Gasification furnace airtight leakage detection energy-saving system and method

Abstract

The invention provides a gasification furnace airtight leakage detection energy-saving system and method.The gasification furnace airtight leakage detection energy-saving system comprises a pressurization assembly and a detection assembly, the pressurization assembly comprises a pressurization part and a pressurization conveying pipeline, the pressurization part is connected with the first end of the pressurization conveying pipeline, and the second end of the pressurization conveying pipeline is connected with a medium-pressure nitrogen pipe network; the connection position of the pressurization conveying pipeline and the medium-pressure nitrogen pipe network is located on the upstream of the gasification furnace, the pressurization part is used for pressurizing air introduced into the pressurization part and introducing the pressurized air into the gasification furnace, the detection assembly comprises a detection part and a detection pipeline, the detection part is arranged on the detection pipeline, the first end of the detection pipeline is connected with the pressurization conveying pipeline, and the second end of the detection pipeline is connected with the medium-pressure nitrogen pipe network. The detection pipeline is located at the downstream of the pressurizing part, and the detection part is used for detecting parameters of gas introduced into the detection pipeline. According to the airtight leakage detection energy-saving system for the gasification furnace, the consumption of liquid nitrogen can be greatly reduced, so that the cost is reduced, and the resource waste is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gasifier equipment detection, and specifically, to a gasifier airtight leak detection and energy-saving system and method. Background Art

[0002] Before starting up or preparing the gasifier, it is necessary to conduct airtight leak detection on the gasifier to ensure that there is no leakage after the gasifier is fed with materials and ensure its safe and stable operation. In related technologies, nitrogen is generally selected for airtight leak detection of the gasifier. Liquid nitrogen is pressurized by a medium-pressure nitrogen pump of an air separation unit, and then after heat exchange by a water bath vaporizer, medium-pressure nitrogen is sent into the gasifier for an airtight test. When a single gasifier is conducting airtight leak detection and leak elimination work, it generally takes 8 - 15 hours and consumes a large amount of liquid nitrogen; during the actual operation process, when the medium-pressure nitrogen pump continuously sends out nitrogen to cooperate with the gasifier for airtightness, the liquid level of the liquid nitrogen storage tank drops significantly, and the output of liquid nitrogen cannot be proportional to the consumption of the medium-pressure nitrogen pump. Generally, at least 50 tons of liquid nitrogen are consumed. When the liquid level of the liquid nitrogen storage tank drops below 7 meters, the medium-pressure nitrogen pump is prone to cavitation and insufficient flow due to insufficient suction pressure, which will delay the airtight leak detection work of the gasifier and affect the start-up progress of the overall chemical plant. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related technologies to some extent.

[0004] To this end, an embodiment of the present invention provides a gasifier airtight leak detection and energy-saving system and method. The gasifier airtight leak detection and energy-saving system can greatly reduce the consumption of liquid nitrogen, thereby reducing costs and wasting resources.

[0005] The gasifier airtight leak detection and energy-saving system according to an embodiment of the present invention includes:

[0006] A pressurization assembly, the pressurization assembly includes a pressurizing member and a pressurized conveying pipeline. The pressurizing member is connected to the first end of the pressurized conveying pipeline, the second end of the pressurized conveying pipeline is connected to a medium-pressure nitrogen pipe network, and the connection between the pressurized conveying pipeline and the medium-pressure nitrogen pipe network is located upstream of the gasifier. The pressurizing member is used to pressurize the air introduced into the pressurizing member and introduce the pressurized air into the gasifier;

[0007] A detection assembly, the detection assembly includes a detection member and a detection pipeline. The detection member is arranged on the detection pipeline. The first end of the detection pipeline is connected to the pressurized conveying pipeline, and the detection pipeline is located downstream of the pressurizing member. The detection member is used to detect the gas parameters of the gas introduced into the detection pipeline.

