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Filter aid and regeneration method thereof

A filter aid and fly ash technology, applied in the field of filtration, can solve the problems of low utilization level and low utilization efficiency, and achieve the effect of meeting large demand, high value-added application and low price

Active Publication Date: 2013-06-19
中铝山东有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a filter aid, which solves the problems of low utilization level and low utilization efficiency of solid waste pulverized coal and slag produced by coal combustion

Method used

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  • Filter aid and regeneration method thereof
  • Filter aid and regeneration method thereof
  • Filter aid and regeneration method thereof

Examples

Experimental program
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Effect test

example 1

[0024] Prepare the filter aid used for beer filter aid that the embodiment of the present invention provides:

[0025] Fly ash raw materials are removed by magnetic separation and ground into semi-finished products with a thickness of 2-40 μm. Under the conditions of a solid-liquid ratio of 1:10, an acid mass percentage concentration of 0.6%, a temperature of 120° C., a pressure of 1.2 atmospheres, and a time of 60 minutes, the semi-finished product was dissolved and filtered using a hydrochloric acid solution; water, etc.), or rinse with beer solution. The fly ash after dehydration and rinsing is placed at 110° C. and baked to a constant weight to obtain the filter aid provided by the present invention, that is, the fly ash filter aid.

[0026] The purified fly ash is classified and treated, and particles of 2-20um account for 80% of the class particles, and 0.77-1.0 kg of fly ash filter aid is consumed for filtering per ton of beer.

[0027] The regeneration process of fil...

example 2

[0033] Prepare the filter aid that the embodiment of the present invention provides for beer filter aid:

[0034] Fly ash raw materials are removed by magnetic separation and ground into semi-finished products with a thickness of 2-40 μm. In solid-liquid ratio 1: 10, acid mass percent concentration is 0.6%, temperature 120 ℃, pressure 1.2 atmospheric pressure, under the condition of time 60min, use hydrochloric acid solution to dissolve, filter semi-finished product; deionized water, etc.), or rinse with beer solution. The fly ash after dehydration and rinsing is placed at 110° C. and baked to a constant weight to obtain the filter aid provided by the present invention, that is, the fly ash filter aid.

[0035] The purified fly ash is classified and treated, and particles of 2-20um account for 80% of the class particles, and 0.77-1.0 kg of fly ash filter aid is consumed for filtering per ton of beer.

[0036] The regeneration process of the filter aid: the fly ash unloaded o...

example 3

[0042] Preparation of the embodiment of the present invention is used for the filter aid of citric acid fermented liquor filter aid

[0043] Fly ash raw materials are removed by magnetic separation and ground into semi-finished products with a diameter of 40 μm. Under the conditions of a solid-liquid ratio of 1:10, an acid mass percentage concentration of 0.6%, a temperature of 120° C., a pressure of 1.2 atmospheres, and a time of 60 minutes, the semi-finished product was dissolved and filtered using a hydrochloric acid solution; water, etc.), or rinse with a citric acid solution. The fly ash after dehydration and rinsing is placed at 110° C. and baked to a constant weight to obtain the filter aid provided by the present invention, that is, the fly ash filter aid.

[0044] The regeneration process of the filter aid: adopt the regeneration method of the filter aid provided by the present invention, calcinate the used fly ash filter aid at 450°C for 2-5h, and mix the calcined p...

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Abstract

The invention provides a filter aid which comprises coal ash or furnace slag. The coal ash or furnace slag is pretreated, wherein the pretreatment comprises the following steps: performing pickling or alkaline washing on the coal ash or furnace slag, and controlling the acid-base mass percent to be 0.1-0.8 percent; or adding lime, and controlling the lime addition amount to be 0.1-0.5 percent of the weight of the coal ash or furnace slag; or adding salt or base, wherein the addition amount of the salt or base is 0.05-1 percent of the mass of the coal ash or furnace slag; or adding the salt, wherein the addition amount of the salt is 1-10 percent of the mass of the coal ash or furnace slag; and stewing the coal ash or furnace slag in which the salt is added at the temperature of 90-200 DEG C for 1-5 hours under sealing conditions, wherein the salt is heated to generate gas. The filter aid disclosed by the invention takes the coal ash and the furnace slag as raw materials and can be widely applied to the industries of coloring, sugaring, beer, chemical industry and the like.

Description

technical field [0001] The invention relates to the technical field of filtration, in particular to a filter aid and a regeneration method thereof. Background technique [0002] In the Bayer process, lime or lime milk is often added to the crude liquid to aid in the filtration of the crude liquid. Sodium aluminate solution reacts with lime to produce tricalcium aluminate or hydrated garnet, which has the characteristics of high hardness, large particles, loose and porous, which can increase the porosity and air permeability of the filter cake after the crude liquid is filtered, reduce the filtration resistance, and improve capacity of the filter. [0003] With the increasing awareness of protecting mineral resources in various countries, the grade of bauxite currently in use is showing a downward trend, resulting in an increase in the processing load of the red mud separation and sedimentation system, an increase in the content of floating matter in the crude liquid, and a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/34B01D37/02
Inventor 温金德于存贞王延玲高飞李韶辉徐宏刚
Owner 中铝山东有限公司
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