Asynchronous automatic adjustment control method for partial combustion of garbage incinerator

Abstract

The invention discloses a garbage incinerator bias combustion asynchronous automatic adjustment control method which comprises the following steps: S1, dividing feeding fire grates into three groups, namely a left side material layer, a middle material layer and a right side material layer, and independently setting the left side material layer thickness, the middle material layer thickness and the right side material layer thickness of a drying section based on the reference material layer thickness of the drying section; s2, the material layer thickness of the incinerator grate unit corresponding to each feeding grate is obtained in real time through a radar level indicator and compared with the material layer thickness of the incinerator grate unit at the previous moment, and the change value of each material layer thickness is accurately calculated; s3, based on the actual measured value of the thickness of the material layer, adjusting the advancing speed of each group of feeding fire grate: when the thickness of the material layer on one side is increased to exceed the set thickness, slowing down the speed of the feeding fire grate of the corresponding group, reducing the thickness of the garbage on the side, and reducing the quantity of the garbage on the side; otherwise, the garbage amount of the side is increased. The problem of partial combustion caused by non-uniform distribution of the material layers can be solved, and uniform distribution of the material layers is realized.

Description

Technical Field

[0001] The invention relates to the technical field of solid waste treatment, and in particular to an asynchronous automatic adjustment control method for biased burning of a garbage incinerator. Background Art

[0002] As an important equipment for treating municipal domestic waste, the operating efficiency and safety of the waste incinerator are of great significance to environmental protection and resource utilization. However, in the actual operation process, the waste incinerator may have a biased burning phenomenon, that is, the flame distribution in the furnace is uneven, and the flame in some areas is too concentrated or too weak. This biased burning phenomenon not only affects the efficiency and effect of waste incineration, but also may damage the equipment and even cause safety accidents.

[0003] The feeding grate control scheme of the existing waste incinerator is that each trolley moves forward and backward synchronously, and the problem of biased burning on site is dealt with by adjusting the stroke of the trolley. However, adjusting the stroke of the trolley can only slightly improve the phenomenon of biased burning, and the effect is not ideal, and the problem of biased burning has not been fundamentally solved. The large grate of the existing waste incinerator is designed to process more than 500 tons per day, but when faced with the challenges of low calorific value of garbage and heavy mechanical load, biased burning occurs frequently, an average of 2 to 3 times a day. Once biased burning occurs, the correction process takes a long time, usually 2 to 3 hours, which not only increases operating costs, but also poses a serious threat to the stable operation of the waste incinerator. It is urgently needed to be optimized and improved to improve its operating efficiency and safety. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide an asynchronous automatic adjustment control method for biased burning of a waste incinerator. By adopting the asynchronous independent operation mode of the feeding grate, the forward speed of each group of feeding grates is accurately controlled according to the change value of the material layer thickness, so as to solve the biased burning problem, achieve uniform distribution of the material layer and improve production efficiency.

[0005] Technical solution: A method for asynchronous automatic adjustment control of biased burning of a garbage incinerator, comprising the following steps:

[0006] S1, divide the feeding grate into three groups: left material layer, middle material layer and right material layer. Based on the reference material layer thickness of the drying section, set the thickness of the left material layer, the thickness of the middle material layer and the thickness of the right material layer of the drying section separately;

[0007] S2, using a radar level meter to obtain the material layer thickness of the incineration grate unit corresponding to each feeding grate in real time, and compare it with the material layer thickness of the incineration grate unit at the previous moment, and accurately calculate the change value of each material layer thickness;

[0008] S3, based on the actual measured value of the material layer thickness, adjust the forward speed of each group of feeding grates: when the material layer thickness on one side increases to more than the set thickness, the feeding grate speed of the corresponding group will slow down, reducing the garbage thickness on this side and reducing the amount of garbage on this side; when the material layer thickness on one side increases to less than the set thickness, the feeding grate speed of the corresponding group will accelerate, increasing the garbage thickness on this side and increasing the amount of garbage on this side.

[0009] Furthermore, the setting values ​​of the left material layer thickness, the middle material layer thickness, and the right material layer thickness of the drying section are as follows:

[0010] The thickness setting value of the left material layer is: H_L_sp=H_sp+H_sp_L_cal

[0011] The setting value of the middle material layer thickness is: H_M_sp=H_sp+H_sp_M_cal

[0012] The thickness setting value of the right material layer is: H_R_sp=H_sp+H_sp_R_cal

[0013] Among them, H_sp is the reference material layer thickness in the drying section, H_sp_L_cal is the correction value for the thickness of the left material layer, H_sp_M_cal is the correction value for the thickness of the middle material layer, and H_sp_R_cal is the correction value for the thickness of the right material layer.

