METHOD FOR ENRICHING NATURAL GAS WITH HYDROGEN AND INSTALLATION FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC C01B3/50 C01B3/26 B01J19/08 

FIELD: power engineering.

SUBSTANCE: method for the production of hydrogen-containing gases used in thermal power engineering using natural gas (NG) as a smokeless fuel and released carbon in the chemical and metallurgical industries. A method for enriching natural gas with hydrogen is disclosed. The method includes pyrolysis of natural gas with separation into hydrogen and carbon components, gas quenching with heat recovery. The carbon component of the gas is precipitated and removed, and the hydrogen component is mixed with the undecomposed part of natural gas. In this case, the incoming natural gas flow is divided into two parts in a given ratio. One part is subjected to pyrolysis at a temperature of 1300-1500°C for 0.01-0.05 s by mixing it with the combustion products of a methane-hydrogen mixture with an oxidizer in a stoichiometric ratio using a stream feed at a temperature of 1600°C into the natural gas flow. The flow is heated by convective heat exchange and heat radiation from the wall of the elongated cavity of the crucible, heated by combustion of the methane-hydrogen mixture. The turbulence of the flow of the gas mixture intensifies the splitting of natural gas into hydrogen and carbon components. Coalescence of carbon from the carbon component is carried out. Then the gases are quenched by injecting cold water with coagulation of carbon into a flocculent sediment, which, under the influence of gravitational forces, settles in the soot collection zone of the reactor, from which heat is removed with steam and heated water. The mixture of the hydrogen component with the undecomposed residue of natural gas forms a hydrogen-containing mixture, which is further cooled by mixing with another part of the natural gas, producing hydrogen-enriched natural gas, which is then purified from suspended impurities and sent to its intended destination. A plant for enriching natural gas with hydrogen is also disclosed.

EFFECT: improving the environmental friendliness of natural gas combustion by reducing the concentration of carbon dioxide CO₂ in the flue gases of boilers and industrial furnaces operating on natural gas, and simplifying the design of a device for enriching natural gas with hydrogen.

6 cl, 1 dwg