Remote well gas field desulfurization device and method

Abstract

The invention discloses a remote well gas field desulfurization device and method. The desulfurization device comprises a primary purification box, and a first purification assembly is arranged in the primary purification box; the first purification assembly comprises a conical filter element, a rotating disc is arranged below the conical filter element, a buffer disc is arranged in the center of the rotating disc, the lower end face of the buffer disc protrudes out of the lower end face of the rotating disc, and a plurality of air spraying pipes are arranged on the circumferential side wall of the buffer disc; a scraping unit is arranged above the filter element; the scraping unit comprises a fixed barrel, and a piston block and a reset spring located at the bottom of the piston block and the bottom of the fixed barrel are arranged in the fixed barrel; the upper end of the push rod is fixedly connected with the piston block, and the scraping strip is fixed at the bottom end of the push rod and is parallel to the inclined surface of the filter element. The conical filter element structure is used for scraping and cleaning deposited solid impurities, so that the long-term filtering effect of the filter element is ensured, and the running life of the desulfurization device is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas purification, in particular to a remote well gas field desulfurization device and method. Background Art

[0002] There are many methods for natural gas desulfurization, mainly including wet desulfurization technology, dry desulfurization technology (oxidation-reduction method and activated carbon desulfurization process technology), gas membrane separation desulfurization technology, microbial desulfurization technology, etc. According to the actual situation of gas field production, the appropriate desulfurization technology is selected to obtain the best benefits with the least investment, and meet the technical requirements of energy saving and consumption reduction in gas field production. Natural gas contains hydrogen sulfide, mercaptan, heavy hydrocarbon gas, saturated water and other impurities. The hydrogen sulfide in natural gas forms weak acid when it meets water. The presence of weak acid will cause corrosion of steel equipment and pipelines. In addition, if natural gas containing hydrogen sulfide is used as a civilian fuel, the exhaust gas generated after the combustion of natural gas will contain sulfide, which will also pollute the environment and endanger human health.

[0003] In view of the above problems, CN212025280U discloses a desulfurization device for natural gas development, which removes impurities under the action of multiple groups of filter elements. When the natural gas passes through the separation blades, the liquid droplets contained in the natural gas contact with the wire mesh of the separation blades and are separated and fall off from the wire mesh to achieve gas-liquid separation. The natural gas is desulfurized by a combination of physical and chemical methods. Sodium bicarbonate solution is injected into the solution pipeline to perform the first step of desulfurization of the natural gas. In addition, the driving motor drives the stirring blades to rotate to increase the material mixing speed and improve the desulfurization efficiency. In the second step, iron oxide is used to further desulfurize the natural gas to greatly improve the purity of the natural gas. At the same time, activated carbon can adsorb liquids that are not completely separated in the natural gas.

[0004] However, the device uses multiple sets of filter elements when performing preliminary filtration on the fuel gas. Such filter elements are mainly used for filtering solid impurities. If this filtering method cannot remove the impurities attached to the surface of the filter element in time, the air permeability of the filter element will be greatly affected. In addition, when sodium bicarbonate solution is used to perform preliminary absorption of sulfides in the later stage, the mixing effect is not good, which is not conducive to the preliminary absorption of sulfides. Summary of the invention

[0005] The purpose of the present invention is to provide a remote well gas field desulfurization device and method to extend the operation period of the existing remote well gas field desulfurization device. The desulfurization device of the present invention is suitable for all desulfurization processes, especially for remote and dispersed wellheads with poor supporting facilities.

[0006] According to a first aspect of the present invention, the present invention provides a remote well gas field desulfurization device.

