High-sulfur-content gas field flash steam pressurizing device and control method thereof

Abstract

The invention discloses a high-sulfur-content gas field flash steam pressurizing device and a control method thereof. The high-sulfur-content gas field flash steam pressurizing device comprises a diaphragm compressor, and the diaphragm compressor is provided with a first-stage diaphragm head and a second-stage diaphragm head; the device further comprises an inlet separator, a first-stage cooling exchanger, a first-stage gas-liquid separator, a second-stage cooling exchanger and a second-stage gas-liquid separator, wherein the inlet separator is respectively connected to the high-sulfur-content gas inlet, the vent nozzle, the drain outlet and the first-stage membrane head; the first-stage cooling exchanger is respectively connected to the first-stage membrane head and the first-stage gas-liquid separator; the first-stage gas-liquid separator is respectively connected to the first-stage cooling exchanger, the vent nozzle, the drain outlet and the second-stage membrane head; the second-stage cooling exchanger is respectively connected to the second-stage membrane head and the second-stage gas-liquid separator; the second-stage gas-liquid separator is respectively connected to the second-stage cooling exchanger, the high-sulfur-content gas outlet, the vent nozzle and the drain outlet; the invention further provides a matched use method. According to the method, the pressurization requirement of high-sulfur-content flash steam can be met, and accurate control over the whole process is achieved through the new technology.

Description

Technical Field

[0001] The invention belongs to the technical field of natural gas development, and in particular is a flash steam boosting device for a high-sulfur gas field and a control method thereof. Background Art

[0002] Natural gas processing plants and other production facilities have the problem of tail gas emissions during the production process. The current conventional treatment method is to discharge the tail gas directly into the atmosphere through flare incineration. Although this treatment method can remove most pollutants, it still causes certain environmental pollution and there is a huge waste of resources. The exhaust gas needs to be deeply treated to meet the emission requirements. Among the several components of tail gas, sulfur-containing tail gas is the most important. Natural gas processing plants need to pressurize and recover the sulfur-containing tail gas from existing and newly built desulfurization devices to replace the traditional treatment method of sulfur-containing tail gas to flare incineration.

[0003] It is extremely difficult to pressurize the sulfur-containing tail gas from the desulfurization device. Under the current process conditions, the sulfur-containing tail gas comes from flash gas. The hydrogen sulfide component in the flash gas can reach up to 80%, and it contains water, with a water content of up to 15%. In addition, there are many other media such as methane. Under this condition, the process requires the flash gas containing hydrogen sulfide to be pressurized from a low pressure of 10-30Kpa to an ultra-high pressure of 8-11Mpa. How to safely and stably achieve this pressurization process requirement is currently a difficult problem that the entire industry needs to solve. The difficulty mainly lies in the fact that hydrogen sulfide is a highly toxic and flammable gas. It is necessary to ensure that hydrogen sulfide cannot leak during the pressurization process, otherwise there will be great risks of life, safety and environmental accidents. The pressure ratio of the pressurization is high, and wet hydrogen sulfide has high corrosiveness and mechanical tolerance to equipment materials. To pressurize the medium stably for a long time, there are great difficulties and challenges from the process flow to the equipment.

[0004] According to the current conventional processing method in the industry, a multi-stage piston compressor is generally selected for supercharging according to the pressure ratio requirements of the supercharging. Due to the limitations of its own structural characteristics, the piston compressor requires 5 to 6 stages to achieve supercharging under this working condition, and leakage will occur at the packing of each stage, which poses a safety risk and pollutes the environment. To solve the leakage at the packing, an additional nitrogen collection system must be used to recover the leaked gas, which requires additional investment costs, and the recovered gas also needs to be processed again. The system is complex, difficult to manage and costly. In addition, the temperature of natural gas cannot be too high during supercharging, otherwise it will affect the sealing mechanism, etc. Therefore, some of the existing technologies also adopt the method of pre-cooling before sending it in for supercharging, but this operation increases the external work process and increases the overall footprint of the equipment. Therefore, it is necessary to design a high-sulfur flash gas supercharging device. It can solve some or all of the above problems. Summary of the invention

[0005] In response to some or all of the above-mentioned problems, the present invention provides a flash steam pressurization device for a high-sulfur gas field and a control method thereof. By designing a new integrated system, it can better cope with the pressurization demand of high-sulfur flash steam and more accurately realize precise control of the entire process.

