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Method for utilizing recycled water in sugar manufacturing industry

A reclaimed water and industrial technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve high production costs, affect the efficiency and life of condensers, waste of water resources, etc. problems, to reduce maintenance costs, prevent clogging, and save water resources

Active Publication Date: 2012-12-05
长治市金泽生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems that the current circulating water in the sugar industry mostly uses tap water or well water to easily form scale, which affects the service efficiency and life of the condenser, causes waste of water resources, and increases production costs. , Sugar industry reclaimed water utilization method that is not easy to form scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A method for utilizing recycled water in the sugar industry, comprising the following steps:

[0013] 1) Use a centrifugal pump to pump the sewage into the multi-media filter for filtration, and the filtered water enters the water production pool, and then pumps the water in the water production pool into the ultrafiltration membrane for ultrafiltration through the centrifugal pump of the water production pool, and the ultrafiltered water enters the reverse osmosis The membrane is filtered again, and the filtered water enters the clear water tank to make recycled water;

[0014] 2) When the regenerated water is pumped into the cooling tower and cooled to a temperature of 24°C, it is transported to the heat exchange system by a vertical pipeline pump. When the water temperature reaches 42°C, it is returned to the cooling tower for recooling before use;

[0015] The pore size of the ultrafiltration membrane is 1nm, and the water output is 108.5m 3 / h, sludge index ≤ 3, t...

Embodiment 2

[0018] A method for utilizing recycled water in the sugar industry, comprising the following steps:

[0019] 1) Use a centrifugal pump to pump the sewage into the multi-media filter for filtration, and the filtered water enters the water production pool, and then pumps the water in the water production pool into the ultrafiltration membrane for ultrafiltration through the centrifugal pump of the water production pool, and the ultrafiltered water enters the reverse osmosis The membrane is filtered again, and the filtered water enters the clear water tank to make recycled water;

[0020] 2) When the regenerated water is pumped into the cooling tower to cool to a temperature of 25°C, it is transported to the heat exchange system by a vertical pipeline pump. When the water temperature reaches 43°C, it is returned to the cooling tower to be cooled again before use;

[0021] The pore size of the ultrafiltration membrane is 1nm, and the water output is 108.5m 3 / h, sludge index ≤ 3,...

Embodiment 3

[0024] A method for utilizing recycled water in the sugar industry, comprising the following steps:

[0025] 1) Use a centrifugal pump to pump the sewage into the multi-media filter for filtration, and the filtered water enters the water production pool, and then pumps the water in the water production pool into the ultrafiltration membrane for ultrafiltration through the centrifugal pump of the water production pool, and the ultrafiltered water enters the reverse osmosis The membrane is filtered again, and the filtered water enters the clear water tank to make recycled water;

[0026] 2) When the regenerated water is pumped into the cooling tower to cool to a temperature of 27°C, it is transported to the heat exchange system by a vertical pipeline pump. When the water temperature reaches 45°C, it is returned to the cooling tower to be cooled again before use;

[0027] The pore size of the ultrafiltration membrane is 1nm, and the water output is 108.5m 3 / h, sludge index ≤ 3,...

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Abstract

The invention relates to a method for recycling sewage in sugar manufacturing industry, belonging to the technical field of sewage recycling. The invention mainly solves the technical problems of influenced use efficiency and service life of a condenser, water resource waste and production cost increase because scales are easily formed by mostly adopting tap water or well water as circulating water in the traditional sugar manufacturing industry. In the technical scheme provided by the invention, the method comprises the following steps of: (1) pumping sewage into a multi-medium filter by adopting a centrifugal pump, filtering, leading the filtered water to enter a water producing tank, pumping the water in the water producing tank into an ultrafiltration membrane for ultrafiltration, through the centrifugal pump of the water producing tank, leading the water subjected to ultrafiltration to enter a reverse osmosis membrane for filtration again and leading the filtered water to enter aclean water pool to prepare recycled water; and (2) pumping the recycled water into a cooling tower for cooling, then, conveying the cooled recycled water to a heat exchange system by adopting a vertical pipeline pump and leading the recycled to return to the cooling tower for recooling for later use when the water temperature reaches 42-45 DEG C. The method provided by the invention is beneficial to prevention of tube nest blockage, reduction of maintenance cost, saving of water resources and decrease of production cost.

Description

technical field [0001] The invention relates to a water reuse method in the sugar industry, belonging to the technical field of sewage recycling. Background technique [0002] Reclaimed water mainly refers to non-drinking water that can be reused within a certain range after urban sewage and factory wastewater have been treated to meet certain water quality standards. Reclaimed water is currently an important way to save water and prevent and control water pollution, and it is also an environmental protection technology that is promoted in my country. At present, in the sugar industry, tap water or well water is mainly used as circulating water. The total hardness (calculated as CaCO3) of tap water and well water is 450mg / L; the conductivity is ≥100us / cm. Due to the high hardness of the water quality, the circulating water is running During the process, the deposits accumulated on the surface of the heat exchanger form dense scale, which will affect the heat transfer effici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F1/44
Inventor 徐建凯王炳德李士军王鹏飞
Owner 长治市金泽生物工程有限公司