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Product Description
DGH adsorption type hydrogen dryer
1.Working principle and function
DGH type hydrogen dryer is a special equipment to remove water vapor from hydrogen gas in the turbine generator.
The principle of the hydrogen dryer for drying hydrogen is: the magnetic circulation fan in the system is used to force the hydrogen to circulate, and the hydrogen with high humidity is passed through the absorption tower filled with molecular sieve, and after the absorption of water reaches saturation, its "regeneration function" can remove its own water vapor by heating, so as to restore its absorption capacity.
In a hydrogen desiccator, an embedded electric heater is used to heat the desiccant to vaporize the bound moisture, and at the same time an encapsulated hydrogen flows through the adsorption layer to take away the released water vapor, and the desiccant regains its initial properties, then the hydrogen (containing water vapor) is cooled and the condensate is discharged through a separator. It can be repeated.
The dryer itself has two absorption towers, when one of them is in the process of moisture absorption, the other one is in the process of regeneration, so the dryer can work continuously.
2. Main technical parameters
2.1. The gas to be dried - hydrogen
2.2. Condensation method: water cooling, inlet water temperature below 29℃ Celsius
2.3. Cooling water flow: 02t/h
2.4. Working pressure: 0.31Mpa
2.5.Design hydrogen flow rate: 0.25t/h
2.6. Outlet hydrogen dew point temperature (under working pressure) is less than -35℃
2.7. Temperature regulator of heater: set at 163℃
2.8. Power supply: 380V3PH50HZ
2.9. Heater: 1064 watts (each)
2.10. Fan: 0.5hp
2.11. Total power: 3.5KW
2.12. Desiccant: molecular sieve
2.13. Operation mode: automatic operation
3. Characteristics of DGH hydrogen drying device
3.1. The use of double cylinder switching adsorption dryer for hydrogen drying external circulation. A cylinder adsorption, another simple regeneration, regular alternating switching, so that the drying process is continuous. The molecular sieve composite other adsorbent, make full use of the different adsorption characteristics of various adsorbents, thus its adsorption capacity is larger than pure molecular sieve adsorbent, the single cylinder design capacity is 6kg of water, the depth of adsorption is high, and the dew point of hydrogen at the outlet of the drier can reach below -60C.
3.2. Adopting special magnetic drive fan, the wind pressure can be up to 24.5kPa or more, and the wind volume can be up to 250Nm'/h or more.SCH-I hydrogen booster fan has explosion-proof performance, the main working parts such as sliding plate, inner cavity of the shell, and air sealing components are made of non-metallic materials such as graphite, silicon carbide, etc., and the working part and the external air are completely isolated, and the fan adopts magnetic couplings, the inner and outer magnetic couplings are isolated through the intermediate isolation sleeve, the inner and outer magnetic couplings are isolated through the middle isolation sleeve. The fan adopts magnetic coupling, the inner and outer magnetic coupling are separated by the middle isolation sleeve, and the shaft seal is static sealing, which can eliminate the hidden danger of H leakage. After more than a year of continuous operation, the performance remains basically unchanged.
3.3. Adopting the method of regeneration of part of the hydrogen after drying in a closed circuit, it does not consume the regeneration gas source and does not emit the regeneration exhaust gas. After regeneration of hydrogen through the cooler and water separator, back to the inlet of the machine for circulation, separated from the water by the drain valve discharge on a regular basis.
3.4. A larger amount of hydrogen for external circulation (about 250Nm'/h). Two cycles are carried out simultaneously after pressurization by the same hydrogen booster. The main cycle for the drying cycle: generator to hydrogen (wet state) → fan pressurization → oil separator filtration → dry Jane drying → back to the generator (most of the hydrogen): the secondary cycle for the regeneration cycle: generator to hydrogen (wet state) → fan pressurization an oil separator filtration - drying cylinder drying a small portion of the hydrogen heated to regenerate the other drying cylinder → containing regeneration of the water of the hydrogen by the water cooler cooled water separator separation of water separation free water separated from the hydrogen returned to the fan inlet. The hydrogen with free water is returned to the inlet of the blower. By adjusting the drying gas and regeneration gas volume distribution ratio to adjust the hydrogen humidity inside the motor to meet the different requirements of the humidity inside the machine (so that the humidity inside the machine is not too low), the cycle of drying can be adjusted in the range of 30~200Nm'/h.
3.5. Because of the self-circulating fan, during the period of generator shutdown can still continue to dry the gas inside the generator - to maintain a certain degree of dryness inside the machine, eliminating the hidden danger that exists when the motor is shut down and then turned on again.
3.6. Gas circulation, switching between drying and regeneration, regeneration heating and moisture cooling are all automated.
4. Popular models.
DGH-I, DGH-II, DGH-III
DGH series can be substitute by QXG series.https://www.national-power-equipment.com/product/420.html