CN201021442Y

CN201021442Y - Water Jet Circulation Membrane Bioreactor

Info

Publication number: CN201021442Y
Application number: CNU2007200684209U
Authority: CN
Inventors: 徐高田; 秦哲; 赵军; 赵朋卫; 王辉; 官春芬
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2007-03-29
Filing date: 2007-03-29
Publication date: 2008-02-13
Anticipated expiration: 2017-03-29

Abstract

The utility model provides a water jet circulation membrane biological reaction device. It consists of a reactor and its inlet and outlet pipes. A vacuum pressure gauge, a flow meter and an outlet pump are installed on the outlet pipe. A flow meter and an inlet pump are installed on the inlet pipe. The interior is provided with an inner cylinder with a downward opening, and a membrane module is installed inside the cylinder, and the membrane module is connected with the outlet pipe. The water inlet pipe extends into the inner cylinder through the outer cylinder to feed water. A water pump and a water injector, and a circulating water pipe extend into the inner cylinder through the outer cylinder. The reactor is aerated through the water injector on the circulating water pipe, and the membrane module is used to discharge water. It has the advantages of high mass transfer efficiency, low membrane fouling, large biomass, low sludge production, high load, small footprint, and easy operation.

Description

Water-jet circulation membrane biological reaction apparatus

Technical field

The utility model relates to a kind of environmental pollution improvement device, especially a kind of water-jet circulation membrane biological reaction apparatus that sanitary sewage or trade effluent are handled.

Background technology

Processing to sanitary sewage or trade effluent mainly contains methods such as physics, chemistry and biological chemistry, generally adopts both at home and abroad at present based on biochemical method, and physics, chemical process are sanitary sewage and the trade effluent that the method for assisting is handled complicated component.Traditional activated sludge process adopts air-diffuser to carry out aeration, decompose dirty pollutants in waste water matter by the metabolism of microorganism, water outlet after the processing enters second pond and precipitates, and removes the suspended matter in the water, to reach the purpose of dirty waste water treatment.But there are some shortcomings in this technology, because its adopts blast aeration, makes oxygen transfer rate lower, only is about 10%, and energy consumption is just bigger like this, and is unfavorable to the processing of the organic waste water of high density.The sedimentation time that the while second pond needs is longer, and its volume is just corresponding bigger like this, and floor space is just bigger; In addition, some phenomenons such as some sludge bulkings, mud come-up can not appear in current biochemistry pool operation operational management at that time, and this moment, second pond just was difficult to guarantee effluent characteristics.

Membrane separation technique is being applied in the middle of the water technology more and more widely in recent years, and it combines with traditional biological treatment in the sewage disposal, has just formed the film biologic treating technique.Replace traditional second pond precipitation to overcome many shortcomings of original technology with membrane sepn, it dwindles the floor space of total system greatly, its good solid-liquid separating power makes treat effluent obtain more reliable assurance simultaneously, it can be trapped in active sludge in the bio-reactor to greatest extent in addition, the ability of system's anti-shock loading and processing hazardous and noxious substances is improved, and the stability of system is strengthened.

The part but present membrane bioreactor also comes with some shortcomings, particularly film pollution problems along with pollutent is constantly piled up on the film surface, can make membrane flux constantly descend, until not using.In addition, membrane sepn and traditional activated sludge process bonded membrane bioreactor still can't overcome the low deficiency of its oxygen transfer rate.

