Low-temperature and normal-temperature adsorption dealkylation process for natural gas

Abstract

The invention discloses a low-temperature and normal-temperature adsorption dealkylation process for natural gas, and relates to the technical field of natural gas treatment. Low-temperature and normal-temperature adsorption dealkylation of natural gas is completed through cooperation of a supporting table, a material supplementing mechanism and an uninterrupted dust removal mechanism, the uninterrupted dust removal mechanism is installed on the upper end face of the supporting table, and the material supplementing mechanism used for being matched with the uninterrupted dust removal mechanism so as to continuously provide and replace needed activated carbon plates is installed on the upper portion of the supporting table. And a matching unit used for driving the linkage assembly to operate is jointly arranged between the mounting rod and the linkage assembly. According to the invention, when activated carbon plates in the longitudinally arranged rectangular placing frames are sequentially replaced in turn, communication between the replaced rectangular placing frames and the gas conveying pipe is cut off; and the other rectangular placing frame keeps an activated carbon plate replacement mode in a normal communication state, so that the sealing performance during replacement can be guaranteed, natural gas leakage is avoided, meanwhile, continuous natural gas conveying is kept, and the natural gas treatment speed is increased.

Description

Technical Field

[0001] The invention relates to the technical field of natural gas processing, and in particular to a natural gas low-temperature plus normal-temperature adsorption dehydrogenation process. Background Art

[0002] Natural gas is a gaseous fossil fuel mainly composed of methane. It is the energy resource with the smallest carbon number and is mainly used as fuel gas, power generation and chemical industry. Natural gas needs to be purified during the production process, among which the low-temperature plus normal temperature adsorption process is the most common one. The low-temperature plus normal temperature adsorption process is a natural gas comprehensive dehydrogenation process that combines low-temperature separation technology and normal temperature adsorption technology. This process can remove heavy hydrocarbon components in natural gas, and can also remove moisture and other impurities to meet the requirements of natural gas pipeline transportation or liquefied natural gas production. The current natural gas low-temperature plus normal temperature adsorption dehydrogenation process includes activated carbon adsorption, mercury removal, heavy hydrocarbon removal and dust removal, among which dust removal is the most important step before natural gas enters the liquefaction system.

[0003] When replacing the activated carbon in the existing dust removal equipment, the dust removal equipment will be connected to the outside world. In order to prevent natural gas leakage, the natural gas supply needs to be cut off before the replacement can be carried out. In addition, in order to improve the dust removal effect, multiple activated carbon filter units are usually arranged equidistantly and used. The activated carbon filter unit close to the air inlet will be saturated first, and the remaining activated carbon filter units gradually away from the air inlet will be saturated in turn, resulting in the need to frequently cut off the gas and replace the activated carbon in turn, which affects the natural gas processing speed. In addition, the frequent gas cutting operations and activated carbon replacement process increase the complexity of the operation. Summary of the invention

[0004] The present invention provides a natural gas low-temperature plus room-temperature adsorption dehydrogenation process, which solves the problem that the existing dust removal equipment needs to be connected to the outside world when replacing activated carbon, so the natural gas delivery must be cut off to prevent leakage. The interruption will affect the natural gas processing efficiency, and because multiple activated carbon filter units are arranged equidistantly, the unit close to the air inlet will be saturated first, and the other units will be saturated in turn, resulting in frequent and multiple gas interruption and replacement operations. The frequent gas interruption and replacement process not only affects the processing speed, but also increases the complexity of the operation. Technical problem.

[0005] The present invention provides a natural gas low temperature plus room temperature adsorption dehydrogenation process, and the specific steps of the natural gas low temperature plus room temperature adsorption dehydrogenation process are as follows:

[0006] S1. Activated carbon adsorption treatment: The dehydrated natural gas is passed through an activated carbon filter for activated carbon adsorption treatment to remove solid particles in the natural gas.

[0007] S2. Mercury removal treatment: The natural gas after the activated carbon adsorption treatment enters the mercury removal tower from the top of the tower for mercury removal treatment.

[0008] S3. Low temperature cooling treatment: The natural gas after the mercury removal treatment is subjected to low temperature cooling treatment by a low temperature cooling system to remove hydrocarbons that are easily separated by cooling, wherein the low temperature cooling system adopts a propane refrigerant or an ethylene refrigerant circulating refrigeration system.

[0009] S4. Heavy hydrocarbon removal treatment: The natural gas after low-temperature cooling treatment enters the heavy hydrocarbon adsorber for heavy hydrocarbon removal treatment to remove heavy hydrocarbons in the natural gas and ensure that the natural gas reaches the required purity.