[0006] The technical solution of the present invention is as follows: A flash steam boosting device for a high-sulfur gas field comprises a diaphragm compressor, wherein the diaphragm compressor is provided with a primary diaphragm head and a secondary diaphragm head; further comprising an inlet separator, a primary cooling exchanger, a primary gas-liquid separator, a secondary cooling exchanger, and a secondary gas-liquid separator, wherein the inlet separator is respectively connected to a high-sulfur gas inlet, a vent, a sewage outlet, and a primary diaphragm head; the primary cooling exchanger is respectively connected to the primary diaphragm head and the primary gas-liquid separator; the primary gas-liquid separator is respectively connected to the primary cooling exchanger, the vent, the sewage outlet, and the secondary diaphragm head; the secondary cooling exchanger is respectively connected to the secondary diaphragm head and the secondary gas-liquid separator; the secondary gas-liquid separator is respectively connected to the secondary cooling exchanger, a high-sulfur gas outlet, a vent, and a sewage outlet; and a control cabinet is also provided.

[0007] Furthermore, the high-sulfur gas inlet is connected to an air inlet pipeline, a pressure transmitter 1 is provided on the side of the air inlet pipeline, and a separator condensation filter element is provided in the inlet separator; the air inlet pipeline is connected to the bottom of the separator condensation filter element, and a pressure transmitter 2 is provided on the side wall above the separator condensation filter element, and the pressure transmitter 2 is connected to the pressure transmitter 1; an inlet separator magnetic flap level gauge is provided on the bottom side of the inlet separator, and an inlet separator condensate discharge valve is provided at the bottom of the inlet separator, and the inlet separator condensate discharge valve is connected to the sewage outlet through a condensate discharge collecting pipe; the separator condensation filter element is installed on the upper side of the inlet separator at the connection with the air inlet pipeline, and a connecting pipe 1 is provided on the side wall of the inlet separator on the upper side of the separator condensation filter element, which is connected to the primary membrane head through the connecting pipe 1; a pipeline connected to the vent is provided on the top of the inlet separator, and a manual vent valve is provided in front of the vent.

[0008] Furthermore, the first-stage membrane head is connected to the first-stage cooling exchanger through a second connecting pipe, and a third pressure transmitter is provided on the first-stage cooling exchanger. The first-stage cooling exchanger is also connected to the side of the first-stage gas-liquid separator through a third connecting pipe.

[0009] Furthermore, a separator condensation filter element is arranged inside the first-level gas-liquid separator, and the position of the connecting pipe three is located at the lower side of the separator condensation filter element, and a pressure transmitter four is also arranged on the lower side of the separator condensation filter element; a connecting pipe four is arranged on the side wall on the upper side of the separator condensation filter element of the first-level gas-liquid separator and connected to the secondary membrane head, and a pressure transmitter four is also arranged on the side wall on the upper side of the separator condensation filter element; a first-level separator magnetic flap level gauge is arranged on the bottom side of the first-level gas-liquid separator, and a first-level separator condensate discharge valve is arranged at the bottom of the first-level gas-liquid separator, and the first-level separator condensate discharge valve is connected to the sewage outlet through the condensate discharge collecting pipe; a first-level separator manual vent pipeline is arranged on the top of the first-level gas-liquid separator and connected to the vent.

[0010] Furthermore, two forked pipelines are provided at the end of the connecting pipe four as connecting pipe six, both connecting pipes six are connected to the secondary membrane head, and a section of connecting pipe five is provided at the front end of the two connecting pipes six, and the thickness of the connecting pipe five is greater than that of the connecting pipe four.

[0011] Furthermore, the secondary membrane head is connected to the secondary cooling exchanger through the secondary membrane head exhaust pipe, and the secondary cooling exchanger is provided with a pressure transmitter six; the secondary cooling exchanger is connected to the secondary gas-liquid separator through a connecting pipe seven; a safety valve is also provided on the secondary membrane head exhaust pipe, and the safety valve is connected to the vent.

[0012] Furthermore, a secondary separator filter element is provided inside the secondary gas-liquid separator, and the secondary separator filter element is a filter filter element; the connection between the connecting pipe 7 and the secondary gas-liquid separator is located below the secondary separator filter element, a secondary separator magnetic flap level gauge is provided on the bottom side of the secondary gas-liquid separator, a secondary separator condensate discharge valve is provided at the bottom of the secondary gas-liquid separator, and the secondary separator condensate discharge valve is connected to the drain port through the condensate discharge collection pipe; a secondary separator vent pipe is provided above the secondary separator filter element of the secondary gas-liquid separator and is connected to the vent port; A secondary separator exhaust pipe connected to the high-sulfur gas outlet is provided on the side above the secondary separator filter element of the liquid separator, and an exhaust check valve and an exhaust pipe manual valve are provided on the secondary separator exhaust pipe. A branch pipeline is provided on the pipeline before the exhaust check valve as a reflux pipeline, and the reflux pipeline is connected to the air intake pipeline; a reflux regulating valve is provided on the reflux pipeline, and an instrument air outlet is provided on the reflux regulating valve; another branch pipeline is also provided on the secondary separator exhaust pipe and connected to the vent, a vent valve is provided on the pipeline, and a vent limiting flow orifice is provided before the vent valve.

