Technique for purifying crude gas from gas making stove for coal dry distillation

Abstract

A process for cleaning the crude gas coming from the coal-pyrogenous furnace includes such steps as gas-liquid separation, cooling, capturing tar oil, removing benzene and naphthelene, desulfuring, conveying gas, and saturating to remove ammonia and obtain clean gas.

Description

technical field [0001] The invention belongs to the field of gas purification, and is a method for processing crude gas from a coal dry distillation gas-making furnace through a gas purification device, recovering chemical products such as tar, benzene, naphthalene, ammonia, sulfur, etc., and sending the clean gas to users process method. Background technique [0002] Usually, the process of gas purification from coal dry distillation gas furnace is as follows: [0003] Crude gas→gas-liquid separation→primary cooling→gas transportation→tar capture→precooling-primary removal of naphthalene→desulfurization→deammonization→final cooling and washing of naphthalene→debenzene→clean gas; in order to meet the needs of city gas, etc., deep purification of clean gas The process of the system is: clean gas→pressurized transportation→cooling→deep naphthalene removal→deep desulfurization→dehumidification→city gas. [0004] The crude gas of the traditional process is generally 23°C to 25...

AI Technical Summary

Problems solved by technology

Combined with the long-term trend of gradually rising prices of petrochemical products, the use of light diesel oil to wash naphthalene has disadvantages that cannot be ignored

In addition, the debenzene distillation tower of the current crude gas debenzene process usually adopts a plate tower. Due to the low separation efficiency of the plate debenzene tower and the relatively large plate resistance, the effect of the naphthalene removal of the debenzene tower is poor.