[0010] S5. Dust removal: The natural gas that has been treated to remove heavy hydrocarbons is subjected to dust removal through an uninterrupted dust removal mechanism, and the dust-removed and purified natural gas is sent to the liquefaction system.

[0011] The low-temperature plus normal-temperature adsorption dehydrogenation process steps of natural gas in the above-mentioned steps S1-S5 need to be completed by the support, the feeding mechanism and the uninterrupted dust removal mechanism.

[0012] An uninterrupted dust removal mechanism is installed on the upper surface of the support platform, and a feeding mechanism for cooperating with the uninterrupted dust removal mechanism to continuously provide the activated carbon plates required for placement and replacement is installed on the upper part of the support platform. The uninterrupted dust removal mechanism includes a gas pipeline fixedly connected through the support plate and a plurality of alternating replacement parts equidistantly arranged axially on the gas pipeline for alternately replacing the activated carbon plates to facilitate continuous and uninterrupted transportation of natural gas. The alternating replacement part includes an installation box embedded in the gas pipeline and a partition fixedly connected to the middle between the front and rear cavity walls of the installation box, and the upper and lower sides of the partition are respectively fixedly connected to rectangular placement frames for placing activated carbon plates, and the left and right end faces of the rectangular placement frame are respectively fixedly connected to door-type frames The door-shaped frame is provided with an opening and closing component for controlling the connection and disconnection between the rectangular placement frame and the gas pipeline to prevent natural gas leakage when replacing the activated carbon plate; the front part of the rectangular placement frame is provided with a placement component for placing the activated carbon plate; the rear part of the rectangular placement frame is provided with a rear outlet component for removing the activated carbon plate; the placement component and the rear outlet component are combined with each other to tighten and limit the activated carbon plate placed in the rectangular placement frame; the feeding mechanism includes a mounting rod; two linkage components are symmetrically arranged in the upper and lower parts of the mounting box, which are respectively used to drive the two laterally adjacent opening and closing components and the placement component to operate together; a matching unit for driving the linkage component to operate is commonly provided between the mounting rod and the linkage component.

[0013] In a possible implementation, the opening and closing assembly includes a plurality of rotating shafts penetrating and rotatably connected to the transverse section of the door-shaped frame, a baffle is fixedly connected to the outside of the rotating shaft, and complementary splicing grooves are respectively formed on the front and rear sides of the baffle.

[0014] In one possible implementation, the placement component includes a front rectangular box connected to the front of a rectangular placement frame, the front of the front rectangular box is connected to a strip box with a front opening, a strip sealing plate is slidably connected in the strip box, a wedge-shaped pressure block is fixedly connected to the rear end face of the strip sealing plate, and a top spring is fixedly connected between the strip sealing plate and the strip box.

[0015] In one possible implementation, the linkage assembly includes a gear fixedly connected to the end of the rotating shaft away from the partition, a sliding rod fixedly connected to the side of the door frame away from the partition through a fixed block, and a transverse rack slidably connected to the outer wall of the sliding rod and meshing with the gear, a limiting spring is commonly fixedly connected between the outer wall of the sliding rod and the transverse rack, the left wall panel of the installation box is rotatably connected to the rotating shaft, the right end of the rotating shaft is fixedly connected to a winding wheel, the two transverse racks are commonly fixedly connected to a connecting frame at the side away from the door frame, a No. 1 cable is commonly fixedly connected between the connecting frame and the winding wheel, a No. 2 cable is fixedly connected to the side of the strip sealing plate away from the partition, and the end of the No. 2 cable passes through the strip box and is fixedly connected to the outside of the winding wheel.

[0016] In a possible implementation, the feeding mechanism also includes an electric slider slidably connected to the upper end surface of the support platform, the upper end surface of the electric slider is fixedly connected to an annular frame, a ring is rotatably connected in the annular frame, a plurality of pairs of slide boxes are fixedly connected to the left end surface of the ring at equidistant intervals in the circumference, each of the slide boxes is provided with a strip groove in the long section wall plate, a push column is slidably connected in the strip groove, a return spring is fixedly connected between the push column and the strip groove, the upper end surface of the electric slider is fixedly connected to an electric telescopic rod, the mounting rod is fixedly connected to the upper end of the electric telescopic rod, and the right end surface of the mounting rod is fixedly connected to an inclined pressure rod cooperating with the push column.