[0014] Further, the calculation of the change value of each material layer thickness is as follows:

[0015] 1) Let L L Set the lower limit of the difference between the thickness of the left material layer and the average thickness of the left material layer detected, H L Set the upper limit of the difference between the thickness of the left material layer and the average thickness of the left material layer. When the thickness of the left material layer meets the following conditions

[0016] H_L_sp-H_L_AVE(k)<L L 、H_L_sp-H_L_AVE(k)>H L When , the expression of the thickness change value Y_L(k) of the left material layer is as follows:

[0017] Y_L(k)=k 1 ×[a 1 +b 1 *H_L_sp-H_L_AVE(k)]

[0018] +k 2 ×[a 2 +b 2 *[H_L_AVE(k)-H_L_AVE(k-1)]]

[0019] H_L_AVE(k)=[H_L(k)+H_L1(k)] / 2

[0020] Among them, H_L(k) is the material layer thickness detection value of the left material level, H_L1(k) is the material layer thickness detection value of the first left material level, H_L_AVE(k) is the average material layer thickness detection value of the left material layer at time k, H_L_sp is the left material layer thickness setting value, H_L_AVE(k-1) is the average material layer thickness detection value of the left material layer at time k-1, k 1 , k 2 are the scale factors, a 1 、b 1 、a 2 、b 2 They are regulating factors;

[0021] 2) Let L M The lower limit of the difference between the set thickness of the middle material layer and the average thickness of the middle material layer detected, H M Set the upper limit of the difference between the thickness of the middle material layer and the average thickness of the middle material layer. When the thickness of the middle material layer meets the following conditions

[0022] H_M_sp-H_M_AVE(k)<L M 、H_M_sp-H_M_AVE(k)>H M When , the expression of the change value of the thickness of the middle material layer Y_M(k) is as follows:

[0023] Y_M(k)=k 3 ×[a 3 +b 3 *H_M_sp-H_M_AVE(k)]

[0024] +k 4 ×[a 4 +b 4 *[H_M_AVE(k)-H_M_AVE(k-1)]]

[0025] H_M_AVE(k)=[H_M_L(k)+H_M_R(k)] / 2

[0026] Among them, H_M_L(k) is the material layer thickness detection value of the middle left material level at time k, H_M_R(k) is the material layer thickness detection value of the middle right material level at time k, H_M_AVE(k) is the average material layer thickness detection value of the middle material level at time k, H_M_sp is the middle material layer thickness setting value, H_M_AVE(k-1) is the average material layer thickness of the middle material level at time k-1, k 3 , k 4 are the scale factors, a 3 、b 3 、a 4、b 4 is the regulating factor;

[0027] 3) Let L R The lower limit of the difference between the set thickness of the right material layer and the average thickness of the right material layer detected, H R Set the upper limit of the difference between the thickness of the right material layer and the average material layer thickness detected on the right side. When the thickness of the left material layer meets the following conditions

[0028] H_R_sp-H_R_AVE(k)<L R 、H_R_sp-H_R_AVE(k)>H R When , the expression of the thickness change value Y_R(k) of the right material layer is as follows:

[0029] Y_R(k)=k 5 ×[a 5 +b 5 *H_R_sp-H_R_AVE(k)]

[0030] +k 6 ×[a 6 +b 6 *[H_R_AVE(k)-H_R_AVE(k-1)]]

[0031] H_R_AVE(k)=[H_R(k)+H_R1(k)] / 2

[0032] Among them, H_R(k) is the material layer thickness detection value of the right material level, H_R1(k) is the material layer thickness detection value of the first right material level, H_R_AVE(k) is the average material layer thickness detection value of the right material level at time k, H_R_sp is the right material layer thickness setting value, H_R_AVE(k-1) is the average material layer thickness of the right material layer detection device at time k-1, k 5 , k 6 are the scale factors, a 5 、b 5 、a 6 、b 6 is the adjustment factor.

