CN209226666U - Constant flow constant pressure automatic back-washing system - Google Patents
Constant flow constant pressure automatic back-washing system Download PDFInfo
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- CN209226666U CN209226666U CN201821348789.XU CN201821348789U CN209226666U CN 209226666 U CN209226666 U CN 209226666U CN 201821348789 U CN201821348789 U CN 201821348789U CN 209226666 U CN209226666 U CN 209226666U
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- backwash
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Abstract
The utility model relates to a kind of constant flow constant pressure automatic back-washing systems.Method by increasing backwash high water tank, 1/5 to the 1/10 backwash water tank water supply pump that twice backwash water pump for producing water flow will be needed originally to be changed to its flow, to realize that the high efficiency of backwashing system, the method traded space for time greatly improve the operational efficiency of backwash water pump；And the careful design of the height by backwash water tank, it is ensured that backwash pressure strictly meets the requirement of backwash, to realize the constant pressure of backwash process；By the accurate setting of manual flow valve, to realize the constant flow of backwash process.By the design of the liquid level sensor of backwash high water tank, full-automatic water-supplying is realized.
Description
Technical field
The utility model relates to full backwashing systems, more particularly, to a kind of constant flow constant pressure automatic back-washing system.
Background technique
Since the requirement of current sewage treatment increasingly improves, MBR (membrane bioreactor, Membrane Bio-Reactor)
Technique also obtains increasingly extensive application.Conventional MBR technique be divided into it is built-in and two kinds of external, it is more normal in sewage treatment
See be built-in (immersion) membrane bioreactor, the membrane bioreactor of immersion is divided into two kinds of forms: one kind is flat
Plate film, another kind are hollow-fibre membrane.
Having a process section in the system operation of hollow-fibre membrane is backwash process, is backwash the characteristics of the process
Water is big, but the duration is short, it is desirable that constant pressure.It generallys use backwash water pump and realizes the technique purpose.
However several common problems can be encountered during the type selecting of pump:
1, backwash flow is relatively large, and the backwash flux of hollow-fibre membrane is 2 times or so of permeant flux under normal conditions,
Therefore the flow of backwashing pump is 2 times or so for producing water pump, causes to need very big design discharge when pumping type selecting.
2, backwash pressure requires low and constant, and the maximum backwash pressure of the requirement film of producer is 0.6bar, and conventional water
Pump lift is all usually 1bar or more, and water pump is caused to be not easy type selecting.
3, the backwash duration is short, which suggests that producing the water setting time is 10min, and the backwash time is 30s, if choosing
With the backwash water pump of big flow, it will cause the water pump frequent start-stop and service efficiency it is extremely low.And water pump opens under normal conditions
Stop process, flow and pressure change are all very big, are difficult to realize the requirement of constant pressure constant flow.
Utility model content
The purpose of this utility model is just to provide for a kind of efficient constant flow constant pressure automatic back-washing system, this is practical
Novel system can satisfy that flow is big and constant, pressure is low and the backwash technique requirement constant, the duration is short, the utility model
Flow, the pressure (more more stable than the start and stop of water pump) of offer can be stablized, the utility model is real by the opening and closing of valve
The backwash requirement of existing various durations.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of Full-automatic backwashing system of constant flow constant pressure is complete for realizing the constant flow constant pressure to MBR membrane module
Automatic back-washing, the MBR membrane module are placed in MBR membrane cisterna, and the water outlet of the MBR membrane module is connected to by water producing pipe road
MBR produces pond, and MBR is arranged on water producing pipe road and produces water pump, which is characterized in that the system comprises backwash water tank water supply pump and instead
High water tank is washed, the MBR produces pond and connect by backwash water tank water supply pipe with backwash high water tank, and the backwash water tank supplies
Water pump is arranged on backwash water tank water supply pipe, and in dimensional orientation, the backwash high water tank is located at the top of MBR membrane cisterna, institute
It states backwash high water tank and draws backwash pipeline, the backwash pipeline is connected to water producing pipe road.
Further, the backwash tube road is provided with hand flow regulating valve.
