CN210639193U - Device for measuring non-silting critical flow velocity - Google Patents
Device for measuring non-silting critical flow velocity Download PDFInfo
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- CN210639193U CN210639193U CN201921872977.7U CN201921872977U CN210639193U CN 210639193 U CN210639193 U CN 210639193U CN 201921872977 U CN201921872977 U CN 201921872977U CN 210639193 U CN210639193 U CN 210639193U
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Abstract
The utility model discloses a device of critical velocity of flow survey of not silting up, comprising a water tank, be equipped with the overflow weir in the water tank, the overflow weir is used for cutting apart the water tank and is allotment case and the case that tests the speed, be equipped with at least one baffle in the case of testing the speed, be equipped with the mixer in the allotment case, the allotment case still is connected with filler pipe and filler pipe, be equipped with the second valve on the filler pipe, be equipped with the third valve on the filler pipe, the allotment case passes through the pipeline intercommunication with the case that tests the speed, be equipped with water pump, flowmeter, adjusting valve and first valve on the pipeline in proper order, be located be equipped with the scale on the water tank of allotment. The utility model can measure the non-silting critical flow rate of the water-solid mixed liquid composed of different particle settling speeds; the device has the advantages of simple manufacture, low cost, economy, practicality, convenient operation, high measurement precision and the like.
Description
Technical Field
The utility model relates to a feedwater and sewage treatment field, more specifically say, in particular to one kind to the device that contains the critical velocity of flow survey of not silting up of the water-solid mixture liquid of floc or mud granule or fine sand or suspended solid.
Background
In the field of water supply and sewage treatment, particles/flocs with different settling rates flow in structures, pipelines and channels, and sometimes the particles are expected to settle to the bottom of a tank for removal, and sometimes the particles are expected to be suspended and not settled, for example, a settling tank is used for settling and removing the particles; the pipeline, the channel and the biochemical tank avoid the sedimentation of particle flocs, so the determination of the non-sedimentation critical flow rate of the water-solid mixed liquid with different particle sedimentation speeds becomes a key, the flow rate of the water flow is greater than the non-sedimentation critical flow rate, the solid is not sedimented, the flow rate of the water flow is less than the critical flow rate, and the solid is sedimented.
At present, a plurality of devices for measuring the settling velocity of particles/flocs exist in the market, and although the settling velocity of the particles is obtained, the particles can not be settled just without knowing how many times the flow velocity of water reaches the settling velocity of the particles, so that the design of a water treatment structure and the production in the water treatment operation process cannot be indicated.
Coagulant is added into a built structure, such as a high-efficiency sedimentation tank, so that floc is quickly settled, the adding amount of the coagulant depends on the size of the non-sedimentation critical flow rate of water-solid mixed liquid, and the non-sedimentation critical flow rate of the dosing floc is not determined in the current market, so that the problems of sedimentation first and then floating sludge occur in a non-sedimentation area of most high-efficiency sedimentation tanks.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device of the critical velocity of flow survey of siltation is not deposited to simple structure, with low costs, easy operation, accuracy are reliable.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a device of critical velocity of flow survey of not silting up, includes the water tank, be equipped with the overflow weir in the water tank, the overflow weir is used for cutting apart into the water tank allotment case and the case that tests the speed, be equipped with at least one baffle in the case that tests the speed, be equipped with the mixer in the allotment case, the allotment case still is connected with filler pipe and dosing pipe, be equipped with the second valve on the filler pipe, be equipped with the third valve on the dosing pipe, the allotment case passes through the pipeline intercommunication with the case that tests the speed, be equipped with water pump, flowmeter, adjusting valve and first valve on the pipeline in proper order, be located be equipped with the scale on the water.
Furthermore, the material of water tank is transparent material, the length, width and the height of water tank do not all exceed one meter.
Furthermore, the distance between the upper end of the overflow weir and the top of the water tank is two meters at zero point.
Further, the overflow weir is a thin-wall weir or a triangular weir.