[0017] In one possible implementation, the mating unit includes a gear ring that is sleeved and connected to the outside of the rotating shaft, and a plurality of grooves are circumferentially and equidistantly provided on the left end surface of the gear ring. A compression spring is fixedly connected to the side of the groove away from the rotating shaft, and an end of the compression spring close to the rotating shaft is fixedly connected to an arc-shaped piece that contacts the outer wall of the rotating shaft, and a longitudinal rack for mating with the gear ring is fixedly connected to the lower end surface of the mounting rod.

[0018] In a possible implementation, a plurality of stop rods corresponding to the alternating replacement parts and used for limiting the position of the slide box are equidistantly fixedly connected to the upper end surface of the support platform.

[0019] In a possible implementation, the rear outlet component includes a rear rectangular box connected to the rear of the rectangular placement frame, the left and right sides of the rear rectangular box are connected to a strip box, a wedge-shaped valve plate is slidably connected in the strip box, and a leaf spring that contacts the wedge-shaped valve plate is fixedly connected to one side of the strip box close to the wedge-shaped valve plate.

[0020] It can be seen from the above technical solutions that the present invention has the following advantages:

[0021] In the present invention, the activated carbon plates in the upper and lower rectangular placement frames are replaced in sequence: when one of the activated carbon plates is replaced, the rectangular placement frame where the replaced activated carbon plate is located is closed, which effectively prevents the risk of natural gas leakage, improves the safety during the replacement process, and ensures the sealing during replacement, while the other activated carbon plate maintains a normal filtering state, so that the natural gas transmission and processing can continue without cutting off the gas, thereby improving the natural gas processing efficiency.

[0022] In the present invention, the feeding mechanism and the alternating replacement part are combined with each other, and when the activated carbon plates are replaced, they are moved horizontally to the outside of the alternating replacement part in sequence for replacement, thereby facilitating the replacement of multiple activated carbon filter units in sequence, simplifying the replacement process, avoiding frequent gas interruption steps, and further accelerating the processing speed of natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 This is a process diagram for the low-temperature plus normal-temperature adsorption dehydrogenation of natural gas provided by the present invention.

[0025] Figure 2 The present invention provides an overall structural diagram.

[0026] Figure 3 It is a partial structural cross-sectional schematic diagram of the present invention.

[0027] Figure 4 A schematic cross-sectional view of a portion of the structure of the uninterrupted dust removal mechanism provided by the present invention.

[0028] Figure 5 This is a schematic diagram of the disassembly of the connection structure between the rectangular placement frame and the door-shaped frame provided by the present invention.

[0029] Figure 6 This is a partial structural schematic diagram of the alternating replacement part provided by the present invention.

[0030] Figure 7 The present invention provides Figure 6 Schematic diagram of the enlarged structure of part A in the figure.

[0031] Figure 8 The present invention provides Figure 6Schematic diagram of the enlarged structure of part B.

[0032] Fig. 9 A cross-sectional schematic diagram of the connection structure between the rectangular placement frame and the placement component provided by the present invention.

[0033] Fig.10 This is a schematic cross-sectional structural diagram of the rear-ejection component provided by the present invention.

[0034] The above drawings include the following reference numerals:

[0035] 1. Support platform; 2. Feeding mechanism; 21. Mounting rod; 22. Electric slider; 23. Ring frame; 24. Ring; 25. Sliding box; 26. Push column; 27. Strip groove; 28. Electric telescopic rod; 29. ​​Oblique pressure rod; 3. Uninterrupted dust removal mechanism; 31. Air pipe; 32. Alternating replacement part; 321. Mounting box; 322. Partition; 323. Rectangular placement frame; 324. Door frame; 325. Opening and closing assembly; 3251. Rotating shaft; 3252. Baffle; 3253. Splicing groove; 326. Inserting assembly; 3261. Front rectangular box; 3262. Strip box; 326 3. Strip sealing plate; 3264. Wedge-shaped pressure block; 3265. Top spring; 327. Rear outlet assembly; 3271. Rear rectangular box; 3272. Strip box; 3273. Wedge-shaped valve plate; 3274. Leaf spring; 328. Linkage assembly; 3281. Gear; 3282. Sliding rod; 3283. Horizontal rack; 3284. Rotating shaft; 3285. Reel; 3286. Connecting frame; 3287. No. 1 cable; 3288. No. 2 cable; 329. Matching unit; 3291. Gear ring; 3292. Pressure spring; 3293. Arc sheet; 3294. Longitudinal rack; 4. Top stop rod. DETAILED DESCRIPTION

[0036] 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 in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0037] See also Figure 1 and Figure 2 The present invention provides a technical solution: a natural gas low temperature plus room temperature adsorption dehydrogenation process, the specific steps of the natural gas low temperature plus room temperature adsorption dehydrogenation process are as follows:

[0038] S1. Activated carbon adsorption treatment: The dehydrated natural gas is passed through an activated carbon filter for activated carbon adsorption treatment to remove solid particles in the natural gas.

