CN102616888B - 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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- CN102616888B CN102616888B CN201110029030.1A CN201110029030A CN102616888B CN 102616888 B CN102616888 B CN 102616888B CN 201110029030 A CN201110029030 A CN 201110029030A CN 102616888 B CN102616888 B CN 102616888B
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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 and commonly use structures, be specifically related to a kind of immersed membrane filter, particularly one permanent liquid level siphon gravity flow immersed membrane filter.
Background technology
In water treatment building, traditional filter tank is normally using the granulated filler such as sand, coal as filter medium.The form in filter tank is varied, at present with can the filter tank application of equal grain thick-layer filtrate of controlled filter speed comparatively extensive, treatment effect is better.Membrane technology is the water treatment technology of 21 century, is especially most widely used in municipal works water treatment with micro-filtration, milipore filter, and submerged membrane is the one wherein commonly used.Be that the filter tank of filter medium is called membrane filtration pond with submerged membrane.Because membrane filtration pond corollary equipment is relatively simple, single pond water yield is relatively large, to water water quality requirement not advantages of higher, is widely adopted.Due to factors such as film production material, manufacture craft and costs, membrane flux often value is larger, transmembrane pressure is also larger, particularly water temperature reduces in the winter time, transmembrane pressure is larger, aquifer yield reduces, and the membrane filtration pond therefore adopted 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 technology, the production cost of film greatly reduces, and particularly the membrane technology of domestic large flux, low voltage difference, low cost is increasingly mature, makes the pump suction utilizing siphon gravity flow to overcome the replacement of mould difference traditional become possibility.Greatly can reduce the ineffective energy consumption because water pump operation brings like this, reduce equipment investment and operation maintenance work.For adapting to the service condition of water temperature in winter lower (as northern area), a bypass in parallel can also be provided with switch valve and water pump at water producing pipe control valve place, can siphon flow automatically or switch to pump to aspirate as required.Still can run with siphon gravity flow within the most of the time among such 1 year, still greatly can save energy consumption, reduce mechanical water pump wearing and tearing.
Summary of the invention
The object of this invention is to provide a kind of permanent liquid level siphon gravity flow immersed membrane filter, utilize the feature of large-flux low-pressure difference film, with the less water level discrepancy in elevation, overcome transmembrane pressure, obtain the aquifer yield of expection, and the control of permanent liquid level Heng Tong amount can be carried out.
In order to realize this purpose, technical scheme of the present invention is: a kind of permanent liquid level siphon gravity flow immersed membrane filter, comprise into Shui Zongqu, the intake chamber be connected with the total canal of water inlet, the membrane filtration pond be connected with intake chamber, membrane filtration is provided with immersion type membrane component in pond, immersion type membrane component is connected with water producing pipe, water producing pipe is connected with water-supplying chamber after passing membrane filtration pond, water-supplying chamber is connected with the total canal of water outlet, it is characterized in that being connected by influent weir between intake chamber with membrane filtration pond, effluent weir is provided with between water-supplying chamber and the total canal of water outlet, the height of influent weir is higher than the height of effluent weir, membrane filtration pond is provided with tank gage, water producing pipe is provided with the control valve controlled by liquid level signal.According to one embodiment of present invention, filter tank influent weir higher than effluent weir 1.5 ~ 5m, to obtain larger head difference.Water producing pipe one end is connected with immersion type membrane component through after the pool wall of membrane filtration pond, and the water producing pipe other end is connected with the bottom of water-supplying chamber.The present invention can also bypass in parallel on water producing pipe, and arranges switch valve and water pump.Total canal of intaking is connected with the intake chamber in multiple membrane filtration pond, each intake chamber is all connected with a membrane filtration pond by influent weir, immersion type membrane component is equipped with in each membrane filtration pond, immersion type membrane component in each membrane filtration pond is all connected with a water-supplying chamber by water producing pipe, and the water-supplying chamber in multiple membrane filtration pond is all connected by 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, the process water yield shared with each filter tank of equilibrium behind weir.
Another object of the present invention is to provide a kind of product water method of permanent liquid level siphon gravity flow immersed membrane filter, utilize the feature of large-flux low-pressure difference film, with the less water level discrepancy in elevation, overcome transmembrane pressure, obtain the aquifer yield of expection, and the control of permanent liquid level Heng Tong amount can be carried out.
