Dedicated gas preparation device of vapour-pressure type multi-rod driving piston

Abstract

The invention discloses a dedicated gas preparation device of a vapour-pressure type multi-rod driving piston. The technical problem of that the material pressing force of the dedicated gas preparation device is not enough at present is resolved. The dedicated gas preparation device of the vapour-pressure type multi-rod driving piston comprises a container opening upwards. A seal cover covers an opening of the container. The dedicated gas preparation device of the vapour-pressure type multi-rod driving piston is characterized in that a head cover with an inner cavity is fixedly connected on the seal cover, a big piston and a small piston are respectively arranged in a container cavity of the container and the head cover cavity of the head cover, wherein the big piston and the small piston move up and down along walls of the cavities. A connecting rod is arranged between the seal cover and the head cover. The connecting rod penetrates through the small piston. The head cover cavity is divided into an upper hollow cavity and a lower hollow cavity by the small piston. The upper hollow cavity is communicated with a pressure gas inlet. The dedicated gas preparation device of the vapour-pressure type multi-rod driving piston is capable of providing larger material pressure force and particularly suitable for a large-size tower structure. And the pressure can be adjusted, and the piston always follows the materials and the materials can be compacted by the piston. Channeling dynamic gaps can be avoided.

Description

technical field [0001] The invention relates to the technical field of special gas preparation containers, in particular to a special gas preparation device for pneumatic multi-rod driven pistons. Background technique [0002] After the container for preparing nitrogen, oxygen and other special gases is filled with granular materials, it is necessary to compress the materials from the top and dynamically eliminate the space for the materials to move down, such as nitrogen generators, oxygen generators, adsorption gas purification dryers etc., the gas is adsorbed and separated by the adsorbent in the container. For example, the carbon molecular sieve in the tower body (container) of the pressure swing adsorption nitrogen generator preferentially adsorbs the oxygen molecules in the input air, so that the nitrogen molecules in the gas phase are enriched and produced. Nitrogen. In production, the granular adsorbent packed in the tower body needs to be compressed from the top. T...

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Problems solved by technology

During production, it is necessary to compact the granular adsorbent filled in the tower from the top. These equipments require a large compaction force, and the working pressure of the piston used to compact the material in the container is generally 0.4-0.8Mpa, that is, the piston is under pressure. The pressure is about 2800-5600kg. It is difficult for the commonly used spring compression structure to provide such a large working pressure, especially when the granular material moves down due to work (volume decreases and density increases), the piston needs to move down accordingly. In order to eliminate the space for materials to move down, avoid the pulverization of materials due to the collision between materials due to the existence of movement gaps, and lose the function of preparing special gases

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