Wuxi Highness Technology Co., Ltd

 

First, flocculant

 

1, starch derivative flocculant

 

In recent years, starch flocculants in the printing and dyeing wastewater is also widely used. Using ammonium persulfate as the initiator, the water chestnut powder and acrylonitrile graft copolymerization, the modified starch with coagulant basic aluminum chloride treatment of printing and dyeing wastewater, turbidity removal rate can reach more than 70%. Based on the synthesis of cationic starch flocculant by starch and acrylamide copolymerization, the synthesis and properties of cationic flocculant CSGM modified by starch-acrylamide graft copolymer were studied. The flocculant was used to treat wool Printing and dyeing wastewater has achieved good results. The removal rate of COD was 68.8% when the dosage was 120mg / L, and the removal rate of COD was 68.8% when the dosage was 120mg / L, and the removal rate of COD was 68.8% when the dosage was 120mg / L, Chroma removal rate of 92%. The results showed that the removal rate of suspended solids, COD and chroma was higher and the amount of sludge was less than that of the other. The results showed that there were many kinds of cationic modified flocculants. , After treatment of wastewater quality has been greatly improved.

 

2, lignin derivatives

 

Since the 1970s, the synthesis of quaternary ammonium cationic surfactants with lignin as raw material has been studied abroad, and the flocculation effect is good. The results showed that the lignin cationic surfactant had good flocculation performance and the decolorization rate was over 90%. The results showed that the lignin cationic surfactant had good flocculation performance. Zhang Zhilan and other straw pulp black liquor to extract lignin, as a flocculant, and with aluminum chloride, polyacrylamide effect were compared to confirm the lignin treatment of printing and dyeing wastewater superiority. Lei Zhongfang and other research from the anaerobic treatment of alkali pulp before and after the extraction of lignin as a flocculant, treatment of printing and dyeing wastewater, and achieved good results, on the basis of this side of the Swiss side of the lignin flocculation Mechanism, proved that the lignin flocculant is a high turbidity, acid waste with special effects of water treatment agent.

 

3, other natural polymer flocculant

 

Gong Shiguo and other natural resources as the main raw material, the physical and chemical processing made after the two new composite coagulation decolorizer ASD-Ⅱ dyeing and printing plant reduction, curing, nafta and cationic and reactive dyes dyeing wastewater flocculation Decolorization experiment, decolorization rate of more than 80% on average, up to 98% or more, COD removal rate of more than 60% on average, up to 80% or more. Zhang Qiuhua et al. Used the developed carboxymethyl chitosan flocculant to treat the dyeing wastewater of the towel factory. The experimental results showed that the carboxymethyl chitosan flocculant was superior to other commonly used in the decolorization of wastewater and COD removal effect Molecular flocculant.

 

Second, sterilization algae

 

Can effectively dig algae propagation and slime growth, in different PH value range have a good ability to sterilization and algae, and dispersion and penetration, can penetrate and remove slime and peeling attached to the algae, in addition, As well as to oil capacity. Widely used in circulating cooling water system, oil field water injection system, chilled water system, as non-oxidizing sterilization algae agent, slime stripping agent used, can also be used as acrylic fiber dyeing and its textile processing before the smooth And antistatic treatment.

 

Third, scale and corrosion inhibitor

 

Hydroxyethylidene diphosphonic acid HEDP

 

Features: is an organic phosphoric acid scale and corrosion inhibitor, with iron, copper, zinc and other metal ions to form a stable complex, can dissolve the metal surface oxide. In 250 ℃ can still play a good corrosion and scale inhibition effect, at high pH is still very stable, easy to hydrolysis, the general conditions of light and heat is not easy to break down. Acid and alkali resistance, chlorine oxidation performance than other organic phosphoric acid (salt) is good. HEDP can form a six-ring chelate with metal ions in water, especially calcium ions, so HEDP has a good scale inhibition effect and has a significant dissolution effect, and when used in combination with other water treatment agents, it is ideal Synergistic effect. HEDP solid is a high purity product, suitable for cold winter areas; especially for the electronics industry, cleaning agents and daily chemical additives.

 

Application scope and use method

 

Widely used in electric power, chemical industry, metallurgy, fertilizer and other industrial circulating cooling water system and medium and low pressure boilers, oilfield water injection and oil pipeline scale inhibition and corrosion inhibition; in the textile industry, can be metal and non-metallic cleaning agent, bleaching and dyeing Industrial peroxide stabilizer and fixing agent, cyanide plating industry complexing agent. It is usually used in combination with polycarboxylate scale inhibitor.

 

Water treatment agent development trend of green

 

At the turn of the century, the development direction of world chemistry and chemical discipline has undergone a major and revolutionary change, and its mark is the concept of "green chemistry". As a special chemical water treatment agent, its development strategy and green chemistry are closely related.

 

Water treatment agent for the pursuit of green from the sustainable development strategy to achieve the green water treatment products, water treatment agent production of raw materials and conversion reagents green, water treatment agent production reaction of the green, water treatment agent production reaction The conditions of the green has become the subject of natural science and focus on research and development direction.

 

The most important issue is the greening of the target molecular water treatment products, because there is no target molecule, it can not have its production process. From the concept of green chemistry, according to the author's practice and experience, green water treatment agent can start from the following aspects. Designing safer water treatment agents The concept of green chemistry is re-shaping the direction of water treatment technology and water treatment chemicals. Biodegradable, that is, substances can be decomposed into simple microbes, the environment allows the form, is to limit the accumulation of chemical substances in the environment an important mechanism. Therefore, biodegradability should be considered first when designing new water treatment agents that are more environmentally friendly and safer for humans.

 

Our synthetic experiments show that the linear molecular polyaspartic acid with high molecular weight has excellent dispersion, corrosion inhibition, chelating and other functions, can be used as scale inhibitors, corrosion inhibitors and dispersants. Reappraisal of existing water treatment products Since the beginning of the 1970s, modern water treatment technology and water treatment agents in China since the research and development has made many important results. Especially in the "Eighth Five-Year" and "Ninth Five-Year" period, the state of water treatment agent research and development to focus on support, greatly promoted the progress of water treatment science and technology, formed a series of independent intellectual property rights of technology and products.

 

At present, our water treatment chemicals are mainly corrosion inhibitors, scale inhibitors, biocides and flocculants, corrosion inhibitors and scale inhibitors in the field of variety development are close to the international advanced level. At present, the formula for the water quality stabilizer for industrial circulating cooling water is mainly about 52 to 58 percent, the molybdenum formula is 20 percent, the silicone formulation is 5 percent to 8 percent, the tungsten formula is 5 percent %, Other formula accounted for 5% to 10%. The concept of green chemistry is reassessing the role and performance of existing water treatment chemicals. Biodegradability is a most important evaluation indicator for products that have long been known for these functions.