In order to realize this purpose, technical scheme of the present invention is as follows: a kind of product water method of permanent liquid level siphon gravity flow immersed membrane filter, it is characterized in that: after former water enters single pond intake chamber by the total canal of water inlet, membrane filtration pond is entered by water inlet downflow weir, after after filter, water enters into water-supplying chamber by water producing pipe, enter the total canal of water outlet by effluent weir, membrane filtration pond is provided with tank gage, and water producing pipe arranges the control valve controlled by tank gage liquid level signal; When in filter tank, liquid level raises continuously, higher than the liquid level upper limit, illustrate that water outlet is less than into water, then by-pass valve control opens a large scale, otherwise when liquid level in filter tank reduces, continuously lower than liquid level lower limit, then turn down a scale, to realize constant liquid level in pond, and then realize the permanent liquid level constant speed filter in membrane filtration pond.
Traditional sand filter is arranged influent weir simultaneously and adds that constant liquis position control is to ensure that the theory that the rate of filtration is constant is incorporated into membrane filtration pond with the water yield to be filtered between each filter grid of equilibrium by the present invention, forms permanent liquid level siphon gravity flow membrane filtration pond.Compared with the immersed membrane filter aspirated with leaning on merely pump at present, the present invention can simplify configured equipment greatly, saves water pump ineffective energy consumption.Even if cryogenic conditions must aspirate by parallel water pump, also can greatly reduce the pump operation time, reduce pump wearing and tearing.The present invention is specially adapted to the enlarging of old water factory and transformation, can mate under the condition replacing sand filter with original elevation system, makes full use of the existing turnover water factory water level discrepancy in elevation and realizes siphon gravity flow, save energy consumption.As not enough in aquifer yield in winter or when needing to improve aquifer yield, the present invention also can access suction water pump in parallel, can realize siphon gravity flow and pump suction switchover operation.
Accompanying drawing explanation
Fig. 1 is single lattice plane (single siphon gravity flow) of one embodiment of the invention.
Fig. 2 is single lattice plane (impeller pump in parallel can control flow voluntarily) of one embodiment of the invention.
Fig. 3 is single lattice plane (parallel centrifugal pumps still will pass through Valve controlling liquid level) of one embodiment of the invention.
Fig. 4 is the A-A profile of Fig. 1.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment is a single pond in membrane filtration pond as shown in Figure 1, the long 8400mm in pond, wide 3800mm, and inside establish double totally 8 row submerged ultrafiltration assemblies, each assembly membrane area is about 2520m
2(external diameter), total membrane area 20160m
2, designed membrane flux 30 l/m
2h, single lattice design aquifer yield about 1.45 ten thousand m
3/ d, transmembrane pressure about 2 ~ 3m during design flux.Each group of film is connected on water producing pipe by producing water arm, and water producing pipe caliber DN400, water producing pipe is arranged the electronic or operated pneumatic valve that DN400 is with positioner, peak arranges DN50 vacuum-pumping tube and valve, and filter tank Inlet and outlet water height of weir differs from 3 ~ 3.5m.Water inlet adopts slide valve, size 400 × 400mm, and draining adopts slide valve, size 500 × 600mm.Fig. 2 is the impeller pump of band frequency control in parallel on Fig. 1 embodiment basis, and pump discharge is about 610m
3/ h, lift is about 10m, wherein inhales journey and is greater than 5m.Water producing pipe 7 is divided into 2 tunnels, and water-supplying chamber is accessed after establishing control valve in a road, and switch valve and impeller pump are established in another road, before water pump outlet pipe can directly access water-supplying chamber's effluent weir.Fig. 3 is on Fig. 1 embodiment basis and the centrifugal pump of associated frequency control, and pump discharge is about 610m
3/ h, lift is about 10m, wherein inhales journey and is greater than 4m.Centrifugal pump parallel way is different from displacement pump, separately 2 tunnels on water producing pipe 7, and wherein transfer valve is only established in a road, and transfer valve and centrifugal pump are established in another road, and 2 tunnels are converged and established control valve again after becoming 1 tunnel, then enter water-supplying chamber, and permanent liquid level is filtered all to utilize control valve to accomplish.
The total canal 1 of water inlet in membrane filtration pond 5 arranges water intaking valve 2, enters single pond intake chamber 3, enters filter tank 5 by water inlet downflow weir 4.Arrange immersion type membrane component 6 in filter tank 5, film produces water and enters water producing pipe 7, enters into water-supplying chamber 8, enters the total canal 10 of water outlet by effluent weir 9.Water producing pipe 7 is formed after being bled by vacuum-pumping tube 14 and produces water passage, and water producing pipe 7 arranges control valve 11 after vacuum-pumping tube 14.Filter tank 5 enters into the total canal 13 of draining, to get rid of waste water by arranging water discharging valve 12.Every lattice filter tank arranges tank gage 15, by the open degree of liquid level signal control and regulation valve 11.
