CN107583319A - A kind of more medium filter and its control method - Google Patents
A kind of more medium filter and its control method Download PDFInfo
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- CN107583319A CN107583319A CN201710873417.2A CN201710873417A CN107583319A CN 107583319 A CN107583319 A CN 107583319A CN 201710873417 A CN201710873417 A CN 201710873417A CN 107583319 A CN107583319 A CN 107583319A
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Abstract
The embodiment of the invention discloses a kind of more medium filter and its control method, the more medium filter includes multi-medium filtering tank body and the draining amount detecting device being connected with the multi-medium filtering tank body；Wherein, the draining amount detecting device is used for the displacement that the multi-medium filtering tank body is detected in more medium filter backwash process.Technical scheme provided in an embodiment of the present invention, displacement of the multi-medium filtering tank body in drainage procedure is detected by draining amount detecting device, displacement precise control, ensure that backwash process can be carried out sequentially, avoid influenceing the situation generation of filter backwash effect because displacement can not rationally control in the prior art, reach improvement more medium filter backwash effect, lift the beneficial effect of producing water water quality.
Description
Technical field
The present embodiments relate to water treatment field, more particularly to a kind of more medium filter and its control method.
Background technology
In water process turbidity removal or softened water, the prime pretreatment of pure water, to obtain the less water outlet of turbidity, typically by it
Filtered by more medium filter, so as to effectively remove suspended impurity, after filtering, delivery turbidity can reach less than 3 grades.
During use, the suspension in raw water is adsorbed and constantly in filtrate more medium filter by filter material surface
Accumulated in layer, filtering layer hole is gradually blocked by dirt, water head loss by filtration, and current are to adsorbing the shearing in the dirt of filter material surface
Power becomes big, and some of which particle is moved down into lower floor's filtrate in the impact of current, eventually makes suspension content in water not
It is disconnected to rise, water degradation.Therefore more medium filter after using some cycles, it is necessary to which counter clean filtrate, to recover filtrate
The pollutant carrying capacity of layer.Flow reversal makes filtering layer expansion, suspended, by the shearing force of current and the collision of particle by filter material layer
Frictional force cleaning filter material layer makes the dirt in filtering layer depart from and be discharged with backwash water.To strengthen cleaning performance, introduced in tank body
The air of certain pressure is cleaned, and filtrate is produced certain fluctuating turbulence, and filtering material particle carries out shearing friction, absorption is existed
The polluter of filter material surface comes off to be taken out of in waterpower backwash with water.The ionic salinity brought into by just washing down during except backwash
Pollute and filtrate is formed filter membrane.The whether appropriate of backwash process process directly affects production water quality.
In the prior art, in draining, the mode of generally use control water discharge time controls liquid level, but due to water inlet
The difference of water quality, the filter material layer retention of more medium filter and absorption situation have a great difference.Therefore after production water terminates every time
When carrying out draining, liquid level after more medium filter internal drainage can not be controlled by water discharge time, and liquid level mistake after draining
It is high or it is too low can all influence air purge effect, so as to influence whole backwash effect.
The content of the invention
The embodiment of the present invention provides a kind of more medium filter and its control method, with avoid because after draining liquid level without
The situation that method rationally controls and influences filter backwash effect occurs.
To achieve the above object, the embodiment of the present invention adopts the following technical scheme that：
In a first aspect, the embodiments of the invention provide more medium filter, including multi-medium filtering tank body and with it is described
The draining amount detecting device of multi-medium filtering tank body connection；
Wherein, the draining amount detecting device is used to detect the multi-medium filtering in more medium filter backwash process
The displacement of tank body.
Second aspect, the embodiments of the invention provide a kind of control method of more medium filter, the multi-medium filtering
Device includes multi-medium filtering tank body and the draining amount detecting device being connected with the multi-medium filtering tank body, the control method
Including：
Obtain the displacement in the draining amount detecting device；
When the displacement reaches default displacement, the more medium filter is controlled to carry out backwash operation.
Technical scheme provided in an embodiment of the present invention, including multi-medium filtering tank body and be connected with multi-medium filtering tank body
Draining amount detecting device, draining amount detecting device be used in more medium filter backwash process detect multi-medium filtering tank body
Displacement.In the above-mentioned technical solutions, multi-medium filtering tank body is detected in backwash process by draining amount detecting device
Displacement, the displacement of multi-medium filtering tank body can be accurately controlled, ensure that backwash process can be carried out sequentially, therefore effectively keep away
Liquid level can not rationally control and influence the situation generation of filter backwash effect after having exempted from more medium filter tank body draining,
Reach improvement more medium filter backwash effect, lift the beneficial effect of producing water water quality.
