Pressurizing and cooling equipment for liquefied natural gas production

Abstract

The invention relates to the technical field of liquefied natural gas production, and discloses pressurized cooling equipment for liquefied natural gas production, which comprises a compressor, a cache assembly, a heat exchanger and a desulfurization assembly, the desulfurization assembly comprises a transverse bin, three material blocking assemblies are installed in the transverse bin at equal intervals, and the interior of the transverse bin is divided into an activated carbon filler cavity, a desulfurizer filler cavity, a flocculant filler cavity and a filter cavity through the three material blocking assemblies. According to the pressurized cooling equipment for liquefied natural gas production, purified wastewater returns to the interior of the heat exchanger again and is mixed with cooling water in the heat exchanger, the temperature of the cooling water is reduced, natural gas in the buffer tank is heated by heat generated during operation of the heat exchanger, and the heat exchanger is assisted in heating the natural gas; the heat exchange efficiency is further improved, the energy consumption caused by simultaneous heating and cooling is reduced, and meanwhile, the treatment efficiency of the sulfur-containing wastewater and the effluent quality are remarkably improved by adopting a combined technology of activated carbon, a desulfurizing agent and a flocculating agent in sequence.

Description

Technical Field

[0001] The present invention relates to the technical field of liquefied natural gas production, and in particular to pressurized cooling equipment for liquefied natural gas production. Background Art

[0002] As a clean and efficient energy source, liquefied natural gas occupies an increasingly important position in the energy structure.

[0003] The production of liquefied natural gas (LNG) involves pressurizing and cooling natural gas to below its boiling point to liquefy it. This process is crucial for ensuring the efficient and safe transportation and storage of natural gas. However, existing LNG production equipment has several issues with the pressurization and cooling processes. During the LNG cooling process, a large amount of condensate is easily generated. This condensate is sulfur-containing wastewater, making subsequent treatment cumbersome. Furthermore, the simultaneous heating and cooling processes result in significant energy losses and low cooling efficiency. Summary of the Invention

[0004] In view of the above-mentioned problems that a large amount of condensed water is easily generated during the cooling process of LNG, and the condensed water is sulfur-containing wastewater, subsequent treatment is relatively cumbersome, and the energy loss of heating and cooling at the same time is large, and the cooling efficiency is low, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a pressurized cooling device for liquefied natural gas production, which aims to reduce energy loss and improve the treatment effect of sulfur-containing wastewater.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a pressurized cooling device for liquefied natural gas production, comprising a compressor, a buffer assembly, a heat exchanger, and a desulfurization assembly, wherein a first pipeline is fixedly connected between the natural gas outlet of the compressor and the natural gas inlet of the buffer assembly, a second pipeline is fixedly connected between the natural gas outlet of the buffer assembly and the natural gas inlet of the heat exchanger, a third pipeline is fixedly connected between the condensate wastewater outlet of the heat exchanger and the condensate wastewater inlet of the desulfurization assembly, a fourth pipeline is installed between the purified water outlet of the desulfurization assembly and the cooling water inlet of the heat exchanger, and a steam pipeline is installed between the steam outlet of the heat exchanger and the heat inlet of the buffer assembly; The desulfurization assembly includes a horizontal bin, a water inlet connecting pipe is welded at the water inlet on one side of the horizontal bin, a drainage connecting pipe is installed at the drainage outlet on the other side of the horizontal bin, and three blocking assemblies are installed at equal intervals inside the horizontal bin, and the interior of the horizontal bin is divided into an activated carbon filling chamber, a desulfurizer filling chamber, a flocculant filling chamber and a filter chamber by the three blocking assemblies; An activated carbon stirring assembly is installed inside the activated carbon filling chamber, a desulfurizer stirring assembly is installed inside the desulfurizer filling chamber, and a flocculant stirring assembly is installed inside the flocculant filling chamber. The structures of the activated carbon stirring assembly, desulfurizer stirring assembly and flocculant stirring assembly are consistent, and an L-shaped filter is fixed inside the filter chamber.

[0007] As an improved technical solution, the cache assembly includes an insulation shell, a buffer tank is fixed inside the insulation shell, a feed pipe is welded at the inlet of the top of the buffer tank, a heat inlet pipe is welded at the inlet of the bottom of the insulation shell, exhaust ports are opened at both ends of the insulation shell, and a heat exhaust pipe is welded at the position of the insulation shell facing the exhaust port.

