CN116718508A - Method and device for testing dust holding capacity of filter paper - Google Patents
Method and device for testing dust holding capacity of filter paper Download PDFInfo
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- CN116718508A CN116718508A CN202310696304.5A CN202310696304A CN116718508A CN 116718508 A CN116718508 A CN 116718508A CN 202310696304 A CN202310696304 A CN 202310696304A CN 116718508 A CN116718508 A CN 116718508A
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- 238000012360 testing method Methods 0.000 title claims abstract description 106
- 239000000428 dust Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 108
- 231100000719 pollutant Toxicity 0.000 claims abstract description 108
- 239000007788 liquid Substances 0.000 claims abstract description 101
- 239000002245 particle Substances 0.000 claims abstract description 49
- 239000011259 mixed solution Substances 0.000 claims abstract description 44
- 239000000356 contaminant Substances 0.000 claims abstract description 29
- 238000001914 filtration Methods 0.000 claims abstract description 29
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 19
- 238000010998 test method Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 17
- 238000005303 weighing Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 4
- -1 gravel Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 3
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 3
- 239000008158 vegetable oil Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 10
- 238000002474 experimental method Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 238000011049 filling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 235000019198 oils Nutrition 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 238000012827 research and development Methods 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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Abstract
The invention relates to a method and a device for testing dust holding capacity of filter paper. Which comprises the following steps: 1) Placing the filter paper in a closed environment; regulating the pressure of the closed environment to be P 1 The method comprises the steps of carrying out a first treatment on the surface of the 2) Mixing pollutant particles with a solvent to obtain pollutant mixed solution; continuously introducing the pollutant mixed solution into the closed environment, and filtering by using the filter paper until the pressure of the closed environment rises to P 2 The P is 2 And P 1 When the difference reaches a preset value, stopping introducing the pollutant mixed solution, and recovering the filter paper; 3) Calculating the dust holding capacity of the filter paper according to the formula: filter paper dust holding capacity = m/S; wherein m is the weight of the filtered contaminant particles in g; s is the area of the filter paper, and the unit is m 2 . The testing method is relatively direct, only the flow of the pollutant mixed liquid and the pressure of the filter paper testing cavity are required to be controlled, and the testing device is simple in design and can overcome the defects of large volume and long testing time of the traditional equipment.
Description
Technical Field
The invention belongs to the technical field of filter paper dust holding capacity test, and particularly relates to a filter paper dust holding capacity test method and device.
Background
The dust holding capacity of the filter paper is an important performance index in the filtering performance of the filter paper, and is a visual representation of the service life of the filter paper. The filter material can gradually increase the material resistance in the process of intercepting pollutants, and the dust holding capacity is the total mass of the filter material for intercepting the pollutants when the resistance reaches a specified value.
Research on oil filtering materials in recent decades mainly focuses on improvement of filtering precision, the service life of filtering material filter paper is prolonged by sacrificing the thickness of the filtering material and replacing the filtering material by replacing the filtering material for multiple times, however, along with rapid development of technology, the filtering material is developed towards the directions of light weight, thinness and high efficiency. In the research, it is found that the dust holding capacity of the filter paper can be effectively adjusted by adjusting the ratio of coarse and fine fibers of the filter paper, the porosity of the filter paper, the concentration of pollutants, the size distribution of pollutant particles and the like, for example, the dust holding capacity can be increased when the ratio of coarse and fine fibers is more and less; the coarse fiber is arranged on the upper layer and the fine fiber is arranged on the lower layer, so that the dust holding capacity can be improved and the filtering precision can be improved, but on the premise of ensuring certain filtering precision of the filter paper, the dust holding capacity is improved, the service life of the filter paper is prolonged, the use amount of the coarse fiber cannot be simply and simply improved, different gradient structures are required to be constructed by the fine fiber, and the dust holding capacity of each structure is required to be tested.