The present invention can also bypass in parallel on water producing pipe, to arrange switch valve and water pump.According to selecting impeller pump or centrifugal pump difference, water producing pipe is established bypass can have two kinds of methods of attachment: when adopting impeller pump, its suction flow can be controlled by change bottle arrangements for speed regulation, bypass can pick out before control valve, directly can access water-supplying chamber after arranging switch valve and impeller pump, control valve only works when from miscarriage water; According to centrifugal pump, then can use control valve with the mode water production control amount of constant level, water producing pipe first separates two-way, and wherein transfer valve and centrifugal pump are established in a road, and transfer valve is established on another road, and two-way remittance establishes control valve to access water-supplying chamber behind Bing Cheng mono-tunnel again.Adopt the system (see figure 2) of impeller pump to establish bypass on water producing pipe 7, enter into water-supplying chamber 8 by switch valve 16 and impeller pump 17.Close control valve 11, open transfer valve 16, open impeller pump 17, by variable frequency regulating speed control impeller pump rotating speed, water production control amount.The system (see figure 3) of centrifugal pump is adopted first to separate 2 tunnels on water producing pipe, establish switch valve 16 respectively, one tunnel is in charge of and is established centrifugal pump 17,2 tunnels be in charge of gather after control valve 11 is set again, enter into water-supplying chamber 8, by a certain transfer valve 17 of switch, select siphon gravity flow or open water pump suction, all by control and regulation valve 11 water production control amount.
Do not relate to the dismounting of membrane filtration pond membrane module, film backwash, Chemical cleaning etc. other side in the present invention, can arrange by common mode.
In the present invention, influent weir is higher than effluent weir, and its discrepancy in elevation is the power source of siphon gravity flow, water producing pipe is arranged the electronic or Pneumatic butterfly valve of band positioner, realizes valve opening and regulate under the control of liquid level signal.Regulative mode with the liquid level set in advance as benchmark, fluctuation range is ± 50mm, when in filter tank, liquid level raises continuously, higher than datum line 50mm, illustrate that water outlet is less than into water, then by-pass valve control opens a large scale, otherwise when liquid level in filter tank reduces continuously, lower than datum line 50mm, then turn down a scale, to realize constant liquid level in pond, and then realize the permanent liquid level constant speed filter in membrane filtration pond.When single lattice filter tank has just started to put into operation, the initial opening angle of regulating butterfly valve is generally set to 15o ~ 20o, regulates scale to be generally a scale with 1 ~ 2% of 90o, by liquid level signal closed-loop control.Influent weir top, filter tank higher than effluent weir 1.5 ~ 5m, to obtain larger head difference.For reducing the vacuum in film silk and in water producing pipe.Water producing pipe passes filter tank (can filter below water level) from pool wall.Water producing pipe peak arranges vacuum-pumping tube, plays vacuum water diversion and gets rid of pneumatosis effect, vacuum water diversion pipe should be arranged on by-pass valve control before peak.Open upper prescribing a time limit (as being greater than 65 degree) when control valve reaches, pump suction should be switched to.Adopt the membrane filtration pond of impeller pump to close control valve, open transfer valve and impeller pump simultaneously, regulate the aspiration of pump to control filtering velocity by frequency control; Adopt the membrane filtration pond of centrifugal pump then can open centrifugal pump suction by switch 2 transfer valves, now still will control to adjust valve opening and control filtering velocity.
Key of the present invention is that membrane filtration pond is arranged into and out of mill weir, and arranges by-pass valve control on water producing pipe, utilizes the discrepancy in elevation siphon gravity flow of turnover mill weir, and controls constant liquid level in pond, to reach permanent flux filtration object by by-pass valve control.The invention has the advantages that and do not establish suction water pump, can make full use of the head difference siphon gravity flow of system, and control mode is very simple ripe, light device does not simplify greatly, convenient management and energy-saving effect is fairly obvious.Rinse at gas, water and can continue before Chemical cleaning to filter to reduce pool inner water position, to save water consumption, reducing fan energy use.
The present invention considers that the lower membrane flux of water temperature in winter reduces, and arranging suction water pump, being aspirated to improve aquifer yield by valve transfer and available water pump by water producing pipe being arranged bypath system in parallel.Although equipment increases like this, but still can run in siphon gravity flow mode at part partial period in season, avoid water pump in the simple water pump suction system in original membrane filtration pond and have to run and the energy loss of inaction that brings and mechanical water pump wearing and tearing.Because conventional water pump has impeller pump (also claiming displacement pump) and centrifugal pump two kinds, impeller pump can reach the object of direct water production control amount by frequency control, and Centrifugal Pump is not only relevant with rotating speed also relevant with lift.Therefore the present invention is directed to multi-form water pump in parallel and propose different connecting lines and control, switch valve connected mode.