[0039] S2. Mercury removal treatment: The natural gas after the activated carbon adsorption treatment enters the mercury removal tower from the top of the tower for mercury removal treatment.

[0040] S3. Low temperature cooling treatment: The natural gas after the mercury removal treatment is subjected to low temperature cooling treatment by a low temperature cooling system to remove hydrocarbons that are easily separated by cooling, wherein the low temperature cooling system adopts a propane refrigerant or an ethylene refrigerant circulating refrigeration system.

[0041] S4. Heavy hydrocarbon removal treatment: The natural gas after low-temperature cooling treatment enters the heavy hydrocarbon adsorber for heavy hydrocarbon removal treatment to remove heavy hydrocarbons in the natural gas and ensure that the natural gas reaches the required purity.

[0042] S5. Dust removal: The natural gas that has undergone heavy hydrocarbon removal treatment is subjected to dust removal treatment through the uninterrupted dust removal mechanism 3, and the dust-removed and purified natural gas is sent to the liquefaction system.

[0043] The low-temperature plus normal-temperature adsorption dehydrogenation process steps of natural gas in the above-mentioned steps S1-S5 need to be completed by the support 1, the feeding mechanism 2 and the uninterrupted dust removal mechanism 3 in coordination.

[0044] An uninterrupted dust removal mechanism 3 is installed on the upper end surface of the support platform 1, and a feeding mechanism 2 is installed on the upper part of the support platform 1 for cooperating with the uninterrupted dust removal mechanism 3 to continuously provide activated carbon plates required for placement and replacement.

[0045] See also Figure 2 , Figure 3 , Figure 4 and Figure 5In this embodiment, the uninterrupted dust removal mechanism 3 includes a gas pipe 31 fixedly connected through a support plate and a plurality of alternating replacement parts 32 equidistantly arranged on the gas pipe 31 along the axial direction for alternately replacing activated carbon plates to facilitate continuous and uninterrupted transportation of natural gas. The alternating replacement part 32 includes a mounting box 321 embedded in the gas pipe 31 and a partition 322 fixedly connected to the middle between the front and rear cavity walls of the mounting box 321. The upper and lower sides of the partition 322 are respectively fixedly connected with rectangular placement frames 323 for placing activated carbon plates. The left and right end surfaces of the rectangular placement frame 323 are respectively fixedly connected with door-shaped frames 324. The door-shaped frame 324 is provided with a control mechanism for controlling the connection and disconnection of the rectangular placement frame 323 with the gas pipe 31 to prevent more An opening and closing component 325 is provided to prevent natural gas leakage when replacing the activated carbon plate. A placing component 326 for placing the activated carbon plate is provided at the front of the rectangular placing frame 323. A rear outlet component 327 for removing the activated carbon plate is provided at the rear of the rectangular placing frame 323. The placing component 326 and the rear outlet component 327 are combined with each other to tighten and limit the activated carbon plate placed in the rectangular placing frame 323. The feeding mechanism 2 includes a mounting rod 21. Two linkage components 328 are symmetrically arranged in the mounting box 321, which are respectively used to drive the two laterally adjacent opening and closing components 325 and the placing component 326 to operate together. A matching unit 329 for driving the linkage component 328 to operate is provided between the mounting rod 21 and the linkage component 328.

[0046] See also Figure 4 , Figure 5 , Figure 6 and Figure 8 The opening and closing assembly 325 includes a plurality of rotating shafts 3251 that penetrate and are rotatably connected to the transverse section of the door-shaped frame 324. A baffle 3252 is fixedly connected to the outside of the rotating shaft 3251. The front and rear sides of the baffle 3252 are respectively provided with complementary splicing grooves 3253.

[0047] See also Figure 5 , Figure 6 and Fig. 9 The placement component 326 includes a front rectangular box 3261 connected to the front part of the rectangular placement frame 323, the front part of the front rectangular box 3261 is connected to a strip box 3262 with a front opening, a strip sealing plate 3263 is slidably connected in the strip box 3262, a wedge-shaped pressure block 3264 is fixedly connected to the rear end face of the strip sealing plate 3263, and a top spring 3265 is fixedly connected between the strip sealing plate 3263 and the strip box 3262.