[0008] The airtight leak detection and energy-saving system of the gasifier in the embodiment of the present invention uses air as the pressurizing medium to replace liquid nitrogen, greatly reducing the consumption of liquid nitrogen, lowering the production cost and reducing the waste of resources. The pressurizing component can quickly provide the required pressure for the gasifier, shorten the time required for airtight leak detection, and improve the startup efficiency of the overall chemical plant. In addition, the detection component in the system can monitor the gas parameters in real time to ensure the pressure stability of the gasifier during the airtight test and improve the safety of the operation.

[0009] In some embodiments, the pressurizing member includes a plurality of compression components, and the plurality of compression components are arranged in sequence along the gas flow direction.

[0010] In some embodiments, the airtight leak detection and energy-saving system of the gasifier in the embodiment of the present invention further includes a control component, and the control component includes a flange gate valve, and the flange gate valve is connected to the second end of the pressurized delivery pipeline.

[0011] In some embodiments, the control component further includes a blind plate, the blind plate is connected to the flange gate valve, and the working state of the blind plate is consistent with the working state of the flange gate valve.

[0012] In some embodiments, the airtight leak detection and energy-saving system of the gasifier in the embodiment of the present invention further includes a replacement detection component, the replacement detection component is connected to the medium-pressure nitrogen pipeline network and is located upstream of the gasifier, the replacement detection component is electrically connected to the medium-pressure nitrogen pump on the medium-pressure nitrogen pipeline network, the replacement detection component is used to detect the oxygen content in the medium-pressure nitrogen pipeline network, and if the oxygen content in the medium-pressure nitrogen pipeline network is less than a preset value, the replacement detection component sends a control signal for normal use to the medium-pressure nitrogen pump on the medium-pressure nitrogen pipeline network.

[0013] The airtight leak detection and energy-saving method of the gasifier in the embodiment of the present invention is completed by using the airtight leak detection and energy-saving system as described in any one of the above embodiments, and includes the following steps:

[0014] S1. Pressurize the air by using the pressurizing component;

[0015] S2. Detect the gas parameters of the pressurized air by using the detection component;

[0016] S3. Connect the pressurized delivery pipeline to the gasifier and introduce the gas meeting the requirements of the airtight leak detection of the gasifier into the gasifier;

[0017] S4. After the leak detection is completed, disconnect the pressurized delivery pipeline from the gasifier, start the medium-pressure nitrogen pump, and then replace the pipeline with nitrogen;

[0018] S5. Resume the use of the medium-pressure nitrogen pipeline network until the oxygen content in the medium-pressure nitrogen pipeline network is less than 10 ppm.

[0019] In some embodiments, the gas parameters include detecting the air dew point temperature, oil content, and air pressure of the pressurizing component, where the air dew point temperature is less than or equal to -63.5 °C, the oil content is less than 0.001 mg / dm3, and the air pressure is greater than 6.7 MPa and less than 6.9 MPa.

[0020] In some embodiments, the nitrogen replacement process includes opening the high-point vent valve and sampling valve of the pipeline, maintaining the replacement flow rate not less than 5 m / s, and the replacement time not less than 30 minutes.

[0021] In some embodiments, during the airtight leak detection, it is necessary to monitor the pressure fluctuation of the medium-pressure nitrogen pipeline network in real time, and control the pressure fluctuation range not exceeding ±0.2 MPa.

[0022] In some embodiments, in step S4, the following steps are further included: disconnecting the pressurized transmission pipeline from the gasifier using a blind plate changeover, and before performing the energy isolation procedure, confirming that the pressure of the medium-pressure nitrogen pipeline network drops below 0.5 MPa. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the airtight leak detection and energy-saving system of the gasifier according to the embodiment of the present invention.

[0024] Reference Numerals:

[0025] 100, gasifier; 200, medium-pressure nitrogen pipeline network,

[0026] 1, pressurizing assembly; 11, pressurizing component; 111, compression component; 12, pressurized transmission pipeline,

[0027] 2, detection assembly; 21, detection component; 22, detection pipeline,

[0028] 3, control assembly; 31, flange gate valve; 32, blind plate. Detailed Embodiments

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] The airtight leak detection and energy-saving system of the gasifier according to the embodiment of the present invention will be described below with reference to the drawings.