[0033] Furthermore, under normal circumstances, the reference material layer thickness of the drying section is set to 0.9 meters, the left material layer thickness correction value is set to 0.0 meters, the middle material layer thickness correction value is set to -0.1 meters, and the right material layer thickness correction value is set to 0.0 meters;

[0034] When left-biased burning occurs, the reference material layer thickness of the drying section is set to 0.9 m, the left material layer thickness correction value is set to -0.05 m, the middle material layer thickness correction value is set to -0.1 m, and the right material layer thickness correction value is set to +0.2 m;

[0035] When right-biased burning occurs, the reference material layer thickness of the drying section is set to 0.9 m, the left material layer thickness correction value is set to 0.2 m, the middle material layer thickness correction value is set to -0.1 m, and the right material layer thickness correction value is set to -0.05 m.

[0036] Furthermore, when biased burning occurs, make adjustments according to the following rules:

[0037] When the thickness difference of the material layer in the left drying area is greater than 0.07m, the speed is reduced by 0.005mm / s. If the difference is still greater than 0.07m after 0.5 seconds, the speed is further reduced by 0.005mm / s. The speed of the left feeding grate is gradually reduced. When the speed of the feeding trolley drops to 0.2mm / s, the speed will no longer be reduced.

[0038] When the thickness difference of the material layer in the left drying area is less than -0.07m, the speed increases by 0.005mm / s. If the difference is still less than 0.07m after 0.5 seconds, the speed continues to increase by 0.005mm / s. The speed of the left feeding grate increases gradually and iteratively. When the speed of the feeding trolley increases to 2.0mm / s, the speed stops increasing.

[0039] When the thickness difference of the drying zone material layer in the middle group is greater than 0.06m, the speed is reduced by 0.005mm / s. If the difference is still greater than 0.06m after 0.5 seconds, the speed is further reduced by 0.005mm / s. The speed of the middle feeding grate is gradually reduced. When the speed of the feeding trolley drops to 0.2mm / s, the speed will no longer be reduced.

[0040] When the thickness difference of the drying zone material layer in the middle group is less than -0.06m, the speed increases by 0.005mm / s. If the difference is still less than 0.06m after 0.5 seconds, the speed continues to increase by 0.005mm / s. The speed of the middle feeding grate increases gradually and iteratively. When the speed of the feeding trolley increases to 2.0mm / s, the speed stops increasing.

[0041] When the thickness difference of the material layer in the right group of drying areas is greater than 0.07m, the speed is reduced by 0.005mm / s. If the difference is still greater than 0.07m after 0.5 seconds, the speed is further reduced by 0.005mm / s. The speed of the feeding grate on the right side is gradually reduced. When the speed of the feeding trolley drops to 0.2mm / s, the speed will no longer continue to decrease.

[0042] When the thickness difference of the material layer in a group of drying areas on the right is less than -0.07m, the speed increases by 0.005mm / s. If the difference is still less than 0.07m after 0.5 seconds, the speed continues to increase by 0.005mm / s. The speed of the feeding grate on the right side increases gradually and iteratively. When the speed of the feeding trolley increases to 2.0mm / s, the speed no longer increases.

[0043] Compared with the prior art, the present invention has the following significant effects:

[0044] The present invention divides a large grate feeding system into three groups through a refined control method. Each group is independently controlled and operated without interfering with each other. This grouping design ensures that each group of feeding grates can be flexibly adjusted, avoiding mutual influence in the traditional synchronous operation mode. At the same time, with the help of a radar level meter, the material layer thickness of the incineration grate unit corresponding to each feeding grate is obtained in real time and compared with the set value. After exceeding the set deviation, it is compared with the material layer thickness at the previous moment to accurately calculate the change value of the material layer thickness, and intelligently monitor and calculate the garbage material layer thickness of the feeding grate. According to the change value of the material layer thickness, the forward speed of each group of feeding grates is accurately controlled to solve the problem of biased burning caused by uneven distribution of the material layer, achieve uniform distribution of the material layer, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the overall process of the present invention;

[0046] Figure 2 It is the control block diagram of the left material layer of the feeding system in asynchronous mode;

[0047] Figure 3 It is the control block diagram of the middle side material layer of the feeding system in asynchronous mode;

[0048] Figure 4 This is the control block diagram of the right material layer of the feeding system in asynchronous mode. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0050] like Figure 1 As shown, the implementation steps of the asynchronous automatic adjustment control method for biased burning of a garbage incinerator of the present invention are as follows:

[0051] Step 1: Group independent control;

[0052] The present invention divides the large grate feeding grate into three groups, each group operates independently without interfering with each other. This grouping design ensures that each group of feeding grates can be flexibly adjusted, avoiding mutual influence in the traditional synchronous operation mode. The specific implementation is as follows:

[0053] Based on the reference material layer thickness of the drying section, the left material layer, middle material layer, and right material layer of the drying section are set separately. Set the reference material layer thickness of the drying section as H_sp, the thickness correction value of the left material layer as H_sp_L_cal, the thickness correction value of the middle material layer as H_sp_M_cal, and the thickness correction value of the right material layer as H_sp_R_cal, then:

[0054] The thickness setting value of the left material layer is: H_L_sp=H_sp+H_sp_L_cal

[0055] The setting value of the middle material layer thickness is: H_M_sp=H_sp+H_sp_M_cal

[0056] The thickness setting value of the right material layer is: H_R_sp=H_sp+H_sp_R_cal

[0057] Step 2: Intelligent monitoring and calculation of material layer thickness;

[0058] By setting up radar level meters on the left, middle and right sides of the same row above the grate, the radar level meter is installed just above the first unit of the incineration grate and coaxial with the moving direction of each feeding trolley. The material layer thickness of the incineration grate unit corresponding to each feeding grate is obtained in real time, and compared with the material layer thickness at the previous moment, the change value of the material layer thickness is accurately calculated.

[0059] (1) Calculation of thickness difference of the left material layer (i.e. thickness change)

[0060] like Figure 2 The figure shows the control block diagram of the left material layer of the feeding system in asynchronous mode, and obtains the current thickness difference Y_L(k) of the left material layer.

[0061] H_L_AVE(k)=[H_L(k)+H_L1(k)] / 2 (1)

[0062] When H_L_sp-H_L_AVE(k)<L L , H_L_sp-H_L_AVE(k)>H L Perform normal calculation to obtain the thickness difference of the current left material layer. The calculation formula is as follows:

[0063]

[0064] Among them, H_L(k) is the material layer thickness detection value of the left material level, H_L1(k) is the material layer thickness detection value of the first left material level, H_L_AVE(k) is the average material layer thickness detection value of the left material layer at time k, H_L_sp is the left material layer thickness setting value, H_L_AVE(k-1) is the average material layer thickness detection value of the left material layer at time k-1, k 1 , k 2 are the scale factors, a 1 、b 1 、a 2 、b 2 are the adjustment factors, L L Set the lower limit of the difference between the thickness of the left material layer and the average thickness of the left material layer detected, H LSet the upper limit of the difference between the thickness of the left material layer and the average thickness of the left material layer. When the thickness of the left material layer meets the following conditions H_L_sp-H_L_AVE(k)<L L , H_L_sp-H_L_AVE(k)>H L , the system performs calculations.

[0065] (2) Calculation of the difference in thickness of the intermediate material layer (i.e., the change in thickness)

[0066] like Figure 3 The figure shows the control block diagram of the middle side material layer of the feeding system in asynchronous mode, and obtains the current middle material layer thickness difference Y_M(k).

[0067] H_M_AVE(k)=[H_M_L(k)+H_M_R(k)] / 2 (3)

[0068] When H_M_sp-H_M_AVE(k)<L M , H_M_sp-H_M_AVE(k)>H M Normal calculation is performed to obtain the thickness difference of the current middle material layer. The calculation formula is as follows:

[0069]

[0070] Among them, H_M_L(k) is the material layer thickness detection value of the middle left material level at time k, H_M_R(k) is the material layer thickness detection value of the middle right material level at time k, H_M_AVE(k) is the average material layer thickness detection value of the middle material level at time k, H_M_sp is the middle material layer thickness setting value, H_M_AVE(k-1) is the average material layer thickness of the middle material level at time k-1, k 3 , k 4 are the scale factors, a 3 、b 3 、a 4 、b 4 is the adjustment factor, L M The lower limit of the difference between the set thickness of the middle material layer and the average thickness of the middle material layer detected, H M Set the upper limit of the difference between the thickness of the middle material layer and the average thickness of the middle material layer detected.

[0071] (3) Calculation of thickness difference of right material layer (i.e. thickness change)

[0072] like Figure 4 As shown, the control block diagram of the right material layer of the feeding system in asynchronous mode is used to obtain the current thickness difference Y_R(k) of the right material layer.

