A method for controlling operation of a furnace tank

Abstract

The present invention discloses an operation control method for a furnace tank body, and belongs to the field of stress monitoring technology. The present invention sets a plurality of stress detection devices along the circumferential direction of the bottom plate of the furnace tank body, and the stress detection devices detect the upward stress of the bottom plate. The sum of the data detected by the plurality of stress detection devices is the stress simulation data of the furnace tank body. The PLC control system collects the data of the stress detection devices, and sends a control signal according to the data to control the operation of the furnace tank body. The present invention is aimed at the high pressure, fast speed, and rapid flow working status of in-line furnaces, liquid storage tanks, gas storage tanks and other devices in modern large-scale industrial production, and takes into account that the shells of rigid equipment such as in-line furnaces, liquid storage tanks, gas storage tanks, etc. are subjected to stresses generated by various changes in the equipment, which act on the bottom plate from top to bottom, so as to monitor the stress changes of the bottom plate of the equipment in real time, and combine with the established equipment stress model to grasp the equipment operation status in real time.

Description

Technical Field

[0001] The invention relates to the technical field of furnace tank stress monitoring, and more specifically to an operation control method for a furnace tank. Background Art

[0002] As modern large-scale industrial production of in-line furnaces, liquid storage tanks, gas storage tanks and other equipment becomes larger and larger, in order to improve efficiency and strengthen the operating parameters, high pressure, fast speed, rapid flow working parameters continue to improve. When this type of equipment is in operation, the load, temperature, pressure and other operating parameters fluctuate, which will cause the stress of various parts of the equipment to fluctuate. The stress fluctuation is the main cause of fatigue failure of equipment components, and it is also the key to causing sudden damage and explosion of equipment. The existing technology usually passively increases the safety factor, increases construction investment, shortens the maintenance cycle, and frequently reinforces and replaces. It is unable to fundamentally solve this type of problem, and equipment failures and serious accidents occur from time to time.

[0003] With the continuous development of smart manufacturing, precise control of operating parameters has become possible. Real-time detection of stress changes during equipment operation can meet the needs of ultra-large-scale stress fluctuations, provide real-time and accurate stress big data for intelligent control, and accurately adjust operating parameters and safely control impact stress peaks, which can reduce equipment fatigue load and extend equipment life. However, at present, real-time monitoring of stress in equipment such as furnaces, liquid storage tanks, and gas storage tanks for large-scale industrial production is still a blank in the industry, so a stress monitoring solution is urgently needed.

[0004] After searching, Chinese patent application number CN202110490654 discloses a tank bottom plate defect detection device and method based on ultrasonic detection; the application includes a fixed frame, a detector is provided on the fixed frame, a detection probe is provided on the detector, an arc plate matching the tank is provided on the fixed frame, and a plurality of rollers are rotatably connected at both ends of the arc plate, a through hole is opened on the fixed frame, a fixed rope is passed through the through hole, a fixed sheet is provided at one end of the fixed rope, and an adjustment block is provided at the other end of the fixed rope, and the fixed sheet and the adjustment block are detachably connected through a connecting assembly, and an adjustment assembly for retracting and releasing the fixed rope is also provided on the adjustment block, and the fixed rope is tautly wound around the outer edge of the tank, and a plurality of rollers are pressed between the fixed rope and the tank, and the detection probe is tilted toward the tank bottom plate. The application can detect defects on the tank bottom plate through the detection probe, but it is impossible to monitor the working stress of the bottom plate in real time and calibrate it online, accurately control and adjust the stress under stable working state, and it is difficult to meet the large-scale stress detection.

