Textile printing and dyeing is a key development support project in my country. However, in the textile printing and dyeing process, due to the large amount of auxiliaries required for raw materials and the immature process, it is easy to cause foam, which will bring great difficulties to water treatment. Experienced manufacturers Will control foam by adding sewage treatment defoamer to prevent foam from being produced. The editor briefly analyzes the sewage foam treatment process of the textile printing and dyeing plant.
(Picture: Sewage foam scene of textile printing and dyeing)
The following water treatment methods are generally used in textile printing and dyeing wastewater:
1. The fence method. Used to remove floating and suspended matter such as yarn ends and cloth pieces in wastewater. There are mainly grilles, grids, screens, etc.
2. Regulating pool. Due to the large changes in the quality and quantity of textile printing and dyeing wastewater, it is necessary to set up a regulating tank. Generally, when the wastewater volume is 5000t/d, the retention time of the regulating tank is 4h; when the wastewater volume is 2000t/d, the retention time of the regulating tank is 5h-6h; the volume of wastewater is less than 1000t /d, the residence time of the conditioning tank is 7h-8h.
3. Sedimentation tank. The suspended particles of printing and dyeing wastewater are small, so it is not suitable for direct sedimentation treatment without other (such as chemical) pretreatment. The sedimentation tank is divided into advection, vertical and radial flow, of which the former is most used.
4. Filtration method. The filtration used in printing and dyeing wastewater is mostly fast filter, that is, under the action of gravity, water passes through the filter at a speed of 6m/h to 12m/h to complete the filtration process.
The impact of improper treatment of sewage foam
There are many foams that the Environmental Protection Bureau does not meet the standards and cannot be discharged, which slows down the process.
Too much foam overflows from the surface, causing serious pollution of the external environment.
There is too much foam and the appearance is too ugly.
There is too much foam during aeration or oxygen supply in biological water treatment, which affects the progress or overflow of water treatment, and affects the activated mud and bacteria.
Too many bubbles in the sewage will affect the surrounding environment and cause different degrees of pollution
(Picture: Sewage foam of textile printing and dyeing)
Nanhui specializes in researching and developing defoamers for textile sewage foam
The Nanhui defoamer manufacturer has developed a defoamer for textile wastewater treatment based on the characteristics of easy foaming in textile printing and dyeing wastewater, which not only defoams fast, but also has a good foam suppression effect. The textile sewage defoamer developed by Nanhui is developed for the defoaming of sewage treatment, so the defoaming is more targeted. Has the following advantages:
1. The formula has a high concentration and a relatively small additive amount. It is more durable than ordinary defoamers, can be released for use, and can save defoaming costs.
2. The R&D and R&D services of large factories are relatively complete, which can be targeted at the use environment for research and development, targeted at solving problems, and the pre-sales and after-sales services are relatively perfect, and the defoaming agent is more assured.
3. The defoamer has stable chemical properties and can withstand acid-base and high-temperature environments. Even in the alkaline environment of textile wastewater, it can still maintain continuous defoaming and foam suppression. There is no need to worry that the change of PH will affect the defoamer to exert its due effect.
4. One-to-one technical support, 24 hours online to provide you with solutions to bubble problems;
5. Provide free samples
（free sample of Nanhui defoamer）
Nanhui is a manufacturer with years of application experience. It has far more defoaming technology than other antifoaming agents in the market. From the above cases, we prove the strength of our Nanhui defoamer. We have a group of excellent defoaming engineers, and an independent laboratory that facilitates defoaming experiments with foams that are difficult for customers to solve. If you want to know more about defoamer products, you can call our hotline: +86 13428601010.
This article is from the manufacturer of Nanhui defoamer (http://www.nhdefoamer.com/), please indicate the source if you need to reprint.
