A cryogenic separation and choke manifold integrated device

Abstract

The application provides a low-temperature separation and throttling manifold integrated device, and relates to the technical field of natural gas treatment equipment. The device comprises a low-temperature separation tank, a throttling manifold module and a ring body gas cooling assembly. One end of the throttling manifold module is connected with a gas flow supply device, and the other end extends to the inside of the low-temperature separation tank and leads the flow upward. The ring body gas cooling assembly is arranged in the inside of the low-temperature separation tank and located above the end of the throttling manifold module, and the two ends of the ring body gas cooling assembly pass through the tank wall and are connected with a low-temperature cold gas circulation supply device. A rotatable rotating disturbance unit is arranged in the space surrounded by the ring body gas cooling assembly, and the top of the rotating disturbance unit is in contact with the lower surface of a wire mesh mist eliminator. Through the cooperation of the ring body gas cooling assembly and the rotating disturbance unit, the heat exchange efficiency of the low-temperature cold gas and the natural gas flow is strengthened, the ice particles and liquid phase adhered to the lower surface of the wire mesh mist eliminator can be scraped in real time, the separation channel blockage problem is effectively solved, and the gas-liquid-solid separation effect and the equipment operation continuity are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of natural gas processing equipment technology, and in particular to an integrated device for cryogenic separation and throttling manifolds. Background Technology

[0002] The integrated low-temperature separation and throttling manifold device is mainly used in high-pressure natural gas gathering and transmission stations, coalbed methane extraction sites, and offshore oil and gas platforms. It is used to throttle and expand the extracted high-pressure natural gas to reduce its temperature, causing water vapor and heavy hydrocarbon components in the gas flow to condense into liquid or solid hydrates. Then, the gas, liquid, and solid phases are separated by a separation tank to obtain dry natural gas that meets pipeline transportation standards.

[0003] Currently, existing integrated devices typically include a throttling manifold, a cyclone separator, and a built-in baffle or wire mesh precipitator. The basic working process is as follows: high-pressure natural gas expands and cools through the throttling nozzle of the throttling manifold, then enters the separator as a high-speed jet. As the gas flows upward within the separator, some water vapor condenses into droplets or ice particles due to the low temperature and settles under gravity. The remaining fine liquid-solid phase is intercepted by the top wire mesh precipitator.

[0004] However, such existing structures have the following technical drawbacks: Firstly, the heat exchange separation efficiency is limited by the airflow pattern. In existing devices, the airflow after throttling and expansion usually enters the separation space in a direct or disordered diffusion manner. The heat exchange time between the airflow and the low-temperature environment inside the tank is short and the contact area is limited, resulting in insufficient condensation. A large amount of fine liquid-solid phase still escapes to the downstream pipeline with the airflow, which seriously affects the separation accuracy and product quality.

[0005] Secondly, the mist eliminator layer is prone to clogging and lacks an online self-cleaning mechanism. During the interception of fine liquid-solid phases, ice particles and hydrates gradually condense and accumulate on the lower surface of the wire mesh and within the mesh gaps, forming a dense ice blockage layer. Existing devices rely on periodic shutdowns for manual cleaning or backflushing to restore throughput, which is not only cumbersome and costly but also leads to production interruptions. In particular, the ice particles adhering to the lower surface of the wire mesh cannot be washed away by the airflow, resulting in a sharp increase in pressure drop after long-term operation, seriously threatening system safety and operational continuity. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated device for cryogenic separation and throttling manifolds to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An integrated cryogenic separation and throttling manifold device includes a cryogenic separation tank, a throttling manifold module, a wire mesh mist eliminator, and an annular air-cooling assembly. One end of the throttling manifold module is connected to an airflow supply device, and the other end extends into the cryogenic separation tank, guiding the airflow upwards. The cryogenic separation tank has a gas phase outlet at the top and a liquid phase outlet at the bottom. The annular air-cooling assembly is located inside the cryogenic separation tank, above the end of the throttling manifold module. The airflow from the throttling manifold module flows upwards within the space enclosed by the annular air-cooling assembly. Both ends pass through the outer wall of the cryogenic separation tank and are connected to the cryogenic cold air circulation supply device; the space enclosed by the annular air-cooling assembly has a rotatable rotating disturbance unit. When the cryogenic cold air flows in the inner cavity of the annular air-cooling assembly, the rotating disturbance unit performs a rotation action to disturb the passing airflow; the wire mesh mist eliminator is set above the rotating disturbance unit, and its edge is fixedly connected to the inner wall of the cryogenic separation tank. The top of the rotating disturbance unit contacts the lower surface of the wire mesh mist eliminator, and it can scrape off ice particles and liquid phase on the lower surface of the wire mesh mist eliminator during rotation.

