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**High and low, if the use of anionic polyacrylamide, **between 9-13 yuan, if the use of cationic polyacrylamide, **between 10-17 yuan, ionization and hydrolysis are different, polyacrylamide ** has a large difference, secondly, according to the needs of users, polyacrylamide manufacturers can configure different content of polypropylene, ** is also different, **low products, usually used in large quantities.
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River sand generally uses anionic polyacrylamide, the unified molecular weight standard is 18 million, the factory ** of pure products is about 9k, of course, if it is lower than this**, the lower the content**, the lower the dosage, the corresponding dosage will increase, it is recommended to use pure products The best effect, the amount of 1,000 tons of water is about 50kg, that is, 2 bags, I am a chemical factory, the production of this thing, pure hand look.
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The flocculant used in the sand washing plant is generally anionic polyacrylamide, the molecular weight of anionic polyacrylamide is high and low, and there will be high and low, about 6000-10000 yuan, the sand water of the sand washing plant in each place is different, and the model of polyacrylamide used is also different, and some will also use cationic polyacrylamide, but not much, because cationic polyacrylamide is expensive, a ton is between 15000-18000 yuan, Therefore, anionic polyacrylamide is the most used model in sand washing plants;
If we want to achieve better results and more suitable products, we can send the sand water samples from the sand washing plant to the manufacturer, and our laboratory can analyze and test and then select the appropriate polyacrylamide model after selection.
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It is better to use anionic flocculant for sand washing, and anionic polyacrylamide is usually selected to treat, anionic polyacrylamide is white particles in appearance, which is a water-soluble polymer, because its molecular chain contains a certain number of polar genes.
It can be used to absorb solid particles suspended in water, to bridge between particles or to condense particles to form large flocs through charge neutralization. Therefore, it can accelerate the sedimentation of particles in suspension, and has obvious effects such as speeding up the clarification of the solution and promoting filtration.
Precautions for use.
1. Dissolution temperature. A certain temperature is required to dissolve to speed up the dissolution. However, the temperature is too high to break the molecular chain of the polymer, thereby reducing the use effect, and the most suitable dissolution temperature is 50-60.
2. Stirring conditions. Dissolution should avoid excessive shear stirring, too strong stirring will break the molecular weight, thereby reducing the use effect. It is advisable to use low-speed pulp blades for stirring, such as anchor type, frame type, multi-layer slurry type, etc.
The stirring speed is about 60 rpm. The use of highly centrifugal pumps should be avoided during transportation, and piston pumps or diaphragm pumps are more suitable.
3. Evenly disperse and feed. The key link in the dissolution of polyacrylamide is the uniform dispersion of the feeding. After starting the mixer, the mechanical vibrating screen can be used to feed (the mesh number of the screen is 10 mesh) to avoid the production of "large lumps" and "fisheye-shaped" insoluble particles as much as possible, so that the flocculant can be fully dissolved to give full play to its use effect.
4. Avoid contact with iron. In the dissolution, stirring and conveying and dosing system, plastic, enamel, aluminum, stainless steel and other materials can be used.
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Generally, anions are normally used, but in practice, it is necessary to correctly determine what ion type to use through a small test of water samples.
For example, like Jianghe Chemical, water samples can be tested for free.
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Most of the sewage from the sand washing plant usually uses anionic flocculant to meet the demand, but there are also some needs to use cationic flocculant, which specific type of flocculant to use should be determined according to the on-site water quality, experimental small test, large test.
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Shanghai Weizhuo Chemical Flocculant for Sand Washing Plant can choose products with low hydrolysis degree, because the viscosity of the highly hydrolyzed flocculant is too large, and the filter cloth will stick to the filter cloth during use, and it cannot be produced normally
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Generally, it is possible to use real low molecular weight anionic polyacrylamide, but now there are many polyacrylamide ginseng and miscellaneous goods, and the use effect is completely different by reducing the content of high molecular weight to achieve a similar low molecular weight state. Because many battlefield bosses only look at the surface, after all, a penny for a product, the cheap dosage is large, the good dosage is small but high, and it is very clear after comparison.
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Quarry, stone sand washing field, sludge dewatering should use flocculant polyacrylamide, with sand washing special sunshine environmental protection flocculant, not only good flocculation effect, less dosage, the moisture content of the mud is still very low. There are not many flocculant manufacturers in the northwest region, and the larger ones are Shaanxi Fumiao Environmental Protection, Xi'an Rihui Environmental Protection, etc., and the quality of the manufacturer is reliable and guaranteed.
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The sewage treatment of sand washing field generally uses "Shouxin" anionic polyacrylamide as the flocculant for sand washing. Anionic polyacrylamide is a water-soluble polymer. Because its molecular chain contains a certain number of polar groups, it can adsorb solid particles suspended in water, so that the particles can be bridged or neutralized by charge to form large flocs.
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After adding mud precipitant, the sediment removal rate is more than 95%, and the water in the clear liquid tank can be directly returned to the sand washing system, so as to achieve zero discharge. The slurry precipitant used in the wastewater treatment of the system is generally anionic type. The unit processing cost of the agent is very low, and the return rate is higher than the size of the floc
If the floc is too small, it will affect the speed of drainage, and if the floc is too small, it will constrain more water and reduce the degree of mud biscuits. After selecting the molecular weight of the slurry precipitant, the size of the floc can be adjusted. Through electrical neutralization, chemical bridging and other actions, the water is separated from the particles, and the particles are condensed into large flocculents, which can improve the dewatering performance of the sludge.
(Haonuo Water Treatment).
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The domestic production of polyacrylamide flocculant brands for sand washing fields are: Baomo, Tianrun, Shouxin, etc.
Shouxin Chemical. Founded in 2007, Shouxin Chemical is a professional polyacrylamide chain resource integration company, integrating nearly 100 models of products in the industry, the company has cationic polyacrylamide, anionic polyacrylamide, nonionic polyacrylamide, zwitterionic polyacrylamide four major product series.
Anhui Tianrun. Anhui Tianrun Chemical Industry Co., Ltd. is a joint-stock enterprise approved by Anhui Province in January 2001, mainly including 35000t a phthalic anhydride, 38000t a polyacrylamide, 1000t a oilfield chemicals, 1500t a fumaric acid, 3000t a acrylamide crystals, etc. The products are mainly used in plastics, resins, oil fields, textiles, papermaking, water treatment, medicine and other fields, and are also exported to Europe, America, Russia, India, Egypt, Hong Kong and other countries and regions.
The flocculation and precipitation method is to use inorganic flocculants (such as aluminum sulfate) and organic anionic flocculant polyacrylammonium (PAM) to prepare an aqueous solution and add it to the wastewater, which will produce a compressed electric double layer, so that the suspended particles in the wastewater lose stability, and the colloidal particles coagulate with each other to increase the particles and form flocs and alum flowers. After the floc grows to a certain volume, it will be separated from the aqueous phase and precipitated under the action of gravity, so as to remove a large amount of suspended solids in the wastewater, so as to achieve the effect of water treatment. In order to improve the separation effect, coagulants can be added in a timely and appropriate amount. >>>More