Claims (7)
1. a permanent liquid level siphon gravity flow immersed membrane filter, comprise into Shui Zongqu, the intake chamber be connected with the total canal of water inlet, the membrane filtration pond be connected with intake chamber, membrane filtration is provided with immersion type membrane component in pond, immersion type membrane component is connected with water producing pipe, water producing pipe is connected with water-supplying chamber after passing membrane filtration pond, water-supplying chamber is connected with the total canal of water outlet, it is characterized in that being connected by influent weir between intake chamber with membrane filtration pond, effluent weir is provided with between water-supplying chamber and the total canal of water outlet, the height of influent weir is higher than the height of effluent weir, membrane filtration pond is provided with tank gage, water producing pipe is provided with the control valve controlled by tank gage liquid level signal, bypass in parallel on water producing pipe, and switch valve and water pump are set, upper prescribing a time limit is opened when control valve reaches, switch to water pump suction, filter tank influent weir is higher than effluent weir 1.5 ~ 5m, water producing pipe one end is connected with immersion type membrane component through after the pool wall of membrane filtration pond, the water producing pipe other end is connected with the bottom of water-supplying chamber.
2., by membrane filtration pond according to claim 1, it is characterized in that separating two-way at water producing pipe, wherein a road is established control valve and is accessed water-supplying chamber, and another road establishes transfer valve and impeller pump also directly to access water-supplying chamber.
3. by membrane filtration pond according to claim 1, it is characterized in that separating two-way at water producing pipe, wherein transfer valve and centrifugal water pump are established in a road, and transfer valve is established on another road, and two-way remittance establishes the control valve family of power and influence to access water-supplying chamber behind Bing Cheng mono-tunnel again.
4. by the membrane filtration pond according to any one of claim 1 ~ 3, it is characterized in that being connected into Shui Zongqu with the intake chamber in multiple membrane filtration pond, each intake chamber is all connected with a membrane filtration pond by influent weir, immersion type membrane component is equipped with in each membrane filtration pond, immersion type membrane component in each membrane filtration pond is all connected with a water-supplying chamber by water producing pipe, and the water-supplying chamber in multiple membrane filtration pond is all connected by the total canal of effluent weir and water outlet.
5. the product water method of a permanent liquid level siphon gravity flow immersed membrane filter, it is characterized in that: after former water enters single pond intake chamber by the total canal of water inlet, membrane filtration pond is entered by influent weir, after after filter, water enters into water-supplying chamber by water producing pipe, enter the total canal of water outlet by effluent weir, the height of influent weir is higher than the height of effluent weir; Membrane filtration pond is provided with tank gage, water producing pipe arranges the control valve controlled by tank gage liquid level signal, when in membrane filtration pond, liquid level raises continuously, higher than the liquid level upper limit, illustrate that water outlet is less than into water, then by-pass valve control opens a large scale, otherwise when liquid level in filter tank reduces continuously, lower than liquid level lower limit, then turn down a scale, to realize constant liquid level in pond, and then realize the permanent liquid level constant speed filter in membrane filtration pond; Bypass in parallel on water producing pipe, and switch valve and water pump are set, open upper prescribing a time limit when control valve reaches, switch to water pump suction.
6. product water method as claimed in claim 5, it is characterized in that: water producing pipe separates two-way, wherein a road is established control valve and is accessed water-supplying chamber, when another road establishes transfer valve and impeller pump also directly to access water-supplying chamber, upper prescribing a time limit is opened when control valve reaches, close control valve, open transfer valve and impeller pump simultaneously, regulate the aspiration of pump to control filtering velocity by frequency control.
7. product water method as claimed in claim 5, it is characterized in that: water producing pipe separates two-way, wherein transfer valve and centrifugal water pump are established in a road, transfer valve is established on another road, when establishing the control valve family of power and influence to access water-supplying chamber again behind two-way remittance Bing Cheng mono-tunnel, open upper prescribing a time limit when control valve reaches, described in switch, centrifugal pumps suction opened by 2 transfer valves, controls to adjust valve opening simultaneously and controls filtering velocity.
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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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| CN102616888B true CN102616888B (en) | 2015-04-15 |
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| CN104360037B (en) * | 2014-11-13 | 2016-02-17 | 安徽工业大学 | Bivalve double plate is adjustable water quality wavegenerator and using method |
| JP7153540B2 (en) * | 2018-11-27 | 2022-10-14 | 株式会社クボタ | Water purification method and water purification system |
| CN109574223A (en) * | 2018-12-10 | 2019-04-05 | 智造起源科技有限公司 | A kind of MBR water treatment system and its method producing water using siphon |
| 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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