Summary of the invention

In order to overcome the deficiency that present membrane biological reaction apparatus oxygen transfer rate is low and film pollutes, the utility model provides a kind of novel water-jet circulation membrane biological reaction apparatus, this reaction unit oxygen transfer rate height, biomass is big, active strong, floor space is little, and effectively controlling diaphragm pollutes, and is suitable for handling sanitary sewage and various high concentrated organic wastewater.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of water-jet circulation membrane biological reaction apparatus, comprise a reactor and water inlet pipe and rising pipe, rising pipe is provided with vacuum pressure gauge, under meter and go out water pump, water inlet pipe is provided with under meter and intake pump, it is characterized in that establishing circulating water channel on the urceolus top of reactor, establish inner core to lower opening in urceolus inside, establish membrane module in the guide shell, membrane module links to each other with rising pipe, water inlet pipe stretches into the inner core water inlet through urceolus, circulating pipe is established in the circulating water channel bottom, establishes under meter on the circulating pipe, water circulating pump and water sprayer, circulating pipe stretches into inner core through urceolus.

Above-mentioned water sprayer is installed on the branch road, by flooding velocity and the pressure of a Flow-rate adjustment valve regulation on the main line by water sprayer.

The ratio H of the depth H of above-mentioned reactor and diameter D: D=4-8.

Above-mentioned inner/outer tube cross-sectional area compares S _In: S _Outward=4-9.

The position of above-mentioned membrane module is the bottom in internal guide cylinder.

Above-mentioned membrane module is the polyvinylidene difluoride (PVDF) hollow fiber film assembly.

The structure of above-mentioned polyvinylidene difluoride (PVDF) hollow fiber film assembly is: the two ends of polyvinylidene difluoride (PVDF) hollow fiber membrane bundle all are connected on one, and the film bundle is open, circlewise.

The utility model compared with prior art, have following conspicuous substantive distinguishing features and advantage: the utility model adopts water sprayer to carry out aeration, hydraulic shear effect under the high-velocity jet makes bubble high dispersing and uniform mixing, it is big that the gas-to-liquid contact area becomes, and the mass-transfer efficiency of oxygen is corresponding to be improved; Reactor inner core current high turbulence makes gas-to-liquid contact more abundant; The internal recycle of reactor current prolongs duration of contact, helps the mass transfer of oxygen, and the internal recycle effect also makes reactor be in complete blended state, can improve the capacity of resisting impact load of reactor; The reactor degree of depth and diameter ratio are bigger, oxygen in the bigger depth of water and the mass-transfer efficiency under the pressure head than higher; Membrane module can effectively separate solid-liquid, guarantees effluent quality, can to greatest extent mud be trapped in the reactor, and the ability of system's anti-shock loading and processing hazardous and noxious substances is improved; Membrane module can make hydraulic detention time separate fully with sludge retention time, and effectively be trapped in bio-reactor in than long microorganism generation time, optimizes effluent quality; Open membrane module is arranged on the guide shell bottom, and the height turbulent flow in the tube can effectively suppress film and pollute; The utlity model has advantages such as biomass is big, sludge output is few, load is high, occupation of land is little, the operation operation is easy in addition.

Description of drawings

Accompanying drawing is the structural representation of an embodiment of the utility model.

Embodiment

Below in conjunction with accompanying drawing a preferred embodiment of the present utility model is elaborated.

Referring to accompanying drawing, this water-jet circulation membrane biological reaction apparatus mainly is made of inner/

outer tube

11,12, water sprayer 5, the membrane module 10 of reactor 20.

Establish circulating water channel 13 on reactor urceolus 12 tops, upflow tube 14 is established on circulating water channel 13 tops, reactor bottom is established blow-down pipe 19, inside reactor is established inner core 11, establish membrane module 10 in the inner core 11, membrane module 10 links to each other with rising pipe 17, establish vacuum pressure gauge 15 on the rising pipe 17, water flow meter 16 and go out water pump 18, establish flooding velocity meter 2 and intake pump 1 on the water inlet pipe 3, water inlet pipe 3 stretches into inner core 11 water inlets through urceolus 12, circulating pipe 4 is established in circulating water channel 13 bottoms, circulating pipe 4 stretches into inner core 11 through urceolus 12, establishes circulating water flow meter 8 on the circulating pipe 4, water circulating pump 9 and water sprayer 5, water sprayer 5 are installed on the branch road of circulating pipe 4, by the water yield and the hydraulic pressure that the flow control valve on the main line 6 is regulated by water sprayer 5, establish gas meter 7 on the water sprayer air suction pipe.

