Heat exchange ball detection system and method based on spherical heat exchange unit

Abstract

The invention belongs to the technical field of heat exchange ball detection, and relates to a heat exchange ball detection system and method based on a spherical heat exchange unit, and the detection system comprises a heat absorption space (1) which accommodates a heat exchange ball and is used for enabling the heat exchange ball in the heat absorption space (1) to be in full contact with flue gas and absorbing heat energy in the flue gas; heat exchange balls are contained in the heat exchange space (2), and the heat exchange balls in the heat exchange space (2) make full contact with normal-temperature air and release absorbed heat; the heat exchange ball transfer equipment (3) is used for conveying the heat exchange balls in the heat absorption space (1) to the heat exchange space (2) and conveying the heat exchange balls in the heat exchange space (2) to the heat absorption space (1) to form heat exchange circulation; the detection unit (4) is used for detecting the heat exchange balls output from the heat absorption space (1) and removing the heat exchange balls with faults from the heat exchange circulation, and the detection efficiency and accuracy can be effectively improved so as to ensure the stability of the heat exchange circulation.

Description

Technical Field

[0001] The invention belongs to heat exchange ball detection technology, and relates to a heat exchange ball detection system and method based on a spherical heat exchange unit. Background Art

[0002] Air preheater (referred to as air preheater) is a heat exchange equipment widely used in industrial boilers, power plants, chemical plants and other fields. Its main function is to use the waste heat of flue gas to preheat the air entering the combustion chamber, thereby improving combustion efficiency, saving energy and reducing pollutant emissions. Traditional air preheaters mostly use tubular or plate structures. Although they can achieve heat exchange to a certain extent, they have problems such as low heat exchange efficiency, easy ash accumulation and high maintenance cost under high-temperature flue gas conditions.

[0003] In recent years, air preheaters based on spherical heat exchange units have gradually attracted attention due to their performance advantages of efficient heat exchange, high flexibility, strong anti-coronavirus ability and high temperature resistance. Spherical heat exchange units are usually composed of a shell encapsulating a phase change medium, presenting a semi-hollow shape. During the cyclic heat transfer process, due to extrusion, friction, thermal expansion and contraction, deformation, breakage, leakage of phase change medium, etc. will occur, thereby polluting the working environment and losing heat transfer efficiency. Damaged heat exchange units need to be identified in a timely manner and removed from the heat exchange cycle, but the existing detection methods have problems such as low detection accuracy and complex detection process, which are difficult to meet actual needs. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problem and to provide a heat exchange ball detection system and method based on a spherical heat exchange unit.

[0005] To achieve the above object, the present invention provides a heat exchange ball detection system based on a spherical heat exchange unit, comprising:

[0006] The heat absorbing space contains heat exchanging balls, which are used to make the heat exchanging balls in the heat absorbing space fully contact with the flue gas and absorb the heat energy in the flue gas;

[0007] The heat exchange space contains heat exchange balls, which are used to make the heat exchange balls in the heat exchange space fully contact with the air at normal temperature and release the absorbed heat;

[0008] Heat exchange ball transfer equipment, used to realize the heat exchange balls in the heat absorption space to be transferred to the heat exchange space and to realize the heat exchange balls in the heat exchange space to be transferred to the heat absorption space, so as to form a heat exchange cycle;

[0009] The detection unit is used to detect the heat exchange balls output from the heat absorption space and remove the faulty heat exchange balls from the heat exchange cycle.

[0010] Furthermore, a valve structure is provided at the lower side of the heat absorption space.

[0011] Furthermore, the heat exchange ball transfer equipment is a circulation lift.

[0012] Furthermore, the detection unit comprises:

[0013] a fan valve located on one side of the valve structure;

[0014] The inspection platform is located at the lower side of the fan-shaped valve and is provided with a conveying channel, the conveying channel is connected to the heat exchange ball transfer device and is used to convey normal heat exchange balls. The inspection platform is provided with a lateral channel, and a recovery frame is provided below the lateral channel. The lateral channel and the recovery frame are used to remove faulty heat exchange balls.

[0015] The testing platform is provided with testing equipment.

[0016] Furthermore, the detection device is one or more of a weighing sensor, an infrared temperature sensor and a vibration sensor installed on the detection platform.

[0017] The present invention also provides a detection method according to the above detection system, comprising:

[0018] The heat-absorbing ball in the heat-absorbing space falls through the valve structure, and is controlled by the fan valve so that only one heat-exchanging ball falls on the inspection table at a time. The heat-exchanging ball is inspected by the inspection equipment installed on the inspection table. If the inspection result is a fault, it enters the recovery frame through the side channel. If the inspection result is no fault, it enters the heat-exchanging ball transfer equipment through the conveying channel.

[0019] Furthermore, the detection equipment on the detection table is used to detect the heat exchange ball and includes:

[0020] Weighing test: The weighing sensor at the bottom of the test bench determines the weight according to the standard weight range. If it exceeds the range, it will be judged as a fault and tilted to the recovery frame. If it is qualified, it will proceed to the next step;

[0021] Infrared detection: The infrared temperature sensor on the test bench side identifies the temperature according to the standard temperature range. If the deviation is large, it is judged as a fault and tilted to the recovery frame. If it is qualified, it will proceed to the next step;

[0022] Vibration detection: The vibration sensor of the test platform determines according to the standard vibration frequency range. If it exceeds the range, it will be judged as a fault and sent to the recovery frame by tilting sideways. If it passes the test, the test platform will tilt it forward and send it into the circulation lift.

