Vacuuming drying room for vacuum-insulated cryogenic equipment

Abstract

The invention discloses a vacuuming drying room for vacuum-insulated cryogenic equipment. The vacuuming drying room for the vacuum-insulated cryogenic equipment comprises the drying room, a drying room door, multilayer insulating containers in the drying room, an outer circulating air system, an inner circulating air system, a control system for temperature and pressure and a replacing system for hot air. The outer circulating air system comprises a hot-air furnace, an outer circulating fan, an outer circulating air-supply pipe, an outer circulating air-return pipe and an automatic control system. The inner circulating air system comprises an inner circulating fan, an inner circulating air-return pipe and an inner circulating fan and an electric heater which are arranged on an inner circulating air-supply pipe. The control system for temperature and pressure comprises an induced draft fan, a bypass air hose, a stop valve and a temperature sensor and a differential pressure sensor which are connected with a PLC system. The vacuuming drying room for the vacuum-insulated cryogenic equipment has the advantages of being energy-saving and cost-reducing, safe, environmental-friendly and stable in operation; 10-15% of energy can be saved compared with resistance heating, escape of hot air is avoided, the environment cannot be influenced, big fluctuation of the temperature in the drying room can be avoided, and balance degree of temperature in the drying room is guaranteed.

Description

technical field [0001] The invention relates to a vacuum drying room for vacuum insulation and cryogenic equipment, in particular to a drying room device for the high temperature environment where the vacuum insulation and cryogenic equipment is located during the vacuuming process, which is energy-saving, safe and environmentally friendly , A new type of drying room device with stable operation. Background technique [0002] With the development of the low-temperature adiabatic storage and transportation industry becoming more and more mature, various researches affecting the low-temperature adiabatic storage and transportation are also flourishing. Low temperature insulation mainly includes vacuum insulation, vacuum powder insulation, vacuum fiber insulation and high vacuum multilayer insulation. Among them, high-vacuum multi-layer insulation is favored due to its good insulation performance and simple process. It is widely used in small low-temperature insulation contain...

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Problems solved by technology

[0004] 1) The electric heating element used in resistance heating is usually nickel-chromium alloy (below 1000°C), and the working voltage of the electric heating element should not be too high, because the insulation resistance of the refractory material drops sharply at high temperature, the evaporation of the electric heating element increases, and the surface of the insulator The conductivity increases, and arc discharge is easy to occur between electrodes, which increases the danger in work

If the voltage is too high, the heating element will be thin and long, which

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