[0008] As an improved technical solution, two groups of partitions are welded between the outer wall of the buffer tank and the inner wall of the insulation shell, and the two groups of partitions are located on both sides of the buffer tank. The two adjacent partitions in the same group are arranged in an upper and lower relative position, so that the path of heat flowing inside the insulation shell is wavy.

[0009] As an improved technical solution, the material blocking assembly includes a second crossbeam plate fixed on the top of the cross bin, and a second drive motor is fixed at both ends of the top of the second crossbeam plate. The driving end of the second drive motor is fixedly connected to a mounting shaft, and the outer wall surface of the mounting shaft is sleeved with a water baffle, and the opposite ends of the two water baffles are arranged in an arc shape.

[0010] As an improved technical solution, the activated carbon stirring assembly includes a crossbeam plate 1 fixed on the top of the cross bin, and the crossbeam plate 1 is rotatably installed with a rotating shaft through a through hole opened in the middle thereof, and two stirring blades are installed at the end of the rotating shaft away from the crossbeam plate 1.

[0011] As an improved technical solution, the crossbeam plate 1 includes a hollow tube rotatably installed at the middle through hole of the crossbeam plate 1 through a bearing, a hollow cylinder is welded at the end of the hollow tube away from the crossbeam plate 1, a feed through hole is provided at the end of the hollow cylinder close to the hollow tube, a stirring shaft is welded at the center of the end of the hollow cylinder away from the hollow tube, and a circle of spray holes is provided on the outer edge of the end of the hollow cylinder away from the hollow tube.

[0012] As an improved technical solution, a limit frame is welded in the middle of the bottom of the beam plate, a circular hole for the hollow cylinder to pass through is opened in the middle of the limit frame, and the hollow cylinder is rotatably installed in the circular hole through a bearing.

[0013] As an improved technical solution, a feed connecting pipe is rotatably installed on the end of the hollow tube away from the inside of the hollow cylinder through a bearing. The feed connecting pipe is fixed to the top of the beam plate one through an L-shaped plate welded on its outer wall, and an air intake connecting pipe is welded at the feed port on the peripheral surface of the feed connecting pipe.

[0014] As an improved technical solution, an umbrella-shaped disc plate is sleeved on the end of the hollow cylinder away from the cross beam plate, and vertical plates are welded at the four corners of the inner wall of the umbrella-shaped disc plate. A cross-hanging plate is arranged between the four vertical plates away from the end of the umbrella-shaped disc plate, and the scraping end of the cross-hanging plate is used to clean the sediment at the bottom of the inner wall of the horizontal bin.

[0015] As an improved technical solution, a gear 1 is sleeved on the end of the hollow tube away from the hollow cylinder, a drive motor 1 is fixed to the bottom of the beam plate 1 and on one side of the rotating shaft, and a gear 2 that meshes with gear 1 is fixedly installed on the driving end of the drive motor 1.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, condensed wastewater enters the interior of the desulfurization component for desulfurization treatment. The purified wastewater returns to the interior of the heat exchanger and mixes with the cooling water inside the heat exchanger, thereby reducing the temperature of the cooling water and improving the heat exchange efficiency. In addition, the heat generated by the heat exchanger during operation heats the natural gas inside the buffer tank, thereby assisting the heat exchanger in heating the natural gas to achieve liquefaction conditions, further improving the heat exchange efficiency and reducing the energy consumption of simultaneous heating and cooling.

[0017] 2. In the present invention, when heat enters the interior of the insulation jacket through the heat inlet pipe, the heat is limited and guided by two sets of partitions inside the insulation jacket, so that the heat flows to both sides simultaneously in a wave path, extending the time the heat stays inside the insulation jacket, and further extending the time the heat contacts the buffer tank, effectively improving the effect of the heat on heating natural gas.

[0018] 3. The present invention adopts a triple synergistic treatment process for sulfur-containing wastewater by sequentially adopting a combination of activated carbon stirring, desulfurizer stirring and flocculant stirring technology, which significantly improves the treatment efficiency and effluent water quality of sulfur-containing wastewater, and is efficient, economical and environmentally friendly. In addition, the filler settled at the bottom of the horizontal bin can be lifted up by a cross hanging plate and re-mixed with the wastewater, avoiding the waste of filler caused by filler sedimentation, which is more economical and environmentally friendly.

