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Preparation of waste water treating agent by using active calcium silicate and treatment method for papermaking waste water

A technology of wastewater treatment agent and active calcium silicate, which is applied in the direction of processing wastewater treatment, adsorption water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problem that the treatment system occupies a large area, restricts production development, and equipment Large investment and other issues to achieve the effect of improving the solid-liquid separation effect, promoting rapid adsorption, and eliminating odor

Inactive Publication Date: 2013-07-17
DATANG INT HIGH ALUMINA COAL R & D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned commonly used treatment methods all require a complete treatment system to realize, such as aeration of wastewater, sludge concentration and dehydration, etc., the process flow is complicated, the investment in equipment is large, and the entire treatment system occupies a large area. It has been widely used in China, but it is difficult for many small enterprises to do it technically and financially, which also restricts their production development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation of embodiment 1 waste water treatment agent

[0027] Raw material ratio of treatment agent (parts by weight):

[0028] Active calcium silicate 95, polyaluminum chloride 5, cationic polyacrylamide (CPAM) 0.01.

[0029]After weighing the raw materials of the above-mentioned treatment agents, they are put into the compounding reformer in proportion, the temperature is controlled at 40-80° C., the stirring speed is 600 rpm, and the stirring and compounding time is maintained at 15 minutes to obtain the waste water treatment agent.

[0030] The active calcium silicate used comes from the production process of extracting alumina from high-alumina fly ash. The product is in the form of honeycomb particles with a specific surface area of ​​150-200㎡ / g, a porosity of 0.25-0.45mg / l, and an oil absorption value of 130-170ml. For details, please refer to the embodiment method disclosed in the invention application 201110117710.9, and the following embodiments are th...

Embodiment 2

[0031] The preparation of embodiment 2 waste water treatment agent

[0032] Raw material ratio of treatment agent (parts by weight):

[0033] Active calcium silicate 82, bentonite 15, aluminum sulfate 3, cationic polyacrylamide (CPAM) 0.01.

[0034] After weighing various raw material treatment agents, they are added into the compound modifier in proportion, the temperature is controlled at 40-80° C., the stirring speed is 800 rpm, and the mixing and compounding time is maintained at 20 minutes to obtain the waste water treatment agent.

Embodiment 3

[0035] The preparation of embodiment 3 waste water treatment agent

[0036] Raw material ratio of treatment agent (parts by weight):

[0037] Active calcium silicate 60, wollastonite 27, bentonite 10, aluminum sulfate 3, cationic polyacrylamide (CPAM) 0.01.

[0038] After weighing various raw material treatment agents, they are added in proportion to the compound modifier, the temperature is controlled at 40-80°C, the stirring speed is 800rpm, and the stirring and compounding time is maintained at 30min to obtain the waste water treatment agent.

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Abstract

The invention provides preparation of a waste water treating agent by using active calcium silicate and a treatment method for papermaking waste water, belonging to the technical field of environment protection. The waste water treating agent comprises, by weight, 60 to 98 parts of active calcium silicate, 0.5 to 40 parts of an inorganic flocculating agent and 0.01 to 0.5 part of an organic polymeric flocculant. The above-mentioned components are blended in a composition modification device so as to prepare the waste water treating agent. The treatment method for papermaking waste water comprises the following steps: adding the treating agent accounting for 0.2 to 2% of the weight of waste water to be treated into the papermaking waste water; stirring the waste water for 5 to 30 min so as to realize adsorption treatment; stopping stirring and carrying out standing for 5 to 30 min; and subjecting the treated waste water to solid-liquid separation, wherein separated water can be used as water for pulping and paper making, and separated solids can be used as a paperboard filling material after purification. According to the invention, an application scope of active calcium silicate is broadened, comprehensive utilization of resources is realized, investment and operation cost of a waste water treatment facility is greatly reduced, and the treatment method is especially applicable to medium-sized and small enterprises.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a treatment method for preparing wastewater treatment agent and papermaking wastewater by using active calcium silicate. Background technique [0002] The discharge water treatment of paper-making enterprises has always been the key monitoring object of wastewater treatment and environmental protection. Large-scale paper-making enterprises will have discharge water treatment, such as reusing the treated pulping washing water as reclaimed water. The treatment of discharged water requires the support of technology and capital investment, and there are many difficulties for many small enterprises, which also makes it difficult to eliminate the random discharge of waste water and waste. According to statistics, there are more than 1,000 small and medium-sized paper mills with an annual output of less than 50,000 tons in China. When so many small and medium-sized enterpr...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/52C02F1/56C02F103/28
Inventor 孙俊民王成海宋宝祥
Owner DATANG INT HIGH ALUMINA COAL R & D CENT
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