Novel dehydration and dealkylation device for LNG (Liquefied Natural Gas) factory

Abstract

The novel dehydration and dealkylation device comprises a drying machine, the lower surface of the drying machine is fixedly connected with a placement seat, the top end of the drying machine is connected with a gas inlet pipe in a penetrating mode, the edge side of the lower end of the drying machine is connected with an exhaust pipe in a penetrating mode, and a damping rod is fixedly connected to the lower surface of the placement seat. Buffering rods are fixedly connected to the inner sides of the damping rods, and damping mechanisms capable of conducting damping protection on the drying machine are arranged between the buffering rods and the containing base. According to the novel dehydration and dealkylation device for the LNG factory, the hot air blower conveys hot air into the air inlet pipe, moisture and heavy hydrocarbon adsorbed in the molecular sieve are analyzed through a heating method, and meanwhile wind power output by the air cooler annularly carries cold air into the drying machine through the cold conveying pipe; moisture and heavy hydrocarbon desorbed from the adsorbent are condensed and separated through a cooling method, the drying tower saturated in adsorption is heated and regenerated after being heated by a regeneration gas heater, and finally dehydration and dealkylation are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of LNG processing, in particular to a novel dehydration and dehydrocarbon removal device of an LNG plant. Background Art

[0002] LNG is increasingly being used worldwide for its high gasification rate, low carbon emissions, and convenient transportation. As the proportion of natural gas in energy supply increases rapidly, the establishment of large-scale liquefaction plants with low energy consumption and high optimization is of great significance for seizing the domestic new energy market and getting rid of dependence on imported LNG. Natural gas is pretreated to remove unfavorable components in the liquefaction process (acidic components, moisture, heavy hydrocarbons and mercury, etc.), and then enters the heat exchanger of the refrigeration system to continuously cool down, and condense and separate the mixed refrigerant step by step, and finally turns into liquid at normal pressure (about -160℃), and LNG products can be obtained. Conventional LNG plants usually use two or three towers for adsorption regeneration to deeply remove moisture from natural gas; and then use the cold energy generated by the liquefaction device to separate and remove heavy hydrocarbons in natural gas.

[0003] For example, the natural gas multi-tower external circulation anaerobic regeneration dehydration method with application number: CN201310134630.3, especially the natural gas dehydration device and process method for large-scale centralized processing of natural gas pipeline transportation and LNG preparation station, is characterized in that: the water-containing natural gas passes through the adsorption tower under normal temperature conditions and uses the adsorbent to adsorb the water in the gas, and then uses the external regeneration gas to anaerobic regenerate the adsorbent in the adsorption tower and recycle it, so that the impurity components such as water and heavy hydrocarbons adsorbed on the adsorbent are desorbed so that the adsorption tower can carry out the next adsorption process. Each adsorption tower will go through the adsorption, depressurization, purging, heating, cooling and pressure-increasing processes. The process has the characteristics of simple process, high dehydration efficiency, extended adsorbent service life, reduced operating costs, and low energy consumption.

[0004] The natural gas dehydration device in the above-mentioned document is a traditional dehydration and dehydrogenation device with many equipment and facilities, complex operation, high engineering cost, and high requirements on the operator level. Once the heavy hydrocarbons are not removed properly, it is very easy to cause the refrigeration system to freeze and block, resulting in unnecessary venting losses.

[0005] Therefore, we proposed a new dehydration and dehydrogenation device for LNG plants in order to solve the above-mentioned problems. Utility Model Content

[0006] The utility model aims to provide a novel dehydration and dehydrogenation device for an LNG plant, so as to solve the problems in the above-mentioned background technology that the dehydration and dehydrogenation device has many equipment and facilities, complicated operation, high engineering cost and high requirements on the operator level.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new dehydration and dehydrogenation device for an LNG plant, comprising a dryer, a placement seat is fixedly connected to the lower surface of the dryer, an air inlet pipe is penetrated and connected to the top of the dryer, and an exhaust pipe is penetrated and connected to the lower side of the dryer;

[0008] A damping rod, wherein the damping rod is fixedly connected to the lower surface of the placement seat, and a buffer rod is fixedly connected to the inner side of the damping rod, and a shock absorbing mechanism is provided between the buffer rod and the placement seat to provide shock absorbing protection for the dryer;

[0009] A positioning rod is fixedly connected to the inside of the dryer, and a baffle is nested and connected to the outside of the positioning rod, and an adjustment structure for sealing the dryer is arranged between the baffle and the dryer.