[0007] To achieve the above object, the present invention provides the following technical solutions: A remote well gas field desulfurization device comprises a primary purification box for primary purification of fuel gas and a secondary purification box connected to the primary purification box for secondary purification of fuel gas; The upper end (or top) of the preliminary purification box is provided with an air connection conduit for connecting to a gas supply source; the interior of the preliminary purification box is provided with a first purification component for removing impurities from the gas; the air inlet end of the secondary purification box is connected to the exhaust port of the preliminary purification box through a connecting pipe; the upper end (or top) of the secondary purification box is provided with an exhaust pipe for exhausting gas; the interior of the secondary purification box is provided with a second purification component for desulfurizing the fuel gas; A first purification component is provided at the upper part of the preliminary purification box, which is used to remove impurities from the gas; a liquid phase separation unit is provided below the first purification component; Wherein, the first purification component comprises a conical filter element, a rotating disk is provided below the conical filter element, and the rotating disk can drive the conical filter element to rotate horizontally around the center line; a buffer disk is provided at the center of the rotating disk, the lower end surface of the buffer disk protrudes from the lower end surface of the rotating disk, and a plurality of air injection pipes are provided on the circumferential side wall of the buffer disk; The first purification component is provided with a scraper unit; the scraper unit includes: a fixed cylinder fixed to the inner wall of the preliminary purification box: a piston block is provided in the fixed cylinder, and a return spring is located at the bottom of the piston block and the fixed cylinder; a push rod that passes through the bottom of the fixed cylinder and is fixedly connected to the piston block at the upper end, and a scraper strip fixed to the bottom end of the push rod and parallel to the inclined surface of the conical filter element.

[0008] Furthermore, the upper end of the fixed cylinder is open and communicated with the feed gas in the preliminary purification box. The push rod is in sliding connection with the bottom of the fixed cylinder. Preferably, the pressure of the space below the piston block in the fixed cylinder is slightly lower than the feed gas pressure.

[0009] Furthermore, the interior of the conical filter element is preferably a hollow structure. Furthermore, the interior of the conical filter element has a conical cavity. The conical cavity and the conical filter element have a common axis.

[0010] Furthermore, the jet pipes are arranged in an array outside the side wall of the cache disk, and the jet (orifice) direction of the jet pipe is set at an acute angle to the side wall of the cache disk. When the jet pipe sprays gas outward, the cache disk drives the rotating disk to rotate under the action of the reaction force.

[0011] Furthermore, a discharge pipe for discharging slag is provided at the bottom of the preliminary purification box, and a discharge valve is provided on the discharge pipe.

[0012] Furthermore, the liquid phase separation unit adopts a conventional structure in the art. A typical liquid phase separation unit includes a plurality of separation blades, which are compactly fixed in an array state on a rotating shaft horizontally arranged at the lower part of the preliminary purification box, and the rotating shaft can rotate around itself. Furthermore, the separation blades are streamlined or folded; further, the separation blades can be a two-channel or multi-channel structure.

[0013] Furthermore, the preliminary purification box is connected to the lower part of the secondary purification box through a connecting pipe below the liquid phase separation unit. A guide inclined plate is provided above the inlet of the connecting pipe. The guide inclined plate extends downward from the upper part of the connecting pipe inlet to the inside of the preliminary purification box, and the lower end of the guide inclined plate is suspended above the discharge port at the lower part of the preliminary purification box, and the remaining side walls of the guide inclined plate are sealed and connected to the box body of the preliminary purification box.

[0014] Furthermore, the cache disk is arranged opposite to the bottom of the conical cavity.

[0015] Furthermore, the conical filter element is coaxially arranged with the air inlet at the upper end of the preliminary purification box.

[0016] Furthermore, a transmission assembly is provided in the preliminary purification box to connect the rotating disk with the transmission shaft in the liquid phase separation unit, and the transmission assembly can be used to drive the transmission shaft to rotate. The transmission assembly includes a driving wheel connected to the inner wall of the preliminary purification box through a fixed shaft, the surface of the driving wheel is in frictional contact with the lower end surface of the rotating disk, and a driving pulley is coaxially provided on the surface of the driving wheel, and the driving pulley is connected to the driven pulley provided on the crossbar through a belt.

[0017] Furthermore, an exhaust pipe for exhausting exhaust is provided at the upper end (or top) of the secondary purification box.

[0018] Furthermore, the secondary purification box may adopt a conventional structure in the art, such as a second purification component for desulfurizing the fuel gas is provided inside the secondary purification box. A typical structure of the second purification component is as follows: it includes a washing unit located at the lower part of the secondary purification box and a purification unit located above the washing unit, and a plurality of purification layers or purification fillers are provided inside the purification unit.