[0073] H_R_AVE(k)=[H_R(k)+H_R1(k)] / 2 (5)

[0074] When H_R_sp-H_R_AVE(k)<L R , H_R_sp-H_R_AVE(k)>H R Perform normal calculation to obtain the thickness difference of the current right material layer. The calculation formula is as follows:

[0075]

[0076] Among them, H_R(k) is the material layer thickness detection value of the right material level, H_R1(k) is the material layer thickness detection value of the first right material level, H_R_AVE(k) is the average material layer thickness detection value of the right material level at time k, H_R_sp is the right material layer thickness setting value, H_R_AVE(k-1) is the average material layer thickness of the right material layer detection device at time k-1, k 5 , k 6 are the scale factors, a 5 , b 5 、a 6 , b 6 is the adjustment factor, L R The lower limit of the difference between the set thickness of the right material layer and the average thickness of the right material layer detected, H R Set the upper limit of the difference between the thickness of the right material layer and the average material layer thickness detected on the right side. When the thickness of the left material layer meets the following conditions H_R_sp-H_R_AVE(k)<L R , H_R_sp-H_R_AVE(k)>H R , the system performs calculations.

[0077] Step 3, dynamically adjust the feeding grate speed;

[0078] Based on the actual measured value of the material layer thickness, the present invention can intelligently adjust the forward speed of each group of feeding grates. The faster the forward speed of the feeding grates, the more garbage is pushed into the incinerator per unit time. When the material layer thickness on one side increases to more than the set thickness, the speed of the feeding grate of the corresponding group will slow down, reducing the thickness of the garbage on this side and reducing the amount of garbage on this side; conversely, the speed of the feeding grate of the corresponding group will speed up, increasing the amount of garbage on this side, thereby ensuring the uniform distribution of the overall material layer of the incinerator and meeting the local thickness requirements.

[0079] Through refined control methods, the problem of uneven burning caused by uneven material layer distribution in large incinerators was solved from the source, thus improving production efficiency.

[0080] Taking a large-scale garbage incineration grate of more than 750 tons as an example, in the case of low garbage calorific value and large mechanical load, in order to prevent serious biased burning, the present invention adopts an asynchronous operation mode of the feeding grate, and divides the 6 feeding grates into 3 groups: left, middle, and right. Each group is independently controlled and operated, and is not affected by the feeding grates of other groups. The minimum speed of the preset feeding trolley is 0.2mm / s, the maximum speed is 2mm / s, the difference between the left and right material layers is 0.07m, the difference between the middle material layers is 0.06m, the cycle is 0.8s, and the preset speed adjustment step is 0.005mm / s.

[0081] In a waste incinerator, the distribution of the material layer has an important impact on the combustion efficiency. Appropriate material layer thickness can ensure that the waste is fully burned in the furnace. The material layer distribution of the feeding part is limited by the distribution of waste in the feeding chute, feeding, etc., and it is easy to have uneven distribution of waste layers on the left, middle, and right sides, which leads to uneven drying, preheating, combustion, and burning. The entire combustion process is also limited by the different combustion rates at different positions in the incinerator. Therefore, in order to correct the distribution of the material layer of waste entering the incinerator and improve the overall combustion rate of the waste incinerator, the feeding system needs to be controlled and corrected.

[0082] During the combustion process, the garbage on both sides is close to the furnace, the gap between the grates is slightly larger than that in the middle, the primary air volume is large, the combustion rate is fast, and the material layers on both sides are relatively thin after reaching the combustion section. Therefore, the material layers on both sides should be positively compensated in the feeding area so that there is still garbage participating in the combustion after reaching the combustion section to prevent excessive primary air. The gap between the grates in the middle area is small, the primary air volume is small, and the garbage combustion rate is slightly slow, so the thickness of the material layer in the middle part is slightly thinned.

