A drying device for natural gas liquefaction pretreatment

Abstract

This invention discloses a drying device for natural gas liquefaction pretreatment, including a drying chamber. An input pipe is installed on one side of the drying chamber, and an output pipe is installed on the other side. A detachment component is installed inside the drying chamber near the output end of the input pipe. A collection component is installed at the bottom of the detachment component, and a filter component is installed at the top of the detachment component. A partition is installed on one side of the detachment component and the filter component. An output channel is provided on the upper side of the partition, and the input end of the output channel is connected to the output end of the filter component. A recovery channel is provided on the lower side of the partition. A flow guide is installed on one side of the partition and the output channel. A transfer pipe is connected to the output end of the flow guide. A condensation mechanism is connected to the top output end of the transfer pipe. A guide flow channel is connected to the output end of the condensation mechanism. Several output ports are provided on the lower side of the guide flow channel. An adsorption component is installed between the sealing plate and the output pipe in the drying chamber.

Description

Technical Field

[0001] This invention belongs to the field of coke oven gas treatment technology, specifically relating to a drying device for natural gas liquefaction pretreatment. Background Technology

[0002] Natural gas, produced from coke oven gas through reforming, is an important gas source for industrial fuel, chemical synthesis, and clean energy utilization. Compared to natural gas produced by traditional coal coking, the natural gas obtained from coke oven gas reforming has more controllable composition and fewer basic impurities, offering advantages in large-scale production and clean supply. It is widely used in industrial production, fine chemicals, and residential energy supply. After reforming coke oven gas into natural gas, liquefaction is the core technology for achieving long-distance storage, low-cost transportation, and high-value utilization of natural gas. Before liquefying coke oven gas, a pretreatment drying process must be completed. If residual moisture remains in the reformed natural gas feedstock, it is highly susceptible to condensation and freezing under low-temperature liquefaction conditions. This not only clogs liquefaction equipment pipelines, valves, and heat exchange components, causing obstructed flow and reduced heat exchange efficiency, but also disrupts the overall operational stability of the liquefaction system.

[0003] Currently, the industry's pretreatment drying operations for liquefaction of natural gas obtained from coke oven gas reforming mostly rely on traditional physical separation methods to remove moisture from the gas, thus achieving the required drying standards for basic liquefaction gas intake. However, in actual production applications, during the natural gas reforming reaction process and subsequent gathering, buffering, and transportation processes, the reformed natural gas contains not only free water and gaseous water but also small amounts of dust, reaction residues, colloidal polymers, and other solid and light impurities. Existing drying equipment often focuses solely on moisture removal and lacks targeted impurity pretreatment filtration structures, failing to effectively trap various trace impurities in the natural gas. These impurities, carried by the gas flow, enter the drying equipment and subsequent liquefaction equipment, continuously adhering and accumulating on the drying components, the inner walls of the liquefaction equipment, and the surfaces of the heat exchange structures. Over long-term operation, this leads to blockage of functional components, wear and corrosion of the equipment's inner walls, and significantly reduces the service life of the drying and liquefaction equipment.

[0004] Secondly, most of the existing mainstream drying equipment adapted to natural gas adopts a cooling drying mode. By creating a low-temperature operating environment, the gaseous moisture contained in the natural gas is condensed into liquid water, thereby achieving water-gas separation and gas drying. However, in the continuous industrial cooling drying process, the existing equipment does not have an immediate and thorough drainage function, and cannot discharge the liquid water that is precipitated during cooling in a timely manner. The precipitated liquid water is very easy to remain and accumulate inside the equipment cavity, and under the action of airflow disturbance and temperature fluctuation, it will undergo secondary volatilization and re-mix into the already dried natural gas flow, causing the gas to become damp again.