[0005] Chinese patent number ZL2015107624763 discloses a device for detecting stress changes of blast furnace bottom sealing plate; the application includes a furnace bottom sealing plate, a castable and a pressure sensing mechanism, the furnace bottom sealing plate is an upturned blast furnace bottom sealing plate, and the castable is poured into the gap formed between the upturned furnace bottom sealing plate and the blast furnace heat-resistant base; the pressure sensing mechanism includes a top plate, a pressure sensor, a pre-embedded anchor bolt, a pressure plate, a pad A and a nut; the bottom end of the pre-embedded anchor bolt is inserted into the outer side of the blast furnace shell and the foundation drill hole reserved on the blast furnace foundation, and the upper part passes through the pressure plate and is slidably connected to the pressure plate; one end of the bottom end face of the pressure plate is pressed on the pad A, and the other end is pressed on the top plate, the pressure sensor and the upturned end of the furnace bottom sealing plate in turn, and its upper end face is screwed downward through the top thread of the nut and the pre-embedded anchor bolt. The application realizes the purpose of using the pressure sensing mechanism to continuously detect the pressure changes of the blast furnace bottom sealing plate online, and provides multi-measurement point data to facilitate the analysis of the pressure changes of the furnace bottom sealing plate. However, the application did not accurately describe the detection principle of the detection device, the calculation formula and calibration method of the collected detection data, and the adjustment measures to cope with changes in on-site position, let alone any countermeasures for intelligent control of stress fluctuations. Summary of the invention

[0006] 1. Technical problem to be solved by the invention

[0007] Aiming at the working status of high pressure, fast speed and rapid flow of in-line furnaces, liquid storage tanks, gas storage tanks and other devices in modern large-scale chemical industrial production, the present invention provides an operation control method for a furnace tank body; the present invention monitors the stress changes of the bottom plates of in-line furnaces, liquid storage tanks, gas storage tanks and other equipment in large-scale chemical industrial production in real time, predicts the trend of stress increase, accurately controls the operating parameters of the equipment, effectively controls the stress impact peak value, and ensures the safe and stable operation of the equipment.

[0008] 2. Technical solution

[0009] In order to achieve the above object, the technical solution provided by the present invention is:

[0010] The present invention provides an operation control method for a furnace tank body. A plurality of stress detection devices are arranged along the circumferential direction of the bottom plate of the furnace tank body. The stress detection devices detect the upward stress of the bottom plate. The sum of the data detected by the plurality of stress detection devices is the stress simulation data of the furnace tank body. The PLC control system collects the data of the stress detection devices and sends a control signal according to the data to control the operation of the furnace tank body.

[0011] Furthermore, the stress detection devices are arranged in (4-8)×N groups at equal intervals along the circumferential direction of the bottom plate of the kiln tank body, where N=1, 2, 3...

[0012] Furthermore, the stress detection device includes a stress sensor, a fixed pressure beam, an adjustable fixing bolt, an adjustable fixing nut, a pressure block and a support block. The stress sensor is arranged on the bottom plate, the support block is arranged on the foundation beside the furnace tank body, the fixed pressure beam is arranged on the stress sensor and the support block, a hole is opened on the fixed pressure beam, one end of the adjustable fixing bolt is fixed in the foundation and passes through the fixed pressure beam; the adjustable fixing nut adjusts the position of the fixed pressure beam through the pressure block; the ends of the pressure block and the support block that contact the fixed pressure beam are both provided with cutting edges.

[0013] Furthermore, the actual stress simulation data of the stress detection device is F 实 =L1÷L2×F 表数值 , L1 is the distance between the center axis of the stress sensor and the center axis of the adjustment fixing bolt, L2 is the distance between the center axis of the adjustment fixing bolt and the center axis of the support block, and the actual stress simulation data of the furnace tank is F 总 =(F 实1 +F 实2 +……F 实n ).

[0014] Furthermore, the actual stress simulation data F of the furnace tank body 总 The calibration process is:

[0015] According to the calculated data of 1.3 times the stress of the kiln tank, adjust the initial value F displayed by the system when the kiln tank is running stably 总1 ; When the furnace tank is shut down for maintenance, the system displays F 总2 ; Actual stress simulation data of the furnace tank in stable operation F 标 =F 总- 1F 总2 ; When the furnace tank body is running stably again, F 标 The value is the system reference value. Re-adjust the fixing nut to complete the calibration of the stress simulation value.

