Adsorption type natural gas ship system

Abstract

The utility model relates to the technical field of new energy, and discloses an adsorption type natural gas ship system which comprises a supercharging device, a drying device, an adsorption type cabin, a control center, a gas generator set and a gas power system. And a flow regulating valve, a flow meter and a stop valve are connected between the drying device and the adsorption type cabin. Compared with the prior art, the adsorption type natural gas ship system has the advantages that the adsorption type cabin takes a polymer activated carbon material as an adsorbent to adsorb pressurized and purified natural gas, so that the adsorption type natural gas ship system has the advantages of simple system, low equipment cost, high storage and transportation efficiency, strong offshore adaptability, high storage and transportation safety coefficient and the like; the novel design can effectively solve the problem of storage and transportation of submarine natural gas, and can be widely applied to development of submarine natural gas.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to an adsorption type natural gas ship system. Background Art

[0002] Subsea natural gas is a kind of energy stored in the seabed with huge reserves, mainly including natural gas hydrate (combustible ice) and shallow seabed gas. Its main component is methane, which has the characteristics of strong firepower and high calorific value. It is a clean energy without smoke, toxicity and waste. Generally, it is necessary to build an offshore platform during the mining process. After being processed, the natural gas produced by drilling generally needs to be stored and transported through pipelines or on-site liquefaction. There are problems such as high technical difficulty, high construction cost and high safety risk, which greatly hinder the process of exploitation and utilization of submarine natural gas.

[0003] In order to solve the problem of storage and transportation of submarine natural gas, an adsorption-type natural gas ship system is proposed. The ship adopts the principle of physical adsorption, that is, methane molecules are attached to the inner surface of the adsorbent micropores through van der Waals force, thereby increasing the storage density of natural gas. A special adsorbent for natural gas with a high specific surface area is loaded in the cabin, and its huge internal surface area and rich microporous structure are used to adsorb and store natural gas at room temperature and medium pressure. Its biggest advantage is that it can obtain a storage energy density close to that of compressed natural gas under high pressure at low pressure (4.0MPa), which can ensure the maximum storage and transportation efficiency of natural gas. Adsorption-type natural gas ships can dock at sea, store and transport the extracted natural gas to the port, and deliver it to the natural gas pipeline network.

[0004] Since the adsorption natural gas ship system has the advantages of simple system, low equipment cost, high storage and transportation efficiency, strong offshore adaptability and high storage and transportation safety factor, it can effectively solve the storage and transportation problems of submarine natural gas. Therefore, it can be widely used in the development of submarine natural gas and has huge economic and social benefits. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an adsorption type natural gas ship system.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: including a booster device, a drying device, an adsorption cabin, a control center, a gas generator set and a gas power system, the booster device and the drying device, the drying device and the adsorption cabin, the adsorption cabin and the gas power system, and the adsorption cabin and the gas generator set are all connected by pipelines, and a flow regulating valve, a flow meter and a cut-off valve are sequentially connected to the pipeline between the drying device and the adsorption cabin;

[0007] The adsorption cabin includes an adsorption tank, an adsorbent, a filter screen, a safety valve, and a pressure gauge. The adsorbent is filled inside the adsorption tank. The filter screen is connected and arranged inside the adsorption tank, and both the safety valve and the pressure gauge are connected and arranged outside the adsorption tank. The adsorption tank has a cylindrical structure. The adsorbent is a nano-scale activated carbon with a multi-microporous structure, its specific surface area is greater than 3000 m2 / g, the micropore diameter is 1-2 nanometers, and the pore volume ratio is greater than 85%.

[0008] As a further description of the above technical solution:

[0009] The pressurization device includes a three-phase separator, a precision filter, and a gas direct-drive compressor unit. The gas direct-drive compressor unit is a compressor structure driven by a natural gas engine. The compressor is an oil-free piston compressor, and both between the three-phase separator and the precision filter, and between the precision filter and the gas direct-drive compressor unit are connected by pipelines.

[0010] As a further description of the above technical solution:

[0011] The adsorption cabin further includes control valves A, B, C, and D. Between the adsorption tank and the cut-off valve, between the adsorption tank and the gas generator set, and between the adsorption tank and the gas power system are all connected by pipelines. And control valve A is connected and arranged on the pipeline between the adsorption tank and the cut-off valve, control valve B is connected and arranged on the pipeline between the adsorption tank and the gas power system, control valve C is connected and arranged on the pipeline between the adsorption tank and the gas generator set, and control valve D is connected by a pipeline and arranged outside the adsorption tank.

[0012] As a further description of the above technical solution:

[0013] The control center is electrically connected to the pressurization device, the drying device, the adsorption cabin, the gas generator set, and the gas power system.

[0014] As a further description of the above technical solution:

[0015] The drying device has a double-tower structure. The drying device includes tower A and tower B. The upper ends and the lower ends of tower A and tower B are all connected by pipelines. And the gas direct-drive compressor unit is connected to the pipelines at the lower ends of tower A and tower B, and the pipelines at the upper ends of tower A and tower B are connected to the flow regulating valve.

