Calculation method, system and incinerator for thickness of material layer on surface of water-cooled grate

Abstract

The present invention belongs to the technical field of general industrial waste incineration treatment, and specifically relates to a method, system and incinerator for calculating the thickness of a material layer on the surface of a water-cooled grate, wherein the method for calculating the thickness of a material layer on the surface of a water-cooled grate comprises: obtaining the pressure loss caused by air distribution holes when the waste incineration grate is unloaded; performing temperature compensation according to the pressure loss; performing reference air volume correction according to the temperature compensation to obtain a lamination flow compensation value; obtaining a lamination moving average value according to the lamination flow compensation value; and obtaining the average layer thickness deviation of the waste, thereby overcoming the shortcomings of the existing method of judging the accumulation thickness of the waste material layer on the grate surface according to the change in the pressure of the wind chamber of the grate waste incineration boiler or the pressure difference between the wind chamber pressure and the furnace, thereby adjusting the movement speed of the grate and adjusting the amount of waste entering the furnace, and obtaining a reasonable judgment of the waste layer thickness after compensation calculation of temperature, flow, etc., and then giving ACC The automatic adjustment system provides a basis for calculation, improves the automation utilization rate, and reduces the labor intensity of personnel.

Description

Technical Field

[0001] The invention belongs to the technical field of general industrial waste incineration treatment, and specifically relates to a method and system for calculating the thickness of a material layer on the surface of a water-cooled grate, and an incinerator. Background Art

[0002] In the mechanical grate furnace for waste incineration, it is very important to ensure that the thickness of the material layer on the surface of the incineration grate is uniform. If the material layer is too thick, it will lead to incomplete combustion and unstable combustion. If the material layer is too thin, it will reduce the processing capacity of the incinerator and affect the boiler load. However, the thickness of the material layer on the surface of the incineration grate is often difficult to detect directly. The operator can only make a comprehensive judgment on the thickness of the garbage accumulation on the grate surface based on the furnace pressure, wind chamber pressure, furnace tile temperature, and fire viewing holes. Therefore, ensuring the uniform thickness of the material layer on the surface of the incineration grate is a very experienced job, which increases the requirements for personnel and work intensity.

[0003] The change of wind chamber pressure is closely related to the size of primary air volume and primary air temperature. At the same time, the resistance of the grate surface is much greater than the resistance of the garbage layer. The resistance change of the garbage layer cannot be directly reflected in the pressure difference between the wind chamber and the furnace, that is, the pressure difference between the wind chamber and the furnace cannot directly represent the thickness of the garbage layer.

[0004] Therefore, based on the above technical problems, it is necessary to design a new method, system and incinerator for calculating the thickness of the material layer on the surface of the water-cooled grate. Summary of the invention

[0005] The purpose of the present invention is to provide a method and system for calculating the thickness of a material layer on the surface of a water-cooled grate and an incinerator.

[0006] In order to solve the above technical problems, the present invention provides a method for calculating the thickness of a material layer on the surface of a water-cooled grate, comprising:

[0007] Obtain the pressure loss caused by the air distribution holes when the waste incinerator is empty;

[0008] Temperature compensation based on pressure loss;

[0009] Correct the reference air volume according to temperature compensation to obtain the lamination flow compensation value;

[0010] Obtaining a laminar pressure moving average value according to the laminar pressure flow compensation value; and

[0011] Get the average layer thickness deviation of garbage.

[0012] Furthermore, the method for obtaining the pressure loss caused by the air distribution holes when the waste incinerator is unloaded includes:

[0013] Get the no-load differential pressure of all grate units, that is

[0014] NDp0L = NPTL–PT;

[0015] NDp0R = NPTR–PT;

[0016] Among them, NDp0L is the no-load differential pressure on the left side of grate N unit; NPTL is the bottom wind pressure on the left side of grate N unit; PT is the incineration furnace pressure; NDp0R is the no-load differential pressure on the right side of grate N unit; NPTR is the bottom wind pressure on the right side of grate N unit.

