CN101632017B - Apparatus for sensing precipitation density of sludge in waste water treatment tank and method therefor - Google Patents
Apparatus for sensing precipitation density of sludge in waste water treatment tank and method therefor Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000001556 precipitation Methods 0.000 title claims abstract description 15
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- 238000004065 wastewater treatment Methods 0.000 title abstract description 10
- 239000002351 wastewater Substances 0.000 claims abstract description 24
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- 238000000746 purification Methods 0.000 claims description 60
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
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- General Health & Medical Sciences (AREA)
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- Immunology (AREA)
- Pathology (AREA)
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Activated Sludge Processes (AREA)
Abstract
The present invention relates to an apparatus for sensing precipitation density of sludge in a wastewater treatment tank, more particularly to an apparatus and method for precisely taking density of sludge precipitated in a wastewater treatment tank without being contaminated by sludge. The present invention of an apparatus for sensing precipitation density of sludge in a waste water treatment tank comprises a container which is tube-shaped with a bottom thereof open and submerged in wastewater as filled with gas therein; and a sensor which is installed in the space in the container, and senses sludge density as not directly contacting with wastewater.
Description
Technical field
The present invention relates to a kind of equipment of the precipitation density that is used for the mud in the sensing purification tank for liquid waste, more particularly, relate to a kind of equipment and method that is used for accurately obtaining the density of the mud that in purification tank for liquid waste, precipitates and is not polluted by mud.
Background technology
As the well-known, the organism in life or the industrial waste water is the environmental contaminants of polluted river water or lake water.Therefore, pollute in order to reduce this water, control makes the waste water that purifies back release in Waste Water Treatment be lower than emission limit, thereby reduces BOD as far as possible (BOD).
Usually, the processing in the Waste Water Treatment is divided into three steps: be pretreated first step, be main second step of handling, and be the third step of aftertreatment.Being in the pretreated first step, handle floating solid or suspended solid by filter screen and precipitate flotation; Be in main second step of handling, by condense and precipitation, electrocoagulation, neutralization, filtration, activated sludge process, trickling filtration and stabilization pond or oxidation pond handle insoluble colloid, solubility colloid and harmful organic substance (BOD, COD); And in the third step of aftertreatment, by denitrogenation, condense and precipitation, filtration, zeyssatite, activated charcoal, evaporation, flocculation, extraction, counter-infiltration, electrodialysis, ion-exchange or the like are handled nitrogen, phosphorus, suspended solid, organism, and inorganic salts etc.
This Waste Water Treatment has the unit process of condensing and precipitating basically in purification tank for liquid waste in all three steps.And most water pollutants are handled with physicochemical mode, biochemical mode and other mode; Precipitate by flocculating setting and compression subsequently; And the pollutant of precipitation is discharged to hydroextractor to dewater and to be disposed by burning, landfill or ocean dumping.
Usually, a plurality of mud density sensors are installed in the differing heights in the purification tank for liquid waste of Waste Water Treatment.And the bottom of purification tank for liquid waste has the mud pumping equipment, when the mud density that senses with convenient sensor surpasses set-point the mud of precipitation is extracted out.
Density sensor comprises: be used for luminous luminescence unit; Light receiving unit sends and enters this light receiving unit by the light of mud reflection from luminescence unit; And optical sensor, described optical sensor is measured mud density by the light intensity that enters light receiving unit.
Yet the conventional mud density sensor that is used for Waste Water Treatment can only be measured the density of point of fixity at the ad-hoc location of purification tank for liquid waste.Therefore, generally speaking be difficult to accurately measure the state of mud in the purification tank for liquid waste.In addition, when making owing to the stirring in the purification tank for liquid waste between the upper and lower when density taking place reversing, will cause discharging mud in inapt density.
In addition, because the luminescence unit of conventional mud density sensor is mounted in purification tank for liquid waste with light receiving unit and directly contacts with mud, it is big that mud becomes on luminescence unit that sticks to sensor and light receiving unit the time, thereby stop the sensor absorbing light and the density measurement that leads to errors.
Therefore, clean conventional mud density sensor termly and stick to its lip-deep mud, and again it is installed in the purification tank for liquid waste with removal.
