TH740B - The liquefied natural gas cycle at intense flashover - Google Patents

Abstract

Systems for making liquids And the less chilled natural gas where the compressed power is moved from the closed circuit refrigerant. The liquefied natural gas is less cold. To correlate with the warm temperature at that time And later reduce the pressure And flashed liquefied natural gas To separate natural gas in a gas state in excess of the plant's fuel requirements. The excess will be re-compressed and returned to the feeder through this process.

Claims (3)

1. In the process for producing liquefied natural gas Where the fed natural gas is liquefied And to cool less by exchanging heat with at least one closed circuit refrigerant. The improvements include eliminating the problem of mismatched air compressor drives. The liquefaction process is inefficient. Or the high cost of procuring equipment This can be done by cooling liquefied natural gas less to a warmer temperature. Reducing the pressure of fair gas The liquid that has been cooled less and less And flashover of that gas in at least one step of separation condition. Where natural gas flows in excess of the gas needed for factory fuel are recovered. And the surplus natural gas in gas condition has been compressed again and back for liquefaction. And cooling less In order to move the demand for closed-circuit refrigerant compression power to the demand for closed-circuit refrigerant compression to the demand in the reverse-current compression of natural gas 2. Process according to claim 1, where closed-circuit refrigerant consists of a mixture of several refrigerant components. 3. Process according to claim 1, where closed-circuit refrigerant is assembled. With the first cycle refrigerant with only refrigerant components Which will allow the natural gas to be cooled first And refrigerant closed circuit for the second circuit Containing many refrigerant components Which will turn the pre-cooled gas into a liquid 4. Process according to claim 1, where closed-circuit refrigerants consist of the first closed-circuit refrigerant with a mixture of refrigerant components. Which will cool the second circuit coolant first Refrigerant closed circuit, the second circuit consists of Mixture of refrigerant components Which makes natural gas a liquid 5. Procedure according to claim 1, where the vapor from liquefied natural gas in the lower current reservoir of the final flashover stage is re-compressed. And back to the natural gas stream in gas condition 6. Process according to claim 1, where the natural gas stream in gas condition is re-compressed by the process with post-cooling with the cooling fluid. 7. In a system for the production of liquefied natural gas, where the fed natural gas stream is liquefied. And cooling less with at least one closed circuit refrigerant circuit in a multi-channel heat exchanger. This update includes a device to solve the problem of mismatched air compressor drive. The liquefaction process is inefficient or costly to provide equipment, including (a) a section for reducing the pressure of the cooled liquefied natural gas, including at least one separation chamber. For the removal of the reverse current of the gaseous natural gas (b) the compression section for the recompression of the re-gasified natural gas from the separation chamber (c) the removal section of the compressed natural gas section And (d) the section for the introduction of the remaining compressed natural gas into the feeder natural gas stream 8. System according to claim 7, where the multi-channel heat exchanger There are two channels 9. The system according to claim 7 includes a pre-cooled closed-circuit refrigerant phase that is connected to a stream of natural gas and a less-cooled closed-circuit refrigerant with a 1 0. system. According to claim 7, including parts for reversing the vapor from the storage of liquefied natural gas to be re-compressed And the reverse instrument of the natural gas stream in gas condition 1 1. System according to claim 7, where part of paragraph (a) includes two separate pressure reductions. And the separation channel 1 2.The system according to claim 7 includes a heat exchanger for heating the natural gas in the back-flow condition again with the current in process 1. 3. The system according to claim 7 includes pipelines for the reverse flow of the natural gas backflow from the separation chamber to the fed natural gas stream.