CN214503273U - Flow passage separation net detection device - Google Patents
Flow passage separation net detection device Download PDFInfo
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- CN214503273U CN214503273U CN202023038461.8U CN202023038461U CN214503273U CN 214503273 U CN214503273 U CN 214503273U CN 202023038461 U CN202023038461 U CN 202023038461U CN 214503273 U CN214503273 U CN 214503273U
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Abstract
The utility model discloses a runner separates net detection device, including a pallet, a storage bucket, a charge pump and a plurality of separate net pond subassemblies. The utility model can directly and rapidly detect the indexes of multiple dimensions such as diffusivity, pollutant carrying capacity, resistance and the like of the runner partition net; the utility model has simple structure and low manufacturing cost, does not need various instruments, and only needs a feed barrel, a feed pump, a separation net tank, a matched pipeline and a valve; the utility model has low operating pressure and low requirement on the pressure-resistant grade of the material, can use transparent organic materials such as a ya-ge plate, glass and the like, and does not need to use stainless steel with high pressure-resistant grade; the utility model discloses also low to sealed fixed requirement, only need adopt simple centre gripping fixed establishment just can reach sealed effect, it is very simple and convenient to operate.
Description
Technical Field
The utility model particularly relates to a runner separates net detection device.
Background
In the roll-type membrane element, the concentrated water separation net not only plays a role in supporting a flow channel and guiding liquid, but also can be used as a turbulence promoter in the assembly, so that concentration polarization and pollution phenomena on the membrane surface are reduced while turbulence is effectively enhanced. However, the barrier net increases the flow resistance of the fluid and increases the pressure loss while improving the mass transfer efficiency, thereby increasing the energy consumption and also bringing about local channeling, dead zones and the like. In order to further adapt the membrane module to diversified application fields and prolong the service life of the membrane module, the optimization design of the separation net is particularly important.
The existing evaluation method for the separation net mainly focuses on geometric parameters such as the thickness of the separation net, the space between the separation nets, the water inlet angle, the shape of the separation net and the like, but the evaluation on the anti-pollution performance is little, and the CFD technology is adopted to simulate the fluid distribution state of feed liquid in a membrane element so as to evaluate the anti-pollution effect of the separation net on an assembly; or the separation net is rolled into the membrane page, and the anti-pollution performance of the separation net is indirectly evaluated through the properties of the membrane element such as interception rate, flux, pressure drop and the like.
The visualization of the fluid flow state inside a flat-plate membrane module (Wang et al, chemical industry report, 65 vol.1 st, pages 71-77, 1 month 2014) discloses an organic glass membrane module which is made of transparent organic glass and is used for directly observing and testing the fluid mechanical properties of different separation nets. V-shaped grooves are reserved at the inlet and the outlet of the membrane component, so that fluid is uniformly distributed on the surface of the membrane component, and the influence of the inlet and the outlet is eliminated. The separation net is arranged in the middle rectangular area, fluid is conveyed into the device from the water inlet through the peristaltic pump and then is collected to the water outlet and flows out of the device from the water outlet, pressure gauges are arranged on a water inlet pipeline and a water outlet pipeline of the device and are used for detecting the pressure of inlet and outlet water and calculating the pressure loss of the fluid after passing through the separation net. However, in the actual use process, the technical scheme has a plurality of defects: 1) short flow phenomenon, the distribution of water flow is very uneven, the water flow mainly flows at the central line position of the water inlet and the water outlet, the water amount on two sides is small, and the water flow is slow; 2) the requirement on levelness is very strict, the whole flow channel is flat, the device is slightly inclined in the direction vertical to the water flow, and the water flow can be seriously distributed unevenly under the condition of low flow rate, namely the low-level water flow is concentrated, the flow rate is high, the high-level water flow is slow, and the diffusion is poor; 3) the device has single detection parameter, and can only detect the fluid pressure before and after, and calculate the pressure loss delta P in the flow passage. But because the area of the detected separation net is very small relative to the membrane element, the pressure loss is very small and can not be detected; 4) the detection method determines the lowest diffusion flow rate of the tracer by photographing and visual observation, but according to the actual detection result, the influence of the structure of the separation net is far greater than that of the flow rate, namely the diamond separation net can generate diffusion phenomenon at very low flow rate, but the diffusion effect of the parallel separation net is still relatively poor at high flow rate.
