CN102616888A - Constant liquid level siphon gravity flow submerged film filter and water production method thereof - Google Patents
Constant liquid level siphon gravity flow submerged film filter and water production method thereof Download PDFInfo
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- CN102616888A CN102616888A CN2011100290301A CN201110029030A CN102616888A CN 102616888 A CN102616888 A CN 102616888A CN 2011100290301 A CN2011100290301 A CN 2011100290301A CN 201110029030 A CN201110029030 A CN 201110029030A CN 102616888 A CN102616888 A CN 102616888A
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Abstract
The invention relates to a constant liquid level siphon gravity flow submerged film filter. The filter is characterized in that a water inlet chamber is connected with the film filter through a water inlet weir, a water outlet weir is arranged between a water outlet chamber and a main water outlet canal, the height of the water inlet weir is higher than the height of the water outlet weir, the film filer is provided with a liquid level meter, and a water production tube is provided with a regulating valve which is controlled by a liquid level signal. According to the invention, the difference between the heights of the water inlet weir and the water outlet weir is utilized to realize the siphon gravity flow, the water inlet weir is utilized to equalize water amounts distributed in all filter grids, and the liquid level meter is utilized to control the opening degree of the regulating valve to realize filtering with constant liquid level and equal filtration speed. The film filter has the advantages of no arrangement of a water suction pump, full utilization of the water head difference siphon gravity flow of a system, very simple and mature control mode, substantially simplified equipment, convenient management, and very obvious energy saving effect. The film filter can be used for new water plants, and also can be used for elevation matching with the original system in rebuilding and expanding of old water plants.
Description
Technical field
The present invention relates to a kind of water treatment structures commonly used, be specifically related to a kind of submerged membrane filter tank, particularly a kind of permanent liquid level siphon gravity flow submerged membrane filter tank.
Background technology
In the water treatment building traditional filter tank normally with granulated filler such as sand, coals as filtration medium.The form in filter tank is varied, uses at present comparatively extensively with the filter tank of equal grain thick-layer filtrate that can controlled filter speed, and treatment effect is better.Membrane technique is the water technology of 21 century, especially in the public works water treatment, uses the most extensively with micro-filtration, ultra-filtration membrane, and submerged membrane is wherein commonly used a kind of.The filter tank that with the submerged membrane is filtration medium is called the membrane filtration pond.Because membrane filtration pond support equipment is simple relatively, single pond water yield is relatively large, to coming not advantages of higher of water water quality requirement, is widely adopted.Because factors such as film production material, manufacture craft and cost; Membrane flux often value is bigger; Transmembrane pressure is also bigger, and particularly water temperature reduces in the winter time, and transmembrane pressure is bigger; Water production rate reduces, and the membrane filtration pond of therefore adopting both at home and abroad at present all adopts the mode of water pump " suction " to overcome transmembrane pressure.Along with the development of membrane technique, the production cost of film greatly reduces, and particularly homemade big flux, low pressure differential, membrane technique is increasingly mature cheaply, makes that utilizing the siphon gravity flow to overcome the mould difference replaces traditional pump suction and become possibility.The invalid energy consumption of bringing because of water pump operation be can reduce greatly like this, facility investment and running maintenance work reduced.For adapting to the working conditions of water temperature in winter lower (like northern area), can also parallel connection one bypass be provided with switch valve and water pump at water producing pipe regulated valve place, siphon is flow automatically or is switched to the pump suction as required.Still can still can save energy consumption greatly among such 1 year, reduce the mechanical water pump wearing and tearing with siphon gravity flow operation in the most of the time.
Summary of the invention
The purpose of this invention is to provide a kind of permanent liquid level siphon gravity flow submerged membrane filter tank, utilize the characteristics of large-flux low-pressure difference film, the water level discrepancy in elevation with less overcomes transmembrane pressure, obtains the water production rate of expection, and can carry out the permanent flux control of permanent liquid level.