[0010] Furthermore, a hot air blower is fixedly connected to the top of the dryer, and the output end of the hot air blower is connected to the air inlet pipe. A cooling pipe is fixedly connected to the interior of the dryer, and the outer end of the cooling pipe extends to the outside of the dryer. A cold air blower is fixedly connected to the outside of the dryer, and the output end of the cold air blower is connected to the cooling pipe.

[0011] Furthermore, the shock absorbing mechanism includes a rotating rod, the upper end of which is hinged to the lower side of the placement seat, a buffer block is nested and connected to the buffer rod, and the upper end of the buffer block is hinged to the rotating rod, and a buffer spring is fixedly connected between the rotating rod and the damping rod;

[0012] A limiting rod is fixedly connected between the damping rods, a limiting sleeve is nested and connected on the limiting rod, and the limiting sleeve is fixedly connected to the buffer block.

[0013] Furthermore, the buffer block and the limiting sleeve are an integrated structure, and the buffer block forms a sliding structure through the rotating rod and the buffer rod, and the buffer block forms an elastic structure through the buffer spring and the damping rod.

[0014] Furthermore, the adjustment structure includes a threaded rod, the threaded rod is nested and connected to the dryer, a handle is fixedly connected to the outer side of the threaded rod, and a baffle is threadedly connected to the outer end of the threaded rod;

[0015] A sealing ring is fixedly connected to the baffle, and a sealing groove is provided on the dryer.

[0016] Furthermore, the baffle plate forms a sliding structure through the threaded rod and the positioning rod, and the diameter of the baffle plate is greater than the maximum diameter of the exhaust pipe.

[0017] Furthermore, a filter screen is nested and connected to the outer end of the exhaust pipe, a pull rod is nested and connected to the sealing ring, and a return spring is fixedly connected between the pull rod and the sealing ring, and the other end of the return spring is nested and connected to the exhaust pipe.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The hot air delivered by the hot air blower to the air inlet pipe is used to resolve the moisture and heavy hydrocarbons adsorbed in the molecular sieve by heating. At the same time, the wind output by the cold air blower carries the cold air to the inside of the dryer through the cold delivery pipe in a circular manner. The moisture and heavy hydrocarbons desorbed from the adsorbent are condensed and separated by cooling. After being heated by the regeneration gas heater, the adsorption saturated drying tower is heated and regenerated, and finally dehydration and dehydrocarbon removal are achieved;

[0020] 2. The dryer is placed on the placement seat, and the damping rod can be used to dampen the dryer. When the placement seat vibrates, it will synchronously drive the rotating rod to rotate. At this time, the rotating rod will synchronously push the buffer block outward to move. When the buffer block moves, it will synchronously squeeze the buffer spring. Driven by the elastic force of the buffer spring, the dryer can be further buffered and damped.

[0021] 3. When the buffer block moves, it will synchronously drive the limit sleeve to move along the limit rod. At this time, the limit rod will limit the limit sleeve, and the buffer block will be limited by the limit sleeve, thereby ensuring the stability of the buffer block during movement and improving the shock absorption effect;

[0022] 4. The user can manually pull the pull rod outward, and the pull rod can leave the exhaust pipe and not be engaged with the exhaust pipe. At this time, the filter can be disassembled. At the same time, the pull rod can be reset under the elastic force of the reset spring, thereby completing the installation of the filter;

[0023] 5. When disassembling the filter, you can manually turn the handle and use the handle to drive the threaded rod to rotate. At this time, the baffle will move under the drive of the thread of the threaded rod, and the positioning rod will limit the moving baffle so that the baffle moves to the exhaust pipe interface and blocks the exhaust pipe under the sealing joint action of the sealing groove and the sealing ring. At this time, the gas will not be discharged outward through the exhaust pipe, and the filter can be replaced better. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0026] Figure 3 This is a schematic diagram of the three-dimensional structure of the baffle of the utility model;

[0027] Figure 4 This is a schematic diagram of the front view structure of the baffle of the utility model;

[0028] Figure 5 This is a schematic diagram of the front view structure of the limit sleeve of the utility model;

[0029] Figure 6 This is a front view structural diagram of the pull rod of the utility model.

