Desulfurization analysis system leak detection method and desulfurization analysis system

Abstract

The present invention belongs to the field of desulfurization technology, and discloses a desulfurization analysis system leak detection method and a desulfurization analysis system. The desulfurization analysis system leak detection method includes: first, obtaining the gas pressure value in the steam reboiler; then, judging whether the gas pressure value is less than the standard preset value; if the gas pressure value is less than the standard preset value, it can be judged that there is a gas leak in the steam reboiler. The liquid inlet and liquid outlet of the steam reboiler are closed to carry out subsequent processes such as detecting the exact location of the leak point. The desulfurization analysis system leak detection method can use existing instruments and operating conditions to perform online leak detection on the desulfurization analysis system without affecting the normal operation of the equipment. It can not only quickly detect the leaking equipment, but also the method is simple, easy to operate, time-saving and labor-saving, safe and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of desulfurization, and in particular to a desulfurization analysis system leakage detection method and a desulfurization analysis system. Background Art

[0002] In the production of coke oven gas, the generated coke oven gas will contain other impurities, such as sulfur-containing acidic gas. Therefore, the coke oven gas must be desulfurized and purified before it can be supplied to subsequent processes.

[0003] Currently, coke oven gas desulfurization generally requires an ammonium sulfate process, final cooling, benzene washing, water washing, and desulfurization processes before use. After the benzene washing process, the gas passes through the water washing tower, where most of the oil impurities in the gas are washed away. The gas then enters the desulfurization process. In the desulfurization tower, the circulating desulfurization liquid absorbs sulfuric acid gases (such as hydrogen sulfide) to become a circulating desulfurization rich liquid. The circulating desulfurization rich liquid then separates sulfuric acid gases in the desorption tower, becoming a circulating desulfurization lean liquid. The circulating desulfurization lean liquid is then returned to the desulfurization process for use. The sulfuric acid gases separated in the desorption tower are then processed through an acid gas condenser, acid gas cooler, and acid gas separator to achieve vapor-liquid separation. The coolant is collected in an underground tank, while the remaining acid gas enters the acid production process for further processing.

[0004] In existing coal gas purification systems, the desulfurization and desorption system uses heat provided by steam and hot water reboilers to heat the circulating desulfurization rich liquid from the desulfurization tower, desorbing hydrogen sulfide from the circulating desulfurization rich liquid under negative pressure. However, during operation, the desorption system's steam reboiler, hot water reboiler, acid gas condenser, or acid gas cooler can leak due to equipment quality or corrosion during operation. This can cause steam condensate from the steam reboiler, hot water from the hot water reboiler, circulating water from the acid gas condenser, or low-temperature water from the acid gas cooler to enter the desorption system, reducing desorption efficiency and impacting normal system operations.

[0005] The main leak detection method in the prior art is to first shut down the degassing tower, deactivating the entire degassing system. Next, the steam reboiler is checked for leaks: the inlet and outlet valves of the steam reboiler are closed, blind plates are sealed at the inlet and outlet pipes, nitrogen is introduced through the vent pipe at the inlet pipe, and after pressurizing to a certain pressure, the nitrogen supply is turned off. The pressure gauge on the steam reboiler is observed for changes in readings. If the pressure gauge reading continues to drop, it indicates a leak. Finally, the above leak detection method is repeated for the steam reboiler, and the hot water reboiler, acid gas condenser, and acid gas cooler are checked for leaks in sequence. However, this method requires shutting down the degassing tower and checking each of the steam reboiler, hot water reboiler, acid gas condenser, and acid gas cooler for leaks. This process is time-consuming, detrimental to the stable operation of the entire gas purification system, and results in significant economic losses. Furthermore, due to the large size of each piece of equipment to be checked for leaks, the corresponding inlet and outlet pipes are also relatively large, and most of the work is done at height. When workers are performing blind plate operations, they need to set up a large number of grilles and use cranes to complete the work. The cost of leak testing is greatly increased, and there is a risk of falling and getting injured when working at heights. Summary of the Invention