[0013] Furthermore, an inlet separator flow limiting orifice is provided after the inlet separator condensate discharge valve, a first-stage separator flow limiting orifice is provided after the first-stage separator condensate discharge valve, and a second-stage separator flow limiting orifice is provided after the second-stage separator condensate discharge valve.

[0014] Furthermore, a temperature transmitter 1 is provided on the inlet separator, a temperature transmitter 2 is provided on the connecting pipe 2, and a temperature transmitter 3 is provided on the secondary membrane head exhaust pipe.

[0015] A control method for pressurizing and recovering flash steam water from a high-sulfur gas field, using a flash steam pressurizing device for a high-sulfur gas field as described above, and the steps are as follows: S1, the raw gas, i.e., the high-sulfur flash gas, enters from the high-sulfur gas inlet and is sent to the inlet separator for condensation and separation. The separated water is discharged through the inlet separator condensate discharge valve and the condensate discharge manifold. At the same time, the high-sulfur flash gas after water removal enters the first-stage membrane head for pressurization and is sent to the first-stage cooling exchanger; If the pressure is too high during the process of feeding into the primary cooling exchanger, the safety valve will be activated to discharge the high-pressure gas from the vent; S2. Since the temperature of the high-sulfur gas increases due to the pressure increase, the high-sulfur gas is cooled by the primary cooling exchanger and then sent to the primary gas-liquid separator to remove moisture again. The removed water is discharged through the condensate discharge valve and the condensate discharge manifold of the primary separator. At the same time, the high-sulfur gas after the water is removed enters the secondary membrane head for pressurization and is sent to the secondary cooling exchanger. Wherein, the connecting pipe 6 is provided with two sections entering the secondary membrane head respectively, so as to evenly disperse the gas into the secondary membrane head and then increase the pressure, thereby reducing the impact on the pipeline; S3, the high sulfur gas sent to the secondary cooling exchanger enters the secondary gas-liquid separator after cooling; If the pressure is too high during the process of feeding into the secondary cooling exchanger, the second safety valve will be activated to discharge the high-pressure gas from the vent; S4. In addition to the basic separation of water, the secondary gas-liquid separator also plays the role of filtering impurities, so that the gas can be discharged from the high-sulfur gas outlet, and the removed water is discharged through the secondary separator condensate discharge valve and the condensate discharge manifold. At the same time, if the gas source pressure is insufficient and lower than the set value of the pressure transmitter 1, the pressure cannot form a gas transmission effect. At this time, open the reflux regulating valve to allow gas to reflux, thereby driving more high-sulfur gas sent from the high-sulfur gas inlet to enter the inlet separator; The control mode of reflux regulation is PID mode. According to the set P\I, the opening of the reflux regulating valve is proportionally opened; after the pressure rises, the reflux regulating valve gradually reduces its opening until it is completely closed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts a brand-new process design, through multi-stage pressurization and cooling, the whole process is simple and efficient. When the gas source pressure is insufficient, it can realize return pressurization. When the pipeline pressure is too high, it can realize discharge pressure, etc. On the basis of realizing pressurization, it can also complete the dehydration of natural gas, effectively realizing the maintenance of equipment life.

[0017] Compared with the multi-stage supercharging in the prior art, the present invention has relatively fewer supercharging stages, but does not reduce the supercharging effect, thereby saving the number of equipment and occupied space, and is more conducive to cost control and maintenance management.

[0018] The efficiency of the equipment's process steps is improved by using pressure, temperature and other methods, and emergency pressure relief and other treatments are carried out through various protective measures to effectively protect the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the system structure of the present invention.

[0020] Figure 2 for Figure 1 Detail of the upper left part.

[0021] Figure 3 for Figure 1 Detail of the upper middle part of the image.

[0022] Figure 4 for Figure 1 Detail of the upper right part of the image.

[0023] Figure 5 for Figure 1 Detail of the lower left part.

[0024] Figure 6 for Figure 1 Detail of the upper middle part of the image.

[0025] Figure 7 for Figure 1 Detail of the upper right part of the image.

