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Multi-stage membrane concentration oily wastewater device

A membrane concentration and waste water technology, applied in the field of petrochemical industry, can solve the problems of water resource pollution, waste of petroleum resources, etc., and achieve the effect of increasing membrane flux and prolonging service life

Pending Publication Date: 2021-07-23
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of existing technologies, the present invention provides a multi-stage membrane device for concentrating oily wastewater, which realizes the concentration of oil in oily wastewater, and also realizes the purification treatment of water, and at the same time solves the problem of water resource pollution and oil pollution. The problem of wasting resources

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] The multi-stage membrane concentrated oil wastewater apparatus, working principle and procedure are described below: Oil wastewater enters (1) in the sewage water pipe, precipitate some of the heavier substances in the oil-containing wastewater, and then pass (2) Pressure pump extraction (1) The supernatant in the precipitated tank. The operation steps of the nanofiltration system are as follows: Open the valves F1, F6, F12, F13, F15, the remaining valves are closed, the supernatant passes through the valve F1 into (3) nanofiltration membrane, removes a large amount of water and low-priced molecular solute , The oil in the supernatant, (10) pressure gauge measuring (3) nanofiltration membrane outlet pressure and inlet pressure, (11) flow meter measurement (3) The inlet flow rate and outlet flow of nanofiltration membranes, obtained after treatment The concentrate passes through the pipe F6 into (8) concentrated liquid storage pool, and the permeate passes through the valve ...

Embodiment 2

[0024] Nonofiltration - Ultrafiltration System The operation steps are as follows: Open the valves F1, F2, F8, F12, F13, F15, F20, the remaining valves close, the supernatant passes through the pipe through the valve F1 into (3) nanofiltration membrane, remove a large amount of water As well as low-priced small molecular solutes, concentrated oils, (10) pressure gauge measuring (3) nation filter outlet pressure and import pressure, (11) flow meter measurement (3) Nate the imported flow and outlet of nation filter Flow, the concentrate obtained after treatment enters (4) ultrafiltration membranes via the valve F2, and the permeation liquid enters (7) osmotic storage pool through valve F12, F13, F15. The concentrate was removed by (4) ultrafiltration membrane to remove water and a small amount of small molecular material, further concentrating the oil in the concentrate, (10) pressure gauge measuring (4) ultrafiltration membrane outlet pressure and import pressure, (11) flow Measure...

Embodiment 3

[0026]Nonofiltration-microfiltration system operation steps are as follows: Open the valves F1, F7, F9, F3, F4, F12, F13, F21, F15, and the remaining valves are closed, the supernatant passes (3) nanofiltration membranes via the valve F1 through the pipe. Remove large amounts of water and low-cost small molecular solute, concentrate oil in the supernatant, (10) pressure gauge measuring (3) Nate filter outlet pressure and inlet pressure, (11) flow meter measurement (3) nanofiltration membrane Inlet flow and export flow, the concentrate obtained after treatment passes through the valve F7, F9, F3 into (5) microfiltration membranes, and the permeation liquid is entered (7) osmotic storage pool through valve F12, F13, F15. The concentrate was removed by (5) microfiltration membrane removal of water, a small amount of small molecule solute and macromolecular solute, further concentrating the oil in the concentrate, (10) pressure gauge measuring (5) microfiltration membrane outlet press...

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Abstract

Oily wastewater is wide in source, if the oily wastewater does not reach the discharge standard, the environmental ecology can be seriously destroyed, meanwhile, energy resources are wasted, and it can be generally guaranteed that penetrating fluid reaches the related discharge standard when the oily wastewater is treated through a membrane separation technology. However, the problems of water resource pollution and petroleum resource waste which are simultaneously solved by utilizing the membrane separation technology are rarely reported. The invention discloses a multi-stage membrane concentration oily wastewater device which can simultaneously solve the problems of water resource pollution and petroleum resource waste through a multi-stage membrane concentration system integrated with nanofiltration, ultrafiltration and microfiltration membrane processes. The multi-stage membrane concentration device comprises a concentration system and a backwashing system, and the concentration system can effectively separate oil and water in the oily wastewater so that the concentration of the oil in the oily wastewater is realized, and the purification treatment of the water is also realized; and the backwashing system is used for cleaning the separation membrane after the concentration is finished so that the service life of the membrane is prolonged.

Description

Technical field [0001] The present invention relates to the field of petrochemical technology, in particular a multi-stage membrane concentrated oil wastewater device. Background technique [0002] Oil-containing wastewater mainly refers to the wastewater of oil-containing substances discharged from industrial production. Usually we divided the oil in the oil-containing wastewater according to the shape of the oil in the water and its particle size, which is dissolved oil, emulsified oil, dispersion oil, and floating oil (free travel). The oil-beaded diameter of the flakes is large, typically greater than 150 μm, which is easy to float in the water to form an oil film or oil layer. The oil-beaded particle diameter of the dispersion oil is between 20 and 150 μm. This is usually added to the surfactant between 20-150 μm. It is difficult to poly, which is difficult to poly, which is conventional settling method, which is very dynamic, and it is difficult for such dispersion. Effecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44B01D65/02
CPCC02F1/442C02F1/444B01D65/02B01D2321/04C02F2301/08
Inventor 李桂水洪逸斌陈皓李煜李文祥王庆港
Owner TIANJIN UNIV OF SCI & TECH
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