[0019] Furthermore, the present invention recommends the use of a washing unit with the following structure. The washing unit includes a liquid storage tank, in which a stirring aeration assembly is provided; the stirring aeration assembly includes a horizontally arranged stirring drum with a hollow structure, and a stirring member arranged around and perpendicular to the side wall of the stirring drum; the stirring member includes a stirring tube connected to the stirring drum, a stirring sleeve sleeved outside the stirring tube, and a telescopic spring for connecting the end of the stirring tube is provided in the inner cavity of the stirring sleeve; the stirring sleeve is provided with a first jet hole, and the wall of the stirring tube is provided with a second jet hole, and the first jet hole and the second jet hole are aligned along the radial center of the stirring sleeve and are evenly staggered in sequence. When there is no external force, the first jet hole and the second jet hole are staggered, and the gas cannot be discharged at this time.

[0020] Furthermore, a sealing ring is provided at the end of the stirring sleeve, which is slidably matched with the outer side of the stirring tube, and a pressing wheel is rotatably provided at the end of the stirring sleeve, which is used to press against the bottom of the secondary purification box so that the first jet hole and the second jet hole are connected. When the pressing wheel contacts the bottom of the secondary purification box, the telescopic spring contracts under pressure, and at this time, the first jet hole and the second jet hole are located opposite to each other, and the gas is bubbled and sprayed through the second jet hole and the first jet hole, and mixed with the sodium bicarbonate washing liquid for mass transfer.

[0021] Furthermore, the purification unit includes a first purification block and a second purification block in order from bottom to top. The first purification block is provided with a first purification filling layer, and the second purification block is provided with a second purification filling layer. The first purification block and the second purification block are designed to be removable and replaceable structures, that is, the purification block and the purification filling layer therein can be withdrawn and replaced from the secondary purification box as a whole.

[0022] Furthermore, the washing section unit of the secondary purification box is provided with a sodium bicarbonate solution pool for washing the gas. Preferably, the left end of the mixing drum is rotatably connected to the discharge end of the connecting pipe, and the right end of the mixing drum is fixedly connected to the driving motor.

[0023] Furthermore, a one-way valve is provided at the air jet hole on the surface of the mixing drum to prevent the washing liquid from flowing back into the mixing tube.

[0024] According to a second aspect of the present invention, the present invention also provides a remote well gas field desulfurization method, wherein the well gas field desulfurization device described above is applied.

[0025] Furthermore, the well gas field desulfurization method comprises the following contents: (1) Natural gas enters the preliminary purification box through the gas inlet pipe and flows through the conical filter element to perform preliminary impurity removal on the gas. The removed solid impurities will remain on the surface of the filter element column; (2) The gas passing through the filter element in step (1) passes through the jet pipe of the buffer disk, and under the action of the reaction force, the buffer disk drives the rotating disk to rotate; (3) When impurities accumulate seriously on the surface of the filter cartridge, the air pressure inside the preliminary purification box increases. Under the action of the air pressure, the piston block will slide downward along the fixed cylinder, driving the scraper strip at the lower end of the push rod to press against the surface of the filter cartridge, scraping away the impurities on the surface of the filter cartridge; (4) The gas entering the liquid phase separation unit, after the liquid is separated, enters the washing unit of the secondary purification box; (5) The gas washed by the washing unit flows upward through the first purification block and the second purification block in sequence, contacts with the filling purification layer therein, removes the residual hydrogen sulfide, and the obtained purified gas is discharged from the secondary purification unit.

[0026] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is designed to solve the existing problems. When impurities accumulate on the surface of the filter element and affect the ventilation effect, the pressure on the surface of the piston block in the scraper unit exceeds the elastic force of the spring, driving the push rod to move downward, thereby driving the scraper bar to contact the surface of the conical filter element. Driven by the rotating disk, the impurities accumulated on the surface of the filter element are scraped off by the scraper bar, and the impurities retained on the surface of the filter element are cleaned, thereby ensuring the long-term filtering effect of the filter element. At the same time, the conical structure can be used to collect impurities in time and discharge them out of the preliminary purification box.

[0027] 2. In the desulfurization device of the present invention, the washing unit of the secondary purification box preferably adopts a specially designed stirring drum structure. The mixing effect of the gas and the washing liquid is improved by setting a stirring member. During the mixing, the gas can be discharged only when the stirring member is at the bottom of the washing tank, which ensures the washing time; while washing, the stirring member can also disperse the floating gas microbubbles, further improving the gas-liquid mixing effect, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the desulfurization device of the present invention.

[0029] Figure 2 It is a schematic diagram of the internal structure of the desulfurization device of the present invention.