[0083] Under normal circumstances, the reference material layer thickness of the drying section is set to 0.9 meters, the thickness correction value of the left material layer is set to 0.0 meters, the thickness correction value of the middle material layer is set to -0.1 meters, and the thickness correction value of the right material layer is set to 0.0 meters, that is, the thickness of the left material layer is 0.9 meters, the thickness of the middle material layer is 0.8 meters, and the thickness of the right material layer is 0.9 meters. When partial burning occurs, make adjustments according to the following rules:

[0084] G1) When the thickness difference of the material layer in the left group of drying areas is greater than 0.07m, the speed is reduced by 0.005 (mm / s). If the difference is still greater than 0.07m after 0.5 seconds, the speed continues to be reduced by 0.005 (mm / s). The speed of the left feeding grate is gradually reduced. When the speed of the feeding trolley drops to the minimum value of 0.2 (mm / s) or the minimum value set manually, the speed will no longer continue to decrease.

[0085] G2) When the thickness difference of the material layer in the left group of drying areas is less than -0.07m, the speed increases by 0.005 (mm / s). If the difference is still less than 0.07m after 0.5 seconds, the speed continues to increase by 0.005 (mm / s). The speed of the left feeding grate increases gradually and iteratively. When the speed of the feeding trolley increases to the maximum value of 2.0 (mm / s) or the manually set maximum value, the speed will no longer increase.

[0086] G3) When the thickness difference of the material layer in the middle group of drying zones is greater than 0.06m, the speed is reduced by 0.005 (mm / s). If the difference is still greater than 0.06m after 0.5 seconds, the speed continues to be reduced by 0.005 (mm / s). The speed of the intermediate feeding grate is gradually reduced. When the speed of the feeding trolley drops to the minimum value of 0.2 (mm / s) or the manually set minimum value, the speed will no longer continue to decrease.

[0087] G4) When the thickness difference of the material layer in the middle group of drying zones is less than -0.06m, the speed increases by 0.005 (mm / s). If the difference is still less than 0.06m after 0.5 seconds, the speed continues to increase by 0.005 (mm / s). The speed of the intermediate feeding grate increases gradually and iteratively. When the speed of the feeding trolley increases to the maximum value of 2.0 (mm / s) or the manually set maximum value, the speed will no longer increase.

[0088] G5) When the thickness difference of the material layer in the right group of drying areas is greater than 0.07m, the speed is reduced by 0.005 (mm / s). If the difference is still greater than 0.07m after 0.5 seconds, the speed continues to be reduced by 0.005 (mm / s). The speed of the feeding grate on the right side is gradually reduced. When the speed of the feeding trolley drops to the minimum value of 0.2 (mm / s) or the manually set minimum value, the speed will no longer continue to decrease.

[0089] G6) When the thickness difference of the material layer in the right group of drying areas is less than -0.07m, the speed increases by 0.005 (mm / s). If the difference is still less than 0.07m after 0.5 seconds, the speed continues to increase by 0.005 (mm / s). The speed of the feeding grate on the right side increases gradually and iteratively. When the speed of the feeding trolley increases to the maximum value of 2.0 (mm / s), the manually set maximum value, the speed no longer increases.

[0090] When left-biased burning occurs, the reference material layer thickness of the drying section is set to 0.9 m unchanged, the left material layer thickness correction value is set to -0.05 m, the middle material layer thickness correction value is set to -0.1 m, and the right material layer thickness correction value is set to +0.2 m, that is, the material layer thickness is 0.85 m, the middle material layer thickness is 0.8 m, and the right material layer thickness is 1.1 m; and adjustments are made according to the rules of G1) to G6).

[0091] When right-biased burning occurs, the reference material layer thickness of the drying section is set to 0.9 meters unchanged, the thickness correction value of the left material layer is set to 0.2 meters, the thickness correction value of the middle material layer is set to -0.1 meters, and the thickness correction value of the right material layer is set to -0.05 meters, that is, the thickness of the left material layer is 1.1 meters, the thickness of the middle material layer is 0.8 meters, and the thickness of the right material layer is 0.85 meters; and adjustments are made according to the rules of G1) to G6).

[0092] In summary, the present invention significantly improves the phenomenon of partial burning in waste incineration, and significantly reduces the previous frequent partial burning 2 to 3 times a day to once a day, and can even be extended to once every three or four days. When partial burning occurs, it is only necessary to fine-tune the thickness of the material layer on the partial burning side to achieve rapid correction within about 1 hour. The present invention not only ensures the stable operation of the waste incinerator, effectively reduces the risk of excessive pollutants such as nitrogen oxides and sulfides caused by partial burning, but also significantly improves the combustion efficiency and further reduces the overall operating cost.

