A reciprocating mechanical grate furnace and a grate jam determination processing method

Abstract

The present application relates to solid waste treatment technical field, especially a reciprocating mechanical grate furnace and grate jam determination processing method, real-time collection of the motion parameters of the reciprocating grate; based on the above motion parameters, in the automatic mode operation process, the grate jam determination module determines whether the sliding grate of each stage occurs jam failure; if it is determined that the jam failure occurs, the system switches to the automatic emergency processing mode operation, and the grate jam automatic emergency processing module automatically handles the jam failure; when the factors of the jam failure disappear, the motion mode of the sliding grate of this stage is switched to the automatic mode, and the grate jam flag is automatically reset; the reciprocating grate jam is determined, and appropriate automatic emergency processing is made, the influence of mechanical jam caused by metal parts, bricks and stones and the like on the stable and continuous operation of the reciprocating grate furnace is reduced, and the comprehensive benefits of general industrial solid waste treatment plants are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solid waste treatment, in particular to a reciprocating mechanical grate furnace and a grate jam determination and treatment method, which is mainly aimed at a reciprocating grate furnace for general industrial solid waste treatment, and realizes reciprocating grate jam determination and makes appropriate automatic emergency treatment through a set of algorithms. BACKGROUND

[0002] The economic development and urbanization process in China have led to a substantial increase in general industrial solid waste. General industrial solid waste incineration for power generation is an effective way to dispose of it in a harmless, reduced and resourceful manner. The reciprocating mechanical grate furnace is currently the main technical means for treating general industrial solid waste at home and abroad.

[0003] General industrial solid waste is widely sourced from various industries, and has the following characteristics, which have some impact on the treatment process:

[0004] Significant self-characteristics: usually high calorific value and very complex composition. Although the calorific value of the combustible component is usually high, the proportion of non-combustible components is also high, so the slag ratio after combustion is also high.

[0005] Contains specific substances: many solid wastes sent to general industrial treatment plants contain low-melting-point metals; at the same time, they may contain a lot of construction waste such as steel bars and bricks; and when they are unpacked, many iron wires will enter the waste bin along with the solid waste.

[0006] Due to cost considerations, most general industrial solid waste treatment plants do not have sorting and crushing equipment. This results in a significant increase in the probability of mechanical jamming of the reciprocating grate furnace when the above-mentioned metals (low-melting-point metals, steel bars in construction waste, and iron wires used for packing, etc.) enter the furnace. In general, the running personnel need to manually intervene after discovering the jammed grate. If the running personnel do not discover or intervene in time, the jammed grate unit will stop moving for a long time, and the slag will accumulate in the unit, further aggravating the jamming. In such cases, the furnace often needs to be stopped for cleaning, affecting the continuous operation of the system.

[0007] The stable and continuous operation of the reciprocating mechanical grate furnace is directly related to the efficiency of the general industrial solid waste treatment plant, so it is crucial to improve the stability and continuity of the reciprocating mechanical grate furnace. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a reciprocating mechanical grate furnace and a grate jam determination and treatment method that realizes reciprocating grate jam determination and makes appropriate automatic emergency treatment to reduce the impact of mechanical jamming on the stable and continuous operation of the reciprocating grate furnace, in order to solve the problems of the prior art in the above background.

[0009] The technical solution adopted by this invention to solve its technical problem is: a reciprocating mechanical grate furnace, comprising...

[0010] An incinerator is used to burn waste and generate heat.

[0011] The grate is arranged along the length of the incinerator body to form a stepped combustion zone, including alternating multi-stage sliding grates and multi-stage fixed grates. Both ends of the sliding grate are equipped with hydraulic cylinders to synchronously drive the sliding grate to reciprocate. Each hydraulic cylinder is connected to a proportional valve and a shut-off valve, and each hydraulic cylinder has a built-in displacement transmitter.

[0012] The grate jamming detection module is used to detect the grate's operating status parameters in real time and determine whether the grate has jammed based on a preset judgment algorithm.

[0013] The automatic emergency handling module for grate jamming communicates with the grate jamming judgment module and is used to automatically execute a predetermined emergency handling strategy when it receives a jamming fault signal from the grate jamming judgment module.

