CN115436590A

CN115436590A - Defoaming device for turbidity detection process

Info

Publication number: CN115436590A
Application number: CN202211070618.6A
Authority: CN
Inventors: 刘婵; 路瑞芳; 吴健春; 杨芳
Original assignee: Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Current assignee: Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-12-06

Abstract

The invention discloses a defoaming device used in a turbidity detection process. The device comprises: a turbidity detection cartridge, wherein a turbidity sensor is located within the turbidity detection cartridge when the bubble removal apparatus is in use; the defoaming filter cylinder is communicated with the turbidity detection cylinder through the connecting pipeline, a plurality of channels penetrating through the cylinder wall are arranged on the cylinder wall of the defoaming filter cylinder, each channel comprises an expansion part positioned at two ends and a straight part positioned in the middle, and the radial dimension of each expansion part is gradually reduced along the direction close to the straight part. The invention can eliminate bubble interference during turbidity detection.

Description

Defoaming device for turbidity detection process

Technical Field

The invention relates to the technical field of measurement, in particular to a defoaming device for a turbidity detection process.

Background

In industrial processes, it is often necessary to detect the turbidity of a material. For example, in the process of preparing the titanium dioxide sulfate added seed crystal, the quality of the seed crystal can be judged by carrying out online detection on the turbidity of the seed crystal. One of the difficulties faced in the online detection of turbidity is that the detection noise is relatively high, and the noise source is the bubble interference generated in the heating process.

Therefore, it is necessary to research a defoaming device to eliminate air bubbles in the turbidity detection environment to ensure that effective turbidity detection data is obtained.

Disclosure of Invention

The invention mainly aims to provide a defoaming device for a turbidity detection process, so as to eliminate the interference of bubbles on turbidity detection.

According to an aspect of the present invention, there is provided a defoaming apparatus for a turbidity detecting process, comprising: a turbidity detection cartridge, wherein a turbidity sensor is located within the turbidity detection cartridge when the bubble removal apparatus is in use; the defoaming filter cylinder is communicated with the turbidity detection cylinder through the connecting pipeline, a plurality of channels penetrating through the cylinder wall are arranged on the cylinder wall of the defoaming filter cylinder, each channel comprises an expanding part positioned at two ends and a straight part positioned in the middle, and the radial dimension of the expanding part is gradually reduced along the direction close to the straight part.

According to one embodiment of the invention, the wall of the anti-foaming cartridge comprises: the inner wall and the outer wall form a cavity, and the channel penetrates through the inner wall, the cavity and the outer wall.

According to one embodiment of the invention, the wall of the anti-foaming filter cylinder is of an integrally formed structure.

According to an embodiment of the invention, the apparatus further comprises: an ultrasonic bar disposed within the anti-foaming filter cartridge.

According to one embodiment of the invention, the ultrasonic rod is externally provided with a jacket layer, and the jacket layer is made of polytetrafluoroethylene materials.

According to one embodiment of the invention, the turbidity detecting cylinder, the defoaming filter cylinder and the connecting pipeline are all made of polytetrafluoroethylene materials.

According to one embodiment of the invention, the maximum radial dimension of the enlargement is 7mm; the radial dimension of the straight portion is 4mm; the length of the straight portion is 20mm.

According to one embodiment of the invention, the bottom wall of the turbidity detecting cylinder is obliquely arranged, so that the first side of the bottom wall is lower than the second side, an opening is formed at the joint of the side wall of the turbidity detecting cylinder and the first side of the bottom wall, and the connecting pipeline is connected to the opening; the connecting pipeline comprises a first end connected with the turbidity detecting cylinder and a second end connected with the defoaming filter cylinder, and the first end is not lower than the second end.

According to one embodiment of the invention, the connecting duct is arranged inclined so that the first end is higher than the second end, the inclination of the connecting channel corresponding to the inclination of the bottom wall of the turbidity detecting cylinder.

According to one embodiment of the invention, the bottom wall of the turbidity detecting cylinder is inclined at an angle of 10 ° with respect to the horizontal.