At present, an instrument for testing the filtration performance of the oil filter paper is a multi-way testing system with large occupied area, and the instrument is mainly used for testing the filtration precision of the oil filter paper, is not special testing equipment with the capacity of containing dirt, and has the advantages of high testing price, complex testing process and long time consumption. In the early stage of development of the novel filter paper, a large amount of experimental exploration is needed to master the influence of some process parameters on the dust holding capacity of the filter paper, and a multi-way test system is adopted, so that the test cost is high, the consumed time is long, the cost of experimental exploration is increased, and the experimental exploration time is prolonged.
Disclosure of Invention
The invention mainly aims to provide a method and a device for testing dust holding capacity of filter paper, and aims to solve the technical problem of providing the method and the device for testing dust holding capacity of filter paper, which can test dust holding capacity of filter paper by adopting a conversion method, and solve the problems that the traditional equipment is large in size, multiple in pipelines, long in testing time, high in cost and unsuitable for testing at the beginning of a laboratory.
The aim and the technical problems of the invention are realized by adopting the following technical proposal. The invention provides a testing method for dust holding capacity of filter paper, which comprises the following steps:
1) Placing the filter paper in a closed environment; regulating the pressure of the closed environment to be P 1 ；
2) Mixing pollutant particles with a solvent to obtain pollutant mixed solution; continuously introducing the pollutant mixed solution into the closed environment, and filtering by using the filter paper until the pressure of the closed environment rises to P 2 The P is 2 And P 1 When the difference reaches a preset value, stopping introducing the pollutant mixed solution, and recovering the filter paper
3) Calculating the dust holding capacity of the filter paper according to the formula:
filter paper dust holding capacity = m/S;
wherein m is the weight of the filtered contaminant particles in g; s is the area of the filter paper and is 2m.
Preferably, in the foregoing test method, in step 1), before the filter paper is placed in the closed environment, the filter paper needs to be dried and weighed;
in the step 2), the recovered filter paper is dried and weighed;
the weight of the filtered contaminant particles is calculated as follows:
m＝m 2 -m 1
m 1 the weight of the filter paper before filtration is given in g; m is m 2 The weight of the filter paper after drying is given in g; m is the weight of the filtered contaminant particles in g.
Preferably, in the foregoing test method, in step 2), after recovering the filter paper, recovering the pollutant particles in the pollutant mixture in the closed environment, and weighing;
the weight of the filtered contaminant particles is calculated as follows:
m＝m 3 -m 4
wherein m is 3 The weight of pollutant particles in the pollutant mixed solution is continuously introduced into the closed environment, and the unit g is; m is m 4 The weight of pollutant particles in the recovered pollutant mixed solution is in g;
the m is 3 The calculation formula of (2) is as follows:
m 3 ＝Q×t×C
q is the flow of continuously introducing the pollutant mixed solution into the closed environment, and the unit is L/min; t is the time of continuously introducing the pollutant mixed solution into the closed environment, and the unit is min; c is the concentration of the pollutant mixture, and the unit is g/L.
Preferably, the concentration of the contaminant mixture is from 0.01 g/L to 50g/L.
Preferably, in the foregoing test method, the flow rate of the pollutant mixture continuously introduced into the closed environment is 0.1-10L/min.
Preferably, the foregoing test method, wherein the contaminant particles are selected from at least one of dust, gravel, and metal chips; the solvent is at least one selected from water, vegetable oil and mineral oil.
Preferably, the aforementioned test method, wherein the recovering filter paper requires pressure relief from the closed environment.
Preferably, the aforementioned test method, wherein the contaminant particles are selected from ISO 12103-1A3 medium grade test dust.
Preferably, in the foregoing test method, in step 1), the filter paper needs to be dried before weighing the filter paper.
