Heat exchanger dry combustion prevention detection method, device, equipment and readable storage medium

Abstract

The application discloses a heat exchanger dry burning prevention detection method, device and equipment and a readable storage medium. The heat exchanger dry burning prevention detection method is used for detecting whether any one of a plurality of groups of heat exchangers is in a dry burning state. The method comprises the following steps: presetting a temperature difference threshold value of two groups of heat exchangers; detecting actual temperature values of the plurality of groups of heat exchangers; obtaining actual temperature difference values of any two groups of heat exchangers; and comparing the actual temperature difference values with the temperature difference threshold value. If the actual temperature difference values are greater than the temperature difference threshold value, the heat exchanger is in the dry burning state. The application solves the technical problem that the heat exchanger is easily damaged in the dry burning state.

Description

Technical Field

[0001] This invention relates to the field of pickling equipment, and further to a method, apparatus, device, and readable storage medium for detecting the prevention of dry burning of a heat exchanger, particularly a method, apparatus, device, and readable storage medium for detecting the prevention of a graphite heat exchanger from being in a dry-burning state. Background Technology

[0002] Pickling is a method of removing oxide scale and corrosion from the surface of an object using an acid solution. The core component of pickling equipment is the graphite heat exchanger, which is not only expensive to manufacture but also difficult to maintain. According to the normal operating standards of graphite heat exchangers, the heat resistance temperature of the graphite blocks (or graphite plates) in the graphite heat exchanger should not exceed 150℃. However, during normal operation, acid liquid needs to be introduced into the graphite heat exchanger, along with hot steam or coolant, for heat exchange between the hot steam or coolant and the acid liquid. But in actual operation, the temperature of the hot steam is between 150℃ and 180℃, which exceeds the upper limit of the heat resistance of the graphite blocks (or graphite plates) in the graphite heat exchanger. The continuous high temperature will cause the valves controlling the hot steam supply to deviate from their control quantity and action. As a result, when hot steam is not needed (i.e., when acid supply is stopped), the valves cannot be completely closed, leading to dry burning of the heat exchanger (no acid is being supplied to the heat exchanger, but hot steam continues to be supplied). This causes damage and leakage to the graphite blocks (or graphite plates). When acid liquid is introduced again, leakage will occur, and the outer shell of the graphite heat exchanger will be corroded.

[0003] In addition, during long-term operation, the channels for transporting acid in the graphite block (or graphite plate) may become blocked. If the blockage results in a lack of continuous heat exchange of acid, it can also cause the heat exchanger to burn out and be damaged.

[0004] There is currently no effective solution to the problem of heat exchangers being easily damaged by dry burning in related technologies.

[0005] Therefore, based on years of experience and practice in related industries, the inventor proposes a method, device, equipment, and readable storage medium for detecting dry burning of heat exchangers, in order to overcome the shortcomings of the prior art. Summary of the Invention

[0006] The purpose of this invention is to provide a method, apparatus, device, and readable storage medium for detecting dry burning of heat exchangers. By comparing the collected temperature values ​​of different heat exchangers, abnormal temperature conditions of the heat exchangers can be detected in a timely manner, thereby preventing the heat exchangers from being damaged by dry burning.

[0007] The objective of this invention can be achieved through the following methods:

[0008] This invention provides a method for detecting dry-burning prevention of heat exchangers, used to detect if any one of multiple heat exchangers is in a dry-burning state. The method includes:

[0009] A preset temperature difference threshold is established for the two sets of heat exchangers.

[0010] Detect the actual temperature values ​​of multiple sets of the aforementioned heat exchangers;

[0011] Obtain the actual temperature difference between any two sets of heat exchangers;

[0012] The actual temperature difference value is compared with the temperature difference threshold. If the actual temperature difference value is greater than the temperature difference threshold, the heat exchanger is in a dry-burning state.

[0013] In a preferred embodiment of the present invention, the temperature difference threshold includes a first temperature difference threshold preset at the hot steam outlet of two sets of heat exchangers;

[0014] The detection of the actual temperature values ​​of multiple sets of heat exchangers includes:

[0015] With acid flow to the heat exchanger stopped, the first actual temperature value at the hot steam outlet of the heat exchanger is detected.