[0014] Furthermore, the overall reciprocating speed of the grate is the reference speed V. b The speed coefficient K of each sliding grate n K n The value range is 0% to 100%, and the unit speed of the actual reciprocating motion of a single-stage sliding grate is SPEED = V. b ×K n .

[0015] Furthermore, the motion control modes of the grate are divided into manual mode and automatic mode.

[0016] A method for determining and handling jamming in a reciprocating grate furnace, comprising the reciprocating mechanical grate furnace described in any of the above-mentioned embodiments, comprising the following specific steps:

[0017] Step 1: Real-time acquisition of motion parameters of the reciprocating grate;

[0018] Step 2: Based on the above motion parameters, during automatic mode operation, the grate jamming detection module determines whether a jamming fault has occurred in each level of the sliding grate;

[0019] Step 3: If a jamming fault is detected, the system switches to automatic emergency handling mode and the grate jamming automatic emergency handling module performs automatic emergency handling for the jamming fault in Step 2.

[0020] Step 4: When the factors causing the jamming fault disappear, the movement mode of the sliding grate for that stage is switched to automatic mode, and the jamming flag for that stage of the grate is automatically reset.

[0021] The above-mentioned four steps of collection, judgment, processing and recovery form a complete fault handling closed loop, which ensures that the system can independently solve the sticking problem without or with few human interventions, greatly improves the automation level and intelligence of the equipment, and at the same time, clearly switches to the automatic emergency handling mode when a fault occurs, is specially used for handling exceptions, avoids invalid running in the automatic mode, and improves the processing efficiency; after the fault is eliminated, it is automatically recovered to ensure the rapid connection of the normal production process.

[0022] Further, the furnace grate sticking fault judgment logic in step 2 is as follows: in the automatic mode, when each level of sliding furnace grate moves, the travel deviation of the left and right oil cylinders is calculated in real time, and when the deviation is greater than or equal to a set value 1, the system outputs the left and right oil cylinder travel deviation alarm flag of the sliding furnace grate of this level. By calculating the left and right oil cylinder travel deviation in real time and setting the set value, the out-of-sync problem caused by unilateral sticking can be found in time, early warning of the fault is realized, and the specific level of the furnace grate is accurately positioned, which provides a clear target for subsequent processing; when the deviation is less than or equal to a set value 2, the system resets the left and right oil cylinder travel deviation alarm flag of the sliding furnace grate of this level.

[0023] If the left and right oil cylinder travel deviation alarm flag of a certain level of sliding furnace grate exists for a time longer than a set time 1, the set time 1 is used as a judgment condition to effectively filter out false alarms caused by signal jitter or transient interference, greatly improving the accuracy and reliability of fault judgment, and avoiding unnecessary emergency response of the system. Or, the one-way single sliding consumption time in the automatic mode is accumulated as T1, and when T1 exceeds 1.5 times of the expected time T2 of single sliding in the automatic mode, the system outputs the sticking flag of the sliding furnace grate of this level, and the judgment threshold is associated with the expected time T2 of single sliding in the automatic mode, so that the judgment standard can be automatically adjusted according to the current set furnace grate speed, and the accuracy of judgment can be maintained at different running speeds, which has self-adaptive ability.

[0024] Further, in step 3, the automatic emergency handling of the furnace grate sticking fault is performed in the automatic emergency handling mode, and the handling logic is as follows:

[0025] When the furnace grate sticking flag exists for a long time, the left and right oil cylinder travel deviation is calculated in real time, and if the left and right oil cylinder travel deviation alarm flag of a certain level of sliding furnace grate exists for a time longer than a set value 3;

[0026] Or,

[0027] When the forward movement time T3 has exceeded 0.75 times of the expected time T2 of single sliding in the automatic mode, the system automatically gives a manual backward command of the sliding furnace grate of this level, and the proportional valve given value is obtained according to 1.5 times of the automatic mode unit speed;

[0028] Both the deviation duration timeout and the forward duration timeout will trigger the processing action, ensuring the timeliness of system response and preventing the deterioration of failure;

[0029] The proportional valve value is given by table lookup and 1.5 times the unit speed, which means that when emergency processing is performed, the thrust or speed will be increased to compensate for the reduced reciprocating motion stroke caused by mechanical jamming, so as to increase the frequency of reciprocating motion and reduce the impact of the reduced pushing speed of fuel on the furnace bed and the stirring intensity.