Yet it is time-consuming reinstalling, because be difficult to sensor is separated and changed from purification tank for liquid waste, and to reinstall not be Wonderful Job, because setter must stir sludge blanket to take out sensor and sensor is reinstalled there.In order to address this is that, developed on the surface of sensing cell, have the rotation wiper sensor so that in settling basin, carry out automated cleaning, but this sensor also can gather the pollution that is caused by long period of operation inevitably.
In addition, the other method of measuring mud density is to analyze from the mud sample of a certain degree of depth collecting precipitation of purification tank for liquid waste and to it.Yet because the pollution of collection tube and sampling receptacle, this method is carried out and need for a long time and be difficult to real-time density measurement.
Summary of the invention
Therefore, consider the problems referred to above that occur in the prior art and made the present invention, and the purpose of this invention is to provide a kind of equipment and method that is used for the mud density in the sensing purification tank for liquid waste, this equipment and method can be measured mud density to the bottom by water level from the top of purification tank for liquid waste, and the state of the mud in the sensing purification tank for liquid waste, thereby make it possible to easily handle mud.
Another object of the present invention provides a kind of equipment and method that is used for the mud density in the sensing purification tank for liquid waste, this equipment and method can make the luminescence unit of sensor and light receiving unit avoid polluting, thereby can realize the accurate measurement of mud density and not need to clean sensor.
Equipment by a kind of precipitation density that is used for the mud in the sensing purification tank for liquid waste can be realized above-mentioned purpose of the present invention.Described equipment comprises: container, described container are the tubulose of bottom-open, and are filled with therein under the situation of gas and are immersed in the waste water; And sensor, described sensor is installed in the space in the described container 101, and under the situation that does not directly contact waste water sensing mud density.
Method by a kind of precipitation density that is used for the mud in the sensing purification tank for liquid waste also can realize above-mentioned purpose of the present invention.Said method comprising the steps of: mobile step in described mobile step, allows the top of density sensing cell from purification tank for liquid waste to move to set a distance to the bottom, and stops at the measurement point in the described purification tank for liquid waste; Stabilizing step, in described stabilizing step, after described density sensing cell stopped at described measurement point, described density sensing cell kept the dormant state setting-up time; And measuring process, in described measuring process, after described setting-up time is gone over, described density sensing cell is in the level measuring mud density of described measurement point, wherein repeat described mobile step, stabilizing step and measuring process in order, arrive last measurement point in the bottom of described purification tank for liquid waste up to described density sensing cell.
Because mud density sensing cell of the present invention can be measured accurate mud density by the water level of purification tank for liquid waste in the process that moves up and down in purification tank for liquid waste, therefore advantageous effects of the present invention is, can grasp the whole state of the mud density in the purification tank for liquid waste and carry out the process of discharging mud more accurately.
Advantageous effects of the present invention also is, sensor of the present invention can not obtain mud density under its luminescence unit and light receiving unit directly do not contact the situation of mud, thereby can prevent that mud from adhering on it.Because described sensor can be avoided polluting, even therefore after long-time the use, also needn't clean.
Description of drawings
Fig. 1 is a kind of cut-open view of embodiment of equipment that is used for sensing mud density according to application mud density sensing cell of the present invention;
Fig. 2 is the cut-open view of another embodiment of equipment that is used for sensing mud density according to application mud density sensing cell of the present invention;
Fig. 3 is the cut-open view according to a kind of embodiment of mud density sensing cell of the present invention;
Fig. 4 is the cut-open view according to another embodiment of mud density sensing cell of the present invention;
Fig. 5 is the cut-open view according to the another embodiment of mud density sensing cell of the present invention;
Fig. 6 is the process flow diagram that shows according to the embodiment of the method that is used for sensing mud density of the present invention; And
Fig. 7 is that expression enters the chart according to the signal of the light receiving unit of another embodiment of the equipment that is used for sensing mud density of the present invention.
Main Reference numeral is described
1: purification tank for liquid waste 2: inflow pipe 3: effuser 4: the mud vent pipe
5: extraction pump 6: valve 10: density sensing cell 20: controller
30: lifting unit 31: guiding frame 32: top sheave 33: lower sheave
34: be with 35: motor 101: container 102: sensor
103: luminescence unit 104: light receiving unit 105: the gas injection-tube
106: valve 107: light shield wall 108: the vibration barricade
Embodiment
Term that uses in instructions and the claim and speech should restrictedly not explained with common meaning or lexical meaning.But they should can suitably limit the notion of term in accordance with the inventor and explain so that describe the principle of his or she invention in the best way with meaning and the notion according to thought of the present invention.