[0016] In a preferred embodiment of the present invention, if the first actual temperature difference value is greater than the first temperature difference threshold, a first alarm signal is sent.

[0017] In a preferred embodiment of the present invention, the temperature difference threshold includes a second temperature difference threshold preset at the acid outlet of two sets of heat exchangers;

[0018] The detection of the actual temperature values ​​of multiple sets of heat exchangers includes:

[0019] While continuously supplying acid into the heat exchanger, the second actual temperature value at the acid outlet of the heat exchanger is detected.

[0020] In a preferred embodiment of the present invention, if the second actual temperature difference value is greater than the second temperature difference threshold, a second alarm signal is sent.

[0021] In a preferred embodiment of the present invention, detecting the actual temperature values ​​of the multiple sets of heat exchangers includes:

[0022] A first standard temperature change value of the heat exchanger is preset within a first unit time.

[0023] Detect the actual temperature value of the heat exchanger;

[0024] Based on the actual temperature value, the first actual temperature change value of the heat exchanger within the preset first unit time is obtained;

[0025] The first actual temperature change value is compared with the first standard temperature change value. If the first actual temperature change value is less than the first standard temperature change value, then the steam trap connected to the heat exchanger is faulty.

[0026] In a preferred embodiment of the present invention, detecting the actual temperature values ​​of the multiple sets of heat exchangers includes:

[0027] The time required for the heat exchanger to reach the second standard temperature change value is preset to be the second unit time;

[0028] The actual heating time required for the heat exchanger to reach the actual temperature value from the initial temperature value is detected, and the temperature change between the initial temperature value and the actual temperature value is equal to the second standard temperature change value.

[0029] The actual heating time is compared with the second unit time. If the actual heating time is less than the second unit time, the filter connected to the heat exchanger is clogged.

[0030] In a preferred embodiment of the present invention, the temperature difference threshold is greater than or equal to 30°C.

[0031] This invention provides a heat exchanger anti-dry-burning detection device for detecting whether any one of multiple heat exchangers is in a dry-burning state. The heat exchanger anti-dry-burning detection device includes:

[0032] The preset unit is used to preset the temperature difference threshold between the two sets of heat exchangers;

[0033] The detection unit is used to detect the actual temperature values ​​of multiple sets of the heat exchangers;

[0034] The comparison unit is used to obtain the actual temperature difference between any two sets of heat exchangers.

[0035] The processing unit is used to compare the actual temperature difference value with the temperature difference threshold. If the actual temperature difference value is greater than the temperature difference threshold, the heat exchanger is in a dry-burning state.

[0036] In a preferred embodiment of the present invention

[0037] The preset unit includes a first preset module, which is used to preset a first temperature difference threshold at the hot steam outlet of the two sets of heat exchangers.

[0038] The detection unit includes a first detection module, used to detect the first actual temperature value at the hot steam outlet of the heat exchanger when the acid solution is stopped being introduced into the heat exchanger.

[0039] In a preferred embodiment of the present invention, the first detection module is a first temperature sensor, which is disposed at the hot steam outlet or on a first pipe connected to the hot steam outlet.

[0040] In a preferred embodiment of the present invention

[0041] The preset unit includes a second preset module, which is used to preset a second temperature difference threshold at the acid outlet of the two sets of heat exchangers.

[0042] The detection unit includes a second detection module, used to detect the second actual temperature value at the acid outlet of the heat exchanger while acid is continuously being introduced into the heat exchanger.

[0043] In a preferred embodiment of the present invention, the second detection module is a second temperature sensor, which is disposed at the acid outlet or on a second pipe connected to the acid outlet.

[0044] In a preferred embodiment of the present invention, the heat exchanger anti-dry-burning detection device includes a controller, wherein the detection signal output terminal of the first temperature sensor and the detection signal output terminal of the second temperature sensor are respectively connected to the detection signal receiving terminal of the controller.

[0045] The present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described heat exchanger anti-dry-burning detection method.

[0046] The present invention provides a computer-readable storage medium storing a computer program that performs the above-described heat exchanger anti-dry-burning detection method.