[0030] Figure 3 It is a schematic diagram of the structure of the stirring element in the desulfurization device of the present invention.

[0031] Figure 4 It is a schematic diagram of the structure of the first purification unit in the desulfurization device of the present invention.

[0032] Among them: 11-preliminary purification box, 12-air duct, 13-sound insulation layer, 14-piston block, 15-reset spring, 16-fixed cylinder, 17-push rod, 18-scraper strip, 19-discharge duct, 20-storage box, 21-driving wheel, 22-transmission belt, 23-separation blade, 24-guide inclined plate, 25-connecting pipe, 26-stirring member, 27-stirring drum, 28-driving motor, 29-first purification filling layer, 30-first purification block, 31-cache disk, 32-jet pipe, 33-rotating disk, 34-filter column, 35-second purification filling layer, 36-second purification block, 37-secondary purification box; 38-stirring tube, 39-sealing ring, 40-stirring sleeve, 41-first jet hole, 42-second jet hole, 43-pressure wheel, 44-telescopic spring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Combination Figure 1-4 A remote well gas field desulfurization device according to an embodiment of the present invention comprises a preliminary purification box 11 for preliminary purification of gas and a secondary purification box 37 connected to the preliminary purification box 11 for secondary purification of gas. The upper end of the preliminary purification box 11 is provided with a gas connection conduit 12 for connecting to a gas supply source, and the interior of the preliminary purification box 11 is provided with a first purification component for removing impurities from the gas. The air inlet end on the lower left side of the secondary purification box 37 is connected to the exhaust port on the lower right side of the preliminary purification box 11 through a connecting pipe 25. The upper end of the secondary purification box 37 is provided with an exhaust pipe for exhaust, and the interior of the secondary purification box 37 is provided with a second purification component for desulfurization of the gas. When in use, the gas enters the interior of the preliminary purification box 11 along the gas connection conduit 12 for preliminary purification, and the gas after preliminary purification enters the secondary purification box 37 along the connecting pipe 25, thereby completing the secondary purification of the gas.

[0035] The first purification component includes a rotating disk 33 rotatably arranged inside the preliminary purification box 11, an opening is provided in the middle of the rotating disk 33, and a cache disk 31 for caching gas is provided on the lower side of the opening, and a plurality of jet pipes 32 for exhaust are distributed in an array on the outer side of the cache disk 31, and the jet direction of the jet pipe 32 is set at an acute angle to the outer cross-section of the cache disk 31. When the jet pipe 32 sprays gas, the cache disk 31 will drive the rotating disk 33 to rotate under the action of the reaction force.

[0036] A filter column 34 for solid impurity removal is installed above the rotating disk 33. The filter column 34 is of a conical structure. Preferably, the filter column 34 is coaxially arranged with the air inlet at the upper end of the preliminary purification box 11. The preliminary purification box 11 is also provided with a scraper for timely scraping away impurities on the surface of the filter column 34.

[0037] The scraper includes a discharge conduit 19 arranged on the left side of the preliminary purification box 11, the outer end of the discharge conduit 19 is connected to a storage box 20 arranged outside the preliminary purification box 11, and a movable door for taking materials is provided on the storage box 20. The scraper also includes a fixed cylinder 16 arranged at the top of the preliminary purification box 11, a piston block 14 is provided in the fixed cylinder 16 for sliding cooperation, the lower end of the piston block 14 is connected and fixed to the bottom of the fixed cylinder 16 through a return spring 15, a push rod 17 extending out of the bottom plate of the fixed cylinder 16 is provided at the lower end of the piston block 14, a scraper strip 18 corresponding to the surface of the filter element column 34 is provided at the lower end of the push rod 17, a connecting port communicating with the inside of the preliminary purification box 11 is provided at the outer side of the upper end of the fixed cylinder 16, an external through pipe extending out of the left side wall of the preliminary purification box 11 is provided at the lower left side of the fixed cylinder 16, and the displacement stroke of the piston block 14 is between the outer cylinder tube and the connecting port.

