Separator for vehicle-mounted LNG (Liquefied Natural Gas) liquefaction cold box

Abstract

The utility model relates to the field of LNG (liquefied natural gas) production equipment, in particular to a separator for a vehicle-mounted LNG liquefaction cold box, which comprises a tank body, an exhaust valve and a drain valve are respectively arranged at the upper end and the lower end of the tank body, a feed pipe is arranged in the middle of the tank body, a mounting plate is arranged in the tank body at the upper end of the feed pipe, and a mounting cylinder penetrating through the mounting plate is arranged in the middle of the mounting plate. A spiral blade connected with the inner wall of the tank body is arranged on the outer side of the mounting cylinder below the mounting plate, a partition plate is arranged above the mounting plate, a mounting hole is formed in the partition plate, a conical wire mesh demister with an opening in the lower end is mounted in the mounting hole, and a conical extrusion disc is arranged below the conical wire mesh demister; and the tank body is provided with a lifting mechanism connected with the conical extrusion disc. The gas-liquid separator has the function of removing liquid in the conical wire mesh demister, the conical wire mesh demister keeps lower liquid content, and the gas-liquid separation effect is good.

Description

Technical Field

[0001] The utility model relates to the field of LNG production equipment, in particular to a separator for a vehicle-mounted LNG liquefaction cold box. Background Art

[0002] LNG, also known as liquefied natural gas, is mainly composed of methane. It is a recognized clean energy source and is colorless, odorless, non-toxic and non-corrosive. The extraction of liquefied petroleum gas is generally outdoors. In order to facilitate the movement of equipment, LNG production equipment is installed on vehicles. Vehicle-mounted LNG production equipment has the advantage of strong mobility.

[0003] The production process of liquefied petroleum gas is: processing natural gas, compressing natural gas, refrigeration, separation of components, decompression and liquefaction, and storage. The purpose of refrigeration is to liquefy natural gas. In this process, a liquefied cold box separator is required. The function of the separator is to effectively separate the condensed gas-liquid mixture. A wire mesh demister is generally used in the separator to separate gas and liquid. However, after a period of use, the wire mesh demister will cause the gas-liquid separation effect to deteriorate due to the high liquid content, affecting the gas-liquid separation effect. Therefore, it is particularly necessary to develop an on-board LNG liquefied cold box separator that can automatically remove liquid from the wire mesh demister. Summary of the invention

[0004] The utility model aims to provide a separator for a vehicle-mounted LNG liquefaction cold box, which has the advantages of being able to automatically remove liquid from a wire mesh demister and having a good gas-liquid separation effect.

[0005] The technical solutions adopted are as follows:

[0006] A separator for an on-vehicle LNG liquefaction cold box comprises a tank body, wherein an exhaust valve and a drain valve are respectively arranged at the upper and lower ends of the tank body, a feed pipe is arranged in the middle of the tank body, a mounting plate is arranged inside the tank body at the upper end of the feed pipe, a mounting cylinder penetrating the mounting plate is arranged in the middle of the mounting plate, a spiral blade connected to the inner wall of the tank body is arranged on the outer side of the mounting cylinder below the mounting plate, a partition is arranged above the mounting plate, a mounting hole is opened in the partition, a conical wire mesh demister with an opening at the lower end is installed in the mounting hole, a conical extrusion disk is arranged below the conical wire mesh demister, and the tank body is provided with a lifting mechanism connected to the conical extrusion disk.

[0007] Preferably, the mounting plate is tilted so that it is higher inside and lower outside, and a valve is provided on the tank body above the mounting plate.

[0008] Preferably, the lifting mechanism comprises a plurality of vertically extending electric telescopic rods, and the lower ends of the electric telescopic rods are connected to the conical extrusion disk.

[0009] Preferably, a one-way valve is provided on the feed pipe.

[0010] Preferably, a rotating shaft is rotatably arranged in the installation cylinder, and a plurality of fan plates are arranged on the side of the rotating shaft.