In order to realize this purpose, technical scheme of the present invention is: a kind of permanent liquid level siphon gravity flow submerged membrane filter tank comprises into Shui Zongqu; With the intake chamber that the total canal of water inlet is connected, the membrane filtration pond that is connected with intake chamber is provided with the submerged membrane assembly in the membrane filtration pond; The submerged membrane assembly is connected with water producing pipe, and water producing pipe is connected with water-supplying chamber after passing the membrane filtration pond, and water-supplying chamber is connected with the total canal of water outlet; It is characterized in that being connected through influent weir between intake chamber and the membrane filtration pond, be provided with effluent weir between the total canal of water-supplying chamber and water outlet, the height of influent weir is higher than the height of effluent weir; The membrane filtration pond is provided with the liquid level appearance, and water producing pipe is provided with the regulated valve that receives liquid level signal control.According to one embodiment of present invention, the filter tank influent weir is higher than effluent weir 1.5 ~ 5m, to obtain bigger head difference.Water producing pipe one end is connected with the submerged membrane assembly after passing membrane filtration pond pool wall, and the water producing pipe the other end is connected with the bottom of water-supplying chamber.The present invention can also parallelly connected bypass on water producing pipe, and switch valve and water pump are set.Total canal of intaking is connected with the intake chamber in a plurality of membrane filtrations pond; Each intake chamber all is connected with a membrane filtration pond through influent weir; Be equipped with the submerged membrane assembly in each membrane filtration pond; Submerged membrane assembly in each membrane filtration pond all is connected with a water-supplying chamber through water producing pipe, and the water-supplying chamber in a plurality of membrane filtrations pond all is connected through the total canal of effluent weir and water outlet.The influent weir weir crest absolute altitude in each membrane filtration pond is consistent, and the effluent weir weir crest absolute altitude in each membrane filtration pond is consistent, produces drop behind the weir, the processing water yield of sharing with balanced each filter tank.
Another object of the present invention provides the product water method in a kind of permanent liquid level siphon gravity flow submerged membrane filter tank; Utilize the characteristics of large-flux low-pressure difference film, the water level discrepancy in elevation with less overcomes transmembrane pressure; Obtain the water production rate of expection, and can carry out the permanent flux control of permanent liquid level.
In order to realize this purpose; Technical scheme of the present invention is following: the product water method in a kind of permanent liquid level siphon gravity flow submerged membrane filter tank is characterized in that: after former water gets into single pond intake chamber through total canal of intaking, get into the membrane filtration pond through the water inlet overflow weir; After filter back water enters into water-supplying chamber through water producing pipe; Get into the total canal of water outlet through effluent weir, the membrane filtration pond is provided with the liquid level appearance, and the water producing pipe setting is by the regulated valve of liquid level appearance liquid level signal control; Liquid level raises continuously in the filter tank, is higher than the liquid level upper limit, explains that water outlet is less than water inlet; Then by-pass valve control is opened a big scale, otherwise liquid level reduces continuously in the filter tank, is lower than the liquid level lower limit; Then turn down a scale, constant with liquid level in the realization pond, and then realize the permanent liquid level constant speed filter in membrane filtration pond.
The present invention is provided with influent weir with traditional sand filter simultaneously and respectively filters with equilibrium and treat between the lattice that the drainage amount adds that the control of permanent liquid level is incorporated into the membrane filtration pond to guarantee filtration velocity constant theory, forms permanent liquid level siphon gravity flow membrane filtration pond.Compare with leaning on the submerged membrane filter tank of pump suction at present merely, the present invention can simplify the equipment that is disposed greatly, saves the invalid energy consumption of water pump.Even coldcondition must aspirate by parallel water pump, also can significantly reduce the pump operation time, reduce the pump wearing and tearing.The present invention is specially adapted to enlarging of old water factory and transformation, can under the condition that replaces sand filter, mate with original elevation system, makes full use of to have the water level discrepancy in elevation realization siphon gravity flow of turnover water factory, saving energy consumption now.When winter, the water production rate deficiency maybe need improve water production rate, the present invention also can parallel connection insert the suction water pump, can realize that siphon gravity flow and pump aspirate switchover operation.
Description of drawings
Fig. 1 is single lattice plat (single siphon gravity flow) of one embodiment of the invention.
Fig. 2 is single lattice plat (parallelly connected rotor pump is dominant discharge voluntarily) of one embodiment of the invention.
Fig. 3 is single lattice plat (parallel centrifugal pumps still will be controlled liquid level through valve) of one embodiment of the invention.