[0030] Further, in the backward motion state in step 3, the automatic emergency processing logic for the grate jamming fault under the automatic emergency processing mode is as follows:

[0031] Under the condition that the grate jamming flag persists, the left and right cylinder stroke deviations are calculated in real time, and if the left and right cylinder stroke deviation alarm flags of a certain level of sliding grate persist for more than 4 set values,

[0032] Or,

[0033] When the backward motion duration T4 has exceeded 0.75 times the automatic mode single sliding expected duration T2, the system automatically gives a manual forward instruction for the sliding grate, and the proportional valve given value is obtained by table lookup at 1.5 times the automatic mode unit speed,

[0034] The coping strategy when jamming occurs in the backward direction is provided, which is combined with the forward motion state to form a complete emergency processing scheme covering both forward and backward motion directions, ensuring that the system can make a quick, powerful and reasonable automatic response regardless of the direction of jamming.

[0035] Further, the automatic mode single sliding expected duration T2 in steps 2 and 3 is calculated from the cylinder stroke unit speed of the sliding grate, so that the core judgment threshold T2 is a dynamic value that changes with the system set speed (Vb×Kn), which makes the entire judgment system have self-adaptive ability, and can make reasonable judgments regardless of the speed of the grate, improving the universality and accuracy of the system.

[0036] Further, the automatic emergency treatment mode is the movement of the manual mode under the condition that the grate jamming flag persists, which skillfully utilizes the instruction channel and function basis of the manual mode to realize the automatic emergency treatment without developing a new control channel, thereby saving the hardware cost and software development workload and improving the integration and reliability of the system; the external manual instruction includes a manual forward instruction, a manual backward instruction, a manual stop instruction and a manual given opening, the automatic emergency treatment mode borrows the manual forward instruction and the manual backward instruction of the manual mode to realize the reciprocating movement, and the manual forward instruction, the manual backward instruction and the proportional valve given value are automatically given by the system according to the logical judgment. Meanwhile, the mode can still accept the external manual instruction from the human-machine interface, and combines the automatic treatment with the advanced manual intervention, thereby providing an intervention way for the operator when the system automatic treatment fails to solve the problem, and increasing the flexibility and reliability of the system.

[0037] Further, the given value of the proportional valve is obtained by table lookup method according to 1.5 times of the movement speed Vb x Kn of the grate unit, which means that the pushing force or speed will be increased to compensate the influence of the reciprocating movement stroke reduction on the fuel pushing speed and stirring intensity on the grate bed caused by the mechanical jamming through the reciprocating movement with higher frequency.

[0038] Further, the automatic emergency treatment mode switching to the automatic mode in step 4 is as follows:

[0039] When the operator of the monitor determines that the factors of the jamming failure disappear and the grate can realize the full-range reciprocating movement, the movement mode of the grate can be switched to the automatic mode through the human-machine interface, and the grate jamming flag is automatically reset;

[0040] Or,

[0041] In the automatic emergency treatment mode, if the system records that the left and right oil cylinders of the grate are continuously and alternately advanced to the position and retreated to the position for multiple times, the system automatically switches the movement mode of the grate to the automatic mode, the grate jamming flag is automatically reset, the fault tolerance and high autonomy of the system are embodied, and the system is prevented from being in the emergency state for a long time due to the flag error.

[0042] The beneficial effects of the present application are as follows:

[0043] 1) The reciprocating grate furnace of the present application comprises multiple levels of sliding grates and multiple levels of fixed grates arranged alternately, the reciprocating movement of each level of sliding grate is driven by two hydraulic cylinders arranged outside the furnace on both sides, the forward and backward movement of the oil cylinder is controlled by a proportional valve, and the movement speed of the oil cylinder is also controlled; the safety protection is provided by shutting off the oil path through the emergency shut-off valve; when the deviation of the two oil cylinders is too large, the synchronization of the two oil cylinders is improved by shutting off the unilateral shut-off valve; the stable, efficient and energy-saving operation of the grate is realized, at the same time, the frequency of manual intervention of the operation personnel is reduced, the maintenance cost is reduced, and the overall performance of the equipment is improved;

[0044] 2) The reciprocating grate jam determination and appropriate automatic emergency treatment are realized, the influence of mechanical jam caused by metal parts, masonry and the like on the stable and continuous operation of the reciprocating grate furnace is reduced, the operation stability and continuity of the reciprocating mechanical grate are improved, and the comprehensive benefit of the general industrial solid waste treatment plant is improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] The present application will be further described below in combination with the drawings and examples.

