Environmental protection refrigerating hydrogen drying unit

Abstract

The invention relates to a hydrogen drying device through refrigerating which can protect the environment. Said device primarily comprises a deep cooling thermal expansion valve 1, an original cooling thermal expansion valve 2, a supporting triple valve 3, a air venting triple valve 4, a refrigerant compressor 5, a low pressure gage 6, a pressure controller 7, a high pressure gage 8, an air condenser 9, a liquid tanker 10, a cut-off valve 11, a drying filter 12, a liquid visible glass 13, a magnetic valve 14, a draw-off valve 15, a tank 16, a deep cooling desiccating dryer 17, an original cooling desiccating dryer 18, electrical controller 19, circle heat exchanger 20. Said invention can eliminate the water in the hydrogen effectively, and the drying degree of the hydrogen can reach to the dew-point below the required.

Description

technical field [0001] The present invention relates to a method and device for dehumidifying and drying hydrogen, and more specifically relates to an efficient and environment-friendly refrigeration-type hydrogen drying method and device for cooling hydrogen in a hydrogen production station of a power plant and a hydrogen-cooled generating set. Background technique [0002] Most of the main motor units (200-600MW) of my country's power grid adopt water-hydrogen-hydrogen or all-hydrogen cooling mode. The hydrogen humidity in the generator increases due to water seepage in internal wire rods, water joints, water boxes and other parts. Excessive hydrogen humidity will seriously affect the ground insulation of the stator and rotor windings of the generator, and will also accelerate the stress corrosion of the protective ring, thereby affecting the efficiency of the generator set and the operation safety of the power plant. In the past ten years, there ha...

AI Technical Summary

Problems solved by technology

[0004] The refrigeration depth and drying degree of the current refrigerated hydrogen dryer can hardly meet the requirements of the current power industry standard DL / T 651-1998 on the humidity of hydrogen in the generator set

According to the investigation of hydrogen humidity in several power plants, it is found that the hydrogen humidity in the machine is generally high, and there is still a certain gap with the new standard

And there are more or less problems such as unstable operation performance, serious external corrosion, failure to achieve online drying, centralized control, etc.

With the strengthening of national environmental protection law enforcement, the development and application of refrigeration and drying technology using Freon R12 or R22 as refrigerant has been restricted

Images