[0048] See also Figure 5 , Figure 6 , Fig. 9 and Fig.10The rear outlet component 327 includes a rear rectangular box 3271 connected to the rear part of the rectangular placement frame 323, and the left and right sides of the rear rectangular box 3271 are connected to the strip box 3272, and a wedge-shaped valve plate 3273 is slidably connected in the strip box 3272. A leaf spring 3274 that contacts the wedge-shaped valve plate 3273 is fixedly connected to one side of the strip box 3272 close to the wedge-shaped valve plate 3273.

[0049] See also Figure 4 , Figure 6 and Fig. 9 The linkage assembly 328 includes a gear 3281 fixedly connected to the end of the rotating shaft 3251 away from the partition 322, a slide bar 3282 fixedly connected to the side of the door frame 324 away from the partition 322 through a fixed block, and a horizontal rack 3283 slidably connected to the outer wall of the slide bar 3282 and meshing with the gear 3281. A limit spring is fixedly connected between the outer wall of the slide bar 3282 and the horizontal rack 3283. The left wall plate of the installation box 321 is rotatably connected to the rotating shaft 32 84. A reel 3285 is fixedly connected to the right end of the rotating shaft 3284. A connecting frame 3286 is commonly fixedly connected to the two transverse racks 3283 on the side away from the door frame 324. A No. 1 cable 3287 is commonly fixedly connected between the connecting frame 3286 and the reel 3285. A No. 2 cable 3288 is fixedly connected to the side of the strip sealing plate 3263 away from the partition 322. The end of the No. 2 cable 3288 passes through the strip box 3262 and is fixedly connected to the outside of the reel 3285.

[0050] See also Figure 3 , Figure 4 , Figure 6 and Figure 7 The mating unit 329 includes a gear ring 3291 which is sleeved and connected to the outside of the rotating shaft 3284. A plurality of grooves are equidistantly arranged on the left end surface of the gear ring 3291 in the circumferential direction. A compression spring 3292 is fixedly connected to the side of the groove away from the rotating shaft 3284. An end of the compression spring 3292 close to the rotating shaft 3284 is fixedly connected to an arc-shaped piece 3293 which contacts the outer wall of the rotating shaft 3284. A longitudinal rack 3294 for mating with the gear ring 3291 is fixedly connected to the lower end surface of the mounting rod 21.

[0051] Natural gas is introduced from the left end of the gas pipe 31 to make it flow to the right. The natural gas entering the gas pipe 31 passes through the activated carbon plates in the alternating replacement section 32 from left to right in sequence. The activated carbon filter unit in the alternating replacement section 32 on the left will be saturated first. Then, when the saturated activated carbon in the alternating replacement section 32 on the left needs to be replaced, the cloth mechanism is moved to the position of the alternating replacement section 32 on the left.

[0052] Then, the linkage assembly 328 is operated through the matching unit 329: the mounting rod 21 drives the longitudinal rack 3294 to move downward, and the longitudinal rack 3294 will first mesh with the gear ring 3291 located at the upper part during the downward movement, and the gear ring 3291 at the upper part is driven to rotate, and the gear ring 3291 then drives the rotating shaft 3284 to rotate synchronously by contacting the arc-shaped piece 3293 outside the rotating shaft 3284, and the rotating shaft 3284 then drives the reel 3285 to rotate, and the reel 3285 rotates to respectively pull the No. 1 cable 3287 and the No. 2 cable 3288 8 are wound up and retracted one by one, and the No. 1 cable 3287 then drives the horizontal rack 3283 to move through the connecting frame 3286, and the horizontal rack 3283 then drives the rotating shaft 3251 to rotate through the gear 3281, and then drives the baffle 3252 to rotate, so that the two adjacent baffles 3252 are abutted and spliced ​​together, and the splicing grooves 3253 on the side walls of the two adjacent baffles 3252 are connected to each other, cutting off the communication between the rectangular placement frame 323 and the inner cavity of the gas transmission pipe 31, and stopping the natural gas from entering the rectangular placement frame 323 at the upper part. When the No. 2 cable 3288 is wound up and retracted, it pulls the strip sealing plate 3263 to move in the direction away from the partition 322, so that the opening at the front of the front rectangular box 3261 is gradually opened.