CN204563945U discloses a type selection device of feeding runner net, including storage tank, defeated material pump, runner net's fixer, feeding manometer and ejection of compact manometer. The device calculates pressure loss by detecting the pressure of feeding and discharging, and the pressure difference is between 0.045-0.055 MPa, then the partition net model selection is adapted, if the pressure difference is less than 0.045MPa, the partition net model selection is larger, the partition net with a narrower runner needs to be selected, if the pressure difference is greater than 0.055MPa, the partition net model selection is smaller, the partition net with a wider runner needs to be selected, and the pressure difference between the feeding and discharging of the selected partition net is within the range. The defect of the model selection device is that: 1) the detected parameters are single, and only the pressure in front of and behind the device can be detected, and the pressure loss delta P in the flow channel can be calculated. But because the area of the detected separation net is very small relative to the membrane element, the pressure loss is very small and can not be detected; 2) the function is single, the membrane element can only be used for screening the thickness of the separation net, other performance parameters (such as diffusivity, pollutant carrying performance and the like) of the separation net cannot be detected on one device, the finished membrane element needs to be prepared, and the performance of the separation net is evaluated according to the detection result of the membrane element.
CN106731864B discloses a device for dense net antipollution detects, including lower bolster, location slider A, location slider B and cope match-plate pattern, the up end of lower bolster is equipped with the arc boss, and the lower terminal surface of lower bolster is equipped with the product water export A who runs through the arc boss, the lower terminal surface of cope match-plate pattern is equipped with the arc recess, and the up end is equipped with the product water export B of intercommunication arc recess, and the both ends of cope match-plate pattern are equipped with raw water import and the dense water export with the arc recess intercommunication respectively, location slider A and location slider B symmetry respectively set up in the arc boss and the arc recess both sides of lower bolster, cope match-plate pattern to constitute the die cavity together with lower bolster, cope match-plate pattern, be provided with dense net and two diaphragms that are located dense net both sides face in the die cavity respectively. The utility model discloses to the observation that dense net received the pollution degree, can know the antipollution of dense net. If the lower template and the upper template are made of transparent organic glass, the whole process of pollution resistance of the dense net can be known more clearly and accurately. However, the technical scheme has the following defects: 1) the operation process of a real roll-type membrane element is simulated, but water can be produced only by feed liquid penetrating through a membrane layer, so that the requirement on the pressure-resistant grade of the device is high, the operating pressure of a microfiltration-grade membrane is at least more than 3bar, if the membrane is a reverse osmosis membrane, the operating pressure is at least more than 15bar, the requirements on the fixation and sealing between an upper template and a lower template are very high, if the template is made of transparent organic glass, the pressure-resistant grade is insufficient, the membrane is easy to crack, the pollution process of the membrane can not be observed by stainless steel, the operability is poor, and the implementation is difficult; 2) the pollution process is slow, the test period is long, the operation process of a real membrane element is reduced to the maximum extent by the device, so that the concentration configuration of the simulated feed liquid is close to the operation condition of the membrane element, a high suspended particle system cannot be configured, otherwise, the experiment cannot be continued due to pollution blockage of a flow channel, the membrane pollution needs a long time, and the operation is required for at least more than 1 day in one period.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art defect, provide a runner separates net detection device.
The technical scheme of the utility model as follows:
a flow channel screen detection device comprises a stand, a charging bucket, a feeding pump and a plurality of screen pool components;
each net separating pool component comprises a body, a sealing ring, an upper cover and a plurality of clamping mechanisms, wherein the upper cover is arranged on the body through the sealing ring cover, the clamping mechanisms clamp the body and the upper cover, and the body and the upper cover are transparent, wherein
The groove body is concavely provided with a groove body, the groove body is sequentially divided into a feeding area, a separation net placing area and a discharging area from one end to the other end along the length direction of the groove body, the feeding area is semicircular, the discharging area is isosceles triangle-shaped, the depth of the feeding area is greater than that of the separation net placing area, the depth of the discharging area is consistent with that of the separation net placing area, the bottom wall of one end of the groove body is provided with a feeding hole, the bottom wall of the feeding area at the downstream of the feeding hole is convexly provided with a flow guide baffle, and the bottom wall of the other end of the groove body is provided with a discharging hole;
the upper cover is provided with a tracer inlet, the tracer inlet corresponds to the feeding area of the body, a silica gel capillary is inserted in the feeding area, one end of the silica gel capillary is communicated with an injection device for injecting tracer, and the other end of the silica gel capillary is inserted below the upper cover and is opposite to the edge of the separation net placing area of the body, which is connected with the feeding area;
the plurality of screen pool components are arranged on the stand and are arranged in parallel, the charging bucket is communicated with the feeding holes of the plurality of screen pool components through a feeding pump, the discharging holes of the plurality of screen pool components are communicated with the charging bucket, and the charging bucket is internally provided with a detection feed liquid.