Furthermore, the quantity of baffle is three, and the baffle is used for cutting apart the speed measuring box into a plurality of spaces, and every space corresponds a first valve.
Compared with the prior art, the utility model has the advantages of: the utility model makes up the blank of the measurement of the critical flow velocity of the water-solid mixed liquid in the water supply treatment and sewage treatment industries; the non-deposition critical flow rate of the water-solid mixed liquid composed of different particle settling speeds can be measured; the device has the advantages of simple manufacture, low cost, economy, practicality, convenient operation, high measurement precision and the like, and can provide scientific basis for engineering design and production management.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the top view of the device for measuring the non-deposition critical flow rate of the present invention.
Fig. 2 is a left side view schematically showing the structure of the device for measuring the critical flow rate without sedimentation.
Fig. 3 is a summary diagram of the critical flow rate of various water-solid mixed liquids during application of the present invention.
In the figure: the device comprises a water tank 1, an overflow weir 2, a partition plate 3, a first valve 4, a water pump 5, a flow meter 6, a regulating valve 7, a stirrer 8, a second valve 9, a third valve 10, a pipeline 11, a water adding pipe 12 and a chemical adding pipe 13.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.
Referring to fig. 1 and 2, the utility model provides a device of critical flow velocity measurement of not silting up, including water tank 1, be equipped with overflow weir 2 in the water tank 1, overflow weir 2 is used for cutting apart into allotment case A and tacho case B with water tank 1, be equipped with at least one baffle 3 in the tacho case B, be equipped with mixer 8 in the allotment case A, allotment case A still is connected with filler pipe 12 and filler pipe 13, be equipped with second valve 9 on the filler pipe 12, be equipped with third valve 10 on the filler pipe 13, allotment case A and tacho case B pass through pipeline 11 intercommunication, be equipped with water pump 5, flowmeter 6, adjusting valve 7 and first valve 4 on the pipeline 11 in proper order, be located be equipped with scale 10 on the water tank 1 of allotment case A tank wall.
In this embodiment, the water tank 1 is made of a transparent material, and the length and the width of the water tank 1 do not exceed 1 meter.
In this embodiment, the distance between the upper end of the overflow weir 2 and the top of the water tank 1 is 0.2 m.
In this embodiment, the overflow weir 2 is a thin-wall weir or a triangular weir.
In this embodiment, the number of the partition boards 3 is three, and the partition boards 3 are detachably mounted, and are used for dividing the speed measuring box B into a plurality of spaces, and each space corresponds to one first valve 4.
In this embodiment, the water pump 5 is controlled by stepless variable frequency speed regulation, and the flow rate of the water pump can be adjusted.
In this embodiment, the regulating valve 7 has a valve position scale indication.
In this embodiment, the agitator 8 is controlled by stepless variable frequency speed regulation.
In this embodiment, the valves 9 and 10 can control the dosage by opening and closing.
The non-silting critical flow rate measuring device provided by the utility model is described and tested by taking a high-efficiency sedimentation tank of a certain domestic sewage plant as an example.
A thick floating sludge layer is formed on the surface of a water passing area between a flocculation stirring area and a settling area in a high-efficiency settling pond of a certain domestic sewage plant, the generated floating sludge layer is caused by improper proportioning of the flocculating agent amount and the return sludge amount, so that the flocculated alum flocs are settled at the bottom of a non-settling area at a high speed, and generated gas is lifted to the water surface after anaerobic treatment. Adopt the utility model discloses to the return sludge volume of difference, throw with different flocculating agent volume, the critical velocity of flow of not silting up of corresponding water sample of survey.