[0023] The beneficial effects of the present invention are as follows:

[0024] The heat exchange ball system and method based on the spherical heat exchange unit of the present invention can effectively improve the detection efficiency and accuracy to ensure the stability of the heat exchange cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1A schematic diagram showing a structure of a detection system for a heat exchange ball based on a spherical heat exchange unit according to an embodiment of the present invention;

[0026] Figure 2 The figure schematically shows the structure of a detection unit according to one embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0029] Combination Figure 1 and Figure 2 As shown, the present invention provides a heat exchange ball detection system based on a spherical heat exchange unit, comprising: a heat absorption space 1, a heat exchange space 2, a heat exchange ball transfer device 3 and a detection unit 4. The heat absorption space 1 is responsible for accommodating heat exchange balls, which are used to make the heat exchange balls in the heat absorption space 1 fully contact with the flue gas and absorb the heat energy in the flue gas. The heat exchange space 2 is responsible for accommodating heat exchange balls, which are used to make the heat exchange balls in the heat exchange space 2 fully contact with the air at normal temperature and release the absorbed heat. The heat exchange ball transfer device 3 is configured as a circulation lift in this embodiment, which is used to realize the transportation of the heat exchange balls in the heat absorption space 1 to the heat exchange space 2 and the transportation of the heat exchange balls in the heat exchange space 2 to the heat absorption space 1, forming a heat exchange cycle. The detection unit 4 is used to detect the heat exchange balls output from the heat absorption space 1, and remove the faulty heat exchange balls from the heat exchange cycle.

[0030] According to one embodiment of the present invention, a valve structure 5 is provided at the lower side of the heat absorption space 1. The detection unit 4 includes a fan valve 41 and a detection platform 42, and the fan valve 41 is located on one side of the valve structure 5. The detection platform 42 is located at the lower side of the fan valve 41, and is provided with a conveying channel 43, and the conveying channel 43 is connected to the heat exchange ball transfer device 3 for conveying normal heat exchange balls. A lateral channel 44 is provided on the detection platform 42, and a recovery frame 45 is provided below the lateral channel 44. The lateral channel 44 and the recovery frame 45 are used to remove faulty heat exchange balls. A detection device is provided on the detection platform 42, and the detection device is one or more of a weighing sensor, an infrared temperature sensor and a vibration sensor installed on the detection platform 42. In this embodiment, a weighing sensor, an infrared temperature sensor and a vibration sensor are installed on the detection platform 42 at the same time.

[0031] The detection method using the detection system based on the spherical heat exchange unit of the present invention is as follows: the heat exchange ball in the heat absorption space 1 falls through the valve structure 5, and is controlled by the fan valve 41 so that only one heat exchange ball falls on the detection platform 42 at a time. The heat exchange ball is detected by the detection equipment arranged on the detection platform 42. If the detection result is a fault, the heat exchange ball enters the recovery frame 45 through the lateral channel 44. If the detection result is no fault, the heat exchange ball enters the heat exchange ball transfer device 3 through the conveying channel 43.

[0032] The weighing sensor is installed at the bottom of the test platform 42, the infrared temperature sensor is installed on one side of the test platform 42, and the vibration sensor is installed at the bottom or side of the test platform 42. The weighing sensor can set a standard weight range, such as ±5% of the standard weight of the heat exchange ball. If the weight of the heat exchange ball exceeds the standard weight range, it is directly determined as a faulty heat exchange ball, and the test platform is tilted to the side to send it to the recycling box. If the weight of the heat exchange ball is within the standard weight range, the next step of detection is entered.

[0033] The detection logic of infrared temperature is set as follows: if the heat exchange ball is damaged, the phase change heat material will be lost, resulting in a decrease in the heat storage capacity of the heat exchange ball, and the temperature will drop significantly faster than a normal heat exchange ball; set a standard temperature range, such as the temperature in the heat absorption space ±10°C. If the temperature deviation of the heat exchange ball and the temperature collected by the temperature detection device in the heat absorption space exceeds the standard range, it is determined to be a faulty heat exchange ball, and the detection table is tilted to the side to send it to the recovery box. If the temperature of the heat exchange ball is within the standard temperature range, proceed to the next step of detection.

[0034] The detection logic of the vibration sensor is set to set a standard vibration frequency range. If the vibration frequency of the heat exchange ball is within the standard range, the detection table will tilt forward and send the heat exchange ball into the circulation lift. If the vibration frequency of the heat exchange ball exceeds the standard range, the detection table will tilt sideways and send the faulty heat exchange ball into the recovery box.

[0035] According to one embodiment of the present invention, the test platform should be designed to be tiltable so that the heat exchange balls can be sent to different paths according to the test results. According to the concept of the present invention, the setting method of the test platform being tiltable is not limited. For example, it can be set to use an electric push rod or a cylinder to control the tilt direction of the test platform to ensure accurate and reliable action.