[0047] As described above, the features and advantages of the heat exchanger anti-dry-burning detection method, device, equipment, and readable storage medium of the present invention are as follows: by comparing the preset temperature difference threshold of two sets of heat exchangers with the actual temperature difference value of any two sets of heat exchangers obtained by detection, the working state of the heat exchanger can be judged. If the actual temperature difference value is greater than the temperature difference threshold, the heat exchanger is in a dry-burning state; if the actual temperature difference value is less than or equal to the temperature difference threshold, the heat exchanger is in a normal working state. Thus, it is possible to quickly and accurately detect whether any set of heat exchangers is in a dry-burning state, promptly detect abnormal temperature states of the heat exchanger, and avoid damage to the heat exchanger due to dry burning. Attached Figure Description

[0048] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0049] in:

[0050] Figure 1 This is one of the flowcharts for the heat exchanger anti-dry-burning detection method of the present invention.

[0051] Figure 2 This is the second flowchart of the heat exchanger anti-dry-burning detection method of the present invention.

[0052] Figure 3 This is the third flowchart of the heat exchanger anti-dry-burning detection method of the present invention.

[0053] Figure 4 This is the fourth flowchart of the heat exchanger anti-dry-burning detection method of the present invention.

[0054] Figure 5 This is the fifth flowchart of the heat exchanger anti-dry-burning detection method of the present invention.

[0055] Figure 6 This is one of the structural block diagrams of the heat exchanger anti-dry-burning detection device of the present invention.

[0056] Figure 7 This is the second structural block diagram of the heat exchanger anti-dry-burning detection device of the present invention.

[0057] Figure 8 This is the third structural block diagram of the heat exchanger anti-dry-burning detection device of the present invention.

[0058] Figure 9 : A schematic diagram of the structure of the heat exchanger in the heat exchanger anti-dry-burning detection device of the present invention;

[0059] Figure 10 : A schematic diagram of controlling multiple heat exchangers in the heat exchanger anti-dry-burning detection device of the present invention.

[0060] Figure 11 : A schematic diagram of the pipeline connection of the heat exchanger anti-dry-burning detection device of the present invention.

[0061] The reference numerals in the accompanying drawings of this invention are:

[0062] 1. Heat exchanger; 11. Casing;

[0063] 12. Acid import; 13. Acid export;

[0064] 14. Hot steam inlet; 15. Hot steam outlet;

[0065] 16. Steam trap; 17. Acid pump;

[0066] 18. Filter; 19. Acid tank;

[0067] 2. Controller; 10. Preset unit;

[0068] 101. First preset module; 102. Second preset module;

[0069] 20. Detection unit; 201. First detection module;

[0070] 202. Second detection module; 30. Comparison unit;

[0071] 40. Processing Unit. Detailed Implementation

[0072] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0073] Implementation Method 1

[0074] This invention provides a method for detecting dry-burning prevention in heat exchangers. This method is used to detect if any one of multiple heat exchangers is in a dry-burning state. For example... Figure 9 As shown, the heat exchanger 1 includes a shell 11 (made of carbon steel), and multiple cylindrical graphite blocks are arranged inside the shell 11. The bottom of the shell 11 is provided with an acid inlet 12, and the top of the shell 11 is provided with an acid outlet 13. A mixed acid channel is formed between the multiple graphite blocks, and the two ends of the mixed acid channel are connected to the acid inlet 12 and the acid outlet 13, respectively. A hot steam inlet 14 is provided on the lower side wall of the shell 11, and a hot steam outlet 15 is provided on the upper side wall of the shell 11. Heat exchange pipes are arranged around the outer periphery of the multiple graphite blocks, and the two ends of the heat exchange pipes are connected to the hot steam inlet 14 and the hot steam outlet 15, respectively. When the acid solution is heated by heat exchange, hot steam is introduced into the heat exchange pipe through hot steam inlet 14. After the hot steam exchanges heat with the acid solution, it is discharged through hot steam outlet 15. When the graphite block is cooled, hot steam inlet 14 can also be used as cooling water inlet, and hot steam outlet 15 can also be used as cooling water outlet. Cooling water is injected into the heat exchange pipe through cooling water inlet. After the cooling water exchanges heat with the graphite block, it is discharged through cooling water outlet.