And (3) detaching the two partition plates, opening a valve 4 corresponding to each grid of the speed measuring box, wherein the area of the flow cross section of the speed measuring box is 0.12m 2. And opening the valve 9, inputting 150L of a sample water sample to be detected into the allocation box, taking the sample water sample from the high-efficiency sedimentation tank, and closing the valve 9 after the water level reaches the specified scale. And (3) opening the stirrer 8, then opening the valve 10, inputting polyferric sulfate with the mass concentration of 11% into the blending box to prepare flocculated alum flocs until the required scale is reached, controlling the solid adding amount of the polyferric sulfate to be 1mg/L, and then closing the valve 10. And (3) starting the water pump 5 and the valve 7 to ensure that the running frequency of the water pump is not higher than 10Hz, the opening degree of the valve 7 is the maximum, and the mixed liquid in the blending box enters the speed measuring box through a pipeline 11. The liquid level of the mixed liquid in the speed measuring box is higher than that of the overflow weir 2 and then enters the blending box, and then flows circularly through the water pump 5 and the pipeline 11.
Gradually increasing the operating frequency of the water pump, increasing the flow entering the blending tank and increasingThe velocity of flow is measured to the case. And (5) observing the solid precipitation condition at the bottom of the tachometer box, and fixing the running frequency of the water pump when no solid exists at the bottom. Gradually closing the regulating valve 7, observing the solid precipitation condition at the bottom of the tachometer box, stopping the valve operation when the solid just appears at the bottom of the tachometer box, and recording the reading of the flowmeter 6 at the moment as 0.62m3/h。
And (3) data calculation: q ═ a × V1; in the formula, Q: liquid flow rate of 0.62m3H; v: the liquid flow rate; a: the flow cross-sectional area of the speed measuring box is 0.12m2(ii) a Substituting the Q and A values into the formula 1, and calculating the flow velocity V to be 5.17m/h, wherein the V value is the corresponding critical flow velocity of the water-solid mixed liquid without silting.
Example sample water with different sludge reflux ratios is added with different amounts of polymeric ferric sulfate to obtain the corresponding water-solid mixed liquid non-silting critical flow rate, see figure 3.
The utility model makes up the blank of the measurement of the critical flow velocity of the water-solid mixed liquid in the water supply treatment and sewage treatment industries; the non-deposition critical flow rate of the water-solid mixed liquid composed of different particle settling speeds can be measured; the device has the advantages of simple manufacture, low cost, economy, practicality, convenient operation, high measurement precision and the like, and can provide scientific basis for engineering design and production management.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, and the protection scope of the present invention should not be exceeded by the claims.
Claims (5)
1. An apparatus for determining a critical flow rate without fouling, comprising: the water tank comprises a water tank, be equipped with the overflow weir in the water tank, the overflow weir is used for cutting apart into the water tank allotment case and the case that tests the speed, the incasement that tests the speed is equipped with at least one baffle, be equipped with the mixer in the allotment case, the allotment case still is connected with filler pipe and filler pipe, be equipped with the second valve on the filler pipe, be equipped with the third valve on the filler pipe, the allotment case passes through the pipeline intercommunication with the case that tests the speed, be equipped with water pump, flowmeter, adjusting valve and first valve on the pipeline in proper order, be located be equipped with the scale on the water tank of allotment.
2. The apparatus for non-fouling critical flow rate measurement according to claim 1, wherein: the material of water tank is transparent material, the length, width and the height of water tank do not all exceed one meter.
3. The apparatus for non-fouling critical flow rate measurement according to claim 1, wherein: and the distance between the upper end of the overflow weir and the top of the water tank is two meters at zero.
4. The apparatus for non-fouling critical flow rate measurement according to claim 1, wherein: the overflow weir is a thin-wall weir or a triangular weir.
5. The apparatus for non-fouling critical flow rate measurement according to claim 1, wherein: the quantity of baffle is three, and the baffle is used for cutting apart into a plurality of spaces with the case that tests the speed, and every space corresponds a first valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921872977.7U CN210639193U (en) | 2019-11-03 | 2019-11-03 | Device for measuring non-silting critical flow velocity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921872977.7U CN210639193U (en) | 2019-11-03 | 2019-11-03 | Device for measuring non-silting critical flow velocity |
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| Publication Number | Publication Date |
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| CN210639193U true CN210639193U (en) | 2020-05-29 |
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| CN201921872977.7U Active CN210639193U (en) | 2019-11-03 | 2019-11-03 | Device for measuring non-silting critical flow velocity |
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