Fiber tube air permeability testing device

Abstract

The utility model provides a fiber tube air permeability testing device. The fiber tube air permeability testing device comprises a testing tank, a partition plate, a fiber tube, a sealing piece, a pressurizing tank and a pressure testing piece, wherein the partition plate is arranged in the testing tank and divides the testing tank into a first cavity and a second cavity, the sealing piece seals one end, extending into the second cavity, of the fiber pipe, the pressurizing tank is communicated with the second cavity of the testing tank body through the gas conveying pipe, and the pressure measuring piece is used for measuring the pressure difference between the first cavity and the second cavity. According to the fiber pipe air permeability measuring device provided by the embodiment of the invention, the sealing element seals the pipe opening of the end, extending into the second cavity, of the fiber pipe, and gas filled into the pressurizing tank in the second cavity can only flow into the first cavity through the air hole in the side face of the fiber pipe, so that the working process of the fiber pipe is simulated.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of flue gas filtration, in particular to a fiber tube air permeability testing device. BACKGROUND

[0002] Ceramic fiber filter tubes play a crucial role in the purification treatment of waste gas. During use, flue gas enters the tube through the pores on the side of the ceramic fiber filter tube, at which time the dust particles in the flue gas deposit on the surface of the filter tube. The dust on the surface of the filter tube is blown off into a dust collector through a back blowing process. Resistance is generated when the flue gas passes through the pores on the side of the ceramic fiber filter tube, so that air permeability is used to judge the level of air permeability of the ceramic fiber filter tube, that is, the pressure drop generated after different flow fluids pass through the porous material.

[0003] There are mainly two methods for testing air permeability, namely constant pressure difference flow measurement and constant flow pressure difference measurement. Among them, the constant pressure difference flow measurement method means that a constant pressure difference is maintained on both sides of the sample, and the air flow through the given area of the sample in a certain time is tested to calculate the air permeability of the sample; the constant flow pressure difference measurement method means that the air flow vertically through the sample is kept constant, and the pressure difference between the two sides of the sample under this condition is tested to obtain the air permeability of the sample; in addition, both methods use the following air permeability calculation formula:

[0004]

[0005] In the formula, K g — air permeability, unit m 3 / (h·KPa·m 2 );

[0006] Q— gas flow, unit m 3 / h;

[0007] △P— pressure drop generated after the gas passes through the porous material, unit KPa;

[0008] A— area of the test part of the porous material, unit m 2 ;

[0009] The existing detection method is to cut small pieces from large-size samples for detection, which on the one hand destroys the sample and makes the sample unable to be used normally, causing waste; on the other hand, the small sample cannot represent the performance of the whole sample, and the working environment of the fiber tube cannot be simulated during the test process, resulting in low test accuracy. At the same time, only normal temperature compressed air is used for detection, which cannot verify the resistance of the ceramic fiber filter tube to the filtered gas at high temperature. CONTENT OF THE INVENTION

[0010] One technical problem to be solved by the present disclosure is that small sample detection has low precision and cannot simulate the working environment state of the fiber tube.

[0011] To solve the above technical problems, the present disclosure provides a fiber tube air permeability testing device, which comprises:

[0012] a test tank;

[0013] a partition plate arranged in the test tank and separating the test tank into a first cavity and a second cavity;

[0014] a fiber tube passing through the partition plate, two ends of the fiber tube being located in the first cavity and the second cavity, respectively;

[0015] a sealing member sealing one end of the fiber tube extending into the second cavity;

[0016] a pressurizing tank in communication with the second cavity of the test tank body through a gas conveying pipe;

[0017] a pressure measuring mechanism for measuring the pressure difference between the first cavity and the second cavity.

[0018] In some embodiments, a heater is arranged between the pressurizing tank and the test tank, and the heater is used to heat the gas in the gas conveying pipe.

[0019] In some embodiments, the gas conveying pipe comprises a first section for connecting the pressurizing tank and the heater and a second section for connecting the heater and the test tank, and a first gas valve and a second gas valve are arranged on the first section and the second section, respectively.

[0020] In some embodiments, a third gas valve is arranged at the top end of the test tank for discharging the gas in the first cavity, and a fourth gas valve is arranged at the bottom side of the test tank for discharging the gas in the second cavity.

[0021] In some embodiments, the sealing member comprises a sealing seat, and a mounting groove is arranged on the sealing seat, and the fiber tube is inserted into the mounting groove.

[0022] In some embodiments, a support column (107) is arranged in the test tank and supported between the bottom surface of the test tank and the bottom surface of the sealing seat.

[0023] In some embodiments, a circular through slot is formed at the center of the partition plate for the fiber tube to pass through, and a second sealing ring is arranged on the inner circumferential surface of the partition plate for sealing between the fiber tube and the partition plate.