[0017] Further, the method for performing temperature compensation according to pressure loss includes:

[0018]

[0019]

[0020] Among them, NTDpL is the temperature compensation value of the garbage layer pressure on the left side of grate N unit; NDpSL is the measured differential pressure when the left side of grate N unit is in operation; NDp0L is the no-load differential pressure on the left side of grate N unit; NTDpR is the temperature compensation value of the garbage layer pressure on the right side of grate N unit; NDpSR is the measured differential pressure when the right side of grate N unit is in operation; NDp0R is the no-load differential pressure on the right side of grate N unit; TT is the primary air temperature.

[0021] Furthermore, the method for obtaining a lamination flow compensation value by correcting the reference air volume according to temperature compensation includes:

[0022]

[0023]

[0024] Among them, NQDpL is the garbage layer pressure flow compensation value on the left side of grate N unit; NTDpL is the garbage layer pressure temperature compensation value on the left side of grate N unit; A LN B is the conversion coefficient of the reference air volume on the left side of grate N unit; LN C is the conversion coefficient of the reference air volume on the left side of grate N unit; LN is the conversion coefficient of the reference air volume on the left side of grate N unit; NFBL is the design reference air volume on the left side of grate N unit; NFL is the measured air volume after temperature and pressure compensation on the left side of grate N unit; NQDpR is the garbage layer pressure flow compensation value on the right side of grate N unit; NTDpR is the garbage layer pressure temperature compensation value on the right side of grate N unit; A RN B is the conversion coefficient of the reference air volume on the right side of grate N unit; RN C is the conversion coefficient of the reference air volume on the right side of grate N unit; RN is the conversion coefficient of the reference air volume on the right side of grate N unit; NFBR is the design reference air volume on the right side of grate N unit; NFR is the measured air volume after temperature and pressure compensation on the right side of grate N unit.

[0025] Further, the method for obtaining the lamination moving average value according to the lamination flow compensation value includes:

[0026]

[0027]

[0028] Among them, NDpL is the moving average value of the garbage layer pressure on the left side of grate N unit; NQDpL is the garbage layer pressure flow compensation value on the left side of grate N unit; n is the moving average time of garbage layer pressure; NDpR is the moving average value of the garbage layer pressure on the right side of grate N unit; NQDpR is the garbage layer pressure flow compensation value on the right side of grate N unit.

[0029] Furthermore, the method for obtaining the average layer thickness deviation of garbage includes:

[0030]

[0031] If ABS(NDL)≤NSETL, the thickness of the garbage layer on the left side of grate N unit meets the requirements;

[0032] If NDL>NSETL, the garbage layer thickness on the left side of grate N unit is too thick;

[0033] If NDL<-NSETL, the garbage layer thickness on the left side of grate N unit is thin;

[0034]

[0035] If ABS(NDR)≤NSETR, the thickness of the garbage layer on the right side of grate N unit meets the requirements;

[0036] If NDR>NSETR, the garbage layer thickness on the right side of grate N unit is too thick;

[0037] If NDR<-NSETR, the garbage layer thickness on the right side of grate N unit is thin;

[0038] Among them, NDL is the thickness of the garbage layer on the left side of grate N unit; ABS is calculated by taking the absolute value; NDpL is the moving average value of the garbage layer pressure on the left side of grate N unit; NDpGL is the target value of the garbage layer pressure on the left side of grate N unit; NSETL is the target deviation of the garbage layer thickness on the left side of grate N unit; NDR is the thickness of the garbage layer on the right side of grate N unit; NDpR is the moving average value of the garbage layer pressure on the right side of grate N unit; NDpGR is the target value of the garbage layer pressure on the right side of grate N unit; NSETR is the target deviation of the garbage layer thickness on the right side of grate N unit.

[0039] In a second aspect, the present invention further provides a system for calculating the thickness of a material layer on a surface of a water-cooled grate, comprising:

[0040] The pressure loss acquisition module acquires the pressure loss caused by the air distribution holes when the waste incinerator is empty;

[0041] Temperature compensation module, which performs temperature compensation according to pressure loss;

[0042] The lamination flow compensation module corrects the reference air volume according to the temperature compensation to obtain the lamination flow compensation value;

[0043] A lamination moving average module, which obtains a lamination moving average value according to a lamination flow compensation value; and

[0044] Layer thickness deviation module, obtains the average layer thickness deviation of garbage.