In the defoaming device for the turbidity detection process according to the embodiment of the invention, the wall of the defoaming filter cylinder is provided with a plurality of channels penetrating through the wall, and liquid to be detected outside the defoaming filter cylinder can enter the defoaming filter cylinder through the plurality of channels; the channel comprises expansion parts positioned at two ends and a straight part positioned in the middle, the air bubbles in the liquid to be detected can be subjected to compression-expansion alternate change in the process of passing through the channel, and the high-efficiency defoaming effect is realized through the continuous change of the pressure difference between the inside and the outside of the air bubbles; thereby get into the defoaming and strain the interior liquid of section of thick bamboo and be liquid after the defoaming, liquid and then get into turbidity through connecting tube and detect a section of thick bamboo after the defoaming, turbidity sensor detects the defoaming back liquid in the turbidity detects a section of thick bamboo, can avoid the bubble to the interference that turbidity detected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 shows a schematic diagram of a bubble removal apparatus for a turbidity detection process according to an embodiment of the present invention;

figure 2 shows a schematic view of the channels formed in the wall of the anti-foam cartridge of the anti-foam device of figure 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.

Fig. 1 shows a schematic diagram of a defoaming device 100 used in a turbidity detection process according to an embodiment of the present invention, and fig. 2 shows a schematic diagram of a channel 40 formed in a cylindrical wall 22 of a defoaming filter cartridge 20 of the defoaming device 100 in fig. 1. Referring to fig. 1 and 2, the defoaming apparatus 100 includes: a turbidity detecting cylinder 10, wherein the turbidity sensor 1 is located inside the turbidity detecting cylinder 10 when the defoaming apparatus 100 is in use; the defoaming filter cylinder 20 and the connecting pipeline 30 are arranged, the defoaming filter cylinder 20 is communicated with the turbidity detecting cylinder 10 through the connecting pipeline 30, the cylinder wall 22 of the defoaming filter cylinder 20 is provided with a plurality of channels 40 penetrating through the cylinder wall 22, each channel 40 comprises an expanding part 42 positioned at two ends and a straight part 44 positioned in the middle, and the radial dimension of each expanding part 42 is gradually reduced along the direction close to the straight part 44.

The defoaming device 100 can be used in the online detection process of the turbidity of the seed crystal added in the hydrolysis of titanium dioxide by the sulfuric acid process, when the defoaming device 100 is used, the defoaming device 100 is placed in a seed crystal preparation tank, when a seed crystal preparation (including a mixture of titanium liquid and alkali liquor) is added into the seed crystal preparation tank, the preparation can enter the defoaming filter cylinder 20 through a plurality of channels 40, bubbles in the preparation are eliminated when passing through the channels 40, so that the preparation entering the defoaming filter cylinder 20 is a defoamed preparation, and the defoamed preparation further enters the turbidity detection cylinder 10 through the connecting pipeline 30 and is detected by the turbidity sensor 1. That is, the turbidity sensor 1 detects the defoamed preparation, and can avoid the interference of bubbles on the turbidity detection. The dashed line in fig. 1 shows the liquid level of the seed preparation. The probe of the turbidity sensor 1 is inserted below the liquid level for detection.

The channel 40 includes an enlarged portion 42 at each end and a flat portion 44 in the middle, the channel 40 being generally dumbbell-shaped. According to the defoaming principle of the compression method, bubbles are compressed and destroyed when passing through a physical pore size or a pipeline having a smaller size than the bubbles themselves. The channel 40 is approximately dumbbell-shaped and has a structure of 'large aperture → small aperture → large aperture', so that the bubbles are enlarged again after size compression in the process of passing through the channel, and the bubbles which are compressed but not completely destroyed generate volume expansion of the bubbles again due to pressure difference, thereby achieving the purpose of secondary defoaming. Generally, the dumbbell-shaped channel 40 can achieve continuous pore diameter changes, thereby producing multiple physical changes of 'compressed-expanded' in the process of bubble passage, and achieving the purpose of high defoaming rate.

