Improved tar dehydration method

Abstract

The invention discloses an improved tar dehydration method. The method comprises the following steps: tar separated from a vapor-liquid separator and ammonia water stand in a mechanical ammonia waterclarification tank, and tar residues and the ammonia water are preliminarily separated; the tar at the lower part of the mechanical ammonia water clarification tank flows into a tar clarification tank, and further stands, and the ammonia water and tar residues are removed; the tar at the lower part of the tar clarification tank is sent into a tar centrifuge in order to further remove water and tarresidues in the tar; the obtained tar is sent into a tar tank, and is continuously heated, the temperature of the tar tank in the early stage is ensured to be 88-92 DEG C, steam is increased when theliquid level of the tar tank reaches 10 m and no tar is fed to ensure that the temperature in the tar tank is 100 DEG C, the tar is heated for 24 h and then stands for 48 h, and a top liquid discharging valve is turned on to achieve liquid discharging and dehydration; the tar tank is heated to 100 DEG C after the dehydration, then is continuously heated for 24 h, and then stands for 48 h, and liquid discharging and dehydration are carried out again; and the tar is sampled and chemically analyzed after above two-stage heating, and is outwards distributed after moisture qualification.

Description

technical field [0001] The present invention relates to an improved tar dehydration process. Background technique [0002] The raw coal gas from the coke oven at about 82°C in the coking plant flows into the gas-liquid separator along with the tar and ammonia water along the gas suction pipeline, and the tar and ammonia water separated from the lower part of the gas-liquid separator enter the mechanized ammonia water clarification tank. The tar in the lower part of the mechanized ammonia clarification tank flows into the tar clarification tank by static pressure to further remove the ammonia water and tar residue, and the tar in the lower part of the tar clarification tank is sent to the tar centrifuge with a tar delivery pump to further remove the moisture and tar residue in the tar , the tar flows into the tar intermediate tank, and is transported to the tar storage tank by the tar intermediate pump. Then pump the tar to the tar tank of the oil depot. When the tar centri...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an improved tar dehydration method, which can solve the problem that tar moisture is difficult to remove, and can solve the phenomenon of tar and water miscibility in the case of long coking