In a preferred embodiment of the present invention, the body is provided with at least two positioning grooves, and the upper cover is provided with at least two positioning protrusions adapted to the two positioning grooves.
In a preferred embodiment of the present invention, the plurality of clamping mechanisms are G-shaped clamps.
In a preferred embodiment of the present invention, the junction between the feeding area and the partition net placing area is provided with a transition slope.
In a preferred embodiment of the invention, the depth of the feeding zone is 5-15mm and the depth of the spacer mesh placing zone is 2-5 mm.
Further preferably, the depth of the feeding area is 10mm, and the depth of the mesh placing area is 6.5 mm.
In a preferred embodiment of the present invention, at least one spacer is further disposed in the partition placing area to adapt to the partition with different thicknesses.
Further preferably, the at least one spacer has a thickness of 0.2 to 3 mm.
The utility model has the advantages that:
1. the utility model discloses can be direct, the index of a plurality of dimensions such as diffusivity, pollutant carrying nature and resistance that the short-term test flat membrane separates the net.
2. The utility model has the advantages of simple structure, the cost of manufacture is low, need not various instruments, only need feedwell, charge pump, spacer mesh pond and supporting pipeline, valve can.
3. The utility model discloses an operating pressure is low, requires lowly to the withstand voltage grade of material, can use transparent organic materials such as inferior check board, glass, need not use the stainless steel of high withstand voltage grade.
4. The utility model discloses also low to sealed fixed requirement, only need adopt simple centre gripping fixed establishment just can reach sealed effect, it is very simple and convenient to operate.
Drawings
Fig. 1 is a schematic structural diagram of a flow channel partition net detection device according to embodiment 1 of the present invention.
Fig. 2 is a schematic perspective view of a flow channel partition net detection device according to embodiment 1 of the present invention.
Fig. 3 is a schematic perspective view of a partition net tank assembly in embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram of a body of a partition screen pool assembly in embodiment 1 of the present invention.
Fig. 5 is a schematic structural view of the upper cover in embodiment 1 of the present invention.
Detailed Description
The technical solution of the present invention will be further illustrated and described below with reference to the accompanying drawings by means of specific embodiments.
Example 1
As shown in fig. 1 and 2, a flow channel partition net detection device includes a stand 2, a material barrel 3, a feeding pump 4 and two partition net pool assemblies 1.
As shown in fig. 3 and 4, each partition net tank assembly 1 comprises a body 10, a sealing ring 11, an upper cover 13 and four G-shaped clamps 14, wherein the upper cover 13 is covered on the body 10 through the sealing ring 11, the four G-shaped clamps 14 clamp the body 10 and the upper cover 13, and the body 10 and the upper cover 13 are transparent.
As shown in fig. 4, a tank body 101 is concavely arranged on the body 10, the tank body 101 is sequentially divided into a feeding area 1011, a mesh placing area 1012 and a discharging area 1013 from one end to the other end along the length direction, the feeding area 1011 is in a semicircular shape, the discharging area 1013 is in an isosceles triangle shape, the mesh placing area 1012 is in a rectangular shape, the depth of the feeding area 1011 is 10mm, the depth of the mesh placing area 1012 is 3.5mm (the flat sheet film mesh with the highest thickness of 120mi1 can be tested, if the flat sheet film mesh with larger thickness can be enlarged according to the requirement, when the flat sheet film mesh with different thicknesses is tested, the proper height can be adjusted by increasing or reducing the number of gaskets (the thickness of 2-3mm thick gasket and the thickness of 0.2-1mm thin gasket) in the mesh placing area 1012 and selecting the corresponding type according to the requirement), the fall of the feeding area 1011 and the mesh placing area 1012 is 6.5mm, the depth of the discharge area 1013 is the same as that of the partition net placement area 1012, the bottom wall of one end of the tank body 101 is provided with a feed inlet 102, the bottom wall of the feed area 1011 at the downstream of the feed inlet 102 is convexly provided with a flow guide baffle 1014, the bottom wall of the other end of the tank body 101 is provided with a discharge outlet 103, and the junction of the feed area 1011 and the partition net placement area 1012 is provided with a transition slope 1015. If there is suspended particles in the detection feed liquid, the suspended particles will collide with the wall and fall down when entering the partition net placing area 1012, which causes the phenomenon of the suspended particles enrichment in the feeding area 1011, and this influence can be eliminated after the transition slope 1015 is set.