Claims

1. A method for asynchronous automatic adjustment and control of biased burning of a garbage incinerator, characterized in that: The steps include: S1, divide the feeding grate into three groups: left material layer, middle material layer and right material layer. Based on the reference material layer thickness of the drying section, set the thickness of the left material layer, the thickness of the middle material layer and the thickness of the right material layer of the drying section separately; S2, using a radar level meter to obtain the material layer thickness of the incineration grate unit corresponding to each feeding grate in real time, and compare it with the material layer thickness of the incineration grate unit at the previous moment, and accurately calculate the change value of each material layer thickness; S3, based on the actual measured value of the material layer thickness, adjust the forward speed of each group of feeding grates: when the material layer thickness on one side increases to more than the set thickness, the feeding grate speed of the corresponding group will slow down, reducing the garbage thickness on this side and reducing the amount of garbage on this side; when the material layer thickness on one side increases to less than the set thickness, the feeding grate speed of the corresponding group will accelerate, increasing the garbage thickness on this side and increasing the amount of garbage on this side.

2. According to claim 1, the method for asynchronous automatic adjustment and control of biased burning of a garbage incinerator is characterized in that: The setting values ​​of the material layer thickness on the left side, the material layer thickness in the middle, and the material layer thickness on the right side of the drying section are as follows: The thickness setting value of the left material layer is: H_L_sp=H_sp+H_sp_L_cal The setting value of the middle material layer thickness is: H_M_sp=H_sp+H_sp_M_cal The thickness setting value of the right material layer is: H_R_sp=H_sp+H_sp_R_cal Among them, H_sp is the reference material layer thickness in the drying section, H_sp_L_cal is the correction value for the thickness of the left material layer, H_sp_M_cal is the correction value for the thickness of the middle material layer, and H_sp_R_cal is the correction value for the thickness of the right material layer.

3. According to claim 1, the method for asynchronous automatic adjustment and control of biased burning of a garbage incinerator is characterized in that: The calculation of the change in thickness of each material layer is as follows: 1) Let L L Set the lower limit of the difference between the thickness of the left material layer and the average thickness of the left material layer detected, H L Set the upper limit of the difference between the thickness of the left material layer and the average thickness of the left material layer. When the thickness of the left material layer meets the following conditions H_L_sp-H_L_AVE(k)<L L 、H_L_sp-H_L_AVE(k)>H L When , the expression of the thickness change value Y_L(k) of the left material layer is as follows: Y_L(k)=k1×[a1+b1*H_L_sp-H_L_AVE(k)] +k2×[a2+b2*[H_L_AVE(k)-H_L_AVE(k-1)]] H_L_AVE(k)=[H_L(k)+H_L1(k)] / 2 Among them, H_L(k) is the material layer thickness detection value of the left material level, H_L1(k) is the material layer thickness detection value of the first left material level, H_L_AVE(k) is the average material layer thickness detection value of the left material layer at time k, H_L_sp is the left material layer thickness setting value, H_L_AVE(k-1) is the average material layer thickness detection value of the left material layer at time k-1, k1 and k2 are proportional factors respectively, and a1, b1, a2, and b2 are adjustment factors respectively; 2) Let L M The lower limit of the difference between the set thickness of the middle material layer and the average thickness of the middle material layer detected, H M Set the upper limit of the difference between the thickness of the middle material layer and the average thickness of the middle material layer. When the thickness of the middle material layer meets the following conditions H_M_sp-H_M_AVE(k)<L M 、H_M_sp-H_M_AVE(k)>H M When , the expression of the change value of the thickness of the middle material layer Y_M(k) is as follows: Y_M(k)=k3×[a3+b3*H_M_sp-H_M_AVE(k)] +k4×[a4+b4*[H_M_AVE(k)-H_M_AVE(k-1)]] H_M_AVE(k)=[H_M_L(k)+H_M_R(k)] / 2 Among them, H_M_L(k) is the material layer thickness detection value of the middle left material level at time k, H_M_R(k) is the material layer thickness detection value of the middle right material level at time k, H_M_AVE(k) is the average material layer thickness detection value of the middle material level at time k, H_M_sp is the middle material layer thickness setting value, H_M_AVE(k-1) is the average material layer thickness of the middle material level at time k-1, k3 and k4 are proportional factors respectively, and a3, b3, a4, and b4 are adjustment factors; 3) Let L R The lower limit of the difference between the set thickness of the right material layer and the average thickness of the right material layer detected, H R Set the upper limit of the difference between the thickness of the right material layer and the average material layer thickness detected on the right side. When the thickness of the left material layer meets the following conditions H_R_sp-H_R_AVE(k)<L R 、H_R_sp-H_R_AVE(k)>H R When , the expression of the thickness change value Y_R(k) of the right material layer is as follows: Y_R(k)=k5×[a5+b5*H_R_sp-H_R_AVE(k)] +k6×[a6+b6*[H_R_AVE(k)-H_R_AVE(k-1)]] H_R_AVE(k)=[H_R(k)+H_R1(k)] / 2 Among them, H_R(k) is the material layer thickness detection value of the right material level, H_R1(k) is the material layer thickness detection value of the first right material level, H_R_AVE(k) is the average material layer thickness detection value of the right material level at time k, H_R_sp is the right material layer thickness setting value, H_R_AVE(k-1) is the average material layer thickness of the right material layer detection device at time k-1, k5 and k6 are proportional factors respectively, and a5, b5, a6, and b6 are adjustment factors.