Brief description of the drawings
In order to clearly illustrate the technical scheme of exemplary embodiment of the present, below to needed for description embodiment
The accompanying drawing to be used does a simple introduction.Obviously, the accompanying drawing introduced is the part of the embodiment of the invention to be described
Accompanying drawing, rather than whole accompanying drawings, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of structural representation for more medium filter that the embodiment of the present invention one provides；
Fig. 2 is a kind of schematic flow sheet for multi-media filter control method that the embodiment of the present invention two provides；
Fig. 3 is a kind of schematic flow sheet for multi-media filter control method that the embodiment of the present invention three provides.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than full content are illustrate only in description, accompanying drawing.Exemplary reality is being discussed in greater detail
It should be mentioned that some exemplary embodiments are described as processing or the method described as flow chart before applying example.Although
Operations (or step) are described as the processing of order by flow chart, but many of which operation can be by concurrently, concurrently
Ground is implemented simultaneously.In addition, the order of operations can be rearranged.The processing when its operations are completed can be by
Terminate, it is also possible to the additional step being not included in accompanying drawing.
Embodiment one
Fig. 1 is a kind of structural representation for more medium filter that the embodiment of the present invention one provides.The present embodiment is applicable
In the situation for improving more medium filter backwash effect and producing water water quality.As shown in figure 1, the more medium filter 1 includes be situated between more
Matter filters tank body 10 and the draining flowmeter 20 being connected with multi-medium filtering tank body 10, wherein, draining flowmeter 20 is used
In the displacement that multi-medium filtering tank body 10 is detected in the backwash process of more medium filter 1.
For more medium filter 1 after using some cycles, filter layer (not shown) therein can retain and adsorb one
Quantitative debris and spot, this causes the effluent quality of more medium filter 1 to decline, and at this moment just needs to carry out backwash.During backwash,
Flow reversal makes filter layer expansion, suspended, filter material layer is cleaned simultaneously by means of flow shear and particles collision frictional force by filter material layer
Dirt in filtering layer is discharged.Optionally, backwash process generally comprises air backwash process, water backwash process, standing process and water
Just wash journey.
It should be noted that when carrying out air backwash, need have a certain amount of water, air in more medium filter 1
Can make during backwash because dustiness block and hardened filter layer becomes to expand, the filtrate in filter layer is in suspended state.To more
When medium filter 1 is passed through air and cleaned, because filter layer is immersed in water, bubble, filter layer can be produced in filter layer
Internal bubble one side is disperseed repeatedly, is simultaneously risen, and bubble can make filtrate be disturbed, and strengthen cleaning performance.If multimedium
The water shortage having in filter so that the filtrate on upper strata is not flooded profit, during being disturbed above and below filtering material particle,
Pollutant can not be excluded effectively, may be moved on the contrary to filter layer depths.Opposite, if having in more medium filter
Hypervolia, the expansion rate of filter layer may become big, and the possibility for the friction that causes to collide between filtering material particle reduces, dirty
It is difficult for drop-off to contaminate thing, influences whole backwash effect.Therefore, it is necessary to control in multi-medium filtering tank body 10 before backwash is carried out
Liquid level be maintained in a zone of reasonableness, ensure that backwash is smoothed out.
Exemplary, because the difference of influent quality, the filter layer retention of more medium filter 1 and the shape of absorption pollutant
Condition has larger difference, therefore, when production water carries out draining after terminating, by controlling water discharge time can not be by multimedium mistake
Liquid surface height controlling in filter 1 is in rational scope.In order to avoid the generation of such case, more medium filter 1 is realized
Draining liquid level is controllable, and it is most direct and effective method to control each displacement.Because multi-medium filtering tank body before draining
The volume V of interior 10 filtrate and water1It is certain, and the volume V of filtrate and water after draining every time2And certain, as long as therefore controlling
Make each displacement V, it is possible to which effectively control draining terminates the volume V of remaining water and filtrate in rear more medium filter1-V2,
Draining can be effectively controlled to terminate the liquid level in rear multi-medium filtering tank body 10.Therefore it is being situated between in the embodiment of the present invention more
The outside of matter filtering tank body 10 is provided with a draining flowmeter 20 being connected with more medium filter tank body 10, passes through draining
Flowmeter 20 is controlled to liquid level after the draining in multi-medium filtering tank body 10.It is direct by draining flowmeter 20
Detect the displacement of volume of multi-medium filtering tank body 10 rather than the displacement hull of multi-medium filtering tank body 10 is controlled by water discharge time
Product, ensure displacement of volume precise control, avoid because of multi-medium filtering tank body 10 in identical water discharge time caused by influent quality difference
Displacement of volume difference the problem of, ensure that the liquid level after draining in multi-medium filtering tank body 10 is maintained at a reasonable model
In enclosing, ensure that backwash process can be smoothed out, and ensure backwash effect.