[0006] An object of the present invention is to provide a desulfurization analysis system leak detection method, which can screen the desulfurization analysis system for leakage online without affecting the normal operation of the equipment, is simple to operate, saves time and effort, and is safe and efficient.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A desulfurization and analysis system leak detection method is used to detect leaks in the desulfurization and analysis system when a leak occurs. The desulfurization and analysis system includes a desulfurization tower, a steam reboiler, a hot water reboiler, an acid gas condenser, and an acid gas cooler. The steam reboiler and the hot water reboiler are respectively arranged at the bottom end of the outer side of the desulfurization tower and are respectively connected to the desulfurization tower through pipelines. The hot water tank is connected to the hot water reboiler through a hot water pump. The outlet of the hot water pump is also connected to user water. The top of the desulfurization tower is connected to the acid gas condenser and the acid gas cooler in sequence. The acid gas cooler is also connected to a vacuum condensate tank, and the vacuum condensate tank is connected to a rich liquid tank. The desulfurization and analysis system leak detection method includes:

[0009] Obtaining a gas pressure value in the steam reboiler;

[0010] Determining whether the gas pressure value is less than a standard preset value;

[0011] If the gas pressure value is less than the standard preset value, the gas in the steam reboiler is leaking, and the liquid inlet and liquid outlet of the steam reboiler are closed.

[0012] Optionally, the steam reboiler is connected to a gas pressure detection device, the gas pressure detection device includes a negative pressure gauge, and the standard preset value is 0 MPa.

[0013] Optionally, the measuring range of the negative pressure gauge is -0.1MPa to 0MPa.

[0014] Optionally, the method further includes the following steps:

[0015] Disconnecting the hot water pump from the user's water supply;

[0016] Stopping water replenishment into the hot water tank and recording the reference liquid level of the liquid in the hot water tank;

[0017] At preset time intervals, recording the actual liquid level of the liquid in the hot water tank;

[0018] The reference liquid level and the actual liquid level are compared to determine whether the hot water reboiler is leaking.

[0019] Optionally, comparing the reference liquid level with the actual liquid level to determine whether the hot water reboiler is leaking specifically includes:

[0020] If the reference liquid level is higher than the actual liquid level, the hot water reboiler is leaking, and the liquid inlet and the liquid outlet of the hot water reboiler are closed;

[0021] If the reference liquid level is equal to the actual liquid level, the actual liquid level of the liquid in the hot water tank is recorded at preset intervals, and the reference liquid level is compared with the actual liquid level and judged.

[0022] Optionally, the method further includes the following steps:

[0023] maintaining the liquid in the vacuum condensate tank at a preset liquid level, and recording a standard flow rate value of the vacuum condensate tank flowing to the rich liquid tank;

[0024] closing the low-temperature water inlet and outlet in the acid gas cooler, maintaining the liquid in the vacuum condensate tank at the preset level at intervals, and recording the actual flow rate of the vacuum condensate tank to the rich liquid tank;

[0025] The standard flow value is compared with the actual flow value to determine whether the acid gas cooler is leaking.

[0026] Optionally, comparing the standard flow value with the actual flow value to determine whether the acid gas cooler is leaking specifically includes:

[0027] If the standard flow rate value is greater than the actual flow rate value, the acid gas cooler is leaking, and the liquid inlet and liquid outlet of the acid gas cooler are closed;

[0028] If the standard flow value is equal to the actual flow value, the actual flow value of the vacuum condensate tank flowing to the rich liquid tank is recorded at preset intervals, and the standard flow value is compared and judged with the actual flow value.

[0029] Optionally, the preset liquid level of the liquid in the vacuum condensate tank is 800 mm.

[0030] Optionally, the method further includes the following steps:

[0031] Obtaining a gas pressure value in the acid gas condenser;

[0032] Determining whether the gas pressure value is less than a standard preset value;

[0033] If the gas pressure value is less than the standard preset value, the gas in the acid gas condenser is leaking, and the liquid inlet and the liquid outlet of the acid gas condenser are closed.