Fig. 4 is the A-A sectional view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Embodiment as shown in Figure 1 is a single pond in membrane filtration pond, the long 8400mm in pond, wide 3800mm, in establish double totally 8 row submerged ultrafiltration assemblies, the about 2520m of each assembly membrane area
2(external diameter), total membrane area 20160m
2, designed membrane flux 30 l/m
2H, about 1.45 ten thousand m of single lattice design water production rate
3/ d, the about 2 ~ 3m of transmembrane pressure during the design flux.Each is organized film and is connected on the water producing pipe through producing the water arm, and water producing pipe caliber DN400 is provided with the electronic or operated pneumatic valve that DN400 is with positioner on the water producing pipe, and vertex is provided with DN50 vacuum-pumping tube and valve, and filter tank Inlet and outlet water height of weir differs from 3 ~ 3.5m.Slide valve is adopted in water inlet, size 400 * 400mm, and slide valve, size 500 * 600mm are adopted in draining.Fig. 2 be on Fig. 1 embodiment basis the parallel connection band speed control by frequency variation rotor pump, the about 610m of pumping capacity
3/ h, the about 10m of lift wherein inhales journey greater than 5m.Water producing pipe 7 is divided into 2 the tunnel, the one tunnel and inserts water-supplying chamber after establishing regulated valve, and switch valve and rotor pump are established in another road, and water pump outlet pipe can directly insert before water-supplying chamber's effluent weir.Fig. 3 is the impeller pump of parallel connection band speed control by frequency variation on Fig. 1 embodiment basis, the about 610m of pumping capacity
3/ h, the about 10m of lift wherein inhales journey greater than 4m.The impeller pump parallel way is different from volumetric pump, on water producing pipe 7 separately 2 the tunnel, wherein one the tunnel only establishes switching valve, and switching valve and impeller pump are established in another road, the 2 tunnel converge and become 1 the tunnel after establish variable valve again, get into water-supplying chamber again, all utilize variable valve to accomplish that permanent liquid level filters.
The total canal 1 of the water inlet in membrane filtration pond 5 is provided with water intaking valve 2, gets into single pond intake chamber 3, through water inlet overflow weir 4 entering filter tanks 5.Submerged membrane assembly 6 is set in the filter tank 5, and film produces water and gets into water producing pipe 7, enters into water-supplying chamber 8, gets into the total canal 10 of water outlet through effluent weir 9.Form after water producing pipe 7 is bled through vacuum-pumping tube 14 and produce water passage, regulated valve 11 is set after the vacuum-pumping tube 14 on the water producing pipe 7.Filter tank 5 enters into the total canal 13 of draining through water discharging valve 12 is set, so that get rid of waste water.Every lattice filter tank is provided with liquid level appearance 15, through the open degree of liquid level signal regulating and controlling valve 11.
The present invention can also parallelly connected bypass on water producing pipe, so that switch valve and water pump to be set.Different based on selecting impeller pump or centrifugal pump for use; Establish bypass on the water producing pipe two kinds of methods of attachment can be arranged: when adopting impeller pump; Its suction flow can be by becoming the control of bottle arrangements for speed regulation; Bypass can pick out before control valve, can directly insert water-supplying chamber after switch valve and impeller pump are set, and control valve only works when miscarrying water certainly; If adopt centrifugal pump, then can use control valve and control aquifer yield with the mode of constant level, water producing pipe separates two-way earlier, wherein one the tunnel establishes transfer valve and centrifugal pump, and transfer valve is established on another road, establishes control valve again behind two-way remittance and the Cheng Yilu and inserts water-supplying chamber.Adopt system's (see figure 2) of rotor pump on water producing pipe 7, to establish bypass, enter into water-supplying chamber 8 through switch valve 16 and rotor pump 17.Close variable valve 11, open switching valve 16, open rotor pump 17, by variable frequency regulating speed control rotor pump rotating speed, the control water production rate.Adopt system's (see figure 3) of impeller pump on water producing pipe, to separate 2 the tunnel earlier; Establish switch valve 16 respectively, the one tunnel is in charge of and establishes impeller pump 17, and 2 the tunnel are in charge of and variable valve 11 are set after gathering again; Enter into water-supplying chamber 8; Through a certain switching valve 17 of switch, select the siphon gravity flow still to open the water pump suction, all through regulating and controlling valve 11 control water production rates.
Do not relate to dismounting, film back flushing, matting or the like the others of membrane filtration pond membrane module among the present invention, can be provided with by common mode.