[0075] like Figure 10 As shown, in actual use, multiple heat exchanger groups are set up, and each heat exchanger group includes at least two heat exchangers, with one heat exchanger in each group serving as a backup.

[0076] like Figure 1 As shown, the method for detecting the dry-burning prevention of the heat exchanger includes:

[0077] Step S1: Preset the temperature difference threshold between the two sets of heat exchangers 1;

[0078] The temperature difference threshold is greater than or equal to 30℃. In actual use, when the temperature difference between the two sets of heat exchangers 1 is greater than 30℃, it can be determined that one set of heat exchangers 1 (i.e., the set with the higher temperature) is in a dry-burning state. Therefore, the threshold can be set to be greater than or equal to 30℃. Of course, this temperature threshold can also be set according to the actual operating conditions.

[0079] Step S2: Detect the actual temperature values ​​of multiple heat exchangers 1;

[0080] Step S3: Obtain the actual temperature difference between any two sets of heat exchangers 1;

[0081] Step S4: Compare the actual temperature difference value with the temperature difference threshold. If the actual temperature difference value is greater than the temperature difference threshold, then the heat exchanger 1 is in a dry-burning state.

[0082] Since the temperatures of multiple heat exchangers are not significantly different under normal operating conditions, the actual temperature values ​​can be obtained by comparing the real-time temperatures of different heat exchangers 1. The actual temperature values ​​are then compared with the preset temperature difference thresholds for the two heat exchangers 1. If the actual temperature difference is greater than the temperature difference threshold, it can be determined that the heat exchanger with the higher temperature among the two heat exchangers being compared is in a dry-burning state. If the actual temperature difference is less than or equal to the temperature difference threshold, it can be determined that both heat exchangers are in a normal state, i.e., the heat exchangers are not in a dry-burning state.

[0083] In an optional embodiment of the present invention, such as Figure 2 As shown, the temperature difference threshold in step S1 includes step S1': setting a first temperature difference threshold at the hot steam outlet 15 of the two sets of heat exchangers 1; wherein, the detection of the actual temperature value of the multiple sets of heat exchangers 1 in step S2 includes step S2': detecting the first actual temperature value at the hot steam outlet of the heat exchanger 1 when acid is stopped flowing into the heat exchanger 1 (i.e., the acid pump 17 on the pipeline for conveying acid stops working and no more acid enters the heat exchanger 1). Since no more acid enters the heat exchanger 1 at this time, the hot steam should also be stopped (i.e., the valve controlling the hot steam supply is completely closed). If the first actual temperature difference value is compared with the temperature difference threshold and it is found that the first actual temperature difference value is greater than the temperature difference threshold, then hot steam is still entering the heat exchanger 1 with a higher temperature, which indicates that the heat exchanger 1 with a higher temperature is in a dry-burning state.

[0084] Furthermore, in step S4, if the first actual temperature difference value is greater than the first temperature difference threshold, a first alarm signal can be sent through the controller 2 to ensure that the staff are promptly notified that the heat exchanger 1 is dry-burning, so that the staff can close the valves in time and cool down the graphite blocks inside the heat exchanger 1. The first alarm signal can be an audible and visual alarm, or it can be an alarm screen displayed on the HMI interface, or other alarm methods that can alert the staff.

[0085] In an optional embodiment of the present invention, such as Figure 3 As shown, the temperature difference threshold in step S1 also includes step S1”: setting a second temperature difference threshold at the acid outlet 13 on both sets of heat exchangers 1; wherein, the detection of the actual temperature value of multiple sets of heat exchangers 1 in step 2 includes step S2”: detecting the second actual temperature value at the acid outlet on the heat exchanger 1 while continuously supplying acid to the heat exchanger 1 (i.e., the acid pump 17 on the pipeline supplying acid is in the open state). Since the acid pump 17 is in the acid pumping state at this time, there should be a continuous flow of acid in and out of the mixed acid channel. Therefore, if the second actual temperature difference value is found to be greater than the temperature difference threshold after comparing it with the temperature difference threshold, the flow of acid in the heat exchanger 1 with a higher temperature is blocked and the mixed acid pipeline is blocked, thus indicating that the heat exchanger 1 with a higher temperature is in a dry-burning state.