The aim of the invention and the technical problems are also achieved by adopting the following technical proposal. According to the invention, the testing device for the dust holding capacity of the filter paper comprises the following components in sequence:
a pollutant reservoir comprising a liquid reservoir 3 and an air pump 1 fitted to the liquid reservoir; the air pump 1 is provided with a pressure reducing and regulating device 2; a filter paper dust-holding capacity tester, which comprises a filter paper testing cavity 11; a filter paper frame 13 is arranged in the filter paper testing cavity 11; a pressure gauge 8 is arranged outside the filter paper testing cavity 11; the filter paper testing cavity 11 is connected with the liquid storage tank 3 through a liquid inlet pipe 15; the joint of the liquid inlet pipe 15 and the filter paper testing cavity 11 is a liquid inlet; the filter paper frame 13 is arranged below the liquid inlet.
Preferably, the foregoing test apparatus further includes:
the sealing cover 10 is arranged on the filter paper testing cavity 11; the sealing cover 10 is provided with a vent valve 9 and the pressure gauge 8;
a liquid flow meter 6 and a liquid inlet valve 7, said liquid flow meter 6 and liquid inlet valve 7 being arranged on said liquid inlet pipe 15.
Preferably, the foregoing test apparatus further includes:
a window 12 is arranged on the filter paper testing cavity 11; a graduated scale is arranged on the window 12;
a retriever 14, the retriever 14 being disposed below the filter paper testing chamber 11;
a stirring paddle 4, wherein the stirring paddle 4 is positioned in the liquid storage tank 3; the stirring paddle 4 is connected with a motor 5.
By means of the technical scheme, the method and the device for testing the dust holding capacity of the filter paper provided by the invention have at least the following advantages:
the invention firstly carries out the filter paperRow weighing m 1 Placing the filter paper on a filter paper frame in a filter paper test cavity, introducing pollutant mixed solution into the filter paper test cavity, filtering the pollutant mixed solution by using filter paper, gradually increasing the resistance of the filter paper in the process of intercepting pollutant particles, gradually increasing the liquid level in the filter paper test cavity to compress the gas in the filter paper test cavity when the filtering function of the filter paper reaches the limit and the filtering effect cannot be exerted, gradually increasing the gas pressure when the pressure difference reaches a preset value, closing a liquid inlet valve, taking out the filter paper, drying the filter paper, and measuring the mass m of the filter paper 2 Finally, calculating the difference between the weights of the filter paper before and after filtration to obtain the weight of the filtered pollutant particles, and dividing the weight by the area of the filter paper to obtain the dust holding capacity of the filter paper.
According to the invention, the air pump is utilized to output the pollutant mixed liquid from the liquid storage tank, the pollutant mixed liquid is finally sent into the filter paper testing cavity through the liquid inlet pipe, the flow of continuously introducing the pollutant mixed liquid into the closed environment can be obtained through the liquid flowmeter arranged on the liquid inlet pipe, and at the moment, the dust holding capacity test of the filter paper is started and timing is started;
when the pressure difference reaches a preset value, the liquid inlet valve is closed and timing is stopped, so that the time for continuously introducing the pollutant mixed liquid into the closed environment can be obtained, and the weight of pollutant particles continuously introduced into the pollutant mixed liquid into the closed environment can be obtained through calculation because the concentration of the pollutant mixed liquid is known;
and recovering the residual pollutant mixed solution in the filter paper testing cavity, separating pollutant particles, weighing the separated pollutant particles, calculating the weight of the filtered pollutant particles, and dividing the weight by the area of the filter paper to obtain the dust holding capacity of the filter paper.
The invention adopts a conversion method, and tests the dust holding capacity of the filter paper by testing the pressure of the filter paper testing cavity. The testing method is relatively direct, only the flow of the pollutant mixed liquid and the pressure of the filter paper testing cavity are required to be controlled, and the testing device is simple in design and can overcome the defects of large volume and long testing time of the traditional equipment.