Though described the present invention with reference to specific exemplary embodiments, the present invention can't help the restriction of described embodiment, but is only limited by claims.Should be appreciated that those skilled in the art to change or to revise described embodiment and do not depart from scope and spirit of the present invention.
Hereinafter, will be described in detail with reference to the attached drawings preferred implementation of the present invention.
Fig. 1 is a kind of cut-open view of embodiment of equipment that is used for sensing mud density according to application mud density sensing cell of the present invention.With reference to figure 1, purification tank for liquid waste 1 has: inflow pipe 2, described inflow pipe are positioned at a side on the top of purification tank for liquid waste, so that waste water flows in the purification tank for liquid waste; Effuser 3, described effuser is positioned at the opposite side on the top of purification tank for liquid waste, so that the supernatant liquor in the purification tank for liquid waste flows out; And mud vent pipe 4, extraction pump 5 and the valve 6 of a side that is positioned at the bottom of purification tank for liquid waste, so that the mud of sedimentation is discharged purification tank for liquid waste.
The inside of purification tank for liquid waste 1 can be divided into top supernatant layer W1, not have the middle part mud of the mud floating layer W2 and a bottom sludge settling layer W3 of sedimentation adrift.
In addition, the inside of purification tank for liquid waste 1 has the first density sensing cell 10a, the second density sensing cell 10b and the triple density sensing cell 10c that is mounted the density that is used for measuring mud, and each density sensing cell is electrically connected with real-time transmission measured value with controller 20.
The first density sensing cell 10a is used to check the pollution level of supernatant liquor and the second density sensing cell 10b that prevents to be caused by the differing from of amount of the light between daytime and night and the measuring error of triple density sensing cell 10c, this that is to say because by day or fine, the amount of light of light receiving unit that enters density sensing cell 10 is big, and at night or cloudy day, the amount of light of light receiving unit that enters density sensing cell 10 is little, so may there be mud density measure error in density sensing cell 10.
Therefore, the amount of the light that measures according to the first density sensing cell 10a of controller is proofreaied and correct the measured value that the second density sensing cell 10b and triple density sensing cell 10c are obtained.
Simultaneously, when the wavelength of used light source was in wavelength of visible light, the influence of external light source was inevitable; When the wavelength of used light source was in infrared ray or ultraviolet wavelength, the influence of external light source was avertible.In addition, in the time will being used as light source such as the diffuse type lamp of LED commonly used or Halogen lamp LED, not only the reflector space by means of the light source of mud increases, and the reflector space on the water surface also increases, and therefore increased the possibility that the light that only reflects by the stirring of the water surface directly enters the light receiving unit of sensor.In addition, when light source was laser, its high penetrability can prevent that with consistent direction stop signal is owing to the reflection of the water surface spreads apart.Therefore, when light source was infrared laser or Ultra-Violet Laser, the advantageous effects that it had was, the light diffusing influence that can reduce external light source and cause by the reflection of the water surface, thus obtain accurate mud density.
Led light source is adopted about the description of the embodiment of density sensing cell 10 in the back.
About being described below that the mud density measure that carries out in above-mentioned mud density sensor device and mud are discharged.
The waste water that enters in the purification tank for liquid waste 1 by inflow pipe 2 passes through assignment procedure, forms sludge settling then therein.At this moment, the second density sensing cell 10b and triple density sensing cell 10c measure the density of the mud of precipitation in real time.
Along with the carrying out of wastewater treatment process, sludge settling gets more and more and is increased by the density that the second density sensing cell 10b obtains.
When the mud density of being obtained by the second density sensing cell 10b surpassed setting value in the controller 20, controller 20 was opened valve 6a and is operated extraction pump 5 to discharge mud by mud vent pipe 4.
Along with mud is discharged the height step-down of sludge settling layer W3 by mud vent pipe 4; As sludge settling layer W3 during near the bottom of triple density sensing cell 10c, the density of being obtained by triple density sensing cell 10c descends rapidly.
Then, when controller 20 had obtained density that triple density sensing cell 10c obtained and is lower than the signal of the setting value in the controller, valve 6 cut out and the operation of extraction pump 5 stops, thereby stopped mud and discharge.
In purification tank for liquid waste 1, the operation of density sensing and extraction pump 5 repeats, to discharge mud.