Among the present invention, influent weir is higher than effluent weir, and its discrepancy in elevation is the source of the power of siphon gravity flow, and the electronic or Pneumatic butterfly valve of band positioner is set on the water producing pipe, under the control of liquid level signal, realizes the valve opening adjusting.Regulative mode is a benchmark with the liquid level of prior setting, and fluctuation range is ± 50mm that liquid level raises continuously in the filter tank; Be higher than reference line 50mm, water outlet be described less than water inlet, then by-pass valve control is opened a big scale; Otherwise liquid level reduces continuously in the filter tank, is lower than reference line 50mm, then turns down a scale; Constant with liquid level in the realization pond, and then realize the permanent liquid level constant speed filter in membrane filtration pond.Regulate the initial opening angle of butterfly valve when single lattice filter tank has just begun to put into operation and generally be made as 15o ~ 20o, regulating scale is a scale with 1 ~ 2% of 90o generally, by the liquid level signal closed-loop control.Influent weir top, filter tank is higher than effluent weir 1.5 ~ 5m, to obtain bigger head difference.For reducing in the film silk and the vacuum tightness in the water producing pipe.Water producing pipe passes filter tank (can filter below the water level) from pool wall.The water producing pipe vertex is provided with vacuum-pumping tube, plays vacuum water diversion and gets rid of the pneumatosis effect, and the vacuum water diversion pipe should be installed in the vertex before the by-pass valve control.Go up in limited time (as greater than 65 degree) when regulated valve reaches to open, should switch to the pump suction.Adopt the membrane filtration pond of rotor pump should close variable valve, open switching valve and rotor pump simultaneously, regulate the aspiration control filtering velocity of pump by speed control by frequency variation; Adopt the membrane filtration pond of impeller pump then can open the impeller pump suction by 2 switching valves of switch, still want regulating and controlling valve opening control filtering velocity this moment.
Key of the present invention is that the membrane filtration pond is provided with into and out of mill weir, and by-pass valve control is set on water producing pipe, utilizes the discrepancy in elevation siphon gravity flow of turnover mill weir, and constant through liquid level in the by-pass valve control control pond, filters purpose to reach permanent flux.The invention has the advantages that and do not establish the suction water pump, can make full use of the head difference siphon gravity flow of system, and mode is very simple ripe, light device is not simplified greatly, and convenient management and energy-saving effect are fairly obvious.Before gas, water flushing and matting, can continue to filter and reduce the pool inner water position,, reduce the gas blower energy consumption to save the water consumption.
The present invention considers that the low membrane flux of water temperature in winter reduces, and can the suction water pump be set through the bypath system that parallel connection is set on the water producing pipe, and switching through valve is that the suction of used water pump is to improve water production rate.Though equipment increases like this, but still can move from stream mode with siphon in part part in the season period, avoided water pump in the simple water pump suction system in original membrane filtration pond to have to move and the energy loss and the mechanical water pump wearing and tearing of the inaction that brings.Because water pump commonly used has two kinds of rotor pump (also claiming volumetric pump) and impeller pumps, rotor pump can reach the purpose of direct control water production rate through speed control by frequency variation, and the impeller pump flow is not only relevant with rotating speed and relevant with lift.Therefore the present invention is directed to parallelly connected multi-form water pump and proposed different connecting pipelines and control, switch valve mode of connection.
Claims (10)
1. a permanent liquid level siphon gravity flow submerged membrane filter tank comprises into Shui Zongqu, the intake chamber that is connected with the total canal of water inlet; The membrane filtration pond that is connected with intake chamber is provided with the submerged membrane assembly in the membrane filtration pond, the submerged membrane assembly is connected with water producing pipe; Water producing pipe is connected with water-supplying chamber after passing the membrane filtration pond, and water-supplying chamber is connected with the total canal of water outlet, it is characterized in that being connected through influent weir between intake chamber and the membrane filtration pond; Be provided with effluent weir between the total canal of water-supplying chamber and water outlet; The height of influent weir is higher than the height of effluent weir, and the membrane filtration pond is provided with the liquid level appearance, and water producing pipe is provided with the regulated valve that receives the control of liquid level appearance liquid level signal.
2. by the described membrane filtration of claim 1 pond, it is characterized in that the filter tank influent weir is higher than effluent weir 1.5 ~ 5m.