The method and the device for testing the dust holding capacity of the filter paper can be used in a laboratory, and the testing time and the testing cost in the early stage of filter paper research and development are shortened.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a device for testing dust holding capacity of filter paper.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following is a detailed description of specific implementation, structure, characteristics and effects of the method and device for testing dust holding capacity of filter paper according to the invention in combination with the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
The invention provides a testing method for dust holding capacity of filter paper, which comprises the following steps:
1) Placing the filter paper in a closed environment; regulating the pressure of the closed environment to be P 1 ；
2) Mixing pollutant particles with a solvent to obtain pollutant mixed solution; continuously introducing the pollutant mixed solution into the closed environment, and filtering by using the filter paper until the pressure of the closed environment rises to P 2 The P is 2 And P 1 When the difference reaches a preset value, stopping introducing the pollutant mixed solution, and recovering the filter paper;
3) Calculating the dust holding capacity of the filter paper according to the formula:
filter paper dust holding capacity = m/S;
wherein m is the weight of the filtered contaminant particles in g; s is the area of the filter paper and is 2m.
The preset value in the step 2) is within the range of 30 Pa-1 MPa, but cannot be 0, because: if the preset value is 0, the filter function of the filter paper under test cannot be judged to reach the limit, so that the test fails and the experimental data are wrong; secondly, the preset value can be set by the size of the filter paper to be tested, for example: when the filter paper prepared by the filter paper with the diameter of 5 mu m is cut into round paper with the diameter of 8cm, a preset value of 70-90 Kpa can be set; when the test precision of the filter paper is finer and the diameter is smaller, a preset value can be set to be 30-100 Pa; when the filter paper to be tested is a filter paper used in large-scale industrial production, a preset value of 200 to 300Kpa may be set in this case.
Preferably, in the foregoing test method, in step 1), before the filter paper is placed in the closed environment, the filter paper needs to be dried and weighed;
in the step 2), the recovered filter paper is dried and weighed;
the weight of the filtered contaminant particles is calculated as follows:
m＝m 2 -m 1
m 1 the weight of the filter paper before filtration is given in g; m is m 2 The weight of the filter paper after drying is given in g; m is the weight of the filtered contaminant particles in g.
Preferably, in the foregoing test method, in step 2), after recovering the filter paper, recovering the pollutant particles in the pollutant mixture in the closed environment, and weighing;
the weight of the filtered contaminant particles is calculated as follows:
m＝m 3 -m 4
wherein m is 3 The weight of pollutant particles in the pollutant mixed solution is continuously introduced into the closed environment, and the unit g is; m is m 4 The weight of pollutant particles in the recovered pollutant mixed solution is in g;
the m is 3 The calculation formula of (2) is as follows:
m 3 ＝Q×t×C
q is the flow of continuously introducing the pollutant mixed solution into the closed environment, and the unit is L/min; t is the time of continuously introducing the pollutant mixed solution into the closed environment, and the unit is min; c is the concentration of the pollutant mixture, and the unit is g/L.
Preferably, the concentration of the contaminant mixture is from 0.3g/L to 20g/L.
The pollutant mixed liquid used in the invention is formed by mixing pollutant particles and water, the concentration of the pollutant mixed liquid is controlled to be 0.3-20 g/L, the pollutant mixed liquid with the concentration of 0.3-20 g/L can be used for enabling the pollutant mixed liquid to be transported more easily, the test time can be shortened, the pollutant mixed liquid is difficult to transport if the concentration of the pollutant mixed liquid is too high, and the transportation method adopted in the invention is to increase the pressure of the liquid storage tank through the air pump so as to force the pollutant mixed liquid in the liquid storage tank to flow into the filter paper test cavity.
Preferably, in the foregoing test method, the flow rate of the contaminant mixture is 1 to 15L/min.
The invention controls the flow of the pollutant mixed liquid to be 1-15L/min, and can stably raise the filter paper testing cavity, if the flow is too large, the liquid level of the pollutant mixed liquid in the filter paper testing cavity is too high, but the filtering speed of the filter paper is slower, so that the pressure of the filter paper testing cavity is directly raised to a preset value, and experimental data are wrong, and if the flow is too low, the testing time is increased.