[0053] Then, the longitudinal rack 3294 continues to move downward, driving the gear ring 3291 to rotate continuously. After the baffle 3252 is completely closed and the front opening of the front rectangular box 3261 is completely opened, the No. 1 cable 3287 and the No. 2 cable 3288 are also wound and retracted to the shortest state. At this time, the gear ring 3291 drives the arc piece 3293 and the rotating shaft 3284 to change from a relatively static state to a relatively sliding state. That is, the rotating shaft 3284 stops rotating at this time, and the gear ring 3291 drives the arc piece 3293 to rotate outside. The feeding mechanism 2 then pushes the new activated carbon plate into the front rectangular box 3261 which is fully opened at the top. The new activated carbon plate is pushed to the right, pushing the saturated activated carbon plate in the rectangular placement frame 323 to move backward. Then the saturated activated carbon plate moves backward and hits the inclined surface of the wedge valve plate 3273, thereby squeezing the wedge valve plate 3273 to move away from each other, until the new activated carbon plate is completely entered into the rectangular placement frame 323, and at the same time, the saturated activated carbon plate is also squeezed out of the rectangular placement frame 323.

[0054] At this time, the longitudinal rack 3294 moves down to separate from the upper gear ring 3291, and then the top spring 3265 is reset and extended to push the strip sealing plate 3263 down to close the front opening of the front rectangular box 3261, and the strip sealing plate 3263 after moving down drives the inclined surface of the wedge-shaped pressure block 3264 to hit the corner position of the activated carbon board after it is placed, and the inclined surfaces of the wedge-shaped pressure block 3264 and the wedge-shaped valve plate 3273 respectively hit the corner positions of the activated carbon board to combine with each other to limit the placed activated carbon board, thereby enhancing the stability of the activated carbon board after replacement; the reset limit spring pulls the transverse rack 3283 to move backward, and the transverse rack 3283 then drives the baffle 3252 to rotate in the opposite direction through the gear 3281 and the rotating shaft 3251, so that the baffle 3252 rotates to an open state, so that the rectangular placement frame 323 can be connected with the inside of the gas supply pipe 31 again. Then the longitudinal rack 3294 moving downward moves down to mesh with the gear ring 3291 in the matching unit 329 located at the bottom, and then repeats the above steps, driving the opening and closing component 325 at the bottom to operate to cut off the connection between the lower rectangular placement frame 323 and the gas pipe 31, and then replace the saturated activated carbon plate at the bottom.

[0055] The activated carbon plates in the upper and lower rectangular placement frames 323 are replaced in sequence: when one of the activated carbon plates is replaced, the rectangular placement frame 323 where the replaced activated carbon plate is located is closed, which effectively prevents the risk of natural gas leakage, ensures the sealing during replacement, and greatly improves the safety during the replacement process. The other activated carbon plate maintains a normal filtering state, so that the natural gas transmission and processing can continue, thereby improving the natural gas processing efficiency.

[0056] See also Figure 2 and Figure 3 In this embodiment, the feeding mechanism 2 also includes an electric slider 22 slidably connected to the upper end surface of the support platform 1, and the upper end surface of the electric slider 22 is fixedly connected to an annular frame 23, and a ring ring 24 is rotatably connected in the annular frame 23. A plurality of pairs of slide boxes 25 are fixedly connected to the left end surface of the ring ring 24 at equal intervals in the circumferential direction, and each slide box 25 is provided with a strip groove 27 in the long section wall plate, and a push column 26 is slidably connected in the strip groove 27. A return spring is fixedly connected between the push column 26 and the strip groove 27, and an electric telescopic rod 28 is fixedly connected to the upper end surface of the electric slider 22, and the mounting rod 21 is fixedly connected to the upper end of the electric telescopic rod 28. The right end surface of the mounting rod 21 is fixedly connected to an inclined pressure rod 29 cooperating with the push column 26, and a plurality of stop rods 4 corresponding to the alternating replacement part 32 and used to limit the slide box 25 are fixedly connected to the upper end surface of the support platform 1 at equal intervals.

[0057] Slide a new activated carbon plate into the slide box 25. When the activated carbon plates in the alternating replacement part 32 need to be replaced in turn, rotate the ring 24 to drive the slide box 25 to rotate, so that the slide box 25 rotated to the front is adjusted to a horizontal state, and then control the electric slider 22 to move horizontally to drive the annular frame 23 to move horizontally. The annular frame 23 then drives the ring 24 to move in turn to the position of the alternating replacement part 32 where the activated carbon plate needs to be replaced. At this time, the lower end surface of the slide box 25 located at the front bottom abuts against the upper end of the stop rod 4. Then control the electric telescopic rod 28 to contract and drive the mounting rod 21 to move downward. The mounting rod 21 then drives the longitudinal rack 3294 to move downward. The longitudinal rack 3294 moves downward and meshes with the gear ring 3291 to make the matching unit 329 operate.

