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A gas high-tightness slow-speed pressure regulation system and method

A high-sealing, fast-adjusting technology, applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as high prices and improve control capabilities.

Active Publication Date: 2021-09-28
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, because the neutron absorbing gas itself or the nuclear reaction product is very toxic and radioactive, and the price is very expensive, the pressure regulating system must have high sealing, high safety and low residual loss requirements

Method used

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  • A gas high-tightness slow-speed pressure regulation system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A process flow diagram of a slow-speed high-tightness slow-speed pressure regulating system, such as figure 1 shown. The slow pressure regulating system of the present invention is mainly composed of a gas circuit, a pneumatic pressure regulator, a driving gas cylinder, a gas storage tank, a vacuum pump, valves, pipelines and instruments, etc. The gas barrier is connected with the extra-heap suction bed and other equipment such as gas circulation pump to form a high-tight forced circulation circuit. The pneumatic pressure regulator is respectively connected with the pressure regulation branch of the gas circuit, the intake pipeline and the exhaust pipeline. The high-sealed slow-speed pressure regulating system sucks and compresses the process gas in the gas circuit through the pressure-driven and vacuum-driven double-acting metal bellows diaphragm pressure regulator to control the pressure of the reaction gas barrier. The slow-speed pressure regulation system of the pr...

Embodiment 2

[0035] The difference between this implementation example and Example 1 is that when it is necessary to further reduce the pressure at the reaction gas barrier to negative pressure, the present invention uses a double-acting metal bellows diaphragm pressure regulator driven by air pressure and vacuum to perform suction and compression of the gas circuit. Medium gas, to reduce the pressure of the reaction gas screen to below normal pressure, and expand the pressure adjustment range. The specific setting method is as follows:

[0036] In order to pump the process gas of the gas circuit into the bellows air chamber of the inner chamber of the pneumatic pressure regulator as much as possible, so as to increase the maximum line power value of the transient irradiation power of the fuel element, the present invention uses the exhaust pipe of the pneumatic pressure regulator There are two branches in the road, one branch is connected to the ventilation center for direct discharge, and...

Embodiment 3

[0038] The difference between this embodiment and embodiment 1 or embodiment 2 is that in order to adjust the pressure difference and store the leaked driving gas, the present invention adds a gas storage tank at the end of the exhaust pipeline. In order to ensure that the bellows of the pneumatic pressure regulator breaks due to excessive pressure difference or other reasons during the pressure regulation process, the present invention installs a pressure sensor and a leak detector on the pneumatic pressure regulator, and the pneumatic pressure regulation system is designed as a multi-stage containment Anti-leakage measures to ensure the safety and reliability of the test, the specific settings are as follows:

[0039] Both the inner chamber and the outer chamber of the pneumatic pressure regulator of the present invention are equipped with pressure sensors to monitor the pressure on both sides and the pressure difference between them in real time. rupture. The exhaust pipel...

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Abstract

The invention discloses a gas high-tightness slow-speed pressure regulation system and method. It consists of a gas circuit, a pneumatic pressure regulator, a driving gas cylinder, a vacuum pump, a gas storage tank, valves, pipes and instruments. The pneumatic pressure regulator is separated from the driving gas and the process gas by a metal bellows diaphragm, and the driving gas cylinder is filled with the driving gas into the pneumatic pressure regulator through the intake pipeline, and the air pressure drives the bellows chamber to compress the process gas, increasing the reaction gas barrier in the gas circuit pressure. The driving gas in the pneumatic pressure regulator is discharged to the ventilation or gas storage tank through the exhaust pipeline to reduce the pressure of the reaction gas screen; the vacuum pump can also be used to vacuum the pneumatic pressure regulator to drive the process gas in the gas circuit, and the reaction The air barrier pressure is reduced to negative pressure. The entire system controls the pressure regulation process through instruments and valves, and is sealed with all-metal materials and provided with multi-level anti-leakage measures. The invention can be used for pressure performance test of gas purification and purification equipment, nuclear fuel power transient test and the like.

Description

technical field [0001] The present invention relates to the field of gas test in chemical industry and nuclear fuel power transient test, in particular to a gas high-seal slow-speed pressure regulating system and method, which can be used in various occasions such as petroleum and natural gas, gas fine chemical industry, electronic gas, nuclear chemical industry, etc. It can also be used to study the irradiation behavior of nuclear fuel elements under various conditions such as power jump, power cycle and load follow. Background technique [0002] In fine chemical industry, the pressure conditions in gas purification and purification equipment determine the efficiency of the purification process and the reliability of the equipment. Studying the static and dynamic performance of gas purification and purification equipment during various slow pressure continuous changes can understand the influence of pressure on the efficiency of gas purification and purification process. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D1/02F17D3/01F17D5/00F17D5/02
CPCF17D1/02F17D3/01F17D5/005F17D5/02
Inventor 李炳林汪海刘晓松冯明全孙胜张帅曹娜张亮斯俊平傅源杰
Owner NUCLEAR POWER INSTITUTE OF CHINA