Preferably, the foregoing test method, wherein the contaminant particles are selected from at least one of dust, gravel, and metal chips; the solvent is at least one selected from water, vegetable oil and mineral oil.
Preferably, the aforementioned test method, wherein the recovering filter paper requires pressure relief from the closed environment.
Preferably, the aforementioned test method, wherein the contaminant particles are selected from ISO 12103-1A3 medium grade test dust.
Preferably, in the foregoing test method, in step 1), the filter paper needs to be dried before weighing the filter paper.
The invention also provides a testing device for dust holding capacity of filter paper, as shown in figure 1, which sequentially comprises:
a pollutant reservoir comprising a liquid reservoir 3 and an air pump 1 fitted to the liquid reservoir; the air pump 1 is provided with a pressure reducing and regulating device 2;
a filter paper dust-holding capacity tester, which comprises a filter paper testing cavity 11; a filter paper frame 13 is arranged in the filter paper testing cavity 11; a pressure gauge 8 is arranged outside the filter paper testing cavity 11; the filter paper testing cavity 11 is connected with the liquid storage tank 3 through a liquid inlet pipe 15; the joint of the liquid inlet pipe 15 and the filter paper testing cavity 11 is a liquid inlet; the filter paper frame 13 is arranged below the liquid inlet.
Preferably, the foregoing test apparatus further includes:
the sealing cover 10 is arranged on the filter paper testing cavity 11; the sealing cover 10 is provided with a vent valve 9 and the pressure gauge 8;
a liquid flow meter 6 and a liquid inlet valve 7, said liquid flow meter 6 and liquid inlet valve 7 being arranged on said liquid inlet pipe 15.
Preferably, the foregoing test apparatus further includes:
a window 12 is arranged on the filter paper testing cavity 11; a graduated scale is arranged on the window 12;
a retriever 14, the retriever 14 being disposed below the filter paper testing chamber 11;
a stirring paddle 4, wherein the stirring paddle 4 is positioned in the liquid storage tank 3; the stirring paddle 4 is connected with a motor 5.
The prepared pollutant mixed solution with the concentration required by the experiment is sent into the liquid storage tank, the motor is started, and the stirring paddle rotates, so that pollutant particles and water are uniformly mixed;
then, the filter paper to be detected is dried, then the mass of the filter paper is weighed, and the filter paper is put on a filter paper frame in a filter paper testing cavity and fixed. Opening a vent valve to release the pressure in the filter paper testing cavity, namely, enabling the pressure gauge number on the sealing cover to be 0KPa;
the air pump is opened, the air flow is enabled to stably enter the liquid storage tank through the pressure reducing valve, the pollutant particle mixed liquid in the liquid storage tank passes through the liquid inlet pipe, the flow of the pollutant particle mixed liquid is controlled through the liquid flowmeter, and the pollutant particle mixed liquid enters the filter paper testing cavity.
And observing the pressure of the filter paper testing cavity through a pressure gauge on a sealing cover of the filter paper testing cavity, and closing a liquid inlet valve when the pressure gauge shows that the experimental pressure drop is reached, so as to stop the injection of the mixed liquid. Opening the emptying valve, opening the sealing cover, taking out the filter paper placed on the emptying valve, drying the filter paper, and measuring the mass m1 of the filter paper, wherein m1-m0 is the dust holding capacity of the filter paper.
The invention will be further described with reference to specific examples, which are not to be construed as limiting the scope of the invention, but rather as falling within the scope of the invention, since numerous insubstantial modifications and adaptations of the invention will now occur to those skilled in the art in light of the foregoing disclosure.