[0005] Therefore, there is an urgent need for a drying device for natural gas liquefaction pretreatment to solve the above problems. Summary of the Invention

[0006] In view of the problems mentioned in the background art above, the object of the present invention is to provide a drying device for natural gas liquefaction pretreatment.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows: A drying device for natural gas liquefaction pretreatment includes a drying chamber. An inlet pipe is installed on one side of the drying chamber, and an outlet pipe is installed on the other side. A detachment assembly is installed inside the drying chamber near the outlet end of the inlet pipe. A collection assembly is installed at the bottom of the detachment assembly, and a filter assembly is installed on top of the detachment assembly. The outlet end of the detachment assembly is connected to the inlet end of the filter assembly. A partition is installed on one side of the detachment assembly and the filter assembly. An outlet channel is provided on the upper side of the partition, and the inlet end of the outlet channel is connected to the outlet end of the filter assembly. A recycling channel is provided on the lower side, and the output end of the recycling channel is located on the top side of the collection component. A flow guide hood is installed on one side of the output channel. The lower side of the flow guide hood is connected to the input end of the recycling channel. The output end of the flow guide hood is connected to a transfer pipe. The top output end of the transfer pipe is connected to a condensation mechanism. The output end of the condensation mechanism is connected to a guide channel. A sealing plate is installed between the condensation mechanism and the guide channel in the drying chamber. Several output ports are provided on the lower side of the guide channel. An adsorption component is installed between the sealing plate and the output pipe in the drying chamber. The adsorption component is located between the output port and the output pipe.

[0008] Further specifying, the separation assembly includes several alternately arranged upper and lower baffles, both of which are inclined. A flow channel is formed between adjacent upper and lower baffles. A support plate is mounted on the top of each of the upper baffles. One side of the support plate is installed inside a drying chamber, and the other side of the support plate forms an output flow channel with a partition. The lower baffles are mounted on a collection assembly. This structural design allows for the separation of water vapor from the gas.

[0009] Further specifying, the collection assembly includes a collection box installed at the bottom of the drying chamber, a perforated plate installed on the top of the collection box, the perforated plate installed at the bottom of the drying chamber, a lower baffle plate installed on the perforated plate, and collecting seats installed on both sides inside the collection box. A drain pipe is installed at the convergence point of the collecting seats on both sides of the collection box. This structural design allows for the collection of liquid formed after the water vapor has separated.

[0010] Further specifying, the filter assembly includes a filter element housing with a U-shaped structure. A filter partition plate is provided inside the filter element housing. One side of the filter partition plate is fixedly mounted on a partition, and the other side of the filter partition plate forms a guide channel with the inner side of the filter element housing. The filter partition plate divides the internal space of the filter element housing into two parts, forming a lower filter channel and an upper filter channel. A first filter element is installed in the lower filter channel, and the input end of the lower filter channel is located above the output channel. A second filter element is installed in the upper filter channel, and the output end of the upper filter channel is located at the input end of the output channel. This structural design can filter impurities in the gas.

[0011] Furthermore, a lifting plate is installed on the outer side of the filter element housing, and the lifting plate is installed on the outside of the drying chamber. A sealing gasket is installed at the connection between the lifting plate and the drying chamber. The filter element housing is slidably mounted on the top of the support plate and the top of the inner side of the drying chamber. This structural design facilitates the disassembly of the filter element housing for maintenance and replacement of the internal first and second filter elements.

[0012] Furthermore, the upper inner side of the flow guide shroud is provided with a gas guiding surface running from left to right and from top to bottom, and the lower inner side of the flow guide shroud is provided with a liquid guiding surface running from right to left and from top to bottom. The bottom of the liquid guiding surface is connected to the recovery channel. This structural design facilitates the guidance of gas and liquid.

[0013] Further specifying, the condensation mechanism includes a condensation chamber, inside which are installed several condensing pipes. The output end of the transfer pipe is installed at the bottom of the condensation chamber. Guide seats are installed on both sides of the interior of the condensation chamber. An outlet pipe is installed on one side of the top of the condensation chamber, and the outlet pipe is installed inside a sealing plate. The output end of the outlet pipe is connected to the input end of the guide channel. This structural design allows the condensing pipes to come into contact with the humid natural gas, cooling the humid gas below its dew point, thereby causing the moisture in the humid gas to condense into water droplets, thus condensing the moisture into a liquid state.

[0014] Furthermore, a right-angle mounting base is installed on one side of the bottom of the condenser, and the bottom of the right-angle mounting base is mounted on the flow guide shroud. A support base is installed on the other side of the bottom of the condenser, and the support base is mounted on the side wall of the sealing plate. This structural design facilitates the installation and use of the condenser.

[0015] Furthermore, the guide channel is provided with a vertically downward airflow passage, and several of the outlets are located on the lower outer side of the guide channel. This structural design facilitates the guiding and conveying of gas for subsequent adsorption.