[0086] Furthermore, in step S4, if the second actual temperature difference value is greater than the second temperature difference threshold, a second alarm signal can be sent through the controller 2. This ensures that the staff are promptly notified of the dry burning of the heat exchanger 1, so that they can promptly clear the mixed acid channel inside the heat exchanger 1 to ensure the smooth flow of acid and cool down the graphite blocks inside the heat exchanger 1. The second alarm signal can be an audible and visual alarm, or an alarm display screen on the HMI interface, or other alarm methods that can alert the staff. However, the alarm method of the second alarm signal needs to be different from that of the first alarm signal so that the staff can determine the fault type of the heat exchanger 1 by observing the different alarm methods, and then directly inspect the corresponding location of the heat exchanger 1.

[0087] In an optional embodiment of the present invention, such as Figure 4 As shown, step S2 further includes:

[0088] Step S201': Preset the first standard temperature change value of heat exchanger 1 within a first unit time; this first standard temperature change value is the temperature rise range of heat exchanger 1 within a first unit time under normal heat exchange conditions (acid pump 17 is operating normally, hot steam is being introduced normally, and condensate is being discharged normally). The first unit time can be set manually, and the first standard temperature change value can be obtained from the temperature change records of heat exchanger 1 within the first unit time during long-term use (the average value of the temperature change of heat exchanger 1 within the first unit time during long-term use can be taken).

[0089] Step S202': Detect the actual temperature value of heat exchanger 1;

[0090] Step S203': Based on the actual temperature value, obtain the first actual temperature change value of heat exchanger 1 within a preset first unit time (i.e., the temperature rise value of heat exchanger 1 from the start time to the end time of the first unit time).

[0091] Step S204': Compare the first actual temperature change value with the first standard temperature change value. If the first actual temperature change value is less than the first standard temperature change value, then the steam trap 16 connected to the heat exchanger 1 is faulty.

[0092] Specifically, in this embodiment, such as Figure 11 As shown, a steam pipe is connected to the hot steam inlet 14 of the heat exchanger 1, and a steam trap 16 is installed on the steam pipe. The steam trap 16 controls the opening and closing of the drain pipe, thereby draining the condensate in the heat exchanger 1. In actual operation, when the acid pump 17 is working normally, the heat exchanger 1 is in a heating state. The minimum temperature rise of the heat exchanger within 30 minutes can be preset to 15°C. If the temperature rise of the heat exchanger 1 is less than 15°C after 30 minutes of operation, it can be determined that the steam trap 16 on the drain pipe is faulty. The steam trap 16 cannot drain the condensate in the heat exchanger 1, which will block the steam pipe, preventing hot steam from entering the heat exchanger 1, and thus causing the heat exchanger 1 to fail to heat up as it normally would. In step S204', if the first actual temperature change value is less than the first standard temperature change value, a third alarm signal can be sent through the controller 2. This ensures that the staff are promptly informed of the steam trap 16 malfunction so that they can check and repair it in time. The third alarm signal can be an audible and visual alarm, or an alarm screen displayed on the HMI interface, or other alarm methods that can alert staff. However, the alarm method of the third alarm signal needs to be different from that of the first and second alarm signals so that staff can identify the type of fault by the different alarm methods.

[0093] In an optional embodiment of the present invention, such as Figure 5As shown, step S2 further includes:

[0094] Step S201”: The time required for heat exchanger 1 to reach the second standard temperature change value is preset as the second unit time; the second standard temperature change value is the temperature change value of heat exchanger 1 from the initial temperature value to a preset temperature value under normal heat exchange conditions (acid pump 17 is operating normally, hot steam is being introduced normally, and condensate is being discharged normally). Both the second standard temperature change value and the preset temperature value can be set manually, but the preset temperature value must be greater than the initial temperature value.

[0095] Step S202”: Detect the actual heating time required for heat exchanger 1 to reach the actual temperature value from the initial temperature value. The temperature change between the initial temperature value and the actual temperature value is equal to the second standard temperature change value.