[0016] Furthermore, the stress of the kiln tank is linearly controlled, including:

[0017] After the stress monitoring system is calibrated, the working stress bottom value F is collected. 底 , and peak working stress F 峰 ;

[0018] Set the threshold F 阈 =(F 峰 -F 底 ) / T÷T1, T is the equipment action time, T1 is the stress collection cycle;

[0019] Stress rise value per T1 second △F=F 新 -F前 ;

[0020] When △F≤F 阈 , the working equipment of the furnace tank continues to move;

[0021] When △F>F 阈 , the furnace tank working equipment stops and waits for the next cycle; when △F≤F 阈 , the working equipment of the furnace tank resumed operation.

[0022] Furthermore, the control process of stress peak safety protection is:

[0023] When the working state of the furnace tank changes, set the stress threshold F 阈 =αF 标 , α>1;

[0024] When the working state of the furnace tank changes and F 阈 ≥(1.5~1.9)F 标 , issue control instructions to control the valve operation of the furnace tank to pause or slow down;

[0025] When F 阈 ≤(1.1~1.4)F 标 , issue control instructions to control the valve operation of the furnace tank to resume or run normally;

[0026] When F 阈 ≥(1.5~1.9)F for 3 consecutive times 标 , issue control instructions, close the valve urgently and stop operation.

[0027] Furthermore, the stress sensor adopts a pressure type weighing sensor.

[0028] Furthermore, the pressure weighing sensors arranged along the circumferential direction of the bottom plate of the same furnace tank body are of the same model.

[0029] Furthermore, the fixed compression beam is a plane structure or a Z-shaped structure; when the bottom plate of the kiln tank body is higher or lower than the foundation, the Z-shaped structure is used to fix the compression beam.

[0030] 3. Beneficial effects

[0031] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects:

[0032] (1) The present invention is a furnace tank bottom plate stress real-time monitoring system, aimed at the high pressure, fast speed, and rapid flow working status of in-line furnaces, liquid storage tanks, gas storage tanks and other devices in modern large-scale industrial production. Considering that the shells of in-line furnaces, liquid storage tanks, gas storage tanks and other rigid equipment are subjected to stress generated by various changes in the equipment, which acts on the bottom plate from top to bottom, the stress change of the bottom plate of the equipment is monitored in real time, and the equipment operation status is grasped in real time in combination with the established equipment stress model;

[0033] (2) A real-time monitoring system for the stress of the bottom plate of a furnace tank of the present invention is provided with a stress detection device. Through a simple pressure beam structure, the system can detect the large-scale stress changes of the bottom plates of in-line furnaces, liquid storage tanks, gas storage tanks and other equipment and containers, thereby filling the gap in the monitoring of stress generated inside large-scale production equipment and providing a basis for intelligent control to collect real-time and accurate large-scale stress data;

[0034] (3) The operation control method of a furnace tank body of the present invention, combined with the process characteristics of the equipment operation, predicts the trend of stress increase, accurately controls the equipment operation parameters, effectively controls the stress impact peak, ensures the safe and stable operation of the equipment, reduces fatigue load, extends the service life, and improves the service life, thereby achieving inherent safety of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the arrangement of the stress detection device in the present invention;

[0036] Figure 2 It is a schematic diagram of the layout of the stress detection device for the bottom plate of the furnace tank in the present invention;

[0037] Figure 3 It is a schematic diagram of the real-time stress model of the bottom plate of the furnace tank in the present invention;

[0038] Figure 4 Schematic diagrams of three implementation schemes of the furnace tank stress detection device of the present invention;

[0039] Figure 5 It is a schematic diagram of the real-time monitoring system for the stress of the furnace tank in the present invention;

[0040] Figure 6 It is the mathematical model diagram of safety control;

[0041] Figure 7 This is the stress trend diagram of the blast furnace bottom warping;

[0042] Figure 8 This is a graph showing the stress trend changes of the furnace bottom in the four iron mouth areas of the blast furnace.

