Multifunctional combined low dew point dryer

Abstract

The invention discloses a multifunctional combined low dew point dryer, comprising a cold dryer, wherein a refrigeration system of the cold dryer comprises a refrigeration compressor, a condenser, anexpansion valve, an evaporator and a refrigeration compressor in sequence according to a refrigerant flow direction; an air system comprises an air inlet to a heat exchanger, the evaporator, a gas-liquid separator, and the heat exchanger to an air outlet in sequence according to an air flow direction; and the dryer further comprises an aftercooler and a suction dryer. The combined dryer can be used as a plurality of devices through various valve switches to treat compressed air of various air intake conditions and save regenerated gas consumption, and the waste heat of various devices is further utilized to reduce the space occupied by the devices.

Description

technical field [0001] The invention relates to the technical field of gas filtration and drying equipment, in particular to a multifunctional combined low dew point dryer. Background technique [0002] The low dew point dryers on the market now simply combine the freeze dryer and the adsorption dryer. The equipment can only be used in a certain small range. The working process is as follows: figure 1 As shown, the principle is as follows: 1) The refrigerated dryer is based on the principle of refrigerated dehumidification, and the high-temperature and high-humidity compressed gas is exchanged with the refrigeration system composed of evaporators, compressors, condensers and other components to cool down to obtain the ideal temperature. For finished gas, the dew point can generally reach 0-10°C. 2) When the adsorption dryer is adsorbed at room temperature, the heatless regenerative adsorption dryer is based on the principle of pressure swing adsorption (PSA), using the char...

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Problems solved by technology

3) According to the above information, it is concluded that the refrigeration dryer has no gas volume loss and low energy consumption, but has a limitation of dew point temperature, while the adsorption dryer has large regeneration gas loss and high energy consumption, but the product gas dew point is low

[0004] 1. The equipment can only simply handle compressed air with an inlet temperature ≤ 45°C and a working pressure of 0.6-1.0MPa, which cannot meet various inlet temperature conditions

[0005] 2. The regeneration air consumption is relatively large. The theoretical regeneration air consumption of the combined dryer is 3%-5%. The actual regeneration air consumption is affected by the performance of the adsorbent, which is much larger than the theoretical data, which is not conducive to responding to the national energy conservation and environmental protection policy.

[0006] 3. There is no good use of waste heat from various equipment, which is not conducive to further energy-saving and environmental protection measures

[0007] 4. The function is single, and it is impossible to use the same device to meet the user's requirements for various performance parameters such as "intake temperature, regeneration air consumption, pressure dew point and utilization of equipment waste heat" at any time

[0008] 5. If you want to meet various requirements, you need to purchase a variety of equipment, resulting in a lot of purchase funds and a large area

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