CO cryogenic separation vent gas recovery device

Abstract

The utility model relates to a CO cryogenic separation vent gas recovery device, and belongs to the technical field of CO cryogenic separation. The CO cryogenic separation vent gas recovery device comprises a main gas pipe, a plurality of separation pipes are fixedly installed on the surface of the main gas pipe, a control valve is fixedly installed on the surface of the main gas pipe, and a main torch is fixedly installed at the other end of the main gas pipe; the flow guide buffering mechanism is used for buffering and stabilizing the pressure of the recycled gas and is arranged on one side of the main gas pipe; during use, recycled gas can be guided into the pressure buffering assembly through the guide-in pipe, the internal structure conducts multi-stage disturbance and kinetic energy dissipation on the gas, it is ensured that tail gas entering the recycling system has the stable flow speed and pressure, and the gas subjected to buffering and pressure reduction is input into the recycling device to be recycled; and the recovery device can be conveniently moved downwards, slid, disassembled and maintained through the overhauling assembly, so that the recovered objects can be conveniently collected and cleaned.

Description

Technical Field

[0001] This utility model relates to the field of CO cryogenic separation technology, and in particular to a CO cryogenic separation venting and recovery device. Background Technology

[0002] With the development of coal chemical engineering, syngas production, methanol synthesis, and other processes, CO (carbon oxide), as an important intermediate gas, has become a crucial link in improving feedstock utilization efficiency and reducing carbon emissions through its separation and recovery. In cryogenic CO separation systems, multiple component gases are typically separated simultaneously, including hydrogen-rich gas, CO product gas, flash vapor, and crude methane gas. Due to process fluctuations or pressure regulation requirements, some product gases cannot be immediately fed into downstream systems for utilization and often need to be discharged through venting routes.

[0003] As shown in the reference case "A CO Cryogenic Separation and Emission Recovery Device" (Announcement No. CN219222091U), the device is directly connected to the main gas pipe via a gas distribution pipe. A gas pump draws the separated gas from the main gas pipe, reducing the total amount of gas emitted during combustion at the main flare, effectively minimizing gas waste. Furthermore, the recovered gas can be used for methanol synthesis and reuse, improving the recovery and utilization rate of the separated gas.

[0004] Currently, most exhaust gas recovery devices, although possessing a basic structure consisting of an air pump and an air storage tank, are mainly used for bypass regulation at the front end of the flare system. They are difficult to maintain steady-state linkage with the front end of the cryogenic separation system. Especially in the case of large-volume, low-temperature, and high-flow-rate venting air impact, existing devices generally lack effective buffering and pressure stabilization capabilities, making it difficult to ensure the continuous and stable operation of the recovery system, and may even lead to further waste of exhaust gas resources. Utility Model Content

[0005] Based on this, it is necessary to address the problem that existing devices generally lack effective buffering and pressure stabilization capabilities under conditions of large volume, low temperature, and high flow rate vent gas impact, making it difficult to ensure the continuous and stable operation of the recovery system and potentially causing further waste of exhaust gas resources. To address this, a CO cryogenic separation vent gas recovery device is provided, comprising: a main gas pipe, on the surface of which multiple separation pipes are fixedly installed, a control valve is fixedly installed on the surface of which, and a main flare is fixedly installed at the other end of which; a flow guiding and buffering mechanism, used for buffering and stabilizing the recovered gas, is disposed on one side of the main gas pipe; wherein, the flow guiding and buffering mechanism includes an inlet pipe fixedly installed on the surface of the main gas pipe, a pressure-reducing component is disposed at the other end of which, and a maintenance component is disposed on the other side of the pressure-reducing component.

[0006] The pressure relief assembly includes a buffer shell fixedly installed at the other end of the inlet tube. The buffer shell is cylindrical in shape. The other end of the inlet tube is located at the bottom of the buffer shell. A delivery tube is fixedly installed at the top of the buffer shell. An enrichment device is provided at the other end of the delivery tube. Multiple partitions are provided inside the buffer shell.