[0038] When impurities accumulate seriously on the surface of the filter column 34, the ventilation effect of the filter column 34 is poor. At this time, the internal air pressure of the preliminary purification box 11 is large enough. Under the action of the gas pressure, the piston block 14 will slide downward along the inner wall of the fixed cylinder 16. Driven by the piston block 14, the push rod 17 will drive the scraper 18 to press against the surface of the filter column 34, thereby scraping away the impurities on the surface of the filter column 34. Under the guidance of the conical surface, the impurities will enter the storage box 20 along the discharge conduit 19. A throttle valve is provided on the discharge conduit 19. When cleaning the impurities in the storage box 20 at a later stage, the throttle valve can be closed. This cleaning method is self-adjusted according to its own internal ventilation effect, does not require manual intervention, and is highly practical.

[0039] A cross bar is rotatably provided inside the preliminary purification box 11 below the rotating disk 33, and a plurality of separation blades 23 are distributed in an array on the cross bar. A transmission assembly is provided inside the preliminary purification box 11 to connect the rotating disk 33 with the cross bar. The transmission assembly is used to drive the cross bar to rotate, so that the separation blades 23 rotate continuously, so that the separation blades 23 are fully in contact with the airflow, thereby improving the impurity removal effect.

[0040] Preferably, a guide inclined plate 24 for guiding the flow of air is provided inside the preliminary purification box 11 near the connecting pipe 25. The guide inclined plate 24 can be used to prolong the time that the airflow stays inside the preliminary purification box 11, and at the same time prevent the airflow from short-circuiting and directly entering the secondary purification box without contacting the separation blades, so as to ensure the dehydration effect of the desulfurization device.

[0041] The transmission assembly includes a driving wheel 21 rotatably arranged on the inner wall of the preliminary purification box 11, the surface of the driving wheel 21 is in frictional contact with the lower end of the rotating disk 33, and a driving pulley is coaxially arranged on the surface of the driving wheel 21, and the driving pulley is connected to the driven pulley on the cross bar through the transmission belt 22, so that when the rotating disk 33 rotates, the driving pulley drives the cross bar to rotate through the transmission belt 22, thereby improving the condensation effect of the gas, and the hot gas encounters the separation blades 23 with lower temperature, and the droplets (or droplets) carried in the gas will condense and liquefy due to the collision with the blades, thereby removing water and impurities from the gas. A discharge pipe for slag discharge is provided at the bottom of the preliminary purification box 11, and a discharge valve is provided on the discharge pipe.

[0042] The outer side of the preliminary purification box 11 is wrapped with a sound insulation layer 13 for sound insulation.

[0043] The second purification assembly comprises a washing unit located at the lower part of the secondary purification box and a purification unit located above the washing unit. A plurality of purification filling layers or purification fillers are arranged in the purification unit.

[0044] The purification unit includes, from bottom to top, a first purification block 30 and a second purification block 36 which are slidably arranged outside the secondary purification box 37. A first purification filling layer 29 for desulfurization is arranged inside the first purification block 30, and a second purification filling layer 35 for desulfurization is arranged inside the second purification block 36. Both the first purification block and the second purification block are arranged in the form of drawers, which can better facilitate the later extraction and replacement.

[0045] The washing unit includes a mixing drum 27 placed horizontally inside a secondary purification box 37. A washing liquid (such as sodium bicarbonate solution) pool (or liquid storage tank) for washing the gas is provided at the bottom of the secondary purification box 37 where the mixing drum 27 is located. The left end of the mixing drum 27 is rotatably connected to the discharge end of the connecting pipe 25, and the right end of the mixing drum 27 is connected to a driving motor 28 for driving the mixing drum 27 to rotate. A plurality of stirring members 26 for quickly mixing the gas and the sodium bicarbonate solution are arranged in an array outside the mixing drum 27, and the stirring members 26 correspond to the positions of the jet ports on the surface of the mixing drum 27. A one-way valve is provided at the jet port position on the surface of the mixing drum 27. Driven by the driving motor 28, the mixing drum 27 drives the stirring member 26 to rotate, thereby quickly mixing the gas and the sodium bicarbonate solution.