Fig. 2 is the cut-open view of another embodiment of equipment that is used for sensing mud density according to application mud density sensing cell of the present invention.With reference to figure 2, purification tank for liquid waste 1 has: inflow pipe 2, described inflow pipe are positioned at a side on the top of purification tank for liquid waste, so that waste water flows in the purification tank for liquid waste; Effuser 3, described effuser is positioned at the opposite side on the top of purification tank for liquid waste, so that the supernatant liquor in the purification tank for liquid waste flows out; And mud vent pipe 4, extraction pump 5 and the valve 6 of a side that is positioned at the bottom of purification tank for liquid waste, so that the mud of sedimentation is discharged purification tank for liquid waste.
The inside of purification tank for liquid waste 1 can be divided into top supernatant layer W1, not have the middle part mud of the mud floating layer W2 and a bottom sludge settling layer W3 of sedimentation adrift.
In addition, a side of purification tank for liquid waste 1 is equipped with: density sensing cell 10 is used to measure the density of mud; With lifting unit 30, be used for moving up and down density sensing cell 10 along this lifting unit.Density sensing cell 10 is electrically connected with real-time transmission measured value with controller 20.
Height by waste water in the process that density sensing cell 10 moves up and down along lifting unit 30 in purification tank for liquid waste 1 obtains mud density.At this moment, the amount of the light of the light receiving unit of density sensing cell 10 by entering optical sensor is obtained mud density.
Certainly, lifting unit 30 can diversely be formed by using other linear motion device of knowing.
Because lifting unit 30 is immersed in the water, so lifting unit 30 is preferably made by etch-proof stainless steel or such as the resin of teflon.
Fig. 3 is the cut-open view according to a kind of embodiment of mud density sensing cell of the present invention.With reference to figure 3, density sensing cell 10 comprises: the tubular container 101 of bottom-open; Be fixedly mounted in the sensor in the container 101; Pressure maintenance device is used for by being expelled to the internal pressure that container 101 is kept container 101 as the gas of air.
Preferably, luminescence unit 103 is mounted to respect to light receiving unit 104 inclination certain angles.This is to send and from the water surface rather than by the amount that enters the light of light receiving unit 104 after mud (S) reflection in order to minimize from luminescence unit 103.
More particularly, when the light that sends from luminescence unit 103 ran into interface as the water surface, light was with the angle reflection identical with incident angle.Therefore, if luminescence unit 103 and light receiving unit 104 are installed abreast, then the light that vertically sends from luminescence unit 103 enters light receiving unit 104 probably after by water-reflected.And when luminescence unit 103 and light receiving unit 104 are installed at a certain angle obliquely, send obliquely and enter will significantly reducing of light receiving unit 104 by the light of water-reflected by luminescence unit 103.
In addition, light receiving unit 104 can have light shield wall 107, and this light shield wall extends downwards in the bottom of light receiving unit, enters light receiving unit with the light that prevents offside reflection.
Therefore, sensor 102 preferably is configured to make the light that sends, gone forward side by side into light receiving unit 104 by the inside surface reflection of the water surface or container 101 from luminescence unit 103 to minimize, and makes the light by the mud reflection optionally enter light receiving unit 104.
Simultaneously, because the gas in the container 101 can leave along with the past of time, so the pressure in the container 101 is with step-down.Even thereby will cause the measured value of water level rising and mud density also possible different under equal densities.
Therefore, preferably, in container 101, periodically or off and on provide gas by utilizing pressure maintenance device, thereby the pressure in the container 101 is maintained certain level.
This pressure maintenance device can comprise: the funnelform gas injection-tube 105 that is connected with container 101; The valve 106 that is used for opening/closing gas injection-tube 105; And provide the gas supply unit (not shown) of gas by gas injection-tube 105, wherein gas supply unit can comprise fan blower or pneumatic pump.
In addition, container 101 is equipped with level sensor 109 on the surface within it, so that come the opening of operation valve 106 by the water level in the Sensing container 101.When the reduction of the pressure in the container 101, when water level rises, level sensor 109 sensing SEA LEVEL VARIATION; Valve 106 is opened; And gas is fed in the container 101, thereby has increased the pressure in the container 101 and water level is reduced to given level.When level sensor 109 is installed in the container 101 as described above, not only can keeps the suitable water level in the container 101, and can prevent that also gas excessively is fed in the container 101.