[0045] In a third aspect, the present invention further provides an incinerator, comprising:

[0046] A plurality of grate units, a control module, and a detection module electrically connected to the control module;

[0047] The detection module is suitable for detecting parameters of each grate unit;

[0048] The control module is suitable for obtaining the average layer thickness deviation of garbage of each grate unit according to the parameters of each grate unit.

[0049] The beneficial effects of the present invention are as follows: the present invention obtains the pressure loss caused by the air distribution holes when the garbage incineration grate is unloaded; performs temperature compensation according to the pressure loss; performs reference air volume correction according to the temperature compensation to obtain a lamination flow compensation value; obtains a lamination moving average value according to the lamination flow compensation value; and obtains an average garbage layer thickness deviation, thereby overcoming the shortcomings of the existing method of judging the accumulation thickness of the garbage material layer on the grate surface according to the change in the pressure of the wind chamber of the grate garbage incineration boiler or the pressure difference between the wind chamber pressure and the furnace, thereby adjusting the movement speed of the grate and the amount of garbage entering the furnace, and obtains a reasonable garbage layer thickness judgment after compensation calculation of temperature, flow, etc., thereby providing a calculation basis for the ACC automatic adjustment system, improving the automation utilization rate, and reducing the labor intensity of personnel.

[0050] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0051] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 It is a flow chart of the method for calculating the thickness of the material layer on the surface of the water-cooling grate involved in the present invention;

[0054] Figure 2 is a schematic diagram of a grate unit involved in the present invention;

[0055] Figure 3 It is a grate pressure difference line graph involved in the present invention;

[0056] Figure 4 The present invention is a block diagram of the principle of the system for calculating the thickness of the material layer on the surface of the water-cooling grate.

[0057] In the figure:

[0058] 1 is grate 1 unit, 2 is grate 2 unit, 3 is grate 3 unit, 4 is grate 4 unit, and 5 is grate 5 unit. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] Example 1

[0061] Figure 1 The present invention is a flow chart of a method for calculating the thickness of a material layer on the surface of a water-cooled grate.

[0062] like Figure 1As shown, this embodiment 1 provides a method for calculating the thickness of the material layer on the surface of a water-cooled grate, including: obtaining the pressure loss caused by the air distribution holes when the garbage incineration grate is unloaded; performing temperature compensation according to the pressure loss; performing reference air volume correction according to the temperature compensation to obtain a lamination flow compensation value; obtaining a lamination moving average value according to the lamination flow compensation value; and obtaining the average layer thickness deviation of garbage, thereby overcoming the shortcomings of the existing method of judging the accumulation thickness of the garbage material layer on the grate surface according to the change in the pressure of the grate garbage incineration boiler wind chamber or the pressure difference between the wind chamber pressure and the furnace, thereby adjusting the movement speed of the grate and the amount of garbage entering the furnace, and obtaining a reasonable judgment of the garbage layer thickness after compensation calculation of temperature, flow, etc., thereby providing a calculation basis for the ACC automatic adjustment system, improving the automation utilization rate, and reducing the labor intensity of personnel.

[0063] Figure 2 is a schematic diagram of a grate unit involved in the present invention;

[0064] Figure 3 It is a grate pressure difference line graph involved in the present invention.

[0065] like Figure 2 and Figure 3 As shown, in this embodiment, the method for obtaining the pressure loss caused by the air distribution holes when the waste incineration grate is unloaded includes: obtaining the unloaded differential pressure of all grate units, that is,

[0066] NDp0L = NPTL–PT;

[0067] NDp0R = NPTR–PT;

[0068] Among them, NDp0L is the no-load differential pressure on the left side of grate N unit, in Pa; NPTL is the bottom wind pressure on the left side of grate N unit, ranging from 0-5000Pa; PT is the incineration furnace pressure, ranging from -2000 to +2000Pa; NDp0R is the no-load differential pressure on the right side of grate N unit; NPTR is the bottom wind pressure on the right side of grate N unit; N is the number of grate units, and the incineration grate as a whole can be divided into five units along the longitudinal direction, namely grate 1 unit, grate 2 unit, grate 3 unit, grate 4 unit and grate 5 unit. The bottom part of each unit of the incineration furnace is divided into two left and right wind chambers horizontally, according to the primary wind of the bottom of the furnace. The thickness of the garbage layer corresponding to each wind chamber is calculated based on the pressure, flow rate, and pressure in the furnace, and it is determined whether the thickness is appropriate; in the no-load test run stage of the incinerator, the frequency of the primary fan of each unit is changed respectively, the air flow rate is changed, and then a broken line chart is made according to the wind chamber pressure and the furnace pressure; the grate differential pressure is the pressure of the wind chamber under the furnace - the pressure in the furnace; the flow values ​​obtained by the corresponding fan frequency opening of 0, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, the measurement conditions can be that the grate is in a neutral position, there is no garbage in the furnace, the pressure in the furnace is constant, and the primary air temperature is constant.