[0030] In the figure: 1. dryer; 2. air inlet pipe; 3. hot air blower; 4. cold air blower; 5. exhaust pipe; 6. placement seat; 7. damping rod; 8. rotating rod; 9. cold delivery pipe; 10. buffer rod; 11. buffer block; 12. buffer spring; 13. limit rod; 14. limit sleeve; 15. filter; 16. handle; 17. threaded rod; 18. baffle; 19. sealing groove; 20. sealing ring; 21. positioning rod; 22. pull rod; 23. reset spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1: Figure 2 and Figure 5 The technical solution shown in the figure, the utility model provides the following technical solution: a new dehydration and dehydrogenation device of an LNG plant, discloses a shock absorbing mechanism, through which the dryer 1 can be shock-absorbing and protected:

[0033] A damping rod 7, the damping rod 7 is fixedly connected to the lower surface of the placement seat 6, and a buffer rod 10 is fixedly connected to the inner side of the damping rod 7, and a shock absorbing mechanism is provided between the buffer rod 10 and the placement seat 6 to provide shock absorbing protection for the dryer 1;

[0034] The shock absorbing mechanism includes a rotating rod 8, the upper end of which is hinged to the lower side of the placement seat 6, a buffer block 11 is nested and connected on the buffer rod 10, and the upper end of the buffer block 11 is hinged to the rotating rod 8, and a buffer spring 12 is fixedly connected between the rotating rod 8 and the damping rod 7; a limiting rod 13 is fixedly connected between the damping rods 7, and a limiting sleeve 14 is nested and connected on the limiting rod 13, and the limiting sleeve 14 is fixedly connected to the buffer block 11;

[0035] The buffer block 11 and the limiting sleeve 14 are an integrated structure, and the buffer block 11 forms a sliding structure with the buffer rod 10 through the rotating rod 8 , and the buffer block 11 forms an elastic structure with the damping rod 7 through the buffer spring 12 .

[0036] The dryer 1 is placed on the placement seat 6, and the damping rod 7 can be used to dampen and reduce shock of the dryer 1. At the same time, when the placement seat 6 vibrates, it will synchronously drive the rotating rod 8 to rotate. At this time, the rotating rod 8 will synchronously push the buffer block 11 outward to move. When the buffer block 11 is moving, it will synchronously squeeze the buffer spring 12. Driven by the elastic force of the buffer spring 12, the dryer 1 can be further buffered and reduced in shock.

[0037] Embodiment 2: Figure 2 , Figure 3 , Figure 4 and Figure 6 The technical solution shown in the figure, the utility model provides the following technical solution: a new dehydration and dehydrogenation device of an LNG plant, discloses an adjustment structure, through which the seal of the dryer 1 can be adjusted:

[0038] A positioning rod 21, the positioning rod 21 is fixedly connected to the inside of the dryer 1, and the outer side of the positioning rod 21 is nested with a baffle 18, and an adjustment structure for sealing the dryer 1 is provided between the baffle 18 and the dryer 1;

[0039] The adjustment structure includes a threaded rod 17, which is nested and connected to the dryer 1, and a handle 16 is fixedly connected to the outer side of the threaded rod 17, and a baffle 18 is threadedly connected to the outer end of the threaded rod 17;

[0040] A sealing ring 20 is fixedly connected to the baffle 18, a sealing groove 19 is opened on the dryer 1, the baffle 18 forms a sliding structure through the threaded rod 17 and the positioning rod 21, and the diameter of the baffle 18 is larger than the maximum diameter of the exhaust pipe 5, and the outer end of the exhaust pipe 5 is nested with the filter screen 15, and the sealing ring 20 is nested with a pull rod 22, and a reset spring 23 is fixedly connected between the pull rod 22 and the sealing ring 20, and the other end of the reset spring 23 is nested and connected to the exhaust pipe 5.

[0041] The user can manually pull the pull rod 22 outward, and the pull rod 22 can leave the exhaust pipe 5 and not be engaged with the exhaust pipe 5. At this time, the filter 15 can be removed. At the same time, the pull rod 22 can be reset under the elastic force of the reset spring 23, thereby completing the installation of the filter 15. When removing the filter 15, the handle 16 can be manually turned, and the threaded rod 17 can be driven to rotate by the handle 16. At this time, the baffle 18 will move under the drive of the thread of the threaded rod 17, and the positioning rod 21 limits the moving baffle 18, so that the baffle 18 moves to the interface of the exhaust pipe 5, and blocks the exhaust pipe 5 under the sealing docking action of the sealing groove 19 and the sealing ring 20. At this time, the gas will not be discharged outward through the exhaust pipe 5, and the filter 15 can be better replaced.

