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After the steam is filtered by the filter, clean steam then enters the host cavity through the intake valve, and the volume of the cavity changes from large to small to compress the steam. The volume of the cavity is changed by the rotor rotating under the drive of the motor. The volume of the closed cavity formed by the rotor, the stator, the large and small end caps, and the sliding plates. Because the inner circle of the stator is eccentric and the rotor keeps the center of the shaft rotating, the sliding The volume between the slices changes according to its position. As the sliding amount of the slide changes from small to large and from large to small, the steam is sucked in when the volume cavity becomes larger, and compressed when it becomes smaller. The continuous rotation of the rotor completes the process of steam suction and compression. The compressed steam is discharged from the main engine cavity through the oil and gas separator through the upper left corner of the figure to lubricate and cool down through the lubricating oil system. The thermostat controls the high-temperature lubricating oil to flow directly from the main engine cavity to the oil filter to the cooler and through the fan After air cooling, it passes through the oil filter and enters the host cavity again and again. The heat energy generated when the steam is compressed is continuously blown out by the fan through the exchange of the cooler. The hot air blown by the cooler is generally 50°C higher than the room temperature.
Steam compressor form
According to the direction of the fluid passing through the impeller of the steam compressor, the related equipment is called an axial, mixed flow or centrifugal compressor. The most suitable compressor type depends on the operating conditions of the relevant application. The key parameters are the pressure rise to be achieved and the flow of steam to be compressed.
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In the evaporation industry, it is often operated in a vacuum range, the heating surface load is medium, and the temperature difference is small, so centrifugal and roots type recompressors are usually used.
Steam compressor applications
At present, domestic steam compressors are mainly used in chemical fields such as evaporation, crystallization, towers, and drying. The above industrial processes are also restricted by some factors. For example, in terms of drying, the low-temperature exhaust gas after drying contains a certain amount of non-condensable gas such as air and the compression ratio of the compression itself and other factors cause its recovery value to decrease.
On the other hand, due to the permeability of condensable gases, steam compressors can also use solvents to recover this aspect, such as methanol, ethanol, etc.