[0016] Further specifying, the adsorption component includes a support substrate with a plurality of uniformly arranged mesh holes on its upper and lower sides, and a support cavity within the support substrate filled with 3A molecular sieve adsorbent. This structural design allows for deep drying of natural gas.

[0017] The beneficial effects of this invention are as follows: By setting up a pretreatment structure consisting of a separation component and a two-stage filtration component, the natural gas to be treated first passes through a baffle structure to remove large-particle liquid water, and then passes through two-stage filter elements to remove large-diameter solid particles, fine dust impurities, and mist droplets step by step. This can comprehensively intercept solid and light impurities such as dust, rock fragments, and colloids carried in the natural gas, which can prevent impurities from entering the subsequent drying components and liquefaction equipment with the airflow and causing blockage and wear problems, thus helping to extend the service life of the equipment. At the same time, it eliminates the interference of impurities on the water separation process, ensuring stable water separation effect. Through the condensation mechanism, the natural gas is rapidly cooled to below the dew point temperature by fully contacting and exchanging heat with the wet natural gas, causing the saturated water vapor in the gas to condense into liquid water droplets. The condensed droplets fall along the outer wall of the condenser tube by gravity and flow back to the guide hood through the bottom transfer pipe, further ensuring stable drying quality. Finally, the adsorption component can achieve deep drying of the natural gas, ensuring that the drying indicators meet the liquefaction pretreatment requirements, which is conducive to improving the purity of the finished product of subsequent natural gas liquefaction. Attached Figure Description

[0018] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings; Figure 1 This is a schematic diagram of the axial side structure of a drying device for natural gas liquefaction pretreatment according to an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of a drying device for natural gas liquefaction pretreatment according to an embodiment of the present invention; The symbols for the main components are explained below: 1. Drying oven; 2. Inlet pipe; 3. Outlet pipe; 4. Detachment assembly; 5. Collection assembly; 6. Filter assembly; 7. Baffle plate; 8. Output channel; 9. Recovery channel; 10. Flow guide hood; 11. Transfer pipe; 12. Condensation mechanism; 13. Guide channel; 14. Sealing plate; 15. Outlet port; 16. Adsorption assembly; 17. Upper baffle plate; 18. Lower baffle plate; 19. Flow channel; 20. Support plate; 21. Output channel; 22. Collection box; 23. Mesh plate; 24. Collection seat; 25. Drain pipe. Filter cartridge housing 26, filter separator plate 27, guide channel 28, lower filter channel 29, upper filter channel 30, first filter element 31, second filter element 32, lifting plate 33, sealing gasket 34, gas guide surface 35, liquid guide surface 36, condenser box 37, condenser pipe 38, guide seat 39, gas outlet pipe 40, right angle mounting seat 41, support seat 42, airflow channel 43, bearing substrate 44, mesh 45, bearing cavity 46, 3A molecular sieve adsorbent 47. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Example 1, such as Figure 1 and Figure 2 As shown, a drying device for natural gas liquefaction pretreatment includes an input pipe 2 installed on one side of a drying chamber 1, and an output pipe 3 installed on the other side. Inside the drying chamber 1, near the output end of the input pipe 2, a detachment assembly 4 is installed. A collection assembly 5 is installed at the bottom of the detachment assembly 4, and a filter assembly 6 is installed at the top of the detachment assembly 4. The output end of the detachment assembly 4 is connected to the input end of the filter assembly 6. A partition 7 is installed on one side of the detachment assembly 4 and the filter assembly 6. An output channel 8 is provided on the upper side of the partition 7, and the input end of the output channel 8 is connected to the output end of the filter assembly 6. A recovery channel 9 is provided on the lower side of the partition 7. The output end of the collection channel 9 is located on the top side of the collection assembly 5. A guide hood 10 is installed on one side of the output channel 8 on the partition 7. The lower side of the guide hood 10 is connected to the input end of the collection channel 9. The output end of the guide hood 10 is connected to the transfer pipe 11. The top output end of the transfer pipe 11 is connected to the condensation mechanism 12. The output end of the condensation mechanism 12 is connected to the guide channel 13. A sealing plate 14 is installed between the condensation mechanism 12 and the guide channel 13 in the drying chamber 1. Several output ports 15 are provided on the lower side of the guide channel 13. An adsorption assembly 16 is installed between the sealing plate 14 and the output pipe 3 in the drying chamber 1. The adsorption assembly 16 is located between the output port 15 and the output pipe 3.