[0007] The partitions are all disc-shaped, each with an opening on one side, and are arranged in an alternating manner.

[0008] The bottom of each of the partitions is sloping, and a guide ring is fixedly installed inside the buffer shell. The bottom inner edge of the guide ring is sloping.

[0009] A movable tube is slidably installed inside the buffer shell, and multiple partitions are fixedly installed inside the movable tube. A spring is fixedly installed at the top of the movable tube, and the top of the spring is fixedly connected to the inner top wall of the buffer shell.

[0010] A telescopic sealing ring is provided on the outer side of the spring, and the two ends of the telescopic sealing ring are fixedly connected to the movable tube and the inner top wall of the buffer shell, respectively.

[0011] The maintenance assembly includes support frames disposed on both sides of the enrichment device. An installation frame is slidably installed inside the two support frames. The enrichment device is slidably installed on the top of the installation frame. A screw is fixedly installed at the bottom of the installation frame. A drive tube is rotatably installed between the two support frames. The drive tube is sleeved on the outside of the screw and threadedly connected to the screw. The top of the enrichment device is slidably connected to the other end of the delivery tube.

[0012] A sealing ring is fixedly installed on the top of the enrichment device and on the outer side of the other end of the delivery pipe. The two sealing rings abut against each other. An exhaust pipe is fixedly installed on the outer side of the enrichment device, and the other end of the exhaust pipe is slidably connected to the main gas pipe. Beneficial effects

[0013] The above-mentioned CO cryogenic separation and air recovery device.

[0014] 1. During use, the recovered gas can be introduced into the pressure-reducing component through the inlet pipe. The internal structure performs multi-stage disturbance and kinetic energy dissipation on the gas, ensuring that the exhaust gas entering the recovery system has a stable flow rate and pressure. The buffered and depressurized gas is then input into the recovery device for recovery. The maintenance component allows for easy lowering, sliding, disassembly, and maintenance of the recovery device, thus facilitating the collection and cleaning of the recovered materials.

[0015] 2. When maintenance is required, the drive tube and the corresponding screw thread are rotated to move the mounting frame downwards, which in turn moves the enrichment device downwards until the top of the enrichment device slides apart from the conveying pipe. Then the enrichment device can be slid apart from the mounting frame, allowing for quick disassembly and maintenance of the enrichment device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the flow guiding and buffering mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the buffer shell of this utility model;

[0020] Figure 4 This is a schematic diagram of the maintenance component structure of this utility model.

[0021] Figure label:

[0022] 100. Main air pipe; 110. Separator pipe; 120. Control valve; 200. Main flare; 300. Flow guiding and buffering mechanism; 310. Inlet pipe; 320. Pressure relief assembly; 321. Buffer shell; 322. Partition plate; 323. Movable pipe; 324. Spring; 325. Telescopic sealing ring; 326. Delivery pipe; 327. Enrichment device; 328. Guide ring; 330. Maintenance assembly; 331. Support frame; 332. Mounting frame; 333. Screw; 334. Drive pipe; 335. Sealing ring; 336. Exhaust pipe. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0028] The following is combined Figures 1-4 This invention describes a CO cryogenic separation and air recovery device.

[0029] In one embodiment, a CO cryogenic separation and venting recovery device includes: a main gas pipe 100, with a plurality of separation pipes 110 fixedly installed on the surface of the main gas pipe 100, a control valve 120 fixedly installed on the surface of the main gas pipe 100, and a main flare 200 fixedly installed at the other end of the main gas pipe 100; a flow guiding and buffering mechanism 300, which is disposed on one side of the main gas pipe 100 for buffering and stabilizing the recovered gas; wherein, the flow guiding and buffering mechanism 300 includes an inlet pipe 310 fixedly installed on the surface of the main gas pipe 100, a pressure relief component 320 disposed at the other end of the inlet pipe 310, and a maintenance component 330 disposed on the other side of the pressure relief component 320.