[0016] The present utility model has the following beneficial effects:

[0017] In this utility model, the adsorption type cabin uses a polymer activated carbon material as an adsorbent to adsorb the pressurized and purified natural gas, ensuring that the adsorption type natural gas ship system has the advantages of simple system, low equipment cost, high storage and transportation efficiency, strong adaptability to the sea, and high storage and transportation safety factor. This novel design can effectively solve the problem of storing and transporting natural gas under the sea and can be widely applied to the development of natural gas under the sea. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of a system of an adsorption type natural gas ship system proposed by this utility model.

[0019] Legend Explanation:

[0020] 01, pressurizing device; 02, drying device; 03, flow regulating valve; 04, flowmeter; 05, cut-off valve; 06, adsorption type cabin; 07, control center; 08, gas generating set; 09, gas power system; 0101, three-phase separator; 0102, precision filter; 0103, gas direct drive compressor unit; 0601, adsorption tank; 0602, adsorbent; 0603, filter net; 0604, safety valve; 0605, pressure gauge; 0606, control valve A; 0607, control valve B; 0608, control valve C; 0609, control valve D. Specific Embodiment

[0021] Next, the technical solutions in the embodiments of this utility model will be clearly and completely described in conjunction with the drawings in the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, rather than all the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of this utility model.

[0022] Refer to Figure 1 This utility model provides an embodiment:

[0023] It includes a pressurizing device 01, a drying device 02, an adsorption type cabin 06, a control center 07, a gas generating set 08 and a gas power system 09. Between the pressurizing device 01 and the drying device 02, between the drying device 02 and the adsorption type cabin 06, between the adsorption type cabin 06 and the gas power system 09, and between the adsorption type cabin 06 and the gas generating set 08, they are all connected by pipelines. And on the pipeline between the drying device 02 and the adsorption type cabin 06, a flow regulating valve 03, a flowmeter 04 and a cut-off valve 05 are successively connected.

[0024] The adsorption cabin 06 includes an adsorption tank 0601, an adsorbent 0602, a filter screen 0603, a safety valve 0604, and a pressure gauge 0605. The adsorbent 0602 is filled and arranged inside the adsorption tank 0601. The filter screen 0603 is connected and arranged inside the adsorption tank 0601. Both the safety valve 0604 and the pressure gauge 0605 are connected and arranged outside the adsorption tank 0601. The adsorption tank 0601 is of a cylindrical structure. The adsorbent 0602 is a nano-scale activated carbon with a multi-microporous structure, its specific surface area is greater than 3000 m2 / g, the micropore diameter is 1-2 nanometers, and the pore volume ratio is greater than 85%;

[0025] The pressurizing device 01 performs rough purification and compression pressurization on the mined natural gas hydrate. After separating solid particles and moisture in the natural gas, it is pressurized to the rated adsorption pressure of 4.0 Mpa. The pressurizing device 01 includes a three-phase separator 0101, a precision filter 0102, and a gas direct-drive compressor unit 0103. The gas direct-drive compressor unit 0103 is a compressor structure driven by a natural gas engine. The compressor is an oil-free piston compressor. Both between the three-phase separator 0101 and the precision filter 0102, and between the precision filter 0102 and the gas direct-drive compressor unit 0103 are connected by pipelines;

[0026] The adsorption cabin 06 further includes a control valve A 0606, a control valve B 0607, a control valve C 0608, and a control valve D 0609. Between the adsorption tank 0601 and the cut-off valve 05, between the adsorption tank 0601 and the gas generator set 08, and between the adsorption tank 0601 and the gas power system 09 are all connected by pipelines. And the control valve A 0606 is connected and arranged on the pipeline between the adsorption tank 0601 and the cut-off valve 05. The control valve B 0607 is connected and arranged on the pipeline between the adsorption tank 0601 and the gas power system 09. The control valve C 0608 is connected and arranged on the pipeline between the adsorption tank 0601 and the gas generator set 08. The control valve D 0609 is connected by a pipeline and arranged outside the adsorption tank 0601;

[0027] The control center 07 is electrically connected to the pressurizing device 01, the drying device 02, the adsorption cabin 06, the gas generator set 08, and the gas power system 09;

[0028] The drying device 02 is of a double-tower structure. The drying device 02 includes tower A and tower B. The upper ends and the lower ends of tower A and tower B are all connected by pipelines. And the pipeline of the gas direct-drive compressor unit 0103 is connected to the lower ends of tower A and tower B. The pipeline at the upper ends of tower A and tower B is connected to the flow regulating valve 03. And the drying device 02 operates in a cycle mode of tower A adsorption - tower B regeneration - tower B adsorption - tower A regeneration.

[0029] Working principle: First, fix the adsorption tank (0601) on the internal deck of the ship. Then, let the mined natural gas hydrate enter the three-phase separator 0101, and roughly separate the solid particles and moisture in the natural gas through the mechanical separation principle. The roughly purified natural gas enters the precision filter 0102, and precisely separates the particles and moisture in the natural gas through the interception and coagulation separation principle. The gas direct-drive compressor unit 0103 uses the dehydrated and purified natural gas as fuel to boost the purified natural gas to the rated adsorption pressure of 4.0 MPa.