[0024] In some embodiments, a support table is arranged in the test tank, and the partition plate is placed on the support table.

[0025] In some embodiments, a first sealing ring is arranged between the partition plate and the support table for sealing between the partition plate and the support table.

[0026] In some embodiments, the fiber tube air permeability testing device further comprises a fixing member connected to the connecting hole on the outer periphery of the partition plate from the outside of the testing tank through the side of the testing tank.

[0027] Through the above technical solution, the sealing member in the fiber tube air permeability measuring device seals the pipe opening of the one end of the fiber tube inserted into the second cavity, and the gas filled in the pressurized tank in the second cavity can only flow into the first cavity through the air holes on the side of the fiber tube, thereby simulating the working process of the fiber tube. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0029] Figure 1 is a structural schematic diagram of the fiber tube air permeability testing device disclosed by the embodiments of the present disclosure;

[0030] Figure 2 is a structural schematic diagram of the partition plate disclosed by the embodiments of the present disclosure.

[0031] Explanation of reference signs:

[0032] 1, testing tank; 101, first cavity; 102, second cavity; 103, support table; 104, first sealing ring; 105, third air valve; 106, fourth air valve; 107, support column; 2, partition plate; 201, circular through slot; 202, second sealing ring; 3, fiber tube; 4, sealing member; 401, sealing seat; 402, mounting groove; 5, pressurized tank; 6, pressure measuring member; 601, pressure sensor; 602, second pressure sensor; 7, gas conveying pipe; 701, first air valve; 702, second air valve; 8, fixing member; 9, heater; 10, high-temperature gas volume flow meter. DETAILED DESCRIPTION

[0033] The embodiments of the present disclosure will be further described in detail below in combination with the drawings and embodiments. The detailed description of the following embodiments and the drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure, and the present disclosure can be implemented in many different forms, and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0034] The present disclosure provides these examples to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangement of components and steps, the components of materials, numerical expressions and numerical values set forth in these examples should be interpreted as merely exemplary, not as a limitation.

[0035] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the purpose of facilitating the description of the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the present disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] In addition, "first", "second", and similar words used in the present disclosure do not indicate any order, number or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0037] It should also be noted that, in the description of the present disclosure, unless otherwise specifically specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; It can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances. When it is described that a specific device is located between the first device and the second device, there can be an intermediate device between the specific device and the first device or the second device, or there can be no intermediate device.

[0038] All terms used in the present disclosure have the same meaning as understood by those skilled in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or extremely formalized sense, unless otherwise defined explicitly herein.

[0039] Techniques, methods, and equipment known to those skilled in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and equipment should be considered as part of the specification.

[0040] Embodiments

[0041] Reference Figure 1 It can be known that the air permeability testing device of the fiber tube 3 comprises:

[0042] a test tank 1;

[0043] a partition plate 2 arranged in the test tank 1 and separating the test tank 1 into a first cavity 101 and a second cavity 102;

[0044] a fiber tube 3 passing through the partition plate 2, two ends of the fiber tube 3 being located in the first cavity 101 and the second cavity 102 respectively;

[0045] a sealing member 4 sealing one end of the fiber tube 3 extending into the second cavity 102;

[0046] a pressurized tank 5 communicating with the second cavity 102 of the test tank 1 through a gas conveying pipe 7;

[0047] a pressure testing member for measuring the pressure difference between the first cavity 101 and the second cavity 102.

[0048] In the above technical solution, the first cavity 101 and the second cavity 102 can only communicate through the fiber tube 3, and when a pressure difference occurs between the first cavity 101 and the second cavity 102, the gas in the cavity with relatively higher air pressure will flow into the cavity with relatively lower air pressure through the fiber tube 3.

[0049] In the above technical solution, the pressurized tank 5 contains high-pressure gas, and the gas can be filled into the second cavity 102 to increase the pressure in the second cavity 102, so as to form a pressure difference between the second cavity 102 and the first cavity 101.

[0050] It can be understood that when the pressure in the second cavity 102 is greater than that in the first cavity 101, the gas in the second cavity 102 cannot directly enter the fiber tube 3 through the pipe opening sealed by the sealing member 4, and thus the gas in the second cavity 102 can only flow into the fiber tube 3 through the air holes on the side of the fiber tube 3 and then flow into the first cavity 101 through the pipe opening at the other end of the fiber tube 3.

[0051] Through the above technical solution, the sealing member 4 in the air permeability testing device of the fiber tube 3 seals the pipe opening of the fiber tube 3 extending into the second cavity 102, and the gas filled into the second cavity 102 by the pressurized tank 5 can only flow into the first cavity 101 through the air holes on the side of the fiber tube 3, thereby simulating the working process of the fiber tube 3.