[0069] In this embodiment, the method for performing temperature compensation according to pressure loss includes:

[0070]

[0071]

[0072] Among them, NTDpL is the temperature compensation value of the garbage layer on the left side of grate N unit, in Pa; NDpSL is the measured differential pressure when the left side of grate N unit is in operation, in Pa; NDp0L is the no-load differential pressure on the left side of grate N unit, in Pa; NTDpR is the temperature compensation value of the garbage layer on the right side of grate N unit; NDpSR is the measured differential pressure when the right side of grate N unit is in operation; NDp0R is the no-load differential pressure on the right side of grate N unit; TT is the primary air temperature.

[0073] In this embodiment, the method for performing reference air volume correction according to temperature compensation to obtain a laminar flow compensation value includes:

[0074]

[0075]

[0076] Among them, NQDpL is the garbage layer pressure flow compensation value on the left side of grate N unit, in Pa; NTDpL is the garbage layer pressure temperature compensation value on the left side of grate N unit, in Pa; A LN B is the reference air volume conversion coefficient (secondary) on the left side of grate N unit; LN C is the conversion coefficient of the reference air volume on the left side of grate N unit (once); LN is the conversion coefficient (intercept) of the reference air volume on the left side of the grate N unit; NFBL is the design reference air volume on the left side of the grate N unit, in Nm 3 / h; NFL is the measured air volume after temperature and pressure compensation on the left side of grate N unit, in Nm 3 / h; NQDpR is the garbage layer pressure flow compensation value on the right side of grate N unit; NTDpR is the garbage layer pressure temperature compensation value on the right side of grate N unit; A RN B is the conversion coefficient of the reference air volume on the right side of grate N unit; RN C is the conversion coefficient of the reference air volume on the right side of grate N unit; RN is the conversion coefficient of the reference air volume on the right side of grate N unit; NFBR is the design reference air volume on the right side of grate N unit; NFR is the measured air volume after temperature and pressure compensation on the right side of grate N unit.

[0077] In this embodiment, the method for obtaining the lamination moving average value according to the lamination flow compensation value includes: the garbage lamination is sampled 6 data per minute with a period of 10 seconds, and the moving average value is calculated for the number of samples every n minutes;

[0078]

[0079]

[0080] Among them, NDpL is the moving average value of the garbage layer pressure on the left side of grate N unit, in Pa; NQDpL is the garbage layer pressure flow compensation value on the left side of grate N unit, in Pa; n is the moving average time of garbage layer pressure, 5 to 30 minutes; NDpR is the moving average value of the garbage layer pressure on the right side of grate N unit; NQDpR is the garbage layer pressure flow compensation value on the right side of grate N unit.

[0081] In this embodiment, the method for obtaining the average layer thickness deviation of garbage includes:

[0082]

[0083] If ABS(NDL)≤NSETL, the thickness of the garbage layer on the left side of grate N unit meets the requirements;

[0084] If NDL>NSETL, the garbage layer thickness on the left side of grate N unit is too thick;

[0085] If NDL<-NSETL, the garbage layer thickness on the left side of grate N unit is thin;

[0086]

[0087] If ABS(NDR)≤NSETR, the thickness of the garbage layer on the right side of grate N unit meets the requirements;

[0088] If NDR>NSETR, the garbage layer thickness on the right side of grate N unit is too thick;

[0089] If NDR<-NSETR, the garbage layer thickness on the right side of grate N unit is thin;

