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Method for industrial production of polymeric aluminum ferric chloride water purification agent with coal ash

A technology of polyaluminum chloride and iron water purifier, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high production cost of calcium aluminate powder, unfavorable industrialization implementation, long production line, etc., and achieve the extension of coal The effect of industrial chain, low cost and low production cost

Inactive Publication Date: 2008-05-07
王贵明 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Some scientific research institutions in my country have studied the project of preparing polyaluminum ferric chloride (PAFC) based on fly ash. During the acid dissolution reaction process, due to the difficulty in opening the silicon-aluminum bond in fly ash, the amount of hydrochloric acid is large, and the dissolution rate of aluminum is low. Low, the production cost of adding calcium aluminate powder is high, and the economic performance of the product is poor, which is not conducive to the implementation of industrialization
At present, the main raw materials for the production of polyaluminum ferric chloride (PAFC) are bauxite and calcium aluminate powder. Bauxite is the main raw material for the ceramic industry and aluminum smelting, and is a non-renewable mineral resource in the country. The price per ton is 200 yuan Above; the price of calcium aluminate powder is about 600-800 yuan per ton. The production of polyaluminum chloride water purifying agent with bauxite as the main raw material requires ball milling and aging process, which requires two-step synthesis, long production line and occupied area. Large area, complex process, high production cost

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  • Method for industrial production of polymeric aluminum ferric chloride water purification agent with coal ash
  • Method for industrial production of polymeric aluminum ferric chloride water purification agent with coal ash

Examples

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Embodiment 1

[0016] Embodiment 1: As shown in Figure 1, a kind of method that utilizes fly ash industrial production water purifying agent-polyaluminum ferric chloride, 20 tons of fly ash is added to reactor, and injection mass percentage is 10% at the same time 30 tons of industrial waste hydrochloric acid, add 0.5 tons of sodium chloride in parts by weight, and fully stir in the reactor, the reactor is sealed to prevent acid volatilization. Inject steam for heating, heat to 80°C-95°C, and react for 1 hour until a qualified feed liquid is obtained, wherein the qualified feed liquid: the mass fraction of alumina is 10.4%, the mass fraction of iron oxide is 1.5%, and the water-insoluble The mass fraction is 0.44%, the basicity is 45, and the density is 1.19g / cm 3 , PH=3.5. Among them, the qualified feed liquid is put into the clarification tank for solid-liquid separation, and the supernatant and the coal ash waste slag of powder polyaluminum ferric chloride are separated, the separated su...

Embodiment 2

[0017] Embodiment 2: as shown in Figure 2, a kind of method that utilizes fly ash industrial production water purifying agent-polyaluminum ferric chloride, 30 tons of fly ash is added to reactor, and injection mass percentage is 20% at the same time 48 tons of industrial hydrochloric acid, add 0.1 tons of potassium chloride, and fully stir in the reactor, seal the reactor to prevent acid volatilization. Inject steam for heating, heat to 90°C-100°C, and react for 2 hours to obtain a qualified feed liquid, wherein the qualified feed liquid: the mass fraction of alumina is 11%, the mass fraction of iron oxide is 1.6%, and the content of water-insoluble The mass fraction is 0.35%, the basicity is 60, and the density is 1.20g / cm 3 , pH=5.0. Among them, put the qualified feed liquid into the clarification tank for solid-liquid separation, separate the supernatant and fly ash waste residue, inject the separated supernatant into the polymerization kettle, add 1 ton of sodium carbonat...

Embodiment 3

[0018] Embodiment 3: as shown in Figure 2, a kind of method that utilizes fly ash industrial production water purifying agent-polyaluminium ferric chloride, 25 tons of fly ash is added to reactor, injecting mass percentage simultaneously is 10% 48 tons of industrial waste hydrochloric acid, add 0.5 tons of calcium chloride, and fully stir in the reactor, seal the reactor to prevent acid volatilization. Inject steam for heating, heat to 95°C-105°C, and react for 3 hours until a qualified feed liquid is obtained, wherein the qualified feed liquid: the mass fraction of alumina is 11%, the mass fraction of iron oxide is 1.9%, and the water-insoluble The mass fraction is 0.34%, the basicity is 65.8, and the density is 1.22g / cm 3 , pH=4.5. Among them, put the qualified feed liquid into the clarification tank for solid-liquid separation, separate the supernatant and fly ash waste residue, inject the separated supernatant into the polymerization kettle, add 1.4 tons of calcium hydrox...

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Abstract

The invention discloses a method for industrially producing polyaluminum ferric chloride water purifying agent by utilizing fly ash. , put the obtained qualified feed liquid into the clarifier for solid-liquid separation, the separated supernatant liquid is injected into the polymerization kettle, add the polymerization agent, fully stir, and obtain the polyaluminum ferric chloride liquid water purifier through the polymerization reaction. The production process flow is short, the operation is simple, the production cost is low, the economic performance is good, the use cost of the raw material is reduced, the reaction time is shortened, and the reaction energy consumption is reduced. The aluminum dissolution rate in fly ash is high, the raw material cost is low, and industrial production is realized. Adding a cosolvent in the reaction process promotes the cleavage of the silicon-aluminum bond, increases the dissolution rate of aluminum, shortens the reaction time, reduces the consumption of hydrochloric acid, reduces the production cost, and improves the economic benefit of the product. The industrialization of using fly ash to produce polyaluminum ferric chloride has been realized.

Description

Technical field: [0001] The invention relates to a method for industrially producing water purifying agent-polyaluminum ferric chloride by using fly ash, in particular to a water purifying agent produced by using fly ash as the main raw material of solid waste discharged from thermal power plants. The water purifying agent is mainly used for purification treatment of industrial water, industrial waste water, domestic sewage and drinking water. Background technique: [0002] Some scientific research institutions in my country have studied the project of preparing polyaluminum ferric chloride (PAFC) based on fly ash. During the acid dissolution reaction process, due to the difficulty in opening the silicon-aluminum bond in fly ash, the amount of hydrochloric acid is large, and the dissolution rate of aluminum is low. Low, the production cost of adding calcium aluminate powder is high, and the economic performance of the product is poor, which is not conducive to the implementat...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 王贵明吴世华王贵生
Owner 王贵明
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