[0052] In some embodiments, a heater 9 is arranged between the pressurized tank 5 and the test tank 1, and the heater 9 is used to heat the gas in the gas conveying pipe 7, so as to measure the air permeability of the fiber tube 3 at different working temperatures.

[0053] In some embodiments, the gas supply pipe 7 comprises a first section for connecting the pressurized tank 5 with the heater 9 and a second section for connecting the heater 9 with the test tank 1, and the first gas valve 701 and the second gas valve 702 are respectively arranged on the first section and the second section.

[0054] The first gas valve 701 and the second gas valve 702 are respectively arranged on the first section and the second section of the gas supply pipe 7 to control the on-off state of the first section and the second section, and the valve opening of the first gas valve 701 and the second gas valve 702 can also be controlled to control the gas flow in the gas supply pipe 7.

[0055] In addition, the second section of the gas supply pipe 7 is provided with a high-temperature gas volume flow meter 10 for measuring the gas flow filled into the second cavity 102.

[0056] In some embodiments, the pressure measuring member 6 comprises a first pressure sensor 601 arranged at the top end of the test tank 1 and a second pressure sensor 602 arranged at the bottom side of the test tank 1.

[0057] The first pressure sensor 601 is arranged at the top end of the test tank 1 to measure the pressure in the first cavity 101, and the second pressure sensor 602 is arranged at the bottom side of the test tank 1 to measure the pressure in the second cavity 102.

[0058] In some embodiments, the top end of the test tank 1 is provided with a third gas valve 105 for discharging the gas in the first cavity 101, and the bottom side of the test tank 1 is provided with a fourth gas valve 106 for discharging the gas in the second cavity 102.

[0059] The valve opening of the third gas valve 105 and the fourth gas valve 106 can be controlled to control the gas flow.

[0060] The present disclosure adopts the constant pressure difference flow measurement method, and the formula for calculating the air permeability is as follows:

[0061]

[0062] K g Air permeability, unit: m3 / (h·KPa·m2);

[0063] Q—Gas flow, unit: m3 / h;

[0064] △P—Pressure drop generated after the gas passes through the porous material, unit: KPa;

[0065] A—Area of the test part of the porous material, unit: m2;

[0066] In the present disclosure, the first gas valve 701 and the second gas valve 702 are fully opened to make the high-pressure gas in the pressurized tank 5 flow into the heater 9 through the first section of the gas pipe 7, and then flow into the second cavity 102 through the second section of the gas pipe 7 after being heated by the heater 9, so as to increase the gas pressure in the second cavity 102.

[0067] When the pressure difference between the gas pressure in the second cavity 102 and the gas pressure in the first cavity 101 reaches a predetermined value, i.e., the value of the pressure drop ΔP in the formula, the third gas valve 105 is opened and the valve opening degree thereof is controlled to make the gas in the first cavity 101 flow out of the test tank 1, so as to keep the gas pressure in the first cavity 101 unchanged. At the same time, the valve opening degrees of the first gas valve 701 and the second gas valve 702 are adjusted to keep the gas pressure in the second cavity 102 unchanged.

[0068] It can be understood that after the gas pressures in the first cavity 101 and the second cavity 102 are unchanged, the gas flow in the test tank 1 reaches a dynamic balance, i.e., the volume of the gas in the test tank 1 is constant, that is, the gas flow rate of the gas in the second cavity 102, the gas flow rate of the gas in the second cavity 102 flowing through the fiber pipe 3 into the first cavity 101, and the gas flow rate of the gas output from the first cavity 101 to the outside of the test tank 1 are all the same. At this time, the gas flow rate Q in the formula can be obtained by measuring the gas flow rate value of the second section of the gas pipe 7.

[0069] In the present disclosure, the sealing member 4 can have any appropriate mechanism. As shown in the embodiment shown in Figure 1 It can be understood that the sealing member 4 includes a sealing seat 401, and the sealing seat 401 is provided with a mounting groove 402, and the fiber pipe 3 is inserted into the mounting groove 402.

[0070] The mounting groove 402 is in interference fit with the fiber pipe 3, so as to improve the sealing performance of the sealing seat 401 to the fiber pipe 3, and the sealing seat 401 with the mounting groove 402 of the corresponding size can be replaced according to the fiber pipe 3 of different sizes.

[0071] In some embodiments, the test tank 1 is provided with a support column 107, which is supported between the test tank 1 and the sealing seat 401, so as to avoid the sealing seat 401 from falling off the fiber pipe 3 and the fiber pipe 3 from falling off the fixing plate, and at the same time, the vertical height of the fiber pipe 3 relative to the bottom of the test tank 1 is limited.

[0072] The sealing seat 401 and the support column 107 are detachably connected.

[0073] In some embodiments, the lower end surface of the sealing seat 401 can be provided with a fixing groove for inserting the support column 107, so as to fix the sealing seat 401 on the support column 107.