[0026] In the figure: N1: high sulfur gas inlet; N2: high sulfur gas outlet; N3: vent; N4: sewage outlet; N5: instrument air outlet; N6: membrane head leakage detection port; N7: vent; N8: cooling water inlet; N9: cooling water outlet; 001: air intake pipeline; 002: pressure transmitter 1; 003: inlet separator; 004: pressure transmitter 2; 005: separator condensation filter element; 006: temperature transmitter 1; 007: inlet separator magnetic flap level gauge; 008: inlet separator condensation filter element; Liquid discharge valve; 009: Inlet separator flow limiting orifice; 010: Connecting pipe 1; 011: Primary membrane head; 012: Connecting pipe 2; 013: Temperature transmitter 2; 014: Safety valve 1; 015: Primary separator vent branch; 016: Pressure transmitter 3; 017: Primary cooling exchanger; 018: Connecting pipe 3; 019: Primary gas-liquid separator filter element; 020: Primary gas-liquid separator; 021: Primary separator manual vent pipeline; 022: Pressure transmitter 4; 023: Pressure 024: Magnetic flap level gauge for primary separator; 025: Condensate discharge valve for primary separator; 026: Flow limiting orifice for primary separator; 027: Connecting pipe 4; 028: Connecting pipe 5; 029: Connecting pipe 6; 030: Secondary membrane head; 031: Secondary membrane head exhaust pipe; 032: Temperature transmitter 3; 033: Pressure transmitter 6; 034: Secondary cooling exchanger; 035: Safety valve 2; 036: Connecting pipe 7; 037: Secondary gas-liquid separator; 038: Secondary separator 039: Secondary separator vent pipe; 040: Secondary separator exhaust pipe; 041: reflux pipeline; 042: reflux regulating valve; 043: Vent flow limiting orifice plate; 044: Vent valve; 045: Manual vent valve; 046: Secondary separator magnetic flap level gauge; 047: Secondary separator condensate discharge valve; 048: Secondary separator flow limiting orifice plate; 049: Condensate discharge collection pipe; 050: Exhaust check valve; 051: Exhaust pipe manual valve: 052 Control cabinet; 053 Compressor. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0028] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "bottom", "top", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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 cannot be understood as a limitation on the present invention.

[0029] like Figure 1-7 As shown, a flash steam boosting device for a high-sulfur gas field includes a diaphragm compressor 053, wherein the diaphragm compressor 053 is provided with a primary membrane head 011 and a secondary membrane head 030; further comprising an inlet separator 003, a primary cooling exchanger 017, a primary gas-liquid separator 020, a secondary cooling exchanger 034, and a secondary gas-liquid separator 037, wherein the inlet separator 003 is respectively connected to a high-sulfur gas inlet N1, a venting port N3, a sewage outlet N4, and the primary membrane head 011; the primary cooling exchanger 017 is ... 17 are respectively connected to the primary membrane head 011 and the primary gas-liquid separator 020; the primary gas-liquid separator 020 is respectively connected to the primary cooling exchanger 017, the vent N3, the sewage outlet N4, and the secondary membrane head 030; the secondary cooling exchanger 034 is respectively connected to the secondary membrane head 030 and the secondary gas-liquid separator 037; the secondary gas-liquid separator 037 is respectively connected to the secondary cooling exchanger 034, the high sulfur gas outlet N2, the vent N3, and the sewage outlet N4; and a control cabinet 052 is also provided. The aforementioned devices are all arranged in a skid body, thereby saving space and facilitating transportation and placement.

[0030] Specifically, the high-sulfur gas inlet N1 is connected to the air intake pipeline 001. Preferably, the pipeline of the air intake pipeline 001 needs electric heating and insulation to ensure the air intake temperature and avoid the formation of sulfur-containing hydrates in the medium. A pressure transmitter 002 is provided on the side of the air intake pipeline 001. The pressure transmitter 002 is used to detect the air intake pressure of the raw gas; whether it meets the working conditions required by the compressor; a low-pressure alarm and LL interlocking shutdown protection device are provided; a separator condensation filter element 005 is provided in the inlet separator 003. The separator condensation filter element 005 has a filtration accuracy of 3 microns and is an internal pressure condensation filter element, which can separate the moisture in the medium and make the medium drier; the air intake pipeline 001 is connected to the bottom of the separator condensation filter element 005, and a pressure transmitter 2 004 is provided on the side wall above the separator condensation filter element 005. The pressure transmitter 2 004 and the pressure transmitter 1 002 are connected through a data line (such as Figure 2As shown, it should be noted that this is only an example, the actual connection may be different, and even no wired connection may be used, but wireless transmission and reception may be used for comparison; or both may be connected to an external control box for comparison. Similarly, the subsequent first-level gas-liquid separator 020 and the second-level gas-liquid separator 037 are also provided with similar pressure difference judgment devices, but the connecting lines are not shown separately in the figure), and the pressure difference between the two can be known; an inlet separator magnetic flap level gauge 007 is provided on the side of the bottom of the inlet separator 003, and an inlet separator condensate discharge valve 008 is provided at the bottom of the inlet separator 003. The inlet separator condensate discharge valve 008 is designed as a gas The movable valve is FC-shaped and can be closed in case of air loss; the inlet separator condensate discharge valve 008 is connected to the sewage outlet N4 through the condensate discharge collecting pipe 049; the separator condensation filter element 005 is installed on the upper side of the inlet separator 003 at the connection with the air inlet pipeline 001, and a connecting pipe 010 is provided on the side wall of the inlet separator 003 on the upper side of the separator condensation filter element 005, which is connected to the first-level membrane head 011 through the connecting pipe 010; a pipeline connected to the vent N3 is provided on the top of the inlet separator 003, and a manual vent valve 045 is provided in front of the vent N3, and the manual vent valve 045 is normally open when the equipment is running.

