Interlayer vacuumizing method for cryogenic vessel and special device thereof

A technology of vacuuming and vacuuming systems, applied in pressure vessels, fixed-capacity gas storage tanks, mechanical equipment, etc., can solve problems such as adverse effects, and achieve the goal of improving qualified indicators, improving container pumping quality, and shortening pumping time. Effect

Inactive Publication Date: 2013-04-17
SHANDONG HONGDA TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has adverse effects on maintaining vacuum and increasing the rate of leakage and deflation

Method used

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  • Interlayer vacuumizing method for cryogenic vessel and special device thereof

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Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1, a method for vacuuming the interlayer of a cryogenic container, is characterized in that: use heating equipment to heat the outer cylinder of the cryogenic container, and continuously fill N2 heated to 350-370°C into the inner tank of the cryogenic container, Control the inlet pressure at 0.4Mpa; the outlet pressure at 0.2Mpa, and use a vacuum pump to heat the interlayer 6 between the outer cylinder and the inner tank of the cryogenic vessel while heating the outer cylinder 4 and the inner tank 5 of the cryogenic vessel at the same time. Do a vacuum.

Embodiment 2

[0014] Embodiment 2, the special device used in the method of vacuuming the interlayer of cryogenic containers, is characterized in that: it includes an inner tank heating system, an outer cylinder heating device and an interlayer vacuuming system,

[0015] The inner tank heating system includes a nitrogen heating furnace 1, a hot nitrogen temperature measuring and pressure measuring device 2 installed between the nitrogen heating furnace and the nitrogen inlet pipe of the inner tank, and a nitrogen outlet temperature measuring and pressure measuring device installed on the nitrogen outlet pipe device 3,

[0016] The outer cylinder heating device 7 is a heating furnace capable of heating the entire outer cylinder,

[0017] The interlayer vacuum pumping system includes a vacuum pump 9, a vacuum valve and a vacuum measuring device 8.

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Abstract

The invention discloses an interlayer vacuumizing method for a cryogenic vessel, which belongs to vessels used for accommodating or storing compressed, liquefied or cured gases, particularly a manufacturing method of a cryogenic vessel, which comprises insulation measures. The interlayer vacuumizing method for the cryogenic vessel is characterized in that the outer cylinder body of the cryogenic vessel is heated by heating equipment, N2 heated to 350-370 DEG C is continuously injected into the inner container of the cryogenic vessel, and the inlet pressure is controlled to be 0.4 Mpa; and the outlet pressure is 0.2 Mpa, and in the state of heating the outer cylinder body and the inner container of the cryogenic vessel, a vacuum pump is used to vacuumize an interlayer between the outer cylinder body and the inner container of the cryogenic vessel. According to the invention, hot nitrogen higher than 350 DEG C is adopted to heat the inner container, and a heating furnace is adopted to heat the outer cylinder body so as to heat the inner container and the outer cylinder body at the same time, so that the bleeding rate of a substance in the interlayer is increased in the heated state to facilitate decomposing remaining water molecules and other substances, the vacuumizing efficiency and the vacuity of the interlayer are both improved and the qualified index of the bleeding rate is improved.

Description

technical field [0001] The invention belongs to a container for containing or storing compressed, liquefied or solidified gas, especially a method for manufacturing a cryogenic container with heat insulation measures. Background technique [0002] There are two methods used by various manufacturers of cryogenic container vacuuming technology: cold pumping and hot pumping. As far as thermal vacuuming is concerned, the traditional method is to place the equipment in a heating furnace for heating. The heated part is only the outer cylinder. The tank body is in a cold state, and the hot gas released from the interlayer filling material adheres to the outer wall of the inner cylinder to form secondary condensation, which increases the difficulty of vacuuming, prolongs the vacuuming time, and reduces work efficiency. It has adverse effects on maintaining the vacuum degree and improving the leakage and deflation rate indicators. Contents of the invention [0003] In order to ove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C1/12
Inventor 付资兑赵志刚
Owner SHANDONG HONGDA TECH GRP
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