CN102125808B - Ionic membrane detection device - Google Patents

Abstract

The invention discloses an ionic membrane detection device, which has a simple structure and can determine whether leakage is needed to be mended or not and determine the specific positions of leakage points. The device comprises a box body with a cover body, wherein a sealing cavity is formed inside the box body; a ventilating structure capable of dividing the cavity inside the box body into an upper cavity and a lower cavity is arranged inside the box body; the upper cavity and the lower cavity are communicated by the ventilating structure; the shape of the top surface of the ventilating structure is adaptive with that of the ionic membrane, and a ventilating pressed membrane grid is arranged on the top surface of the ventilating structure; a gas transmission pipe communicated with the lower cavity is connected on the box body corresponding to the lower cavity, and the gas transmission pipe is connected with a gas source; and a gas outlet pipe communicated with the upper cavity is connected on the box body corresponding to the upper cavity, and a gas flowmeter is connected on the gas outlet pipe.

Description

Ion membrane detection device

technical field

The invention relates to an ion membrane detection device.

Background technique

Ion-exchange membrane (hereinafter referred to as ion-exchange membrane) is the core of ion-exchange membrane soda production process, and it is expensive and easily damaged. The ionic membrane has very high requirements for process stability. In daily operation, changes in pressure difference and improper storage and installation will cause damage to the ionic membrane. The damage of the ionic membrane mainly refers to a large number of leakage points on the ionic membrane. The ionic membrane is tested to confirm whether the leakage of the ionic membrane reaches the level that needs to be repaired. If it reaches this level, it needs to be repaired before continuing to use. Although the current ionic membrane leak testing process can determine whether the degree of leakage reaches the level that needs to be repaired, it cannot determine the specific position of the leak point on the ionic membrane, and the existing detection technology for determining the specific position of the leak point on the ionic membrane often cannot. To find out the leak point completely, the equipment is expensive, and the maintenance and use are very inconvenient.

Contents of the invention

The technical problem solved by the invention is to provide an ion membrane detection device with a simple structure.

The technical solution adopted by the present invention to solve the technical problem is: the ionic membrane detection device includes a box body with a cover, the inside of the box body forms a closed cavity, and the inside of the box body is provided with a cavity inside the box body. Divided into an upper chamber and a lower chamber with a ventilating structure, the upper chamber and the lower chamber are only connected through the ventilating structure, the shape of the top surface of the above ventilating structure is adapted to the shape of the ionic membrane and the top surface of the ventilating structure is provided with a ventilating pressure film grid grid; the box body corresponding to the lower chamber is connected with an air delivery pipe connected with the lower chamber, and the air delivery pipe is connected with the gas source; count.

Further, the air-permeable structure is a metal mesh.

Further, the box body corresponding to the upper cavity is the upper box body, the box body corresponding to the lower cavity is the lower box body, the upper box body and the lower box body are detachably connected, and the ventilation structure is installed on the lower box body The top of the air-permeable pressure-film grid is installed on the bottom of the upper box, and the cover is arranged on the top of the upper box.

Further, a pressure limiting device is installed on the gas delivery pipe.

Further, the pressure limiting device includes a pressure limiting branch pipe and a container filled with liquid, one end of the pressure limiting branch pipe communicates with the gas delivery pipe, and the other end is inserted into the liquid in the container.

Further, a pressure measuring device communicating with the lower chamber is connected to the box body corresponding to the lower chamber.

Further, the lateral pressure device includes a pressure measuring branch pipe and a U-shaped pipe manometer, one end of the pressure measuring branch pipe communicates with the lower cavity, and the other end is connected with the U-shaped pipe manometer.

Further, a U-shaped overflow pipe communicating with the upper chamber is provided on the side wall of the box body corresponding to the upper chamber.

The beneficial effects of the present invention are: the detection device of the present invention has a simple structure, and on the one hand, it can determine whether the degree of leakage reaches the level that needs to be repaired; on the other hand, it can determine the specific position of the leakage point.

Description of drawings

Fig. 1 is the schematic diagram of the air-permeable structure inside the ionic membrane detection device of the present invention;

Fig. 2 is the schematic diagram of ion membrane detection device of the present invention;

3 is a schematic diagram of a pressure limiting device comprising a pressure limiting branch pipe and a container;

Fig. 4 is a schematic diagram of an upper chamber provided with a U-shaped overflow pipe.