The enlarged portions 42 at both ends of the channel 40 are tapered structures, and the enlarged portions 42 at both ends may be mirror symmetric with respect to a center line therebetween. The radial dimension and length of the channel 40 may be determined according to the requirements of use, in combination with the size of the bubbles in the environment of use.

In an embodiment of the invention, the maximum radial dimension (a 1, a 3) of the enlarged portion 42 is 7mm; the radial dimension (a 2) of the straight portion 44 is 4mm; the length (b 2) of the straight portion 44 is 20mm; the length (b 1, b 3) of the enlarged portion 42 is 10-15mm. Thereby ensuring good defoaming effect.

The plurality of channels 40 may be evenly distributed on the cylindrical wall 22 of the antifoam cartridge 20. The plurality of channels 40 may be arranged in multiple layers along the circumferential and axial directions of the cylindrical wall 22, ensuring that the liquid to be measured can flow into the anti-foaming filter cartridge 20 quickly.

The turbidity detecting cylinder 10 and the defoaming filter cartridge 20 may have a cylindrical structure having an inner cavity, and the top of the turbidity detecting cylinder 10 and the defoaming filter cartridge 20 are open and the bottom is communicated with each other through a connecting pipe 30. The top of the turbidity detection cylinder 10 is provided with a flange 16, the flange 16 is provided with a mounting hole 17, and the turbidity detection cylinder 10 can be mounted by matching fasteners such as bolts and the like with the mounting hole 17. Similarly, the defoaming cartridge 20 is provided with a flange 26 at the top, the flange 26 is provided with a mounting hole 27, and the mounting of the defoaming cartridge 20 can be completed by the cooperation of a fastener such as a bolt and the like with the mounting hole 27.

In an embodiment of the present invention, the wall 22 of the anti-foaming filter cartridge 20 comprises: the inner wall 21, the outer wall 23, and the cavity 25 formed between the inner wall 21 and the outer wall 23, and the channel 40 penetrates through the inner wall 21, the cavity 25, and the outer wall 23.

In order to achieve a good elimination of air bubbles, the straight portion 44 of the channel 40 needs to have a certain length, and accordingly, the cylindrical wall 22 of the anti-foaming filter cartridge 20 needs to have a certain thickness. In this case, in order to reduce the weight of the defoaming cartridge 20, the cartridge wall 22 of the defoaming cartridge 20 is provided with a hollow structure, the cartridge wall 22 includes an inner layer wall 21 and an outer layer wall 23, and a cavity 25 is formed between the inner layer wall 21 and the outer layer wall 23.

The channel 40 and the connecting pipe 30 all penetrate through the inner wall 21, the cavity 25 and the outer wall 23, so that the channel 40 can communicate with the internal environment and the external environment of the cylinder wall 22, and the liquid to be measured in the inner cavity of the anti-foaming filter cylinder 20 enclosed by the inner wall 21 can enter the connecting pipe 30.

In some embodiments, enlarged portions 42 at each end of the channel 40 extend through the inner and

outer walls

21, 23, respectively, and a central flat portion 44 extends through the cavity 25. The length of the two enlarged portions 42 matches the wall thickness of the inner and

outer walls

21 and 23 respectively, and the length of the flat portion 44 matches the thickness of the cavity 25. The wall thickness of the inner layer wall 21 and the outer layer wall 23 is 10-15mm, and the thickness of the cavity 25 is 20mm.

In an embodiment of the present invention, the cartridge wall 22 of the anti-foaming cartridge 20 including the inner wall 21 and the outer wall 23 and provided with the plurality of channels 40 may be an integrally formed structure. In other embodiments, the cylinder wall 22 including the inner layer wall 21 and the outer layer wall 23 may be obtained first, then the inner layer wall 21 and the outer layer wall 23 are provided with the matching holes, and then the passages 40 are installed in the corresponding matching holes, so as to obtain the cylinder wall 22 provided with the passages 40.

