The invention relates to a technology for producing cooled
coal gas with no discharging of phenolic water, belonging to the technical field of
coal gas production and providing a technology for producing cooled
coal gas with no discharging of phenolic water which has no
contamination of the environment and can save energy and investment. The process flow of a
single stage coal gas producer is as follows: the hot
coal gas enters a
ceramic filter deduster from the outlet of the
coal gas producer; then enters an indirect cooling device to carry out heat exchange with phenolic water and the temperature drops to 40-50 DEG C; the cooled coal gas enters an electro detarrer to remove
tar oil and small
dust particles; the purified coal gas is supplied to users through a coal gas compresser; the phenolic water is heated into phenolic vapor and is used as gasification agent after being introduced into the bottom of the coal gas producer. The process flow of a two-stage coal gas producer is as follows: the lower-stage gas emerges out of the coal gas producer and passes through the
ceramic filter deduster and the indirect cooling device; the upper-stage coal gas emerges, enters a rough electrical
coke arrester and a refined electrical
coke arrester, and is converged with the lower-stage coal gas to obtain purified coal gas, thus optimizing the dedusting and heat exchanging processes of hot coal gas, improving dedusting effect and hot exchange efficiency, being capable of saving investment of devices, protecting environmental and saving energy.