[0030] The boosted natural gas enters the drying device 02. The two towers of the drying device 02 work in a cycle of tower A adsorption - tower B regeneration - tower B adsorption - tower A regeneration to remove the tiny water droplets and free water in the natural gas to below 1 ppm.

[0031] The natural gas after deep purification enters the flow control valve 03, flowmeter 04 and cut-off valve 05, automatically adjusts the rated adsorption flow of the natural gas, and enters the inside of the adsorption tank 0601 in the adsorption cabin 06, and the adsorbent 0602 adsorbs the natural gas.

[0032] The control center 09 collects the working pressure signal inside the adsorption tank 0601 and the flow signal of the flowmeter 04 through the pressure gauge 0605, performs arithmetic processing on the signals, and sends the control signals to the gas direct-drive compressor unit 0103, flow control valve 03, cut-off valve 05 and control valve A0606 to stabilize the working pressure of the control system and the adsorption flow of the adsorption tank 0601.

[0033] When the adsorption flow of the adsorption tank 0601 reaches the rated adsorption storage capacity, the cut-off valve 05 and control valve A0606 close, and the gas direct-drive compressor unit 0103 stops running.

[0034] The adsorption cabin 06 supplies the adsorbed natural gas as fuel to the gas generator set 08 through the control valve C0608, and the gas generator set 08 outputs electricity to the electrical equipment in the cabin.

[0035] The adsorption cabin 06 supplies the adsorbed natural gas as fuel to the gas power system 09 through the control valve B0607, and the gas power system 09 outputs power to drive the propeller to drive the ship.

[0036] The adsorption cabin 06 desorbs and releases the adsorbed natural gas into the gas pipeline network of the user end through the control valve D0609.

[0037] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An adsorption type natural gas ship system, characterized in that: The invention comprises a pressurizing device (01), a drying device (02), an adsorption cabin (06), a control center (07), a gas generator set (08) and a gas power system (09); the pressurizing device (01) and the drying device (02), the drying device (02) and the adsorption cabin (06), the adsorption cabin (06) and the gas power system (09), and the adsorption cabin (06) and the gas generator set (08) are all connected by pipelines, and a flow regulating valve (03), a flow meter (04) and a shut-off valve (05) are sequentially connected to the pipeline between the drying device (02) and the adsorption cabin (06); The adsorption type cabin (06) comprises an adsorption tank (0601), an adsorbent (0602), a filter (0603), a safety valve (0604), and a pressure gauge (0605). The adsorbent (0602) is filled in the adsorption tank (0601), the filter (0603) is connected to the inside of the adsorption tank (0601), and the safety valve (0604) and the pressure gauge (0605) are both connected to the outside of the adsorption tank (0601). The adsorption tank (0601) is a cylindrical structure. The adsorbent (0602) is a nano-scale activated carbon with a multi-microporous structure, and its specific surface area is greater than 3000m 2 / g, the micropore diameter is 1-2 nanometers, and the pore volume ratio is greater than 85%.

2. The adsorption type natural gas ship system according to claim 1, characterized in that: The boosting device (01) comprises a three-phase separator (0101), a precision filter (0102) and a gas-fired direct-drive compressor unit (0103); the gas-fired direct-drive compressor unit (0103) is a compressor structure driven by a natural gas engine; the compressor is an oil-free piston compressor; and the three-phase separator (0101) and the precision filter (0102), and the precision filter (0102) and the gas-fired direct-drive compressor unit (0103) are connected via pipelines.

3. The adsorption type natural gas ship system according to claim 1, characterized in that: The adsorption type cabin (06) further comprises a control valve A (0606), a control valve B (0607), a control valve C (0608) and a control valve D (0609); the adsorption tank (0601) and the cut-off valve (05), the adsorption tank (0601) and the gas generator set (08), and the adsorption tank (0601) and the gas power system (09) are all connected via pipelines, and the control valve A (0606) is connected to the pipeline between the adsorption tank (0601) and the cut-off valve (05); the control valve B (0607) is connected to the pipeline between the adsorption tank (0601) and the gas power system (09); the control valve C (0608) is connected to the pipeline between the adsorption tank (0601) and the gas generator set (08); and the control valve D (0609) is connected to the outside of the adsorption tank (0601) via a pipeline.

4. The adsorption type natural gas ship system according to claim 1, characterized in that: The control center (07) is electrically connected to the pressurizing device (01), the drying device (02), the adsorption cabin (06), the gas generator set (08) and the gas power system (09).

5. The adsorption type natural gas ship system according to claim 2, characterized in that: The drying device (02) is a double-tower structure, and the drying device (02) includes a tower A and a tower B. The upper ends of the towers A and B and the lower ends of the towers A and B are connected by pipelines, and the gas direct-driven compressor unit (0103) is connected to the pipelines at the lower ends of the towers A and B, and the pipelines at the upper ends of the towers A and B are connected to the flow regulating valve (03).

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