[0046] Figure 1 is a structural schematic diagram of the reciprocating mechanical grate furnace of the present application;

[0047] Figure 2 is a flow chart of the reciprocating grate jam determination and treatment method of the present application;

[0048] Figure 3 is a logic diagram of the reciprocating grate jam determination of the present application;

[0049] Figure 4 is a control logic diagram of the automatic emergency treatment mode of the present application;

[0050] Figure 5 is a switching logic diagram from the automatic emergency treatment mode to the automatic mode of the present application;

[0051] In the drawings: 1. sliding grate, 2. oil cylinder, 3. proportional valve, 4. shut-off valve, 5. displacement transducer, 6. grate jam determination module, 7. grate jam automatic emergency treatment module. DETAILED DESCRIPTION

[0052] The present application will be further described below in combination with the drawings and examples. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present application in a schematic manner, and therefore only show the configurations related to the present application.

[0053] As shown in a reciprocating mechanical grate furnace, Figure 1 comprises

[0054] The incinerator is used to burn waste and generate heat. The motion control mode of the grate is divided into manual mode and automatic mode. In manual mode, the forward and backward movement speed is controlled by determining the oil supply rate of the two proportional valves 3 according to the manual set value.

[0055] The grate is arranged along the length of the incinerator body to form a stepped combustion zone, including alternating multi-stage sliding grates 1 and multi-stage fixed grates. Adjacent fixed grates and sliding grates 1 constitute an independent unit. The fixed grate is fixedly installed on the furnace body support to support the fuel and guide the combustion airflow. The sliding grate 1 is driven by a hydraulic cylinder to reciprocate above the fixed grate to push and stir the fuel.

[0056] Both ends of the sliding grate 1 are equipped with hydraulic cylinders 2 to synchronously drive the sliding grate 1 to reciprocate. Each hydraulic cylinder 2 is connected to a proportional valve 3 and a shut-off valve 4, and each hydraulic cylinder 2 has a built-in displacement transmitter 5.

[0057] Among them, the proportional valve 3 controls the direction (forward / reverse oil supply) and flow rate (opening degree) of the oil circuit, thereby controlling the forward and backward movement of the oil cylinder 2, and controlling the movement speed of the oil cylinder 2;

[0058] Shut-off valve 4 cuts off the oil circuit in an emergency, serving as a safety protection function;

[0059] The displacement transmitter 5 is used to provide real-time feedback on the piston rod displacement in the oil cylinder 2 for closed-loop control to ensure the accuracy of the grate stroke.

[0060] The grate jamming detection module 6 is used to detect the grate's operating status parameters in real time and determine whether the grate has jammed based on a preset judgment algorithm.

[0061] The automatic emergency handling module 7 for grate jamming is connected to the grate jamming judgment module 6 and is used to automatically execute a predetermined emergency handling strategy when receiving a jamming fault signal from the grate jamming judgment module 6.

[0062] Automatic mode is used for daily continuous feeding operation, and the overall reciprocating speed of the grate is the base speed V. b The speed coefficient K of each sliding grate 1 n K n The value range is 0% to 100%. In automatic mode, the actual reciprocating unit speed SPEED of each single-stage sliding grate 1 is V. b ×K n It performs reciprocating motion.

[0063] In the automatic mode, the system detects the positions of the two oil cylinders 2 in real time, and calculates the deviation from the expected stroke (integral of the unit speed over time) respectively. Incremental PID calculation is performed on the deviation, and the adjustment increments of the left and right proportional valves 3 are obtained respectively, so as to realize closed-loop control of the movement speed of the oil cylinder 2.

