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

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 ...

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 technology for quality assurance treatment of circulating cooling water in sugar factories, which can solve the problem of zero water intake and zero discharge in sugar factories. For this reason, it is necessary to improve the water quality of circulating cooling water to ensure that the circulating water circulates for a long time without corruption. Smelly, forming an independent closed circulating water system that does not drain

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