Efficient composite flocculant preparation method

A composite flocculant, high-efficiency technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc., can solve the problem of insufficient removal speed of inorganic flocculants, and achieve excellent flocculation performance and settling speed Fast, wide-ranging effects

Inactive Publication Date: 2018-07-24
江西德弘环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention provides a preparation method of a high-efficiency composite flocculant using clay and diatomaceous earth as raw materials to solve the problem of the application of inorganic flocculants in the removal rate of sewage and insufficient removal speed

Method used

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  • Efficient composite flocculant preparation method

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Effect test

Embodiment 1

[0028] S1: Take 100g of pottery clay and crush and grind it with a ball mill or a sand mill, pass all the solids through a 100-mesh sieve, put the qualified pottery clay in a muffle furnace, and calcinate at 750°C for 3 hours;

[0029] S2: Add hydrochloric acid with a mass fraction of 25% in the there-necked flask, raise the temperature to 120°C, add the calcined clay three times while stirring, the solid-liquid ratio is 1:5, and the reaction time is 3 hours, so that the aluminum and iron in the material Maximize the dissolution, filter while it is hot, test the aluminum and iron content of the liquid after cooling, and cool the solid for standby;

[0030] S3: adding an appropriate amount of aluminum hydroxide to the obtained aluminum ferric acid solution to adjust the aluminum content and pH, stirring and reacting at 120° C. for 3 hours, and cooling at room temperature for 24 hours after the reaction;

[0031] S4: Dry and weigh the solid after acid dissolution, put it into an...

Embodiment 2

[0036] S1: Take 100g of pottery clay and use a ball mill or sand mill to crush and grind all the solids through a 100-mesh sieve, put the qualified pottery clay in a muffle furnace, and calcinate at 760°C for 3 hours;

[0037] S2: Add hydrochloric acid with a mass fraction of 25% in the there-necked flask, raise the temperature to 120°C, add the calcined clay three times while stirring, the solid-liquid ratio is 1:5, and the reaction time is 3 hours, so that the aluminum and iron in the material Maximize the dissolution, filter while it is hot, test the aluminum and iron content of the liquid after cooling, and cool the solid for standby;

[0038] S3: adding an appropriate amount of aluminum hydroxide to the obtained aluminum ferric acid solution to adjust the aluminum content and pH, stirring and reacting at 120° C. for 3 hours, and cooling at room temperature for 24 hours after the reaction;

[0039] S4: Dry and weigh the solid after acid dissolution, put it into an autoclav...

Embodiment 3

[0044] S1: Take 100g of pottery clay and use a ball mill or a sand mill to crush and grind all the solids through a 100-mesh sieve, put the qualified pottery clay in a muffle furnace, and calcinate at 780°C for 3 hours;

[0045] S2: Add hydrochloric acid with a mass fraction of 25% in the there-necked flask, raise the temperature to 120°C, add the calcined clay three times while stirring, the solid-liquid ratio is 1:5, and the reaction time is 3 hours, so that the aluminum and iron in the material Maximize the dissolution, filter while it is hot, test the aluminum and iron content of the liquid after cooling, and cool the solid for standby;

[0046] S3: adding an appropriate amount of aluminum hydroxide to the obtained aluminum ferric acid solution to adjust the aluminum content and pH, stirring and reacting at 120° C. for 3 hours, and cooling at room temperature for 24 hours after the reaction;

[0047] S4: Dry and weigh the solid after acid dissolution, put it into an autocl...

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Abstract

The invention discloses an efficient composite flocculant preparation method. The preparation method comprises the following steps: choosing argil and diatomite, breaking, grinding, calcining at the high temperature, dissolving in the acid, filtering, separating, dissolving in the acid, mixing, polymerizing, compounding, spraying and drying. An inorganic composite flocculant prepared through the method not only has the advantage of the traditional poly aluminum salt and ferric salt flocculant and the increased molecular weight of the polysilicic acid, improves the flocculation effect, but alsohas the performances of improving the sedimentation velocity and removing the unpleasant smell by introducing the diatomite, and has an excellent water purifying effect and a broad application prospect, meanwhile, the feasible process having a higher additional value is provided for the utilization of the pottery clay, and the purifying effect of the diatomite is utilized to the greatest extent.

Description

technical field [0001] The invention relates to a preparation method of an inorganic polymer compound flocculant, in particular to a preparation method of a composite polyaluminum-iron silicate flocculant by using clay and diatomite. Background technique [0002] Flocculant can promote colloidal particles and other suspended particles to aggregate into amorphous flocs and settle down. It is a necessary chemical reagent in the process of sewage treatment. Due to the high price of organic polymer flocculants and the limited use conditions, the proportion of inorganic flocculants is relatively high in sewage treatment. At present, the most researched inorganic polymer flocculants are polyaluminum salt flocculants and polyiron flocculants. Aluminum salt flocculants have large flocs and good color removal performance, but are not easy to precipitate; iron salt flocculants have dense flocs and a fast sedimentation rate, but iron ions have adverse effects on industrial water and a...

Claims

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Application Information

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IPC IPC(8): C02F1/52
CPCC02F1/5236
Inventor 刘坤吉徐前进
Owner 江西德弘环保科技有限公司
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