The embodiments of the invention provide a kind of more medium filter 1, including multi-medium filtering tank body 10 and and multimedium
The draining amount detecting device 20 of tank body connection is filtered, wherein, draining amount detecting device 20 is used in the backwash of more medium filter 1
The displacement of multi-medium filtering tank body 10 is detected in journey.The present embodiment can accurately control the draining of more medium filter tank body 10
Amount, so as to accurately control in more medium filter tank body 10 liquid level after draining, therefore more medium filter tank can be avoided
The situation that liquid level can not rationally control and influence filter backwash effect after the draining of body 10 occurs, and has reached improvement multimedium
Filter backwash effect, lift the beneficial effect of producing water water quality.
Optionally, on the basis of such scheme, draining amount detecting device 20 includes metering discharge casing or drain discharge
Meter.Fig. 1 is only illustrative so that draining amount detecting device 20 is metering displacement as an example.
Exemplary, if draining flowmeter 20 is drainage metering case, the water in multi-medium filtering tank body 10 can be discharged to
Measure in discharge casing, because before draining, the volume V of the reclaimed water of multi-medium filtering tank body 10 and filtrate1It is known, passes through survey
Displacement in gauge amount discharge casing, it is possible to determine the volume V of remaining water and filtrate in a variety of media filtration tank bodies 102,
Liquid level after draining can be determined in multi-medium filtering tank body 10.
Likewise, if draining flowmeter 20 is drain flow-meter, displacement directly can be determined by drain flow-meter,
So that it is determined that liquid level after draining in multi-medium filtering tank body 10.
Optionally, on the basis of such scheme, liquid level detection gauge is provided with the metering discharge casing, passes through the liquid
Position detection meter detects the displacement of the multi-medium filtering tank body 10.
Exemplary, if being further detailed exemplified by measuring discharge casing, liquid can be set on drainage metering case
Position detection meter, for detecting the displacement of multi-medium filtering tank body 10, ensure that displacement detection is accurate.
Optionally, on the basis of such scheme, the liquid level detection gauge includes Floating Ball Liquid Level detection meter, pressure liquid level inspection
Survey meter or supersonic liquid level detection meter.
It should be noted that liquid level detection gauge can also be the other kinds of liquid in addition to above-mentioned three kinds of liquid level detection gauges
Position detection meter, as long as the function of level sensing can be realized, is not limited the type of liquid level detection gauge at this.
Exemplary, it is further detailed exemplified by measuring discharge casing, if the liquid level detection gauge in drainage metering case
Detect and count for floating ball type liquid level, the floating ball type liquid level settable upper floating ball of detection meter and lower ball float, and by upper floating ball and float downward
Ball action come judge displacement number.What the shape due to measuring discharge casing was to determine, its floor space is certain value, is passed through
The volume V of the reclaimed water of multi-medium filtering tank body 10 and filtrate before draining1, the body of the reclaimed water of multi-medium filtering tank body 10 and filtrate after draining
Product V2And the floor space of metering discharge casing can calculate the value of displacement, to be carried out to the position of upper floating ball and lower ball float
Rationally set, during ensureing that upper floating ball and lower ball float act, the displacement V=V in accurate control metering discharge casing1-V2, so as to
So that the liquid level after draining in multi-medium filtering tank body 10 is reasonable.
Exemplary, equally can be according to draining if the level sensing in metering discharge casing is calculated as pressure liquid level detection meter
The volume V of the preceding reclaimed water of multi-medium filtering tank body 10 and filtrate1, the volume V of the reclaimed water of multi-medium filtering tank body 10 and filtrate after draining2
And the floor space of metering discharge casing calculates the value V=V of displacement1-V2, to the pressure sensor in pressure liquid level detection meter
Residing level is rationally set, and to ensure pressure sensor when reaching a certain pressure value, drainage procedure stops, and closes
Reason control displacement.
Optionally, on the basis of such scheme, with continued reference to Fig. 1, more medium filter 1 also includes and multi-medium filtering
The current flow pipe that tank body 10 connects and the control valve being arranged on the current flow pipe；
Specifically, the current flow pipe includes raw water water inlet pipe 31, water producing pipe 32, backwash water inlet pipe 33, backwash row
Water pipe 34, just washing drainpipe 35, backwash air inlet pipe 36, blast pipe 37, draining amount detecting device connecting tube 38 and displacement inspection
Survey device drainpipe 39；
The control valve includes the raw water water intaking valve 41 being arranged on raw water water inlet pipe 31, the production being arranged on water producing pipe 32
Water valve 42, the backwash water intaking valve 43 being arranged on backwash water inlet pipe 33, the backwash draining valve 44 being arranged on backwash drainpipe 34,
It is arranged on and just washes just washing draining valve 45, the intake valve being arranged in backwash air inlet pipe 36 46, being arranged on exhaust on drainpipe 35
Air bleeding valve 47 on pipe 37, the first draining valve 48 being arranged in draining amount detecting device connecting tube 38 and it is arranged on displacement
The second draining valve 49 on detection means drainpipe 39；
Draining amount detecting device 20 is connected with multi-medium filtering tank body 10 by draining amount detecting device connecting tube 38, draining
Amount detecting device 20 passes through the draining of draining amount detecting device drainpipe 39.