[0021] In this embodiment, the wet natural gas to be dried is sent into the drying chamber 1 through the input pipe 2. It first enters the separation component 4, where large particles of liquid water and some water vapor carried in the gas are separated and removed. The condensed liquid falls into the collection component 5 at the bottom for collection. The natural gas with large droplets removed enters the filtration component 6. After two stages of filtration, solid impurities and fine mist droplets in the gas are removed step by step. The purified gas enters the guide hood 10 through the output channel 8 on the upper side of the partition 7. After the gas-liquid initial separation is completed in the guide hood 10, the gas is sent to the condensation mechanism 12 through the transfer pipe 11. The natural gas is cooled to below the dew point through low-temperature heat exchange, causing the remaining water vapor to condense into liquid. The condensate flows back to the recovery channel 9 along the pipeline and flows into the collection component 5. The cooled and dehydrated natural gas is evenly dispersed through the guide channel 13 and sent to the adsorption component 16. The residual trace moisture is deeply removed by the 3A molecular sieve adsorbent. Finally, the natural gas that meets the drying standard is discharged from the output pipe 3, completing the drying pretreatment before natural gas liquefaction.

[0022] Example 2, as Figure 2As shown, this embodiment adds the following structure to the embodiment 1: the detachment component 4 includes several alternately arranged upper baffles 17 and lower baffles 18, both of which are inclined. A flow channel 19 is formed between two adjacent upper baffles 17 and lower baffles 18. A support plate 20 is installed on the top of several upper baffles 17. One side of the support plate 20 is installed inside the drying chamber 1, and the other side of the support plate 20 forms an output flow channel 21 between it and the partition 7. Several lower baffles 18 are installed on the collection component 5.

[0023] In this embodiment, the moist natural gas enters the drying chamber 1 through the input pipe 2 and then enters the flow channel 19, which is composed of the upper baffle 17 and the lower baffle 18 arranged alternately. The airflow repeatedly changes its flow direction in the flow channel 19. Due to inertia, the water vapor and liquid water droplets in the gas continuously collide with the inclined plate surfaces of the upper baffle 17 and the lower baffle 18 and condense and adhere. The condensed droplets slide down the inclined plate surface by gravity and fall into the collection component 5 below. The gas with large droplets removed is transported forward along the flow channel 19 and guided upward through the output channel 21 between the support plate 20 and the partition plate 7 to the input end of the filter component 6.

[0024] Example 3, as Figure 2 As shown, this embodiment adds the following structure based on embodiment 1: the collection component 5 includes a collection box 22 installed at the bottom of the drying box 1, a perforated plate 23 installed on the top of the collection box 22, the perforated plate 23 installed at the bottom of the drying box 1, a lower baffle plate 18 installed on the perforated plate 23, and collection seats 24 installed on both sides inside the collection box 22. A drain pipe 25 is installed at the collection point of the collection seats 24 on both sides of the collection box 22.

[0025] In this embodiment, the liquid water condensed in the detachment component 4 slides down the inclined surface of the lower baffle plate 18, passes through the holes of the mesh plate 23 and falls into the collection box 22 below. The liquid entering the collection box 22 flows and converges towards the central collection point along the guide slopes of the two side collection seats 24, and finally concentrates at the position of the drain pipe 25. The collected liquid water can be periodically discharged out through the drain pipe 25. The mesh plate 23 also supports the lower baffle plate 18, separates the gas and liquid space, and prevents the accumulated liquid from being disturbed by the airflow and re-vaporized or entrained.

[0026] Example 4, as Figure 2As shown, this embodiment adds the following structure based on embodiment 1: the filter assembly 6 includes a filter element housing 26, which is U-shaped. A filter partition plate 27 is provided inside the filter element housing 26. One side of the filter partition plate 27 is fixedly installed on the partition plate 7, and the other side of the filter partition plate 27 forms a guide channel 28 with the inner side of the filter element housing 26. The filter partition plate 27 divides the internal space of the filter element housing 26 into two parts to form a lower filter channel 29 and an upper filter channel 30. A first filter element 31 is installed in the lower filter channel 29, and the input end of the lower filter channel 29 is located above the output channel 21. A second filter element 32 is installed in the upper filter channel 30, and the output end of the upper filter channel 30 is located at the input end of the output channel 8.

