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Method for using device for desalting and purifying sewage through refrigeration and centrifugation

A technology of purification device and refrigerated centrifugation, which is applied in the field of environmental engineering to achieve the effects of simple device, low energy consumption and avoiding low water production

Inactive Publication Date: 2012-12-26
TIANJIN ACADEMY OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water quality of the above two kinds of desalinated water cannot meet the needs of production and domestic applications, because during the cooling process, the salt water has no time to discharge the ice body and the high-concentration salt water wrapped in it causes the salt content in the desalinated water to be high. Therefore, it is necessary to combine it with other Methods to further remove the brine in ice crystals, these methods mainly include centrifugation, thawing, washing, extrusion, reverse osmosis, distillation, etc., so that high-concentration brine can be easily discharged from ice crystals to reduce the salt content of sea ice content, and finally obtain high-quality fresh water

Method used

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  • Method for using device for desalting and purifying sewage through refrigeration and centrifugation

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Effect test

Embodiment 1

[0028] Composition and use method of refrigerated centrifugal sewage desalination and purification device

[0029] (1) A device for desalination and purification of refrigerated centrifugal sewage, comprising a water inlet system, an air-conditioning refrigeration system, a drum ice production system and an ice cube separation and collection system. The water inlet system consists of a pre-cooling water tank (1), a submersible pump (2) and a perforated spray pipe (3). The cold water tank (1) is connected to the perforated spray pipe (3) through pipes; the air conditioning and refrigeration system consists of a compressor (5), a condenser (6), a throttle valve (7), an evaporator (8) and a low temperature temperature The sensor (9) is composed, the evaporator (8) is wound on the insulating layer (11) of the inner cylinder (10), and the low temperature temperature sensor (9) is located between the inner cylinder (10) and the outer rotating cylinder (12); The rotating drum ice pr...

Embodiment 2

[0033] The seawater desalination test is carried out by using the device of the invention. The seawater is collected from the Bohai Bay, and the seawater salinity is 32.08. After the seawater is processed by the frozen centrifugal desalination device, the water quality of the incoming and outgoing water is monitored. The results show that the system can remove the salinity in the seawater. The removal rate of algae in seawater is 93.82%, and the removal rate of algae in seawater is 62.50%. After treatment, various indicators such as salt content in the desalinated water can meet the water quality standards for farmland irrigation, and can meet the requirements of agricultural irrigation and industrial production water.

Embodiment 3

[0035] The RO (reverse osmosis) concentrated water desalination test is carried out by using the device of the present invention. The RO concentrated water is taken from a steel plant in Tianjin with a salinity of 11.25. It shows that the system can remove 91.56% of the salinity in the RO concentrated water, and the salinity index in the desalinated water after treatment reaches the water quality standard for farmland irrigation, which can meet the water requirements for agricultural irrigation and industrial production.

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Abstract

The invention discloses a method for desalting and purifying sewage through refrigeration and centrifugation and a device thereof. The device consists of a water inlet system, an air-conditioning refrigeration system, a rotating cylinder ice production system, and an ice cube separation and collection system, wherein the water inlet system consists of a pre-cooling water tank, a submersible pump and a perforated spray pipe; the air-conditioning refrigeration system consists of a compressor, a condenser, a throttle valve and an evaporator; the rotating cylinder ice production system comprises an internal cylinder, an external rotating cylinder and a transmission system consisting of a variable-frequency adjustable-speed motor and a frequency converter; and the ice cube separation and collection system consists of a scraping knife, a square bucket, a screen and a centrifugal machine. The purification device can ensure that the removal rate of salinity in the sewage reaches between 80 and 96 percent and the removal rate of algae is kept between 35 and 70 percent. The method in which the sewage is desalted by adopting the device for desalting and purifying the sewage through refrigeration and centrifugation is suitable for large-scale continuous production; the production energy consumption is low; and the method and the device are widely applied to seawater desalination, strong water desalination and sewage purification in the future.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and relates to sewage desalination and purification technology, in particular to a method for desalination of sea water, RO concentrated water desalination and sewage purification, more specifically a method for desalination and purification of refrigerated centrifugal sewage and a device thereof. Background technique [0002] With the changes of the world environment, the increase of population, the acceleration of urbanization, the aggravation of industrial and agricultural pollution, and the improvement of people's living standards, the entire world today is faced with a serious shortage of freshwater resources. China is one of the thirteen water-poor countries in the world, and its per capita water resources are only 1 / 4 of the world's. The shortage of freshwater resources has become a bottleneck restricting the development of my country's national economy and the improvement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/22
CPCY02A20/124
Inventor 孙贻超袁敏刘红磊刘雄邵晓龙于丹张征云
Owner TIANJIN ACADEMY OF ENVIRONMENTAL SCI
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