Water-saving and energy-saving cashmere dye vat and dyeing process

Abstract

The invention discloses a water-saving and energy-saving cashmere dye vat and dyeing process. The dye vat comprises a dye vat slot and a hanging basket, wherein a central tube is arranged in the middle of the hanging basket; cashmere placement areas are arranged at the two sides of the center tube; external dye liquor circulation holes and inner dye liquor circulation holes are formed in the two sides of each of the hanging basket and the center tube; the distribution density of the inner dye liquor circulation holes is larger than that of the external dye liquor circulation holes; the total distribution area of the inner dye liquor circulation holes is less than that of the external dye liquor circulation holes; a hollow part adopting a V-shaped structure is arranged in the center tube. The water-saving and energy-saving cashmere dyeing process comprises the following steps: filling the center tube with water; enabling dye liquor to penetrate through a cashmere fiber layer through the inner dye liquor circulation holes; allowing the dye liquor to flow out of the cashmere fiber layer through the external dye liquor circulation holes after soakage of the cashmere fiber layer. Through adoption of the cashmere dye vat and dyeing process, water consumption and energy consumption in the dyeing process are reduced; the penetrating power of the dye liquor penetrating through the cashmere fiber layer is improved, and the dye uptake and the dye uniformity of a dyeing color are improved.

Description

technical field [0001] The invention relates to a cashmere water-saving and energy-saving dyeing vat and a dyeing process, and relates to the technical field of dyeing in the cashmere textile industry. Background technique [0002] Cashmere is a rare textile fiber raw material, known as "soft gold" and "diamond fiber". It occupies the high-end luxury goods market of textile consumption with its unique characteristics of softness, softness, slipperiness, waxiness and lightness. In order to make cashmere have more colors, the original cashmere needs to be dyed. However, the dyeing of the cashmere textile industry has encountered a technical "bottleneck" problem that restricts the development of the industry: First, the high water and energy consumption of cashmere dyeing , environmental protection pressure is high, and cashmere dyeing is one of the links with high water and energy consumption in cashmere textile processing; second, cashmere fiber variation leads to poor level ...

AI Technical Summary

Problems solved by technology

[0002] Cashmere is a rare textile fiber raw material, known as "soft gold" and "diamond fiber". It occupies the high-end luxury goods market of textile consumption with its unique characteristics of softness, softness, slipperiness, waxiness and lightness. In order to make cashmere have more colors, the original cashmere needs to be dyed. However, the dyeing of the cashmere textile industry has encountered a technical "bottleneck" problem that restricts the development of the industry: First, the high water and energy consumption of cashmere dyeing , environmental protection pressure is high, and cashmere dyeing is one of the links with high water and energy consumption in cashmere textile processing; second, cashmere fiber variation leads to poor level dyeing of dyeing. The policy of prohibiting grazing and returning grazing to grassland has been put on the height of the national environmental protection strategy. Cashmere goats have changed from the traditional "breeding" to "captive" mode. With the improvement of cashmere goats, the quality of cashmere has changed. The fiber diameter becomes thicker, the two-type wool increases, and the proportion of two-fine wool increases; the deterioration of cashmere quality brings processing difficulties to the textile dyeing process, resulting in inconsistent colors at the root and tip of the dyeing, prone to dyeing color spots, and affecting product quality

[0003] like figure 1 Shown is a schematic diagram of the longitudinal section structure of the cashmere dyeing tank body in the prior art, the cashmere dyeing tank body includes a cylindrical dyeing tank tank 2, and a cylindrical hanging basket 1 arranged in the dyeing tank tank 2; the hanging basket 1 A cylindrical central tube 3 is arranged in the middle; a cashmere storage area 4 is provided around the central tube 3; an external dyeing solution circulation hole 6 is provided around the hanging basket 1 and on the hanging basket around the cashmere storage area 4 Around the central tube 3, and inside the cashmere placement area 4, an inner dye solution circulation hole 5 is provided; the distribution density and the total area of ​​the inner dye solution circulation hole 5 and the outer dye solution circulation hole 6 are the same; A kind of cashmere dyeing cylinder dyeing, the liquor ratio in the cashmere loose fiber dyeing process is 15:1~20:1, and the water consumption per ton of cashmere in the dyeing process (including pretreatment and posttreatment process) is 120~ 150 tons, plus the bleaching and decolorization water consumption and non-productive water consumption of some products, the comprehensive water consumption per ton of cashmere is about 150-200 tons, the comprehensive power consumption is about 500 kWh / ton, and the comprehensive steam consumption is 5 tons of steam per ton; this not only makes the cost of water and energy consumption high for dyeing processing, but also causes high cost of dyeing sewage treatment, and also brings pressure on sewage treatment and environmental protection. The high processing cost virtually reduces cashmere products. Increased environmental protection pressure; seriously mutated cashmere dyeing color difference is usually 2-3 grades, and the color fastness is 2-3 grades, which affects the high-end market of high-quality and high-value-added products.

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