[0064] As shown in Figures 2 to 5 A reciprocating grate jamming judgment processing method, comprising a reciprocating mechanical grate furnace as claimed in any one of the preceding claims, and the specific steps are as follows:

[0065] Step 1: Real-time acquisition of the motion parameters of the reciprocating grate;

[0066] Step 2: Based on the above motion parameters, the grate jamming judgment module 6 judges whether the grate jamming fault occurs in each stage of the sliding grate 1 during the automatic mode operation;

[0067] Step 3: If it is determined that the grate jamming fault occurs, the system switches to the automatic emergency processing mode operation, and the grate jamming automatic emergency processing module 7 performs automatic emergency processing on the grate jamming fault in step 2;

[0068] Step 4: When the factors of the grate jamming fault disappear, the motion mode of the sliding grate 1 at this stage is switched to the automatic mode, and the grate jamming flag at this stage is automatically reset.

[0069] As shown in Figure 3 The grate jamming fault judgment logic in step 2 is as follows: in the automatic mode, the stroke deviation of the left oil cylinder 2 and the right oil cylinder 2 is calculated in real time when each stage of the sliding grate 1 moves, when the deviation is greater than or equal to 20 mm, the system outputs the left and right oil cylinder stroke deviation alarm flag of the sliding grate 1 at this stage, and when the deviation is less than or equal to 10 mm, the system resets the left and right oil cylinder stroke deviation alarm flag of the sliding grate 1 at this stage; during the left and right oil cylinder stroke deviation alarm, the system automatically closes the stop valve 4 corresponding to the oil cylinder 2 that is relatively ahead in stroke of the sliding grate 1 at this stage, so as to assist in restoring the synchronization of the two oil cylinders 2;

[0070] If the left and right oil cylinder stroke deviation alarm flag of the sliding grate 1 at this stage lasts for more than 20s; or, in the automatic mode, the one-way single sliding consumption time accumulates to T1, when T1 exceeds 1.5 times the expected time T2 of the single sliding in the automatic mode, and the in-place signal of the sliding grate 1 at this stage is still not detected, the system outputs the grate jamming flag of the sliding grate 1 at this stage.

[0071] After the grate jamming occurs, the system will switch to an automatic emergency processing mode operation. The introduction of this automatic emergency processing mode operation can greatly improve the overall continuous operation capability of the reciprocating grate under the condition of local grate jamming, and can also give the operation personnel more preparation time for stopping the furnace for cleaning.

[0072] The automatic emergency handling mode control logic diagram is shown in Figure 4 .

[0073] Specifically, the automatic emergency handling mode is a manual mode movement under the condition that the grate jam flag persists. The automatic emergency handling mode realizes reciprocating movement by borrowing the manual forward command and the manual reverse command of the manual mode, but the manual forward command, the manual reverse command and the proportional valve given value are automatically given by the system according to logical judgment, without the need for human-computer interface input. At the same time, the automatic emergency handling mode can also accept external manual commands from the human-computer interface, including manual forward command, manual reverse command, manual stop command and manual given opening.

[0074] The so-called automatic emergency handling mode can accept manual forward command, manual reverse command and manual stop command input by the human-computer interface for intervention. However, such intervention will not affect the grate jam flag of this level, so artificial intervention will not affect the operation of the automatic emergency handling mode.

[0075] When the automatic emergency handling mode is running, the actual reciprocating stroke of the automatic emergency handling mode is smaller than the reciprocating stroke of the automatic mode of the grate 1 at this level because the grate 1 at this level has jammed at a certain stroke position. The shortened reciprocating stroke will greatly affect the pushing and stirring effect of the reciprocating movement of the grate 1 at this level on the fuel on the hearth, and over time, it will form a pile at the grate 1 at this level. In order to reduce this impact and make the distribution of the material on the hearth more uniform and reasonable, it is necessary to increase the frequency of the reciprocating movement of the grate 1 at this level.

[0076] As shown in Figure 4 , the automatic emergency handling logic for the grate jam fault under the automatic emergency handling mode in the forward movement state in step 3 is as follows:

[0077] Under the condition that the grate jam flag persists, the left and right cylinder stroke deviation is calculated in real time. If the left and right cylinder stroke deviation alarm flag of the grate 1 at this level persists for more than 5s;

[0078] Or,

[0079] When the forward movement time T3 has exceeded 0.75 times of the automatic mode single sliding expected time T2, the system automatically gives the manual reverse command of the grate 1 at this level, and obtains the proportional valve given value according to the automatic mode single unit speed table lookup.

