Low-phosphorous environment-friendly scale inhibitor adapting to 'three-high' water quality and preparation thereof

Abstract

The invention provides a low-phosphorous environment-friendly scale inhibitor adapting to 'three-high' water quality and preparation thereof. The scale inhibitor is prepared from the following raw materials in part by weight: 1, 1.0 to 2.5 parts of polyamino polyether methylene phosphonic acid (PAPEMP); 2, 1.5 to 3.0 parts of polyepoxysuccinic acid (PESA); 3, 1.5 to 2.5 parts of acrylic acid-hydroxypropyl acrylate-AMPS terpolymer; 4, 1.5 to 2.5 parts of liquid caustic soda; 5, 0.5 to 1.0 part of hydrolyzed plymaleic anhydride; and 6, the balance of water. The scale inhibitor is prepared by the following steps of: pumping the raw materials 1, 2 and 3 into a reaction kettle during synthesis, and continuously stirring; and adding the material 4 into 5 and 6, pumping into the reaction kettle, continuously stirring for 35 to 45 minutes, and discharging to prepare the product. The scale inhibitor has good scale-inhibiting effect on carbonate and phosphate and the scale-inhibiting time of 100 hours, and is suitable for a high-hardness high-alkalinity high-mineralization circulating cooling water system and oil field water treatment. Therefore, the original concentration times is improved from 3 times to 5-6 times, the new water can be saved by 10 to 30 percent per year, and the phosphorus content of sewage treated by the scale inhibitor is 1.5 to 3ppm and accords with the national phosphorus discharge standard.

Description

technical field [0001] The invention relates to a water treatment scale inhibitor, especially an environment-friendly and low-phosphorus preparation, in particular to a low-phosphorus and environment-friendly scale inhibitor suitable for "three high" water quality and its preparation. Background technique [0002] At present, for the treatment of the "three high" water quality in the western region, the general-purpose scale inhibitors are all organic phosphorus products. In addition, even if there are products with low phosphorus scale inhibitors, due to their weak scale inhibition performance, they cannot adapt to the treatment of "three high" water quality, so research and development of low phosphorus and phosphorus-free, environmentally friendly, effective Excellent green antiscalants have become the direction of research in this field. [0003] Retrieval literature disclosure: ① "Industrial Water Treatment" 2004.4 (8) published the article "A Preliminary Study on the ...

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