With continued reference to Fig. 1, the position of draining amount detecting device 20 can be arranged at the lower section of multi-medium filtering tank body 10.With
Illustrated exemplified by metering discharge casing, the general position of multi-medium filtering tank body 10 is higher, and metering discharge casing is during installation
It is necessary to ensure that the height of metering discharge casing upper floating ball is not higher than the liquid level after the draining of multi-medium filtering tank body 10, ensures be situated between more
Water in matter filtering tank body 10 can smoothly be discharged into metering discharge casing.
It should be noted that the above-mentioned current flow pipe referring to being connected with multi-medium filtering tank body 10 and being arranged at institute
The control valve on current flow pipe is stated, not the whole pipelines and control valve in more medium filter 1, in order to ensure multimedium
The normal work of filter 1 and realize necessary function, also exist some other pipelines, control valve, instrument, cloth water assembly and
The associated components such as support component.
Embodiment two
A kind of schematic flow sheet for multi-media filter control method that Fig. 2 provides for the embodiment of the present invention two, this implementation
Example is applicable to improve the situation of more medium filter backwash effect and producing water water quality.Control method described in the embodiment of the present invention
Suitable for the more medium filter 1 described in above-described embodiment, more medium filter 1 includes multi-medium filtering tank body 10 and is situated between with morely
The draining amount detecting device 20 that matter filtering tank body 10 connects.As shown in Fig. 2 the technical scheme that the present embodiment provides is specific as follows：
Displacement in S110, acquisition draining amount detecting device 20.
Exemplary, the displacement in draining amount detecting device 20 is detected.More medium filter 1 is carrying out backwash
When, it is necessary to first draining, ensure there is a certain amount of water in multi-medium filtering tank body 10, that is, ensure multi-medium filtering tank body after draining
10 liquid levels are in rational position.Liquid level only after draining in multi-medium filtering tank body 10 is in zone of reasonableness,
Can make to collide between filtering material particle during air backwash friction probability it is maximum, pollutant is more easy to fall off, air backwash
Effect could be optimal, so as to lift the cleaning performance of whole backwash process, ensure producing water water quality.
S120, when displacement reaches default displacement, control more medium filter 1 carry out backwash operation.
Exemplary, displacement V refers to before draining the volume V of filtrate and water in more medium filter1, with being filtered after draining
The volume V of material and water2Difference, i.e. V=V1-V2.As it was previously stated, the liquid level of multi-medium filtering tank body 10 needs after draining
In rational position, i.e., the volume V of filtrate and water after draining2Need to be in rational scope.For a certain specific multimedium
Filter, this scope are it is believed that therefore, and default displacement V ' just refers to before draining filtrate in more medium filter
With the volume V of water1, with the volume V of filtrate and water after the draining that is determined according to actual conditions2' difference between the two, i.e. V '=
V1-V2’。
Backwash operation, air backwash is generally comprised, waterpower backwash is stood, the steps such as waterpower is just being washed.Air backwash and waterpower
Backwash can expand filter layer, and in the presence of air and water, slight disturbance occurs for filter layer, and filtering material particle collision rubs
Wipe, pollutant is come off.During backwash, filtrate is mixing, and the purpose of standing is to make the filtrate of filter layer under gravity
Again be layered, due to the granularity of each filtrate and the difference of proportion, its sinking speed is different, therefore the overwhelming majority be all by granularity or
Proportion is layered, therefore its filtrate is also layering, but this layering is not absolute, be relative layering.
The control method of the more medium filter provided in the present embodiment, obtain the draining in draining amount detecting device 20
Amount, when displacement reaches default displacement, control more medium filter carries out backwash operation.The present embodiment can be controlled accurately
The displacement of more medium filter tank body, so as to accurately control in more medium filter tank body liquid level after draining, therefore can
To avoid the situation that liquid level can not rationally control and influence filter backwash effect after more medium filter tank body draining from sending out
It is raw, reach improvement more medium filter backwash effect, lift the beneficial effect of producing water water quality.