[0074] In some embodiments, referring to Figure 2It can be seen that the center of the partition plate 2 is provided with a circular through slot 201 for the fiber tube 3 to pass through, and the inner peripheral surface of the partition plate 2 is provided with a second sealing ring 202 for sealing between the fiber tube 3 and the partition plate 2.

[0075] The partition plate 2 is circular to adapt to the internal contour of the test tank 1, and the outer peripheral surface of the partition plate 2 is fitted with the inner wall surface of the test tank 1.

[0076] In some embodiments, the partition plate 2 is detachably connected with the test tank 1 body to facilitate installation of the fiber tube 3 in the test tank 1 body; of course, in some embodiments, the partition plate 2 and the test tank 1 can be an integrally formed piece.

[0077] In the present disclosure, the sealing seat 401 is fixed at one end of the fiber tube 3, and then the sealing seat 401 is connected to the support column 107 to fix the fiber tube 3 in the test tank 1. Secondly, the partition plate 2 is sleeved on the fiber tube 3 and placed on the support table 103.

[0078] In some embodiments, the test tank 1 is provided with a support table 103, and the partition plate 2 is placed on the support table 103.

[0079] In some embodiments, a first sealing ring 104 is arranged between the partition plate 2 and the support table 103 for sealing between the partition plate 2 and the support table 103 and the fitted place of the partition plate 2 and the test tank 1.

[0080] In some embodiments, the air permeability testing device for the fiber tube 3 further comprises a fixing member 8 which is connected to the connecting hole on the outer peripheral surface of the partition plate 2 from the outside of the test tank 1 through the side of the test tank 1 to fix the partition plate 2 in the test tank 1, avoiding that the gas in the second cavity 102 pushes it to move into the first cavity 101 under the action of pressure difference.

[0081] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0082] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A fiber tube air permeability testing device, characterized by, The device comprises: a test tank (1); a partition plate (2) arranged in the test tank (1) and separating the test tank (1) into a first cavity (101) and a second cavity (102); a fiber tube (3) penetrating through the partition plate (2), both ends of the fiber tube (3) being located in the first cavity (101) and the second cavity (102) respectively; a sealing member (4) sealing one end of the fiber tube (3) extending into the second cavity (102); a pressurized tank (5) communicating with the second cavity (102) of the test tank (1) through a gas conveying pipe (7); a pressure measuring member (6) for measuring the pressure difference between the first cavity (101) and the second cavity (102).

2. The Fibre Tube Air Permeability Tester Apparatus according to claim 1, wherein, A heater (9) is arranged between the pressurized tank (5) and the test tank (1) and used for heating the gas in the gas conveying pipe (7).

3. The Fibre Tube Air Permeability Tester Apparatus according to claim 2, wherein, The gas conveying pipe (7) comprises a first section for communicating the pressurized tank (5) with the heater (9) and a second section for communicating the heater (9) with the test tank (1), and a first gas valve (701) and a second gas valve (702) are arranged on the first section and the second section respectively.

4. The Fibre Tube Air Permeability Tester Apparatus according to claim 1, wherein, A third gas valve (105) is arranged at the top end of the test tank (1) and used for discharging the gas in the first cavity (101), and a fourth gas valve (106) is arranged at the bottom side of the test tank (1) and used for discharging the gas in the second cavity (102).

5. The Fibre Tube Air Permeability Tester Apparatus according to claim 1, wherein, The sealing member (4) comprises a sealing seat (401) provided with a mounting groove (402), and the fiber tube (3) is inserted into the mounting groove (402).

6. The Fibre Tube Air Permeability Tester Apparatus according to claim 5, wherein, A support column (107) is arranged in the test tank (1) and supported between the test tank (1) and the sealing seat (401).

7. The air permeability test apparatus for fibrous tubes according to claim 1, wherein A circular through slot (201) is formed in the center of the partition plate (2) for the fiber tube (3) to penetrate through, and a second sealing ring (202) is arranged on the inner peripheral surface of the partition plate (2) and used for sealing between the fiber tube (3) and the partition plate (2).

8. The Fibre Tube Air Permeability Tester Apparatus according to claim 1, wherein, A support table (103) is arranged in the test tank (1), and the partition plate (2) is placed on the support table (103).

9. The Fibre Tube Air Permeability Tester Apparatus according to claim 8, wherein, A first sealing ring (104) is arranged between the partition plate (2) and the support table (103) and used for sealing between the partition plate (2) and the support table (103).

10. The Fibre Tube Air Permeability Tester Apparatus according to claim 8, wherein, The device further comprises a fixing member (8) connected to the connecting hole on the outer peripheral surface of the partition plate (2) from the outside of the test tank (1) through the side surface of the test tank (1).

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