[0011] Compared with the prior art, the beneficial effects are:

[0012] After the gas-liquid mixture enters from the feed pipe, it descends along the spiral channel outside the installation cylinder, and the gas drips to the bottom end of the tank body. The gas enters the installation cylinder and moves upward to pass through the conical wire mesh demister for gas-liquid separation again. When the conical wire mesh demister absorbs more liquid, the conical extrusion disk is controlled to rise and extrude the conical wire mesh demister, so as to squeeze out the liquid contained in the conical wire mesh demister, keep the liquid content of the conical wire mesh demister low, and have a good gas-liquid separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a separator for a vehicle-mounted LNG liquefaction cold box.

[0014] Figure 2 This is a schematic diagram of the working state structure of a conical extrusion disk of a separator for a vehicle-mounted LNG liquefaction cold box of the utility model.

[0015] In the figure: 1. tank body, 2. exhaust valve, 3. drain valve, 4. feed pipe, 5. check valve, 6. mounting plate, 7. mounting cylinder, 8. valve, 9. spiral blade, 10. partition, 11. conical wire mesh demister, 12. conical extrusion disk, 13. lifting mechanism, 14. rotating shaft, 15. fan plate. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with specific embodiments. Figure 1 and Figure 2 As shown:

[0017] Embodiment 1: A separator for a vehicle-mounted LNG liquefaction cold box, comprising a tank body 1, an exhaust valve 2 and a drain valve 3 are respectively provided at the upper and lower ends of the tank body 1, a feed pipe 4 is provided in the middle of the tank body 1, the feed pipe 4 is used to input a gas-liquid mixture into the tank body 1, a mounting plate 6 is provided inside the tank body 1 at the upper end of the feed pipe 4, and a mounting cylinder 7 penetrating the mounting plate 6 is provided in the middle of the mounting plate 6,

[0018] The outer side of the installation cylinder 7 below the installation plate 6 is provided with a spiral blade 9 connected to the inner wall of the tank body 1. The gas-liquid mixture entering from the feed pipe 4 enters the space formed by the spiral blade 9 and the inner wall of the tank body 1, and the gas-liquid mixture descends along the spiral channel outside the installation cylinder 7. The gas drips to the bottom end of the tank body 1, and the gas enters the installation cylinder 7 and moves upward.

[0019] A partition 10 is arranged above the mounting plate 6, and the partition 10 is provided with a mounting hole. A conical wire mesh demister 11 with an opening at the lower end is installed in the mounting hole, a conical extrusion disk 12 is arranged below the conical wire mesh demister 11, and the tank body 1 is provided with a lifting mechanism 13 connected with the conical extrusion disk 12. The gas moves upward from the mounting cylinder 7 and passes through the conical wire mesh demister 11 for gas-liquid separation again. When the conical wire mesh demister 11 absorbs more liquid, the conical extrusion disk 12 is controlled to rise and extrude the conical wire mesh demister 11, so as to squeeze out the liquid contained in the conical wire mesh demister 11 and keep the liquid content of the conical wire mesh demister 11 low.

[0020] Embodiment 2: A separator for a vehicle-mounted LNG liquefaction cold box, comprising a tank body 1, an exhaust valve 2 and a drain valve 3 are respectively provided at the upper and lower ends of the tank body 1, a feed pipe 4 is provided in the middle of the tank body 1, the feed pipe 4 is used to input a gas-liquid mixture into the tank body 1, a one-way valve 5 is provided on the feed pipe 4, a mounting plate 6 is provided inside the tank body 1 at the upper end of the feed pipe 4, a mounting cylinder 7 penetrating the mounting plate 6 is provided in the middle of the mounting plate 6, the mounting plate 6 is inclinedly arranged with the inner side higher and the outer side lower, and a valve 8 is provided on the tank body 1 above the mounting plate 6,

[0021] The outer side of the installation cylinder 7 below the installation plate 6 is provided with a spiral blade 9 connected to the inner wall of the tank body 1. The gas-liquid mixture entering from the feed pipe 4 enters the space formed by the spiral blade 9 and the inner wall of the tank body 1, and the gas-liquid mixture descends along the spiral channel outside the installation cylinder 7. The gas drips to the bottom end of the tank body 1, and the gas enters the installation cylinder 7 and moves upward.