[0019] 4. In the present invention, the filler falls into the interior of the hollow tube through the feed connecting tube, and enters the interior of the hollow cylinder through the feed through-hole, and finally the filler is sprinkled into the interior of the horizontal bin through the spray hole. Under the action of high-speed rotating centrifugal force, the range of the filler being sprinkled will be expanded, thereby expanding the area where the filler diffuses inside the horizontal bin. At the same time, the spray hole is also in a state of 360-degree rotation, and the spray port is in a constantly active state, which effectively improves the comprehensiveness and progress of the mixing of the filler and the wastewater. Moreover, while adding filler to the interior of the horizontal bin, a high-pressure airflow can also be delivered to the interior through a high-pressure air pump. The airflow makes the material more evenly dispersed when sprayed, and can also expand the distance of the material spraying, and it is also beneficial to avoid the spray hole being blocked.

[0020] 5. In the present invention, the second driving motor drives the mounting shaft to rotate, and the mounting shaft drives the water baffle to rotate. The water baffles on both sides rotate at the same time. The larger the opening of the water baffles on both sides, the greater the water flow rate, and the smaller the opening of the water baffles on both sides, the smaller the water flow rate. Therefore, the opening of the water baffles on both sides can be controlled to control the flow rate of wastewater, and then control the time that the wastewater stays in the activated carbon filling cavity, the desulfurizer filling cavity and the flocculant filling cavity, thereby extending the reaction time, promoting a more comprehensive reaction of the wastewater, and improving the purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them: Figure 1 This is a schematic structural diagram of a pressurized cooling device for liquefied natural gas production according to the present invention.

[0022] Figure 2 This is a schematic cross-sectional structural diagram of a cache assembly of a pressurized cooling device for liquefied natural gas production according to the present invention.

[0023] Figure 3 This is a schematic structural diagram of a desulfurization component of a pressurized cooling device for liquefied natural gas production according to the present invention.

[0024] Figure 4 This is a schematic structural diagram of an activated carbon stirring assembly of a pressurized cooling device for liquefied natural gas production according to the present invention.

[0025] Figure 5 This is a partial cross-sectional structural schematic diagram of a rotating shaft of a pressurized cooling device for producing liquefied natural gas according to the present invention.

[0026] Figure 6This is a structural schematic diagram of a material resistance component of a pressurized cooling device for liquefied natural gas production according to the present invention.

[0027] Description of reference numerals: 1. Compressor; 2. Buffer assembly; 21. Insulation jacket; 22. Buffer tank; 23. Partition; 24. Heat exhaust pipe; 25. Heat inlet pipe; 26. Feed pipe; 3. Heat exchanger; 4. Desulfurization assembly; 41. Horizontal bin; 42. L-shaped filter; 43. Drain pipe; 44. Water inlet pipe; 5. Material blocking assembly; 51. Crossbeam plate 2; 52. Drive motor 2; 53. Mounting shaft; 54. Water retaining plate; 6. Activated carbon stirring assembly; 61. Crossbeam plate 1 62. Rotating shaft; 621. Hollow tube; 622. Feed through hole; 623. Hollow cylinder; 624. Stirring shaft; 625. Spray hole; 626. Limiting frame; 63. Umbrella-shaped plate; 64. Stirring blade; 65. Vertical plate; 66. Cross hanging plate; 67. L-shaped plate; 68. Feed connecting pipe; 69. Air intake connecting pipe; 610. Gear 1; 611. Gear 2; 612. Drive motor 1; 7. Desulfurizer stirring assembly; 8. Flocculant stirring assembly. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Example

