method is as follows:

[0093] When the following faults occur during normal execution, safety actions are performed. The fault information includes: double screw distributor 4 (stop, fault, overcurrent), feeding shaftless screw A5 (stop, fault, overcurrent), Z-type elevator 6 (stop, fault, overcurrent), belt scale 7 metering mechanism fault (stop, fault), pneumatic gate valve A9 fault (cannot open or close), pneumatic gate valve B12 fault (cannot open or close), replacement nitrogen solenoid valve 11 fault (cannot open or close), fire extinguishing nitrogen solenoid valve 15 fault (cannot open or close), poking push rod A13 fault (stop, fault, overcurrent), poking push rod B14 fault (stop, fault, overcurrent), feeding shaftless screw B17 fault (stop, fault, overcurrent), feeding vertical screw fault 18 (stop, fault, overcurrent), pyrolysis reactor 19 fault (stop, fault, overcurrent) and system shutdown (system shutdown, external shutdown, etc.).

[0094] The actions automatically executed in case of a fault are as follows:

[0095] 1) The human-computer interaction interface provides fault information alarm prompts and emits sound and light alarms at the same time;

[0096] 2) Stop the automatic feeding program at the same time;

[0097] 3) At the same time, a stop command is issued through the programmable logic controller to stop the double screw distributor 4, the shaftless feeding screw A5, the Z-type elevator 6, the belt scale 7, the poke push rod A13, the poke push rod B14, the shaftless feeding screw B17, and the vertical feeding screw 18;

[0098] 4) Close the pneumatic gate valve A9, the pneumatic gate valve B12 and the nitrogen replacement solenoid valve 11 at the same time;

[0099] 5) If a fire-related fault occurs, the fire-extinguishing nitrogen solenoid valve 15 is opened.

[0100] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

[0101] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A linkage control system for a solid material sealed feeding mechanism, characterized in that: Including programmable logic controller, human-machine interface, double screw distributor, shaftless screw feeder A, Z-type elevator, belt scale, pneumatic gate valve A, pneumatic gate valve B, nitrogen replacement solenoid valve, fire extinguishing nitrogen solenoid valve, poke push rod A, poke push rod B, shaftless screw feeder B, vertical screw feeder, pyrolysis reactor, hopper material level high switch A, hopper material level low switch B, discharge pipe material level high switch C, discharge pipe material level low switch D; The human-machine interaction interface uses a host computer or touch screen to communicate with the programmable logic controller through a network protocol to achieve data exchange; The programmable logic controller controls the double screw distributor, the shaftless screw feeder A, the Z-type elevator, the belt scale, the pneumatic gate valve A, the pneumatic gate valve B, the nitrogen replacement solenoid valve, the fire extinguishing nitrogen solenoid valve, the poke push rod A, the poke push rod B, the shaftless screw feeder B, the vertical screw feeder, and the pyrolysis reactor respectively; the programmable logic controller receives sensor signals from the hopper material level high switch A, the hopper material level low switch B, the discharge pipe material level high switch C, and the discharge pipe material level low switch D; The programmable logic controller controls each module through a frequency converter or an electric drive or a solenoid valve or a direct start drive or directly collects data of each module through a frequency converter or an electric drive or a solenoid valve or a direct start drive or directly.

2. The linkage control system according to claim 1, characterized in that: The human-computer interaction interface can not only display the parameters of the feeding system in real time, but also control the equipment of the feeding system in real time.

3. The linkage control system according to claim 1, characterized in that: The programmable logic controller drives the feeding shaftless screw A through the frequency converter to realize the remote start / stop / speed control function of the feeding shaftless screw A, and receives the operation / fault / speed / current feedback signal of the frequency converter; The programmable logic controller drives the Z-type hoist through the inverter to realize the remote start / stop / speed control function of the Z-type hoist and receive the inverter operation / fault / speed / current feedback signal; The programmable logic controller realizes the remote start and stop control function of the belt scale by electrically driving the belt scale, and receives the operation / fault / real-time weighing signal of the electrical drive; The programmable logic controller controls the air source through the solenoid valve to drive the pneumatic gate valve A, realizes the remote switch command control function of the pneumatic gate valve A, and receives the open / closed position feedback signal of the gate valve travel switch; The programmable logic controller controls the gas source through the solenoid valve to drive the pneumatic gate valve B, realizes the remote switch command control function of the pneumatic gate valve B, and receives the open / closed position feedback signal of the gate valve travel switch; The programmable logic controller directly drives the nitrogen replacement solenoid valve to realize the remote switch command control function of the nitrogen replacement solenoid valve, and receives the open / closed position feedback signal of the solenoid valve travel switch; The programmable logic controller directly drives the fire extinguishing nitrogen solenoid valve to realize the remote switch command control function of the fire extinguishing nitrogen solenoid valve and receive the open / closed position feedback signal of the solenoid valve travel switch; The programmable logic controller drives the material pushing rod A through the electrical direct start to realize the start and stop function of the material pushing rod A, and receives the operation / fault / current signal from the electrical direct start drive; The programmable logic controller drives the material pushing rod B through the electrical direct start to realize the start and stop function of the material pushing rod B, and receives the operation / fault / current signal from the electrical direct start drive; The programmable logic controller drives the feeding shaftless screw B through the frequency converter to realize the remote start / stop / speed control function of the feeding shaftless screw B, and receives the operation / fault / speed / current feedback signal of the frequency converter; The programmable logic controller drives the feeding vertical screw through electrical direct start to realize the start and stop function of the feeding vertical screw and receives the operation / fault / current signal from the direct start drive; The programmable logic controller drives the pyrolysis reactor through a frequency converter to realize the start / stop / speed control function of the pyrolysis reactor and receives operation / fault / speed / current feedback signals from the frequency converter.