[0031] As Figure 1 shown, the airtight leak detection and energy-saving system of the gasifier according to the embodiment of the present invention includes a pressurizing assembly 1 and a detection assembly 2.

[0032] The pressurization assembly 1 includes a pressurizing member 11 and a pressurized delivery pipeline 12. The pressurizing member 11 is connected to the first end of the pressurized delivery pipeline 12. The second end of the pressurized delivery pipeline 12 is connected to the medium-pressure nitrogen pipeline network 200, and the connection point between the pressurized delivery pipeline 12 and the medium-pressure nitrogen pipeline network 200 is located upstream of the gasifier 100. The pressurizing member 11 is used to pressurize the air introduced into the pressurizing member 11 and introduce the pressurized air into the gasifier 100. The detection assembly 2 includes a detection member 21 and a detection pipeline 22. The detection member 21 is provided on the detection pipeline 22. The first end of the detection pipeline 22 is connected to the pressurized delivery pipeline 12, and the detection pipeline 22 is located downstream of the pressurizing member 11. The detection member 21 is used to detect the gas parameters of the gas introduced into the detection pipeline 22.

[0033] Specifically, as Figure 1 shown, the pressurizing member 11 is connected to the first end of the pressurized delivery pipeline 12 and is used to pressurize the introduced air. One end of the pressurized delivery pipeline 12 is connected to the pressurizing member 11, and the other end is connected to the medium-pressure nitrogen pipeline network 200. This connection point is located upstream of the gasifier 100 to ensure that the pressurized air can be sent into the gasifier 100 for a hermetic test. The detection member 21 is provided on the detection pipeline 22, and the detection pipeline 22 is in communication with the pressurized delivery pipeline 12 so that the detection member 21 can detect the gas parameters (such as air pressure, temperature, oil content, etc.) of the air passing through the detection pipeline 22.

[0034] It can be understood that the detection member 21 can be provided with one or more detection devices according to the actual production needs of the system to more accurately and quickly detect gas parameters. It should be noted that a control valve is provided on the detection pipeline 22 to control the on / off of the detection pipeline 22. The detection pipeline 22 can be connected to other devices outside the system. For example, the detection pipeline 22 is connected to other devices such as a heat exchanger, so that the air passing through the pressurizing member 11 can be introduced into other devices before it fails to meet the standards, avoiding waste of energy.

[0035] Optionally, the first end of the pressurized delivery pipeline 12 can be connected to the purifier of the air separation unit, and the purifier of the air separation unit is located upstream of the pressurizing member 11. That is to say, the purifier of the air separation unit can remove impurities and moisture in the air and provide a purer gas source. This helps to prevent corrosion and blockage problems caused by the accumulation of impurities and moisture inside the pressurizing member 11 and the delivery pipeline. The pure air reduces the wear and corrosion inside the pressurizing member 11, extends the service life of the pressurizing member 11, and reduces the maintenance cost.

[0036] Preferably, there can be multiple pressurizing components 1, that is, multiple pressurized delivery pipelines 12 can be connected in parallel to supply high-pressure air to the gasifier 100. That is to say, by connecting multiple pressurized delivery pipelines 12 in parallel, the flow rate of the high-pressure air supplied to the gasifier 100 can be significantly increased to meet the large demand for high-pressure air of the large-scale gasifier 100. In addition, when one pressurized delivery pipeline 12 fails, the other pipelines can still operate normally, ensuring that the airtight leak detection work of the gasifier 100 will not be affected, and enhancing the reliability and stability of the system.

[0037] Thus, the airtight leak detection and energy-saving system of the gasifier in the embodiment of the present invention uses air as the pressurizing medium to replace liquid nitrogen, greatly reducing the consumption of liquid nitrogen, lowering the production cost and reducing the waste of resources. The pressurizing component 1 can quickly provide the required pressure for the gasifier 100, shortening the time required for airtight leak detection and improving the startup efficiency of the overall chemical plant. In addition, the detection component 2 in the system can monitor the gas parameters in real time to ensure the pressure stability of the gasifier 100 during the airtight test and improve the safety of the operation.

