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A kind of preparation method of polyaluminum sulfate chloride flocculant

A technology of aluminum chloride sulfate and flocculant, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that water insolubles and heavy metals are easy to exceed the standard, and the production cost is high , slow flocculation speed and other problems, to achieve a wide range of market application prospects, good flocculation effect

Active Publication Date: 2021-12-28
广西锋盛环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyaluminum chloride currently provided still has the disadvantages of slow flocculation speed, poor flocculation effect, water-insoluble matter and heavy metals are easy to exceed the standard, and high production cost.

Method used

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  • A kind of preparation method of polyaluminum sulfate chloride flocculant
  • A kind of preparation method of polyaluminum sulfate chloride flocculant
  • A kind of preparation method of polyaluminum sulfate chloride flocculant

Examples

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Effect test

Embodiment 1

[0022] A preparation method of polyaluminum sulfate flocculant, comprising the steps of:

[0023] (1) According to the following weight ratio, add 2 tons of sulfuric acid (80% concentration), 10 tons of aluminum hydroxide, 4 tons of water and 16 tons of hydrochloric acid (30% concentration) into the reactor A, at 0.5MPa, 140°C Reaction 3h, makes aluminum chloride liquid;

[0024] (2) Add 13 tons of aluminum sulfate liquid (alumina content 7.5%), 1 kg of sodium citrate, and 20 kg of sodium metaaluminate to reaction kettle B, and react for 3 hours at a temperature of 80°C under normal pressure to obtain aluminum sulfate liquid;

[0025] (3) Transport the aluminum chloride liquid to the reaction kettle C, then pump 8 tons of calcium aluminate powder and 16 tons of water, and react for 1 hour at a temperature of 100°C at normal pressure, then pump in the liquid aluminum sulfate at normal pressure and temperature of React at 80°C for 2 hours to obtain the reaction product;

[002...

Embodiment 2

[0028] A preparation method of polyaluminum sulfate flocculant, comprising the steps of:

[0029] (1) According to the following weight ratio, add 3 tons of sulfuric acid (80% concentration), 12 tons of aluminum hydroxide, 5 tons of water and 20 tons of hydrochloric acid (30% concentration) into the reactor A, at 0.4MPa, 150℃ React for 2.5h to obtain aluminum chloride liquid;

[0030] (2) Add 12 tons of aluminum sulfate liquid (alumina content 7.5%), 1.5 kg of sodium citrate, and 30 kg of sodium metaaluminate to reaction kettle B, and react at a temperature of 90°C under normal pressure for 2 hours to obtain aluminum sulfate liquid;

[0031] (3) Transport the aluminum chloride liquid to the reaction kettle C, then pump 7 tons of calcium aluminate powder and 18 tons of water, and react for 1 hour at a temperature of 120°C at normal pressure, then pump in the liquid aluminum sulfate, at normal pressure and at a temperature of React at 90°C for 3 hours to obtain the reaction pro...

Embodiment 3

[0034] A preparation method of polyaluminum sulfate flocculant, comprising the steps of:

[0035] (1) Add 3 tons of sulfuric acid (concentration: 80%), 15 tons of aluminum hydroxide, 4 tons of water and 18 tons of hydrochloric acid (concentration: 30%) into reactor A according to the following weight ratio, and put them at 0.6MPa and 135°C React for 3.5h to obtain aluminum chloride liquid;

[0036] (2) Add 14 tons of aluminum sulfate liquid (7.5% alumina content) and 2.5 kg of sodium citrate and 40 kg of sodium metaaluminate to reaction kettle B, and react for 3.5 hours at a temperature of 80°C under normal pressure to obtain aluminum sulfate liquid ;

[0037] (3) Transport the aluminum chloride liquid to the reaction kettle C, then pump 8 tons of calcium aluminate powder and 15 tons of water, and react for 1 hour at a temperature of 100°C at normal pressure, then pump in the liquid aluminum sulfate at normal pressure and temperature of React at 100°C for 2 hours to obtain t...

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Abstract

The invention discloses a preparation method of polyaluminum sulfate chloride flocculant, which comprises the following steps: according to the following weight ratio, 1-3 tons of sulfuric acid, 8-15 tons of aluminum hydroxide, 3-5 tons of water and 15 tons of hydrochloric acid ‑20 tons are added to reactor A, reacted at high temperature and high pressure for 2‑4h, and aluminum chloride liquid is obtained; 10‑15 tons of aluminum sulfate liquid, sodium citrate and sodium metaaluminate are added to the reactor B to form a stabilizer React under normal pressure for 2-4 hours to obtain aluminum sulfate liquid; transport the aluminum chloride liquid to reactor C, then pump 6-10 tons of calcium aluminate powder and 15-20 tons of water, and react for 1-2 hours under normal pressure , and then pump aluminum sulfate liquid, and react under normal pressure for 2-3 hours to obtain the reaction product; then press filter, dry, and pack to obtain polyaluminum sulfate flocculant. The test result of the polyaluminum sulfate flocculant product prepared by this method is that the Al2O3 content reaches 30-35%, the basicity reaches 65-90%, and the sulfate radical content reaches 5.5-6.5%, which has an efficient flocculation effect , can quickly purify heavy metal ions, COD, TP and other pollutants in wastewater.

Description

technical field [0001] The invention relates to the technical field of flocculants, in particular to a preparation method of polyaluminum sulfate flocculants. Background technique [0002] At present, the problem of disorderly discharge of industrial waste liquid in chemical, metallurgical, pharmaceutical and other enterprises is prominent. Heavy metal pollutants such as arsenic, mercury, chromium, and nickel are easily discharged illegally along with waste liquid, thereby polluting surrounding soil, rivers, and groundwater, causing changes in the ecological environment. Removing heavy metals from waste liquids by flocculation-coagulation is one of the most commonly used methods for the disposal of industrial waste liquids. Commonly used flocculants on the market include inorganic flocculants and organic flocculants, specifically polyaluminum chloride (PAC), polyaluminum sulfate (PAS), polyferric chloride (PFC) and polyferric sulfate, polyacrylamide (PAM) Wait. [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236
Inventor 向启开陆锋农成龙黄海林黄政瑛韦晨熙
Owner 广西锋盛环保科技有限公司