[0029] Reference Figures 1-6 , which is the first embodiment of the present invention, provides a pressurized cooling device for liquefied natural gas production. This pressurized cooling device for liquefied natural gas production includes a compressor 1, a buffer component 2, a heat exchanger 3, and a desulfurization component 4. A first pipeline is fixedly connected between the natural gas outlet of the compressor 1 and the natural gas inlet of the buffer component 2. A second pipeline is fixedly connected between the natural gas outlet of the buffer component 2 and the natural gas inlet of the heat exchanger 3. A third pipeline is fixedly connected between the condensate wastewater outlet of the heat exchanger 3 and the condensate wastewater inlet of the desulfurization component 4. A fourth pipeline is installed between the purified water outlet of the desulfurization component 4 and the cooling water inlet of the heat exchanger 3. A steam pipeline is installed between the steam outlet of the heat exchanger 3 and the heat inlet of the buffer component 2. The desulfurization assembly 4 includes a horizontal bin 41. A water inlet connecting pipe 44 is welded to the water inlet on one side of the horizontal bin 41. A drainage connecting pipe 43 is installed at the drainage outlet on the other side of the horizontal bin 41. Three blocking components 5 are installed at equal intervals inside the horizontal bin 41. The interior of the horizontal bin 41 is divided into an activated carbon filling chamber, a desulfurizer filling chamber, a flocculant filling chamber, and a filter chamber by the three blocking components 5. An activated carbon stirring assembly 6 is installed inside the activated carbon filling chamber, a desulfurizer stirring assembly 7 is installed inside the desulfurizer filling chamber, and a flocculant stirring assembly 8 is installed inside the flocculant filling chamber. The structures of the activated carbon stirring assembly 6, the desulfurizer stirring assembly 7 and the flocculant stirring assembly 8 are consistent. An L-shaped filter screen 42 is fixed inside the filter chamber. By adopting the combined technology of activated carbon stirring, desulfurizer stirring and flocculant stirring in sequence, the triple synergistic treatment process of sulfur-containing wastewater significantly improves the treatment efficiency and effluent water quality of sulfur-containing wastewater, and achieves efficient, economical and environmentally friendly treatment.

[0030] The cache assembly 2 includes an insulation shell 21, a buffer tank 22 is fixed inside the insulation shell 21, a feed pipe 26 is welded at the inlet of the top of the buffer tank 22, and the inlet of the feed pipe 26 is located outside the insulation shell 21, a heat inlet pipe 25 is welded at the inlet of the bottom of the insulation shell 21, exhaust ports are opened at both ends of the insulation shell 21, and a heat exhaust pipe 24 is welded at the position of the insulation shell 21 facing the exhaust port.

[0031] Two groups of partitions 23 are welded between the outer wall of the buffer tank 22 and the inner wall of the insulation shell 21, and the two groups of partitions 23 are respectively located on both sides of the buffer tank 22. The two adjacent partitions 23 of the same group are arranged in an upper and lower relative state, so that the path of heat flowing inside the insulation shell 21 is wavy. When heat enters the insulation shell 21 through the heat inlet pipe 25, the two groups of partitions 23 inside the insulation shell 21 limit and guide the heat, so that the heat flows to both sides at the same time in a wavy path, prolonging the time the heat stays inside the insulation shell 21, and then prolonging the time the heat contacts the buffer tank 22, effectively improving the effect of heat heating natural gas.

[0032] The material blocking assembly 5 includes a crossbeam plate 2 51 fixed to the top of the horizontal bin 41, and a drive motor 2 52 is fixed at both ends of the top of the crossbeam plate 2 51, and the movable end of the drive motor 2 52 is located below the crossbeam plate 2 51, and the driving end of the drive motor 2 52 is fixedly connected to a mounting shaft 53, and the end of the mounting shaft 53 away from the drive motor 2 52 is rotatably mounted inside the horizontal bin 41 through a bearing, and the outer wall surface of the mounting shaft 53 is sleeved with a water baffle 54, and the opposite ends of the two water baffles 54 are arranged in an arc shape, and the drive motor 2 5 2 drives the installation shaft 53 to rotate, and the installation shaft 53 drives the water baffle 54 to rotate. The water baffles 54 on both sides rotate at the same time. The larger the opening of the water baffles 54 on both sides, the greater the water flow rate, and the smaller the opening of the water baffles 54 on both sides, the smaller the water flow rate. Therefore, the opening of the water baffles 54 on both sides can be controlled to control the flow rate of wastewater, and then control the time that the wastewater stays in the activated carbon filling cavity, the desulfurizer filling cavity and the flocculant filling cavity, thereby extending the reaction time, promoting a more comprehensive reaction of the wastewater, and improving the purification effect.