[0038] In some embodiments, the pressurizing member 11 includes a plurality of compression members 111, and the plurality of compression members 111 are arranged in sequence along the gas flow direction. It can be understood that the compression ratios of the plurality of compression members 111 gradually increase, enabling staged compression, which can provide only the required pressure increment at each stage, reducing energy loss and improving the overall compression efficiency. And because the compression ratio gradually increases, the pressure and temperature loads borne by each compression member 111 are more uniform, helping to reduce wear and heat generation and extending the service life of the compression member 111.

[0039] In some embodiments, the airtight leak detection and energy-saving system of the gasifier in the embodiment of the present invention further includes a control component 3, and the control component 3 includes a flange gate valve 31, and the flange gate valve 31 is connected to the second end of the pressurized delivery pipeline 12.

[0040] It can be understood that the flange gate valve 31 can precisely control the flow rate and pressure of the high-pressure air to ensure that the gasifier 100 can obtain the required pressure and flow rate during the airtight leak detection process. The flange gate valve 31 can also quickly cut off the gas source in case of emergency, providing safety protection for the system. In addition, by adjusting the opening degree of the flange gate valve 31, the gas pressure inside the gasifier 100 can be flexibly adjusted to meet different airtight leak detection requirements.

[0041] In some embodiments, the control component 3 further includes a blind flange 32. The blind flange 32 is connected to the flange gate valve 31, and the working state of the blind flange 32 is consistent with that of the flange gate valve 31. It can be understood that the blind flange 32 provides an additional isolation means. When the flange gate valve 31 is closed, the blind flange 32 is also in the closed state, which can double ensure the isolation between the gasifier 100 and the external system, improving the safety and reliability of the system.

[0042] That is to say, after the flange gate valve 31 is closed, the closing of the blind flange 32 can serve as an additional safety measure to prevent any potential leakage, especially in the case of high-pressure or hazardous media.

[0043] Optionally, the blind flange 32 can be a figure-eight blind flange 32.

[0044] In some embodiments, the gasifier airtight leak detection and energy-saving system of the embodiments of the present invention further includes a replacement detector 21. The replacement detector 21 is connected to the medium-pressure nitrogen pipeline network 200 and is located upstream of the gasifier 100. The replacement detector 21 is electrically connected to the medium-pressure nitrogen pump on the medium-pressure nitrogen pipeline network 200. The replacement detector 21 is used to detect the oxygen content in the medium-pressure nitrogen pipeline network 200. If the oxygen content in the medium-pressure nitrogen pipeline network 200 is less than a preset value, the replacement detector 21 sends a control signal for normal use to the medium-pressure nitrogen pump on the medium-pressure nitrogen pipeline network 200.

[0045] It can be understood that the replacement detector 21 is used to detect the oxygen content in the medium-pressure nitrogen pipeline network 200 to ensure that the purity of the nitrogen gas supplied to the gasifier 100 meets the requirements, which is crucial for the safe and stable operation of the gasifier 100. By monitoring the oxygen content, the mixing of oxygen with other combustible gases can be prevented, reducing the risks of explosion and fire.

[0046] That is to say, the replacement detector 21 can real-time monitor the oxygen content in the medium-pressure nitrogen pipeline network 200 to ensure that the gas quality is always under control. The replacement detector 21 is electrically connected to the medium-pressure nitrogen pump. When the detected oxygen content is less than the preset value, it can automatically send a control signal for normal use to the medium-pressure nitrogen pump to achieve the automatic control of the system.

[0047] The gasifier airtight leak detection and energy-saving method of the embodiments of the present invention will be described below.