[0030] In this embodiment, during use, the recovered gas can be introduced into the pressure-reducing component 320 through the inlet pipe 310. The internal structure performs multi-stage disturbance and kinetic energy dissipation on the gas, ensuring that the exhaust gas entering the recovery system has a stable flow rate and pressure, and inputting the buffered and depressurized gas into the recovery device for recovery. The recovery device can be easily disassembled and repaired by sliding down through the maintenance component 330, thereby facilitating the collection and cleaning of the recovered materials.

[0031] It should be noted that existing cryogenic separation venting and recovery devices typically include a main gas pipe 100, a branch gas distribution line, a gas pump, a gas storage tank, and an emission path connected to the main flare 200. The pressure-reducing component 320 is connected to the inlet pipe 310 and only works when the gas is guided to the recovery system, without changing the direction of the main airflow path. The maintenance component 330 is located at the end or side of the pressure-reducing component 320 and is used to assist in the maintenance and replacement of the structure. The installation position is located in the branch outlet section of the main gas pipe 100 and only acts on the internal pressure stabilization process of the recovery path, without interfering with the normal delivery of the main gas pipe 100 and the combustion process of the main flare 200.

[0032] like Figure 2 , Figure 3 and Figure 4 As shown, the pressure relief assembly 320 includes a buffer shell 321 fixedly installed at the other end of the inlet pipe 310. The buffer shell 321 is cylindrical in shape. The other end of the inlet pipe 310 is located at the bottom of the buffer shell 321. A delivery pipe 326 is fixedly installed on the top of the buffer shell 321. An enrichment device 327 is provided at the other end of the delivery pipe 326. Multiple partitions 322 are provided inside the buffer shell 321.

[0033] In this embodiment, during use, the vented air can be introduced through the inlet pipe 310. When the vented air passes through the inside of the buffer shell 321, it comes into contact with multiple baffles 322. The gas impact is slowed down and stabilized by the multiple staggered baffles 322. The gas flows in an S-shape between the multiple staggered baffles 322 and flows from bottom to top. Finally, it enters the inside of the top conveying pipe 326 and then enters the inside of the enrichment device 327. After the vented gas is recovered by the enrichment device 327, it is then input into the inside of the main gas pipe 100 and the exhaust gas is burned by the main torch 200.

[0034] It should be noted that the enrichment device 327 is located at the end of the conveying pipe 326 at the top of the buffer shell 321. It is used to enrich and recover effective gases from the vented air after depressurization. It includes an air inlet, an adsorption chamber, a separation component, and an exhaust port. The interior can be equipped with an activated carbon adsorption layer, a molecular sieve structure, or a selective permeable membrane component to achieve directional adsorption and separation of usable components such as CO and H2, while retaining an exhaust channel for unused components. During use, the vented air enters the buffer shell 321 through the inlet pipe 310 and is decelerated and disturbed. Then, it enters the enrichment device 327 from the top conveying pipe 326. When the gas flows through the separation unit inside the device, the target gas components are adsorbed or enriched. Subsequently, it can be introduced into the downstream methanol synthesis or gas storage system. The remaining tail gas is introduced into the main flare 200 for combustion treatment through the exhaust pipe 336, realizing the resource utilization of vented air and the staged emission of tail gas.

[0035] Multiple partitions 322 are all designed in the shape of discs, and each partition 322 has an opening on one side. The multiple partitions 322 are arranged in an alternating manner.

[0036] In this embodiment, the multiple partitions 322 are in the shape of discs. When air is released, the disc shape increases the contact area with the gas, so that more gas can come into contact with the partitions 322 when entering the buffer shell 321 for buffering.

[0037] The bottom of each of the multiple partitions 322 is set as a slope, and a guide ring 328 is fixedly installed inside the buffer shell 321. The bottom inner edge of the guide ring 328 is set as a slope.