[0096] Step S203”: Compare the actual heating time with the second unit time. If the actual heating time is less than the second unit time, the filter 18 connected to the heat exchanger 1 will be blocked.

[0097] Specifically, in this embodiment, such as Figure 11 As shown, the acid inlet 12 and acid outlet 13 of the heat exchanger 1 are connected by a pipeline. Along the pipeline from the acid inlet 12 to the acid outlet 13, an acid pump 17, a filter 18, and an acid tank 19 are sequentially installed. During actual operation, with the acid pump 17 operating normally, the heat exchanger 1 is in a heating state, which can be preset to reach a preset temperature value within 20 minutes or more. If the actual temperature of the heat exchanger 1 reaches or exceeds the preset temperature value within 20 minutes, it indicates that the filter 18 is clogged, resulting in insufficient acid being pumped into the heat exchanger 1. In this case, the heat exchanger 1 may also dry-burn. In step S203, if the actual heating time is less than the second unit time, a fourth alarm signal can be sent through the controller 2. This ensures that staff are promptly notified of a blockage in the filter 18 so that they can replace it in time. The fourth alarm signal can be an audible and visual alarm, an alarm display on the HMI interface, or other alarm methods that can alert staff. However, the alarm method of the fourth alarm signal must be different from that of the first, second, and third alarm signals so that staff can identify the fault type by the different alarm methods.

[0098] In this invention, based on different detection data (i.e., the first actual temperature difference value and the second actual temperature difference value), the type of fault that occurred in the heat exchanger 1 can be directly determined. If the first actual temperature difference value is greater than the first temperature difference threshold, the valve on the heat exchanger 1 that controls the hot steam supply state is completely closed; if the second actual temperature difference value is greater than the second temperature difference threshold, the mixed acid pipe inside the heat exchanger 1 is blocked.

[0099] Furthermore, the first temperature difference threshold and the second temperature difference threshold are set to the same or different temperature values ​​according to the actual working conditions.

[0100] The features and advantages of the heat exchanger anti-dry-burning detection method of the present invention are as follows:

[0101] This method for detecting dry-burning of heat exchangers compares the temperature difference thresholds of two preset heat exchanger sets 1 with the actual temperature difference values ​​of any two sets of heat exchanger sets 1 obtained through testing. This allows for the determination of the working status of the heat exchanger sets 1. If the actual temperature difference value is greater than the temperature difference threshold, the heat exchanger set 1 is in a dry-burning state; if the actual temperature difference value is less than or equal to the temperature difference threshold, the heat exchanger set 1 is in a normal working state. This method can quickly and accurately detect whether any set of heat exchanger sets 1 is in a dry-burning state, promptly identify abnormal temperature conditions of the heat exchanger sets 1, and prevent damage from dry-burning.

[0102] Implementation Method 2

[0103] like Figure 6 As shown, the present invention provides a heat exchanger anti-dry-burning detection device, which is used to detect whether any one of a plurality of heat exchangers 1 is in a dry-burning state. The heat exchanger anti-dry-burning detection device includes:

[0104] The preset unit 10 is used to preset the temperature difference threshold of the two heat exchangers 1; wherein the temperature difference threshold is greater than or equal to 30℃.

[0105] The detection unit 20 is used to detect the actual temperature values ​​of multiple heat exchangers 1;

[0106] Comparison unit 30 is used to obtain the actual temperature difference between any two sets of heat exchangers 1;

[0107] The processing unit 40 is used to compare the actual temperature difference value with the temperature difference threshold. If the actual temperature difference value is greater than the temperature difference threshold, the heat exchanger 1 is in a dry-burning state.

[0108] In an optional embodiment of the present invention, such as Figure 7As shown, the preset unit 10 includes a first preset module 101, which is used to preset a first temperature difference threshold at the hot steam outlet 15 on the two sets of heat exchangers 1; the detection unit 20 includes a first detection module 201, which is used to detect the first actual temperature value at the hot steam outlet 15 on the heat exchanger 1 when acid is stopped being introduced into the heat exchanger 1. Since no acid is entering the heat exchanger 1 at this time, the hot steam should also be stopped (i.e., the valve controlling the hot steam supply is completely closed). If the first actual temperature difference value is compared with the temperature difference threshold and it is found that the first actual temperature difference value is greater than the temperature difference threshold, then hot steam is still entering the heat exchanger 1 with a higher temperature, which indicates that the heat exchanger 1 with a higher temperature is in a dry-burning state.