[0043] Explanation of the symbols in the schematic diagram:

[0044] 1. Furnace tank body; 2. Bottom plate; 3. Stress detection device; 31. Stress sensor; 32. Fixed clamping beam; 33. Adjusting fixing bolts; 34. Adjusting fixing nuts; 35. Clamping block; 36. Support block; 37. Foundation. DETAILED DESCRIPTION

[0045] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0046] Example 1

[0047] Combination Figure 2 and Figure 5 The present embodiment is a real-time monitoring system for the stress of the bottom plate of a furnace tank body, comprising a stress detection device 3 and a PLC control system. The stress detection devices 3 are arranged along the circumferential direction of the bottom plate 2 of the furnace tank body 1, 16 in number, and are divided into 4 groups. The stress detection devices 3 detect the upward stress of the bottom plate 2. The stress detection devices 3 are connected to the PLC control system and transmit the detection data to the PLC control system. The PLC control system is provided with a stress detection module, a security module, a calibration module, and a linear control module. The PLC establishes a linear control model and controls the operation of the furnace tank body 1 through the linear control module.

[0048] Combination Figure 1 The stress detection device 3 includes a stress sensor 31, a fixed pressing beam 32, an adjustable fixing bolt 33, an adjustable fixing nut 34, a pressing block 35 and a supporting block 36. The stress sensor 31 is arranged on the bottom plate 2, and the supporting block 36 is arranged on the foundation 37 beside the furnace tank 1. The fixed pressing beam 32 is directly pressed on the stress sensor 31 and the supporting block 36. The fixed pressing beam 32 is a plane structure, and the fixed pressing beam 32 is kept horizontal by the supporting block 36. The fixed pressing beam 32 is provided with a threaded hole, and one end of the adjustable fixing bolt 33 is fixed in the foundation 37 and passes through the fixed pressing beam 32; the pressing block 35 is also provided with a threaded hole correspondingly, and is sleeved on the adjustable fixing bolt 33 at the same time, and the adjustable fixing nut 34 adjusts the position of the fixed pressing beam 32 through the pressing block 35. The fixed pressing beam 32 relies on the adjustable fixing bolt 33 to keep the installation position uniformly distributed, and relies on the adjustable fixing nut 34 to adjust and calibrate the stress. The pressing block 35 is the data calculation basis of the stress simulation quantity.

[0049] It is worth noting that the ends of the clamping block 35 and the support block 36 that contact the fixed clamping beam 32 are both provided with cutting edges, and this design is the key to achieving accurate measurement of the upward stress of the bottom plate 2.

[0050] The stress sensor 31 is a pressure type weighing sensor, and the pressure type weighing sensor has a measuring range of 1×10 3 ~5×106 N is reasonably selected according to the fluctuation range calculated by design. The pressure weighing sensors arranged along the circumference of the bottom plate 2 of the same furnace tank 1 are of the same model. The sum of several sensors is the stress simulation data of the furnace tank 1.

[0051] The furnace tank body 1 described in this embodiment can be an in-line furnace, liquid storage tank, gas storage tank and other devices in actual applications, and the device must have a bottom sealing plate. In view of the high pressure, fast speed and rapid flow working status of such modern large-scale industrial production devices, and considering that the shell of such rigid equipment is subjected to the stress generated by various changes in the equipment, which acts on the bottom plate from top to bottom, this embodiment monitors the stress changes of the bottom plate of the equipment in real time, and combines the established equipment stress model to grasp the equipment operation status in real time. In addition, this embodiment installs a pressure stress sensor through a simple pressure beam structure to monitor the warping stress of the bottom plate in real time. It has a simple structure, low implementation cost and high application prospects.

[0052] Example 2

[0053] Combination Figure 4 The present embodiment is a real-time monitoring system for the stress of the bottom plate of a furnace tank body, which is basically the same as that of the first embodiment, except that: according to the on-site conditions, when the bottom plate 2 of the furnace tank body 1 is higher or lower than the foundation 37, the fixed pressing beam 32 can be designed as a Z-shaped structure, and the fixed pressing beam 32 of the Z-shaped structure is used to compress the stress sensor 31 to realize the monitoring of the warping stress of the bottom plate.