[0008] Based on the above technical solutions, the present invention also provides the following optional technical solutions: In one alternative: the throttling manifold module includes an internal drainage pipe, a manifold pipe, and at least two throttling branches. Each throttling branch is equipped with a shut-off valve and an adjustable throttling valve connected in series. The outlet of each throttling branch flows into the manifold pipe. One end of the internal drainage pipe is connected to the manifold pipe, and the other end extends into the interior of the cryogenic separator.

[0009] In one alternative: a flow meter is installed at the connection between each of the throttling branches and the manifold to adjust the flow rate of each throttling branch into the manifold; an alcohol injection module is installed at the internal drainage pipe; the alcohol injection module includes an alcohol injection inlet interface and a check valve; the alcohol injection inlet interface is connected to a methanol or ethylene glycol storage tank through a pipeline; and the check valve is used to prevent backflow of gas into the alcohol injection module.

[0010] In one alternative embodiment: the annular air-cooling assembly includes an annular heat exchange shell and an outer fixed shell. The outer fixed shell is fixed to the inner wall of the cryogenic separation tank, and an inlet pipe and an outlet pipe are provided on its outer wall. The ends of the inlet pipe and the outlet pipe away from the outer fixed shell pass through the side wall of the cryogenic separation tank and are connected to the cryogenic cold air circulation supply device. The annular heat exchange shell is rotatably disposed on the inner surface of the outer fixed shell, forming a flow cavity between it and the outer fixed shell. The outer wall of the annular heat exchange shell is provided with a plurality of receiving arc-shaped plates for receiving the cryogenic cold air flow.

[0011] In one alternative: multiple receiving arc-shaped plates are distributed circumferentially, and the air intake pipe is tangentially arranged along the outer wall of the outer fixed shell.

[0012] In one alternative embodiment: the rotating disturbance unit includes a turbulence main shaft and turbulence plates. The turbulence main shaft is located at the center line of the annular heat exchange shell and is fixedly connected to the inside of the annular heat exchange shell by at least one radial fixing rod. The turbulence plates are arranged on the side wall of the turbulence main shaft and distributed circumferentially. At least one upper scraper is provided at the top of the turbulence main shaft, and the upper scraper contacts the lower surface of the wire mesh mist eliminator.

[0013] In one alternative: the gas phase outlet is a pipe with its lower end extending into the interior of the cryogenic separator, and the lower end of the gas phase outlet has a conical guide plate with liquid phase adhesion protrusions distributed on the inner surface of the conical guide plate.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects: This invention utilizes a rotating disturbance unit within the space enclosed by the annular gas-cooling assembly. As the low-temperature gas circulates within the annular cavity, the rotating disturbance unit synchronously rotates, actively altering the flow direction of the natural gas flow, transforming it from a disordered upward flow to a spiral upward flow. This spiral flow pattern effectively prolongs the gas flow path and residence time within the low-temperature region, while simultaneously forcing the gas flow to create a forced convection impact with the inner surface of the annular gas-cooling assembly. This significantly increases the heat exchange area and heat transfer coefficient between gas and solid / liquid and solid phases, ensuring sufficient condensation of water vapor and significantly reducing the dew point temperature at the gas phase outlet.