[0034] Another object of the present invention is to provide a desulfurization analysis system that can quickly locate leakage points when the equipment is operating normally, is simple to operate, saves time and effort, and is safe and efficient.

[0035] To achieve this object, the present invention adopts the following technical solutions:

[0036] A desulfurization analysis system is provided, wherein the desulfurization analysis system is leak-checked using the above-mentioned desulfurization analysis system leak-checking method. The desulfurization analysis system comprises:

[0037] Desorption tower, used to separate the solvent in the mixed oil;

[0038] a steam reboiler and a hot water reboiler, the steam reboiler and the hot water reboiler being respectively arranged at the bottom end of the outer side of the desorption tower and being connected to the desorption tower through pipelines, for vaporizing the liquid at the bottom of the desorption tower and transporting it back to the interior of the desorption tower;

[0039] a hot water tank, connected to the hot water reboiler via a hot water pump, the outlet of the hot water pump also being connected to user water;

[0040] an acid gas condenser, connected to the top of the analytical tower, for condensing the gas in the analytical tower;

[0041] The top of the acid gas cooler is connected to the acid gas condenser and the acid gas cooler in sequence. The acid gas cooler is also connected to a vacuum condensate tank, and the vacuum condensate tank is connected to the rich liquid tank through a vacuum condensate pump.

[0042] Beneficial effects of the present invention:

[0043] The desulfurization analysis system leak detection method provided by the present invention is used to detect leaks in the desulfurization analysis system when a leak occurs. First, the gas pressure value in the steam reboiler is obtained; then, it is determined whether the gas pressure value is less than the standard preset value; if the gas pressure value is less than the standard preset value, it can be determined that there is a gas leak in the steam reboiler. The liquid inlet and outlet of the steam reboiler are closed to perform subsequent steps such as detecting the exact location of the leak point. The desulfurization analysis system leak detection method can perform online leak detection on the desulfurization analysis system without affecting the normal operation of the equipment, using existing instruments and operating conditions. It can not only quickly detect the leaking equipment, but also the method is simple, easy to operate, time-saving and labor-saving, safe and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0045] Figure 1 Schematic diagram of the structure of the desulfurization analysis system provided by an embodiment of the present invention;

[0046] Figure 2 This is a flow chart of steam reboiler leak detection in a desulfurization analysis system leak detection method provided by an embodiment of the present invention;

[0047] Figure 3 This is a flow chart of leak detection of a hot water reboiler in a leak detection method of a desulfurization analysis system provided by an embodiment of the present invention;

[0048] Figure 4 This is a flow chart of leak detection of an acid gas cooler in a leak detection method of a desulfurization analysis system provided by an embodiment of the present invention;

[0049] Figure 5 The present invention provides a flowchart of leak detection for an acid gas condenser in a leak detection method for a desulfurization and analysis system.

[0050] In the picture:

[0051] 1. Decomposition tower; 2. Steam reboiler; 21. Gas pressure detection device; 22. Inlet valve; 23. Outlet valve; 3. Hot water reboiler; 4. Hot water tank; 5. Hot water pump; 6. Acid gas condenser; 7. Acid gas cooler; 8. Vacuum condensate tank; 9. Vacuum condensate pump; 10. Liquid flow detection device. DETAILED DESCRIPTION

[0052] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0055] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0056] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0057] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0058] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0059] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0060] This embodiment provides a desulfurization analysis system leak detection method and a desulfurization analysis system, wherein the desulfurization analysis system leak detection method is used to detect leaks in the desulfurization analysis system when the system leaks. Specifically, Figure 1 As shown, the desulfurization and desorption system provided in this embodiment includes a desorption tower 1, a steam reboiler 2, a hot water reboiler 3, a hot water tank 4, an acid gas condenser 6 and an acid gas cooler 7.

