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Method for recycling cane sugar factory boiler ash sluicing water

A technology for sugar cane and water resources, applied in chemical instruments and methods, using physical methods for purification, lime production, etc., can solve problems that do not involve active ash and slag, achieve green recycling of resources, ensure the quality of sugar, The effect of protecting the ecological environment

Active Publication Date: 2015-11-18
广东省科学院生物与医学工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current technology does not involve the method of using the ash in the ash water of the boiler of the sugarcane sugar factory to prepare the active ash and apply it to clarify the crude sugar solution

Method used

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  • Method for recycling cane sugar factory boiler ash sluicing water
  • Method for recycling cane sugar factory boiler ash sluicing water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 1.0m 3 The solid-liquid mixed sugarcane sugar factory boiler ash flushing water is separated by a filter-type continuous centrifuge with a screen aperture of 12,500 meshes to obtain filtrate and ash. The filtrate is recycled to the boiler for ash flushing. Fluidized bed drying, the dry ash obtained after drying has a water content of 19±1%; the obtained dry ash is put into an activation furnace, and under the conditions of a microwave power of 200W and a reaction temperature of 800°C, water vapor is used as an activator Activate for 10 minutes to obtain active ash, which is detected by a focused beam reflectometer (FBRM). The crude sugar solution treated by floating technology is mixed according to the mass ratio of 1:10, stirred for 55 minutes under the condition that the temperature of the mixed solution is 50°C and the pH value is adjusted by adding milk of lime to 7.5, and then filtered, and the filtrated clear liquid is collected, and the retained adsorption c...

Embodiment 2

[0023] Take 1.0m 3 The ash water from the boiler of the sugarcane sugar factory mixed with solid and liquid is separated by a filter-type continuous centrifuge with a screen aperture of 800 meshes to obtain filtrate and ash. Vibrating fluidized bed drying, the dry ash obtained after drying has a water content of 15±1%; put the obtained dry ash into an activation furnace, and activate it with water vapor under the conditions of a microwave power of 600W and a reaction temperature of 900°C The active ash was activated for 60min to obtain the active ash, which was detected by a focused beam reflectance measuring instrument (FBRM), and the main distribution range was 1-1000 μm; Mix at a mass ratio of 1:2000, stir for 15 minutes under the condition that the temperature of the mixed solution is 95° C. and add milk of lime to adjust the pH to 7.0, filter, collect the filtrated clear liquid, and the retained adsorption contains 11% organic matter by mass fraction (the main component i...

Embodiment 3

[0025] Take 1.0m 3 The ash water from the boiler of the sugarcane sugar factory mixed with solid and liquid is separated by a filter-type continuous centrifuge with a screen aperture of 250 meshes to obtain filtrate and ash. Vibrating fluidized bed drying, the water content of the dry ash obtained after drying is less than or equal to 20%; put the obtained dry ash into the activation furnace, and use carbon dioxide as the activation furnace under the conditions of microwave power of 900W and reaction temperature of 950°C The active ash was activated for 300min to obtain the active ash, which was detected by a focused beam reflectance measuring instrument (FBRM), and the main distribution range was 1-1000 μm; Mix at a mass ratio of 1:200, stir for 25 minutes under the condition that the temperature of the mixed solution is 65° C. and add milk of lime to adjust the pH to 7.2, filter, collect the filtered clear liquid, and the retained adsorption contains 11.5% organic matter by ...

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Abstract

The invention discloses a method for recycling cane sugar factory boiler ash sluicing water. The method comprises steps as follows: firstly, a solid-liquid mixture in the cane sugar factory boiler ash sluicing water is separated by a filter type continuous centrifuge, a filtrate and ash are obtained, the filtrate is recycled to sluice ash in a boiler, collected and entrapped ash is dried and then subjected to microwave-assisted activation treatment, activated ash is obtained and mixed with a raw sugar liquid, stirring is performed under conditions that the temperature of a mixed solution system is 50-95 DEG C and the pH value is adjusted to 6.5-7.5 through addition of lime milk, filtration is performed, and a filtered clear liquid and an ash filter cake entrapped to be used as fertilizer are obtained. According to the method, the ash in the waste cane sugar factory boiler ash sluicing water is used as a raw material, rational resource utilization and environmental protection are facilitated, a prepared activated ash particle product is high in quality, an application of the product is organically combined with a continuous sugar production decoloring technology, a sugar liquid can be effectively clarified, and the method has the good economic benefit, social benefit and ecological benefit.

Description

technical field [0001] The present invention relates to boiler ash flushing water in a sugarcane sugar factory, in particular to a method for resource utilization of boiler ash flushing water in a sugarcane sugar factory, in particular to a method for preparing active ash from ash flushing water in a sugarcane sugar factory boiler and its application The invention relates to a method for cleaning crude sugar liquid; it belongs to the solid waste recycling treatment technology and the preparation of active ash material and application fields. Background technique [0002] Bagasse is the main by-product of sugar cane mills and is an important renewable biological resource. Due to the high degree of lignification of bagasse, sugar factory boilers mainly burn bagasse to provide energy for the sugar factory. In order to avoid air pollution caused by the burning of bagasse and a large amount of ash and other solid particles entrained in the flue gas of the boiler, a water film du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/12C13B20/02C13B20/16C02F1/00C02F1/38B01J20/20B01J20/30
CPCY02P40/40
Inventor 黄向阳许广球张平军高俊永黄廷冠莫柳珍孙潇谢武装陆金杨欢梁波
Owner 广东省科学院生物与医学工程研究所
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