Unless otherwise indicated, materials, reagents, and the like referred to below are commercially available products well known to those skilled in the art; unless otherwise indicated, the methods are all methods well known in the art. Unless otherwise defined, technical or scientific terms used should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
Example 1
A method for testing dust holding capacity of filter paper, comprising the following steps:
1) Preparing a pollutant mixed solution with the concentration of 1g/L by mixing pollutant particles with water, filling 50L of the pollutant mixed solution with the concentration of 1g/L into a liquid storage tank, and starting a motor to continuously stir the pollutant mixed solution by a stirring paddle;
2) Cutting the filter paper prepared from 5 μm fiber into round paper with diameter of 8cm, and filtering with accuracy beta (20) More than or equal to 200, drying and weighing;
3) Placing the filter paper obtained in the step 2) into a filter paper testing cavity, fixing the filter paper in a filter paper frame, covering a sealing cover, and opening an emptying valve to enable the number of the pressure gauge to be 0KPa;
4) Starting an air pump, and adjusting a pressure reducing regulator to enable the pollutant mixed liquid obtained in the step 1) to enter a filter paper testing cavity at a speed of 1L/min through a liquid flowmeter;
5) When the liquid level reaches the zero scale mark through the observation of the window, the emptying valve is closed;
6) When the pressure gauge number reaches 70kPa, closing the liquid inlet valve, opening the emptying valve, opening the sealing cover, taking out the filter paper, drying the filter paper, and weighing the filter paper;
7) To increase the stability and reliability of the experimental data, the experiment was repeated 5 times, and the experimental data are shown in table 1.
Example 2
The difference from example 1 is that the experimental filter paper used in this example is a paper made of 3 μm fiber, specifically as follows:
a method for testing dust holding capacity of filter paper, comprising the following steps:
1) Preparing a pollutant mixed solution with the concentration of 1g/L by mixing pollutant particles with water, filling 50L of the pollutant mixed solution with the concentration of 1g/L into a liquid storage tank, and starting a motor to continuously stir the pollutant mixed solution by a stirring paddle;
2) Cutting the filter paper prepared from 3 μm fiber into round paper with diameter of 8cm, and filtering with accuracy beta (10) The weight of the product is equal to or more than 200, and the product is dried and weighed;
3) Placing the filter paper obtained in the step 2) into a filter paper testing cavity, fixing the filter paper in a filter paper frame, covering a sealing cover, and opening an emptying valve to enable the number of the pressure gauge to be 0KPa;
4) Starting an air pump, and adjusting a pressure reducing regulator to enable the pollutant mixed liquid obtained in the step 1) to enter a filter paper testing cavity at a speed of 1L/min through a liquid flowmeter;
5) When the liquid level reaches the zero scale mark through the observation of the window, the emptying valve is closed;
6) When the pressure gauge number reaches 70kPa, closing the liquid inlet valve, opening the emptying valve, opening the sealing cover, taking out the filter paper, drying the filter paper, and weighing the filter paper;
7) To increase the stability and reliability of the experimental data, the experiment was repeated 5 times, and the experimental data are shown in table 2.
Example 3
The difference from example 1 is that the experimental filter paper used in this example is a paper made from 1.5 μm fiber, specifically as follows:
a method for testing dust holding capacity of filter paper, comprising the following steps:
1) Preparing a pollutant mixed solution with the concentration of 1g/L by mixing pollutant particles with water, filling 50L of the pollutant mixed solution with the concentration of 1g/L into a liquid storage tank, and starting a motor to continuously stir the pollutant mixed solution by a stirring paddle;
2) Cutting the filter paper prepared from 1.5 μm fiber into round paper with diameter of 8cm, and filtering with accuracy beta (5) The weight of the product is equal to or more than 200, and the product is dried and weighed;
3) Placing the filter paper obtained in the step 2) into a filter paper testing cavity, fixing the filter paper in a filter paper frame, covering a sealing cover, and opening an emptying valve to enable the number of the pressure gauge to be 0KPa;
4) Starting an air pump, and adjusting a pressure reducing regulator to enable the pollutant mixed liquid obtained in the step 1) to enter a filter paper testing cavity at a speed of 1L/min through a liquid flowmeter;
5) When the liquid level reaches the zero scale mark through the observation of the window, the emptying valve is closed;
6) When the pressure gauge number reaches 70kPa, closing the liquid inlet valve, opening the emptying valve, opening the sealing cover, taking out the filter paper, drying the filter paper, and weighing the filter paper;
7) To increase the stability and reliability of the experimental data, the experiment was repeated 5 times, and the experimental data are shown in table 3.