[0061] The desorption tower 1 is used to separate the solvent from the mixed oil. A steam reboiler 2 and a hot water reboiler 3 are located at the outer bottom end of the desorption tower 1 and connected to the tower 1 via pipelines. They vaporize the liquid at the bottom of the desorption tower 1 and transport it back to the tower 1. A hot water tank 4 is connected to the hot water reboiler 3 via a hot water pump 5, the outlet of which is also connected to user water. An acid gas condenser 6 is connected to the top of the desorption tower 1 to condense the gas within the desorption tower 1. The top of the desorption tower 1 is connected to the acid gas condenser 6 and the acid gas cooler 7, respectively. The acid gas cooler 7 is also connected to a vacuum condensate tank 8, which is connected to a rich liquid tank via a vacuum condensate pump 9. In other words, the sulfuric acid gas precipitated in the desorption tower 1 is processed by the acid gas condenser 6 and the acid gas cooler 7 to achieve vapor-liquid separation. The coolant is collected in the vacuum condensate tank 8, while the remaining acid gas enters the acid production process for further processing.

[0062] This embodiment also provides a desulfurization analysis system leak detection method, such as Figure 2 As shown, the method includes the following steps:

[0063] Obtain the gas pressure value in the steam reboiler 2;

[0064] Determine whether the gas pressure value is less than the standard preset value;

[0065] If the gas pressure value is less than the standard preset value, the gas in the steam reboiler 2 is leaking, and the liquid inlet and liquid outlet of the steam reboiler 2 are closed.

[0066] Optionally, the steam reboiler 2 is connected to a gas pressure detection device 21, which includes a negative pressure gauge with a standard preset value of 0 MPa. Furthermore, the negative pressure gauge has a range of -0.1 MPa to 0 MPa. It is understood that if a leak occurs in the steam reboiler 2, the gas pressure detected by the gas pressure detection device 21 will gradually decrease. When the reading of the gas pressure detection device 21 is a negative pressure, it can be determined that a leak occurs in the steam reboiler 2. Close the inlet valve 22 and outlet valve 23 of the steam reboiler 2 to proceed with subsequent processes such as detecting the exact location of the leak point.

[0067] Alternatively, as Figure 3 As shown, the desulfurization analysis system leak detection method also includes the following steps:

[0068] Disconnect the hot water pump 5 from the user's water supply;

[0069] Stop adding water to the hot water tank 4 and record the reference liquid level of the liquid in the hot water tank 4;

[0070] At preset time intervals, record the actual liquid level in the hot water tank 4;

[0071] Compare the reference liquid level with the actual liquid level to determine whether the hot water reboiler 3 is leaking.

[0072] Furthermore, comparing the reference liquid level with the actual liquid level to determine whether the hot water reboiler 3 is leaking specifically includes the following steps:

[0073] If the reference liquid level is higher than the actual liquid level, the hot water reboiler 3 is leaking, and the liquid inlet and outlet of the hot water reboiler 3 are closed;

[0074] If the reference liquid level is equal to the actual liquid level, the actual liquid level of the liquid in the hot water tank 4 is recorded at intervals of a preset time, and the reference liquid level is compared with the actual liquid level and judged.

[0075] Specifically, the one-way valve on the outlet pipe of hot water pump 5, which connects to the user's water supply, is closed to disconnect the hot water pump 5 from the user's water supply. At this point, the water supply to the hot water tank 4 is shut off, and the hot water tank 4 is connected to the hot water reboiler 3 only through the hot water pump 5. If the liquid level L in the hot water tank 4 continues to drop, it indicates that the hot water reboiler 3 is leaking.

[0076] Alternatively, as Figure 4 As shown, the desulfurization analysis system leak detection method also includes the following steps:

[0077] Keep the liquid in the vacuum condensate tank 8 at a preset level and record the standard flow rate of the vacuum condensate tank 8 to the rich liquid tank;

[0078] Close the low-temperature water inlet and outlet in the acid gas cooler 7, and keep the liquid in the vacuum condensate tank 8 at a preset level at intervals, and record the actual flow rate from the vacuum condensate tank 8 to the rich liquid tank;

[0079] Compare the standard flow value with the actual flow value to determine whether the acid gas cooler 7 is leaking.