[0054] Example 3

[0055] Combination Figure 3 and Figure 6 In the operation control method of a furnace tank body of the present embodiment, 16 stress detection devices 3 are evenly installed along the circumferential direction of the bottom plate 2 of the furnace tank body 1, and are divided into 4 groups. The stress detection devices 3 detect the upward stress of the bottom plate 2, and the sum of the data detected by the 16 stress detection devices 3 is the stress simulation data of the furnace tank body 1. The PLC control system collects the data of the stress detection devices 3, timely and accurately grasps the equipment operation status, combines calculation to establish the equipment stress model, and sends a control signal according to the processing result to control the operation of the furnace tank body 1.

[0056] The actual stress simulation data of the stress detection device 3 is F 实 =L1÷L2×F 表数值 , L1 is the distance between the center axis of the stress sensor 31 and the center axis of the adjusting fixing bolt 33, L2 is the distance between the center axis of the adjusting fixing bolt 33 and the center axis of the supporting block 36, and the actual stress simulation data of the furnace tank 1 is F 总 =(F 实1 +F 实2 +……F实n ).

[0057] The data initially displayed by each stress sensor 31 is adjusted to be the same as the data value during each calibration. The sum of the data of several sensors is the stress simulation data of the furnace tank body 1.

[0058] In practical applications, a real-time stress model of the bottom plate of the kiln tank 1 is established. First, the sensor adjustment fixing bolt 33 is adjusted through the on-site instrument display to ensure that the data of each sensor is the same. Then the sensor adjustment fixing bolt 33 is adjusted to complete the initial calculation model value setting. Then, the model calibration value confirmation is completed by adjusting the sensor adjustment fixing bolt 33. During the adjustment process, it is ensured that each stress sensor 31 is evenly stressed, and the synergistic effect of multiple stress sensors is further exerted.

[0059] The actual stress simulation data F of the furnace tank 1 总 The calibration process is:

[0060] According to the calculated data of 1.3 times the stress of furnace tank 1, adjust the initial value F displayed by the system when the furnace tank 1 is running stably 总1 ; When the furnace tank 1 is shut down for maintenance, the system displays F 总2 ; Actual stress simulation data F of the furnace tank 1 in stable operation 标 =F 总1 -F 总2 ; When the furnace tank 1 is running stably again, F 标 The value is the system reference value. Re-adjust the fixing nut 34 to complete the calibration of the stress simulation value.

[0061] This embodiment performs linear control on the stress of the furnace tank body 1, specifically including:

[0062] After the stress monitoring system is calibrated, the working stress bottom value F is collected. 底 , and peak working stress F 峰 ; If the stress acquisition cycle is 5 seconds, set the threshold F 阈 =(F 峰 -F 底 ) / T÷5, T is the equipment action time. The stress rise value every 5 seconds △F=F 新 -F 前 ; When △F≤F 阈 , the furnace tank 1 continues to move; when △F>F 阈 , the furnace tank 1 stops moving and waits for the next cycle; when △F≤F 阈 , the furnace tank body 1 resumes its action. When the furnace tank body 1 is in operation, the stress rises linearly and smoothly to the peak value, reducing the impact load and fatigue damage.

[0063] The control process of the stress peak safety protection in this embodiment is as follows:

[0064] When the operating state of the furnace tank 1 changes, the stress threshold F is set. 阈 =αF 标 , α>1; when the operating state of the furnace tank 1 changes and F 阈 ≥(1.5~1.9)F 标 , issue a control command to control the valve operation of the furnace tank 1 to pause or slow down; when F 阈 ≤(1.1~1.4)F 标 , issue a control command to control the valve operation of the furnace tank body 1 to resume or run normally;

[0065] When F 阈 ≥(1.5~1.9)F for 3 consecutive times 标 , issue control instructions, close valves urgently and stop operations. In this way, real-time stress data monitoring can be achieved, and equipment operation valves and other operations can be accurately controlled to ensure that the working stress peak is safe and controllable, and to prevent accidents and faults.