[0038] In this embodiment, when the gas enters, it contacts the inclined bottom of the partition 322, thereby reducing the impact of the airflow on the partition 322 and guiding the airflow to flow towards the opening.

[0039] A movable tube 323 is slidably installed inside the buffer shell 321. Multiple partitions 322 are fixedly installed inside the movable tube 323. A spring 324 is fixedly installed at the top of the movable tube 323, and the top of the spring 324 is fixedly connected to the inner top wall of the buffer shell 321.

[0040] In this embodiment, when the partition 322 is impacted, the movable tube 323 moves synchronously, thereby squeezing the spring 324. The spring 324 is compressed to buffer the partition 322, which can reduce the impact wear on the partition 322 and thus extend the service life of the partition 322.

[0041] A telescopic sealing ring 325 is provided on the outer side of the spring 324. The two ends of the telescopic sealing ring 325 are fixedly connected to the movable tube 323 and the inner top wall of the buffer shell 321, respectively.

[0042] In this embodiment, the telescopic sealing ring 325 can deform synchronously with the spring 324, thereby always sealing and protecting the spring 324 and preventing the spring 324 from contacting the outside, thus avoiding the impact of external influences on normal use.

[0043] like Figure 2 and Figure 4 As shown, the maintenance assembly 330 includes support frames 331 disposed on both sides of the enrichment device 327. An installation frame 332 is slidably installed inside the two support frames 331. The enrichment device 327 is slidably installed on the top of the installation frame 332. A screw 333 is fixedly installed at the bottom of the installation frame 332. A drive tube 334 is rotatably installed between the two support frames 331. The drive tube 334 is sleeved on the outside of the screw 333 and threadedly connected to the screw 333. The top end of the enrichment device 327 is slidably connected to the other end of the delivery tube 326.

[0044] In this embodiment, when maintenance is required, the drive tube 334 is rotated and the corresponding screw 333 is threaded, thereby driving the mounting frame 332 to move down, and simultaneously driving the enrichment device 327 to move down, until the top of the enrichment device 327 slides apart from the delivery tube 326, then the enrichment device 327 can be slidably separated from the mounting frame 332, thereby allowing for quick disassembly and maintenance of the enrichment device 327.

[0045] A sealing ring 335 is fixedly installed on the top of the enrichment device 327 and on the outer side of the other end of the delivery pipe 326. The two sealing rings 335 abut against each other. An exhaust pipe 336 is fixedly installed on the outer side of the enrichment device 327. The other end of the exhaust pipe 336 is slidably connected to the main air pipe 100.

[0046] In this embodiment, when the drive tube 334 drives the mounting frame 332 to move upward via the screw 333, the enrichment device 327 simultaneously drives the top sealing ring 335 to seal and abut against the sealing ring 335 at the other end of the delivery tube 326, thereby increasing the sealing performance of the installation connection between the enrichment device 327 and the delivery tube 326. The sliding connection between the exhaust pipe 336 and the main air pipe 100 can also be separated from the main air pipe 100 as the enrichment device 327 slides up and down.

[0047] Working principle: During use, the vented air is introduced through the inlet pipe 310. When the vented air passes through the buffer shell 321, it comes into contact with multiple baffles 322. The gas impact is slowed down and stabilized by the multiple staggered baffles 322. The gas flows in an S-shape between the multiple staggered baffles 322 and flows from bottom to top, eventually entering the top conveying pipe 326 and then into the enrichment device 327. After the enrichment device 327 recovers the vented gas, it is then fed into the main gas pipe 100 and burned by the main torch 200. When maintenance is required, the drive pipe 334 is rotated and the corresponding screw 333 moves threadedly, thereby driving the mounting frame 332 to move down, and simultaneously driving the enrichment device 327 down until the top of the enrichment device 327 slides apart from the conveying pipe 326. Then the enrichment device 327 can be slidably separated from the mounting frame 332, thereby quickly disassembling and maintaining the enrichment device 327.