Further, the backwash tube road is provided with backwash automatic switch valve.
Further, the backwash tube road is provided with backwash flowmeter.
Further, the water producing pipe road is provided with MBR and produces water valve.
In backwash starting, backwash automatic switch valve is opened, backwash water is entered in MBR membrane module by flow by gravity, is led to
It crosses manual Flux Valve Control backwash flow and meets design requirement.
Further, liquid level sensor is provided on the backwash high water tank.
Liquid level sensor is set for realizing automatic water supplement, to realize the high efficient full automatic backwash of constant flow, constant pressure.
Further, within the backwash high water tank highest liquid level distance MBR membrane module top 6m.
Further, the volume of the backwash high water tank is designed as 1.5-2 backwash institute water requirement.
Further, single backwash is completed, the backwash high water tank liquid level falling head control is within 300mm.
The utility model will need twice backwash water for producing water flow by the method for increase backwash high water tank originally
Pump is changed to 1/5 to 1/10 backwash water tank water supply pump of its flow, so that the high efficiency of backwashing system is realized, when changing with space
Between method, greatly improve the operational efficiency of backwash water pump；And the careful design of the height by backwash water tank, it is ensured that backwash
Pressure strictly meets the requirement of backwash, to realize the constant pressure of backwash process；By the accurate setting of manual flow valve, thus
Realize the constant flow of backwash process.By the design of the liquid level sensor of backwash high water tank, full-automatic water-supplying is realized.
Specifically, function of the utility model includes:
1, the method that space exchanges the time for, using the pump of the pump replacement big flow of small flow
It is big by one of big flow, low lift required for backwash and short duration by the way that backwash high water tank is arranged
The backwash water pump of flow is changed to the backwash water tank water supply pump of small flow, and difference in flow calculates as follows:
If MBR membranous system is 2 production lines, the backwash of 30s when being once is done within average out to every 5 minutes, if every set
The water yield of membranous system is Q1, then conventional backwash pump discharge at least needs to be configured to Q2 '=2Q1；And use the utility model system
As long as system can be achieved to provide V=Q2 ' × 30s flow in 5 minutes, i.e.,
Q2=V/ (5 × 60s)=(Q2 ' * 30)/(5*60)=Q2 '/10
If MBR membranous system is 4 production lines, the backwash of 30s when being once is done within average out to every 2.5 minutes, if often
The water yield for covering membranous system is Q1, then conventional backwash pump discharge at least needs to be configured to Q2 '=2Q1；And use the utility model
As long as system can be realized provides V=Q2 ' × 30s flow in 2.5 minutes, i.e.,
Q2=V/ (5 × 60s)=(Q2 ' * 30)/(2.5*60)=Q2 '/5
Therefore by the method for space for time, the flow Q2 of backwash water tank water supply pump can be contracted to normal condition backwash
The 1/10 to 1/5 of the flow Q2 ' of water pump P 2 '.
2, the implementation of constant flow rate
The backwash of MBR membranous system can be realized by the switch motion of backwash automatic switch valve, open and dwell time
It is lost almost nil, in backwash process, is controlled by the adjusting of hand flow regulating valve and backwash flowmeter, once adjusted
After valve opening, and it can guarantee the constancy of flow.
And the operation of conventional backwash water pump can only be by the start-up and shut-down control of water pump, the starting of water pump usually within the 30s time
The consumption regular hour is required with stopping, and flow is also difficult to realize constant flux requirement.
3, the implementation of constant pressure
Position by controlling backwash high water tank is accurately set, and guarantees the highest liquid of its highest liquid level Yu MBR membrane module
Difference H≤6m of position, in backwash process, the liquid level decline of backwash water tank is maintained within 300mm, can both guarantee that backwash water is several
Constant pressure is maintained, i.e., the backwash maximum pressure that producer requires is no more than the requirement of 0.6bar.
And conventional water pump is difficult to select the water pump of 6m or so lift, usual alternative water-aspirator pressure in type selecting
It is 10m or more, it is thus possible to a degree of damage can be caused to the structure of film.
