Ceramic membrane processing device for treating oily wastewater

Inorganic ceramic membrane technology for treating COD / oily wastewater

Technical name Inorganic membrane treatment of oily wastewater

Technical Overview The development of inorganic membrane separators based on digestion and absorption of inorganic membrane separation technology is a high-tech product. Its instantaneous online recoil technology and device sealing technology are unique. The technical level has reached the domestic leading level.
The membrane separator is used for the treatment of wastewater. It passed the inspection of the Provincial Health and Epidemic Prevention Station and was tested by the Provincial Product Quality Supervision and Inspection Institute. Its technical performance meets the Q / DAXC002-2000 enterprise standard.
Inorganic membrane separators have been successfully used in the treatment of production wastewater in the coking industry. For example, when applied to the Shijiazhuang Coking Group project, the user responded that the equipment not only solves the problem of wastewater discharge compliance, effectively removes the higher COD in the working wastewater, but also can recover oil with economic value in the wastewater. The device has stable operation, simple operation, high degree of automation and low operation cost.

1. Basic principles

Separation technology is a new type of highly efficient and precise separation technology successfully developed in the 20th century. It uses a screening machine

According to the characteristics of the solution and the size of the molecules, filtration and separation are carried out. Oil and water are very special substances. Water has strong polarity. Oil is a simple hydrocarbon and a non-polar hydrophobic substance. However, due to various reasons, they are often mixed with chemical substances such as surfactants and become difficult to handle. Oil water system. Among them, typical emulsified oil and dissolved oil have small oil droplets and complicated surface properties. However, due to their physical and chemical properties, such as hydrophilicity and charging, the inorganic film makes the emulsified oil blocked by the film based on the oil droplet size, and the dissolved oil is based on The molecular interaction between the membrane and the solute is prevented by the membrane, so that the oil-water system can be separated and purified.

Second, the technical key

The key to the treatment of oily wastewater by mechanical membrane separation technology is the rational selection of membranes, because any filter or filter element may be contaminated and cause clogging. Hebei Ruitong Meibang Engineering Co., Ltd. applies inorganic membranes. It is suitable for use under high pressure, high temperature, high viscosity, high solids content and harsh pH conditions. The core of its separation is a membrane using nano-scale materials, with ceramic as the support. The manufactured inorganic ceramic membrane tube is used in the membrane separator for oil-water separation. At the same time, using the instant online recoil technology, membrane cleaning technology, sealing technology independently researched and developed by our company, it is aimed at the treatment of various industrial wastewater and domestic wastewater, such as petrochemical smelting wastewater, oilfield produced wastewater, edible oil and alkali refining washing wastewater Mechanical processing of floating liquid, medical wastewater, woolen chemical fiber, leather wastewater, domestic sewage, etc., has achieved good results and has been well received by users.

Scope of application

Petrochemical / smelting wastewater, oilfield produced wastewater, edible oil-alkali refining and washing wastewater, mechanical processing floatation liquid, pharmaceutical wastewater, woolen chemical fiber, leather wastewater, domestic sewage, etc.

Three, technical indicators

project

Oil (mg / L)

COD (mg / L)

Membrane separator inlet wastewater

874-37036

4486.3-31418.37

Permeate outlet of membrane separator

＜ 30

＜ 600

Membrane separator outlet concentrate

6963.5-26775.2

1173.92-729400

Discharged liquid after biochemical treatment

＜ 30

＜ 200

4. Requirements

For separation, the processing capacity (membrane flux) is greatly affected by the temperature of the stock solution. The temperature range is preferably 40 degrees to 70 degrees. Only a simple pre-filtration is required, and a 60-mesh stainless steel wire mesh is sufficient.

V. Main equipment and operation management

Major equipment

Membrane equipment processing part: raw material tank, circulating liquid storage tank, inorganic membrane separator, cleaning liquid tank

Control system biochemical equipment processing part: hydrolysis acidification tank, biochemical reaction tank, sand filter tank

Sixth, operation management

Can realize fully automatic computer control / semi-automatic computer control / manual control

7. Environmental benefit analysis

After the surgical treatment, the oil retention rate reached more than 98%, and the COD removal rate reached more than 90%, which reduced the load of subsequent biochemical treatment, thereby reducing the investment and operating costs of the subsequent treatment. Secondary pollution, achieve cleaner production, protect the surrounding ecological environment, reduce environmental disputes, and recover high value-added oil, which has good economic and environmental benefits.