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Process for producing polyaluminum ferric chloride by gasifier ash

A technology of polyaluminium-ferric chloride and gasifier ash, which is applied in iron halides, chemical instruments and methods, water/sewage treatment, etc., and can solve the problems of low COD removal rate, low product yield, and product sewage treatment. Low turbidity removal rate and other problems, to achieve the effect of saving raw materials, low reaction temperature, and energy saving

Inactive Publication Date: 2016-12-21
潍坊中清精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. The turbidity removal rate of product sewage treatment is low; 2. The COD removal rate of product sewage treatment is low; 3. The product yield is low

Method used

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  • Process for producing polyaluminum ferric chloride by gasifier ash
  • Process for producing polyaluminum ferric chloride by gasifier ash
  • Process for producing polyaluminum ferric chloride by gasifier ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 A process for producing polyaluminum ferric chloride by utilizing gasifier ash slag

[0036] Step 1 raw material selection

[0037] The raw material adopted is the gasifier ash slag discarded by the chemical plant, and the composition of the gasifier ash slag is shown in Table 1:

[0038] Table 1 Composition of gasifier ash

[0039]

[0040] After drying the gasifier ash, grind it into 80-mesh powder for later use.

[0041] Step 2 Leach

[0042] Add gasifier ash powder into water, add 50g ash powder per liter of water, heat to 45°C, keep for 15 minutes, stir at 2200rpm for 30min, let it stand for 4 hours, pass through a pressure filter device at a passing speed of 480L / min , the pressure is 0.5 MPa, and the filter residue is collected.

[0043] Step 3 pickling

[0044] The filter residue is dropped into the reactor, and the acid solution is added in the reactor, and the mass ratio of the filter residue and the acid solution is 31:77;

[0045] The acid...

Embodiment 2

[0052] Example 2 Single factor analysis experiment of pig liver slurry addition

[0053] Adopt the technology of embodiment 1, only change the addition amount of pig liver slurry in the pickling step and carry out embodiment 2-5; The addition amount of pig liver slurry adopted in embodiment 2-5 is shown in Table 2;

[0054] The pig liver slurry addition amount that adopts in the embodiment 2-5 of table 2

[0055]

[0056] The yield of the polyaluminum ferric chloride solid product prepared by the technique of Embodiment 1-5 is shown in Table 3;

[0057] Table 3 The yield of polyaluminum ferric chloride solid product

[0058]

[0059] It can be seen from Tables 2 and 3 that the pig liver slurry added in the pickling step is preferably 1 / 8 of the filter residue quality.

Embodiment 6

[0060] Embodiment 6 reaction temperature single factor analysis experiment

[0061] Adopt the technology of embodiment 1, only change the reaction temperature in the pickling step and carry out embodiment 6-9; The reaction temperature that adopts among the embodiment 6-9 is shown in Table 4;

[0062] The reaction temperature that adopts in the embodiment 6-9 of table 4

[0063]

[0064] The polyaluminum ferric chloride solid product prepared by the process of Example 6-9 is used as a coagulant to detect sewage treatment performance;

[0065] The test results are shown in Table 5;

[0066] Table 5 adopts the coagulant of embodiment 6-9 to carry out sewage treatment result

[0067]

[0068] It can be seen from Tables 4 and 5 that the reaction temperature is preferably 78°C.

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Abstract

The invention provides a process for producing polyaluminum ferric chloride by gasifier ash. The process comprises the steps of raw material selection, leaching, acid washing, solid-liquid separation and drying and crystallization. The raw materials are gasifier ash. In the acid washing step, the mass ratio of the filtering slag to the acid liquid is 31:77; pig liver pulp is added into a reaction kettle; the addition of the pig liver pulp is 1 / 10 to 1 / 6 of the mass of the filter slag; the reaction temperature is 75 to 80 DEG C; the reaction time is 30min; the drying temperature is 42 to 50 DEG C. The process for producing polyaluminum ferric chloride by gasifier ash has the advantage that the product yield is 96.5 to 99.5 percent.

Description

technical field [0001] The invention relates to a process for producing polyaluminum ferric chloride, in particular to a process for producing polyaluminum ferric chloride by utilizing ash slag of a gasification furnace, and belongs to the technical field of inorganic polymer preparation. Background technique [0002] Polyaluminum ferric chloride (PAFC) is an inorganic polymer coagulant formed by the coagulation and hydrolysis of aluminum and iron salts. According to the principle of synergy, polyaluminum ferric chloride is added A new type of high-efficiency coagulant prepared by compounding iron compounds. [0003] It integrates the respective advantages of aluminum salt and iron salt, significantly improves the morphology of aluminum ions and iron ions, and greatly improves the degree of polymerization. Take advantage of aluminum and iron coagulants for air flotation operation to improve the coagulation performance of polyaluminium chloride; the purification treatment ef...

Claims

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Application Information

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IPC IPC(8): C01G49/10C02F1/52
CPCC01G49/10C02F1/5245
Inventor 张国礼张慧吴晓梅
Owner 潍坊中清精细化工有限公司
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