Continuous overflowing type membrane filtering device and method

A membrane filtration and over-flow technology, applied in the field of liquid solute concentration or filtration devices, continuous over-flow membrane filtration devices, can solve the problems of low membrane flux, intensive pressure pump, membrane element pollution, etc. Membrane filtration benefits, high safety and stability

Active Publication Date: 2020-08-14
四川绿沃创新环保工程有限公司
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the process of membrane filtration device mainly adopts batch full circulation filtration process or forced internal circulation continuous filtration process. The device is equipped with a booster pump and multiple forced circulation pumps. These two membrane filtration devices have many problems, among which batch The membrane intercepted substances of the membrane device in the permanent circulation filtration process have been in the circulation tank and the membrane device during the batch operation time. There is no discharge device. Rapid decline, low membrane filtration efficiency; Among them, a large part of the membrane retentate of the forced internal circulation continuous filtration process membrane device will also exist in the forced internal circulation membrane group, resulting in the contamination of the membrane elements in the membrane group by the retentate. The volume drops rapidly, and the membrane filtration efficiency is low; the current membrane filtration device only has a booster pump. As the concentration of the retentate rises, the osmotic pressure of the membrane is required to be higher, and a booster pump cannot provide higher osmotic pressure. Membrane flux is low, and membrane filtration efficiency cannot be exerted
[0004] "Patent 200910129343.7" proposes a multi-stage continuous reverse osmosis membrane concentration system. A booster pump is installed behind each membrane stack to improve membrane filtration efficiency. However, the booster pumps are too dense, and the number of membrane elements in advanced membrane stacks gradually increases. Reduced feed liquid flow rate is too large; and when the feed liquid flow rate is small, the membrane stack cannot be selectively put into operation, and the lower concentration ratio requirement cannot be achieved

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Continuous overflowing type membrane filtering device and method
  • Continuous overflowing type membrane filtering device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a continuous overflow membrane filtration device includes a feed pump 1, a stock solution buffer tank 10, a stock solution tank 11, a concentrated solution tank 12, and a dialysate tank 13, and is characterized in that it includes 2 filter modules connected in series 14. Each filter module 14 includes 2 sections of filter groups 3 connected in series in sequence, and the number of membrane shells in each filter group 3 decreases successively; the filter groups 3 are connected in series through a feeding pipe, and the input ends of each filter module 14 are provided with increasing Press the pump 15, the filtrate output end of each section of the filtration group 3 is connected to the dialysate tank 13 after converging, the thick liquid output end of the second filter module 14 is connected to the concentrated solution tank 12, and the output end of the stock solution tank 11 is connected to the The feed pump 1 is connected to the input end of ...

Embodiment 2

[0039] Such as figure 2 As shown, a continuous membrane concentration device includes a feed pump 1, a stock solution buffer tank 10, a stock solution tank 11, a concentrated solution tank and a dialysate tank 13, and is characterized in that: it includes 3 concentration modules connected in series in sequence, each concentration The module includes 2 sections of filter groups 3 connected in series in sequence, and the number of membrane shells in each filter group 3 decreases successively; the filter groups 3 are connected in series through feeding pipes, and the input ends of each concentration module are provided with a booster pump 15, and each The filtrate output ends of the section filtration group 3 are connected to the dialysate tank 13 after converging, the strong liquid output end of the third concentration module is connected to the concentrate tank, and the output end of the stock solution tank 11 is connected to the input end of the stock solution buffer tank 10, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a continuous overflowing type membrane filtering device and method. By a multi-stage booster pump, segmented pressurization can be effectively carried out on a multi-segment membrane filtration module; the membrane element of each filtering module has proper membrane permeation pressure, the membrane retentate concentrated solution of each filtering module continuously enters the next section of filtering module connected in series until being finally discharged out of the membrane device, the membrane retentate concentrated solution does not circularly flow back any more, and the retentate does not circularly accumulate to pollute the membrane element, so that higher membrane filtering efficiency is obtained. Through bypass arrangement, a working module can be skipped, flexible selection can be achieved according to actual production requirements, and the practicability is high. The booster pump is matched with parameters of pressure monitoring instruments andflow monitoring instruments at all sections to adjust the pressure and the flow and is in linkage adjustment with an electric adjusting valve, pressurization can be accurately carried out, and the continuous overflowing type membrane filtering device is high in safety and stability and has important value in the fields of liquid solute membrane filtration and liquid solute membrane concentration.

Description

technical field [0001] The invention relates to a device and method for concentrating or filtering liquid solutes, in particular to a continuous overflow membrane filtration device, which belongs to the field of concentrating and filtering liquid solutes. Background technique [0002] Membrane separation is a physical process, and its basic principle is to use a membrane with selective permeability to separate, filter, and Concentration process. Because membrane separation technology has the functions of filtration, fractionation, solute concentration, solute purification and refining, and has the characteristics of high efficiency, energy saving, environmental protection, molecular level filtration and simple filtration process, easy to control, etc., it has been widely used in food and medicine. , chemical industry, biology, environmental protection, metallurgy, energy, petroleum, water treatment, electronics, bionics and many other fields, has become one of the most impo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/58B01D65/02
CPCB01D61/58B01D65/02
Inventor 邱全国
Owner 四川绿沃创新环保工程有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products