[0015] The top of the rotating disturbance unit in this invention remains in contact with the lower surface of the wire mesh mist eliminator, generating a continuous mechanical scraping action during rotation. This effectively removes ice particles, hydrates, and condensate adhering to the lower surface of the wire mesh. The scraped-off solid and liquid phases fall directly to the liquid phase outlet at the bottom of the tank due to their own gravity, thus effectively preventing the accumulation of ice blockage. This structure requires no additional external drive or control system, utilizing the self-energy of the low-temperature cold air flow to drive the rotation. It achieves integrated linkage of "condensation enhancement - capture and interception - self-cleaning scraping," greatly extending the non-stop operating cycle of the device and reducing maintenance frequency and operating costs.

[0016] This invention integrates multiple functions such as throttling manifold, low-temperature separation, enhanced heat exchange, and self-cleaning mist collection into the same tank, eliminating the need for external circulation pipelines or large rotating equipment. Its ingenious structural design and small footprint make it particularly suitable for space-constrained and difficult-to-maintain operating scenarios such as offshore platforms and desert gas gathering stations, demonstrating high industrial practical value and promising prospects for widespread application. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the integrated low-temperature separation and throttling manifold device in one embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional structural diagram of an integrated low-temperature separation and throttling manifold device according to one embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the throttling manifold module structure in one embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the annular air-cooling assembly and rotating disturbance unit structure in one embodiment of the present invention.

[0022] Figure 5 This is a cross-sectional view of the annular air-cooling assembly in one embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the gas phase outlet structure in one embodiment of the present invention.

[0024] Figure reference numerals: Cryogenic separator 100, liquid phase outlet 110, gas phase outlet 120, conical guide plate 130, throttling manifold module 200, throttling branch 210, internal drainage pipe 220, manifold 230, alcohol injection module 240, flow meter 250, annular air cooling assembly 300, annular heat exchange shell 310, outer fixed shell 320, air inlet pipe 330, air outlet pipe 340, receiving arc plate 350, rotating disturbance unit 400, turbulence main shaft 410, turbulence vane 420, upper scraper 430, radial fixing rod 440, wire mesh mist eliminator 500. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The left, right, up, and down positions of the various components shown in the attached diagram are just one arrangement method; the specific positions should be set according to specific needs.

[0027] In one embodiment, such as Figure 1 and Figure 2 As shown, an integrated cryogenic separation and throttling manifold device includes a cryogenic separation tank 100, a throttling manifold module 200, an annular air-cooling assembly 300, and a wire mesh mist eliminator 500. One end of the throttling manifold module 200 is connected to an airflow supply device, and the other end extends into the cryogenic separation tank 100, guiding the airflow upwards. The cryogenic separation tank 100 has a gas phase outlet 120 at the top and a liquid phase outlet 110 at the bottom. The annular air-cooling assembly 300 is located inside the cryogenic separation tank 100, above the end of the throttling manifold module 200. The airflow from the throttling manifold module 200 flows upwards within the space enclosed by the annular air-cooling assembly 300. The annular air-cooling assembly 300 has two ends that pass through the outer wall of the cryogenic separation tank 100 and are connected to the cryogenic cold air circulation supply device. The space enclosed by the annular air-cooling assembly 300 has a rotatable rotating disturbance unit 400. When the cryogenic cold air flows in the inner cavity of the annular air-cooling assembly 300, the rotating disturbance unit 400 performs a rotation action to disturb the passing airflow. The wire mesh mist eliminator 500 is disposed above the rotating disturbance unit 400, and its edge is fixedly connected to the inner wall of the cryogenic separation tank 100. The top of the rotating disturbance unit 400 is in contact with the lower surface of the wire mesh mist eliminator 500. During the rotation process, it can scrape off ice particles and liquid phase from the lower surface of the wire mesh mist eliminator 500.