Embodiment three
Fig. 3 is a kind of schematic flow sheet for multi-media filter control method that the embodiment of the present invention three provides.The present invention
Embodiment is improved based on listing embodiment on the basis of above-described embodiment.Specifically, the embodiment of the present invention provides
Control method be applied to more medium filter 1 described in above-described embodiment, wherein, more medium filter 1 also includes and is situated between more
The matter filtering tank body 10 current flow pipe connected and the control valve being arranged on the current flow pipe；
Specifically, the current flow pipe includes raw water water inlet pipe 31, water producing pipe 32, backwash water inlet pipe 33, backwash row
Water pipe 34, just washing drainpipe 35, backwash air inlet pipe 36, blast pipe 37, draining amount detecting device connecting tube 38 and displacement inspection
Survey device drainpipe 39；
The control valve includes the raw water water intaking valve 41 being arranged on raw water water inlet pipe 31, the production being arranged on water producing pipe 32
Water valve 42, the backwash water intaking valve 43 being arranged on backwash water inlet pipe 33, the backwash draining valve 44 being arranged on backwash drainpipe 34,
It is arranged on and just washes just washing draining valve 45, the intake valve being arranged in backwash air inlet pipe 36 46, being arranged on exhaust on drainpipe 35
Air bleeding valve 47 on pipe 37, the first draining valve 48 being arranged in draining amount detecting device connecting tube 38 and it is arranged on displacement
The second draining valve 49 on detection means drainpipe 39；
Draining amount detecting device 20 is connected with multi-medium filtering tank body 10 by draining amount detecting device connecting tube 38, draining
Amount detecting device 20 passes through the draining of draining amount detecting device drainpipe 39.Specifically, multimedium mistake provided in an embodiment of the present invention
The control method of filter can include：
S210, the draining valve 48 of air bleeding valve 47 and first is opened, control the water in multi-medium filtering tank body 1 to flow into displacement inspection
Survey device 20.
Exemplary, for the control method of more medium filter 1, the present embodiment is carried out specifically exemplified by measuring discharge casing
Explanation.
More medium filter 1 normally produces water, the default production water time can be set during normally production water, when multimedium mistake
When the production water time of filter 1 reaches the default production water time, more medium filter 1 is automatically stopped production water, into backwash stage；Can be with
Be during more medium filter 1 normally produces water while detect producing water water quality, when the production water time reach the default production water time or
When person detects that producing water water quality is undesirable, more medium filter 1 is automatically stopped production water, into backwash stage；Or more Jie
Mass filter 1 normally produces water, until water quality is undesirable, more medium filter 1 is automatically stopped production water, into backwash stage.
Determine whether the producing water water quality of more medium filter 1 is qualified, can be to pollution index (the Silting Density of output water
Index, SDI) value detected, when SDI is more than a certain numerical value, confirm that the water quality of output water is unqualified, it is necessary to multimedium
The filter layer of filter 1 carries out backwash.
It should be noted that default production water time and influent quality, the volume of multi-medium filtering tank body 10, multi-medium filtering
The other factors such as volume of filter layer are relevant in tank body 10.It is understood that influent quality is poorer, multi-medium filtering tank body 10
Volume it is bigger, or the volume of filter layer is smaller, and the time that more medium filter 1 works under normally production water state is shorter,
The number for needing to carry out filter layer backwash can also increase.Therefore the default production water time can be configured according to actual conditions,
Do not limit herein.
When producing water water quality is judged as unqualified, backwash mode is automatically switched to, backwash mode is drainage procedure first,
When carrying out draining, it is necessary to open the draining valve 48 of air bleeding valve 47 and first.Multi-medium filtering tank can be ensured by opening air bleeding valve 47
Air pressure in body 10 is consistent with atmospheric pressure, can accelerate the drainage speed of multi-medium filtering tank 10, and the first draining valve 48 is set
Put in draining amount detecting device connecting tube 38, the water discharged in multi-medium filtering tank body 10 can be directly entered drainage metering
Case.
Displacement in S220, acquisition draining amount detecting device 20.
S230, when the liquid level detection gauge detects that liquid level in the draining amount detecting device reaches predeterminated position,
Close the first draining valve 48.
Exemplary, predeterminated position refers to a certain position in draining amount detecting device, corresponds to when in this position
Displacement just make it that liquid level is in rational position, such as multi-medium filtering tank after draining in multi-medium filtering tank body 10
Liquid level is located at the superiors' filter layer 10-15cm liquid levels after draining in body 10.When detecting in draining amount detecting device 20
Liquid level when reaching default position, close the first draining valve 48, drainage procedure stops.
S240, intake valve 46 is opened, control air enters multi-medium filtering tank body 10 by backwash air inlet pipe 36 and carries out sky
After gas backwash to the first preset time, close intake valve 46 and air bleeding valve 47, air backwash process terminate.
