Waste heat boiler system capable of automatically adjusting induced draft fan according to temperature

Abstract

The utility model discloses a waste heat boiler system capable of automatically adjusting an induced draft fan according to the temperature. The system comprises a box body and a detection mechanism. An air outlet is formed in the right side of the upper end of the box body, an air inlet is formed in the middle of the front end of the box body, a connecting rod is rotationally connected to the middle of the rear wall of the box body through a bearing, an impeller is arranged on the front side of the outer cambered surface of the connecting rod, and protective covers are arranged on the front side and the rear side of the right end of the box body; and the detection mechanism comprises an output rod, a mounting rod, a half gear and gears, the output rod is rotationally connected to the middle of the right side of the inner cambered surface of the air inlet and the middle of the right wall of the air outlet through bearings, and the gears are arranged on the right side of the outer cambered surface of the output rod. And the probe of the temperature detector can be automatically cleaned, so that the temperature detector quickly returns to normal, and the problem that the detection effect of the temperature detector is affected by water vapor and dust is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler power generation equipment, in particular to a waste heat boiler system that automatically adjusts an induced draft fan according to temperature. Background Art

[0002] The principle of boiler power generation is mainly to use fuel combustion to generate heat energy, which in turn heats water into steam. The steam is then used to drive the steam turbine to rotate, converting the heat energy into mechanical energy. Finally, the steam turbine drives the generator to generate electricity. Some manufacturers use the excess heat generated during the sintering machine production process to heat the boiler for power generation.

[0003] During the power generation process, the boiler operator usually manually adjusts the boiler induced draft fan frequency based on the boiler steam temperature and the sintering machine flue gas outlet temperature measured on a computer. Alternatively, the sintering machine operator contacts the boiler operator by phone based on the sintering machine operating conditions, and the boiler operator then adjusts the boiler induced draft fan frequency.

[0004] During operation, existing boiler induced draft fans (IDFs) often fail to adjust their operating frequency in a timely manner due to the numerous operating parameters monitored by the boiler generator unit, the rapid production pace of the sintering machine, and the lack of timely communication. This results in excessively high or low operating temperatures in the sintering machine, and prevents all of the sintering machine's effective heat from being used for power generation, leading to production disruptions and energy waste. Some waste heat boilers (WHRS) automatically adjust their IDF systems based on temperature. During operation, temperature detection equipment uses probes to measure the sintering machine flue gas outlet temperature and the boiler air inlet temperature. A control device compares the two sets of data and then controls the operating frequency of the boiler IDF to maintain the optimal flue gas temperature. However, after extended operation, dust and water vapor in the flue gas can coat the outside of the probes, ultimately causing the detection equipment to trip and affect its detection performance. While operations and maintenance personnel can be contacted on-site to clean the detection probes, this method is cumbersome and takes a relatively long time for the temperature detection equipment to return to normal operation. Therefore, we propose a WHRS automatic IDF system based on temperature. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a waste heat boiler automatic induced draft fan system according to the temperature. Through the cooperation of the half gear and the gear, the position of the cleaning brush can be adjusted. During the movement of the cleaning brush, the cleaning brush cleans the probe of the temperature detector, so that the temperature detector can quickly return to normal, solving the problem that the detection effect of the temperature detector is affected by water vapor and dust, and can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present utility model provides the following technical solutions: a waste heat boiler automatic adjustment of induced draft fan system according to temperature, comprising a box body and a detection mechanism;

[0007] Box body: An exhaust port is provided on the right side of its upper end, an air inlet is provided in the middle of the front end of the box body, a connecting rod is rotatably connected to the middle of the rear wall of the box body through a bearing, an impeller is provided on the front side of the outer arc surface of the connecting rod, and protective covers are provided on both the front and rear sides of the right end of the box body;

[0008] Detection mechanism: It includes an output rod, a mounting rod, a half gear and a gear. The output rod is rotatably connected to the middle of the right side of the inner arc surface of the air inlet and the middle of the right wall of the exhaust outlet through a bearing. Gears are provided on the right side of the outer arc surface of the output rod. The mounting rods are rotatably connected to the lower side of the right wall of the protective cover through bearings. A half gear is provided on the left side of the outer arc surface of the mounting rod. The half gears are respectively installed in conjunction with the vertically adjacent gears. Through the coordination of the half gear and the gear, the position of the cleaning brush can be adjusted. During the movement of the cleaning brush, the cleaning brush cleans the probe of the temperature detector, thereby allowing the temperature detector to quickly return to normal, solving the problem of water vapor and dust affecting the detection effect of the temperature detector.

