Cold gas production technique for phenol-containing water self treatment

Abstract

The invention provides a phenol water self treatment cold coal gas production process, wherein the exhausted coal gas from a coal gas generating furnace is subjected to dust removal through a cyclone separator, cooled down by an air cooler, enters an indirect cooler for heat exchange and cooling, enters an electric light-drip catcher and is outputted. The production process is characterized in that a phenol water evaporator is additionally arranged between the cyclone separator and the air cooler, and the sewage containing phenol and oil, which is generated in the condensate in the indirect cooler and the electric light-drip catcher by the coal gas, is subjected to oil-water separation, the separated phenol water enters the phenol water evaporator, the exhausted coal gas enters the cyclone separator and then enters the indirect cooler through the phenol water evaporator, the phenol water is evaporated in the phenol water evaporator by utilizing the waste heat of the coal gas to generate the phenol steam, and the phenol steam is used as a gasifying agent for a gas furnace. In the invention, while the sewage containing phenol is treated, the waste heat of the coal gas is further utilized, thereby avoiding pollution and saving energy.

Description

technical field [0001] The invention relates to a process for producing cold gas at a gas station, in particular to a process for processing and utilizing the phenol water by adding a phenol water evaporator and using the waste heat of the gas in the cold gas station. Background technique [0002] Among the domestic gasifiers, the fixed bed gasifier is the most operated one. At present, the coal gas produced by the gas generator mainly adopts the cold gas station process. The gas (temperature is about 550°C) discharged from the gas generator, after being dedusted by the cyclone separator, is cooled by the air cooler and enters the intercooler, and is cooled to 30-40 ℃, after being lightly treated by electric capture, it is sent to the drop catcher by a pressurized fan, and then to the gas workshop. The hot gas from the gas generator has a lot of sensible heat, which is cooled by an air cooler. This part of the heat is released into the atmosphere for nothing, and a large am...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a cold gas production process of self-treatment of phenol water, which makes full use of the heat of gas released from the gas generator, solves the problem of difficult treatment of phenol-containing sewage generated during the condensation process of gas, and makes phenol-containing sewage Evaporation of sewage into phenol-containing saturated steam is used as a gasification agent in the gasifier, which not only saves energy but also avoids pollution

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