It is exemplary, time of air backwash in some time range in the case of best results, the first preset time
Refer to that cleaning performance reaches the optimal time.It should be noted that the first preset time and the volume of multi-medium filtering tank body 10
And the volume of filter layer is related, the embodiment of the present invention is to the first preset time without limiting.After drain step terminates, open
Intake valve 46, air bleeding valve 47 and air blower (air blower is connected with backwash air inlet pipe 36, not shown in figure) are opened, with certain pressure
Air is passed through to multi-medium filtering tank body 10, air is entered in multi-medium filtering tank body 10 by backwash air inlet pipe 36, and is passed through
Filter layer, the top of filter tank body 10 is largely come together in, discharged by air bleeding valve 47, in the presence of air, filter layer
In filtrate expansion, hole becomes big, continues this step to the first preset time, be then shut off intake valve 46 and air bleeding valve 47, no
Air is passed through again, terminates backwash process.
It should be noted that, it is necessary to intake valve 46 and air bleeding valve 47 be opened simultaneously, due in step in air backwash process
In rapid S230, the first draining valve 48 is only closed, and is not off air bleeding valve 47, therefore in step S240, it is only necessary to individually
It is then turned on intake valve 46.Likewise, the first draining valve 48 and air bleeding valve 47 can also be simultaneously closed off in step S230,
In step S240, while open intake valve 46 and air bleeding valve 47.As long as ensure to be vented in drainage procedure and air backwash process
Valve 47 is in opening, is not limited for the sequencing for opening air bleeding valve 47.
S250, backwash water intaking valve 43 and backwash draining valve 44 are opened, control current enter more Jie by backwash water inlet pipe 33
After the matter filtering progress of tank body 10 hydraulic reverse is washed till the second preset time, control current are flowed out by backwash drainpipe 34, are closed anti-
Water intaking valve 43 and backwash draining valve 44 are washed, waterpower backwash process terminates.
It is exemplary, time of waterpower backwash in some time range in the case of best results, the second preset time
Refer to that cleaning performance reaches the optimal time, likewise, the second preset time and the volume and mistake of multi-medium filtering tank body 10
The volume of filtering layer is related, and the embodiment of the present invention is to the second preset time without limiting.After air backwash process terminates, carry out
Waterpower backwash, open backwashing pump (backwashing pump is connected with backwash water inlet pipe 33, not shown in figure), backwash water intaking valve 43 and backwash row
Water valve 44, with certain hydraulic pressure, the water flowing into multi-medium filtering tank body 10, it will can be peeled off during air backwash from filtering material particle
The contaminant particle to get off is taken out of from filter layer, and suspension is formed in water, can by hole larger between filter layer,
Discharged through backwash drainpipe 34.Hydraulic reverse is washed till the second preset time, and most of pollutant in filter layer can be discharged, now
Backwash water intaking valve 43 and backwash draining valve 44 can be closed, waterpower backwash process terminates.
S260, the preset time of more medium filter 1 to the 3rd is stood, standing process terminates
Exemplary, after air backwash and waterpower backwash, the filtrate in filter layer is to mix, the purpose of standing
It is that the filtrate for making filter layer is layered again under gravity, due to the granularity of each filtrate and the difference of proportion, it settles speed
Degree is different, therefore the overwhelming majority is layered by granularity or proportion, therefore its filtrate is also layering, but this layering is not
It is absolute, is relative layering.The time of standing filtrate layered effect in some time range is optimal, and the 3rd is default
Time refers to that filtrate layered effect reaches the optimal time, likewise, the 3rd preset time and the body of multi-medium filtering tank body 10
The filtrate species and proportion of the volume and filter layer of product and filter layer are related, the embodiment of the present invention to the 3rd preset time not
It is defined.Filtrate is stood to the 3rd preset time, and when filtrate layered effect is optimal, standing process terminates.
S270, open raw water water intaking valve 41 and just wash draining valve 45, control current enter more Jie by raw water water inlet pipe 31
After the progress of matter filtering tank 10 waterpower is just being washed till the 4th preset time, control current are flowed out by just washing drainpipe 35, close raw water
Water intaking valve 41 and draining valve 45 is just washed, the backwash operation of more medium filter 1 terminates, and waterpower is just being washed journey and terminated.