Above-mentioned density sensing cell 10 following operations.
When the waste water that container 101 is placed on from the top in the purification tank for liquid waste 1 (with reference to figure 2), the inside of container 101 is filled with the gas such as air, and gaseous tension can be prevented sealing filling containers 101 and make water level remain on the bottom of container 101.
Then, the luminescence unit 103 of sensor 102 sends light, and the light that sends is reflected by the mud granule (S) that runs in the water surface or the water.As mentioned above, owing to have the reflection angle identical with incident angle by the light of water-reflected, therefore most light can not enter light receiving unit 104, but side direction is escaped or entered light receiving unit 104 by 107 preventions of light shield wall.And when light ran into mud granule (S), diffuse reflection can take place in it, thereby caused to be different from the angle reflection of incident angle.At this moment, only by the light of mud granule (S) vertical reflection can avoid being arranged on light receiving unit 104 the bottom light shield wall 107 and enter light receiving unit 104.
When the mud granule that has many precipitations in the waste water (S), the amount that enters the light of light receiving unit 104 by this diffuse reflection will increase; On the contrary, when only having the mud granule (S) of small amount of precipitate in the waste water, the amount that enters the light of light receiving unit 104 by this diffuse reflection will reduce.That is to say that the amount that enters the light of light receiving unit 104 is directly proportional with the quantity of mud granule.
Therefore, controller 20 can be measured mud density according to the amount of the light that enters light receiving unit 104.
Simultaneously, under the situation of 10 half submergence of density sensing cell rather than such whole submergence as shown in Figure 1, and at density sensing cell 10 under the situation of when lifting unit 30 moves, measuring mud density, the various factors that flows into such as lifting unit 30 vibrations or waste water will cause the waste water vibrations.This vibrations of waste water are passed to the water surface in the container 101, thereby will cause the container vibration.
When vibration takes place on the water surface in the container 101, sending the amount of going forward side by side into the light of light receiving unit 104 from luminescence unit 103 will change, thereby will cause the out of true of mud density to be measured.
Therefore, shown in another embodiment of the density sensing cell 10 among Fig. 4, container 101 can have vibration barricade 108, this vibration barricade is formed under the inside surface with container 101 leaves the situation in space in the lower space in the container 101, therefore can make the minimum vibration that is delivered to the water surface in the container.
According to the present invention, the luminescence unit 103 of density measure sensor 102 and light receiving unit 104 are arranged in the space that does not have waste water in the container 101, thereby directly do not contact waste water, and can not polluted by mud.
Fig. 5 is the cut-open view according to the another embodiment of mud density sensing cell of the present invention.With reference to figure 5, density sensing cell 10 comprises: upper container 111, this upper container are the tubulose of bottom-open, and are filled with therein under the situation of gas and are immersed in the waste water; With bottom container 112, this bottom container and upper container 111 combine separating under the situation of certain distance, and form airtight therein by sealing around it.
And the top of bottom container 112 has the oil reservoir 118 that forms with 1.6 times proportion greater than the proportion of water.Oil reservoir 118 forms the upper surface exposure and light can pass.Even mud granule (S) is near the top of oil reservoir 118, hydrophilic mud granule can not be attached on the hydrophobic oil reservoir 118 yet.Therefore, needn't clean density sensing cell 10.
Because the proportion of oil reservoir 118 is greater than water, so its top is whole or a part of opening wide can't cause it to float on the water, and oil reservoir 118 remains on the top of bottom container 112.
As for upper container 111, as describing in the embodiment of front, its inside is equipped with pressure maintenance device, i.e. gas injection-tube 115 and gas supply unit (not shown) are so that by keeping consistent pressure to its inner supply gas.
The light that almost vertically sends from luminescence unit 113 advances towards light receiving unit 114.At this moment, if there is mud granule (S) in the waste water between upper container 111 and bottom container 112, more then the light that sends from luminescence unit 113 will be reflected and can not enter light receiving unit 114 because of running into mud granule (S).In other words, owing to exist many mud granules (S),, will increase, and the amount that enters the light of light receiving unit 114 will reduce by the amount of the light of mud reflection promptly along with the increase of mud density.
In a word, entering the amount of light of light receiving unit 114 and the quantity of mud granule is inversely proportional to.And therefore controller 20 can measure mud density according to the amount of the light that enters light receiving unit 114.