[0066] Example 4

[0067] The bottom plate stress real-time monitoring scheme was applied to the practice of large blast furnace bottom warping stress monitoring. Sixteen bottom plate warping stress detection devices were symmetrically installed on the outer edge of the blast furnace bottom plate with a diameter of ￠18900㎜. Combined with the established stress real-time detection model, a real-time detection model of iron mouth stress was established for four iron mouth areas. After the commissioning and calibration, the stress change trend of the furnace top has been monitored for five years, and the blast furnace production process parameters have been adjusted in time to keep the total stress peak value controlled at 275×10 6 N(Design safety threshold F 阈 =300×10 6 N) and achieve the goal of longevity of the blast furnace.

[0068] refer to Figure 7 , we can combine the changing trend of the furnace bottom stress curve throughout the year to timely and accurately adjust the furnace top stress, air supply pressure, and the balance of harmful elements in the raw materials.

[0069] Combination Figure 8 The four iron mouths of the blast furnace are alternately resting and working to tap iron, which leads to different upwarping stresses of the furnace bottom in the four iron mouth areas. Combined with the production process requirements, the blast furnace tapping work system can be adjusted in time according to the stress differences to keep the upwarping stress difference of the furnace bottom in the four iron mouth areas within a safe range.

[0070] When the blast furnace is shut down for maintenance, the bottom upwarp stress changes significantly with the change in production air volume, which also reflects the change in the molten iron level in the furnace, providing data information support for the appropriate adjustment of production process parameters.

[0071] Example 5

[0072] The real-time monitoring scheme of the bottom plate stress is applied to the hot blast furnace scene. The hot blast pipe system of the blast furnace is connected to four single-row hot blast furnaces to alternately deliver the hot blast of uniform and stable 1230℃~1250℃ and 450Kpa pressure into the blast furnace production work. When each hot blast furnace is transferring air from combustion to transfer, the pressure equalizing valve is opened to increase the pressure in the furnace to 450Kpa. The bottom plate stress is detected within 16 seconds from 11×10 5 N suddenly increases to 87×10 5 N, the impact stress increases by 25×10 every 5 seconds. 5 N, causing fatigue cracks in the base plate and air leakage.

[0073] According to the scheme of this embodiment, stress rise linear control is adopted, and the pressure equalization time is extended to 35 seconds. The impact stress increased by 10.9×10 5 N, which is similar to the stress fluctuation level during combustion. The hot blast furnace stress change is kept stable and at a reasonable level, and the equipment of the furnace system steel structure operates smoothly; the equipment damage phenomenon is basically eliminated, and the equipment operation is inherently safe.

[0074] Example 6

[0075] The bottom plate stress real-time monitoring scheme is applied to the oil storage tank filling operation scene. The large storage tanks at the port are as high as 100 meters, and the bottom plate stress of the oil tank filled with oil products is as high as 90×10 4 N, the stress of the bottom plate of the empty tank is about 7×10 4 N or so.

[0076] Through intelligent control of oil injection operation, stress rise linear control is adopted to effectively control the oil injection speed and control the dynamic stress growth per unit time to 5×10 4 N level can further ensure the safe and stable operation of the oil tank.

[0077] Example 7

[0078] The bottom plate stress real-time monitoring scheme is applied to the gas intake operation scene of the blast furnace gas cabinet. The bottom plate stress is 30×10 4 N, the stress of the bottom plate of the empty tank is about 3×10 4 N.

[0079] By intelligently and evenly distributing the air intake flow of the gas cabinet, the stress rise linear control is adopted to effectively control the air intake flow and control the dynamic stress growth per unit time to 1×10 4 N level can further ensure the stable operation of the gas tank.