[0033] During use, the condensed wastewater generated during cooling enters the interior of the desulfurization component 4 for desulfurization treatment, and the purified wastewater returns to the interior of the heat exchanger 3 and mixes with the cooling water inside the heat exchanger 3, thereby reducing the temperature of the cooling water and improving the heat exchange efficiency. In addition, the heat generated by the heat exchanger 3 during operation enters the interior of the insulation shell 21 through the steam pipeline and the heat inlet pipe 25, heating the natural gas inside the buffer tank 22, thereby assisting the heat exchanger to heat the natural gas to achieve liquefaction conditions, further improving the heat exchange efficiency, and reducing the energy consumption of heating and cooling at the same time. Example

[0034] Reference Figure 4-Figure 5 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the activated carbon stirring assembly 6 includes a crossbeam plate 61 fixed on the top of the cross bin 41, and the crossbeam plate 61 is rotatably mounted with a rotating shaft 62 through a through hole opened in the middle thereof, and two stirring blades 64 are mounted on the end of the rotating shaft 62 away from the crossbeam plate 61.

[0035] The crossbeam plate 61 includes a hollow tube 621 rotatably mounted at a through hole in the middle of the crossbeam plate 61 through a bearing, a hollow cylinder 623 is welded to the end of the hollow tube 621 away from the crossbeam plate 61, a feed through hole 622 is provided at the end of the hollow cylinder 623 close to the hollow tube 621, and the hollow tube 621 and the hollow cylinder 623 are connected through the feed through hole 622, a stirring shaft 624 is welded to the center of the end of the hollow cylinder 623 away from the hollow tube 621, two stirring blades 64 are mounted on the stirring shaft 624, and a circle of spray holes 625 is provided on the outer edge of the end of the hollow cylinder 623 away from the hollow tube 621.

[0036] A limiting frame 626 is welded in the middle of the bottom of the crossbeam plate 61. A circular hole for the hollow cylinder 623 to pass through is opened in the middle of the limiting frame 626, and the hollow cylinder 623 is rotatably installed inside the circular hole through a bearing.

[0037] A gear 610 is sleeved on one end of the hollow tube 621 away from the hollow cylinder 623, and a drive motor 612 is fixed to the bottom of the crossbeam plate 61 and on one side of the rotating shaft 62, and the driving end of the drive motor 612 is located above the crossbeam plate 61. The driving end of the drive motor 612 is fixedly mounted with a gear 2 611 that meshes with the gear 1 610.

[0038] During use, while the rotating shaft 62 rotates, the filler falls into the interior of the hollow tube 621 through the feed connecting tube 68, and enters the interior of the hollow cylinder 623 through the feed through hole 622. Finally, the filler is sprinkled into the interior of the horizontal bin 41 through the spray hole 625. Under the action of the high-speed rotating centrifugal force, the range of the filler being sprinkled will be expanded, thereby expanding the area where the filler diffuses inside the horizontal bin 41. At the same time, the spray hole 625 is also in a 360-degree rotation state, and the spray port is in a constantly active state, which effectively improves the comprehensiveness and progress of the mixing of the filler and the wastewater.

[0039] The remaining structures are the same as those of Example 1. Example

[0040] Reference Figure 5 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: a feed connecting pipe 68 is rotatably installed at one end of the hollow tube 621 away from the interior of the hollow cylinder 623 through a bearing. The feed connecting pipe 68 is fixed to the top of the crossbeam plate 61 through an L-shaped plate 67 welded to its outer wall. The L-shaped plate 67 is fixed to the top of the crossbeam plate 61. An air intake connecting pipe 69 is welded at the feed port on the peripheral surface of the feed connecting pipe 68. The air intake connecting pipe 69 is externally connected to a high-pressure air pump.

[0041] An umbrella-shaped disc 63 is sleeved on the end of the hollow cylinder 623 away from the cross beam plate 61. The umbrella-shaped disc 63 restricts the filler to prevent the filler from flying upward and polluting the environment, and also causes the filler to fall and contact with the wastewater. Vertical plates 65 are welded at the four corners of the inner wall of the umbrella-shaped disc 63. A cross hanging plate 66 is arranged between the four vertical plates 65 away from the end of the umbrella-shaped disc 63, and the scraping end of the cross hanging plate 66 is used to clean the sediment at the bottom of the inner wall of the horizontal bin 41. When the rotating shaft 62 rotates, the cross hanging plate 66 will also be driven to rotate through the vertical plate 65. The filler settled at the bottom of the horizontal bin 41 can be lifted up and mixed with the wastewater again through the cross hanging plate 66, avoiding the waste of filler caused by the sedimentation of the filler, which is more economical and environmentally friendly.

