KR930000658A - Manufacturing method of high calorific city gas - Google Patents

Abstract

In the process of producing high calorie SNG type city gas from hydrocarbonic crude gas, e.g., butane, propane, naphtha etc., an elementary feed gas is produced by using hydrodesulfurization as a first step, and then secondly further methanizing the product in a column. The hydrodesulfurization uses a nimox catalyst and a zinc oxide adsorbent. The desulfurized feed gas is further methanized on an alumina group carrier supported by nickel to obtain methane-rich gas, i.e. the elementary feed gas in a combined use type column. The necessary hydrogen to be fed into the hydrodesulfurization is obtained from a methanol/water mixture. This hydrogenizing reaction tube is combined within the same column above. Inorganic salt is used as a heat transfer medium heat-sourced in an external furnace and the heat transfer medium temperature branched into two system-flows are controlled by a three-way flow rate control valve simultaneously. The above reaction temperature is about 320<o>C.

Description

Manufacturing method of high calorific city gas

Since this is an open matter, no full text was included.

1 is a process chart of the production method of SNG cattle source gas of the present invention.

2 is a diagram showing an outline of a deoiling tower structure.

3 is a diagram showing an outline of a reaction column structure.

Claims (2)

Hydrocarbons such as butane, propane and naphtha are removed by hydrodesulfurization to remove sulfur and steam reforming (methanation reaction) to generate small raw gas, followed by decarbonization, dehydration and purification, followed by calorific adjustment with hydrocarbon gas. In the manufacturing process of high calorific city gas (Daejeon Natural Gas), 1-type heat exchange type U-shaped flow path having a reaction tube filled with Nimox catalyst and zinc oxide, while hydrodesulfurization is carried out. Using a desulfurization tower of), the hydrogen mixture is reacted with hydrogen and an inert sulfur compound in the raw material in the Nimox layer of the royal road while maintaining the temperature of about 350 ° C by the fruit circulation on the fuselage side. Then, sulfur content is removed from the raw material by ZnS in the ZnO layer of the double path, and ② a material of steam is filled with a methanation catalyst having nickel supported on an alumina carrier. The reaction of desulfurized raw materials and water vapor in one step through a catalyst was carried out using a heat exchange cell tube type reaction column having a reaction tube while maintaining a temperature of about 320 ° C. by the fruit circulation on the body side. Under the conditions, the reaction mixture is heated to generate a rich methane-containing gas directly. ③ To obtain hydrogen desulfurization hydrogen, a tube which is part of the reaction column of ② is charged with a hydrogenation catalyst and used as a separate flow path as a reaction tube. Isothermally reacted with a catalyst at the same temperature under specific reaction conditions in one step to directly generate a rich hydrogen-containing gas, ④ heat to maintain the optimum reaction temperature for each of hydrodesulfurization and steam reforming. It circulates using an inorganic salt heating medium with a high moving speed, absorbs heat of exothermic reaction, supplies heat of endothermic reaction, Method of producing a high-calorie city gas, characterized in that to carry the fruit circles of the two systems can be adjusted to. A method for producing a high calorific city gas according to claim 1, wherein a continuous flow PSA method is used to decarbonize and dehydrate the small raw material gas. ※ Note: The disclosure is based on the initial application.