Liquefied gas purification device
By using a vaporizer and molecular sieve adsorption column in the liquefied gas purification unit to remove water and carbon dioxide impurities from liquefied natural gas, the problems of equipment blockage and corrosion are solved, achieving efficient impurity removal and equipment simplification.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-03-20
AI Technical Summary
After liquefied natural gas is produced, it contains impurities such as water and carbon dioxide. If these are not removed, they can cause equipment blockage and corrosion, reducing the equipment's lifespan.
A liquefied gas purification device was designed, including a vaporizer, a molecular sieve adsorption column, and a low-temperature cooling device. The liquefied gas is converted into a gaseous state by an electrically heated water bath vaporizer, impurities are removed by the molecular sieve adsorption column, and the gas is cooled by a low-temperature circulating refrigeration machine to achieve complete removal of impurities.
While ensuring the removal of impurities, the device has a small footprint, is easy to transport and install, simplifies the process, and extends the service life of the equipment.
Smart Images
Figure CN224018174U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the liquefied gas field especially relates to a liquefied gas purification device. BACKGROUND
[0002] The main component of liquefied natural gas (Liquefied Natural Gas) is methane, is praised as the cleanest fossil energy on the earth. It is colorless, odorless, non-toxic and will not corrode, and its volume is about 1 / 625 of the same amount of gaseous natural gas volume, and its mass is only about 45% of the same volume of water.
[0003] Liquefied natural gas will contain water and carbon dioxide and other impurities inside after production, if not removed, water will freeze and block the pipeline (hydrate is formed under low temperature), CO2 can form dry ice under low temperature, corrode equipment and reduce the calorific value.
[0004] Therefore, it is necessary to provide a new liquefied gas purification device to solve the above technical problems. UTILITY MODEL CONTENT
[0005] To solve the above technical problems, the utility model provides a liquefied gas purification device, which solves the problem that liquefied natural gas will contain water and carbon dioxide and other impurities inside after production, if not removed, will greatly reduce the service life of the equipment.
[0006] The liquefied gas purification device provided by the utility model comprises a base, first steel cylinders and second steel cylinders are symmetrically arranged above the base, a vaporizer, a purification unit and a low-temperature cooling device are sequentially arranged between the first steel cylinders and the second steel cylinders.
[0007] In a preferred embodiment, the first steel cylinder is a source steel cylinder for storing liquefied gas to be purified, and the second steel cylinder is a target steel cylinder for receiving purified gas.
[0008] In a preferred embodiment, arc-shaped plates are arranged on one side of the first steel cylinder and the second steel cylinder, and the arc-shaped plates are fixed on the base at the bottom;
[0009] A rotating shaft is movably arranged on one side of the arc-shaped plate, a closing plate is fixed on one side of the rotating shaft, connecting seats are fixed on the arc-shaped plate and the closing plate, through holes are formed in the connecting seats, and the connecting seats are connected by bolts.
[0010] In a preferred embodiment, the vaporizer is an electric heating water bath type vaporizer.
[0011] In a preferred embodiment, the purification unit is specifically an adsorption column filled with molecular sieve.
[0012] In a preferred embodiment, the low-temperature cooling device employs a low-temperature circulation refrigerator.
[0013] The purification device has the advantages that: compared with the prior purification device, the purification device can ensure that the water and carbon dioxide in the natural gas are fully removed, has a small floor area, is convenient to transport and quickly install, simplifies the process and greatly reduces the complexity of the equipment. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in
[0015] Figure 2 A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in Figure 1 A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in
[0016] A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in Figure 3 A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in Figure 1 A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in
[0017] In the drawings, reference numerals: 1, base; 2, first steel bottle; 3, second steel bottle; 4, vaporizer; 5, purification unit; 6, low-temperature cooling device; 7, arc plate; 8, rotating shaft; 9, closing plate; 10, connecting seat; 11, through hole. DETAILED DESCRIPTION
[0018] The utility model will be further described below in combination with the drawings and embodiments.
[0019] Please refer to Figure 1 , Figure 2 and Figure 3 , wherein Figure 1 A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in Figure 2 A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in Figure 1 A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in Figure 3 A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in Figure 1 A main structure perspective view of the liquefied gas purification device provided by the utility model is shown in
[0020] In the specific implementation process, as shown in Figures 1-3 , including base 1, the first steel bottle 2 and the second steel bottle 3 are symmetrically arranged above the base 1, the first steel bottle 2 is a source steel bottle for storing liquefied gas to be purified, and the second steel bottle 3 is a target steel bottle for accepting the gas after purification.