[0109] Furthermore, the first detection module 201 may be, but is not limited to, a first temperature sensor, which is located at the hot steam outlet 15 or on a first pipe connected to the hot steam outlet 15.

[0110] In an optional embodiment of the present invention, such as Figure 8 As shown, the preset unit 10 also includes a second preset module 102, which is used to preset a second temperature difference threshold at the acid outlet 13 on the two sets of heat exchangers 1; the detection unit 20 includes a second detection module 202, which is used to detect the second actual temperature value at the acid outlet 13 on the heat exchanger 1 while acid is continuously being supplied into the heat exchanger 1. Since the acid pump 17 is in the acid pumping state at this time, there should be a continuous flow of acid in and out of the mixed acid channel. Therefore, if the second actual temperature difference value is found to be greater than the temperature difference threshold after comparing it with the temperature difference threshold, the flow of acid in the heat exchanger 1 with a higher temperature is blocked and the mixed acid pipeline is blocked, which indicates that the heat exchanger 1 with a higher temperature is in a dry-burning state.

[0111] Furthermore, the second detection module 202 may be, but is not limited to, a second temperature sensor, which is located at the acid outlet 13 or on a second pipe connected to the acid outlet 13.

[0112] In an optional embodiment of the present invention, such as Figure 10 As shown, the heat exchanger anti-dry-burning detection device also includes a controller 2. The detection signal output terminals of the first temperature sensor and the second temperature sensor are respectively connected to the detection signal receiving terminal of the controller 2. In actual operation, each heat exchanger 1 can be pre-numbered. Based on the corresponding number of the heat exchanger 1, the location and fault type of the heat exchanger 1 (valve not fully closed or mixed acid channel blocked) can be directly determined, thus facilitating timely inspection by the staff. The controller 2 can be, but is not limited to, a PLC controller.

[0113] The features and advantages of the heat exchanger anti-dry-burning detection device of the present invention are as follows:

[0114] This heat exchanger anti-dry-burning detection device compares the preset temperature difference thresholds of two sets of heat exchangers 1 with the actual temperature difference values ​​of any two sets of heat exchangers 1 obtained by detection. It can quickly and accurately detect whether any set of heat exchangers 1 is in a dry-burning state, promptly detect abnormal temperature states of heat exchangers 1, and prevent heat exchangers 1 from being damaged by dry burning.

[0115] Real-time method three

[0116] The present invention provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described heat exchanger anti-dry-burning detection method.

[0117] Specifically, the computer device can be a computer terminal, a server, or a similar computing device.

[0118] Implementation Method 4

[0119] The present invention provides a computer-readable storage medium storing a computer program that performs the above-described heat exchanger anti-dry-burning detection method.

[0120] Specifically, computer-readable storage media include both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer-readable storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable storage media does not include transient media, such as modulated data signals and carrier waves.

[0121] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0122] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0123] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0124] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0125] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A method for detecting dry-burning prevention of heat exchangers, used to detect if any one group of heat exchangers in a plurality of groups is in a dry-burning state, characterized in that, The heat exchanger anti-dry-burning detection method includes: A preset temperature difference threshold is established for the two sets of heat exchangers. The temperature difference threshold includes a first temperature difference threshold at the hot steam outlet of the two sets of heat exchangers and a second temperature difference threshold at the acid outlet of the two sets of heat exchangers. Detect the actual temperature values ​​of multiple sets of the aforementioned heat exchangers; The detection of the actual temperature values ​​of multiple sets of heat exchangers includes: With acid flow to the heat exchanger stopped, the first actual temperature value at the hot steam outlet of the heat exchanger is detected, and the difference between any two sets of the first actual temperature values ​​is recorded as the first actual temperature difference value; and... While continuously feeding acid into the heat exchanger, the second actual temperature value at the acid outlet of the heat exchanger is detected, and the difference between any two sets of the second actual temperature values ​​is recorded as the second actual temperature difference value. Obtain either the first actual temperature difference or the second actual temperature difference between any two sets of the heat exchangers; If the first actual temperature difference value is greater than the first temperature difference threshold, the heat exchanger is in a dry-burning state and sends a first alarm signal. If the second actual temperature difference value is greater than the second temperature difference threshold, the heat exchanger is in a dry-burning state and sends a second alarm signal.