[0090] Among them, NDL is the thickness of the garbage layer on the left side of grate N unit, in Pa; ABS is calculated by taking the absolute value; NDpL is the moving average value of the garbage layer pressure on the left side of grate N unit; NDpGL is the target value of the garbage layer pressure on the left side of grate N unit; NSETL is the target deviation (set value) of the garbage layer thickness on the left side of grate N unit, in percentage (%); NDR is the thickness of the garbage layer on the right side of grate N unit; NDpR is the moving average value of the garbage layer pressure on the right side of grate N unit; NDpGR is the target value of the garbage layer pressure on the right side of grate N unit; NSETR is the target deviation of the garbage layer thickness on the right side of grate N unit; according to the calculation results, it is sent to the ACC control system, and after comprehensive judgment, the action of the feeding and incineration grate is controlled to adjust the thickness of the material layer.

[0091] Example 2

[0092] Figure 4 The present invention is a block diagram of the principle of the system for calculating the thickness of the material layer on the surface of the water-cooling grate.

[0093] like Figure 4 As shown, on the basis of Example 1, this Example 2 also provides a system for calculating the thickness of the material layer on the surface of a water-cooled grate, including: a pressure loss acquisition module, which acquires the pressure loss caused by the air distribution holes when the garbage incineration grate is unloaded; a temperature compensation module, which performs temperature compensation according to the pressure loss; a lamination flow compensation module, which performs reference air volume correction according to the temperature compensation to obtain a lamination flow compensation value; a lamination moving average module, which acquires a lamination moving average value according to the lamination flow compensation value; and a layer thickness deviation module, which acquires the average layer thickness deviation of garbage.

[0094] In this embodiment, the specific functions of each module have been described in detail in Embodiment 1 and will not be repeated in this embodiment.

[0095] Example 3

[0096] Based on Example 1 and Example 2, this Example 3 also provides an incinerator, including: a plurality of grate units, a control module, and a detection module electrically connected to the control module; the detection module is suitable for detecting the parameters of each grate unit; the control module is suitable for obtaining the average layer thickness deviation of garbage in each grate unit according to the parameters of each grate unit.

[0097] In this embodiment, the control module can integrate the functions of various modules of the water-cooled grate surface material layer thickness calculation system.

[0098] In this embodiment, the parameters that can be detected by the detection module may be pressure data of a certain pressure in the furnace, temperature data of a certain primary air temperature, and the like.

[0099] In summary, the present invention obtains the pressure loss caused by the air distribution holes when the garbage incineration grate is unloaded; performs temperature compensation according to the pressure loss; performs reference air volume correction according to the temperature compensation to obtain the lamination flow compensation value; obtains the lamination moving average value according to the lamination flow compensation value; and obtains the average layer thickness deviation of garbage, thereby overcoming the shortcomings of the existing method of judging the accumulation thickness of the garbage material layer on the grate surface according to the change of the pressure in the wind chamber of the grate garbage incineration boiler or the pressure difference between the wind chamber pressure and the furnace, thereby adjusting the movement speed of the grate and the amount of garbage entering the furnace, and obtains a reasonable garbage layer thickness judgment after compensation calculation of temperature, flow, etc., thereby providing a calculation basis for the ACC automatic adjustment system, improving the automation utilization rate, and reducing the labor intensity of personnel.

[0100] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0101] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0102] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0103] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for calculating the thickness of the material layer on the surface of a water-cooled grate, characterized in that: include: Obtain the pressure loss caused by the air distribution holes when the waste incinerator is empty; Temperature compensation based on pressure loss; Correct the reference air volume according to temperature compensation to obtain the lamination flow compensation value; Obtaining a lamination pressure moving average value according to a lamination pressure flow compensation value; as well as Get the average layer thickness deviation of garbage; The method for obtaining the pressure loss caused by the air distribution holes when the waste incinerator is unloaded comprises: Get the no-load differential pressure of all grate units, that is, NDp0L = NPTL – PT; NDp0R = NPTR – PT; Among them, NDp0L is the no-load differential pressure on the left side of grate N unit; NPTL is the bottom wind pressure on the left side of grate N unit; PT is the combustion furnace pressure; NDp0R is the no-load differential pressure on the right side of grate N unit; NPTR is the bottom wind pressure on the right side of grate N unit; The method for performing temperature compensation according to pressure loss comprises: ； ； Among them, NTDpL is the temperature compensation value of the garbage layer on the left side of grate N unit; NDpSL is the measured differential pressure when the left side of grate N unit is in operation; NTDpR is the temperature compensation value of the garbage layer on the right side of grate N unit; NDpSR is the measured differential pressure when the right side of grate N unit is in operation; TT is the primary air temperature.