[0009] Furthermore, it also includes a single-chip microcomputer, which is arranged at the front end of the box. The input end of the single-chip microcomputer is electrically connected to the external power supply and can regulate the electrical components inside the device.

[0010] Furthermore, the detection mechanism also includes a temperature detector, which is arranged at the right end of the box, and the temperature detector is located inside the protective cover. The probes arranged at the left end of the temperature detector are respectively located inside the exhaust pipe and the air inlet. The temperature detectors are bidirectionally electrically connected to the single-chip microcomputer and can detect the sintering machine flue gas outlet temperature and the boiler air inlet temperature.

[0011] Furthermore, the detection mechanism also includes a torsion spring, which is movably mounted on the outside of the right side of the output rod, the left end of the torsion spring is fixedly connected to the right end of the box, and the right end of the torsion spring is fixedly connected to the outer arc surface of the laterally adjacent output rod, and can drive the cleaning brush to move and reset through the output rod.

[0012] Furthermore, the detection mechanism also includes a fixing plate, a cleaning brush and a limit rod. The fixing plates are all arranged on the left side of the outer arc surface of the output rod. A cleaning brush is provided on the upper end of the fixing plate. The limit rods are respectively arranged inside the exhaust port and the air inlet. The fixing plates are respectively located between two longitudinally adjacent limit rods, and can clean the probe of the temperature detector.

[0013] Furthermore, it also includes a servo motor, which is arranged at the right end of the protective cover, and the left end of the servo motor output shaft is fixedly connected to the right end of the laterally adjacent mounting rod. The input end of the servo motor is electrically connected to the output end of the single-chip computer, and can drive the half gear to rotate through the mounting rod.

[0014] Furthermore, it also includes a drive motor, which is arranged in the middle of the rear end of the box body, the front end of the drive motor output shaft is fixedly connected to the rear end of the connecting rod, the input end of the drive motor is electrically connected to the output end of the single-chip computer, and can drive the impeller to rotate through the connecting rod.

[0015] Compared with the existing technology, the beneficial effects of the utility model are: the waste heat boiler automatically adjusts the induced draft fan system according to the temperature, which has the following advantages:

[0016] When the temperature detector jumps, the servo motor starts running through the regulation of the single-chip microcomputer, and the output shaft of the servo motor drives the mounting rod to rotate, and the mounting rod drives the half gear to rotate. When the half gear is meshed with the gear, the gear drives the fixed plate to rotate forward through the output rod, and the fixed plate drives the cleaning brush to rotate forward, and the torsion spring is twisted. When the half gear is separated from the gear, the torque generated by the rotation and reset of the torsion spring drives the fixed plate to rotate backward and reset through the output rod, and the fixed plate drives the cleaning brush to rotate backward and reset, thereby driving the cleaning brush to reciprocate. During the movement of the cleaning brush, the cleaning brush cleans the probe of the temperature detector, so that the temperature detector quickly returns to normal, and the detection work can be continued. Through the coordination setting of the half gear and the gear, the position of the cleaning brush can be adjusted. During the movement of the cleaning brush, the cleaning brush cleans the probe of the temperature detector, so that the temperature detector quickly returns to normal, solving the problem that the detection effect of the temperature detector is affected by water vapor and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the rear structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the front side cross-sectional structure of the utility model;

[0020] Figure 4 It is a structural diagram of the detection mechanism of the utility model.

