Mixed refrigerant recovery and reinjection process and device

A technology for mixing refrigerants and refrigerants, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of difficult refrigerant recovery, high energy consumption in the liquefaction process, and complicated operations, and improve the adaptability to changing conditions. , the effect of reducing loss

A technology for mixing refrigerants and refrigerants, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of difficult refrigerant recovery, high energy consumption in the liquefaction process, and complicated operations, and improve the adaptability to changing conditions. , the effect of reducing loss

CN104913554AActive Publication Date: 2015-09-16XINDI ENERGY ENG TECH
5 Cites 6 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mixed refrigerant recovery and reinjection process and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The invention provides a mixed refrigerant recovery process, which is suitable for recovering the mixed refrigerant in the refrigerant circulation system, that is, the cold box and the refrigerant compressor when the mixed refrigerant liquefaction device is shut down; the natural gas is liquefied in the cold box , the heat exchange component in the cold box is a plate-fin heat exchanger.

[0020] Further description below in conjunction with accompanying drawings.

[0021] When the liquefaction unit is in normal operation, its process includes natural gas liquefaction and mixed refrigerant cycle:

[0022] Natural gas liquefaction: The raw natural gas first enters the first channel 1 of the plate-fin heat exchanger for pre-cooling, and after being cooled to -30°C ~ -60°C, it enters the heavy hydrocarbon separator V-1 for gas-liquid separation. The liquid separated from the bottom of the separator V-1 is heavy hydrocarbons, and the gas phase stream separated from the top...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a mixed refrigerant recovery and reinjection process in a natural gas liquefying device. The process includes the steps of adding a special channel to a fin type heat exchanger, wherein the special channel is used for recovering mixed refrigerant in a refrigerant circulating system; arranging a special device and a special pipeline to reinject the mixed refrigerant into a refrigerant system. The mixed refrigerant recovery and reinjection process and device are suitable for recovering and reinjecting the refrigerant when the refrigerant liquefying device is stopped and started again and recovering and reinjecting the refrigerant when the refrigerant ratio is adjusted, and the problems that refrigerant recovery is difficult, and the liquefying device is poor in variable-working-condition adaptive capacity are solved.

Description

technical field [0001] The invention relates to a process and device for recovering and reinjecting mixed refrigerant, in particular to a process and device for recovering and reinjecting mixed refrigerant in a natural gas liquefaction device when the mixed refrigerant liquefaction device is shut down or when the refrigerant ratio is adjusted. Background technique [0002] The natural gas liquefaction process adopted by the natural gas liquefaction plant has several different types, which can be divided into the following three types according to the refrigeration method: cascade liquefaction process, mixed refrigerant liquefaction process, and liquefaction process with expander. The cascade liquefaction process has the lowest energy consumption, but has many moving equipment and complicated operation; the liquefaction process with an expander has the disadvantages of high energy consumption and relatively complicated operation; the advantage of the mixed refrigerant liquefac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
16 Sep 2015
Publication
CN104913554A
IPC
F25B45/00; F25J1/02
CPC
F25J1/0055; F25J1/0022; F25J1/0212; F25J1/0247; F25J1/0249; F25J2240/60; F25B45/00; F25J1/0279
Inventors
张生; 何振勇