[0080] As shown in Figure 4 , the automatic emergency handling logic for the grate jam fault under the automatic emergency handling mode in the reverse movement state in step 3 is as follows:

[0081] When the grate jamming flag persists, the left and right cylinder stroke deviation is calculated in real time. If the left and right cylinder stroke deviation alarm flag of a certain stage of sliding grate persists for more than 5s,

[0082] Or,

[0083] When the backward movement time T4 has exceeded 0.75 times of the expected single sliding time T2 of the automatic mode, the system automatically gives a manual forward instruction of the stage of sliding grate 1, and the proportional valve given value is obtained by looking up the table at 1.5 times of the unit speed of the automatic mode.

[0084] In the automatic emergency processing mode, the given value of the proportional valve 3 is 1.5 times of the unit movement speed V b ×K n of the stage of grate, which is obtained by looking up the table. In this way, the movement speed of the stage of grate can be improved.

[0085] The above-mentioned table lookup method needs to pre-set the corresponding relationship table.

[0086] In the automatic emergency processing mode, the stage of sliding grate 1 can still realize reciprocating movement. During the reciprocating movement, the jammed iron wire can be cut off, and the jammed bricks and stones can be taken away by the slag. The jam caused by low-melting-point metal solidification can be melted or smoothed again during the reciprocating movement;

[0087] When the above-mentioned jamming factors disappear, the stage of sliding grate 1 can realize full-stroke reciprocating movement. At this time, in order to more accurately realize movement control, the movement mode of the stage of grate can be automatically switched to the automatic mode.

[0088] In step 2 and step 3, the expected single sliding time T2 of the automatic mode is calculated by the cylinder stroke unit speed of the sliding grate 1.

[0089] As shown in Figure 5 When the stage of sliding grate 1 is switched to the automatic mode, the grate jamming flag of the stage of sliding grate 1 is automatically reset. In step 4, the automatic emergency processing mode is switched to the automatic mode, which is specifically:

[0090] When the operator determines that the jamming fault factor disappears, the stage of sliding grate 1 can realize full-stroke reciprocating movement. At this time, in order to more accurately realize movement control, the movement mode of the stage of sliding grate 1 can be switched to the automatic mode through the man-machine interface, and the grate jamming flag of the stage of grate is automatically reset.

[0091] Or,

[0092] In the automatic emergency processing mode, if the system records that the left and right side oil cylinders 2 of the sliding grate 1 advance to the position and retreat to the position alternately appear 3 times in succession, the system automatically switches the movement mode of the sliding grate 1 to the automatic mode, and the sliding grate jam flag is automatically reset.