[0042] During use, while adding filler to the inside of the horizontal bin 41, a high-pressure airflow can also be delivered to the inside of 49 through a high-pressure air pump. The airflow makes the material more evenly dispersed when sprayed out, and can also expand the distance of material spraying, and also helps to avoid the spray hole 625 from being blocked.

[0043] The remaining structures are the same as those of Example 2.

[0044] In summary, the working principle of the present invention is as follows: natural gas is pressurized by compressor 1 and then sent into the buffer tank 22 to stabilize the pressure. The natural gas then enters the heat exchanger 3 for cooling. The condensed wastewater generated during cooling enters the desulfurization component 4 for desulfurization treatment. The purified wastewater returns to the heat exchanger 3 and mixes with the cooling water inside the heat exchanger 3. In addition, the heat generated by the heat exchanger 3 during operation enters the insulation jacket 21 through the steam pipeline and the heat inlet pipe 25, thereby heating the natural gas inside the buffer tank 22. The feed port of the activated carbon stirring assembly 6 is connected to the outlet of the activated carbon material pump, the feed port of the desulfurizer stirring assembly 7 is connected to the outlet of the desulfurizer material pump, and the feed port of the flocculant stirring assembly 8 is connected to the outlet of the coagulant aid material pump; When the condensed wastewater enters the activated carbon filling chamber through the water inlet pipe 44, the activated carbon material is added to the interior of the material chamber and stirred by the activated carbon stirring component 6. The condensed wastewater mixed with the activated carbon enters the desulfurizer filling chamber, and the desulfurizer is added to the interior of the material chamber and stirred by the desulfurizer stirring component 7. Then, the condensed wastewater enters the flocculant filling chamber, and the flocculant is added to the interior of the material chamber and stirred by the flocculant stirring component 8. Finally, the condensed wastewater enters the filter chamber, and is filtered by the L-shaped filter 42. The purified wastewater is discharged through the drainage pipe 43. The driving motor 1 612 drives the gear 2 611 to rotate. Under the meshing transmission action of the gear 2 611 and the gear 1 610, the rotating shaft 62 is driven to rotate, so that the stirring blade 64 stirs the condensed wastewater in the material chamber, promotes the uniformity of mixing the condensed wastewater and the filler, and accelerates the contact reaction between the wastewater and the filler.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A pressurized cooling device for liquefied natural gas production, comprising a compressor (1), a buffer component (2), a heat exchanger (3) and a desulfurization component (4), characterized in that: A first pipeline is fixedly connected between the natural gas outlet of the compressor (1) and the natural gas inlet of the cache component (2); a second pipeline is fixedly connected between the natural gas outlet of the cache component (2) and the natural gas inlet of the heat exchanger (3); a third pipeline is fixedly connected between the condensate wastewater outlet of the heat exchanger (3) and the condensate wastewater inlet of the desulfurization component (4); a fourth pipeline is installed between the purified water outlet of the desulfurization component (4) and the cooling water inlet of the heat exchanger (3); and a steam pipeline is installed between the steam outlet of the heat exchanger (3) and the heat inlet of the cache component (2); The desulfurization component (4) includes a transverse bin (41), a water inlet connecting pipe (44) is welded at the water inlet on one side of the transverse bin (41), a drainage connecting pipe (43) is installed at the drainage outlet on the other side of the transverse bin (41), and three blocking components (5) are installed at equal intervals inside the transverse bin (41). The interior of the transverse bin (41) is divided into an activated carbon filling chamber, a desulfurizer filling chamber, a flocculant filling chamber and a filter chamber by the three blocking components (5); An activated carbon stirring assembly (6) is installed inside the activated carbon filling chamber, a desulfurizer stirring assembly (7) is installed inside the desulfurizer filling chamber, and a flocculant stirring assembly (8) is installed inside the flocculant filling chamber. The structures of the activated carbon stirring assembly (6), the desulfurizer stirring assembly (7) and the flocculant stirring assembly (8) are consistent, and an L-shaped filter screen (42) is fixed inside the filter chamber.

