Wastewater zero discharge method in manufacturing process of island superfine fiber synthetic leather

Abstract

The invention discloses a wastewater zero discharge method in a manufacturing process of island superfine fiber synthetic leather. The method comprises the following steps: merging an alkali-minimization wastewater and a dyeing wastewater into a wastewater regulating reservoir, or merging the alkali-minimization wastewater into the wastewater regulating reservoir; adding acid to the wastewater regulating reservoir to form a solid matter; transferring the wastewater after the solid matter is cleaned into a turntable solid-liquid separator; adding a polyacrylamide flocculant and a polyaluminium chloride flocculant; evaporating the solid matter and the sludge obtained by solid-liquid separation in an evaporation tank, and simultaneously collecting distilled water in a condensation manner; transferring the wastewater from solid-liquid separation into a multi-effect evaporator to evaporate, and collecting distilled water by condensation; merging the residual residue in the evaporator into a sludge concentrating tank to continue to process. The production of the island superfine fiber synthetic leather is taken as a basic system, and is combined with collection, treatment and comprehensive utilization technologies of the production wastewater and the solid matter, the technical bottlenecks of wastewater zero discharge in the production process is solved, and the island superfine fiber synthetic leather which is friendly to environment and high in quality can be produced.

Description

technical field

[0001] The invention relates to waste water and waste treatment and comprehensive utilization technology in the production process of superfine fiber synthetic leather, in particular to a method for zero discharge of waste water in the production process of fixed island type superfine fiber synthetic leather. Background technique

[0002] China is a big producer of synthetic leather, its total production ranks first in the world, and its annual output accounts for more than 56% of the world's total output. According to the information from the National Bureau of Statistics, there are currently more than 4,000 processing enterprises engaged in artificial leather, synthetic leather, and microfiber synthetic leather, including post-processing enterprises. According to the survey and statistics of China Artificial Leather and Synthetic Leather Network, in 2010, there were 1575 PU synthetic leather production lines nationwide, and more than 30 superfine fiber synt...

Examples

Embodiment 1

[0054] For a Dingdao-type microfiber synthetic leather factory with an output of 75,000 m / day, the production of alkali-reduced sewage is about 1,500 tons / day, and 360,000 tons of distilled water can be recycled every year. The cost of distilled water manufacturing is calculated at 5 yuan / ton, only For distilled water, the annual cost savings is 1.8 million yuan. The waste water treatment cost of the present invention is about 0.56 yuan per meter of product, and the sewage treatment cost of the traditional technology is about 0.8 yuan per meter of product, and the invention reduces the cost of pollution. This embodiment takes the treatment of alkali weight reduction wastewater as an example to introduce a specific production method.

[0055] (1) Wastewater collection:

[0056] Build an alkali reduction wastewater collection pool and a wastewater adjustment pool; collect 1,500 tons of alkali reduction wastewater generated every day in the alkali reduction wastewater collection...

Embodiment 2

[0067] For a Dingdao type microfiber synthetic leather factory with an output of 75,000 m / day, the production of alkali-reduced sewage is about 1,500 tons / day, dyeing and finishing wastewater is 2,000 tons / day, and 840,000 tons of distilled water can be recovered each year. The production cost of distilled water Calculated at 5 yuan / ton, only distilled water is used, and the annual cost savings is 4.2 million yuan. The waste water treatment cost of the present invention is about 1.3 yuan per meter of product, and the sewage treatment cost of the traditional technology is about 1.5 yuan per meter of product, and the invention reduces the pollution cost. This embodiment introduces specific production methods by taking the treatment of alkali reduction wastewater and dyeing and finishing wastewater as examples.

[0068] (1) Wastewater collection:

[0069] Construct the alkali reduction waste water collection pool and the dyeing and finishing waste water collection pool respectiv...

technical field

[0001] The invention relates to waste water and waste treatment and comprehensive utilization technology in the production process of superfine fiber synthetic leather, in particular to a method for zero discharge of waste water in the production process of fixed island type superfine fiber synthetic leather. Background technique

[0002] China is a big producer of synthetic leather, its total production ranks first in the world, and its annual output accounts for more than 56% of the world's total output. According to the information from the National Bureau of Statistics, there are currently more than 4,000 processing enterprises engaged in artificial leather, synthetic leather, and microfiber synthetic leather, including post-processing enterprises. According to the survey and statistics of China Artificial Leather and Synthetic Leather Network, in 2010, there were 1575 PU synthetic leather production lines nationwide, and more than 30 superfine fiber synt...

Examples

Embodiment 1

[0054] For a Dingdao-type microfiber synthetic leather factory with an output of 75,000 m / day, the production of alkali-reduced sewage is about 1,500 tons / day, and 360,000 tons of distilled water can be recycled every year. The cost of distilled water manufacturing is calculated at 5 yuan / ton, only For distilled water, the annual cost savings is 1.8 million yuan. The waste water treatment cost of the present invention is about 0.56 yuan per meter of product, and the sewage treatment cost of the traditional technology is about 0.8 yuan per meter of product, and the invention reduces the cost of pollution. This embodiment takes the treatment of alkali weight reduction wastewater as an example to introduce a specific production method.

[0055] (1) Wastewater collection:

[0056] Build an alkali reduction wastewater collection pool and a wastewater adjustment pool; collect 1,500 tons of alkali reduction wastewater generated every day in the alkali reduction wastewater collection...

Embodiment 2

[0067] For a Dingdao type microfiber synthetic leather factory with an output of 75,000 m / day, the production of alkali-reduced sewage is about 1,500 tons / day, dyeing and finishing wastewater is 2,000 tons / day, and 840,000 tons of distilled water can be recovered each year. The production cost of distilled water Calculated at 5 yuan / ton, only distilled water is used, and the annual cost savings is 4.2 million yuan. The waste water treatment cost of the present invention is about 1.3 yuan per meter of product, and the sewage treatment cost of the traditional technology is about 1.5 yuan per meter of product, and the invention reduces the pollution cost. This embodiment introduces specific production methods by taking the treatment of alkali reduction wastewater and dyeing and finishing wastewater as examples.

[0068] (1) Wastewater collection:

[0069] Construct the alkali reduction waste water collection pool and the dyeing and finishing waste water collection pool respectiv...

Images