[0027] In this embodiment, the natural gas pretreated by the separation component 4 enters the lower filtration channel 29 of the U-shaped filter housing 26 through the output channel 21. It first flows through the first filter element 31 to remove large-diameter solid particles and some fine droplets from the gas. Then, the gas is turned through the guide channel 28 between the end of the filter partition plate 27 and the inner wall of the filter housing 26 and enters the upper filtration channel 30. It flows through the second filter element 32 for secondary fine filtration to further remove finer dust impurities and mist droplets. The natural gas, which has completed two-stage filtration and purification, flows out from the output end of the upper filtration channel 30 and enters the output channel 8 on the upper side of the partition plate 7.

[0028] Example 5, as Figure 2 As shown, this embodiment adds the following structure based on embodiment 4: a lifting plate 33 is installed on the outside of the filter element housing 26, the lifting plate 33 is installed on the outside of the drying chamber 1, a sealing gasket 34 is installed at the connection between the lifting plate 33 and the drying chamber 1, and the filter element housing 26 is slidably installed on the top of the support plate 20 and the top of the inner side of the drying chamber 1.

[0029] In this embodiment, the filter element housing 26 is suspended from the side wall of the drying chamber 1 by the outer lifting plate 33. The entire housing can be horizontally pulled out along the sliding mating surface between the top of the support plate 20 and the top of the inner side of the drying chamber 1. A sealing gasket 34 is provided at the connection between the lifting plate 33 and the outer wall of the drying chamber 1 to seal the installation gap and ensure the airtightness of the drying chamber 1. During equipment maintenance, the fixing structure of the lifting plate 33 can be released, and the filter element housing 26 can be pulled out from the drying chamber 1 to clean or replace the first filter element 31 and the second filter element 32 inside.

[0030] Example 6, as Figure 2 As shown, this embodiment adds the following structure based on embodiment 1: the upper inner side of the flow guide shroud 10 is provided with a gas guide surface 35 from left to right and from top to bottom, and the lower inner side of the flow guide shroud 10 is provided with a liquid guide surface 36 from right to left and from top to bottom. The bottom of the liquid guide surface 36 is connected to the recovery channel 9.

[0031] In this embodiment, the natural gas flowing out from the output channel 8 enters the interior of the guide shroud 10 and smoothly turns along the gas guide surface 35, which slopes from left to right and from top to bottom on the upper side of the inside of the guide shroud 10, and flows to the inlet of the transfer pipe 11. It is then input into the condensation mechanism 12 through the transfer pipe 11. When the droplets formed by condensation in the condensation mechanism 12 flow back to the guide shroud 10 through the transfer pipe 11 at the bottom, they are guided and transported by the liquid guide surface 36, which flows from right to left and from top to bottom, and enter the collection assembly 5 through the recovery channel 9. This allows the gas and liquid to be separated within the guide shroud 10, with the gas entering the subsequent condensation mechanism 12 and the liquid flowing back to the collection assembly 5.

[0032] Example 7, as Figure 2 As shown, this embodiment adds the following structure based on embodiment 1: the condensing mechanism 12 includes a condensing box 37, a plurality of condensing pipes 38 are installed inside the condensing box 37, the output end of the adapter pipe 11 is installed at the bottom of the condensing box 37, guide seats 39 are installed on both sides inside the condensing box 37, and an exhaust pipe 40 is installed on one side of the top of the condensing box 37. The exhaust pipe 40 is installed inside the sealing plate 14, and the output end of the exhaust pipe 40 is connected to the input end of the guide channel 13.

[0033] In this embodiment, wet natural gas enters the condenser 37 from the bottom through the transfer pipe 11 and flows upward through several condenser tubes 38 arranged inside the condenser. The condenser tubes 38, which are filled with a low-temperature medium, come into full contact with the wet natural gas for heat exchange, rapidly cooling the natural gas to below the dew point temperature. This causes the saturated water vapor in the gas to condense into liquid water droplets. The condensed droplets fall along the outer wall of the condenser tubes 38 by gravity and flow back to the guide shroud 10 through the transfer pipe 11 at the bottom. Finally, they flow into the collection assembly 5. The cooled and dehydrated natural gas continues to flow upward and flows out from the gas outlet pipe 40 at the top into the guide channel 13.

