Normal pressure non-phenol method for fixed-bed gas producer

Abstract

The invention belongs to the coal gas generation filed, in particular to a normal pressure non-phenol method of the fixed bed coal gas generator; the technical proposal includes that the method includes the steps of dry distillation segment process and gasification segment process in the coal gas generator; the raw coal is dried before the raw coal is fed into the coal gas generator; 95 % water contained in the raw coal is removed through high temperature by the process method before the raw coal is fed into the coal gas generator; finally, the water content of the generated coal gas is lowered greatly; thereby, the generation quantity of the phenol is reduced obviously.

Description

technical field [0001] The invention belongs to the field of gas generation, and in particular relates to a normal-pressure phenol-free method for a fixed-bed gas generator. Background technique [0002] The process method of the gasifier commonly used at present is two steps: the process step of the dry distillation section and the process step of the gasification section in the gasifier. The details of this step are when the raw coal containing a large amount of After the coal burner is added, it is in reverse contact with a part of the hot coal gas produced in the dry distillation section and gasification section, and loses moisture and volatile matter after being heated. After the volatile matter is removed in the dry distillation section, the coal material becomes low-temperature dry distillation semi-coke and enters the gasification section. They are in countercurrent contact with steam and air in the gasification section, and all the carbon is almost completely gasifi...

AI Technical Summary

Problems solved by technology

The disadvantage of this process method is that the generated gas has a high moisture content, and the moisture in the gas comes from the low-temperature dry distillation pyrolysis water of the fuel, the moisture in the fuel and the undecomposed part of the steam

Due to the cooling effect in the post-treatment process, the phenol produced in the process dissolves in water to form phenol water, which increases the difficulty of gas treatment. The subsequent purification and cooling process is cumbersome, the production cost is high, and it is not good for the environment. Large, 30% of the station area is a cooling pool, the water content in the gas is high, and the calorific value of the gas is low

Images