2. The pressurized cooling equipment for liquefied natural gas production according to claim 1, characterized in that: The cache assembly (2) includes a heat-insulating shell (21), a buffer tank (22) is fixed inside the heat-insulating shell (21), a feed pipe (26) is welded at the inlet of the top of the buffer tank (22), a heat inlet pipe (25) is welded at the inlet of the bottom of the heat-insulating shell (21), exhaust ports are provided at both ends of the heat-insulating shell (21), and a heat exhaust pipe (24) is welded at a position of the heat-insulating shell (21) facing the exhaust port.

3. The pressurized cooling equipment for liquefied natural gas production according to claim 2, characterized in that: Two groups of partitions (23) are welded between the outer wall of the buffer tank (22) and the inner wall of the heat-insulating shell (21), and the two groups of partitions (23) are respectively located on both sides of the buffer tank (22). Two adjacent partitions (23) in the same group are arranged in an upper and lower relative state, so that the path of heat flowing inside the heat-insulating shell (21) is wavy.

4. The pressurized cooling equipment for liquefied natural gas production according to claim 3, characterized in that: The material blocking assembly (5) includes a second crossbeam plate (51) fixed on the top of the transverse bin (41), and a second drive motor (52) is fixed at both ends of the top of the second crossbeam plate (51), and the driving end of the second drive motor (52) is fixedly connected to a mounting shaft (53), and the outer wall surface of the mounting shaft (53) is sleeved with a water baffle (54), and the opposite ends of the two water baffles (54) are arranged in an arc shape.

5. The pressurized cooling equipment for liquefied natural gas production according to claim 4, characterized in that: The activated carbon stirring assembly (6) includes a crossbeam plate (61) fixed on the top of the cross bin (41), and a rotating shaft (62) is rotatably mounted on the crossbeam plate (61) through a through hole opened in the middle thereof. Two stirring blades (64) are mounted on one end of the rotating shaft (62) away from the crossbeam plate (61).

6. The pressurized cooling equipment for liquefied natural gas production according to claim 5, characterized in that: The crossbeam plate (61) includes a hollow tube (621) rotatably mounted on a through hole in the middle of the crossbeam plate (61) via a bearing, a hollow cylinder (623) is welded to one end of the hollow tube (621) away from the crossbeam plate (61), a feeding through hole (622) is provided at one end of the hollow cylinder (623) close to the hollow tube (621), a stirring shaft (624) is welded to the center of the end of the hollow cylinder (623) away from the hollow tube (621), and a circle of injection holes (625) is provided on the outer edge of the end of the hollow cylinder (623) away from the hollow tube (621).

7. The pressurized cooling equipment for liquefied natural gas production according to claim 6, characterized in that: A limiting frame (626) is welded to the middle of the bottom of the crossbeam plate (61), and a circular hole for the hollow cylinder (623) to pass through is opened in the middle of the limiting frame (626), and the hollow cylinder (623) is rotatably mounted inside the circular hole through a bearing.

8. The pressurized cooling equipment for liquefied natural gas production according to claim 7, characterized in that: A feed connecting pipe (68) is rotatably mounted on one end of the hollow tube (621) away from the interior of the hollow cylinder (623) via a bearing. The feed connecting pipe (68) is fixed to the top of the crossbeam plate (61) via an L-shaped plate (67) welded to its outer wall. An air intake connecting pipe (69) is welded to the feed port on the peripheral surface of the feed connecting pipe (68).

9. The pressurized cooling equipment for liquefied natural gas production according to claim 8, characterized in that: An umbrella-shaped plate (63) is sleeved on one end of the hollow cylinder (623) away from the cross beam plate (61), and vertical plates (65) are welded at the four corners of the inner wall of the umbrella-shaped plate (63). A cross hanging plate (66) is arranged between the ends of the four vertical plates (65) away from the umbrella-shaped plate (63), and the scraping end of the cross hanging plate (66) is used to clean the sediment at the bottom of the inner wall of the horizontal bin (41).

10. The pressurized cooling equipment for liquefied natural gas production according to claim 9, characterized in that: One end of the hollow tube (621) away from the hollow cylinder (623) is sleeved with a gear 1 (610), and a driving motor 1 (612) is fixed to the bottom of the crossbeam plate 1 (61) and located on one side of the rotating shaft (62), and a gear 2 (611) meshing with the gear 1 (610) is fixedly installed at the driving end of the driving motor 1 (612).

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