[0021] In the figure: 1 box, 2 single-chip microcomputer, 3 exhaust vent, 4 air inlet, 5 protective cover, 6 detection mechanism, 61 output rod, 62 fixing plate, 63 cleaning brush, 64 temperature detector, 65 mounting rod, 66 half gear, 67 gear, 68 torsion spring, 69 limit rod, 7 servo motor, 8 connecting rod, 9 impeller, 10 drive motor. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-4 ,This embodiment provides a technical solution: a waste heat boiler automatic adjustment of induced draft fan system according to temperature, including a box 1 and a detection mechanism 6;

[0024] Box body 1: An exhaust port 3 is provided on the right side of its upper end, an air inlet 4 is provided in the middle of the front end of the box body 1, a connecting rod 8 is rotatably connected to the middle of the rear wall of the box body 1 through a bearing, an impeller 9 is provided on the front side of the outer arc surface of the connecting rod 8, and a protective cover 5 is provided on both the front and rear sides of the right end of the box body 1. Before work, the exhaust port 3 is connected to the external boiler equipment, and the air inlet 4 is connected to the external sintering machine. During work, the driving device starts to run through the regulation of the control device, and the output shaft of the driving device drives the impeller 9 to rotate. The impeller 9 generates suction during the rotation, thereby sucking the excess heat generated in the production process of the sintering machine into the interior of the box body 1 through the air inlet 4, and then discharged into the interior of the boiler equipment through the exhaust port 3, so that the excess heat generated in the production process of the sintering machine is used to heat the boiler, and finally the boiler is used to generate electricity;

[0025] Detection mechanism 6: It includes an output rod 61, a mounting rod 65, a half gear 66 and a gear 67. The output rod 61 is rotatably connected to the middle of the right side of the inner arc surface of the air inlet 4 and the middle of the right wall of the air outlet 3 through a bearing. A gear 67 is provided on the right side of the outer arc surface of the output rod 61. The mounting rods 65 are rotatably connected to the lower side of the right wall of the protective cover 5 through a bearing. A half gear 66 is provided on the left side of the outer arc surface of the mounting rod 65. The half gear 66 is respectively installed with the vertically adjacent gear 67. The detection mechanism 6 also includes a temperature detector 64. The temperature detector 64 is arranged at the right end of the box body 1. The temperature detector 64 is located inside the protective cover 5. The probes arranged at the left end of the temperature detector 64 are respectively located inside the exhaust pipe 3 and the air inlet 4. The temperature detectors 64 are both electrically connected to the single-chip microcomputer 2 in both directions. The detection mechanism 6 also includes a torsion spring 68, which is movably sleeved on the outside of the right side of the output rod 61. The left ends of the torsion springs 68 are fixedly connected to the right end of the box body 1, and the right ends of the torsion springs 68 are respectively fixedly connected to the outer arc surfaces of the laterally adjacent output rods 61. The detection mechanism 6 also includes a fixing plate 62, a cleaning brush 63 and a limiting rod 69. The fixing plates 62 are all arranged on the left side of the outer arc surface of the output rod 61. The upper ends of the fixing plates 62 are provided with cleaning brushes 63, and the limiting rods 69 are respectively arranged on the exhaust pipe 3 and the air inlet Inside the air outlet 4, the fixed plate 62 is respectively located between two longitudinally adjacent limit rods 69. When the temperature detector 64 jumps, the driving device starts to run through the regulation of the control device, and the output shaft of the driving device drives the mounting rod 65 to rotate, and the mounting rod 65 drives the half gear 66 to rotate. When the half gear 66 is meshed with the gear 67, the gear 67 drives the fixed plate 62 to rotate forward through the output rod 61, and the fixed plate 62 drives the cleaning brush 63 to rotate forward, and the torsion spring 68 is twisted. When the half gear 66 is separated from the gear 67, the torsion spring 68 rotates and resets to generate a torque that drives the fixed plate 62 to rotate backward and reset through the output rod 61. The fixing plate 62 drives the cleaning brush 63 to rotate backward and reset, thereby driving the cleaning brush 63 to reciprocate. During the movement of the cleaning brush 63, the cleaning brush 63 cleans the probe of the temperature detector 64, so that the temperature detector 64 quickly returns to normal, and the detection work can be continued. Through the cooperation of the half gear 66 and the gear 67, the position of the cleaning brush 63 can be adjusted. During the movement of the cleaning brush 63, the cleaning brush 63 cleans the probe of the temperature detector 64, so that the temperature detector 64 quickly returns to normal, solving the problem that water vapor and dust affect the detection effect of the temperature detector 64.