[0048] The gasifier airtight leak detection and energy-saving method of the embodiments of the present invention. The gasifier 100 airtight leak detection and energy-saving method of the present invention is completed by using the gasifier 100 airtight leak detection and energy-saving system in any one of the above embodiments, and includes the following steps:

[0049] S1. Pressurize the air using the pressurization component 1. It can be understood that by starting the pressurizing member 11, air is inhaled from the atmosphere and pressurized to the required pressure level. Using air as the medium for pressurization saves the consumption of liquid nitrogen, reduces costs, and at the same time reduces the impact on the environment. Optionally, devices such as an air separation unit purifier can be employed before the pressurizing member 11 so that the air will pass through the purifier for purification treatment before entering the pressurizing member 11.

[0050] S2. Use the detection component 2 to detect the gas parameters of the pressurized air. The pressurized air is sent into the detector 21 through the detection pipeline 22, and the detector 21 measures the parameters of the air, such as pressure, temperature, humidity, etc., to ensure that the gas meets the requirements for airtightness leak detection. Through the real-time monitoring of the detection component 2, the accuracy and safety of the gas parameters in the gasifier 100 can be ensured, avoiding leak detection failures or equipment damage caused by inconsistent gas parameters.

[0051] In addition, the detector 21 can be electrically connected to the control valve on the pressurized transfer pipeline 12 so that the control valve can control the on-off of the pipeline according to the detection data of the detector 21. That is, when the detector 21 detects that the gas parameters of the air meet the requirements for airtightness leak detection, a control command to open can be sent to the control valve, and thus the control valve opens, enabling the pressurized transfer pipeline 12 to be connected to the gasifier 100.

[0052] S3. Connect the pressurized transfer pipeline 12 to the gasifier 100 and introduce the gas that meets the airtightness leak detection work of the gasifier 100 into the gasifier 100. It can be understood that by opening the flange gate valve 31 and the blind plate 32, the pressurized air is introduced into the gasifier 100 through the pressurized transfer pipeline 12 for airtightness leak detection. By precisely controlling the flow rate and pressure of the gas, airtightness leak detection can be effectively carried out while reducing gas waste.

[0053] S4. After the leak detection is completed, disconnect the pressurized transfer pipeline 12 from the gasifier 100 and start the medium-pressure nitrogen pump to conduct nitrogen replacement on the pipeline. It can be understood that after the leak detection is completed, the flange gate valve 31 and the blind plate 32 are closed to disconnect the connection between the pressurized transfer pipeline 12 and the gasifier 100. Then the medium-pressure nitrogen pump is started to send nitrogen into the pipeline for replacement to remove air or other residual gases. Medium-pressure nitrogen replacement can ensure that the gas inside the gasifier 100 is inert, reducing the oxidation risk, and at the same time preparing a suitable gas source for the subsequent process flow.

[0054] S5. Resume the use of the medium-pressure nitrogen pipeline network until the oxygen content in the medium-pressure nitrogen pipeline network 200 is less than 10 ppm. Monitor the oxygen content in the medium-pressure nitrogen pipeline network 200 through the replacement detection component 21. When the oxygen content drops below 10 ppm, it indicates that the nitrogen replacement is completed and the use of the medium-pressure nitrogen pipeline network can be resumed. Ensure the gas purity in the medium-pressure nitrogen pipeline network to meet the requirements of the subsequent process for nitrogen purity and reduce the risk of oxidation reaction simultaneously.

[0055] In some embodiments, the gas parameters include the air dew point temperature, oil content, and air pressure detected by the boosting component 11, where the air dew point temperature is less than or equal to -63.5 °C, the oil content is less than 0.001 mg / dm3, and the air pressure is greater than 6.7 MPa and less than 6.9 MPa.

[0056] It can be understood that air with a low dew point temperature helps to keep the inside of the gasifier 100 dry, avoid interference of moisture with the gasification process, and reduce equipment corrosion simultaneously. Air with a low oil content helps to keep the inside of the gasifier 100 clean, avoid contamination of the catalyst by oil, and extend the service life of the catalyst. Appropriate pressure can ensure the effect of airtight leak detection inside the gasifier 100 and avoid increasing the mechanical stress of the equipment due to excessive pressure.

