Novel technique for quality-preservation treatment of sugar plant circulation cooling water

A technology of circulating cooling water and new technology, applied in water/sewage treatment, food industry wastewater treatment, heating water/sewage treatment, etc., can solve the problems of long-term recycling, acid and odor of circulating water, zero water intake and zero discharge, etc. , to achieve the effect of ensuring long-term recycling, improving water quality and low operating costs

Inactive Publication Date: 2008-05-21
广西工院糖业科技有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method that can solve the problem that the concentration of circulating cooling water in existing sugar factories increases after repeated circulation in the circulating pool, making the circulating water sour and smelly, and the problem that it cannot be recycled for a long time
[0008] In order to achieve the above-mentioned purpose, the present invention adopts a new tec

Method used

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  • Novel technique for quality-preservation treatment of sugar plant circulation cooling water

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Experimental program
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Effect test

Embodiment 1

[0028]The mixed condensate water at about 90°C enters the plate heat exchanger 1, and the temperature drops after the heat exchange, and then enters the cooling tower 2 to continue cooling down, cools down to about 30°C, and enters the circulating water pool 4 as a supplementary water source for cooling water in the circulating water pool; The secondary juice vapor condensed water flowing out from the condenser 3 enters the circulating water pool 4 together with the cooling water, adds lime water or lime milk to make it reach neutrality (between pH about 7-7.5), and then enters the cooling tower 2 to cool to At about 30°C, it enters the circulating pool 4 for recycling; part of it passes through the ultrafiltration system 5 to remove suspended solids, microorganisms, and colloids, and then enters the heat exchanger 1 to heat up to about 65°C and send it to be squeezed as permeated water, and part of it can be used for other processes Water is used to lead out of the circulating...

Embodiment 2

[0030] The mixed condensate water at about 90°C enters the spiral plate heat exchanger 1, the temperature drops after the heat exchange, and then enters the cooling tower 2 to continue to cool down, cools down to about 30°C, and enters the circulating water pool 4 as a supplementary water source for cooling water in the circulating water pool ; The secondary juice vapor condensed water flowing out from the condenser 3 enters the circulating water pool 4 together with the cooling water, adds milk of lime or lime water to make it reach neutrality (between PH about 7-7.5), and then enters the cooling tower 2 for cooling When the temperature is about 30°C, it enters the circulating pool 4 for recycling; part of it passes through the ultrafiltration system 5 to remove suspended solids, microorganisms, and colloids, and then enters the spiral heat exchanger 1 to heat up to about 65°C and send it to be squeezed as permeated water, and part of it can be used as Other process water is d...

Embodiment 3

[0032] The secondary juice vapor condensed water flowing out from the condenser 3 enters the circulating water pool 4 together with the cooling water, adds milk of lime or lime water to make it reach neutrality (between pH about 7-7.5), and then enters the cooling tower 2 to cool to At about 30°C, it enters the circulating water pool 4 for recycling; part of the cooling water that has been circulated many times enters the boiler water film dust removal and ash flushing system 6, kills microorganisms at high temperature, and removes part of the colloid and sugar by the adsorption of ash. Then go through the sediment tank 7 and the filter system 8 to remove suspended solids and ash, then enter the cooling tower 2 to cool to about 30°C, and replenish the circulating cooling water; part of the circulating cooling water can also be used for other purposes, leading to the circulating water pool 4 to This promotes the rotation of circulating cooling water and improves the water qualit...

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Abstract

The invention relates to a treatment technology and equipment of circulating cooling water of a sugar factory juice steam condensing system. The technology process includes steps as follows: firstly, pH value of the circulating cooling water is regulated to be neutralized through alkaline materials; secondly, circulating water in a circulating a circulating water tank is rotated; the third step is to cool mixed steam condensing water after fetching a part of heat and supplement the circulating water in the circulating water tank; and fourthly, a part of the cooling water which has circulated for many times is heated to be at the temperature of about 65 degree Celsius after being filtered through an ultra-filtration membrane system and is sent to the press to be used as pressing infiltration water, or a part of the cooling water which has circulated for many times is sent to a boiler to be used as ash water, and the circulating water is recharged again through the settlement and the filtration. The equipment includes the circulating water tank, a cooling tower, a condenser, the ultra-filtration system, a heat exchanger, a boiler water membrane dust removing and ash sluicing system and a sediment pool. The invention can ensure the circulating cooling water to be not metamorphic and stink. The mixed steam condensing water and the part of the cooling water which has circulated for many times are ensured to be utilized reasonably. A large quantity of production water is saved for sugar manufacturing factories. No sewage is discharged. The investment is saved. And the invention has the advantages of low operating cost and stable operation.

Description

technical field [0001] The invention relates to an improvement of a sugar making process, in particular to a treatment method for circulating cooling water of a juice vapor condensation system in a sugar factory. Background technique [0002] The vacuum condensing system of the sugar factory needs a large amount of cooling water. In order to save water and reduce emissions, the cooling water must be recycled. Condensed water due to evaporation and boiled sugar contains trace amounts of SO 2 (dissolved in water to form sulfurous acid) and a small amount of sugar, and brought into the circulating cooling water, so that the concentration of the circulating cooling water increases after repeated cycles in the circulating pool. At a certain temperature, the circulating cooling water becomes sour and smelly, and cannot be circulated for a long time use. At present, most sugar factories extract a large amount of low-temperature raw water, and rotate the circulating cooling water ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/66C02F1/44C02F1/28C02F1/02C02F1/58C02F103/32
Inventor 钮德明
Owner 广西工院糖业科技有限责任公司
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