[0080] Furthermore, the standard flow value is compared with the actual flow value to determine whether the acid gas cooler 7 is leaking, which specifically includes the following steps:

[0081] If the standard flow rate value is greater than the actual flow rate value, the acid gas cooler 7 is leaking, and the liquid inlet and outlet of the acid gas cooler 7 are closed;

[0082] If the standard flow rate value is equal to the actual flow rate value, the actual flow rate value of the vacuum condensate tank 8 flowing to the rich liquid tank is recorded at preset intervals, and the standard flow rate value and the actual flow rate value are compared and judged.

[0083] Specifically, a liquid flow detection device 10 is connected to the outlet pipe of the vacuum condensate pump 9 to detect the flow rate of the liquid flowing through the pipe. Exemplarily, the liquid flow detection device 10 can be a flow meter. In this embodiment, before leak testing the acid gas cooler 7, the circulating water volume in the acid gas condenser 6 is increased to ensure effective acid gas cooling. Then, the liquid level in the vacuum condensate tank 8 is stabilized at a preset level. In this embodiment, the preset level of the liquid in the vacuum condensate tank 8 is 800 mm. The standard flow rate from the vacuum condensate tank 8 to the rich liquid tank is recorded. Next, the low-temperature water inlet and outlet in the acid gas cooler 7 are closed. After a preset time interval, the liquid level in the vacuum condensate tank 8 is maintained at the preset level. The actual flow rate from the vacuum condensate tank 8 to the rich liquid tank is recorded. It is understood that if the actual flow rate is less than the standard flow rate, it indicates that leakage has occurred before the liquid enters the vacuum condensate tank 8, indicating that there is a leak in the acid gas cooler 7.

[0084] Alternatively, as Figure 5 As shown, the desulfurization analysis system leak detection method also includes the following steps:

[0085] Obtaining the gas pressure value in the acid gas condenser 6;

[0086] Determine whether the gas pressure value is less than the standard preset value;

[0087] If the gas pressure value is less than the standard preset value, the gas in the acid gas condenser 6 is leaking, and the liquid inlet and outlet of the acid gas condenser 6 are closed. The leak testing principle of the acid gas condenser 6 is the same as that of the steam reboiler 2, and will not be repeated in this embodiment.

[0088] The desulfurization analysis system leak detection method provided in this embodiment can perform online leak detection on the desulfurization analysis system by utilizing existing instruments and operating conditions without affecting the normal operation of the equipment. It can not only quickly detect the leaking equipment, but also the method is simple, easy to operate, saves time and effort, and is safe and efficient.

[0089] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A method for detecting leaks in a desulfurization analysis system, for detecting leaks in a desulfurization analysis system, wherein the desulfurization analysis system comprises a analysis tower (1), a steam reboiler (2), a hot water reboiler (3), an acid gas condenser (6) and an acid gas cooler (7), wherein the steam reboiler (2) and the hot water reboiler (3) are respectively arranged at the bottom end of the outer side of the analysis tower (1) and are respectively connected to the analysis tower (1) through pipelines, and are used to vaporize the liquid at the bottom of the analysis tower (1) and transport it back to the interior of the analysis tower (1), a hot water tank (4) is connected to the hot water reboiler (3) through a hot water pump (5), and the outlet of the hot water pump (5) is also connected to user water, the top of the analysis tower (1) is connected to the acid gas condenser (6) and the acid gas cooler (7) in sequence, the acid gas cooler (7) is also connected to a vacuum condensate tank (8), and the vacuum condensate tank (8) is connected to a rich liquid tank; characterized in that The desulfurization analysis system leak detection method includes: Obtaining a gas pressure value in the steam reboiler (2); Determining whether the gas pressure value is less than a standard preset value; If the gas pressure value is less than the standard preset value, the gas in the steam reboiler (2) leaks, and the liquid inlet and the liquid outlet of the steam reboiler (2) are closed; The following steps are also included: maintaining the liquid in the vacuum condensate tank (8) at a preset liquid level, and recording a standard flow rate value of the vacuum condensate tank (8) flowing to the rich liquid tank; The inlet and outlet of the low-temperature water in the acid gas cooler (7) are closed, and the liquid in the vacuum condensate tank (8) is kept at the preset liquid level at intervals of a preset time, and the actual flow rate of the vacuum condensate tank (8) to the rich liquid tank is recorded; The standard flow value is compared with the actual flow value to determine whether the acid gas cooler (7) is leaking.