Example 4
The difference from example 1 is that the concentration of the contaminant mixture used in this example was 0.3g/L, as follows:
a method for testing dust holding capacity of filter paper, comprising the following steps:
1) Preparing a pollutant mixed solution with the concentration of 1g/L by mixing pollutant particles with water, filling 50L of the pollutant mixed solution with the concentration of 0.3g/L into a liquid storage tank, and starting a motor to continuously stir the pollutant mixed solution by a stirring paddle;
2) Cutting the filter paper prepared from 5 μm fiber into round paper with diameter of 8cm, and filtering with accuracy beta (20) More than or equal to 200, drying and weighing;
3) Placing the filter paper obtained in the step 2) into a filter paper testing cavity, fixing the filter paper in a filter paper frame, covering a sealing cover, and opening an emptying valve to enable the number of the pressure gauge to be 0KPa;
4) Starting an air pump, and adjusting a pressure reducing regulator to enable the pollutant mixed liquid obtained in the step 1) to enter a filter paper testing cavity at a speed of 1L/min through a liquid flowmeter;
5) When the liquid level reaches the zero scale mark through the observation of the window, the emptying valve is closed;
6) When the pressure gauge number reaches 70kPa, closing the liquid inlet valve, opening the emptying valve, opening the sealing cover, taking out the filter paper, drying the filter paper, and weighing the filter paper;
7) To increase the stability and reliability of the experimental data, the experiment was repeated 5 times, and the experimental data are shown in table 4.
Example 5
The difference from example 1 is that the liquid in the contaminant mixture used in this example is hydraulic oil, and the total injected contaminant mass minus the collected and recovered contaminant mass is used in this example to calculate the filter paper capacity. The method comprises the following steps:
1) Mixing pollutant particles with hydraulic oil to prepare pollutant mixed solution with the concentration of 1g/L, filling 50L of pollutant mixed solution with the concentration of 1g/L into a liquid storage tank, and starting a motor to continuously stir the pollutant mixed solution by a stirring paddle;
2) Cutting the filter paper prepared from 5 μm fiber into round paper with diameter of 8cm, and filtering with accuracy beta (20) ≥200；
3) Placing the filter paper obtained in the step 2) into a filter paper testing cavity, fixing the filter paper in a filter paper frame, covering a sealing cover, and opening an emptying valve to enable the number of the pressure gauge to be 0KPa;
4) Starting an air pump, and adjusting a pressure reducing regulator to enable the pollutant mixed liquid obtained in the step 1) to enter a filter paper testing cavity at a speed of 1L/min through a liquid flowmeter;
5) When the liquid level reaches the zero scale mark, the emptying valve is closed and the time is recorded through the observation of the window;
6) When the pressure gauge number reaches 70kPa, recording time, closing a liquid inlet valve, opening an emptying valve, and collecting and weighing the weight of pollutant particles in the recovered pollutant mixed liquid;
7) To increase the stability and reliability of the experimental data, the experiment was repeated 5 times, and the experimental data are shown in table 5.
The results were as follows:
TABLE 1
TABLE 2
TABLE 3 Table 3
TABLE 4 Table 4
TABLE 5
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalents and modifications can be made to the above-mentioned embodiments without departing from the scope of the invention.