[0031] The first-stage membrane head 011 is connected to the first-stage cooling exchanger 017 via a second connecting pipe 012 , and a third pressure transmitter 016 is provided on the first-stage cooling exchanger 017 . The first-stage cooling exchanger 017 is also connected to the side of the first-stage gas-liquid separator 020 via a third connecting pipe 018 .

[0032] A separator condensation filter element 050 is arranged inside the first-level gas-liquid separator 020, and the position of the connecting pipe three 018 is located at the lower side of the separator condensation filter element 050, and a pressure transmitter four 023 is also arranged at the lower side of the separator condensation filter element 050; a connecting pipe four 027 is arranged on the side wall on the upper side of the separator condensation filter element 050 of the first-level gas-liquid separator 020 and is connected to the secondary membrane head 030, and a pressure transmitter four 022 is also arranged on the side wall on the upper side of the separator condensation filter element 050; a first-level separator magnetic flap level gauge 024 is arranged on the bottom side of the first-level gas-liquid separator 020, and a first-level separator condensate discharge valve 025 is arranged at the bottom of the first-level gas-liquid separator 020, and the first-level separator condensate discharge valve 025 is connected to the sewage outlet N4 through the condensate discharge collection pipe 049; a first-level separator manual venting pipeline 021 is arranged on the top of the first-level gas-liquid separator 020 and is connected to the venting outlet N3.

[0033] At the end of the connecting tube four 027, two forked pipelines are provided as connecting tube six 029, and the two connecting tubes six 029 are connected to the secondary membrane head 030, and at the front end of the two connecting tubes six 029, a section of connecting tube five 028 is provided, and the thickness of the connecting tube five 028 is greater than that of the connecting tube four 027.

[0034] The secondary membrane head 030 is connected to the secondary cooling exchanger 034 through the secondary membrane head exhaust pipe 031, and the secondary cooling exchanger 034 is provided with a pressure transmitter six 033; the secondary cooling exchanger 034 is connected to the secondary gas-liquid separator 037 through the connecting pipe seven 036; the secondary membrane head exhaust pipe 031 is also provided with a safety valve 035, and the safety valve 035 is connected to the vent N3.

[0035] The secondary gas-liquid separator 037 is provided with a secondary separator filter element 039 inside, and the secondary separator filter element 039 is a filter filter element; the connection between the connecting pipe 7 036 and the secondary gas-liquid separator 037 is located below the secondary separator filter element 039, and a secondary separator magnetic flap level gauge 046 is provided on the bottom side of the secondary gas-liquid separator 037, and a secondary separator condensate discharge valve 047 is provided at the bottom of the secondary gas-liquid separator 037, and the secondary separator condensate discharge valve 047 is connected to the sewage outlet N4 through the condensate discharge collection pipe 049; a second separator filter element 039 is provided above the secondary gas-liquid separator 037. The secondary separator vent pipe 038 is connected to the vent port N3; a secondary separator exhaust pipe 040 connected to the high sulfur gas outlet N2 is provided on the side above the secondary separator filter element 039 of the secondary gas-liquid separator 037, and an exhaust check valve 050 and an exhaust pipe manual valve 051 are provided on the secondary separator exhaust pipe 040. The exhaust pipe manual valve 051 is a normally open valve when the equipment is running. When the equipment is inspected and maintained, closing this valve can disconnect the equipment from the system; a branch pipeline is provided on the pipeline before the exhaust check valve 050 as a return pipeline 041, and the return pipeline 041 is connected to the intake pipeline 001; in the following example, Figure 1 and Figure 5 There is a separate signal control line below the reflux pipeline 041 shown, which is used to control the reflux; a reflux regulating valve 042 is provided on the reflux pipeline 041, and the reflux regulating valve 042 has an instrument air outlet N5; another branch pipeline is also provided on the secondary separator exhaust pipe 040 and connected to the vent N3, on which a vent valve 044 is provided, and a vent limiting orifice plate 043 is provided before the vent valve 044.