[0034] The liquid water droplets, guided by the guide seats 39 on both sides, can quickly flow back into the guide cover 10 through the bottom transfer pipe 11.

[0035] Example 8, as Figure 2 As shown, this embodiment adds the following structure based on embodiment 7: a right-angle mounting base 41 is installed on one side of the bottom of the condenser box 37, and the bottom of the right-angle mounting base 41 is installed on the flow guide shroud 10. A support base 42 is installed on the other side of the bottom of the condenser box 37, and the support base 42 is installed on the side wall of the sealing plate 14.

[0036] In this embodiment, the bottom side of the condenser box 37 is fixedly installed on the top of the guide shroud 10 by a right-angle mounting base 41, and the other side is fixedly installed on the side wall of the sealing plate 14 by a support base 42. The right-angle mounting base 41 and the support base 42 together form a dual-point support structure to bear the overall weight of the condenser box 37 and the internal condenser pipe 38, maintain the installation level and structural stability of the condenser box 37, and avoid shaking or displacement during operation.

[0037] Example 9, as Figure 2 As shown, this embodiment adds the following structure to the embodiment 1: a vertically downward airflow channel 43 is provided in the guide channel 13, and several output ports 15 are provided on the lower outer side of the guide channel 13.

[0038] In this embodiment, the natural gas dehydrated by the condensation mechanism 12 flows out from the gas outlet pipe 40 and enters the vertically downward airflow channel 43 inside the guide channel 13. The airflow flows downward in the vertical direction. During the flow, the airflow is dispersed and flows out through several outlets 15 evenly arranged on the lower part of the outer side of the guide channel 13, and is evenly distributed on the entire air inlet end face of the adsorption component 16 below, providing uniform air intake for the subsequent adsorption and drying process.

[0039] Example 10, as Figure 2 As shown, this embodiment adds the following structure based on embodiment 1: the adsorption component 16 includes a support substrate 44, the upper and lower sides of the support substrate 44 are provided with a plurality of uniformly arranged mesh holes 45, the support substrate 44 is provided with a support cavity 46, and the support cavity 46 is filled with 3A molecular sieve adsorbent 47.

[0040] In this embodiment, the natural gas flowing out from the outlet 15 of the guide channel 13 enters the inner support cavity 46 through the mesh 45 on the lower side of the support substrate 44. The natural gas comes into full contact with the 3A molecular sieve adsorbent 47 filled in the support cavity 46. The 3A molecular sieve adsorbs the trace water molecules remaining in the natural gas, thereby achieving deep drying of the natural gas. The deep-dried natural gas flows out of the adsorption assembly 16 through the mesh 45 on the upper side of the support substrate 44 and is finally discharged from the drying chamber 1 through the output pipe 3.

[0041] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A drying device for natural gas liquefaction pretreatment, comprising a drying chamber (1), characterized in that: An input pipe (2) is installed on one side of the drying chamber (1), and an output pipe (3) is installed on the other side of the drying chamber (1). A detachment assembly (4) is installed inside the drying chamber (1) near the output end of the input pipe (2). A collection assembly (5) is installed at the bottom of the detachment assembly (4). A filter assembly (6) is installed on the top of the detachment assembly (4). The output end of the detachment assembly (4) is connected to the input end of the filter assembly (6). A partition (7) is installed on one side of the drying chamber (1) and the detachment assembly (4). An output channel (8) is provided on the upper side of the partition (7). The input end of the output channel (8) is connected to the output end of the filter assembly (6). A recycling channel (9) is provided on the lower side of the partition (7). The output of the recycling channel (9) is... The end is set on the top side of the collection component (5). The partition (7) is equipped with a flow guide (10) on one side of the output channel (8). The lower side of the flow guide (10) is connected to the input end of the recovery channel (9). The output end of the flow guide (10) is connected to the transfer pipe (11). The top output end of the transfer pipe (11) is connected to the condensing mechanism (12). The output end of the condensing mechanism (12) is connected to the guide channel (13). The drying box (1) is equipped with a sealing plate (14) between the condensing mechanism (12) and the guide channel (13). The lower side of the guide channel (13) is provided with several output ports (15). The drying box (1) is equipped with an adsorption component (16) between the sealing plate (14) and the output pipe (3). The adsorption component (16) is set between the output port (15) and the output pipe (3).