[0048] It should be noted that the control valve, main flare, and enrichment device mentioned above are all devices with relatively mature existing technologies. The specific models can be selected according to actual needs. At the same time, the control valve, main flare, and enrichment device can be powered by the built-in power supply or by the mains power. The specific power supply method will be selected according to the situation and will not be elaborated here.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A CO cryogenic separation vent gas recovery apparatus, characterized by, include: A main air pipe (100) is provided with a plurality of separation pipes (110) fixedly installed on its surface. A control valve (120) is fixedly installed on the surface of the main air pipe (100). A main torch (200) is fixedly installed at the other end of the main air pipe (100). A flow-guiding buffer mechanism (300) is provided on one side of the main gas pipe (100) for buffering and stabilizing the recovered gas. The flow-guiding buffer mechanism (300) includes an inlet pipe (310) fixedly installed on the surface of the main air pipe (100), and a pressure-relieving component (320) is provided at the other end of the inlet pipe (310), and a maintenance component (330) is provided on the other side of the pressure-relieving component (320).

2. The CO cryogenic separation vent gas recovery apparatus according to claim 1, wherein, The pressure relief assembly (320) includes a buffer shell (321) fixedly installed at the other end of the inlet tube (310). The buffer shell (321) is cylindrical. The other end of the inlet tube (310) is located at the bottom of the buffer shell (321). A delivery tube (326) is fixedly installed on the top of the buffer shell (321). An enrichment device (327) is provided at the other end of the delivery tube (326). Multiple partitions (322) are provided inside the buffer shell (321).

3. The CO cryogenic separation vent gas recovery apparatus according to claim 2, wherein, The multiple partitions (322) are all configured as discs, and each of the multiple partitions (322) has an opening on one side. The multiple partitions (322) are arranged in an alternating manner.

4. The CO cryogenic separation vent gas recovery apparatus according to claim 3, wherein, The bottom of each of the partitions (322) is set as a slope, and a guide ring (328) is fixedly installed inside the buffer shell (321). The bottom inner edge of the guide ring (328) is set as a slope.

5. The CO cryogenic separation vent gas recovery apparatus according to claim 4, wherein, The buffer shell (321) has a movable tube (323) slidably installed inside, and multiple partitions (322) are fixedly installed inside the movable tube (323). A spring (324) is fixedly installed at the top of the movable tube (323), and the top of the spring (324) is fixedly connected to the inner top wall of the buffer shell (321).

6. The CO cryogenic separation vent gas recovery unit of claim 5, wherein, A telescopic sealing ring (325) is provided on the outside of the spring (324), and the two ends of the telescopic sealing ring (325) are fixedly connected to the movable tube (323) and the inner top wall of the buffer shell (321), respectively.

7. The CO cryogenic separation vent gas recovery unit of claim 2, wherein, The maintenance assembly (330) includes support frames (331) disposed on both sides of the enrichment device (327). An installation frame (332) is slidably installed inside the two support frames (331). The enrichment device (327) is slidably installed on the top of the installation frame (332). A screw (333) is fixedly installed at the bottom of the installation frame (332). A drive tube (334) is rotatably installed between the two support frames (331). The drive tube (334) is sleeved on the outside of the screw (333) and threadedly connected to the screw (333). The top end of the enrichment device (327) is slidably connected to the other end of the delivery pipe (326).

8. The CO cryogenic separation vent gas recovery unit of claim 7, wherein, The top of the enrichment device (327) and the other end of the conveying pipe (326) are fixedly installed with sealing rings (335), the two sealing rings (335) abut against each other, the outer side of the enrichment device (327) is fixedly installed with an exhaust pipe (336), and the other end of the exhaust pipe (336) is slidably connected with the main gas pipe (100).

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