[0022] A partition 10 is arranged above the mounting plate 6, and a mounting hole is opened on the partition 10. A conical wire mesh demister 11 with an opening at the lower end is installed in the mounting hole. A conical extrusion disk 12 is arranged below the conical wire mesh demister 11. The tank body 1 is provided with a lifting mechanism 13 connected to the conical extrusion disk 12. The gas moves upward from the mounting cylinder 7 and passes through the conical wire mesh demister 11 for gas-liquid separation again. The lifting mechanism 13 includes a plurality of vertically extending electric telescopic rods, and the lower ends of the electric telescopic rods are all connected to the conical extrusion disk 12.

[0023] A rotating shaft 14 is rotatably arranged in the installation cylinder 7, and a plurality of fan plates 15 are arranged on the side of the rotating shaft 14. The gas entering the installation cylinder 7 moves upward to blow the fan plates 15 to rotate, and the water adhering to the fan plates 15 is thrown off.

[0024] The specific working process is as follows: after the gas-liquid mixture enters from the feed pipe 4, it descends along the spiral channel outside the mounting cylinder 7, the gas drips to the bottom end of the tank body 1, the gas enters the mounting cylinder 7 and moves upward, the gas entering the mounting cylinder 7 moves upward to blow the fan plate 15 to rotate, and the gas continues to move upward through the conical wire mesh demister 11 for gas-liquid separation again. When the conical wire mesh demister 11 adsorbs more liquid, the conical extrusion disk 12 is controlled to rise and extrude the conical wire mesh demister 11, and the liquid contained in the conical wire mesh demister 11 is squeezed out to keep the liquid content of the conical wire mesh demister 11 low. When the gas-liquid mixture is stopped from being input into the tank body 1, the valve 8 and the drain valve 3 are opened to discharge the liquid.

[0025] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A separator for a vehicle-mounted LNG liquefaction cold box, characterized in that: It includes a tank body, which is respectively provided with an exhaust valve and a drain valve at the upper and lower ends of the tank body, a feed pipe is provided in the middle of the tank body, a mounting plate is provided inside the tank body at the upper end of the feed pipe, a mounting cylinder penetrating the mounting plate is provided in the middle of the mounting plate, a spiral blade connected to the inner wall of the tank body is provided on the outer side of the mounting cylinder below the mounting plate, a partition is provided above the mounting plate, the partition is provided with a mounting hole, a conical wire mesh demister with an opening at the lower end is installed in the mounting hole, a conical extrusion disk is provided below the conical wire mesh demister, and the tank body is provided with a lifting mechanism connected to the conical extrusion disk.

2. A separator for a vehicle-mounted LNG liquefaction cold box according to claim 1, characterized in that: The installation plate is arranged to be inclined with the inside being higher and the outside being lower, and a valve is arranged on the tank body above the installation plate.

3. The separator for a vehicle-mounted LNG liquefaction cold box according to claim 1, characterized in that: The lifting mechanism comprises a plurality of vertically extending electric telescopic rods, and the lower ends of the electric telescopic rods are all connected to the conical extrusion disk.

4. The separator for a vehicle-mounted LNG liquefaction cold box according to claim 1, characterized in that: The feed pipe is provided with a one-way valve.

5. The separator for a vehicle-mounted LNG liquefaction cold box according to claim 1, characterized in that: A rotating shaft is rotatably arranged in the installation cylinder, and a plurality of fan plates are arranged on the side of the rotating shaft.

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