[0046] The stirring member 26 includes a stirring tube 38 connected to the jet port of the stirring drum 27, and the inner cavity of the stirring tube 38 is connected to the inner cavity of the stirring drum 27. A stirring sleeve 40 is provided on the sliding sleeve of the stirring tube 38, and a plurality of first jet holes 41 for jetting are provided on the outer side of the stirring sleeve 40, and a plurality of second jet holes 42 are distributed on the surface of the stirring tube 38, and the positions of the first jet holes 41 correspond to the second jet holes 42. A telescopic spring 44 for connecting the stirring tube 38 is provided in the inner cavity of the stirring sleeve 40. Under the action of the telescopic spring 44, the first jet hole 41 and the second jet hole 42 on the stirring sleeve 40 are staggered, and the gas cannot be discharged at this time. A sealing ring 39 that slides with the outer side of the stirring tube 38 is provided at the end of the stirring sleeve 40, and a pressing wheel 43 is provided at the end of the stirring sleeve 40 for pressing and contacting with the bottom of the secondary purification box 37 so that the first jet hole 41 and the second jet hole 42 are connected.

[0047] As the mixing drum 27 rotates, when the stirring member 26 rotates downward, the pressing wheel 43 will press and contact with the bottom of the secondary purification box 37, so that under the action of pressure, the stirring tube 38 will be retracted into the stirring sleeve 40. At this time, the first jet hole 41 is connected with the second jet hole 42, and the gas inside the stirring tube 38 can be discharged, so that it can be ensured that each time the gas is ejected, it is at the bottom of the sodium bicarbonate solution pool, which prolongs the contact time between the gas and the solution and improves the purification effect. In addition, the stirring member 26 can also promote the further contact between the upwelling gas and the solution when rotating.

[0048] A drain pipe for discharging the solution is provided at the lower right side of the secondary purification box 37, and a drain valve is provided on the drain pipe.

[0049] Combination Figure 1-4 The working principle of the desulfurization device of the present invention is as follows: During actual use, the gas receiving conduit 12 is connected to the gas source, and the gas will enter the preliminary purification box 11 along the gas receiving conduit 12, and the filter column 34 will perform preliminary impurity removal on the gas, and most of the solid impurities will be retained on the surface of the filter column 34; when the gas is ejected from the jet pipe 32, the buffer disk 31 will drive the rotating disk 33 to rotate under the action of the reaction force; when the impurities on the surface of the filter column 34 are seriously accumulated, the air permeability of the filter column 34 is not good, and the air pressure inside the preliminary purification box 11 is large enough at this time; under the action of the air pressure, the piston block 14 will slide downward along the inner wall of the fixed cylinder 16, and under the drive of the piston block 14, the push rod 17 will drive the scraper strip 18 to press The surface of the filter column 34 is scraped away, and under the guidance of the conical surface, the impurities will enter the storage box 20 along the discharge conduit 19, and then the liquid impurities carried in the fuel gas will gather and condense on the separation blades 23, thereby completing the first purification. The purified fuel gas will enter the secondary purification box 37, and then flow through the washing unit, the purification unit (the first purification block and the second purification block) in sequence. The iron oxide in the first purification block absorbs sulfur by utilizing the reducing property of sulfide, and the activated carbon in the second purification block has strong adsorption capacity, which can perform the final purification of the fuel gas. The washing unit uses sodium bicarbonate solution to wash the fuel gas.

[0050] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A remote well gas field desulfurization device, comprising a primary purification box for primary purification of fuel gas and a secondary purification box connected to the primary purification box for secondary purification of fuel gas; The upper end of the primary purification box is provided with an air connection conduit for connecting to a gas supply source; the interior of the primary purification box is provided with a first purification component for removing impurities from the gas; the air inlet end of the secondary purification box is connected to the exhaust port of the primary purification box through a connecting pipe; the upper end of the secondary purification box is provided with an exhaust pipe for exhausting gas; the interior of the secondary purification box is provided with a second purification component for desulfurizing the fuel gas; A first purification component is provided at the upper part of the preliminary purification box, which is used to remove impurities from the gas; a liquid phase separation unit is provided below the first purification component; in, The first purification component includes a conical filter element, a rotating disk is provided below the conical filter element, and the rotating disk can drive the conical filter element to rotate horizontally around the center line; a buffer disk is provided at the center of the rotating disk, the lower end surface of the buffer disk protrudes from the lower end surface of the rotating disk, and a plurality of air injection pipes are provided on the circumferential side wall of the buffer disk; The first purification component is provided with a scraper unit; the scraper unit includes: a fixed cylinder fixed to the inner wall of the preliminary purification box: a piston block is provided in the fixed cylinder, and a return spring is located at the bottom of the piston block and the fixed cylinder; a push rod that passes through the bottom of the fixed cylinder and is fixedly connected to the piston block at the upper end, and a scraper strip fixed to the bottom end of the push rod and parallel to the inclined surface of the conical filter element.