[0057] That is to say, the purpose of detecting these gas parameters is to ensure that the air supplied to the gasifier 100 is of high quality and meets the process requirements. Special gas analysis instruments are used to detect the dew point temperature, oil content, and pressure of the air. These instruments can provide accurate readings to ensure that the air quality meets the preset standards. By monitoring these parameters in real time, operators can promptly detect any deviation and take corresponding measures for adjustment to ensure the normal operation of the system.

[0058] In some embodiments, the nitrogen replacement process includes opening the high-point vent valve and sampling valve of the pipeline, maintaining the replacement flow rate not less than 5 m / s, and the replacement time not less than 30 minutes.

[0059] It can be understood that during the nitrogen replacement process, first open the high-point vent valve of the pipeline to discharge the original air or other gases in the system. At the same time, open the sampling valve to facilitate sampling and analysis of the gas in the pipeline during the replacement process to ensure the replacement effect. During the replacement process, it is necessary to maintain the nitrogen flow rate not less than 5 m / s. Such a flow rate can ensure sufficient mixing of nitrogen with the air in the system and accelerate the replacement speed. The replacement process time is not less than 30 minutes. This time is to ensure that there is enough time for nitrogen to thoroughly replace the air in the system and ensure the replacement effect.

[0060] That is to say, by maintaining a high flow rate and sufficient displacement time, the efficiency of nitrogen displacement can be improved to ensure that the air in the system is completely displaced. After nitrogen displacement, the oxygen concentration in the system will be greatly reduced, reducing the risks of oxidation and explosion and ensuring the safety of the operation of the gasifier 100. Through displacement, impurities and pollutants in the system can be removed, reducing the impact on subsequent process flows.

[0061] In some embodiments, during the airtight leak detection, it is necessary to monitor the pressure fluctuations of the medium-pressure nitrogen pipeline network in real time and control the pressure fluctuation range not to exceed ±0.2 MPa.

[0062] It can be understood that the airtight leak detection work of the gasifier 100 requires a stable working environment, and excessive pressure fluctuations may affect the accuracy of leak detection. Severe pressure fluctuations may cause the equipment to bear unnecessary stress, thereby increasing the risk of equipment damage.

[0063] That is to say, a stable pressure of the medium-pressure nitrogen pipeline network helps to improve the accuracy of airtight leak detection and ensure the reliability of the detection results. Controlling the pressure fluctuations can reduce the impact and wear on the equipment and extend the service life of the equipment. Stable pressure helps to optimize the operation process of the gasifier 100 and reduce process interruptions or adjustments caused by pressure fluctuations.

[0064] In some embodiments, in step S4, the following steps are further included: using the blind plate 32 to switch and disconnect the booster conveying pipeline 12 from the gasifier 100, and before performing the energy isolation procedure, confirm that the pressure of the medium-pressure nitrogen pipeline network 200 drops below 0.5 MPa.

[0065] It can be understood that during the nitrogen displacement process, using the blind plate 32 to switch is a safe and effective method to disconnect the connection between the booster conveying pipeline 12 and the gasifier 100. The blind plate 32 switching usually involves placing the blind plate 32 between the flanges to achieve the isolation of the pipeline. Before performing the energy isolation procedure, it is necessary to ensure that the pressure of the medium-pressure nitrogen pipeline network 200 drops to a safe level (such as below 0.5 MPa) to prevent safety risks caused by excessive pressure during the execution of the isolation procedure.

[0066] That is to say, by using the blind plate 32 to switch to disconnect the pipeline, it can be ensured that the gasifier 100 and the booster conveying pipeline 12 are completely isolated during maintenance or displacement operations, reducing the operation risks. Performing the energy isolation procedure after the pressure drops to a safe level can reduce gas leakage caused by excessive pressure, protecting the environment and equipment. Performing the energy isolation procedure after the pressure reduction can ensure the effectiveness of the isolation measures and avoid isolation failure caused by pressure fluctuations.