The function of the feeding area 1011 is to adjust the uniformity of the concentration and flow rate of the test feed, so that the larger the feeding area 1011 is, the more advantageous the uniformity of the concentration and flow rate is, but the shape of the feeding area 1011 is set to be semicircular to avoid dead flow zones. The diversion baffle 1014 has the function of avoiding the phenomenon that the detection feed liquid forms short flow at the connecting line of the feed inlet 102 and the discharge outlet 103, so that the material is discharged from the middle area of the separation net to be detected, and the material is not discharged from the two sides.
As shown in fig. 5, the upper cover 13 has a tracer inlet 130, the tracer inlet 130 corresponds to the feeding area 1011 of the body 10 and is inserted with a silica gel capillary 132, one end of the silica gel capillary 132 is communicated with the injection device 5 for injecting tracer, and the other end is inserted under the upper cover 13 and faces the edge of the partition net placing area 1012 of the body 10, which is connected with the feeding area 1011;
two positioning grooves 104 are arranged at two ends of a diagonal line of the body 10, and the upper cover 13 is provided with two positioning protrusions 131 adapted to the two positioning grooves 104.
As shown in fig. 1 and 2, two separate net pond assemblies 1 are arranged on a stand 2 and are arranged in parallel, a charging bucket 3 is communicated with a feeding hole 102 of the two separate net pond assemblies 1 through a feeding pump 4, a discharging hole 103 of the two separate net pond assemblies 1 is communicated with the charging bucket 3, and a detection feed liquid is arranged in the charging bucket 3.
A. The runner separates dirty performance of receiving that the net detection device detected and separates the net with above-mentioned runner, specifically as follows:
(1) cutting a screen sample, wherein the size of the screen sample is matched with the size of the screen placement area 1012, placing the screen sample in the screen placement area 1012, placing a sealing ring 11, covering an upper cover 13, sealing and fixing the screen sample by using a G-shaped clamp 14, and connecting pipelines among a feeding barrel 3, a feeding pump 4 and two screen pool assemblies 1 to form a closed circulating system;
(2) preparing a detection feed liquid: at 25nm TiO2Preparing a detection feed liquid with the concentration of 50ppm, wherein the volume of the detection feed liquid is 1L, and the turbidity T is measured0；
(3) Starting the feed pump 4, adjusting the flow rate to 1.0LPM, running for 30min, closing the feed pump 4, and measuring the turbidity T of the suspension in the feed barrel 3i；
(4) Calculating the retention rate R ═ T0-Ti)/T0。
The interception condition of part of the separation net to the suspended particulate matters is tested by the steps, and the pollutant carrying performance evaluation result of the separation net is obtained: the interception of the separation net of the large wave plate to pollutants is minimum, and the interception rate of the rhombic separation net to suspended particles is higher than that of the inclined and square separation nets under the condition of the same thickness.
B. The flow channel separation net detection device is used for detecting the diffusion performance of the separation net and specifically comprises the following steps:
(1) cutting a separation net sample and a diaphragm sample, wherein the size of the separation net sample is consistent with that of the separation net placing area 1012, placing the diaphragm in the separation net placing area 1012 with the diaphragm surface facing upwards, then placing the separation net to be detected above the diaphragm, placing a sealing ring 11, covering an upper cover 13, sealing and fixing by using a G-shaped clamp 14, and connecting pipelines among a feeding barrel 3, a feeding pump 4 and two separation net tank assemblies 1 to form a closed circulating system;
(2) pure water is used as detection feed liquid, a feed pump 4 is started, the flow rate is adjusted, and the system is enabled to operate stably;
(3) preparing a video camera, adjusting a focal distance and a visual angle, and starting video recording;
(4) injecting the red ink tracer into the silica gel capillary 132 by using an injection device, and observing the diffusion condition;
(5) and (4) playing back the video, cutting out the picture diffused to the most distance, calculating the number N of crossed grids, and measuring the diffusion width D.
The detection result shows that the diffusivity of the square spacer screen is relatively poor, the number of crossing grids is small under the same Reynolds number, and the diffusion width is small; the diamond-shaped screen has good diffusivity, and the diffusion effect is very good and relatively close no matter under high and low Reynolds numbers. The nature of the diffusion is related to the configuration of the spacer mesh: the square separation net longitudinal chaste tree twigs are thick and thin, the flow direction of fluid can concentrate the transverse chaste tree twigs to cross relatively, and the transition of the longitudinal chaste tree twigs is difficult to occur; the diamond-shaped separation net is provided with transverse and longitudinal wattles with the same thickness and the water inlet angle of 90 degrees, thick and thin channels of nodes of the transverse and longitudinal wattles are provided, the water flow diffusion in all directions is relatively uniform, but the relative resistance is also larger.