[0058] When the matching unit 329 drives the front opening of the front rectangular box 3261 in the placing assembly 326 to be fully opened through the linkage assembly 328, the installation rod 21 drives the inclined pressure rod 29 to move down to the position where it conflicts with the push rod located at the upper part, and the inclined pressure rod 29 then squeezes the push column 26, squeezing the push column 26 to move toward the center of the ring 24, and the push column 26 then pushes the activated carbon plate toward the center of the ring 24, so that the activated carbon plate enters the front rectangular box 3261 and then enters the rectangular placement frame 323, so that the activated carbon can be placed. The plates are filled and placed in the rectangular placement frame 323 at the top; when the mounting rod 21 moves downward, driving the longitudinal rack 3294 to mesh with the gear ring 3291 at the bottom and making the front opening of the front rectangular box 3261 at the bottom open, the inclined pressure rod 29 will be driven downward to contact with the lower push column 26, and then the lower push column 26 will be squeezed to move it, pushing the activated carbon plate in the lower slide box 25 into the rectangular placement frame 323 at the bottom, so as to quickly complete the replacement of the activated carbon plate, facilitate the continuous replacement of the activated carbon plate, and simplify the replacement steps.

[0059] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A natural gas low temperature plus room temperature adsorption dehydrogenation process, characterized in that: The specific steps of the natural gas low temperature plus room temperature adsorption dehydrogenation process are as follows: S1. Activated carbon adsorption treatment: The dehydrated natural gas is passed through an activated carbon filter for activated carbon adsorption treatment to remove solid particles in the natural gas; S2, mercury removal treatment: the natural gas after the activated carbon adsorption treatment enters the mercury removal tower from the top of the tower for mercury removal treatment; S3. Low temperature cooling treatment: The natural gas after the mercury removal treatment is subjected to low temperature cooling treatment by a low temperature cooling system to remove hydrocarbons that are easily separated by cooling, wherein the low temperature cooling system adopts a propane refrigerant or an ethylene refrigerant circulating refrigeration system; S4. Heavy hydrocarbon removal treatment: The natural gas after low temperature cooling is sent to the heavy hydrocarbon adsorber for heavy hydrocarbon removal treatment to remove heavy hydrocarbons in the natural gas and ensure that the natural gas reaches the required purity; S5, dust removal treatment: the natural gas after heavy hydrocarbon removal treatment is subjected to dust removal treatment by an uninterrupted dust removal mechanism (3), and the dust-removed and purified natural gas is sent to the liquefaction system; The low-temperature and normal-temperature adsorption dehydrogenation process of natural gas in the above-mentioned steps S1-S5 needs to be completed by the support (1), the feeding mechanism (2) and the uninterrupted dust removal mechanism (3); wherein: The upper end surface of the support platform (1) is equipped with an uninterrupted dust removal mechanism (3), and the upper part of the support platform (1) is equipped with a feeding mechanism (2) for cooperating with the uninterrupted dust removal mechanism (3) to continuously provide activated carbon plates required for placement and replacement; The uninterrupted dust removal mechanism (3) comprises a gas delivery pipe (31) fixedly connected via a support plate and a plurality of alternating replacement parts (32) equidistantly arranged along the axial direction on the gas delivery pipe (31) for alternately replacing activated carbon plates to facilitate continuous and uninterrupted delivery of natural gas; The alternating replacement unit (32) comprises: An installation box (321) embedded in the gas pipeline (31) and a partition (322) fixedly connected to the middle part between the front and rear walls of the installation box (321), wherein the upper and lower sides of the partition (322) are respectively fixedly connected to rectangular placement frames (323) for placing activated carbon plates, and the left and right end faces of the rectangular placement frame (323) are respectively fixedly connected to door-shaped frames (324), and the door-shaped frame (324) is provided with an opening and closing component (325) for controlling the connection and disconnection between the rectangular placement frame (323) and the gas pipeline (31) to prevent natural gas leakage when replacing the activated carbon plate; The front of the rectangular placement frame (323) is provided with a placement component (326) for placing the activated carbon board, and the rear of the rectangular placement frame (323) is provided with a rear removal component (327) for removing the activated carbon board. The placement component (326) and the rear removal component (327) are combined with each other to tighten and limit the activated carbon board placed in the rectangular placement frame (323); The feeding mechanism (2) comprises a mounting rod (21), and two linkage components (328) are symmetrically arranged in the mounting box (321) and are respectively used to drive two laterally adjacent opening and closing components (325) and a placing component (326) to operate together, and a matching unit (329) is arranged between the mounting rod (21) and the linkage component (328) for driving the linkage component (328) to operate.