[0026] Among them: it also includes a single-chip microcomputer 2, which is arranged at the front end of the box 1. The input end of the single-chip microcomputer 2 is electrically connected to the external power supply and can regulate the electrical components inside the device.

[0027] Wherein: it also includes a servo motor 7, which is arranged at the right end of the protective cover 5, and the left end of the output shaft of the servo motor 7 is fixedly connected to the right end of the laterally adjacent mounting rod 65, and the input end of the servo motor 7 is electrically connected to the output end of the single-chip computer 2. When the servo motor 7 starts to run, the output shaft of the servo motor 7 drives the mounting rod 65 to rotate, and the mounting rod 65 drives the half gear 66 to rotate. When the half gear 66 is meshed with the gear 67, the gear 67 drives the fixed plate 62 to rotate forward through the output rod 61, and the fixed plate 62 drives the cleaning brush 63 to rotate forward, and the torsion spring 68 is twisted. When the half gear 66 is separated from the gear 67, the torsion spring 68 rotates and resets to generate a torsion force that drives the fixed plate 62 to rotate backward and reset through the output rod 61, and the fixed plate 62 drives the cleaning brush 63 to rotate backward and reset, thereby driving the cleaning brush 63 to reciprocate. During the movement of the cleaning brush 63, the cleaning brush 63 cleans the probe of the temperature detector 64.

[0028] Among them: it also includes a drive motor 10, the drive motor 10 is arranged in the middle of the rear end of the box body 1, the front end of the output shaft of the drive motor 10 is fixedly connected to the rear end of the connecting rod 8, and the input end of the drive motor 10 is electrically connected to the output end of the single-chip computer 2. When working, the drive motor 10 starts to run through the regulation of the single-chip computer 2, and the output shaft of the drive motor 10 drives the impeller 9 to rotate. The impeller 9 generates suction during the rotation process, thereby sucking the excess heat generated during the production process of the sintering machine into the interior of the box body 1 through the air inlet 4, and then discharged into the interior of the boiler equipment through the exhaust port 3, so that the excess heat generated during the production process of the sintering machine is used to heat the boiler, and finally the boiler is used to generate electricity.

[0029] The working principle of the waste heat boiler provided by the present invention which automatically adjusts the induced draft fan system according to the temperature is as follows: before operation, the exhaust port 3 is connected to the external boiler equipment, and the air inlet 4 is connected to the external sintering machine. During operation, the drive motor 10 starts to run through the regulation of the single-chip microcomputer 2, and the output shaft of the drive motor 10 drives the impeller 9 to rotate. The impeller 9 generates suction during the rotation, thereby sucking the excess heat generated during the production process of the sintering machine into the interior of the box 1 through the air inlet 4, and then discharged into the interior of the boiler equipment through the exhaust port 3, so that the excess heat generated during the production process of the sintering machine is used to heat the boiler, and finally the boiler is used to generate electricity. During the rotation of the impeller 9, the temperature detector 64 detects the temperatures in the exhaust port 3 and the air inlet 4 respectively, and the temperature detector 64 transmits the detected data to the single-chip microcomputer 2 in real time. After the single-chip microcomputer 2 compares and judges the sintering machine flue gas outlet temperature and the boiler air inlet temperature, the single-chip microcomputer 2 controls the drive motor. 10 operating frequency, so that the sintering machine flue gas temperature is maintained at the optimal operating temperature, and the excess heat can be used for boiler power generation. When the temperature detector 64 jumps, the servo motor 7 starts to run through the control of the single-chip microcomputer 2, and the output shaft of the servo motor 7 drives the mounting rod 65 to rotate, and the mounting rod 65 drives the half gear 66 to rotate. When the half gear 66 is meshed with the gear 67, the gear 67 drives the fixed plate 62 to rotate forward through the output rod 61, and the fixed plate 62 drives the cleaning brush 63 to rotate forward, and the torsion spring 68 is twisted. When the half gear 66 is separated from the gear 67, the torsion spring 68 rotates and resets to generate a torque that drives the fixed plate 62 to rotate backward and reset through the output rod 61, and the fixed plate 62 drives the cleaning brush 63 to rotate backward and reset, thereby driving the cleaning brush 63 to reciprocate. During the movement of the cleaning brush 63, the cleaning brush 63 cleans the probe of the temperature detector 64, so that the temperature detector 64 quickly returns to normal and continues the detection work.