[0036] An inlet separator flow limiting orifice 009 is provided after the inlet separator condensate discharge valve 008, a first-stage separator flow limiting orifice 026 is provided after the first-stage separator condensate discharge valve 025, and a second-stage separator flow limiting orifice 048 is provided after the second-stage separator condensate discharge valve 047. The use of flow limiting orifices can control the discharge flow rate of the liquid to avoid being too fast or too slow, which affects subsequent separation.

[0037] A temperature transmitter 1 006 is provided on the inlet separator 003 , a temperature transmitter 2 013 is provided on the connecting pipe 2 012 , and a temperature transmitter 3 032 is provided on the secondary membrane head exhaust pipe 031 .

[0038] A control method for pressurizing and recovering flash steam from a high-sulfur gas field, using a flash steam pressurizing device for a high-sulfur gas field as described above, comprises the following steps: S1, the raw gas, i.e., the high-sulfur flash gas, enters from the high-sulfur gas inlet N1 and is sent to the inlet separator 003 for condensation separation. The separated water is discharged through the inlet separator condensate discharge valve 008 and the condensate discharge manifold 049. At the same time, the high-sulfur flash gas after the water is removed enters the first-stage membrane head 011 for pressurization and is sent to the first-stage cooling exchanger 017. After the first-stage pressure increase, the pressure is increased to 0.8-1.0MPa; The data between the pressure transmitter 1 002 and the pressure transmitter 2 004 are connected, and the blockage of the filter element is judged by the pressure difference, and a reminder to replace the filter element is issued when the set value is reached; the pressure drop difference of the filter element is generally set to 10KPa; If the pressure is too high during the process of feeding into the primary cooling exchanger 017, the safety valve 1 014 will be activated to discharge the high-pressure gas from the vent N3. The pressure of the safety valve 1 014 is designed to be 1.15 times the pressure of the connecting pipe 2 012; S2. Since the pressure increase will increase the temperature of the high-sulfur gas, the high-sulfur gas is cooled by the primary cooling exchanger 017 and then sent to the primary gas-liquid separator 020 to remove water again. The removed water is discharged through the primary separator condensate discharge valve 025 and the condensate discharge manifold 049. At the same time, the high-sulfur gas after water removal enters the secondary membrane head 030 for pressurization and is sent to the secondary cooling exchanger 034. After the secondary pressure increase, the pressure increases to 8.0-10.0MPa. The connecting pipe 6 029 is provided with two sections that enter the secondary membrane head 030 respectively, so as to evenly disperse the gas into the secondary membrane head 030 and then increase the pressure, thereby reducing the impact on the pipeline; S3, the high sulfur gas sent to the secondary cooling exchanger 034 enters the secondary gas-liquid separator 037 after cooling; If the pressure is too high during the process of being sent to the secondary cooling exchanger 034, the safety valve 2 035 will be activated to discharge the high-pressure gas from the vent N3. The pressure of the safety valve 2 035 is designed to be 1.15 times the pressure of the secondary membrane head exhaust pipe 031; S4, the secondary gas-liquid separator 037, in addition to the basic separation of water, also plays the role of filtering impurities, so that the gas can be discharged from the high-sulfur gas outlet N2, and the removed water is discharged through the secondary separator condensate discharge valve 047 and the condensate discharge manifold 049. At the same time, if the gas source pressure is insufficient and lower than the set value of the pressure transmitter 002, since the pressure cannot form the effect of gas transmission, the reflux regulating valve 042 is opened at this time to allow the gas to reflux, thereby driving more high-sulfur gas sent from the high-sulfur gas inlet N2 to enter the inlet separator 003; The control mode of reflux regulation is PID mode. According to the set P\I, the opening of the reflux regulating valve 042 is proportionally opened; after the pressure rises, the reflux regulating valve 042 gradually reduces the opening until it is completely closed.

[0039] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A flash steam booster device for a high-sulfur gas field, characterized in that: The invention comprises a diaphragm compressor (053), wherein the diaphragm compressor (053) is provided with a primary membrane head (011) and a secondary membrane head (030); further comprising an inlet separator (003), a primary cooling exchanger (017), a primary gas-liquid separator (020), a secondary cooling exchanger (034), and a secondary gas-liquid separator (037); the inlet separator (003) is respectively connected to a high-sulfur gas inlet (N1), a venting port (N3), a sewage outlet (N4), and a primary membrane head (011); the primary cooling exchanger (017) is respectively connected to a primary membrane The first-level gas-liquid separator (020) is connected to the first-level cooling exchanger (017), the vent (N3), the sewage outlet (N4), and the second-level membrane head (030); the second-level cooling exchanger (034) is connected to the second-level membrane head (030) and the second-level gas-liquid separator (037); the second-level gas-liquid separator (037) is connected to the second-level cooling exchanger (034), the high-sulfur gas outlet (N2), the vent (N3), and the sewage outlet (N4); a control cabinet (052) is also provided.

