CN-224229729-U - Supercharging system

CN224229729UCN 224229729 UCN224229729 UCN 224229729UCN-224229729-U

Abstract

The utility model provides a pressurizing system, which comprises a liquid outlet pipeline, a vaporizer, a buffer tank and a heat exchange loop, wherein the liquid outlet pipeline is communicated with a low-temperature container, the vaporizer and the buffer tank are both communicated with the liquid outlet pipeline, and the buffer tank is positioned at the downstream of the vaporizer, so that the buffer tank can store gaseous medium heated and vaporized by the vaporizer. The heat exchange loop is communicated with the buffer tank and is provided with the circulating pump and the heat exchange device, the circulating pump can drive gaseous medium in the buffer tank to flow along the heat exchange loop, the heat exchange device is connected to the low-temperature container, and the gaseous medium can exchange heat to the low-temperature container through the heat exchange device, so that heat carried by the gaseous medium is transferred to the low-temperature container, and liquid medium in the low-temperature container absorbs heat and is vaporized, the volume of the medium in the low-temperature container is increased, the pressure in the low-temperature container is improved, the pressure in the low-temperature container can be quickly increased when the low-temperature container is at a low liquid level, and liquid supply or air supply of the low-temperature container is facilitated.

Inventors

WANG XINDONG
LU JIANGFENG
ZHANG YAN
ZHANG LI

Assignees

张家港中集圣达因低温装备有限公司
中国国际海运集装箱(集团)股份有限公司
中集安瑞科投资控股（深圳）有限公司
张家港中集圣达因特种装备有限公司
张家港中集圣达因工程有限公司

Dates

Publication Date: 20260512
Application Date: 20250513

Claims (10)

1. A pressurization system disposed on a cryogenic vessel, the pressurization system comprising: The liquid outlet pipeline is communicated with the low-temperature container and is used for guiding out a liquid medium in the low-temperature container; the vaporizer is communicated with the liquid outlet pipeline to heat and vaporize the liquid medium in the liquid outlet pipeline to form a gaseous medium; The buffer tank is communicated with the liquid outlet pipeline and positioned at the downstream of the vaporizer for buffering the gaseous medium, and is provided with an air supply pipe for communicating with external air utilization equipment; the heat exchange loop is communicated with the cache tank; The heat exchange device is connected to the low-temperature container, so that the gaseous medium can exchange heat with the low-temperature container through the heat exchange device, and the liquid medium in the low-temperature container absorbs heat and is vaporized.
2. The supercharging system of claim 1 further comprising a pressure sensor in communication with the cryogenic vessel for detecting pressure within the cryogenic vessel and a controller in communication with the pressure sensor and the circulation pump, the controller controlling operation of the circulation pump to drive the flow of gaseous medium along the heat exchange circuit when pressure within the cryogenic vessel is below a predetermined pressure value.
3. The supercharging system of claim 1 wherein the heat exchange circuit is in communication with the vaporizer and the vaporizer is located downstream of the heat exchange device such that the vaporizer is capable of heating gaseous medium flowing through the heat exchange device.
4. The supercharging system of claim 2 further comprising a temperature sensor connected to the heat exchange circuit and located between the vaporizer and the buffer tank for detecting the temperature of the gaseous medium flowing back to the buffer tank.
5. The pressurization system of claim 1, further comprising a pressurization circuit having one end connected to a bottom of the cryogenic vessel and another end connected to a top of the cryogenic vessel, wherein a heat exchanger is disposed on the pressurization circuit to heat the liquid medium flowing through the pressurization circuit.
6. The supercharging system of claim 5, wherein a boost pressure regulating valve is in communication with the supercharging circuit, the boost pressure regulating valve being located between the cryogenic vessel and the heat exchanger for regulating pressure within the supercharging circuit.
7. The booster system of claim 1 further comprising a liquid inlet line, said liquid inlet line communicating with a top of said cryogenic vessel for filling said cryogenic vessel with a liquid medium, said liquid inlet line comprising a liquid inlet check valve, a main relief valve, and a pressure gauge, said liquid inlet check valve communicating with said liquid inlet line for limiting reverse flow of liquid medium in said liquid inlet line, said main relief valve and said pressure gauge communicating with said liquid inlet line and being positioned between said liquid inlet check valve and said cryogenic vessel.
8. The supercharging system of claim 1 wherein the outlet line is in communication with a liquid outlet check valve, a shut-off valve and a restrictor valve in sequence and is located between the cryogenic vessel and the vaporizer.
9. The supercharging system of claim 8 further comprising a safety branch connected to the outlet line and located between the outlet check valve and the shut-off valve, the safety branch being in turn connected to a pressure reducing relief valve and a secondary safety valve.
10. The supercharging system of claim 1 further comprising a liquid level sensor in communication with the cryogenic vessel for detecting liquid level information within the cryogenic vessel.