Marked in the figure: 1-gas flow meter, 2-outlet pipe, 3-upper box, 4-U-shaped overflow pipe, 5-ventilated structure, 6-lower box, 7-lower chamber, 8-pressure measurement Branch pipe, 9-side pressure device, 10-air source, 11-pressure limiting device, 12-air delivery pipe, 13-upper cavity, 14-ventilated pressure film grid, 15-box, 16-cover, 17-limit Pressure branch pipe, 18-container, 19-U-shaped pipe pressure gauge.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1 and Fig. 2, the ionic membrane detection device comprises a box body 15 with a cover body 16, the inside of the box body 15 forms a closed cavity, and the inside of the box body 15 is provided with a box body inner cavity Divided into the air-permeable structure 5 of the upper chamber 13 and the lower chamber 7, the upper chamber 13 and the lower chamber 7 are only communicated through the air-permeable structure 5, the shape of the top surface of the above-mentioned air-permeable structure 5 is adapted to the shape of the ionic membrane and the top of the air-permeable structure 5 Air-permeable pressure-film grids 14 are arranged on the surface; the box body corresponding to the lower chamber 7 is connected with an air delivery pipe 12 communicating with the lower chamber 7, the air delivery pipe 12 is connected with the gas source 10, and the box body corresponding to the upper chamber 13 is connected with a The air outlet pipe 2 communicating with the upper cavity 13 is connected with the gas flow meter 1 . The shape of the top surface of the above-mentioned air-permeable structure is adapted to the shape of the ionic membrane, which means that the shape and size of the top surface of the air-permeable structure are the same as the shape and size of the ionic membrane. For example, if the ionic membrane is rectangular, the shape of the top surface of the air-permeable structure is also rectangular. And the ionic membrane can completely cover the top surface of the air-permeable structure. The above-mentioned air-permeable structure can be a flat plate, and a plurality of air-vent holes are arranged on the plate, and can also be a grid, etc., the preferred embodiment is: the air-permeable structure 5 is a metal mesh, which can ensure that the gas in the lower chamber flows into the upper chamber smoothly, which is beneficial to reduce The barrier effect of the breathable structure on the flow of gas. In addition, the above-mentioned air-permeable pressure-film grid 14 can also be replaced by a metal mesh or a flat plate with a plurality of air-ventilating holes.

When in use, open the cover and fix the ionic membrane on the top surface of the air-permeable structure. The fixing method can be to paste the ionic membrane on the top surface or press the edge of the ionic membrane on the top surface, etc., and make the ionic membrane The top surface of the air-permeable structure is completely covered, so that the gas in the lower chamber can only flow into the upper chamber through the ionic membrane, and then the air-permeable pressure-film grid is placed on the ionic membrane. The size of the air-permeable pressure-film grid can be determined according to the shape of the ionic membrane and The size is determined, and it is better to cover the entire area of the ion membrane, so as to ensure that the gas in the lower chamber will not break through the ion membrane when it goes up to the ion membrane, and then close the cover to form a closed cavity inside the box, and then The gas can be fed into the lower cavity of the box body through the gas delivery pipe. The gas can be nitrogen, etc. The pressure and flow rate of the gas can be determined according to the type of ion membrane to be detected, and then recorded on the gas flow meter on the gas outlet pipe per unit time. The value of the value can be obtained per unit time through the gas flow through the ion membrane, the more leakage points on the ion membrane, the more gas passing through the ion membrane per unit time, if the gas flow value per unit time exceeds the normal value, then It means that the ionic membrane needs to be repaired, otherwise it is not necessary, for example, 10L/H is a normal value, and if it exceeds this value, it needs to be repaired.

When it is necessary to determine the specific location of the leakage point on the ionic membrane, open the upper cover, and put a small amount of liquid, such as water, into the upward cavity, so that the liquid can cover the entire ionic membrane. Although there is a leak point on the ionic membrane, the general condition The lower liquid cannot flow into the lower cavity through the leakage point. If the liquid flows into the lower cavity through the leakage point, it means that the leakage point is too large, and it can be observed through visual inspection. At this time, it is not necessary to determine its specific location through the detection device of the present invention; Then the gas is passed into the lower cavity, and after the gas passes through the leakage point on the ion membrane, bubbles will be generated in the liquid above the ion membrane. By observing the position of the bubble, the specific position of the leakage point on the ion membrane can be determined. In the above process, if too much liquid is put into the upper chamber, it will be inconvenient to observe the specific position of the bubbles on the one hand, and the ion membrane may be damaged under the action of water pressure. In order to prevent the above situation from happening, as shown in Figure 4 As shown, the side wall of the box body corresponding to the upper chamber 13 is provided with a U-shaped overflow pipe 4 communicating with the upper chamber 13. When the liquid in the upper chamber is too much, the excessive liquid will overflow from the U-shaped Tube 4 flows out, so just can control the capacity of the liquid in the upper cavity, is conducive to the smooth progress of detection process. In addition, after the U-shaped overflow pipe 4 is provided, when detecting the leakage degree of the ionic membrane, that is, in the detection process of determining whether the ionic membrane needs to be repaired through the numerical value on the gas flow meter, it can be injected into the U-shaped overflow pipe 4 first. The liquid acts as a liquid seal, so that the gas in the upper chamber 13 will not flow out from the U-shaped overflow pipe 4, thereby facilitating the smooth progress of the detection process.