Fig. 6 is the process flow diagram that illustrates according to the embodiment of the method that is used for sensing mud density of the present invention.Referring to figs. 2 and 6, use the method for sensing mud density of being used for of density sensing cell of the present invention as follows.
On the top that density sensing cell 10 is placed on purification tank for liquid waste 1 and after the motor 35 of lifting unit 30 applies control signal, top sheave 32 begins rotation, and is with 34 rotations successively, thereby makes density sensing cell 10 move down to set a distance.
When density sensing cell 10 moved down to set a distance, during for example mobile 30cm, motor 35 shut down and density sensing cell 10 is suspended on this point (S1).
Next, density sensing cell 10 density measurement and continue setting-up time (t) not; Perhaps controller 20 negligible density sensing signals and be in dormant state (S2).
Behind the setting-up time (t), density sensing cell 10 begins density measurements in the past; And controller 20 obtains and stores the mud density (S3) of this water level.
After having obtained the mud density of this water level, control signal is applied on the motor 35 of lifting unit 30 once more, so that motor 35 runnings, and density sensing cell 10 is moved down to set a distance to obtain mud density at next measurement point.
The density sensor device is by each level measuring in the purification tank for liquid waste 1 and store mud density, carries out this process as mentioned above once more, arrives the last water level of measuring up to density sensing cell 10.When the mud density of obtaining at a certain water level became setting value, described equipment was carried out suitable process, as operating extraction pump 5 to discharge mud.
When by density sensing cell 10 being moved when obtaining the density of each water level to set a distance, preferably, by periodically or off and in container 101, supplying gas, to keep the water level unanimity of container 101 bottoms that are formed on density sensing cell 10 such as air.
Simultaneously, when obtaining the mud density of each water level along with density sensing cell 10 to move down a step to set a distance, density sensing cell 10 can keep dormant state setting-up time (t), can not measure mud density once arriving designated water level.Its reason is in order to make density sensing cell 10 obtain stable measured value again after the vibration calmness of the water of container 101 (with reference to figure 3) bottom, and wherein this vibration takes place when density sensing cell 10 moves.
More particularly, when the operation of density sensing cell 10 by lifting unit 30 moves down, the vibration that is produced by the operate source of lifting unit 30 will make container 101 vibrations of density sensing cell 10 (with reference to figure 3), thereby will cause the water vibrations in the bottom of container 101.
If the water in the bottom of container 101 vibrations then will run into the water surface and enter light receiving unit 104 from the light that the luminescence unit 103 of sensor 102 sends, this will hinder accurately density measurement of sensor.
Fig. 7 illustrates the chart that enters according to the signal of the light receiving unit of another embodiment of the equipment that is used for sensing mud density of the present invention.With reference to figure 7, when density sensing cell 10 initial movable, the vibration on the water surface is very big, so that it is quite big to enter the quantitative changeization of light of light receiving unit 104.
When density sensing cell 10 moved to set a distance and stops, vibration calms down and measuring-signal becomes stable.
From time that density sensing cell 10 stops in the past behind the setting-up time (being 5 seconds among Fig. 7), become calmness and measuring-signal of the water surface shows sufficiently stable value.Then, controller 20 signal from input after setting-up time (t) finishes obtains mean value to calculate accurate more mud density.
Because density sensing cell 10 is measured mud density after moving to set a distance step by step and having the stabilization sub stage when keeping the dormant state certain hour subsequently, thereby make it accurately measure mud density, and can promote technology by the whole state of the mud density in the real-time grasp purification tank for liquid waste 1 by the water level of purification tank for liquid waste 1.
Though described the present invention with reference to several preferred implementations, this description is can not be interpreted as limitation of the present invention for the present invention is described.Those skilled in the art can expect various modifications and variations, and do not depart from the scope of the present invention that limits as claims.
Claims (19)
1. the equipment of a precipitation density that is used for the mud in the sensing purification tank for liquid waste, this equipment comprises:
Container, this container are the tubulose of bottom-open, and are filled with therein under the situation of gas and are immersed in the waste water; And
Optical sensor, this optical sensor are installed in the space in the described container (101), and under the situation that does not directly contact waste water sensing mud density.
2. equipment according to claim 1, this equipment also comprises controller, this controller is electrically connected with described optical sensor, and the amount of the light by entering described optical sensor is measured mud density.