4, the realization of pump efficiency
A kind of method of operation needs to use the backwash water pump of big flow low lift, and the every 5-10 minutes operation of its runing time
Once, duration 30s；And the method for operation of the utility model can by the water supply pump of the backwash water tank of small flow,
The efficient operation of water pump is realized by Liquid level.
And if the power of the backwash water pump routinely configured will be backwash according to the type selecting of traffic requirement and pressure requirements
5-10 times of cistern water supply pump, so that the entire configuration of electrical system be caused to waste.
Compared with prior art, which can greatly promote the fortune of water pump by the method for increase backwash high water tank
Line efficiency, and then guarantee the constant flow and constant pressure of backwash process, ensure the efficient operation of MBR system on this basis, and
The constant flow constant pressure Full-automatic backwashing system has been successfully applied in engineering and the stable operation several years.
Detailed description of the invention
Fig. 1: the structural schematic diagram of constant flow constant pressure automatic back-washing system.
T1, MBR membrane cisterna, M1, MBR membrane module, P1, MBR production water pump, T2, MBR production pond, P2, backwash water tank water supply pump,
T3, backwash high water tank, V1, hand flow regulating valve, V2, backwash automatic switch valve, V3, MBR produce water valve, F1, backwash flow
Meter, L1, liquid level sensor, the height of H, backwash high water tank.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
A kind of Full-automatic backwashing system of constant flow constant pressure, as shown in Figure 1, for realizing the perseverance to MBR membrane module M1
Flow constant pressure Full-automatic backwashing, MBR membrane module M1 are placed in MBR membrane cisterna T1, and the water outlet of MBR membrane module M1 passes through water producing pipe
Road is connected to MBR and produces pond T2, and MBR is arranged on water producing pipe road and produces water pump P 1, and system includes backwash water tank water supply pump P2 and anti-
High water tank T3 is washed, MBR produces pond T2 and connect by backwash water tank water supply pipe with backwash high water tank T3, backwash cistern water supply
It pumps P2 to be arranged on backwash water tank water supply pipe, in dimensional orientation, backwash high water tank T3 is located at the top of MBR membrane cisterna T1, instead
It washes high water tank T3 and draws backwash pipeline, backwash pipeline is connected to water producing pipe road.
Wherein, backwash tube road is provided with hand flow regulating valve V1.Backwash tube road is provided with backwash automatic switch valve
V2.Backwash tube road is provided with backwash flowmeter F1.Water producing pipe road is provided with MBR and produces water valve V3.In backwash starting, open
Backwash automatic switch valve V2, backwash water are entered in MBR membrane module M1 by flow by gravity, are controlled by hand flow regulating valve V1
Backwash flow meets design requirement.
Liquid level sensor L1 is provided on backwash high water tank T3.Liquid level sensor L1 is set for realizing automatic water supplement,
To realize the high efficient full automatic backwash of constant flow, constant pressure.
Within backwash high water tank T3 highest liquid level distance MBR membrane module M1 top 6m.The volume of backwash high water tank T3
It is designed as 1.5-2 backwash institute water requirement.Single backwash is completed, backwash high water tank T3 liquid level falling head is controlled in 300mm
Within.
The Full-automatic backwashing technique of constant flow constant pressure is carried out based on Full-automatic backwashing system, comprising the following steps:
1, MBR is opened when MBR membrane module M1 normally produces water and produces water valve V3, and starting MBR produces water pump P 1, will produce water and is delivered to
MBR is produced in the T2 of pond；
2, MBR backwash high water tank T3 is promoted to for water is produced by backwash water tank water supply pump P2；
Backwash water tank water supply pump P2 is connect with liquid level sensor L1, controls backwash water tank water supply pump by liquid level sensor L1
The opening and closing of P2, and then realize and open backwash water tank water supply pump P2 when MBR backwash high water tank T3 liquid level is low, it is high in MBR backwash
Position water tank T3 liquid level closes backwash water tank water supply pump P2 when high；
3, it executes in the program of MBR membrane module M1 to MBR production water valve V3 when backwash, is closed, opens backwash automatic switch valve
V2, adjusts aperture by hand flow regulating valve V1 and controls backwash flow, carries out flow confirmation by backwash flowmeter F1；
4, when MBR executes backwash procedure, when the liquid level of backwash high water tank T3 drops to setting liquid level, backwash water tank
Water supply pump P2 supplies water to backwash high water tank T3 again, realizes the automatic running of system；
5, at the end of MBR membrane module M1 backwash procedure, backwash automatic switch valve V2 is closed, stops backwash movement, continues
Carry out next production Water flow-path.