Exemplary, after air backwash, waterpower backwash and standing process terminate, carry out waterpower and just wash journey, waterpower
Just wash journey be also required to continue for some time, the effect that waterpower is just being washed can be only achieved most preferably, corresponding to this best results when
Between be the 4th preset time, the embodiment of the present invention to the 4th preset time without limit.After standing process terminates, open
Raw water pump (raw water pump is connected with raw water water inlet pipe 31, not shown in figure), raw water water intaking valve 41 and draining valve 45 is just washed, raw water warp
Raw water water inlet pipe 31 enters multi-medium filtering tank body 10, is lost when flowing through filter layer 30, air backwash and waterpower backwash from top to bottom
The bubble and impurity stayed in filter layer can be discharged with dampening through just washing drainpipe 35.The time that waterpower is just being washed continues to that the 4th is pre-
If the time, the cleaning performance that waterpower is just being washed is best, now closes raw water water intaking valve 41 and just washes drain valve 45, waterpower just washes journey
Terminate, more medium filter 1 enters production water holding state.
The control method for the more medium filter that the present embodiment provides, the multimedium provided with any embodiment of the present invention
Filter belongs to same inventive concept, available for more medium filter provided in an embodiment of the present invention is controlled, possesses corresponding work(
Energy and beneficial effect.
Optionally, on the basis of above-mentioned technical proposal, liquid level detection gauge includes ball float detection meter, when the level sensing
When meter detects that the liquid level in the draining amount detecting device reaches predeterminated position, the first draining valve 48 is closed, including：
When the liquid level in the metering discharge casing makes the ball float action in the ball float detection meter, the displacement is determined
Liquid level in detection means reaches predeterminated position, closes the first draining valve 48.
Exemplary, if draining amount detecting device 20 is drainage metering case, its liquid level detection gauge can be ball float detection meter,
Upper floating ball and lower ball float, the displacement that the position of upper floating ball is as needed is set to be adjusted in drainage metering case, upper floating ball
Position it is corresponding with the position of default displacement.When measuring the liquid level in discharge casing and rising to the position of upper floating ball, represent
Reach default displacement, now upper floating ball can be acted, and the mark terminated as drainage procedure is acted using this.
Optionally, on the basis of above-mentioned technical proposal, in addition to draining amount detecting device drainage procedure；Wherein, draining
The drainage procedure of amount detecting device 20 includes：
The second draining valve 49 is opened, controls the water in draining amount detecting device 20 to pass through draining amount detecting device drainpipe 39
Discharge.
It is exemplary, when draining amount detecting device 20 is that metering discharge casing is, the draining into metering discharge casing, when reaching
Drainage procedure stops during default displacement.Water in metering discharge casing needs to empty in order to use next time.Emptying metering row
Open the second draining valve 49 during water tank, the water in drainage metering case is discharged through draining amount detecting device drainpipe 39.
Optionally, on the basis of above-mentioned technical proposal, the drainage procedure of draining amount detecting device 20 and air backwash process,
Waterpower backwash process, standing process or waterpower are just being washed journey and carried out simultaneously.
It is exemplary, when draining amount detecting device 20 for metering discharge casing when, the process of emptying metering discharge casing can be with
Air backwash process, waterpower backwash process, standing process or waterpower just wash during one or more and meanwhile carry out, can
The time of whole backwash process is reduced, improves production efficiency.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (11)
- A kind of 1. more medium filter, it is characterised in that including multi-medium filtering tank body and with the multi-medium filtering tank body The draining amount detecting device of connection；Wherein, the draining amount detecting device is used to detect the multi-medium filtering tank body in more medium filter backwash process Displacement.
- 2. more medium filter according to claim 1, it is characterised in that the draining amount detecting device includes metering and arranged Water tank or drain flow-meter.
- 3. more medium filter according to claim 2, it is characterised in that be provided with liquid level inspection on the metering discharge casing Meter is surveyed, the displacement of the multi-medium filtering tank body is detected by the liquid level detection gauge.
- 4. more medium filter according to claim 3, it is characterised in that the liquid level detection gauge is examined including Floating Ball Liquid Level Survey meter, pressure liquid level detection meter or supersonic liquid level detection meter.
- 5. more medium filter according to claim 1, it is characterised in that also include connecting with the multi-medium filtering tank body The current flow pipe connect and the control valve being arranged on the current flow pipe；The current flow pipe includes raw water water inlet pipe, water producing pipe, backwash water inlet pipe, backwash drainpipe, is just washing drainpipe, be anti- Wash air inlet pipe, blast pipe, draining amount detecting device connecting tube and draining amount detecting device drainpipe；The control valve includes the raw water water intaking valve being arranged on the raw water water inlet pipe, the production water being arranged on the water producing pipe Valve, the backwash water intaking valve being arranged on the backwash water inlet pipe, the backwash draining valve being arranged on the backwash drainpipe, setting Just washing draining valve, the intake valve being arranged in the backwash air inlet pipe, be arranged on the exhaust on drainpipe is just being washed described Air bleeding valve on pipe, the first draining valve being arranged in the draining amount detecting device connecting tube and it is arranged on the displacement The second draining valve on detection means drainpipe；The draining amount detecting device is connected with the multi-medium filtering tank body by the draining amount detecting device connecting tube, institute State draining amount detecting device and pass through the draining amount detecting device drainpipe draining.