3. equipment according to claim 1, this equipment also comprises:
The density sensing cell, this density sensing cell comprises described container and described optical sensor, this density sensing cell is mounted to and can moves up and down in described purification tank for liquid waste, and can obtain mud density by water level in described purification tank for liquid waste in the process that moves up and down; And
Lifting unit, this lifting unit are used for moving up and down described density sensing cell.
4. according to any one the described equipment in the claim 1 to 3, wherein said optical sensor comprises:
The water surface that luminescence unit, this luminescence unit are used for forming in the bottom of described container sends light; And
Light receiving unit, this light receiving unit are used for for sending from described luminescence unit and entering wherein by running into the light that described undersurface mud reflects.
5. equipment according to claim 4, this equipment also comprises pressure maintenance device, this pressure maintenance device is used for directing injection of the gas into described container, so that keep consistent pressure in the space of described container.
6. equipment according to claim 5, wherein said pressure maintenance device comprises:
The gas injection-tube that funnelform and described container is connected;
The valve that is used for the described gas injection-tube of opening/closing; And
Come the gas supply unit of supply gas by described gas injection-tube.
7. equipment according to claim 6, wherein said pressure maintenance device also comprises level sensor, this level sensor is controlled the opening of described valve by the water level in the described container of sensing.
8. equipment according to claim 4, wherein said luminescence unit are mounted to respect to described light receiving unit inclination given angle.
9. equipment according to claim 4, wherein said light receiving unit have the light shield wall of downward extension, so that stop the light of offside reflection to enter.
10. equipment according to claim 4, this equipment is the involving vibrations barricade also, this vibration barricade is formed under the inside surface with described container leaves the situation in space in the lower space in the described container, thus the vibration on the water surface in the described container that prevents to cause by the vibrations of waste water.
11. according to any one the described equipment in the claim 1 to 3, wherein said container comprises:
Upper container, this upper container are the tubulose of bottom-open, and are filled with therein under the situation of gas and are immersed in the waste water; And
Bottom container, this bottom container combine with described upper container separating under the situation of certain distance with described upper container, and by seal this bottom container around make form in this bottom container airtight,
And described optical sensor comprises:
Luminescence unit, this luminescence unit are installed in the space of described bottom container, upwards to send light; And
Light receiving unit, this light receiving unit are installed in the space of described upper container, to receive the light that sends from described luminescence unit.
12. equipment according to claim 11, this equipment also comprises pressure maintenance device, and this pressure maintenance device is used for directing injection of the gas into described upper container, so that keep consistent pressure in the space of described upper container.
13. equipment according to claim 12, wherein said pressure maintenance device comprises:
The gas injection-tube that funnelform and described upper container is connected;
The valve that is used for the described gas injection-tube of opening/closing; And
Come the gas supply unit of supply gas by described gas injection-tube.
14. equipment according to claim 13, wherein said pressure maintenance device also comprises level sensor, and this level sensor is controlled the opening of described valve by the water level in the described upper container of sensing.
15. equipment according to claim 11, this equipment also comprises a plurality of coupling members, so that described upper container and described bottom container are coupled together.
16. equipment according to claim 11 is formed with oil reservoir in the top of wherein said bottom container, the proportion of this oil reservoir is greater than the proportion of water, and outside the upper surface of this oil reservoir is exposed to.
17. equipment according to claim 3, wherein said lifting unit comprises:
Guiding frame, this guiding frame vertically are installed in the described purification tank for liquid waste;
Top sheave and lower sheave, this top sheave and lower sheave are installed in the upper and lower of described guiding frame respectively;
Band, this band is positioned on described top sheave and the described lower sheave, and this is with and has tension force;
Web member, this web member are used to connect described band and described density sensing cell; And
Motor, this motor are used to make described top sheave to rotate required degree.
18. equipment according to claim 3, wherein said density sensing cell obtains mud density on the top from described purification tank for liquid waste in the progressively mobile process to set a distance in bottom.