[0021] A vaporizer 4, a purification unit 5 and a low-temperature cooling device 6 are sequentially arranged between the first cylinder 2 and the second cylinder 3, the vaporizer 4 is an electric heating water bath type vaporizer, the purification unit 5 is specifically an adsorption column filled with molecular sieve, the low-temperature cooling device 6 is a low-temperature circulation refrigerating machine, a low-temperature metal hose is used to connect the first cylinder 2 and the vaporizer 4, a low-temperature stop valve with a vacuum jacket is installed at the outlet of the first cylinder 2 to prevent icing and jamming, and a check valve is installed before the inlet of the vaporizer to prevent gas backflow.
[0022] The vaporizer 4 and the purification unit 5 are connected through a stainless steel hard pipe and a flange, a pressure regulating valve is installed at the outlet of the vaporizer 4 to control the gasification pressure, such as 0.5-1.5 MPa, a particle filter (5 μm level) is arranged before the inlet of the purification unit 5 to prevent adsorbent blockage, an electric heating tape is installed on the pipeline to prevent the gasified gas from being liquefied again before purification, and a pressure gauge and a temperature sensor are arranged at the inlet of the purification unit to realize real-time monitoring.
[0023] The purification unit 5 and the low-temperature cooling device 6 are connected through a stainless steel hard pipe, a three-way valve is installed at the outlet of the purification unit 5 to select direct passage or bypass cooling device, and a throttle valve is installed before the inlet of the low-temperature cooling device 6 to control the gas flow rate and optimize the liquefaction efficiency.
[0024] The low-temperature cooling device 6 and the second cylinder 3 are connected through a low-temperature metal hose, a safety valve (with a set pressure of 90% of the rated value of the cylinder) is installed at the inlet of the second cylinder 3, a check valve is installed at the end of the pipeline to prevent the gas in the second cylinder 3 from flowing back, the second cylinder 3 needs to be pre-cooled before being connected, such as being flushed with liquid nitrogen, to avoid damage caused by thermal stress, and a self-sealing joint Quick Connect is used for the filling port and is provided with a pressure relief function.
[0025] Arc-shaped plates 7 are arranged on one side of the first cylinder 2 and the second cylinder 3, the arc-shaped plates 7 are fixed on the base 1, a rotating shaft 8 is movably arranged on one side of the arc-shaped plate 7, a closing plate 9 is fixed on one side of the rotating shaft 8, connecting seats 10 are fixed on the arc-shaped plate 7 and the closing plate 9, through holes 11 are formed in the connecting seats 10, and the two connecting seats 10 are connected through bolts.
[0026] The circuit and the control involved in the utility model are prior art, and will not be described in detail here.
[0027] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.
Claims
1. A liquefied gas purification device, comprising a base (1), characterized in that, A first steel cylinder (2) and a second steel cylinder (3) are symmetrically arranged above the base (1). A vaporizer (4), a purification unit (5) and a low-temperature cooling device (6) are arranged sequentially between the first steel cylinder (2) and the second steel cylinder (3).
2. The liquefied gas purification device according to claim 1, characterized in that, The first cylinder (2) is a source cylinder for storing liquefied gas to be purified, and the second cylinder (3) is a target cylinder for receiving purified gas.
3. The liquefied gas purification device according to claim 2, characterized in that, Both the first steel cylinder (2) and the second steel cylinder (3) are provided with an arc plate (7) on one side, and the bottom of the arc plate (7) is fixed on the base (1); A rotating shaft (8) is movably provided on one side of the arc plate (7), and a sealing plate (9) is fixed on one side of the rotating shaft (8). A connecting seat (10) is fixed on both the arc plate (7) and the sealing plate (9). A through hole (11) is provided on the connecting seat (10), and the two connecting seats (10) are connected by bolts.
4. The liquefied gas purification apparatus according to claim 3, characterized in that, The vaporizer (4) is an electrically heated water bath vaporizer.
5. The liquefied gas purification apparatus according to claim 4, characterized in that, The purification unit (5) is specifically an adsorption column filled with molecular sieves.
6. The liquefied gas purification apparatus according to claim 5, characterized in that, The low-temperature cooling device (6) adopts a low-temperature circulating refrigeration machine.