Method by increasing backwash high water tank will need twice backwash water pump for producing water flow to be changed to it originally
The backwash water tank water supply pump of the 1/5 to 1/10 of flow, thus realize the high efficiency of backwashing system, the method traded space for time,
Greatly improve the operational efficiency of backwash water pump；And the careful design of the height by backwash water tank, it is ensured that backwash pressure is stringent
Meet the requirement of backwash, to realize the constant pressure of backwash process；By the accurate setting of manual flow valve, to realize backwash
The constant flow of process.By the design of the liquid level sensor of backwash high water tank, full-automatic water-supplying is realized.
Specifically, the function that the present embodiment is realized includes:
1, the method that space exchanges the time for, using the pump of the pump replacement big flow of small flow
It is big by one of big flow, low lift required for backwash and short duration by the way that backwash high water tank is arranged
The backwash water pump of flow is changed to the backwash water tank water supply pump of small flow, and difference in flow calculates as follows:
If MBR membranous system is 2 production lines, the backwash of 30s when being once is done within average out to every 5 minutes, if every set
The water yield of membranous system is Q1, then conventional backwash pump discharge at least needs to be configured to Q2 '=2Q1；And use the utility model system
As long as system can be achieved to provide V=Q2 ' × 30s flow in 5 minutes, i.e.,
Q2=V/ (5 × 60s)=(Q2 ' * 30)/(5*60)=Q2 '/10
If MBR membranous system is 4 production lines, the backwash of 30s when being once is done within average out to every 2.5 minutes, if often
The water yield for covering membranous system is Q1, then conventional backwash pump discharge at least needs to be configured to Q2 '=2Q1；And use the utility model
As long as system can be realized provides V=Q2 ' × 30s flow in 2.5 minutes, i.e.,
Q2=V/ (5 × 60s)=(Q2 ' * 30)/(2.5*60)=Q2 '/5
Therefore by the method for space for time, the flow Q2 of backwash water tank water supply pump can be contracted to normal condition backwash
The 1/10 to 1/5 of the flow Q2 ' of water pump P 2 '.
2, the implementation of constant flow rate
The backwash of MBR membranous system can be realized by the switch motion of backwash automatic switch valve, open and dwell time
It is lost almost nil, in backwash process, is controlled by the adjusting of hand flow regulating valve and backwash flowmeter, once adjusted
After valve opening, and it can guarantee the constancy of flow.
And the operation of conventional backwash water pump can only be by the start-up and shut-down control of water pump, the starting of water pump usually within the 30s time
The consumption regular hour is required with stopping, and flow is also difficult to realize constant flux requirement.
3, the implementation of constant pressure
Position by controlling backwash high water tank is accurately set, and guarantees the highest liquid of its highest liquid level Yu MBR membrane module
Difference H≤6m of position, in backwash process, the liquid level decline of backwash water tank is maintained within 300mm, can both guarantee that backwash water is several
Constant pressure is maintained, i.e., the backwash maximum pressure that producer requires is no more than the requirement of 0.6bar.
And conventional water pump is difficult to select the water pump of 6m or so lift, usual alternative water-aspirator pressure in type selecting
It is 10m or more, it is thus possible to a degree of damage can be caused to the structure of film.
4, the realization of pump efficiency
A kind of method of operation needs to use the backwash water pump of big flow low lift, and the every 5-10 minutes operation of its runing time
Once, duration 30s；And the method for operation of the utility model can by the water supply pump of the backwash water tank of small flow,
The efficient operation of water pump is realized by Liquid level.