19. according to any one the described equipment in the claim 1 to 3, wherein said container is made by opaque material, enters to stop any light.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2006-0112280 | 2006-11-14 | ||
| KR1020060112280 | 2006-11-14 | ||
| KR1020060112280A KR100714402B1 (en) | 2006-11-14 | 2006-11-14 | Apparatus for sensing precipitation density of sludge in waste water treatment tank |
| KR1020070002160A KR100747085B1 (en) | 2007-01-08 | 2007-01-08 | Apparatus for sensing precipitation density of sludge in waste water treatment tank and method for sensing precipitation density of sludge |
| KR10-2007-0002160 | 2007-01-08 | ||
| KR1020070002160 | 2007-01-08 | ||
| PCT/KR2007/005696 WO2008060087A1 (en) | 2006-11-14 | 2007-11-13 | Apparatus for sensing precipitation density of sludge in waste water treatment tank and method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101632017A CN101632017A (en) | 2010-01-20 |
| CN101632017B true CN101632017B (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200780046583XA Expired - Fee Related CN101632017B (en) | 2006-11-14 | 2007-11-13 | Apparatus for sensing precipitation density of sludge in waste water treatment tank and method therefor |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100714402B1 (en) |
| CN (1) | CN101632017B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100912422B1 (en) * | 2009-01-16 | 2009-08-14 | 정종덕 | Apparatus and method for measuring suspended solids in pipe |
| CN105498314B (en) * | 2015-12-07 | 2017-08-25 | 宋德安 | A kind of control system for setting pot desanding |
| CN105717072A (en) * | 2016-04-14 | 2016-06-29 | 天津视讯云光电科技有限公司 | Transmission type COD (chemical oxygen demand) detection device based on reflecting mirror |
| CN107416918A (en) * | 2017-06-09 | 2017-12-01 | 隆润新技术发展有限公司 | The method of separated sludge and small-sized desliming system from sanitary sewage |
| CN108562707B (en) * | 2018-03-28 | 2023-10-13 | 浙江大学昆山创新中心 | Water quality monitoring probe protection structure of self-adaptation water level degree of depth |
| KR102159098B1 (en) * | 2018-07-03 | 2020-09-23 | 주식회사 렉소엔지니어링 | Sludge automatic drawing system and operation method thereof |
| CN109443987B (en) * | 2018-11-29 | 2021-03-26 | 浙江工贸职业技术学院 | Waste water monitoring method with hydrometer and device thereof |
| CN110231314A (en) * | 2019-06-28 | 2019-09-13 | 葛洲坝水务(滨州)有限公司 | Activated sludge on-line monitoring device |
| CN112569646A (en) * | 2020-11-18 | 2021-03-30 | 安徽德邦化工有限公司 | Intelligence ammonia water clarifying tank |
| KR102327097B1 (en) * | 2021-04-16 | 2021-11-17 | 웨스글로벌 주식회사 | Method for measuring sludge height of sequencing batch reactor process |
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| US4201477A (en) * | 1978-01-16 | 1980-05-06 | Fmc Corporation | Suspended solids meter |
| CN1369442A (en) * | 2001-12-28 | 2002-09-18 | 赵金标 | Process for treating acidic sewage with high-density mud |
| CN1760659A (en) * | 2004-10-11 | 2006-04-19 | 天津泰达新水源科技开发有限公司 | Full automatic method for measuring density index of SDI sludge, and tester |
| CN2782672Y (en) * | 2005-04-13 | 2006-05-24 | 邢英伟 | Mud dewatering machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100327125B1 (en) | 1999-09-14 | 2002-03-13 | 조기환 | Automatic measuring apparatus of mixed liquid suspended solid |
| KR100414446B1 (en) | 2001-10-12 | 2004-01-13 | 십자성마을회 주식회사 | SS Measuring Apparatus |
-
2006
- 2006-11-14 KR KR1020060112280A patent/KR100714402B1/en active IP Right Grant
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- 2007-11-13 CN CN200780046583XA patent/CN101632017B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4201477A (en) * | 1978-01-16 | 1980-05-06 | Fmc Corporation | Suspended solids meter |
| CN1369442A (en) * | 2001-12-28 | 2002-09-18 | 赵金标 | Process for treating acidic sewage with high-density mud |
| CN1760659A (en) * | 2004-10-11 | 2006-04-19 | 天津泰达新水源科技开发有限公司 | Full automatic method for measuring density index of SDI sludge, and tester |
| CN2782672Y (en) * | 2005-04-13 | 2006-05-24 | 邢英伟 | Mud dewatering machine |
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| CN101632017A (en) | 2010-01-20 |
| KR100714402B1 (en) | 2007-05-15 |
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