4. According to claim 1, the method for asynchronous automatic adjustment and control of biased burning of a garbage incinerator is characterized in that: Under normal circumstances, the reference material layer thickness of the drying section is set to 0.9 meters, the thickness correction value of the left material layer is set to 0.0 meters, the thickness correction value of the middle material layer is set to -0.1 meters, and the thickness correction value of the right material layer is set to 0.0 meters; When left-biased burning occurs, the reference material layer thickness of the drying section is set to 0.9 m, the thickness correction value of the left material layer is set to -0.05 m, the thickness correction value of the middle material layer is set to -0.1 m, and the thickness correction value of the right material layer is set to +0.2 m; When right-biased burning occurs, the reference material layer thickness of the drying section is set to 0.9 m, the left material layer thickness correction value is set to 0.2 m, the middle material layer thickness correction value is set to -0.1 m, and the right material layer thickness correction value is set to -0.05 m.

5. According to claim 4, the method for asynchronous automatic adjustment and control of biased burning of a garbage incinerator is characterized in that: When the burn is off, make adjustments according to the following rules: When the thickness difference of the material layer in the left drying area is greater than 0.07m, the speed is reduced by 0.005mm / s. If the difference is still greater than 0.07m after 0.5 seconds, the speed is further reduced by 0.005mm / s. The speed of the left feeding grate is gradually reduced. When the speed of the feeding trolley drops to 0.2mm / s, the speed will no longer be reduced. When the thickness difference of the material layer in the left drying area is less than -0.07m, the speed increases by 0.005mm / s. If the difference is still less than 0.07m after 0.5 seconds, the speed continues to increase by 0.005mm / s. The speed of the left feeding grate increases gradually and iteratively. When the speed of the feeding trolley increases to 2.0mm / s, the speed stops increasing. When the thickness difference of the drying zone material layer in the middle group is greater than 0.06m, the speed is reduced by 0.005mm / s. If the difference is still greater than 0.06m after 0.5 seconds, the speed is further reduced by 0.005mm / s. The speed of the middle feeding grate is gradually reduced. When the speed of the feeding trolley drops to 0.2mm / s, the speed will no longer be reduced. When the thickness difference of the drying zone material layer in the middle group is less than -0.06m, the speed increases by 0.005mm / s. If the difference is still less than 0.06m after 0.5 seconds, the speed continues to increase by 0.005mm / s. The speed of the middle feeding grate increases gradually and iteratively. When the speed of the feeding trolley increases to 2.0mm / s, the speed stops increasing. When the thickness difference of the material layer in the right group of drying areas is greater than 0.07m, the speed is reduced by 0.005mm / s. If the difference is still greater than 0.07m after 0.5 seconds, the speed is further reduced by 0.005mm / s. The speed of the feeding grate on the right side is gradually reduced. When the speed of the feeding trolley drops to 0.2mm / s, the speed will no longer continue to decrease. When the thickness difference of the material layer in a group of drying areas on the right is less than -0.07m, the speed increases by 0.005mm / s. If the difference is still less than 0.07m after 0.5 seconds, the speed continues to increase by 0.005mm / s. The speed of the feeding grate on the right side increases gradually and iteratively. When the speed of the feeding trolley increases to 2.0mm / s, the speed no longer increases.

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