In some embodiments, the bubble removal apparatus 100 further comprises: and an ultrasonic bar 50 disposed inside the anti-foaming cartridge 20. Whereby the defoaming effect can be further enhanced. The multiple channels 40 are designed to eliminate major, larger bubbles, and the ultrasonic wand 50 may further eliminate smaller bubbles.

In some embodiments, the ultrasonic wand 50 is provided with a jacket layer 52, and the jacket layer 52 is made of polytetrafluoroethylene. The turbidity detecting cylinder 10, the defoaming filter cylinder 20 and the connecting pipe 30 are all made of polytetrafluoroethylene materials. The defoaming device 100 of the present invention can be applied to a harsh liquid environment, for example, a sulfuric acid process titanium dioxide hydrolysis and seed crystal preparation environment, wherein the temperature of the preparation environment is in the range of 70-100 ℃, and the sulfuric acid concentration reaches 20%. By using a polytetrafluoroethylene material, good corrosion resistance of the device 100 can be achieved.

In the prior art, most of defoaming devices and defoaming methods for turbidity online detection aim at wastewater treatment and water quality detection, conditions such as pH, temperature, particle property and concentration of water quality detection are mild, and for a hydrolysis external seed crystal system with the temperature of 70-100 ℃ and the sulfuric acid concentration of 20% on a production line, the problem of bubbles in the preparation process of the hydrolysis external seed crystal cannot be effectively solved for a long time by using common defoaming devices and methods. Especially in devices with a high structural complexity, where the assembly of the components results in a high number of liquid entry dead corners and gaps, it is difficult to achieve a sufficiently complete protection.

In some embodiments, the bottom wall 12 of the turbidity detecting cylinder 10 is disposed obliquely such that the first side 11 of the bottom wall 12 is lower than the second side 13, an opening 15 is provided at the junction of the side wall 14 of the turbidity detecting cylinder 10 and the first side 11 of the bottom wall 12, and the connecting pipe 30 is connected to the opening 15; the connecting conduit 30 includes a first end 32 connected to the turbidity detecting cylinder 10 and a second end 34 connected to the antifoam filter cartridge 20, the first end 32 being no lower than the second end 34. The radial dimension of the opening 15 may be 20mm.

By such a design, it is advantageous to guide the liquid in the turbidity detecting cylinder 10 to flow back to the anti-foaming filter cartridge 20 via the connection pipe 30, and then to flow to the outside of the anti-foaming filter cartridge 20 via the plurality of channels 40. In the preparation process of the sulfuric acid method titanium dioxide hydrolysis external crystal seeds, after the preparation of the external crystal seeds is completed, the crystal seeds in the crystal seed preparation tank (including the crystal seeds in the turbidity detection cylinder 10 and the defoaming filter cylinder 20) need to be discharged. The first side 11 of the bottom wall 12 is inclined downwardly so that the liquid in the turbidity detecting cartridge 10 can be guided to the junction of the first side 11 and the side wall 14 (i.e. the lowest part of the bottom of the turbidity detecting cartridge 10) and enter the connecting channel 30 through the opening 15 of the junction, thereby ensuring that the liquid in the turbidity detecting cartridge 10 is completely drained. The first end 32 of the connecting conduit 30 is not lower than the second end 34 so that liquid flows more easily from the first end 32 to the second end 34 into the antifoam cartridge 20. The liquid in the antifoam cartridge 20 flows via a plurality of channels 40 to a seed preparation tank in which the antifoam cartridge 20 is placed, and then is discharged out of the seed preparation tank.

In some embodiments, the connecting conduit 30 is disposed at an incline such that the first end 32 is higher than the second end 34, and the inclination of the connecting conduit 30 corresponds to the inclination of the bottom wall 12 of the turbidity detecting cartridge 10. Therefore, the bottom wall 12 of the turbidity detecting cylinder 10 and the connecting pipeline 30 can be approximately on the same straight line, so that the liquid can smoothly and stably flow from the turbidity detecting cylinder 10 to the defoaming filter cylinder 20 along the straight line, no flowing dead angle exists, and the liquid is completely discharged.