2. The desulfurization analysis system leak detection method according to claim 1, characterized in that: The steam reboiler (2) is connected to a gas pressure detection device (21), the gas pressure detection device (21) comprises a negative pressure gauge, and the standard preset value is 0 MPa.

3. The desulfurization analysis system leak detection method according to claim 2, characterized in that: The measuring range of the negative pressure gauge is -0.1MPa to 0MPa.

4. The desulfurization analysis system leak detection method according to claim 1, characterized in that: The following steps are also included: Disconnecting the hot water pump (5) from the user's water supply; Stopping the replenishment of water into the hot water tank (4) and recording the reference liquid level of the liquid in the hot water tank (4); At preset time intervals, recording the actual liquid level in the hot water tank (4); The reference liquid level and the actual liquid level are compared to determine whether the hot water reboiler (3) is leaking.

5. The desulfurization analysis system leak detection method according to claim 4, characterized in that: Comparing the reference liquid level with the actual liquid level to determine whether the hot water reboiler (3) is leaking specifically includes: If the reference liquid level is higher than the actual liquid level, the hot water reboiler (3) is leaking, and the liquid inlet and the liquid outlet of the hot water reboiler (3) are closed; If the reference liquid level is equal to the actual liquid level, the actual liquid level of the liquid in the hot water tank (4) is recorded at intervals of a preset time, and the reference liquid level is compared with the actual liquid level and judged.

6. The desulfurization analysis system leak detection method according to claim 5, characterized in that: Comparing the standard flow value with the actual flow value to determine whether the acid gas cooler (7) is leaking specifically includes: If the standard flow rate value is greater than the actual flow rate value, the acid gas cooler (7) is leaking, and the liquid inlet and the liquid outlet of the acid gas cooler (7) are closed; If the standard flow value is equal to the actual flow value, the actual flow value of the vacuum condensate tank (8) flowing to the rich liquid tank is recorded at intervals of a preset time, and the standard flow value is compared and judged with the actual flow value.

7. The desulfurization analysis system leak detection method according to claim 5, characterized in that: The preset liquid level of the liquid in the vacuum condensate tank (8) is 800 mm.

8. The desulfurization analysis system leak detection method according to claim 1, characterized in that: The following steps are also included: Obtaining the gas pressure value in the acid gas condenser (6); Determining whether the gas pressure value is less than a standard preset value; If the gas pressure value is less than the standard preset value, the gas in the acid gas condenser (6) leaks, and the liquid inlet and the liquid outlet of the acid gas condenser (6) are closed.

9. A desulfurization analysis system, characterized in that: Leak detection is performed using the desulfurization analysis system leak detection method according to any one of claims 1 to 8, wherein the desulfurization analysis system comprises: A desorption tower (1) is used to separate the solvent in the mixed oil; a steam reboiler (2) and a hot water reboiler (3), the steam reboiler (2) and the hot water reboiler (3) being respectively arranged at the bottom end of the outer side of the analytical tower (1) and being respectively connected to the analytical tower (1) through pipelines, and being used for vaporizing the liquid at the bottom of the analytical tower (1) and transporting it back to the interior of the analytical tower (1); A hot water tank (4) is connected to the hot water reboiler (3) via a hot water pump (5), and the outlet of the hot water pump (5) is also connected to user water; an acid gas condenser (6), which is in communication with the top of the analytical tower (1) and is used to condense the gas in the analytical tower (1); The top of the analytical tower (1) is connected to the acid gas condenser (6) and the acid gas cooler (7) in sequence. The acid gas cooler (7) is also connected to a vacuum condensate tank (8). The vacuum condensate tank (8) is connected to a rich liquid tank via a vacuum condensate pump (9).

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