And if the power of the backwash water pump routinely configured will be backwash according to the type selecting of traffic requirement and pressure requirements
5-10 times of cistern water supply pump, so that the entire configuration of electrical system be caused to waste.
It can understand the above description of the embodiments is intended to facilitate those skilled in the art and use practical
It is novel.Person skilled in the art obviously easily can make various modifications to these embodiments, and illustrating herein
General Principle be applied in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art's announcement according to the present utility model, do not depart from improvement that the utility model scope is made and
Modification should be all within the protection scope of the utility model.
Claims (9)
1. a kind of constant flow constant pressure automatic back-washing system, complete certainly for realizing the constant flow constant pressure to MBR membrane module (M1)
Dynamic backwash, the MBR membrane module (M1) are placed in MBR membrane cisterna (T1), and the water outlet of the MBR membrane module (M1) passes through water producing pipe
Road is connected to MBR and produces pond (T2), and MBR is arranged on water producing pipe road and produces water pump (P1), which is characterized in that the system comprises anti-
Water tank water supply pump (P2) and backwash high water tank (T3), MBR production pond (T2) is by backwash water tank water supply pipe and instead
High water tank (T3) connection is washed, the backwash water tank water supply pump (P2) is arranged on backwash water tank water supply pipe, in dimensional orientation,
The backwash high water tank (T3) is located at the top of MBR membrane cisterna (T1), and the backwash high water tank (T3) draws backwash pipeline, institute
It states backwash pipeline and is connected to water producing pipe road.
2. a kind of constant flow constant pressure automatic back-washing system according to claim 1, which is characterized in that the backwash pipeline
On be provided with hand flow regulating valve (V1).
3. a kind of constant flow constant pressure automatic back-washing system according to claim 1, which is characterized in that the backwash pipeline
On be provided with backwash automatic switch valve (V2).
4. a kind of constant flow constant pressure automatic back-washing system according to claim 1, which is characterized in that the backwash pipeline
On be provided with backwash flowmeter (F1).
5. a kind of constant flow constant pressure automatic back-washing system according to claim 1, which is characterized in that the water producing pipe road
On be provided with MBR produce water valve (V3).
6. a kind of constant flow constant pressure automatic back-washing system according to claim 1, which is characterized in that the backwash is high-order
Liquid level sensor (L1) is provided on water tank (T3).
7. a kind of constant flow constant pressure automatic back-washing system according to claim 1, which is characterized in that the backwash is high-order
Within water tank (T3) highest liquid level distance MBR membrane module (M1) top 6m.
8. a kind of constant flow constant pressure automatic back-washing system according to claim 1, which is characterized in that the backwash is high-order
The volume of water tank (T3) is designed as 1.5-2 backwash institute water requirement.
9. a kind of constant flow constant pressure automatic back-washing system according to claim 1, which is characterized in that it is anti-to complete single
It washes, backwash high water tank (T3) the liquid level falling head control is within 300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821348789.XU CN209226666U (en) | 2018-08-21 | 2018-08-21 | Constant flow constant pressure automatic back-washing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821348789.XU CN209226666U (en) | 2018-08-21 | 2018-08-21 | Constant flow constant pressure automatic back-washing system |
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| Publication Number | Publication Date |
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| CN209226666U true CN209226666U (en) | 2019-08-09 |
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ID=67497899
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821348789.XU Active CN209226666U (en) | 2018-08-21 | 2018-08-21 | Constant flow constant pressure automatic back-washing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110844998A (en) * | 2018-08-21 | 2020-02-28 | 上海凯鑫分离技术股份有限公司 | Constant-flow constant-pressure automatic backwashing system and backwashing process |
-
2018
- 2018-08-21 CN CN201821348789.XU patent/CN209226666U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110844998A (en) * | 2018-08-21 | 2020-02-28 | 上海凯鑫分离技术股份有限公司 | Constant-flow constant-pressure automatic backwashing system and backwashing process |
| CN110844998B (en) * | 2018-08-21 | 2024-07-02 | 上海凯鑫分离技术股份有限公司 | Constant-flow constant-pressure automatic backwashing system and backwashing process |
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