[0028] In this embodiment of the invention, the gas supply device introduces natural gas gas into the cryogenic separator 100 through the throttling manifold module 200. The natural gas gas flows upward in a spiral manner, passing sequentially through the space enclosed by the annular gas cooling assembly 300 and the wire mesh mist eliminator 500, and finally exits from the gas phase outlet 120. After the gas gas exits through the end of the throttling manifold module 200, the gas pressure is released and dispersed in all directions. When the natural gas gas flows upward through the space enclosed by the annular gas cooling assembly 300, heat exchange occurs between the cryogenic cold air flowing inside the annular gas cooling assembly 300 and the natural gas gas gas. The water vapor in the natural gas gas gas condenses, forming a liquid phase and a solid phase. The heavier liquid and solid phases fall directly. The smaller liquid and solid phases flow upwards with the gas flow and remain on the lower surface of the wire mesh precipitator 500. As the cryogenic gas circulates within the annular gas-cooling assembly 300, the rotating disturbance unit 400 rotates, agitating the natural gas flow and directing it upwards in a spiral motion towards the gas phase outlet 120. This ensures the natural gas flow makes full contact with the inner surface of the annular gas-cooling assembly 300, effectively improving heat exchange efficiency. The top of the rotating disturbance unit 400 acts on the lower surface of the wire mesh precipitator 500, effectively scraping away the liquid and solid phases adhering to it, thus effectively separating hydrates and solids from the natural gas flow. The cryogenic separation tank 100 has a cold-insulating layer on its outer surface to reduce cold loss and prevent external icing.

[0029] In one embodiment, such as Figures 1-3 As shown, the throttling manifold module 200 includes an internal drainage pipe 220, a manifold pipe 230, and at least two throttling branches 210. Each throttling branch 210 is equipped with a shut-off valve and an adjustable throttling valve in series. The outlet of each throttling branch 210 flows into the manifold pipe 230. One end of the internal drainage pipe 220 is connected to the manifold pipe 230, and the other end extends into the cryogenic separator 100. In this embodiment of the invention, multiple throttling branches 210 are used for full load, half load, and low load conditions, respectively. The adjustable throttling valve is a cage-type throttling valve, and the valve core is made of tungsten carbide hard alloy weld overlay to resist the erosion and wear of sand-containing gas flow.

[0030] In one embodiment, such as Figures 1-3 As shown, a flow meter 250 is installed at the connection between each throttling branch 210 and the manifold 230 to adjust the flow rate of each throttling branch 210 into the manifold 230. An alcohol injection module 240 is installed at the internal drainage pipe 220. The alcohol injection module 240 includes an alcohol injection inlet interface and a check valve. The alcohol injection inlet interface is connected to a methanol or ethylene glycol storage tank through a pipe. The check valve is used to prevent backflow of gas into the alcohol injection module 240. In this embodiment of the invention, the flow meter 250 can be set to adjust the flow rate into the manifold 230 in real time according to the actual working conditions. Ethylene glycol or methanol is introduced into the internal drainage pipe 220 through the alcohol injection module 240, which can effectively inhibit the formation of hydrates and prevent blockage.

[0031] In one embodiment, such as Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the annular air-cooling assembly 300 includes an annular heat exchange shell 310 and an outer fixed shell 320. The outer fixed shell 320 is fixed to the inner wall of the cryogenic separation tank 100. An inlet pipe 330 and an outlet pipe 340 are provided on its outer wall. The ends of the inlet pipe 330 and the outlet pipe 340 away from the outer fixed shell 320 pass through the side wall of the cryogenic separation tank 100 and are connected to a cryogenic cold air circulation supply device. The annular heat exchange shell 310 is rotatably disposed on the inner surface of the outer fixed shell 320, forming a flow cavity between it and the outer fixed shell 320. The outer wall of the annular heat exchange shell 310 is provided with multiple supports for receiving... A low-temperature cold airflow receiving arc plate 350; In this embodiment of the invention, the air inlet pipe 330 and the air outlet pipe 340 are connected to the flow cavity. The low-temperature cold air circulation supply device introduces low-temperature airflow into the flow cavity through the air inlet pipe 330. The low-temperature airflow acts on the receiving arc plate 350, and the receiving arc plate 350 withstands the impact of the low-temperature airflow to drive the annular heat exchange shell 310 to rotate. In turn, the rotation disturbance unit 400 rotates with the annular heat exchange shell 310 to disturb the natural gas airflow. The low-temperature airflow exchanges heat with the natural gas airflow through the annular heat exchange shell 310 to cool the natural gas airflow and realize the formation of hydrates.