2. The method for calculating the thickness of the material layer on the surface of the water-cooling grate according to claim 1, characterized in that: The method for obtaining a laminar flow compensation value by correcting the reference air volume according to temperature compensation includes: ； ； Among them, NQDpL is the garbage layer pressure flow compensation value on the left side of grate N unit; A LN B is the conversion coefficient of the reference air volume on the left side of grate N unit; LN C is the conversion coefficient of the reference air volume on the left side of grate N unit; LN is the conversion coefficient of the reference air volume on the left side of grate N unit; NFBL is the design reference air volume on the left side of grate N unit; NFL is the measured air volume after temperature and pressure compensation on the left side of grate N unit; NQDpR is the garbage layer pressure flow compensation value on the right side of grate N unit; A RN B is the conversion coefficient of the reference air volume on the right side of grate N unit; RN C is the conversion coefficient of the reference air volume on the right side of grate N unit; RN is the conversion coefficient of the reference air volume on the right side of grate N unit; NFBR is the design reference air volume on the right side of grate N unit; NFR is the measured air volume after temperature and pressure compensation on the right side of grate N unit.

3. The method for calculating the thickness of the material layer on the surface of the water-cooling grate according to claim 2, characterized in that: The method for obtaining the lamination pressure moving average value according to the lamination pressure flow compensation value comprises: ； ； Among them, NDpL is the moving average value of the garbage layer pressure on the left side of the grate N unit; n is the moving average time of the garbage layer pressure; NDpR is the moving average value of the garbage layer pressure on the right side of the grate N unit.

4. The method for calculating the thickness of the material layer on the surface of the water-cooling grate according to claim 3, characterized in that: The method for obtaining the average layer thickness deviation of garbage comprises: ； like Then the thickness of the garbage layer on the left side of grate N unit meets the requirements; like Then the garbage layer thickness on the left side of grate N unit is relatively thick; like Then the garbage layer thickness on the left side of grate N unit is relatively thin; ； like Then the thickness of the garbage layer on the right side of grate N unit meets the requirements; like Then the garbage layer thickness on the right side of grate N unit is relatively thick; like Then the garbage layer thickness on the right side of grate N unit is relatively thin; Among them, NDL is the thickness of the garbage layer on the left side of grate N unit; ABS is calculated by taking the absolute value; NDpL is the moving average pressure of the garbage layer on the left side of grate N unit; NDpGL is the target pressure of the garbage layer on the left side of grate N unit; NSETL is the target deviation of the thickness of the garbage layer on the left side of grate N unit; NDR is the thickness of the garbage layer on the right side of grate N unit; NDpR is the moving average pressure of the garbage layer on the right side of grate N unit; NDpGR is the target pressure of the garbage layer on the right side of grate N unit; NSETR is the target deviation of the thickness of the garbage layer on the right side of grate N unit.

5. A system for calculating the thickness of a water-cooled grate surface material layer using the method for calculating the thickness of a water-cooled grate surface material layer according to any one of claims 1 to 4, characterized in that: include: The pressure loss acquisition module acquires the pressure loss caused by the air distribution holes when the waste incinerator is empty; Temperature compensation module, which performs temperature compensation according to pressure loss; The lamination flow compensation module corrects the reference air volume according to the temperature compensation to obtain the lamination flow compensation value; The lamination pressure moving average module obtains the lamination pressure moving average value according to the lamination pressure flow compensation value; as well as Layer thickness deviation module, obtains the average layer thickness deviation of garbage.

6. An incinerator, characterized in that: include: A plurality of grate units, a control module, and a detection module electrically connected to the control module; The detection module is suitable for detecting parameters of each grate unit; The control module is suitable for applying the method for calculating the thickness of the material layer on the surface of the water-cooled grate as described in any one of claims 1 to 4, that is, obtaining the average layer thickness deviation of the garbage of each grate unit according to the parameters of each grate unit.

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