Composite flocculant as well as preparation method and application thereof

A composite flocculant and mixed solution technology, which is applied in dehydration/drying/concentrated sludge treatment, mining wastewater treatment, etc., can solve the problems of oily sludge with complex components, large component changes, poor flocculation effect, etc., and achieve reduction Treatment costs and operating costs, good water solubility, good flocculation effect

Inactive Publication Date: 2017-12-29
NANJING BALANCE ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used oily sludge dewatering flocculant is mostly a single organic or inorganic flocculant, which has poor flocculation effect and poor applicability, and is not suitable for oily sludge with complex components and large component changes.

Method used

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  • Composite flocculant as well as preparation method and application thereof
  • Composite flocculant as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This embodiment provides a composite flocculant, which is made of various raw materials, in parts by weight, the various raw materials include 0.1 part of cationic polyacrylamide, 1.0 part of calcium chloride, 0.5 part of sodium silicate, and 8 parts of polymeric sulfuric acid aluminum and 0.5 part disodium edetate.

[0042] This embodiment also provides a method for preparing a composite flocculant, which includes the following steps: mixing 0.1 part of cationic polyacrylamide, 1.0 part of calcium chloride, 0.5 part of sodium silicate, 8 parts of polyaluminum sulfate and 0.5 part of ethylenediamine Disodium tetraacetate is dissolved in 1000 parts of water.

Embodiment 2

[0044] This embodiment provides a composite flocculant, which is made of various raw materials, in parts by weight, the various raw materials include 0.5 parts of cationic polyacrylamide, 2.5 parts of calcium chloride, 2.0 parts of sodium silicate, 20 parts of polymeric sulfuric acid Aluminum and 2.0 parts of disodium edetate.

[0045] This embodiment also provides a method for preparing a composite flocculant, which includes the following steps:

[0046] First, in parts by weight, 0.5 parts of cationic polyacrylamide is dissolved in water to obtain a cationic polyacrylamide aqueous solution with a mass fraction of 0.1%; a mixture of 2.0 parts of sodium silicate and 2.0 parts of disodium edetate is mixed with The cationic polyacrylamide aqueous solution was stirred and mixed to obtain a first mixed solution, wherein 18 g of the mixture was added to every liter of cationic polyacrylamide aqueous solution.

[0047] Secondly, 2.5 parts of calcium chloride, 20 parts of polyalumin...

Embodiment 3

[0050] This embodiment provides a composite flocculant, which is made of various raw materials, in parts by weight, the various raw materials include 0.3 parts of cationic polyacrylamide, 1.5 parts of calcium chloride, 0.8 parts of sodium silicate, 10 parts of polymeric sulfuric acid Aluminum and 1.0 parts disodium edetate.

[0051] This embodiment also provides a method for preparing a composite flocculant, which includes the following steps:

[0052] First, in parts by weight, 0.3 parts of cationic polyacrylamide is dissolved in water to obtain a cationic polyacrylamide aqueous solution with a mass fraction of 0.3%; a mixture of 0.8 parts of sodium silicate and 1.0 parts of disodium edetate is powdered After being purified to 150 mesh, it was stirred and mixed with an aqueous solution of cationic polyacrylamide to obtain the first mixed solution, wherein 40 g of the mixture was added to every liter of aqueous solution of cationic polyacrylamide.

[0053] Secondly, 1.5 parts...

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Abstract

The invention discloses a composite flocculant as well as a preparation method and an application thereof and relates to the technical field of oily sludge treatment. The composite flocculant is prepared from raw materials in parts by weight as follows: 0.1-0.5 parts of cationic polyacrylamide, 1.0-2.5 parts of calcium chloride, 0.5-2.0 parts of sodium silicate, 8-20 parts of polyaluminium sulfate and 0.5-2.0 parts of EDTA-2Na. The raw materials in the proportion range have a synergistic interaction effect, the oily sludge treatment effect is good, demulsification can be realized without assistance of ultrasonic waves, heating or other methods, treatment cost and operation cost of oily sludge are reduced, and the composite flocculant has good water solubility, high stability and good flocculation effect and is widely applied to the oily sludge treatment process. The preparation method of the composite flocculant is simple and feasible and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of oily sludge treatment, and in particular to a composite flocculant, its preparation method and application Background technique [0002] In the process of oil exploration, mining, refining, tank cleaning, storage and transportation, a large amount of oily sludge is produced due to accidents, escape, leakage, etc., often causing serious environmental pollution. According to different sources, oily sludge is basically divided into three types: landing oily sludge, tank bottom oily sludge and refinery oily sludge. During oilfield exploitation, especially oil well production and downhole construction, some crude oil is blown out or carried to the ground or well site by oil pipes, sucker rods, pumps and other downhole tools, and these crude oil seeps into the ground soil to form oily sludge . In the process of crude oil production and transportation, due to natural settlement, various dehydration tanks, oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F103/10
CPCC02F11/14C02F2103/10
Inventor 张继荣徐虹张迪
Owner NANJING BALANCE ENVIRONMENTAL TECH CO LTD
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