[0032] The multiple receiving arc-shaped plates 350 are arranged circumferentially, and the air inlet pipe 330 is arranged tangentially along the outer wall of the outer fixed shell 320, so that the low-temperature airflow enters the flow cavity and directly acts on the receiving arc-shaped plates 350.

[0033] In one embodiment, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the rotating disturbance unit 400 includes a turbulence main shaft 410 and turbulence plates 420. The turbulence main shaft 410 is located at the center line of the annular heat exchange shell 310 and is fixedly connected to the inside of the annular heat exchange shell 310 by at least one radial fixing rod 440. The turbulence plates 420 are arranged on the side wall of the turbulence main shaft 410 and distributed circumferentially. At least one upper scraper 430 is provided on the top of the turbulence main shaft 410, and the upper scraper 430 contacts the lower surface of the wire mesh mist eliminator 500. In this embodiment of the invention, the turbulence main shaft 410 rotates with the annular heat exchange shell 310, and the turbulence main shaft 410 drives the turbulence plates 420 to rotate to disturb the natural gas flow through the space enclosed by the annular heat exchange shell 310, so that the natural gas flow can fully contact the inner surface of the annular heat exchange shell 310 and improve the heat exchange efficiency. At the same time, the radial fixing rod 440 rotates with the turbulence main shaft 410 to scrape off the solid and liquid phases on the lower surface of the wire mesh mist eliminator 500.

[0034] In one embodiment, such as Figure 1 , Figure 2 and Figure 6As shown, the gas phase outlet 120 is a pipe with its lower end extending into the interior of the cryogenic separator 100. The lower end of the gas phase outlet 120 has a conical guide plate 130, and the inner surface of the conical guide plate 130 is distributed with liquid phase adhesion protrusions. The conical guide plate 130 can guide the natural gas flow after passing through the wire mesh mist eliminator 500 into the interior of the gas phase outlet 120. The liquid phase adhesion protrusions can adsorb the liquid and solid particles remaining in the natural gas flow.

[0035] The above embodiments provide an integrated device for cryogenic separation and throttling manifold, the working principle of which is as follows: 1. Airflow supply and throttling control stage The natural gas flow first enters the throttling manifold module 200. Depending on the site conditions (full load, half load, or low load), the system selectively opens the corresponding throttling branch 210. Each branch is equipped with a shut-off valve and an adjustable throttling valve (cage-type throttling valve with a tungsten carbide hard alloy weld overlay on the valve core). When the gas flows through the throttling valve, the pressure drops sharply, and the temperature drops significantly (Joule-Thomson effect).

[0036] The airflow from each throttling branch 210 merges into the manifold 230. During this process, a flow meter 250 installed at the connection point monitors the flow data in real time to dynamically adjust the opening of each branch and ensure stable airflow parameters after merging. Subsequently, the airflow enters the internal drainage pipe 220. To prevent residual water vapor in the low-temperature airflow after throttling from forming hydrates and clogging the pipe, the alcohol injection module 240 installed at the internal drainage pipe 220 is actively activated to inject hydrate inhibitors from the methanol or ethylene glycol storage tank into the pipe through the alcohol injection inlet interface. The check valve effectively prevents backflow of high-pressure airflow, thereby ensuring the unobstructed flow of the internal drainage pipe 220.

[0037] 2. Airflow guidance and initial phase change after throttling After throttling and alcohol injection, the cryogenic natural gas flow extends through the internal guide pipe 220 to the end of the cryogenic separator 100 and is discharged. At the moment of gas discharge, the space suddenly expands, the pressure is further released, and the gas flow spreads in all directions.