[0067] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0068] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0069] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0071] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0072] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A gasifier airtight leak detection and energy saving system, characterized in that: include: A booster assembly, the booster assembly comprising a booster and a booster delivery pipeline, the booster is connected to a first end of the booster delivery pipeline, the second end of the booster delivery pipeline is connected to a medium-pressure nitrogen pipeline network, and the connection between the booster delivery pipeline and the medium-pressure nitrogen pipeline network is located upstream of the gasifier, the booster is used to pressurize the air passed into the booster, and pass the pressurized air into the gasifier; A detection component, the detection component includes a detection piece and a detection pipeline, the detection piece is arranged on the detection pipeline, the first end of the detection pipeline is connected to the boost delivery pipeline, and the detection pipeline is located downstream of the boost piece, and the detection piece is used to detect the gas parameters passed into the detection pipeline.

2. The gasifier airtight leak detection and energy saving system according to claim 1 is characterized in that: The pressurizing element includes a plurality of compression components, and the plurality of compression components are arranged in sequence along the gas flow direction.

3. The gasifier airtight leak detection and energy saving system according to claim 2 is characterized in that: It also includes a control component, which includes a flange gate valve, and the flange gate valve is connected to the second end of the boosting and conveying pipeline.

4. The gasifier airtight leak detection and energy saving system according to claim 3 is characterized in that: The control assembly further comprises a blind plate, which is connected to the flange gate valve, and a working state of the blind plate is consistent with a working state of the flange gate valve.

5. The gasifier airtight leak detection and energy saving system according to claim 4 is characterized in that: It also includes a replacement detection component, which is connected to the medium-pressure nitrogen pipeline network and is located upstream of the gasifier. The replacement detection component is electrically connected to the medium-pressure nitrogen pump on the medium-pressure nitrogen pipeline network. The replacement detection component is used to detect the oxygen content in the medium-pressure nitrogen pipeline network. If the oxygen content in the medium-pressure nitrogen pipeline network is less than a preset value, the replacement detection component sends a normal use control signal to the medium-pressure nitrogen pump on the medium-pressure nitrogen pipeline network.

6. A gasifier gas leak detection and energy saving method, the gasifier gas leak detection and energy saving method is completed by using the gasifier gas leak detection and energy saving system according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Pressurizing the air using a booster assembly; S2. Detect gas parameters of the pressurized air using a detection component; S3, connecting the booster transmission pipeline and the gasifier, and passing the gas that meets the gasifier gas tightness leak detection work into the gasifier; S4. After the leak detection is completed, disconnect the booster transmission pipeline from the gasifier, and start the medium-pressure nitrogen pump to replace the pipeline with nitrogen; S5. Resume the use of the medium-pressure nitrogen pipeline network until the oxygen content in the medium-pressure nitrogen pipeline network is less than 10 ppm.

7. The gasifier gas leak detection and energy saving method according to claim 6, characterized in that: The gas parameters include detecting the air dew point temperature, oil content and air pressure of the supercharger, wherein the air dew point temperature is less than or equal to -63.5°C, the oil content is less than 0.001 mg / dm3, and the air pressure is greater than 6.7 MPa and less than 6.9 MPa.

8. The gasifier airtight leak detection and energy saving method according to claim 7 is characterized in that: The nitrogen replacement process includes opening the pipeline high point vent valve and sampling valve, maintaining the replacement flow rate not less than 5m / s, and the replacement time is not less than 30 minutes.

9. The gasifier gas leak detection and energy saving method according to claim 8, characterized in that: During the airtight leak detection, the pressure fluctuation of the medium-pressure nitrogen pipeline network needs to be monitored in real time, and the pressure fluctuation range must be controlled not to exceed ±0.2MPa.

10. The gasifier gas leak detection and energy saving method according to claim 9, characterized in that: In step S4, the following steps are also included: using a blind plate switch to disconnect the booster transmission pipeline and the gasifier, and before executing the energy isolation procedure, confirming that the pressure of the medium-pressure nitrogen pipeline network drops below 0.5MPa.

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