Method of treating weave printing and dyeing wastewater by slurries production technology

Abstract

This invention discloses a method for processing spinning, printing and dyeing waste water by a coal-water slurry production technology including a step of filtering spinning, printing and dyeing waste water, a step of determining the mixture ratio among desulfurizer, dispersant, clean water and waste water, a step of mixing slurrying, a step of stabilizing the slurry and a step of aging and storing coal-water slurries.

Description

technical field

[0001] The invention relates to a method for treating textile printing and dyeing wastewater by utilizing a coal-water slurry production process. Background technique

[0002] The textile industry is a traditional pillar industry in my country, including five parts: textile, printing and dyeing, chemical fiber, clothing and textile special equipment manufacturing. With the rapid development of the national economy, my country's printing and dyeing industry has also entered a period of rapid development. The level of equipment and technology has been significantly improved, and the production process and equipment have been continuously updated. Printing and dyeing enterprises, especially private printing and dyeing enterprises, have developed very rapidly. At the same time, the total wastewater discharge of the textile printing and dyeing industry ranks fifth in the national industrial industry. It accounts for about 7% of the nation...

Examples

Embodiment Construction

[0018] The method that present embodiment utilizes coal-water slurry production process to process textile printing and dyeing wastewater comprises the following steps:

[0019] (a) Filtration step: filter textile printing and dyeing wastewater to remove impurities with larger particle sizes, and the filtered residue can be disposed of by burning, landfilling, etc.;

[0020] (b) Proportioning step: take a sample from the filtered textile printing and dyeing wastewater, mix it with clear water in a ratio of 1:1, then add lignosulfonate as a dispersant, and then gradually add lime water (i.e. Ca(OH) 2 Solution) as a desulfurizing agent until the pH value of the sample is equal to 8, the pH range after the proportioning can be between 8 and 10, that is, it only needs to be weakly alkaline, so that the effect of removing sulfur in the coal can be achieved. In this step, the ratio relationship among desulfurizer, dispersant, clear water, and textile printing and dyeing wastewater c...

technical field

[0001] The invention relates to a method for treating textile printing and dyeing wastewater by utilizing a coal-water slurry production process. Background technique

[0002] The textile industry is a traditional pillar industry in my country, including five parts: textile, printing and dyeing, chemical fiber, clothing and textile special equipment manufacturing. With the rapid development of the national economy, my country's printing and dyeing industry has also entered a period of rapid development. The level of equipment and technology has been significantly improved, and the production process and equipment have been continuously updated. Printing and dyeing enterprises, especially private printing and dyeing enterprises, have developed very rapidly. At the same time, the total wastewater discharge of the textile printing and dyeing industry ranks fifth in the national industrial industry. It accounts for about 7% of the nation...

Examples

Embodiment Construction

[0018] The method that present embodiment utilizes coal-water slurry production process to process textile printing and dyeing wastewater comprises the following steps:

[0019] (a) Filtration step: filter textile printing and dyeing wastewater to remove impurities with larger particle sizes, and the filtered residue can be disposed of by burning, landfilling, etc.;

[0020] (b) Proportioning step: take a sample from the filtered textile printing and dyeing wastewater, mix it with clear water in a ratio of 1:1, then add lignosulfonate as a dispersant, and then gradually add lime water (i.e. Ca(OH) 2 Solution) as a desulfurizing agent until the pH value of the sample is equal to 8, the pH range after the proportioning can be between 8 and 10, that is, it only needs to be weakly alkaline, so that the effect of removing sulfur in the coal can be achieved. In this step, the ratio relationship among desulfurizer, dispersant, clear water, and textile printing and dyeing wastewater c...

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