In the embodiment of the present invention, the bottom wall 12 of the turbidity detecting cylinder 10 is inclined at an angle of 10 ° with respect to the horizontal plane. The sidewall 14 of the turbidity detecting cartridge 10 can be vertically disposed. Accordingly, the angle between the side wall 14 connected to the first side 11 of the bottom wall 12 and the bottom wall 12 is 80 °, and the angle between the side wall 14 connected to the second side 13 of the bottom wall 12 and the bottom wall 12 is 100 °. The bottom wall of the antifoam cartridge 20 may be horizontally disposed.

By setting the inclination angle to 10 deg., on the one hand, the liquid can be guided to flow and, on the other hand, the capacity requirements of the turbidity detecting cartridge 10 can be easily met. It can be understood that the larger the inclination angle of the bottom wall 12, the smaller the capacity of the turbidity detecting cartridge 10 will be.

According to the above description, the defoaming device 100 for the turbidity detection process of the present invention can successfully eliminate the bubbles generated in the hydrolysis plus seed crystal quality online detection process, solve the noise problem of the detection data, successfully realize the real-time performance, effectiveness, accuracy and long-term stability of data acquisition in the sulfuric acid method titanium dioxide hydrolysis plus seed crystal quality online determination process, and simultaneously, no other impurities are introduced to avoid the pollution of the plus seed crystal. The device has the advantages of simple and convenient processing, convenient operation, low cost, easy realization and long-term stable operation.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.

Claims

1. A defoaming apparatus for turbidity detection processes, comprising:

a turbidity detection cartridge, wherein a turbidity sensor is located within the turbidity detection cartridge when the bubble removal apparatus is in use;

the defoaming filter cylinder is communicated with the turbidity detection cylinder through the connecting pipeline, a plurality of channels penetrating through the cylinder wall are arranged on the cylinder wall of the defoaming filter cylinder, each channel comprises an expanding part positioned at two ends and a straight part positioned in the middle, and the radial dimension of the expanding part is gradually reduced along the direction close to the straight part.

2. The apparatus of claim 1, wherein the wall of the anti-foaming cartridge comprises: the inner wall and the outer wall form a cavity, and the channel penetrates through the inner wall, the cavity and the outer wall.

3. The apparatus of claim 2, wherein the wall of the defoamer cartridge is an integral structure.

4. The apparatus of claim 1, further comprising: an ultrasonic bar disposed within the anti-foaming filter cartridge.

5. The device of claim 4, wherein the ultrasonic rod is externally provided with a jacket layer, and the jacket layer is made of polytetrafluoroethylene material.

6. The apparatus of claim 1, wherein the turbidity sensing cartridge, the anti-foaming cartridge, and the connecting conduit are all made of polytetrafluoroethylene material.

7. The apparatus of claim 1, wherein the enlarged portion has a maximum radial dimension of 7mm; the radial dimension of the straight portion is 4mm; the length of straight portion is 20mm.

8. The apparatus according to claim 1, wherein the bottom wall of the turbidity detecting cylinder is disposed obliquely so that the first side of the bottom wall is lower than the second side, an opening is provided at a junction of the side wall of the turbidity detecting cylinder and the first side of the bottom wall, and the connecting pipe is connected to the opening;

the connecting pipeline comprises a first end connected with the turbidity detecting cylinder and a second end connected with the defoaming filter cylinder, and the first end is not lower than the second end.

9. The device according to claim 8, characterized in that said connecting duct is arranged inclined so that said first end is higher than said second end, the inclination of said connecting channel being in correspondence with the inclination of the bottom wall of said turbidity detecting cartridge.

10. The apparatus of claim 8, wherein the bottom wall of the turbidity sensing cylinder is inclined at an angle of 10 ° relative to horizontal.