[0093] The above is the ideal embodiment according to the present application, and the related personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A reciprocating grate jam determination process method, comprising a reciprocating mechanical grate furnace, characterized by: The reciprocating mechanical grate furnace comprises a waste incinerator for burning waste and generating heat; a grate arranged along the length direction of the incinerator body to form a stepped combustion area, comprising multiple levels of sliding grates (1) and multiple levels of fixed grates arranged alternately, both ends of each sliding grate (1) being provided with an oil cylinder (2) for synchronously driving the sliding grate (1) to reciprocate, each oil cylinder (2) being connected with a proportional valve (3) and a stop valve (4), and each oil cylinder (2) being internally provided with a displacement transmitter (5); a grate jamming judgment module (6) for detecting the running state parameters of the grate in real time and judging whether the grate has a jamming fault according to a preset judgment algorithm; a grate jamming automatic emergency treatment module (7) in communication connection with the grate jamming judgment module (6) for automatically executing a predetermined emergency treatment strategy when receiving a jamming fault signal sent by the grate jamming judgment module (6); The overall reciprocating speed of the grate is the reference speed V b The speed coefficient K of each sliding grate (1) n The value range of K n is 0% to 100%, and the actual reciprocating unit speed SPEED of the single-stage sliding grate (1) is SPEED = V b × K n ; the movement control mode of the grate being divided into a manual mode and an automatic mode; the specific steps being as follows: Step 1: real-time acquisition of the movement parameters of the reciprocating grate; Step 2: based on the movement parameters of Step 1, the grate jamming judgment module (6) judges whether each level of sliding grate (1) has a jamming fault during the automatic mode operation; Step 3: if it is judged that a jamming fault occurs, the system is switched to the automatic emergency treatment mode operation, and the grate jamming automatic emergency treatment module (7) automatically performs emergency treatment on the jamming fault of Step 2; Step 4: when the factors causing the jamming fault disappear, the movement mode of the level of sliding grate (1) is switched to the automatic mode, and the jamming flag of the level of grate is automatically reset; the judgment logic of the grate jamming fault in Step 2 being as follows: in the automatic mode, the stroke deviation of the left oil cylinder (2) and the right oil cylinder (2) is calculated in real time when each level of sliding grate (1) moves, when the deviation is greater than or equal to a set value 1, the system outputs the left and right oil cylinder stroke deviation alarm flag of the level of sliding grate (1), and when the deviation is less than or equal to a set value 2, the system resets the left and right oil cylinder stroke deviation alarm flag of the level of sliding grate (1); if the left and right oil cylinder stroke deviation alarm flag of the level of sliding grate (1) continuously exists for a time length exceeding a set time length 1, or, the one-way single sliding consumption time accumulates to T1 in the automatic mode, when T1 exceeds 1.5 times of the expected consumption time T2 of the single sliding in the automatic mode, and the in-place signal of the level of sliding grate (1) is still not detected, the system outputs the jamming flag of the level of sliding grate (1); the automatic emergency treatment logic of the grate jamming fault in the forward movement state in Step 3 being as follows: in the automatic emergency treatment mode operation, the left and right oil cylinder stroke deviation is calculated in real time when the jamming flag continuously exists, if the left and right oil cylinder stroke deviation alarm flag of the level of sliding grate (1) continuously exists for a time length exceeding a set value 3; or, when the forward movement time T3 has exceeded 0.75 times of the expected consumption time T2 of the single sliding in the automatic mode, the system automatically gives a manual backward instruction of the level of sliding grate (1), and the proportional valve given value is obtained according to 1.5 times of the automatic mode unit speed. The automatic emergency treatment logic for the grate jam fault in the automatic emergency treatment mode in the backward movement state in step 3 is as follows: When the grate jam sign persists, the left and right cylinder stroke deviations are calculated in real time, and if the left and right cylinder stroke deviation alarm sign of a sliding grate persists for more than 4 set values, Or, When the backward movement time T4 has exceeded 0.75 times of the automatic mode single sliding expected time T2, the system automatically gives the sliding grate (1) a manual forward instruction, and the proportional valve given value is obtained by looking up the table at 1.5 times of the automatic mode unit speed.

2. The method of claim 1, wherein: The automatic mode single sliding expected time T2 in steps 2 and 3 is calculated by the cylinder stroke unit speed of the sliding grate (1).

3. The method of claim 1, wherein: The automatic emergency treatment mode is the manual mode movement under the condition that the grate jam sign persists, and the automatic emergency treatment mode realizes the reciprocating movement by borrowing the manual forward instruction and the manual backward instruction of the manual mode. The manual forward instruction, the manual backward instruction and the proportional valve given value are all automatically given by the system according to the logic judgment.

4. The method of claim 3, wherein: The set value of the proportional valve (3) is 1.5 times the movement speed V of the stage grate unit b × K n Obtained by table lookup.

5. The method of claim 1, wherein: The automatic emergency treatment mode is switched to the automatic mode in step 4, which is specifically as follows: When the monitor operator judges that the jam fault factor disappears and the sliding grate (1) can realize full reciprocating movement, the movement mode of the sliding grate (1) is switched to the automatic mode through the man-machine interface, and the grate jam sign of the sliding grate (1) is automatically reset; Or, In the automatic emergency treatment mode, if the system records that the left and right side cylinders (2) of the sliding grate (1) are continuously and alternately advanced to the position and retreated to the position for many times, the system automatically switches the movement mode of the sliding grate (1) to the automatic mode, and the grate jam sign of the sliding grate (1) is automatically reset.

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