Method for utilizing refinery tail gas and coke oven gas efficiently and rationally

Abstract

The invention discloses a method for utilizing refinery tail gas and coke oven gas efficiently and rationally. The refinery tail gas and/or the coke oven gas are used as raw material gas to manufacture hydrogen by purification treatment and sequential separation working procedures to obtain hydrogen products on one hand, and on the other hand, by-product gases of the sequential separation working procedures enter a mixed device, and calorific value is mixed and allocated by LNG or LPG gas so as to obtain a 12 T-generation natural gas product which is conveyed to a natural gas pipe net. The method enables the refinery tail gas and the coke oven gas to exert the maximum efficiency so as to maximize the value in use on the national energy source level and enables enterprises to obtain considerable economic benefits simultaneously; in addition, by adopting the most economical technology, the invention realizes that each component in the refinery tail gas/the coke oven gas can be made the best use.

Description

technical field [0001] The invention relates to the technical field of utilization of industrial tail gas such as refinery tail gas and coke oven gas. Background technique [0002] Refinery tail gas is a general term for mixed gases containing hydrogen, methane, ethane, propane, olefins and light hydrocarbons produced during crude oil processing in refineries. Generally speaking, the total amount of refinery tail gas accounts for about 5% of the crude oil processing volume, and most of the components are hydrogen. After extraction, it can be used as raw material for hydrogenation or supplied to other users, with high added value. Other components, such as ethane, can be used as raw materials for cracking to ethylene and chlorination to produce ethyl chloride; LPG, C 5 Light oil can be used as chemical raw material or energy for vehicles and households. It can be seen that through technical mining, other components after extracting these high value-added substances still ha...

AI Technical Summary

Problems solved by technology

This will undoubtedly increase the cost of refining

[0023] 2) The load balance problem of refinery tail gas is very difficult

[0024] 3) At present, the common problem in domestic refineries using refinery tail gas is: the comprehensive utilization of refinery tail gas has not been considered from an overall perspective

Because the production equipment of major oil refineries has been continuously expanding and changing, and the refining process technology is also constantly improving, it is difficult for the original process to fully adapt to the new production mode, and the problem of unoptimized refinery tail gas utilization process is common and widespread. Inevitably, this shows that the recovery cost is high and the economy is not obvious, which leads to the suppression of the enthusiasm of refiners to recycle refinery tail gas

[0025] 4) It is only limited to a single refinery to consider the utilization of refinery tail gas, and it is impossible to truly minimize the recovery cost of useful components of refinery tail gas and achieve the goal of maximizing the utilization value

For example, from the point of view of the refinery alone, the separation of a certain component in the refinery tail gas is a necessary way to utilize the refinery tail gas, but there are problems that the separation cost is too high and the economic efficiency of recovery is not obvious, but it has to be done

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