2. A natural gas low temperature plus room temperature adsorption dehydrogenation process according to claim 1, characterized in that: The opening and closing assembly (325) comprises a plurality of rotating shafts (3251) penetrating and rotatably connected to the transverse section of the door-shaped frame (324); a baffle (3252) is fixedly connected to the outside of the rotating shaft (3251); and complementary splicing grooves (3253) are respectively provided on the front and rear sides of the baffle (3252).

3. A natural gas low temperature plus room temperature adsorption dehydrogenation process according to claim 2, characterized in that: The placement component (326) includes a front rectangular box (3261) connected to the front of the rectangular placement frame (323); the front of the front rectangular box (3261) is connected to a strip box (3262) with a front opening; a strip sealing plate (3263) is slidably connected in the strip box (3262); a wedge-shaped pressure block (3264) is fixedly connected to the rear end face of the strip sealing plate (3263); and a top spring (3265) is fixedly connected between the strip sealing plate (3263) and the strip box (3262).

4. A natural gas low temperature plus room temperature adsorption dehydrogenation process according to claim 3, characterized in that: The linkage assembly (328) includes a gear (3281) fixedly connected to the end of the rotating shaft (3251) away from the partition (322), a sliding rod (3282) fixedly connected to the side of the door frame (324) away from the partition (322) through a fixing block, and a transverse rack (3283) slidably connected to the outer wall of the sliding rod (3282) and meshing with the gear (3281), a limit spring is fixedly connected between the outer wall of the sliding rod (3282) and the transverse rack (3283), and the left wall plate of the installation box (321) is rotatably connected to the rotating shaft (3284). The right end of the rotating shaft (3284) is fixedly connected to a reel (3285); the two transverse racks (3283) are fixedly connected to a connecting frame (3286) on the side away from the door frame (324); a first cable (3287) is fixedly connected between the connecting frame (3286) and the reel (3285); a second cable (3288) is fixedly connected to the side of the strip sealing plate (3263) away from the partition (322); an end of the second cable (3288) passes through the strip box (3262) and is fixedly connected to the outside of the reel (3285).

5. The process for dehydrocarbonation of natural gas by low-temperature and normal-temperature adsorption according to claim 1, characterized in that: The feeding mechanism (2) further comprises an electric slider (22) slidably connected to the upper end surface of the support platform (1); the upper end surface of the electric slider (22) is fixedly connected to an annular frame (23); a ring (24) is rotatably connected in the annular frame (23); a plurality of pairs of slide boxes (25) are fixedly connected to the left end surface of the ring (24) at equal intervals in the circumferential direction; a strip groove (27) is provided on the long section wall plate of each slide box (25); a push column (26) is slidably connected in the strip groove (27); a return spring is fixedly connected between the push column (26) and the strip groove (27); the upper end surface of the electric slider (22) is fixedly connected to an electric telescopic rod (28); the mounting rod (21) is fixedly connected to the upper end of the electric telescopic rod (28); and the right end surface of the mounting rod (21) is fixedly connected to an oblique pressure rod (29) cooperating with the push column (26).

6. A natural gas low temperature plus room temperature adsorption dehydrogenation process according to claim 4, characterized in that: The mating unit (329) includes a gear ring (3291) sleeved and connected to the outside of the rotating shaft (3284), and a plurality of grooves are equidistantly arranged on the left end surface of the gear ring (3291) in the circumferential direction, and a compression spring (3292) is fixedly connected to the side of the groove away from the rotating shaft (3284), and an end of the compression spring (3292) close to the rotating shaft (3284) is fixedly connected to an arc-shaped piece (3293) that contacts the outer wall of the rotating shaft (3284), and a longitudinal rack (3294) for mating with the gear ring (3291) is fixedly connected to the lower end surface of the mounting rod (21).

7. A natural gas low temperature plus room temperature adsorption dehydrogenation process according to claim 5, characterized in that: The upper end surface of the support platform (1) is equidistantly and fixedly connected with a plurality of stop rods (4) corresponding to the alternating replacement parts (32) and used for limiting the position of the slide box (25).

8. The process for dehydrocarbonation of natural gas by low-temperature and normal-temperature adsorption according to claim 1, characterized in that: The rear outlet assembly (327) comprises a rear rectangular box (3271) connected to the rear of the rectangular placement frame (323); the left and right sides of the rear rectangular box (3271) are both connected to a strip box (3272); a wedge-shaped valve plate (3273) is slidably connected to the strip box (3272); a leaf spring (3274) that contacts the wedge-shaped valve plate (3273) is fixedly connected to one side of the strip box (3272) close to the wedge-shaped valve plate (3273).

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