2. A flash steam booster device for high-sulfur gas fields according to claim 1, characterized in that: The high-sulfur gas inlet (N1) is connected to the air intake pipeline (001), a pressure transmitter 1 (002) is provided on the side of the air intake pipeline (001), and a separator condensation filter element (005) is provided in the inlet separator (003); the air intake pipeline (001) is connected to the bottom of the separator condensation filter element (005), a pressure transmitter 2 (004) is provided on the side wall above the separator condensation filter element (005), and the pressure transmitter 2 (004) and the pressure transmitter 1 (002) are connected; an inlet separator magnetic flap level gauge (007) is provided on the bottom side of the inlet separator (003), and an inlet separator is provided at the bottom of the inlet separator (003). A separator condensate discharge valve (008), the inlet separator condensate discharge valve (008) is connected to the sewage outlet (N4) through a condensate discharge collection pipe (049); the separator condensation filter element (005) is installed on the upper side of the inlet separator (003) at the connection with the air inlet pipeline (001), and a connecting pipe 1 (010) is provided on the side wall of the inlet separator (003) located on the upper side of the separator condensation filter element (005), and is connected to the primary membrane head (011) through the connecting pipe 1 (010); a pipeline connected to the vent (N3) is provided on the top of the inlet separator (003), and a manual vent valve (045) is provided in front of the vent (N3).

3. A flash steam booster device for high-sulfur gas fields according to claim 2, characterized in that: The first-stage membrane head (011) is connected to the first-stage cooling exchanger (017) via a second connecting pipe (012), and a third pressure transmitter (016) is provided on the first-stage cooling exchanger (017). The first-stage cooling exchanger (017) is also connected to the side of the first-stage gas-liquid separator (020) via a third connecting pipe (018).

4. A flash steam booster device for high-sulfur gas fields according to claim 3, characterized in that: A separator condensation filter element (050) is arranged inside the primary gas-liquid separator (020); a connecting pipe three (018) is located at the lower side of the separator condensation filter element (050); and a pressure transmitter four (023) is also arranged at the lower side of the separator condensation filter element (050); a connecting pipe four (027) is arranged on the side wall on the upper side of the separator condensation filter element (050) of the primary gas-liquid separator (020) and is connected to the secondary membrane head (030); and a pressure transmitter four (023) is also arranged on the side wall on the upper side of the separator condensation filter element (050) of the primary gas-liquid separator (020). There is a pressure transmitter four (022); a first-stage separator magnetic flap level gauge (024) is provided on the bottom side of the first-stage gas-liquid separator (020); a first-stage separator condensate discharge valve (025) is provided at the bottom of the first-stage gas-liquid separator (020); the first-stage separator condensate discharge valve (025) is connected to the drain port (N4) through the condensate discharge manifold (049); a first-stage separator manual vent pipeline (021) is provided on the top of the first-stage gas-liquid separator (020) and is connected to the vent port (N3).

5. The flash steam boosting device for high-sulfur gas fields according to claim 4, characterized in that: Two forked pipelines are provided at the end of the connecting tube four (027) as connecting tube six (029), and the two connecting tubes six (029) are both connected to the secondary membrane head (030), and a section of connecting tube five (028) is provided at the front end of the two connecting tubes six (029), and the thickness of the connecting tube five (028) is greater than that of the connecting tube four (027).

6. A flash steam boosting device for a high-sulfur gas field according to claim 5, characterized in that: The secondary membrane head (030) is connected to the secondary cooling exchanger (034) via the secondary membrane head exhaust pipe (031), and the secondary cooling exchanger (034) is provided with a pressure transmitter six (033); the secondary cooling exchanger (034) is connected to the secondary gas-liquid separator (037) via a connecting pipe seven (036); a safety valve (035) is also provided on the secondary membrane head exhaust pipe (031), and the safety valve (035) is connected to the vent (N3).

