A method for recycling sheep shearing dyeing board waste liquid

Abstract

The invention relates to a shorn sheepskin plate-dyeing waste liquor recycling method. The shorn sheepskin plate-dyeing waste liquor recycling method comprises the following steps that (1) sheepskin is placed into a rotary drum, a bath solution is added into the rotary drum according to the liquor ratio of 1:12, the temperature is maintained at 40 DEG C, a mixture of a cleaning agent, namely an anionic surfactant, and a lipid tanning agent is added into the rotary drum, a penetrant, namely a phenolic condensation compound, is added into the rotary drum after the rotary drum rotates for a period of time, and dye used for plate dyeing is added after the rotary drum rotates for a period of time; (2) water at the temperature of 40 DEG C is added into the rotary drum according to the liquor ratio of 1:12 after the rotary drum rotates for a period of time, dye used for plate dyeing is added into the rotary drum, an aluminum-containing retanning agent is added after the rotary drum rotates for a period of time, and an aluminum-containing tanning agent is added after the rotary drum rotates for a period of time; (3) the pH of waste liquor generated in step (1) is regulated to 9 with ammonium hydroxide, and then the waste liquor is returned to be use as a solution in step (1); (4) water at the temperature of 65 DEG C is added into the rotary drum according to the liquor ratio of 1:12, dye used for fur dyeing is added into the rotary drum, and a deepening agent, namely alkyl phosphate, and a leveling agent, namely anionic surfactant slat, are added into the rotary drum after the rotary drum rotates for a period of time; and (5) aftertreatment is conducted. By adoption of the shorn sheepskin plate-dyeing waste liquor recycling method, the problem of severe dye waste is solved, andthe cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of tanning, and in particular relates to a method for recycling waste liquid of sheep shearing dyeing boards. Background technique [0002] The normal dyeing process of black uppers is: dyeing board - retanning - dyeing wool. The biggest problem in the traditional process is that the dyeing process is complicated, the water consumption is large, and the dyeing wastewater is not easy to treat; and the utilization rate of the dye on the dyeing board is low, and a large amount of dye remains in the bath solution, which leads to the increase of the chroma of the wastewater, and after the dyeing, the finished product is black. The degree is not high. Contents of the invention [0003] The purpose of the present invention is to provide a method for recycling the waste liquid of sheep shearling dyeing boards, so as to solve the above problems. The technical scheme adopted in the present invention is: [0004] ...

AI Technical Summary

Problems solved by technology

The biggest problem in the traditional process is that the dyeing process is complicated, the water consumption is large, and the dyeing wastewater is not easy to treat; and the utilization rate of the dye on the dyeing board is low, and a large amount of dye remains in the bath solution, which leads to the increase of the chroma of the wastewater, and after the dyeing, the finished product is black. degree is not high