High Efficient PSA Hydrogen Plant, Hydrogen Recovery Unit From Coke
Oven Gas
General
In the production process of coking, iron making and steelmaking,
iron and steel enterprises produce a large number of gas
by-products, among which H2 is high in content, which is a commonly
used gas fuel and also an important secondary energy source. Making
full use of the by-product gas of iron and steel enterprises can
not only save a lot of fuel, but also extract clean fuel from it,
eliminate a large amount of gas discharge, and greatly improve and
protect the environment. The product hydrogen with a purity of
99.9-99.999% can be obtained by the mature pressure swing
adsorption technology.
Features
Process Description
The coke oven gas is obtained by removing tar, denaphthalene,
atmospheric pressure desulfurization, and fine desulfurization to
obtain fine gas. The purified gas can be obtained by compression,
pretreatment, pressure swing adsorption, and deoxidation drying to
obtain high purity hydrogen.
The technology comprises three main units and combinations, namely
TSA, PSA, deoxidation drying, wherein the process principle of PSA
is the same as the prior art.
TSA is a temperature-temperature adsorption technology. According
to the TSA performance curve, the multi-component mixture gas is
separated under certain working pressure, normal temperature
adsorption and high-temperature analysis to make the target product
gas and impurities.
In the deoxidation drying technology, under the action of a
catalyst, oxygen, and hydrogen in the crude hydrogen react to form
water to remove oxygen in the crude hydrogen; the generated water
is then cooled by a cooler and removed by a TSA drying system to
achieve the purpose of purifying hydrogen.
Performance
- COG Capacity: 1,000~100,000 Nm3/h
- Naphthalene content in Product: ≤ 20 mg/Nm3
- Tar content in Product: ≤ 8 mg/Nm3
- Sulfur content in Product: ≤ 10 mg/Nm3
- Hydrogen Purity: 98%~99.999% (v/v)
- Pressure: 0.5 ~3 .0 MPa(G)
- Hydrogen Capacity: 500~50,000 Nm3/h