7. The flash steam boosting device for high-sulfur gas fields according to claim 6, characterized in that: A secondary separator filter element (039) is provided inside the secondary gas-liquid separator (037), and the secondary separator filter element (039) is a filter element; the connection between the connecting pipe (036) and the secondary gas-liquid separator (037) is located below the secondary separator filter element (039); a secondary separator magnetic flap level gauge (046) is provided on the bottom side of the secondary gas-liquid separator (037); a secondary separator condensate discharge valve (047) is provided at the bottom of the secondary gas-liquid separator (037), and the secondary separator condensate discharge valve (047) is connected to the sewage outlet (N4) through the condensate discharge manifold (049); a secondary separator vent pipe (038) is provided above the secondary separator filter element (039) of the secondary gas-liquid separator (037) and is connected to the vent port (N3); a secondary separator vent pipe (038) is provided at the bottom of the secondary gas-liquid separator (037); A secondary separator exhaust pipe (040) connected to the high-sulfur gas outlet (N2) is provided on the side above the secondary separator filter element (039), and an exhaust check valve (050) and an exhaust pipe manual valve (051) are provided on the secondary separator exhaust pipe (040). A branch pipeline is provided on the pipeline before the exhaust check valve (050) as a return pipeline (041), and the return pipeline (041) is connected to the intake pipeline (001); a return regulating valve (042) is provided on the return pipeline (041), and the return regulating valve (042) is provided with an instrument air outlet (N5); another branch pipeline is also provided on the secondary separator exhaust pipe (040) and connected to the vent (N3), a vent valve (044) is provided on the pipeline, and a vent limiting orifice (043) is provided before the vent valve (044).

8. The flash steam boosting device for high-sulfur gas fields according to claim 7, characterized in that: An inlet separator flow limiting orifice (009) is provided behind the inlet separator condensate discharge valve (008), a first-stage separator flow limiting orifice (026) is provided behind the first-stage separator condensate discharge valve (025), and a second-stage separator flow limiting orifice (048) is provided behind the second-stage separator condensate discharge valve (047).

9. The flash steam boosting device for high-sulfur gas fields according to claim 8, characterized in that: A temperature transmitter 1 (006) is provided on the inlet separator (003), a temperature transmitter 2 (013) is provided on the connecting pipe 2 (012), and a temperature transmitter 3 (032) is provided on the secondary membrane head exhaust pipe (031).

10. A control method for pressurizing and recovering flash steam from a high-sulfur gas field, characterized in that: Using a flash steam booster device for a high-sulfur gas field as claimed in claim 9, the steps are as follows: S1, the raw gas, i.e., the high-sulfur flash gas, enters from the high-sulfur gas inlet (N1) and is sent to the inlet separator (003) for condensation separation. The separated water is discharged through the inlet separator condensate discharge valve (008) and the condensate discharge manifold (049). At the same time, the high-sulfur flash gas after the water is removed enters the first-stage membrane head (011) for pressurization and is sent to the first-stage cooling exchanger (017); If the pressure is too high during the process of being sent to the first-stage cooling exchanger (017), the safety valve 1 (014) will be activated to discharge the high-pressure gas from the vent (N3); S2. Since the temperature of the high-sulfur gas increases due to the pressurization, the high-sulfur gas is cooled by the primary cooling exchanger (017) and then sent to the primary gas-liquid separator (020) to remove water again. The removed water is discharged through the primary separator condensate discharge valve (025) and the condensate discharge manifold (049). At the same time, the high-sulfur gas after the water is removed enters the secondary membrane head (030) for pressurization and is sent to the secondary cooling exchanger (034); Wherein, the connecting pipe 6 (029) is provided with two sections respectively entering the secondary membrane head (030), so as to evenly disperse the gas entering the secondary membrane head (030) and then pressurizing it, thereby reducing the impact on the pipeline; S3, the high sulfur gas sent to the secondary cooling exchanger (034) enters the secondary gas-liquid separator (037) after cooling; If the pressure is too high during the process of being sent to the secondary cooling exchanger (034), the safety valve 2 (035) will be activated to discharge the high-pressure gas from the vent (N3); S4. In addition to the basic separation of water, the secondary gas-liquid separator (037) also plays the role of filtering impurities, so that the gas can be discharged from the high-sulfur gas outlet (N2). The removed water is discharged through the secondary separator condensate discharge valve (047) and the condensate discharge manifold (049). At the same time, if the gas source pressure is insufficient and is lower than the set value of the pressure transmitter 1 (002), since the pressure cannot form a gas transmission effect, the reflux regulating valve (042) is opened at this time to allow the gas to reflux, thereby driving more high-sulfur gas sent from the high-sulfur gas inlet (N2) to enter the inlet separator (003); The control method of reflux regulation is PID mode. According to the set P\I, the opening of the reflux regulating valve (042) is proportionally opened; after the pressure rises, the reflux regulating valve (042) gradually reduces the opening until it is completely closed.

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