Method of producing lime by microwave heating calcined filter mud of sugar factory

A sugar factory filter sludge and microwave technology, which is applied in the direction of pyrolysis treatment of sludge, calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of easy hardening, polluting the environment, high alkalinity, etc., and reduce environmental pollution , the effect of improving economic efficiency

Inactive Publication Date: 2011-12-21
周少基
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sugar factory filter mud is the waste produced in the process of producing sucrose in the sugar industry. The sugar factory produced by the carbonic acid process mainly contains basic calcium carbonate besides a large amount of organic matter, because of its high alkalinity and easy corruption , Easy to harden and pollute the environment. Each sugar factory has millions of tons per year. Since there is no comprehensive utilization, most of them are disposed of by landfill, which wastes resources and produces secondary pollution problems.
So far there is no proper way to deal with

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1 Put 25 grams of carbonic acid sugar factory filter mud into an alumina crucible and place it in a microwave reactor, heat the filter mud to 980°C with a microwave with an output power of 1000W, keep it warm at this temperature for 20 minutes, and turn off the microwave Heat the switch, cool down to room temperature naturally, and obtain a white product. The product is dissolved in water, and except for a small amount of precipitated particles, the rest produces milk of lime.

Embodiment 2

[0012] Example 2 Dry the carbonation sugar factory filter mud with a drier to a water content of 15%, take 20 grams of the filter mud and mix it with 5 grams of coke powder, put it into an alumina crucible and compact it slightly, and place it in a microwave reactor In the process, the filter sludge was heated to 1000°C with a microwave with an output power of 1000W, kept at this temperature for 5 minutes, the microwave heating switch was turned off, and the product was naturally cooled to room temperature to obtain a white product.

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PUM

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Abstract

The invention discloses a method for producing lime by using microwave calcining carbonation method sugar factory filter mud. Mix the carbonation sugar factory filter sludge directly or with a certain amount of coke and other carbon source fuels, put it into an alumina crucible and place it in a microwave reactor, heat the filter sludge to 500-1200°C with microwaves, and keep it warm at this temperature After 1-30 minutes, turn off the microwave heating switch, cool naturally to room temperature, and obtain a lime product mainly containing calcium oxide. Its advantage is that the waste filter mud of carbonic acid sugar factory is used as raw material and calcined at high temperature to obtain lime and kiln gas containing carbon dioxide, which can be reused in sugar production and turn waste into treasure.

Description

technical field [0001] The invention relates to the recovery and utilization of filter mud, which is one of the three wastes discharged from sugar production, and belongs to the field of resource and environmental protection. Background technique [0002] Large quantities of lime are used in sugar production for the clarification of the sugar juice, during which the lime forms a precipitate which is eventually filtered to form a so-called filter sludge. Sugar factory filter mud is the waste produced in the process of producing sucrose in the sugar industry. The sugar factory produced by the carbonic acid process mainly contains basic calcium carbonate besides a large amount of organic matter, because of its high alkalinity and easy corruption , Easy to harden and pollute the environment. Each sugar factory has millions of tons per year. Since there is no comprehensive utilization, it is mostly disposed of by landfill, which wastes resources and causes secondary pollution. S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/06C01B31/20C02F11/10C01B32/50
Inventor 周少基
Owner 周少基
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