In order to facilitate placing the ionic membrane on the air-permeable structure, and to place the air-permeable pressure-membrane grid on the ionic membrane, the corresponding box body of the upper chamber 13 is the upper box body 3, and the corresponding box body of the lower chamber 7 is the lower box body. Box body 6, the upper box body 3 is detachably connected to the lower box body 6, the breathable structure 5 is installed on the top of the lower box body 6, and the air-permeable pressure-film grid 14 is installed on the bottom of the upper box body 3, The cover body 16 is arranged on the top of the upper box body 3 . When in use, lift the upper box body, place the ionic membrane on the air-permeable structure, and then connect the upper box body with the lower box body, the air-permeable pressure-membrane grid at the bottom of the upper box body is just on the ionic membrane, which can save The time used for detection improves detection efficiency.

In order to improve the safety of the detection process, a pressure limiting device 11 is installed on the gas delivery pipe 12 . When the gas pressure in the gas delivery pipe 12 is too high, the pressure limiting device 11 is automatically opened for pressure relief to prevent accidents. The pressure limiting device 11 can be a pressure limiting valve installed on the gas delivery pipe 12. A preferred embodiment is: as shown in FIG. One end of the branch pipe 17 communicates with the gas delivery pipe 12 , and the other end is inserted into the liquid in the container 18 . When the pressure in the gas delivery pipe 12 was a normal value, the gas pressure in the pressure limiting branch pipe 17 was also a normal value. At this time, the gas would not leak due to the presence of liquid in the pressure limiting branch pipe 17; When it is too large, the gas in the pressure-limiting branch pipe 17 will discharge the liquid in the pressure-limiting branch pipe 17 from the pipe, and then the gas in the gas delivery pipe 12 will be discharged into the liquid in the container 18 through the pressure-limiting branch pipe, and finally discharged to the outside atmospheric environment.

In order to improve the detection accuracy, a pressure measuring device 9 communicating with the lower chamber 7 is connected to the box body corresponding to the lower chamber 7 . Because the detection process needs to be carried out under a certain pressure, too high or too low pressure will affect the detection accuracy, so setting the pressure measuring device 9 is beneficial to ensure that the pressure is stable during the detection process. The above-mentioned pressure measuring device 9 can be a pressure gauge, and the preferred embodiment is: the side pressure device 9 includes a pressure measuring branch pipe 8 and a U-shaped pipe manometer 19, one end of the pressure measuring branch pipe 8 communicates with the lower chamber 7, and the other One end is connected with the U-shaped tube pressure gauge 19, and the above-mentioned structure can realize pressure detection through a simple structure.

Claims (8)

1. ionic membrane detection device comprises the box body (15) that has lid (16), and described box body (15) inside forms closed cavity, it is characterized in that: described box body (15) inside is provided with The inner cavity of the box body is divided into a ventilating structure (5) of an upper chamber (13) and a lower chamber (7). The upper chamber (13) and the lower chamber (7) are only communicated through the venting structure (5). The shape of the top surface of (5) is adapted to the shape of the ionic membrane and the top surface of the air-permeable structure (5) is provided with an air-permeable pressure-film grid (14); the box body corresponding to the lower cavity (7) is connected with the lower cavity ( 7) Connected air delivery pipe (12), the air delivery pipe (12) is connected to the air source (10), and the box body corresponding to the upper chamber (13) is connected with the air outlet pipe (2) connected with the upper chamber (13). A gas flow meter (1) is connected to the gas pipe (2). 2. The ionic membrane detection device according to claim 1, characterized in that: the air-permeable structure (5) is a metal mesh. 3. The ionic membrane detection device according to claim 1 or 2, characterized in that: the box body corresponding to the upper cavity (13) is the upper box body (3), and the box body corresponding to the lower cavity (7) is the lower box body A box body (6), the upper box body (3) is detachably connected to the lower box body (6), the air-permeable structure (5) is installed on the top of the lower box body (6), and the air-permeable film-pressed grid (14) is installed on the bottom of the upper box body (3), and the cover (16) is arranged on the top of the upper box body (3). 4. The ionic membrane detection device according to claim 1 or 2, characterized in that: a pressure limiting device (11) is installed on the gas delivery pipe (12). 5. ion membrane detection device as claimed in claim 4 is characterized in that: described pressure limiting device (11) comprises pressure limiting branch pipe (17) and the container (18) that liquid is housed, and described pressure limiting branch pipe (17) One end communicates with the air delivery pipe (12), and the other end is inserted into the liquid in the container (18). 6. The ionic membrane detection device according to claim 1 or 2, characterized in that: a pressure measuring device (9) communicating with the lower chamber (7) is connected to the box body corresponding to the lower chamber (7). 7. ion membrane detection device as claimed in claim 6, is characterized in that: described pressure measurement device (9) comprises pressure measurement branch pipe (8) and U-shaped tube manometer (19), and described pressure measurement branch pipe (8) ) one end communicates with the lower cavity (7), and the other end links to each other with the U-shaped tube pressure gauge (19). 8. The ionic membrane detection device according to claim 1 or 2, characterized in that: a U-shaped overflow pipe communicating with the upper chamber (13) is provided on the side wall of the box body corresponding to the upper chamber (13) (4). the

Images