2. The desulfurization device according to claim 1, characterized in that: The upper end of the fixed cylinder is open and communicated with the feed gas in the preliminary purification box, and the push rod is in sliding connection with the bottom of the fixed cylinder.

3. The desulfurization device according to claim 1, characterized in that: The interior of the conical filter element is preferably a hollow structure; preferably, the interior of the conical filter element has a conical cavity; the conical cavity and the conical filter element have a common axis.

4. The desulfurization device according to claim 1, characterized in that: The air jets are distributed in an array outside the side wall of the cache disk, and the air jet directions of the air jets are arranged at an acute angle to the section of the side wall of the cache disk.

5. The desulfurization device according to claim 1, characterized in that: A discharge pipe for discharging slag is provided at the bottom of the first purification component, and a discharge valve is provided on the discharge pipe.

6. The desulfurization device according to claim 1, characterized in that: The first purification component and the liquid phase separation unit are separated by a rotating disk and a buffer disk.

7. The desulfurization device according to claim 1, characterized in that: The liquid phase separation unit comprises a plurality of separation blades, which are fixed in an array state on a rotating shaft horizontally arranged at the lower part of the preliminary purification box, and the rotating shaft can rotate around itself.

8. The desulfurization device according to claim 3, characterized in that: The buffer disk is arranged opposite to the bottom of the conical cavity.

9. The desulfurization device according to claim 1, characterized in that: The conical filter element is coaxially arranged with the air inlet at the upper end of the preliminary purification box.

10. The desulfurization device according to claim 1, characterized in that: The preliminary purification box is provided with a transmission assembly that connects the rotating disk with the transmission shaft in the liquid phase separation unit; preferably, the transmission assembly includes a driving wheel connected to the inner wall of the preliminary purification box through a fixed shaft, the driving wheel surface is in frictional contact with the lower end surface of the rotating disk, and a driving pulley is coaxially provided on the driving wheel surface, and the driving pulley is connected to the driven pulley arranged on the cross bar through a belt.

11. The desulfurization device according to claim 1, characterized in that: The second purification component comprises a washing unit located at the bottom and a purification unit located above the washing unit. A plurality of purification layers or purification fillers are arranged in the purification unit.

12. The desulfurization device according to claim 11, characterized in that: The washing unit comprises a liquid storage tank, in which a stirring aeration component is arranged.

13. The desulfurization device according to claim 12, characterized in that: The stirring aeration assembly comprises a horizontally arranged stirring drum with a hollow structure, and a stirring piece longitudinally arranged around and perpendicular to the side of the stirring drum; the stirring piece comprises a stirring tube connected to the stirring drum, and a stirring sleeve sleeved outside the stirring tube, wherein a telescopic spring for connecting the end of the stirring tube is arranged in the inner cavity of the stirring sleeve; the stirring sleeve is provided with a first jet hole, and a second jet hole is provided on the wall of the stirring tube, the first jet hole and the second jet hole are aligned along the radial center of the stirring sleeve and are naturally staggered, and when no external force is applied, the first jet hole and the second jet hole are staggered.

14. The desulfurization device according to claim 13, characterized in that: The end of the stirring sleeve is provided with a sealing ring that is slidably matched with the outer side of the stirring tube, and the end of the stirring sleeve is rotatably provided with a pressing wheel that is used for pressing and contacting with the bottom of the liquid storage tank to connect the first jet hole and the second jet hole.

15. The desulfurization device according to claim 11, characterized in that: The purification unit comprises a first purification block and a second purification block in order from bottom to top; a first purification filling layer is arranged in the first purification block, and a second purification filling layer is arranged in the second purification block.

16. The desulfurization device according to claim 15, characterized in that: The first purification block and the second purification block are extractable and replaceable structures.

17. The desulfurization device according to claim 1, characterized in that: The left end of the mixing drum is rotatably connected to the discharge end of the connecting pipe, and the right end of the mixing drum is fixedly connected to the driving motor.

18. A method for desulfurization of a remote well gas field, characterized in that: The desulfurization device according to any one of claims 1 to 17 is applied.

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