[0036] The heat exchange ball detection system based on the spherical heat exchange unit of the present invention uses a PLC or a computer as a control system, which is responsible for receiving sensor data, executing judgment logic, and controlling the tilting action of the detection table. And record the results of each detection, including the weight, temperature and vibration frequency of the heat exchange ball, for subsequent analysis and maintenance. At the same time, when a faulty heat exchange ball is detected, the control system should trigger an alarm to remind the operator to handle it, so as to record the relevant information of the faulty heat exchange ball, including the fault type, detection time, etc., for subsequent analysis and improvement.

[0037] The heat exchange ball detection system and method based on the spherical heat exchange unit of the present invention have the following advantages:

[0038] 1. Improve detection accuracy: By combining weighing, infrared temperature and vibration detection, the failure of the heat exchange ball can be identified comprehensively and accurately, and the detection accuracy can be improved.

[0039] 2. Reduce maintenance costs: Timely identification and replacement of faulty heat exchange balls can avoid system performance degradation and increased maintenance costs caused by faulty heat exchange balls.

[0040] 3. Improve system stability: Through real-time monitoring and dynamic adjustment, ensure the stable operation of the system under different working conditions and improve the overall performance and reliability of the system.

[0041] 4. Reduce environmental pollution: Timely identification and treatment of faulty heat exchange balls can avoid leakage of phase change media, reduce pollution to the working environment, and protect the environment.

[0042] 5. Improve work efficiency: Automated detection and processing processes can reduce manual intervention, improve work efficiency and reduce labor intensity.

[0043] The above is only one embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat exchange ball detection system based on a spherical heat exchange unit, characterized in that: include: The heat absorbing space (1) contains heat exchange balls, which are used to make the heat exchange balls in the heat absorbing space (1) fully contact with the flue gas and absorb heat energy in the flue gas; The heat exchange space (2) contains heat exchange balls, which are used to make the heat exchange balls in the heat exchange space (2) fully contact with the air at normal temperature and release the absorbed heat; The heat exchange ball transfer device (3) is used to realize the transfer of the heat exchange balls in the heat absorption space (1) to the heat exchange space (2) and the transfer of the heat exchange balls in the heat exchange space (2) to the heat absorption space (1), so as to form a heat exchange cycle; The detection unit (4) is used to detect the heat exchange balls output from the heat absorption space (1) and remove the faulty heat exchange balls from the heat exchange cycle.

2. The heat exchange ball detection system based on the spherical heat exchange unit according to claim 1 is characterized in that: A valve structure (5) is provided on the lower side of the heat absorption space (1).

3. The heat exchange ball detection system based on the spherical heat exchange unit according to claim 2 is characterized in that: The heat exchange ball transfer device (3) is a circulation lift.

4. The heat exchange ball detection system based on the spherical heat exchange unit according to claim 2 is characterized in that: The detection unit (4) comprises: A fan-shaped valve (41), located on one side of the valve structure (5); The inspection platform (42) is located at the lower side of the fan-shaped valve (41) and is provided with a conveying channel (43). The conveying channel (43) is connected to the heat exchange ball transfer device (3) and is used to convey normal heat exchange balls. The inspection platform (42) is provided with a lateral channel (44). A recovery frame (45) is provided below the lateral channel (44). The lateral channel (44) and the recovery frame (45) are used to remove faulty heat exchange balls. The detection platform (42) is provided with detection equipment.

5. The heat exchange ball detection system based on the spherical heat exchange unit according to claim 4 is characterized in that: The detection device is one or more of a weighing sensor, an infrared temperature sensor and a vibration sensor installed on the detection platform (42).

6. The detection method of the heat exchange ball detection system based on the spherical heat exchange unit according to any one of claims 1 to 5, comprising: The heat-absorbing balls in the heat-absorbing space (1) fall through the valve structure (5) and are controlled by the fan valve (41) so that only one heat-exchanging ball falls onto the detection table (42) at a time. The heat-exchanging balls are detected by the detection equipment arranged on the detection table (42). If the detection result shows that there is a fault, the balls enter the recovery frame (45) through the lateral channel (44). If the detection result shows that there is no fault, the balls enter the heat-exchanging ball transfer device (3) through the conveying channel (43).

7. The detection method according to claim 6, characterized in that: The detection equipment on the detection table (42) is used to detect the heat exchange ball and includes: Weighing test: The weighing sensor at the bottom of the test bench determines the weight according to the standard weight range. If it exceeds the range, it will be judged as a fault and tilted to the recovery frame. If it is qualified, it will proceed to the next step; Infrared detection: The infrared temperature sensor on the test bench side identifies the temperature according to the standard temperature range. If the deviation is large, it is judged as a fault and tilted to the recovery frame. If it is qualified, it will proceed to the next step; Vibration detection: The vibration sensor of the test platform determines according to the standard vibration frequency range. If it exceeds the range, it will be judged as a fault and sent to the recovery frame by tilting sideways. If it passes the test, the test platform will tilt it forward and send it into the circulation lift.

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