Scale inhibitor combination, preparation method thereof and sewage treatment method

The technology of a composition and a scale inhibitor, which is applied to the field of scale inhibitor composition and its preparation and sewage treatment, can solve the problems of increased scaling, increased cleaning work, increased alkalinity and the like, and achieves the promotion of flocculation effect, Simple to use and stable anti-scaling performance

Active Publication Date: 2010-06-23
CHINA PETROLEUM & CHEM CORP +1
1 Cites 73 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] If the alkali slag produced in the production process of the refinery directly enters the sewage treatment system (especially the air flotation unit) for treatment, the pH value of the sewage will increase (the range is around 10), the alkalinity will increase, and the scaling will increase. Low levels of scaling ions such as calcium and magnesium can also lead to fouling of water pump impellers and pipes. Scale cleaning of water pipes and pump impellers is required every half a month, which not only affects the normal operation of the sewage treatment system operation, the sewage treatment...
View more

Abstract

The invention relates to a scale inhibitor combination, a preparation method thereof and a sewage treatment method. The scale inhibitor combination is characterized in that the combination comprises small molecular organic scale inhibitor containing phosphor, polymer scale inhibitor, flocculating agent, water soluble inorganic zinc salt and water, wherein the molecular weight of the small molecular organic scale inhibitor containing phosphor is 100 to 2000. The scale inhibitor combination of the invention is single preparation, the use and the operation are simple and the scale inhibition performance is stable; and the scale inhibitor combination can promote the flocculation effect.

Application Domain

Treatment using complexing/solubilising chemicalsWater/sewage treatment by flocculation/precipitation

Technology Topic

ChemistryWater soluble +5

Image

  • Scale inhibitor combination, preparation method thereof and sewage treatment method
  • Scale inhibitor combination, preparation method thereof and sewage treatment method

Examples

  • Experimental program(9)

Example Embodiment

[0016] The preparation method of the scale inhibitor composition provided by the invention comprises mixing the phosphorus-containing small molecule organic scale inhibitor, polymer scale inhibitor, flocculant, water-soluble inorganic zinc salt and water.
[0017] Wherein, the mixing method includes dissolving the flocculant in water, adding water-soluble inorganic zinc salt, mixing evenly, and then mixing the obtained solution with phosphorus-containing small-molecule organic scale inhibitor and polymer scale inhibitor.
[0018] After the flocculant is dissolved in water and the water-soluble inorganic zinc salt is added, the mixing conditions may include stirring at a temperature of 0-100°C for 1-8 hours, preferably stirring at a temperature of 20-80°C for 2-6 hours. During the process of adding the water-soluble inorganic zinc salt, the pH is controlled to be 1-7, preferably 2-6. The pH can be adjusted with conventional soluble inorganic and/or organic acid and alkali solutions, for example, the acid solution can be one or more of the aqueous solutions of hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid or acetic acid. The alkaline solution may be one or more of sodium hydroxide, potassium hydroxide, sodium silicate, potassium silicate, ammonia water or an aqueous solution of ethanolamine, diethanolamine, triethanolamine, ethylenediamine, and polyethylenepolyamine.
[0019] Preferably, the method of adding the water-soluble inorganic zinc salt includes first dissolving the water-soluble inorganic zinc salt in water to form a solution, and then adding the solution to the solution formed by dissolving the flocculant in water.
[0020] The method of mixing the obtained solution with the phosphorus-containing small molecule organic scale inhibitor and the polymer scale inhibitor can be a conventional method, such as stirring, preferably, stirring for 1-6 hours
[0021] The amount of the phosphorus-containing small molecule organic scale inhibitor, polymer scale inhibitor, flocculant, inorganic zinc salt and water is, based on the total weight of the scale inhibitor composition, the phosphorus-containing small molecule organic scale inhibitor The content of antiscalant is 1-15% by weight, preferably 5-10% by weight; the content of polymer scale inhibitor is 1-25% by weight, preferably 5-23% by weight; the content of flocculant is 0.1-15% by weight , preferably 0.5-10% by weight; the content of inorganic zinc salt is 1-30% by weight, preferably 10-25% by weight; the content of water is 15-96.9% by weight, preferably 32-79.5% by weight.
[0022] The sewage scale inhibition treatment method provided by the invention includes adding the scale inhibitor composition provided by the invention to the sewage before the sewage is treated or during the sewage treatment process.
[0023] Wherein, 100-250 grams of the scale inhibitor composition is added to every 1 ton of sewage.
[0024] The oil content of the sewage can be 0.1-150 mg/L, and the COD is 0.1-300 mg/L.

Example Embodiment

[0026] Example 1
[0027] 13 grams of polyaluminum chloride (Gongyi Yujie filter material factory) was added to a 200 milliliter beaker, 25 milliliters of deionized water was added to dissolve it, and 18 grams of zinc chloride (Beijing Chemical Plant) was added under agitation. During the process, a hydrochloric acid solution with a volume concentration of 10% is used to control the pH to be 2-6. After the zinc chloride is completely dissolved, add water to make the total amount of the solution reach 100 grams, take 70 grams of it and place it in a 200ml beaker, add 9 grams of HEDP and 21 grams of acrylic acid-2-acrylamido-2'-methylpropylsulfonate Acid copolymer (Beijing Linhua Water Quality Stabilizer Factory, ZF329LH), stirred, dissolved and mixed to obtain scale inhibitor composition D1. The prepared scale inhibitor composition was transferred to a 150ml ground-mouth Erlenmeyer flask and stored at room temperature until use.

Example Embodiment

[0028] Example 2
[0029] Weigh 18 grams of zinc chloride and dissolve in 20 milliliters of deionized water for later use. Under the condition of 80 DEG C, get 20 grams of 50% aluminum sulfate solution in the there-necked flask with stirrer, thermometer, first drop 5 grams of phosphoric acid, then add dropwise the above-mentioned zinc chloride solution and 25 grams of sodium silicate solution ( The mass concentration is 3.24%). During this process, the pH value of the solution is controlled to be 1-7, and deionized water is added to make the total amount of the solution reach 100 grams, and stirred for 2 hours. Take 70 grams of it in a 200ml beaker, add 9 grams of HEDP and 21 grams of acrylic acid-2-acrylamide-2'-methylpropylsulfonic acid copolymer (Beijing Linhua Water Quality Stabilizer Factory, ZF329LH) respectively, and stir to dissolve After mixing, the scale inhibitor composition D2 is obtained. The prepared scale inhibitor composition was transferred to a 150ml ground-mouth Erlenmeyer flask and stored at room temperature until use.

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Household appliance control method and device and mobile terminal

InactiveCN103605531Aeasy to operateeasy to use
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1

Multi-stage oral-fluid testing device

ActiveUS20160121322A1easy to use
Owner:PREMIER BIOTECH LLC

System and method of monitoring temperature

InactiveUS7140768B2less susceptible to tampereasy to use
Owner:COLD CHAIN TECH

Classification and recommendation of technical efficacy words

  • Easy to use
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products