[0042] Embodiment 3: Figure 1and Figure 2 The technical solution shown in the figure, the utility model provides the following technical solution: a new dehydration and dehydrocarbonation device of an LNG plant, which discloses a hot air blower 3 and a cold air blower 4, and water and heavy hydrocarbons can be adsorbed by the hot air blower 3 and the cold air blower 4:

[0043] A dryer 1, a placement seat 6 is fixedly connected to the lower surface of the dryer 1, an air inlet pipe 2 is penetrated and connected to the top of the dryer 1, and an exhaust pipe 5 is penetrated and connected to the side of the lower end of the dryer 1;

[0044] A hot air blower 3 is fixedly connected to the top of the dryer 1, and the output end of the hot air blower 3 is connected to the air inlet pipe 2. A cooling pipe 9 is fixedly connected around the inside of the dryer 1, and the outer end of the cooling pipe 9 extends to the outside of the dryer 1. A cold air blower 4 is fixedly connected to the outside of the dryer 1, and the output end of the cold air blower 4 is connected to the cooling pipe 9.

[0045] The hot air delivered by the hot air blower 3 to the air inlet pipe 2 is used to resolve the moisture and heavy hydrocarbons adsorbed in the molecular sieve by heating. At the same time, the wind force output by the cold air blower 4 carries the cold air to the inside of the dryer 1 in a circular shape through the cold delivery pipe 9. The moisture and heavy hydrocarbons desorbed from the adsorbent are condensed and separated by cooling. After being heated by the regeneration gas heater, the adsorption saturated drying tower is heated and regenerated, thereby finally achieving dehydration and dehydrocarbon removal.

[0046] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel dehydration and dehydrogenation device for an LNG plant, comprising a dryer (1), a placement seat (6) being fixedly connected to the lower surface of the dryer (1), an air inlet pipe (2) being connected through the top of the dryer (1), and an exhaust pipe (5) being connected through the lower side of the dryer (1), a hot air blower (3) being fixedly connected to the top of the dryer (1), and an output end of the hot air blower (3) being connected to the air inlet pipe (2), a cold delivery pipe (9) being fixedly connected around the inside of the dryer (1), and an outer end of the cold delivery pipe (9) extending to the outside of the dryer (1), and a cold air blower (4) being fixedly connected to the outside of the dryer (1), and the output end of the cold air blower (4) being connected to the cold delivery pipe (9); Features: Also includes: A damping rod (7), wherein the damping rod (7) is fixedly connected to the lower surface of the placement seat (6), and a buffer rod (10) is fixedly connected to the inner side of the damping rod (7), and a shock absorbing mechanism capable of shock absorbing and protecting the dryer (1) is provided between the buffer rod (10) and the placement seat (6); A positioning rod (21) is fixedly connected to the interior of the dryer (1), and a baffle (18) is nested and connected to the outside of the positioning rod (21), and an adjustment structure capable of sealing the dryer (1) is provided between the baffle (18) and the dryer (1).

2. The novel dehydration and dehydrogenation device of an LNG plant according to claim 1, characterized in that: The shock absorbing mechanism comprises a rotating rod (8), the upper end of which is hinged on the lower side of the placement seat (6), a buffer block (11) is nested and connected on the buffer rod (10), and the upper end of the buffer block (11) is hinged on the rotating rod (8), and a buffer spring (12) is fixedly connected between the rotating rod (8) and the damping rod (7); A limiting rod (13) is fixedly connected between the damping rods (7), a limiting sleeve (14) is nested and connected on the limiting rod (13), and the limiting sleeve (14) is fixedly connected to the buffer block (11).

3. The novel dehydration and dehydrogenation device of an LNG plant according to claim 2, characterized in that: The buffer block (11) and the limiting sleeve (14) are an integrated structure, and the buffer block (11) forms a sliding structure with the buffer rod (10) through the rotating rod (8), and the buffer block (11) forms an elastic structure with the buffer spring (12) and the damping rod (7).

4. The novel dehydration and dehydrogenation device of an LNG plant according to claim 1, characterized in that: The adjustment structure comprises a threaded rod (17), the threaded rod (17) is nested and connected to the dryer (1), a handle (16) is fixedly connected to the outer side of the threaded rod (17), and a baffle (18) is threadedly connected to the outer end of the threaded rod (17); A sealing ring (20) is fixedly connected to the baffle (18), and a sealing groove (19) is provided on the dryer (1).

5. The novel dehydration and dehydrogenation device of an LNG plant according to claim 4, characterized in that: The baffle (18) forms a sliding structure through the threaded rod (17) and the positioning rod (21), and the diameter of the baffle (18) is greater than the maximum diameter of the exhaust pipe (5).

6. The novel dehydration and dehydrogenation device of an LNG plant according to claim 4, characterized in that: The outer end of the exhaust pipe (5) is nested with a filter screen (15), the sealing ring (20) is nested with a pull rod (22), and a return spring (23) is fixedly connected between the pull rod (22) and the sealing ring (20), and the other end of the return spring (23) is nested with the inside of the exhaust pipe (5).

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