2. The drying equipment for natural gas liquefaction pretreatment according to claim 1, characterized in that: The detachment assembly (4) includes several alternating upper baffles (17) and lower baffles (18). Both the upper baffles (17) and lower baffles (18) are inclined. A flow channel (19) is formed between two adjacent upper baffles (17) and lower baffles (18). A support plate (20) is installed on the top of several upper baffles (17). One side of the support plate (20) is installed in the drying chamber (1). An output flow channel (21) is formed between the other side of the support plate (20) and the partition (7). Several lower baffles (18) are installed on the collection assembly (5).

3. The drying equipment for natural gas liquefaction pretreatment according to claim 2, characterized in that: The collection assembly (5) includes a collection box (22) installed at the bottom of the drying chamber (1), a perforated plate (23) installed on the top of the collection box (22), the perforated plate (23) installed at the bottom of the drying chamber (1), a lower baffle plate (18) installed on the perforated plate (23), a collection seat (24) installed on both sides inside the collection box (22), and a drain pipe (25) installed at the collection point of the collection seats (24) on both sides of the collection box (22).

4. A drying device for natural gas liquefaction pretreatment according to claim 3, characterized in that: The filter assembly (6) includes a filter housing (26), which is U-shaped. A filter partition plate (27) is provided inside the filter housing (26). One side of the filter partition plate (27) is fixedly installed on a partition plate (7). The other side of the filter partition plate (27) forms a guide channel (28) with the inner side of the filter housing (26). The filter partition plate (27) divides the internal space of the filter housing (26) into two parts to form a lower filter channel (29) and an upper filter channel (30). A first filter element (31) is installed in the lower filter channel (29). The input end of the lower filter channel (29) is located on the upper side of the output channel (21). A second filter element (32) is installed in the upper filter channel (30). The output end of the upper filter channel (30) is located at the input end of the output channel (8).

5. A drying device for natural gas liquefaction pretreatment according to claim 4, characterized in that: A lifting plate (33) is installed on the outside of the filter element housing (26). The lifting plate (33) is installed on the outside of the drying box (1). A sealing gasket (34) is installed at the connection between the lifting plate (33) and the drying box (1). The filter element housing (26) is slidably installed on the top of the support plate (20) and the top of the inner side of the drying box (1).

6. A drying device for natural gas liquefaction pretreatment according to claim 5, characterized in that: The upper inner side of the flow guide shroud (10) is provided with a gas guide surface (35) from left to right and from top to bottom, and the lower inner side of the flow guide shroud (10) is provided with a liquid guide surface (36) from right to left and from top to bottom. The bottom of the liquid guide surface (36) is connected to the recovery channel (9).

7. A drying device for natural gas liquefaction pretreatment according to claim 6, characterized in that: The condensation mechanism (12) includes a condensation box (37), which has several condensation tubes (38) installed inside. The output end of the transfer pipe (11) is installed at the bottom of the condensation box (37). The condensation box (37) has guide seats (39) installed on both sides inside. The condensation box (37) has an exhaust pipe (40) installed on one side of the top. The exhaust pipe (40) is installed inside the sealing plate (14). The output end of the exhaust pipe (40) is connected to the input end of the guide channel (13).

8. A drying device for natural gas liquefaction pretreatment according to claim 7, characterized in that: A right-angle mounting base (41) is installed on one side of the bottom of the condenser (37), and the bottom of the right-angle mounting base (41) is installed on the flow guide (10). A support base (42) is installed on the other side of the bottom of the condenser (37), and the support base (42) is installed on the side wall of the sealing plate (14).

9. A drying device for natural gas liquefaction pretreatment according to claim 8, characterized in that: The guide channel (13) is provided with a vertically downward airflow channel (43), and a number of the output ports (15) are provided on the lower outer side of the guide channel (13).

10. A drying device for natural gas liquefaction pretreatment according to claim 9, characterized in that: The adsorption component (16) includes a support substrate (44), which has a plurality of uniformly arranged mesh holes (45) on its upper and lower sides. The support substrate (44) has a support cavity (46) inside, which is filled with 3A molecular sieve adsorbent (47).

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