4. The linkage control system according to claim 1, characterized in that: The start-up runtime control method is as follows: 1) Start the pyrolysis reactor and set the operating frequency; 2) Start the feeding vertical screw and set the working frequency; 3) Start the feeding shaftless screw B and set the operating frequency; 4) Start the operation of the material pushing rod A and the material pushing rod B; 5) Start the belt scale operation; 6) Start the automatic feeding system. The first step of automatic feeding is to close the gate valve B. After the gate valve B is fully closed, the next step will be automatically carried out; 7) Start the automatic feeding system. The second step of automatic feeding is to open the gate valve A. After the gate valve A is fully opened, the next step will be automatically carried out; 8) Start the automatic feeding system. The third step of the automatic feeding is to open the nitrogen replacement solenoid valve. After the nitrogen replacement solenoid valve is fully opened, the next step is automatically performed; 9) Start the automatic feeding system. In the fourth step of automatic feeding, start the Z-type elevator, the shaftless feeding screw A, and the double-screw distributor in sequence. After running, the feeding time is controlled by time control and material level. The time control logic is to set the timer T1 to start timing, and the feeding ends when the time reaches T1; the material level control logic is to judge through the material level high switch C of the feeding pipe. When material is detected, the feeding is judged to be finished; after the feeding is finished, the double-screw distributor, the shaftless feeding screw A, and the Z-type elevator are stopped in sequence, and the next step is automatically carried out after all are stopped; 10) Start the automatic feeding system, the fifth step of automatic feeding, set the delay time T2, close the gate valve A after the automatic delay time is up, and automatically proceed to the next step after the gate valve A is closed; 11) Start the automatic feeding system, the sixth step of automatic feeding, close the nitrogen replacement valve, and automatically proceed to the next step after the nitrogen replacement valve is closed; 12) Start the automatic feeding system, the seventh step of automatic feeding, open the gate valve B, and the next step will be automatically carried out after the gate valve B is fully opened; 13) Start the automatic feeding system. In the eighth step of automatic feeding, the feeding status of the solid material is judged, which is realized through time control judgment and material level control judgment. The time control judgment sets the automatic timing T3. When the timing T3 is reached, the feeding is judged to be finished; the material level control judgment is judged by the material level low switch D of the feeding pipe. When the material level detection result is no material, the feeding is judged to be finished; after the feeding is finished, the next step is automatically carried out; 14) Start the automatic feeding system, the ninth step of automatic feeding, close the gate valve B, after the gate valve B is fully closed, enter the next round of cyclic feeding process, that is, return to step 6) to continue the automatic feeding system.

5. The linkage control system according to claim 4, characterized in that: The hopper material level high switch A and the hopper material level low switch B are set in the feed hopper to judge the material amount in the hopper, and normally it is kept in the state of low level with material and high level without material.

6. The linkage control system according to claim 4, characterized in that: The control method in case of failure is as follows: 1) The human-computer interaction interface provides fault information alarm prompts and emits sound and light alarms at the same time; 2) Stop the automatic feeding program at the same time; 3) At the same time, a stop command is issued through the programmable logic controller to stop the double screw distributor, the shaftless screw A for feeding, the Z-type elevator, the belt scale, the pushing rod A for poking the material, the pushing rod B for poking the material, the shaftless screw B for feeding, and the vertical screw for feeding; 4) Close the gate valve A, gate valve B and nitrogen replacement solenoid valve at the same time; 5) If a fire-related fault occurs, open the fire-extinguishing nitrogen solenoid valve.

7. A solid material feeding system, characterized in that: It comprises a hopper, a feeding pipe, and the linkage control system according to claim 1; The hopper is used to store organic solid waste materials after crushing and dehydration, and is provided with a high level switch A and a low level switch B for the hopper to monitor the high and low status of the hopper level in real time. The organic material is transported to the Z-type elevator through the double-screw distributor and the feeding shaftless screw A, and then enters the vertical discharge pipe after real-time weighing through the belt scale. The discharge pipe is provided with high and low level switches, pneumatic gate valve A, pneumatic gate valve B, poke push rod A, and poke push rod B. After passing through the discharge pipe, the material enters the pyrolysis reactor through the feeding shaftless screw B and the feeding vertical screw.

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