Raw materials: rice husk, straw, herb, film, coconut shell
Advantages: fixed carbon, reproducibile, high volatile, low SO2 emmission, zero CO2 emmision
Biomass Pyrolysis Gasification Application
Biomass Gasification Thermoelectric Hydrogen Trigeneration System
Flow Chart Of Biomass Gasification Thermoelectric Hydrogen Trigeneration System
Plant Material Balance
|Raw Gas||Post-Membrane Pressurized Air||Vent After Membrane||Psa Product Gas||Psa Bleed Gas|
|O2 and others||1||0.1||1.2||≤10PPm||—|
Process Flow Description
The raw material gas comes from biomass gas. After pretreatment and purification to remove impurities such as tar and fly ash in the gas, it enters the raw material gas compressor and is pressurized to 1.9~2.1MPaG. The pressurized gas enters the skid-mounted membrane separation treatment skid to increase the hydrogen content of the raw gas to more than 60%, while reducing the content of other impurities in the raw gas (see the subsequent component table). Enter the gas buffer tank A. The preliminary purified gas of about 0.12MPaG is pressurized to 1.6MPaG by the interstage booster, and then enters the gas buffer tank B and then enters the subsequent PSA unit for purification. The purity of the PSA outlet gas reaches the requirement of 99.99%. Ensure that the working pressure of the PSA skid is stable at 1.6MPaG, and the product gas outlet pressure is 1.5MPaG. The device discharges the exhaust gas to the combustion pipeline or other application pipeline.
The system uses high-quality hydrogen membrane group to purify hydrogen initially. Small molecule gas such as hydrogen is fast gas, which is enriched to the low pressure side through the membrane; macromolecular gas has a slow permeation rate and is enriched to the high pressure side, and different gases are used to permeate the membrane group. The difference in the completion of the initial purification of hydrogen.
The pressure swing adsorption process is based on physical adsorption work. The rPSA process utilizes the contact of the solid adsorbent in the adsorbent material bed with the inlet gas to selectively adsorb specific components in the mixed gas at a higher pressure, so that the product gas is rich in gas. Reduce the specific component gas that is adsorbed during the chemical process. The design of rPSA can achieve selective removal of impurities such as CH4, CO, CO2, H2O, N2, etc. to meet the requirements of gas specifications.