- 6. a kind of control method of more medium filter, described for the more medium filter described in claim any one of 1-5 More medium filter includes multi-medium filtering tank body and the draining amount detecting device being connected with the multi-medium filtering tank body, its It is characterised by, including：Obtain the displacement in the draining amount detecting device；When the displacement reaches default displacement, the more medium filter is controlled to carry out backwash operation.
- 7. control method according to claim 6, it is characterised in that the more medium filter also includes and more Jie The current flow pipe of matter filtering tank body connection and the control valve being arranged on the current flow pipe；The current flow pipe includes raw water water inlet pipe, water producing pipe, backwash water inlet pipe, backwash drainpipe, is just washing drainpipe, be anti- Wash air inlet pipe, blast pipe, draining amount detecting device connecting tube and draining amount detecting device drainpipe；The control valve includes the raw water water intaking valve being arranged on the raw water water inlet pipe, the production water being arranged on the water producing pipe Valve, the backwash water intaking valve being arranged on the backwash water inlet pipe, the backwash draining valve being arranged on the backwash drainpipe, setting Just washing draining valve, the intake valve being arranged in the backwash air inlet pipe, be arranged on the exhaust on drainpipe is just being washed described Air bleeding valve on pipe, the first draining valve being arranged in the draining amount detecting device connecting tube and it is arranged on the displacement The second draining valve on detection means drainpipe；The draining amount detecting device is connected with the multi-medium filtering tank body by the draining amount detecting device connecting tube, institute State draining amount detecting device and pass through the draining amount detecting device drainpipe draining；The displacement obtained in the draining amount detecting device, including：The air bleeding valve and first draining valve are opened, controls the water in the multi-medium filtering tank body to flow into the displacement Detection means；Obtain the displacement in the draining amount detecting device.
- 8. control method according to claim 7, it is characterised in that the draining amount detecting device includes metering draining Case, described measure is provided with liquid level detection gauge on discharge casing, when the displacement reaches default displacement, controls more Jie Mass filter carries out backwash operation, including：When the liquid level detection gauge detects that liquid level in the draining amount detecting device reaches predeterminated position, described the is closed One draining valve；The intake valve is opened, control air is anti-into multi-medium filtering tank body progress air by the backwash air inlet pipe After being washed till the first preset time, the intake valve and the air bleeding valve are closed, air backwash process terminates；The backwash water intaking valve and the backwash draining valve are opened, control current enter more Jie by the backwash water inlet pipe After matter filtering tank body progress hydraulic reverse is washed till the second preset time, control current are flowed out by the backwash drainpipe, close institute Backwash water intaking valve and the backwash draining valve are stated, waterpower backwash process terminates；The more medium filter to the 3rd preset time, standing process is stood to terminate；Open the raw water water intaking valve and it is described just wash draining valve, control current enter described be situated between more by the raw water water inlet pipe After matter filtering tank progress waterpower is just being washed till the 4th preset time, control current are flowed out by the drainpipe of just washing, described in closing Raw water water intaking valve and it is described just wash draining valve, the more medium filter backwash operation terminates, waterpower just wash journey terminate.
- 9. control method according to claim 8, it is characterised in that the liquid level detection gauge includes ball float detection meter, when When the liquid level detection gauge detects that the liquid level in the draining amount detecting device reaches predeterminated position, first draining is closed Valve, including：When the liquid level in the metering discharge casing makes the ball float action in the ball float detection meter, the displacement detection is determined Liquid level in device reaches predeterminated position, closes first draining valve.
- 10. control method according to claim 8, it is characterised in that also including draining amount detecting device drainage procedure；Wherein, the draining amount detecting device drainage procedure includes：Second draining valve is opened, controls the water in the draining amount detecting device to pass through the draining amount detecting device draining Pipe is discharged.
- 11. control method according to claim 10, it is characterised in that the draining amount detecting device drainage procedure and institute Air backwash process, waterpower backwash process, standing process or waterpower is stated just to wash journey while carrying out.
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| CN201710873417.2A CN107583319A (en) | 2017-09-25 | 2017-09-25 | A kind of more medium filter and its control method |
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| CN201710873417.2A CN107583319A (en) | 2017-09-25 | 2017-09-25 | A kind of more medium filter and its control method |
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| CN201710873417.2A Pending CN107583319A (en) | 2017-09-25 | 2017-09-25 | A kind of more medium filter and its control method |
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| CN113476942A (en) * | 2021-05-25 | 2021-10-08 | 西安热工研究院有限公司 | Filter backwashing system, process and control method |
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