3. by the described membrane filtration of claim 1 pond, it is characterized in that being connected with the submerged membrane assembly after water producing pipe one end passes membrane filtration pond pool wall, the water producing pipe the other end is connected with the bottom of water-supplying chamber.
4. by the described membrane filtration of claim 1 pond, it is characterized in that parallelly connected bypass on water producing pipe, and switch valve and water pump are set.
5. by the described membrane filtration of claim 4 pond, it is characterized in that separating two-way at water producing pipe, wherein one the tunnel establish regulated valve and insert water-supplying chamber, switching valve is established on another road and rotor pump also directly inserts water-supplying chamber.
6. by the described membrane filtration of claim 4 pond, it is characterized in that separating two-way at water producing pipe, wherein one the tunnel establish switching valve and centrifugal water pump, switching valve is established on another road, establishes the variable valve family of power and influence again behind two-way remittance and the Cheng Yilu and inserts water-supplying chamber.
7. by each described membrane filtration pond in the claim 1 ~ 6; It is characterized in that into Shui Zongqu is connected with the intake chamber in a plurality of membrane filtrations pond; Each intake chamber all is connected with a membrane filtration pond through influent weir; Be equipped with the submerged membrane assembly in each membrane filtration pond, the submerged membrane assembly in each membrane filtration pond all is connected with a water-supplying chamber through water producing pipe, and the water-supplying chamber in a plurality of membrane filtrations pond all is connected through the total canal of effluent weir and water outlet.
8. the product water method in a permanent liquid level siphon gravity flow submerged membrane filter tank; It is characterized in that: after former water gets into single pond intake chamber through total canal of intaking; Get into the membrane filtration pond through influent weir; After filter back water enters into water-supplying chamber through water producing pipe, get into the total canal of water outlet through effluent weir, the height of influent weir is higher than the height of effluent weir; The membrane filtration pond is provided with the liquid level appearance, and the water producing pipe setting is by the regulated valve of liquid level appearance liquid level signal control, and liquid level raises continuously in the membrane filtration pond; Be higher than the liquid level upper limit, water outlet be described less than water inlet, then by-pass valve control is opened a big scale; Otherwise liquid level reduces continuously in the filter tank, is lower than the liquid level lower limit, then turns down a scale; Constant with liquid level in the realization pond, and then realize the permanent liquid level constant speed filter in membrane filtration pond.
9. product water method as claimed in claim 8; It is characterized in that: water producing pipe separates two-way, wherein one the tunnel establishes regulated valve and inserts water-supplying chamber, when another road is established switching valve and rotor pump and also directly inserted water-supplying chamber; When reaching to open, goes up in limited time regulated valve; Close regulated valve, open switching valve and rotor pump simultaneously, regulate the aspiration control filtering velocity of pump by speed control by frequency variation.
10. product water method as claimed in claim 8; It is characterized in that: water producing pipe separates two-way, wherein one the tunnel establishes switching valve and centrifugal water pump, and switching valve is established on another road; Two-way converge and Cheng Yilu after establish the variable valve family of power and influence again when inserting water-supplying chamber; Go up in limited time when regulated valve reaches to open, said 2 switching valves of switch are opened the impeller pump suction, the filtering velocity of regulating and controlling valve opening control simultaneously.
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| CN201110029030.1A CN102616888B (en) | 2011-01-27 | 2011-01-27 | Constant liquid level siphon gravity flow submerged film filter and water production method thereof |
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| CN201110029030.1A CN102616888B (en) | 2011-01-27 | 2011-01-27 | Constant liquid level siphon gravity flow submerged film filter and water production method thereof |
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| CN104360037A (en) * | 2014-11-13 | 2015-02-18 | 安徽工业大学 | Double-valve double-disc adjustable water quality fluctuation generator and use method thereof |
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| JP2020081973A (en) * | 2018-11-27 | 2020-06-04 | 株式会社クボタ | Clean water treatment method, and clean water treatment system |
| CN114367134A (en) * | 2022-01-04 | 2022-04-19 | 湖南云河信息科技有限公司 | Method for transforming siphon filter into air-water backwashing filter |
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| CN114367134A (en) * | 2022-01-04 | 2022-04-19 | 湖南云河信息科技有限公司 | Method for transforming siphon filter into air-water backwashing filter |
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