[0038] At this point, the airflow rises and enters the internal space enclosed by the annular air-cooling assembly 300. Because the outer surface of the cryogenic separator 100 is equipped with a cold-insulating layer, the transfer of heat from the external environment to the interior is greatly reduced, maintaining a stable low-temperature field inside the tank. As the natural gas flow passes through the space enclosed by the annular air-cooling assembly 300, a violent heat exchange occurs between the natural gas flow and the cryogenic cold air flowing within the assembly's cavity, further lowering the airflow temperature below the hydrate formation temperature. The water vapor in the airflow becomes supersaturated and condenses, forming a liquid water phase and a solid hydrate grain phase. The heavier liquid and solid phases fall directly to the bottom of the tank under gravity and are discharged through the liquid phase outlet 110; the smaller droplets and solid particles continue to move upwards with the airflow.

[0039] 3. Driven by forced spiral heat exchange and cooling circulation To enhance heat exchange and extend the residence time of the airflow in the low-temperature zone, the device employs a linkage design between the annular air-cooling assembly 300 and the rotating disturbance unit 400. The annular air-cooling assembly 300 consists of an outer fixed shell 320 fixed to the inner wall of the low-temperature separation tank 100 and a rotatable annular heat exchange shell 310, forming a flow cavity between the two. The cold air supplied by the external low-temperature cold air circulation supply device enters the flow cavity at high speed through the tangentially arranged air inlet pipe 330.

[0040] Since the intake pipe 330 is tangentially arranged along the outer wall of the outer fixed shell 320, the low-temperature cold airflow directly impacts the multiple receiving arc-shaped plates 350 distributed circumferentially on the outer wall of the annular heat exchange shell 310 after entering. This impact force drives the annular heat exchange shell 310 to rotate continuously on the inner surface of the outer fixed shell 320. After heat exchange, the cold air flows back from the outlet pipe 340 to the low-temperature cold air circulation supply device, realizing the circulation of cold energy.

[0041] 4. Dynamic perturbation and efficient capture The rotation of the annular heat exchange shell 310 drives the rotating disturbance unit 400 located at the center line to rotate synchronously via the radial fixed rod 440.

[0042] Enhanced heat transfer: The circumferentially distributed turbulence vanes 420 on the sidewall of the turbulence main shaft 410 rotate accordingly, forcibly agitating the rising airflow within the space enclosed by the annular heat exchange shell 310. This rotational disturbance alters the straight upward path of the airflow, transforming it into a spiral upward flow. This not only increases the residence time of the airflow in the low-temperature region but also forces the natural gas flow to have more thorough contact and collision with the inner surface of the annular heat exchange shell 310, greatly improving heat transfer efficiency and promoting the condensation and precipitation of more fine hydrate particles.

[0043] High-efficiency capture: The gas flow carrying remaining tiny droplets and solid particles continues to rise, reaching the wire mesh precipitator 500 positioned above the rotating disturbance unit 400. As the gas flow passes through the wire mesh, the tiny droplets and solid particles are captured by inertial collision and interception, remaining on the lower surface of the wire mesh precipitator 500, thus achieving fine separation of gas, liquid, and solid. The purified natural gas flow is then discharged through the gas phase outlet 120.

[0044] 5. Rotary self-cleaning and final output During the continuous rotation of the rotating disturbance unit 400, the upper scraper 430 located at the top of the turbulence main shaft 410 remains in contact with and rotates on the lower surface of the wire mesh mist eliminator 500. This mechanical scraping action can promptly remove ice particles, hydrate solid phases, and liquid phase mixtures adhering to the lower surface of the wire mesh, effectively preventing the wire mesh from experiencing increased pressure differential or blockage failure due to ice blockage or hydrate accumulation, thus ensuring long-term operational stability.