2. The heat exchanger anti-dry-burning detection method as described in claim 1, characterized in that, The detection of the actual temperature values ​​of multiple sets of heat exchangers includes: A first standard temperature change value of the heat exchanger is preset within a first unit time. Detect the actual temperature value of the heat exchanger; Based on the actual temperature value, the first actual temperature change value of the heat exchanger within the preset first unit time is obtained; The first actual temperature change value is compared with the first standard temperature change value. If the first actual temperature change value is less than the first standard temperature change value, then the steam trap connected to the heat exchanger is faulty.

3. The heat exchanger anti-dry-burning detection method as described in claim 1, characterized in that, The detection of the actual temperature values ​​of multiple sets of heat exchangers includes: The time required for the heat exchanger to reach the second standard temperature change value is preset to be the second unit time; The actual heating time required for the heat exchanger to reach the actual temperature value from the initial temperature value is detected, and the temperature change between the initial temperature value and the actual temperature value is equal to the second standard temperature change value. The actual heating time is compared with the second unit time. If the actual heating time is less than the second unit time, the filter connected to the heat exchanger is clogged.

4. The heat exchanger anti-dry-burning detection method as described in claim 1, characterized in that, The temperature difference threshold is greater than or equal to 30°C.

5. A heat exchanger anti-dry-burning detection device, which uses the heat exchanger anti-dry-burning detection method according to any one of claims 1 to 4 to detect whether any one of a plurality of heat exchangers is in a dry-burning state, characterized in that, The heat exchanger anti-dry-burning detection device includes: The preset unit is used to preset the temperature difference threshold between the two sets of heat exchangers; The preset unit includes a first preset module and a second preset module. The first preset module is used to preset a first temperature difference threshold at the hot steam outlet of the two sets of heat exchangers. The second preset module is used to preset a second temperature difference threshold at the acid outlet of the two sets of heat exchangers. The detection unit is used to detect the actual temperature values ​​of multiple sets of the heat exchangers; The detection unit includes a first detection module and a second detection module. The first detection module is used to detect a first actual temperature value at the hot steam outlet of the heat exchanger when acid is stopped flowing into the heat exchanger, and the difference between any two sets of the first actual temperature values ​​is recorded as the first actual temperature difference value. The second detection module is used to detect a second actual temperature value at the acid outlet of the heat exchanger when acid is continuously flowing into the heat exchanger, and the difference between any two sets of the second actual temperature values ​​is recorded as the second actual temperature difference value. The comparison unit is used to obtain a first actual temperature difference or a second actual temperature difference between any two sets of heat exchangers. The processing unit is configured to compare the first or second actual temperature difference value with the corresponding first or second temperature difference threshold. If the first actual temperature difference value is greater than the first temperature difference threshold, the heat exchanger is in a dry-burning state and a first alarm signal is sent. If the second actual temperature difference value is greater than the second temperature difference threshold, the heat exchanger is in a dry-burning state and a second alarm signal is sent.

6. The heat exchanger anti-dry-burning detection device as described in claim 5, characterized in that, The first detection module is a first temperature sensor, which is located at the hot steam outlet or on a first pipe connected to the hot steam outlet.

7. The heat exchanger anti-dry-burning detection device as described in claim 6, characterized in that, The second detection module is a second temperature sensor, which is located at the acid outlet or on a second pipe connected to the acid outlet.

8. The heat exchanger anti-dry-burning detection device as described in claim 7, characterized in that, The heat exchanger anti-dry-burning detection device includes a controller, and the detection signal output terminals of the first temperature sensor and the second temperature sensor are respectively connected to the detection signal receiving terminal of the controller.

9. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the heat exchanger anti-dry-burning detection method according to any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that performs the heat exchanger anti-dry-burning detection method according to any one of claims 1 to 4.

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