[0030] It is worth noting that the single chip microcomputer 2 disclosed in the above embodiment can be 6ES7414-3EM05-0AB0, the temperature detector 64 can be OHR-E700, the servo motor 7 can be ECMA-C20604RS, and the drive motor 10 can be 5I K200A-AF. The single chip microcomputer 2 controls the operation of the temperature detector 64, the servo motor 7 and the drive motor 10 using methods commonly used in the prior art.

[0031] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A waste heat boiler automatic induced draft fan system according to temperature, characterized by: It comprises a box (1) and a detection mechanism (6); The box body (1) is provided with an air outlet (3) on the right side of its upper end, an air inlet (4) is provided in the middle of the front end of the box body (1), a connecting rod (8) is rotatably connected to the middle of the rear wall of the box body (1) through a bearing, an impeller (9) is provided on the front side of the outer arc surface of the connecting rod (8), and protective covers (5) are provided on both the front and rear sides of the right end of the box body (1); The detection mechanism (6) comprises an output rod (61), a mounting rod (65), a half gear (66) and a gear (67). The output rod (61) is rotatably connected to the middle of the right side of the inner arc surface of the air inlet (4) and the middle of the right wall of the air outlet (3) through a bearing. The right side of the outer arc surface of the output rod (61) is provided with a gear (67). The mounting rod (65) is rotatably connected to the lower side of the right wall of the protective cover (5) through a bearing. The left side of the outer arc surface of the mounting rod (65) is provided with a half gear (66). The half gear (66) is respectively mounted in conjunction with the vertically adjacent gear (67).

2. The waste heat boiler automatic induced draft fan system according to claim 1, characterized in that: It also includes a single-chip microcomputer (2), which is arranged at the front end of the box body (1), and the input end of the single-chip microcomputer (2) is electrically connected to an external power supply.

3. The waste heat boiler automatic induced draft fan system according to claim 2, characterized in that: The detection mechanism (6) further includes a temperature detector (64), which is arranged at the right end of the box (1). The temperature detector (64) is located inside the protective cover (5). The probes arranged at the left end of the temperature detector (64) are respectively located inside the exhaust pipe (3) and the air inlet (4). The temperature detector (64) is bidirectionally electrically connected to the single-chip computer (2).

4. The waste heat boiler automatic induced draft fan system according to claim 1, characterized in that: The detection mechanism (6) further comprises a torsion spring (68), each of the torsion springs (68) being movably sleeved on the outside of the right side of the output rod (61), the left end of the torsion spring (68) being fixedly connected to the right end of the box (1), and the right end of the torsion spring (68) being fixedly connected to the outer arc surface of the laterally adjacent output rod (61).

5. The waste heat boiler automatic induced draft fan system according to claim 1 is characterized by: The detection mechanism (6) further comprises a fixing plate (62), a cleaning brush (63) and a limiting rod (69). The fixing plate (62) is arranged on the left side of the outer arc surface of the output rod (61). The upper end of the fixing plate (62) is provided with a cleaning brush (63). The limiting rod (69) is respectively arranged inside the air outlet (3) and the air inlet (4). The fixing plate (62) is respectively located between two longitudinally adjacent limiting rods (69).

6. The waste heat boiler automatic induced draft fan system according to claim 2, characterized in that: The invention also includes a servo motor (7), which is arranged at the right end of the protective cover (5), the left end of the output shaft of the servo motor (7) is fixedly connected to the right end of the laterally adjacent mounting rod (65), and the input end of the servo motor (7) is electrically connected to the output end of the single chip computer (2).

7. The waste heat boiler automatic induced draft fan system according to claim 2, characterized in that: The invention also includes a drive motor (10), wherein the drive motor (10) is arranged in the middle of the rear end of the box body (1), the front end of the output shaft of the drive motor (10) is fixedly connected to the rear end of the connecting rod (8), and the input end of the drive motor (10) is electrically connected to the output end of the single chip computer (2).

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