Waste water in the circulating water channel 13 forms high velocity flow through water circulating pump 9 pressurization backs and enters water sprayer 5, high velocity flow produces negative pressure in water sprayer 5 throats, air sucks water sprayer 5 automatically through air suction pipe under action of pressure, pass through the violent stirring that mixes in throat with current, air is ground into small bubble.The high velocity flow that contains a large amount of micro-bubbles enters the inner core 11 of reactor 20 inside through circulating pipe 4, on the one hand, is in the state of high turbulence in high velocity flow causes in the pipe 11, makes the gas-liquid two-phase thorough mixing, has improved mass-transfer efficiency; In addition, the hydraulic shear effect of high velocity flow makes the active sludge flco size decreases in the reactor 20, has improved the microenvironment of microbial reaction, has improved the efficient of aerobic treatment; The cross-flow hydraulic shear effect of high velocity flow effectively controlling diaphragm is polluted, and reduces wash number.Sewage in the reactor 20 flows from ring-like space is upwards anti-all around behind inner core 11 arrival bottoms, current form internal recycle in reactor 20 like this, and gas-liquid-solid three-phase is prolonged duration of contact, mix more abundant, strengthen mass transfer, improved the capacity of resisting impact load of reactor 20 simultaneously.Waste water after the biochemical treatment enters rising pipe 17 after the Ultrafiltration of membrane module 10, can guarantee the stable of effluent quality by the mode water outlet of adopting membrane filtration, can also to greatest extent active sludge be trapped in the reactor 20 simultaneously, improve the stability of system processing power and operation.

Claims

1. A water jet circulation membrane bioreactor, comprising a reactor (20) and its inlet pipe (3) and outlet pipe (17), is characterized in that a vacuum pressure gauge (15) is established on the outlet pipe (17), A flowmeter (16) and an outlet pump (18), a flowmeter (2) and an inlet pump (1) are arranged on the water inlet pipe (3), and a circulating water tank (13) is arranged on the upper part of the outer cylinder (12) of the reactor (20) , inside the outer cylinder (12) there is an inner cylinder (11) which opens downward, and a membrane module (10) is arranged inside the inner cylinder (11). The membrane module (10) is connected with the outlet pipe (17), and the water inlet pipe (3) passes through The outer cylinder (12) extends into the inner cylinder (11) to feed water, the lower part of the circulating water tank (13) is provided with a circulating water pipe (21), and the circulating water pipe (21) is provided with a flow meter (8), a circulating water pump (9) and a water ejector (5), the circulating water pipe (21) stretches into the inner cylinder (11) through the outer cylinder (12).

2. The water-jet circulation membrane bioreactor according to claim 1, characterized in that the water jet (5) is installed on the branch road, and is regulated by a flow regulating valve (6) on the main road to pass through the water jet. water flow and pressure.

3. The water jet circulating membrane bioreactor according to claim 1, characterized in that the ratio of the depth H to the diameter D of the reactor (20) is H:D=4-8.

4. The water jet circulation membrane bioreactor according to claim 1, characterized in that the cross-sectional area ratio of the inner and outer cylinders (11, 12) is _Sinner : _Souter =4-9.

5. The water jet circulation membrane bioreactor according to claim 1, characterized in that the position of the membrane module (10) is the lower part of the inner cylinder (11).

6. The water jet circulation membrane bioreactor according to claim 1, characterized in that said membrane module (10) is a polyvinylidene fluoride hollow fiber membrane module.

7. The water jet circulation membrane bioreactor according to claim 6, characterized in that the structure of the polyvinylidene fluoride hollow fiber membrane module is: both ends of the polyvinylidene fluoride hollow fiber membrane bundle are connected at one end , the membrane bundle is open and ring-shaped.