[0080] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A method for controlling the operation of a furnace tank, characterized in that: A plurality of stress detection devices (3) are arranged along the circumferential direction of the bottom plate (2) of the furnace tank body (1), the stress detection devices (3) detect the upward warping stress of the bottom plate (2), the sum of the data detected by the plurality of stress detection devices (3) is the stress simulation data of the furnace tank body (1), the PLC control system collects the data of the stress detection devices (3), and sends a control signal according to the data to control the operation of the furnace tank body (1); The stress detection devices (3) are arranged in (4-8)×N groups at equal intervals along the circumferential direction of the bottom plate (2) of the furnace tank body (1), where N=1, 2, 3, etc.; The stress detection device (3) comprises a stress sensor (31), a fixed pressing beam (32), an adjustable fixing bolt (33), an adjustable fixing nut (34), a pressing block (35) and a supporting block (36); the stress sensor (31) is arranged on the bottom plate (2); the supporting block (36) is arranged on a foundation (37) beside the furnace tank body (1); the fixed pressing beam (32) is arranged on the stress sensor (31) and the supporting block (36); a hole is opened on the fixed pressing beam (32); one end of the adjustable fixing bolt (33) is fixed in the foundation (37) and passes through the fixed pressing beam (32); the adjustable fixing nut (34) adjusts the position of the fixed pressing beam (32) through the pressing block (35); the ends of the pressing block (35) and the supporting block (36) that contact the fixed pressing beam (32) are both provided with knife edges; The actual stress simulation data of the stress detection device (3) is F 实 = L1÷L2×F 表数值 , L1 is the distance between the center axis of the stress sensor (31) and the center axis of the adjusting fixing bolt (33), L2 is the distance between the center axis of the adjusting fixing bolt (33) and the center axis of the supporting block (36), and the actual stress simulation data of the furnace tank (1) is F 总 =(F 实1 +F 实2 +……F 实n ).

2. The operation control method of a furnace tank according to claim 1, characterized in that: The actual stress simulation data F of the furnace tank (1) 总 The calibration process is: According to the calculated data of 1.3 times the stress of the furnace tank body (1), adjust the initial value F displayed by the system when the furnace tank body (1) is running stably. 总1 ; When the furnace tank (1) is shut down for maintenance, the system displays F 总2 ; Actual stress simulation data F of the furnace tank (1) during stable operation 标 =F 总1 -F 总2 ; When the furnace tank (1) is running stably again, the 标 The value is the system reference value. Re-adjust the fixing nut (34) to complete the calibration of the stress simulation value.

3. The operation control method of a furnace tank according to claim 2, characterized in that: The stress of the furnace tank (1) is linearly controlled, specifically including: After the stress monitoring system is calibrated, the working stress bottom value F is collected. 底 , and peak working stress F 峰 ; Set the threshold F 阈 =(F 峰 -F 底 ) / T÷T1, T is the equipment action time, T1 is the stress collection cycle; Stress rise value per T1 second △F=F 新 -F 前 ; When △F≤F 阈 , furnace tank (1) working equipment continues to move; When △F>F 阈 , the furnace tank (1) working equipment stops and waits for the next cycle; when △F≤F 阈 , the working equipment of the furnace tank (1) resumes operation.

4. The operation control method of a furnace tank according to claim 3, characterized in that: The control process of stress peak safety protection is: When the operating state of the furnace tank (1) changes, the stress threshold F is set. 阈 = α F 标 , α >1; When the operating state of the furnace tank (1) changes and F 阈 ≥ (1.5~1.9) F 标 , issuing a control command to control the valve operation of the furnace tank (1) to be suspended or slowed down; When F 阈 ≤(1.1~1.4)F 标 , issue a control command to control the valve operation of the furnace tank (1) to resume or run normally; When F 阈 ≥ (1.5-1.9) F for 3 consecutive times 标 , issue control instructions, close the valve urgently and stop operation.

5. The operation control method of a furnace tank according to any one of claims 1 to 4, characterized in that: The stress sensor (31) is a pressure type weighing sensor.

6. The operation control method of a furnace tank according to claim 5, characterized in that: The pressure type weighing sensors arranged along the circumferential direction of the bottom plate (2) of the same furnace tank (1) are of the same model.

7. The operation control method of a furnace tank according to claim 6, characterized in that: The fixed pressing beam (32) is a plane structure or a Z-shaped structure; when the bottom plate (2) of the furnace tank body (1) is higher or lower than the foundation (37), the Z-shaped structure is used to fix the pressing beam (32).

Images