A pressure regulating metering skid for liquefied natural gas equipment
A liquefied natural gas and metering skid technology, which is applied in gas/liquid distribution and storage, pipeline systems, mechanical equipment, etc., can solve the problems of complex natural gas components, affecting safe operation, and inability to regulate pressure, so as to reduce production and operation and equipment maintenance costs, continuous and uninterrupted pressure regulation and measurement, and the effect of reducing the stress damage of skid blocks
Active Publication Date: 2017-05-17
SICHUAN HONGDA PETROLEUM & NATURAL GAS
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Problems solved by technology
[0005] (1) The service life of the pressure regulating valve is short, and the natural gas composition at the inlet end is complex, which contains saturated water, mechanical dust and oil stains, and is not protected by filtration first. The pressure regulating valve is designed before the gas-liquid separator, which greatly reduces the The service life of the pressure regulating valve; in addition, when the pressure regulating valve is overhauled and replaced, the raw natural gas is bypassed by the pressure regulating valve, and the pressure of the raw material gas cannot be accurately adjusted, which will affect the smooth operation of the subsequent compressor and the production capacity of the device
[0006] (2) At the inlet and outlet ends of the natural gas pressure regulating metering skid, when the natural gas pressure is high, the stress impact on the entire skid is large, which affects safe operation
[0007] (3) When the wire mesh on the top of the gas-liquid separator needs to be repaired and replaced, the whole plant must be shut down, which will affect the normal operation of the work
[0008] (4) In a small liquefied natural gas plant, when the diameter of the gas-liquid separator is too small to open a maintenance hole, the top wire mesh demister cannot be replaced, which greatly reduces the service life of the gas-liquid separator
[0010] (1) Although this process effectively protects the pressure regulating valve and prolongs its service life, it cannot play the role of pressure regulation when the pressure regulating valve is damaged and needs to be repaired and replaced.
[0011] (2) At the inlet and outlet ends of the natural gas pressure regulating metering skid, when the natural gas pressure is high, the stress impact on the entire skid is large, which affects the safe operation of the metering skid
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[0032] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] see figure 1 , figure 1 Shown is a device structure schematic diagram of an embodiment of the pressure regulating metering skid for liquefied natural gas plant of the present invention; Device 4, pressure regulating valve 5, rectifier 6, flow meter 7, safety valve and venting pipeline 12, and pneumatic drain valve 8, safety valve and venting pipeline 12 are provided with a safety relief valve 11; The rectifier 6 is set before 7, which improves the measurement accuracy of the flowmeter 7, and effectively controls the accurate gas consumption of the raw natural gas and the total economic cost of the raw natural gas; the pressure regulating valve 5 is set on the branch road behind the gas-liquid separator 3, effectively Protec...
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The invention discloses a pressure regulating metering skid for liquefied natural gas equipment, which includes a skid-mounted base; a gas-liquid separator arranged sequentially on the skid-mounted base according to the natural gas flow direction; and two supports connected to the top of the gas-liquid separator. The branch circuit includes a basket filter, pressure regulating valve, rectifier and flow meter connected in sequence; the inlet and exhaust ends of the metering skid are also equipped with ripple compensation to prevent the stress damage of the skid caused by excessive natural gas pressure. There is also a bypass between the natural gas inlet and outlet of the gas-liquid separator for replacement during maintenance of the gas-liquid separator. The design of the metering skid of the present invention is more optimized and reasonable, the service life is effectively extended, and the pressure regulation and metering of raw natural gas can be truly realized continuously and uninterruptedly; and it is provided with two circuits, truly realizing the dual-circuit pressure regulation and metering functions. , effectively reducing production operation and equipment maintenance costs.
Description
technical field [0001] The invention relates to a skid-mounted device, in particular to a pressure regulating and metering skid for a liquefied natural gas device. Background technique [0002] With the development of the economy and the increasingly serious environmental problems, natural gas, as a clean energy, replaces oil and coal in the world's energy consumption pattern. In order to meet the growing energy demand for natural gas, in recent years, domestic Foreign natural gas liquefaction devices continue to emerge. In the natural gas liquefaction plant, the natural gas pressure regulating metering skid plays a vital role, because it is an important core device for the front-end trade measurement of natural gas and the stable pressure intake for the rear-end raw gas compressor, which is directly related to the entire liquefied natural gas The smooth operation of the installation plant, accurate measurement and LNG production capacity assessment. [0003] At present, i...
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IPC IPC(8): F17D3/01F17D3/18F17D3/14
Inventor 董碧军杨毅伍婷段生赞张文学
Owner SICHUAN HONGDA PETROLEUM & NATURAL GAS