Claims (10)
1. The test method of the dust holding capacity of the filter paper is characterized by comprising the following steps of:
1) Placing the filter paper in a closed environment; regulating the pressure of the closed environment to be P 1 ；
2) Mixing pollutant particles with a solvent to obtain pollutant mixed solution; continuously introducing the pollutant mixed solution into the closed environment, and filtering by using the filter paper until the pressure of the closed environment rises to P 2 The P is 2 And P 1 When the difference reaches a preset value, stopping introducing the pollutant mixed solution, and recovering the filter paper;
3) Calculating the dust holding capacity of the filter paper according to the formula:
filter paper dust holding capacity = m/S;
wherein m is the weight of the filtered contaminant particles in g; s is the area of filter paper, unit 2
m。
2. The method according to claim 1, wherein in step 1), before the filter paper is placed in the closed environment, the filter paper is dried and weighed;
in the step 2), the recovered filter paper is dried and weighed;
the weight of the filtered contaminant particles is calculated as follows:
m＝m 2 -m 1
m 1 the weight of the filter paper before filtration is given in g; m is m 2 The weight of the filter paper after drying is given in g; m is the weight of the filtered contaminant particles in g.
3. The test method according to claim 1, wherein in step 2), after recovering the filter paper, the contaminant particles in the contaminant mixture in the closed environment are recovered and weighed;
the weight of the filtered contaminant particles is calculated as follows:
m＝m 3 -m 4
wherein m is 3 The weight of pollutant particles in the pollutant mixed solution is continuously introduced into the closed environment, and the unit g is; m is m 4 The weight of pollutant particles in the recovered pollutant mixed solution is in g;
the m is 3 The calculation formula of (2) is as follows:
m 3 ＝Q×t×C
q is the flow of continuously introducing the pollutant mixed solution into the closed environment, and the unit is L/min; t is the time of continuously introducing the pollutant mixed solution into the closed environment, and the unit is min; c is the concentration of the pollutant mixture, and the unit is g/L.
4. The test method according to claim 1, wherein the concentration of the contaminant mixture is 0.3 to 20g/L; and continuously introducing the pollutant mixed solution into the closed environment at a flow rate of 1-15L/min.
5. The test method of claim 1, wherein the contaminant particles are selected from at least one of dust, gravel, and metal debris; the solvent is at least one selected from water, vegetable oil and mineral oil.
6. The method of claim 1, wherein the pressure in the sealed environment is relieved prior to recycling the filter paper.
7. The method according to claim 2, wherein in step 1), the filter paper is dried before weighing the filter paper.
8. The utility model provides a testing arrangement of filter paper dust holding volume which characterized in that, it includes in proper order:
a contaminant reservoir including a liquid reservoir and an air pump mounted on the liquid reservoir; the air pump is provided with a pressure reducing and regulating device;
a filter paper dust holding capacity tester, which comprises a filter paper testing cavity; a filter paper frame is arranged in the filter paper testing cavity; a pressure gauge is arranged outside the filter paper testing cavity; the filter paper testing cavity is connected with the liquid storage tank through a liquid inlet pipe; the joint of the liquid inlet pipe and the filter paper testing cavity is a liquid inlet; the filter paper frame is arranged below the liquid inlet.
9. The device for testing dust holding capacity of filter paper according to claim 8, further comprising:
the sealing cover is arranged on the filter paper testing cavity; the sealing cover is provided with an emptying valve and the pressure gauge;
the liquid flowmeter and the liquid inlet valve are arranged on the liquid inlet pipe.
10. The device for testing the dust holding capacity of filter paper according to claim 8 or 9, further comprising:
the window is arranged on the filter paper testing cavity; a graduated scale is arranged on the window;
the recoverer is arranged below the filter paper testing cavity;
the stirring paddle is positioned in the liquid storage tank; the stirring paddle is connected with the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310696304.5A CN116718508A (en) | 2023-06-13 | 2023-06-13 | Method and device for testing dust holding capacity of filter paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310696304.5A CN116718508A (en) | 2023-06-13 | 2023-06-13 | Method and device for testing dust holding capacity of filter paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116718508A true CN116718508A (en) | 2023-09-08 |
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ID=87872923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310696304.5A Pending CN116718508A (en) | 2023-06-13 | 2023-06-13 | Method and device for testing dust holding capacity of filter paper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116718508A (en) |
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2023
- 2023-06-13 CN CN202310696304.5A patent/CN116718508A/en active Pending
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