Description

Supercharging system Technical Field The utility model relates to the technical field of low-temperature pressure containers, in particular to a pressurizing system. Background Currently, the methods used in the market for increasing the pressure in a cryogenic container mostly use a pressurization circuit for pressurization. The pressurization circuit is mostly used for vaporizing liquid LNG in the cryogenic container, and after the LNG is vaporized and expanded, the gaseous LNG is guided into a gas-phase space in the cryogenic container, and a gas-phase pressure is built up above a liquid phase in the cryogenic container. However, in the pressurization mode, when the liquid in the low-temperature container is at a low liquid level or the internal volume of the low-temperature container is large, the pressurization speed of the pressurization system is low, and even pressurization cannot be performed, so that the pressurization effect cannot meet the requirement, and insufficient air supply to the outside of the low-temperature container is caused. Disclosure of utility model The utility model aims to provide a pressurizing system which can be used for pressurizing when a low-temperature container is at a low liquid level and improving the pressurizing speed. In order to solve the technical problems, the utility model adopts the following technical scheme: According to one aspect of the utility model, the pressurizing system is arranged on a low-temperature container and comprises a liquid outlet pipeline, a vaporizer, a buffer tank and a gas supply pipe, wherein the liquid outlet pipeline is communicated with the low-temperature container and is used for leading out liquid medium in the low-temperature container, the vaporizer is communicated with the liquid outlet pipeline and is used for heating and vaporizing the liquid medium in the liquid outlet pipeline to form gaseous medium, the buffer tank is communicated with the liquid outlet pipeline and is positioned at the downstream of the vaporizer and is used for buffering the gaseous medium, the buffer tank is provided with a gas supply pipe and is used for being communicated with external gas utilization equipment, a heat exchange loop is communicated with the buffer tank, a circulating pump and a heat exchange device are communicated with the heat exchange loop, the circulating pump is used for driving the gaseous medium in the buffer tank to flow along the heat exchange loop, and the heat exchange device is connected with the low-temperature container, so that the gaseous medium can exchange heat for the low-temperature container through the heat exchange device and the liquid medium in the low-temperature container absorbs heat. In one embodiment of the application, the pressurizing system further comprises a pressure sensor and a controller, wherein the pressure sensor is communicated with the low-temperature container and used for detecting the pressure in the low-temperature container, the controller is in communication connection with the pressure sensor and the circulating pump, and when the pressure in the low-temperature container is lower than a preset pressure value, the controller controls the circulating pump to work so as to drive the gaseous medium to flow along the heat exchange loop. In one embodiment of the application, the heat exchange circuit communicates with the vaporizer and the vaporizer is located downstream of the heat exchange device such that the vaporizer is capable of heating gaseous medium flowing through the heat exchange device. In one embodiment of the application, the pressurizing system further comprises a temperature sensor, wherein the temperature sensor is connected to the heat exchange loop and is positioned between the vaporizer and the buffer tank for detecting the temperature of the gaseous medium flowing back to the buffer tank. In one embodiment of the application, the pressurizing system further comprises a pressurizing circuit, one end of the pressurizing circuit is communicated with the bottom of the low-temperature container, the other end of the pressurizing circuit is communicated with the top of the low-temperature container, and a heat exchanger is arranged on the pressurizing circuit to heat the liquid medium flowing through the pressurizing circuit. In one embodiment of the application, the pressure increasing and regulating valve is communicated with the pressure increasing and regulating valve, and the pressure increasing and regulating valve is positioned between the low-temperature container and the heat exchanger and is used for regulating the pressure in the pressure increasing circuit. In one embodiment of the application, the pressurizing system further comprises a liquid inlet pipeline, wherein the liquid inlet pipeline is communicated with the top of the low-temperature container and used for filling liquid medium into the low-temperature container, the liquid inlet pipeline comprises a