C. The energy-saving performance of the separation net is detected by using the flow channel separation net detection device, which comprises the following specific steps:
(1) cutting different screen samples and membrane samples, wherein the size of the screen samples is consistent with the size of the screen placement area 1012, placing the membrane in the screen placement area 1012 with the membrane surface facing upwards, then placing the screen to be measured above the membrane, placing a sealing ring 11, covering an upper cover 13, sealing and fixing by using a G-shaped clamp 14, and connecting pipelines among a feeding barrel 3, a feeding pump 4 and the two screen pool assemblies 1 to form a closed circulating system;
(2) pure water is used as detection feed liquid, a feed pump 4 is started, the maximum flow speed is adjusted, and the system is allowed to stably operate;
(3) the water yield Q of 1min of each screen pool component 1 is measured and calculated by a measuring cylinder and a stopwatchi(ii) a When the resistance of the separation net is close to that of the test, the water production time can be properly prolonged, and the difference is more obvious.
(4) And comparing the water yield to determine the resistance of the partition net, and finally judging the energy saving performance of the partition net.
The detection result shows that the difference of the resistance of the separation net with the same thickness and different structures is larger, when the overflowing pressure is equal, the overflowing quantity of one side with small resistance is large, and the overflowing quantity of one side with large resistance is small, through the simple device and the quick qualitative test method, the resistance of the separation net on one side can be qualitatively judged to be small under the condition that the water yield of the separation net on one side is large, the prepared assembly has small resistance to the fluid and small pressure drop, so that the energy is saved more.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (8)
1. Runner separates net detection device, its characterized in that: comprises a stand, a charging bucket, a feeding pump and a plurality of screen pool components; each screen cell component comprises a body, a sealing ring, an upper cover and a plurality of clamping mechanisms, the upper cover is arranged on the body through the sealing ring cover, the plurality of clamping mechanisms clamp the body and the upper cover, the body and the upper cover are transparent, wherein,
the groove body is concavely provided with a groove body, the groove body is sequentially divided into a feeding area, a separation net placing area and a discharging area from one end to the other end along the length direction of the groove body, the feeding area is semicircular, the discharging area is isosceles triangle-shaped, the depth of the feeding area is greater than that of the separation net placing area, the depth of the discharging area is consistent with that of the separation net placing area, the bottom wall of one end of the groove body is provided with a feeding hole, the bottom wall of the feeding area at the downstream of the feeding hole is convexly provided with a flow guide baffle, and the bottom wall of the other end of the groove body is provided with a discharging hole;
the upper cover is provided with a tracer inlet, the tracer inlet corresponds to the feeding area of the body, a silica gel capillary is inserted in the feeding area, one end of the silica gel capillary is communicated with an injection device for injecting tracer, and the other end of the silica gel capillary is inserted below the upper cover and is opposite to the edge of the separation net placing area of the body, which is connected with the feeding area;
the plurality of screen pool components are arranged on the stand and are arranged in parallel, the charging bucket is communicated with the feeding holes of the plurality of screen pool components through a feeding pump, the discharging holes of the plurality of screen pool components are communicated with the charging bucket, and the charging bucket is internally provided with a detection feed liquid.
2. A flow channel spacer screen inspection device as claimed in claim 1, wherein: the body is provided with at least two positioning grooves, and the upper cover is provided with at least two positioning bulges matched with the two positioning grooves.
3. A flow channel spacer screen inspection device as claimed in claim 1, wherein: the clamping mechanisms are G-shaped clamps.
4. A flow channel spacer screen inspection device as claimed in claim 1, wherein: and a transition slope is arranged at the junction of the feeding area and the partition net placing area.
5. A flow channel spacer screen inspection device as claimed in claim 1, wherein: the depth of the feeding area is 5-15mm, and the depth of the mesh separation placing area is 2-5 mm.
6. The flow channel spacer screen inspection device of claim 5, wherein: the depth of the feeding area is 10mm, and the depth of the mesh separation placing area is 6.5 mm.
7. A flow channel spacer screen inspection device as claimed in claim 1, wherein: at least one gasket is arranged in the separation net placing area to adapt to separation nets with different thicknesses.
8. A flow channel spacer screen inspection device as claimed in claim 7, wherein: the thickness of the at least one gasket is 0.2-3 mm.
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| CN202023038461.8U CN214503273U (en) | 2020-12-16 | 2020-12-16 | Flow passage separation net detection device |
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| CN202023038461.8U CN214503273U (en) | 2020-12-16 | 2020-12-16 | Flow passage separation net detection device |
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| CN214503273U true CN214503273U (en) | 2021-10-26 |
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| CN202023038461.8U Active CN214503273U (en) | 2020-12-16 | 2020-12-16 | Flow passage separation net detection device |
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