[0045] The scraped-off liquid and solid phases fall to the bottom of the cryogenic separator 100, where they merge with the liquid that settled by gravity and are discharged through the liquid phase outlet 110. Finally, the finely separated dry natural gas stream rises to the lower end of the gas phase outlet 120 and enters the pipe body under the guidance of the conical guide plate 130. The liquid phase adhesion protrusions distributed on the inner surface of the conical guide plate 130 perform a final interception and fine treatment on the gas stream, adsorbing residual trace amounts of liquid and solid particles to ensure that the finally discharged natural gas meets the outlet gas quality requirements, thus completing the integrated process of throttling, cooling, separation, and self-cleaning.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. An integrated device for cryogenic separation and throttling manifold, comprising a cryogenic separation tank, a throttling manifold module, a wire mesh mist eliminator, and an annular air-cooling assembly, characterized in that, One end of the throttling manifold module is connected to the air supply device, and the other end extends into the interior of the cryogenic separator and guides the air upward. The cryogenic separator is provided with a gas phase outlet at the top and a liquid phase outlet at the bottom. The annular air-cooling assembly is located inside the cryogenic separator and above the end of the throttling manifold module. The airflow from the throttling manifold module flows upward through the space enclosed by the annular air-cooling assembly. Both ends of the annular air-cooling assembly pass through the outer wall of the cryogenic separator and are connected to the cryogenic cold air circulation supply device. The space enclosed by the annular air-cooling assembly has a rotatable rotating disturbance unit. When the low-temperature cold air flows in the inner cavity of the annular air-cooling assembly, the rotating disturbance unit performs a rotational action to disturb the passing airflow. The wire mesh mist eliminator is positioned above the rotating disturbance unit, with its edge fixedly connected to the inner wall of the cryogenic separation tank. The top of the rotating disturbance unit is in contact with the lower surface of the wire mesh mist eliminator, and during rotation, it can scrape off ice particles and liquid phase from the lower surface of the wire mesh mist eliminator.

2. The integrated low-temperature separation and throttling manifold device according to claim 1, characterized in that, The throttling manifold module includes an internal drainage pipe, a manifold pipe, and at least two throttling branches; Each throttling branch is equipped with a shut-off valve and an adjustable throttling valve connected in series. The outlets of each throttling branch are connected to the manifold. One end of the internal drainage pipe is connected to the manifold, and the other end extends into the interior of the cryogenic separator.

3. The integrated low-temperature separation and throttling manifold device according to claim 2, characterized in that, Each of the aforementioned throttling branches and the manifold is equipped with a flow meter to adjust the flow rate of each throttling branch into the manifold. An alcohol injection module is installed at the internal drainage pipeline. The alcohol injection module includes an alcohol injection inlet interface and a check valve. The alcohol injection inlet interface is connected to a methanol or ethylene glycol storage tank through a pipeline. The check valve is used to prevent gas flow from flowing back into the alcohol injection module.

4. The integrated cryogenic separation and throttling manifold device according to claim 1, characterized in that, The annular air-cooling assembly includes an annular heat exchange shell and an outer fixed shell; The outer fixed shell is fixed to the inner wall of the cryogenic separation tank. An air inlet pipe and an air outlet pipe are provided on its outer wall. The ends of the air inlet pipe and the air outlet pipe away from the outer fixed shell pass through the side wall of the cryogenic separation tank and are connected to the cryogenic cold air circulation supply device. The annular heat exchange shell is rotatably disposed on the inner surface of the outer fixed shell, forming a flow cavity between it and the outer fixed shell. The outer wall of the annular heat exchange shell is provided with multiple receiving arc-shaped plates for receiving the cryogenic cold air flow.

5. The integrated cryogenic separation and throttling manifold device according to claim 4, characterized in that, Multiple receiving arc-shaped plates are distributed circumferentially, and the air intake pipe is tangentially arranged along the outer wall of the outer fixed shell.

6. The integrated cryogenic separation and throttling manifold device according to claim 4, characterized in that, The rotating disturbance unit includes a turbulence main shaft and turbulence vanes; The turbulence-inducing main shaft is located at the center line of the annular heat exchange shell and is fixedly connected to the inside of the annular heat exchange shell by at least one radial fixing rod. The turbulence-inducing plates are arranged on the side wall of the turbulence-inducing main shaft and distributed circumferentially. The top of the turbulence main shaft is provided with at least one upper scraper, which is in contact with the lower surface of the wire mesh fog eliminator.

7. The integrated cryogenic separation and throttling manifold device according to claim 1, characterized in that, The gas phase outlet is a pipe with its lower end extending into the interior of the cryogenic separation tank. The lower end of the gas phase outlet has a conical guide plate with liquid phase adhesion protrusions distributed on the inner surface of the conical guide plate.

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