A low-pressure air continuous drying process and equipment
A drying process, low-pressure technology, applied in the field of low-pressure air continuous drying process and equipment, can solve the problems of fan operation and heating heat source, increase the consumption of cold blowing cooling water, waste heat energy of high-temperature gas, etc., and achieve the improvement of energy utilization , avoid driving and parking, and improve the utilization rate
Active Publication Date: 2020-06-30
SOUTHWEST RES & DESIGN INST OF CHEM IND
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Problems solved by technology
[0004] Since there is no need for the air drawn by the fan between the completion of heating regeneration and the completion of cooling by cooling, the fan and heater need to be turned off at this time, and the time interval for cooling by cooling is not long, so the fan and heater are frequently started and stopped. It has adverse effects on the operation of the fan and the supply of heating heat source. At the same time, the temperature of the gas exiting the adsorber is relatively high at the beginning of cold blowing and the middle and late stages of regeneration gas. This part of the heat is not used, which wastes the heat energy contained in the high-temperature gas and increases the cooling of the cold blowing water consumption, very uneconomical
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[0026] Such as figure 1 Shown is a low-pressure air continuous drying equipment of this embodiment, including a drying system, a regeneration system, and a cold blowing system; the drying system includes four temperature swing adsorbers, which are respectively adsorbers A, B, C, and D. The regeneration system includes a fan, a regeneration heat exchanger and a heater; the cold blowing system includes a cold blowing heat exchanger and a water cooler.
[0027] Such as figure 1 Shown a kind of low-pressure air continuous drying process, comprises the following steps,
[0028] (a) low-pressure air enters four temperature swing adsorbers for adsorption drying;
[0029] (b) The temperature swing adsorber is fed with regeneration gas for heating and regeneration;
[0030] (c) The temperature swing adsorber is fed with cold blowing air to cool down;
[0031] Among them, specifically, in this embodiment, the air volume treated by a single adsorber is 10000Nm 3 / h, dry air normal p...
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The invention relates to the field of air treatment and particularly relates to a low-pressure air continuous drying process and equipment. The process comprises the following steps: performing adsorption drying by adopting four temperature swing adsorbers; introducing resurgent gases into the temperature swing adsorbers for performing heating regeneration after drying completion, and finally introducing cold blowing gases for cooling. By planning four adsorbers and performing restrictive regulations on the located process stages, frequent startup and shutdown can be avoided, and a set of heating regeneration system and a cold blowing cooling system are saved, so that investment is reduced; the cold blowing gases and resurgent gases are subjected to heat recovery, and technical parametersare limited in the heat recovery process, so that the heat exchange process is optimized, the steps are simplified, the energy utilization rate is improved, the energy consumption is reduced, and theeconomic benefits are increased.
Description
technical field [0001] The invention relates to the field of air treatment, in particular to a low-pressure air continuous drying process and equipment. Background technique [0002] The field of aerospace experiments requires low-temperature air. In order to ensure that the water and carbon dioxide in the low-temperature air do not condense out, it is necessary to dry the air. Usually, an adsorbent is used to absorb water and carbon dioxide in the air. After the adsorption is saturated, heating and regeneration are used. The sorbent is regenerated. [0003] At present, the low-pressure air continuous drying process is a group of two adsorbers. At any time, one adsorber is in the adsorption drying process, and the other adsorber is heated and regenerated and cooled by cold blowing. The two adsorbers share the heating regeneration and cold blown cooling system. The regeneration system mainly includes a fan and a heater, and the heated regeneration gas is the atmosphere sucke...
Claims
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IPC IPC(8): B01D53/26
CPCB01D53/261
Inventor 蹇守华张杰陈玲彭奕伍毅邓晋许建平
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND