A defoamer for detecting the level of a liquid under a foam containing solid particles and gas bubbles

Abstract

This invention discloses a defoamer for detecting liquid level under foam in liquids containing solid particles and bubbles, comprising a particle discharge pipe, a bubble guide pipe, a bubble collecting cone, a bubble discharge pipe, a liquid guide pipe, and a liquid level testing chamber. Except for the bubble discharge pipe, all other structures are coaxially arranged with their axes perpendicular to the horizontal plane. The defoamer for detecting liquid level under foam is placed in the liquid containing solid particles and bubbles. The lower end of the particle discharge pipe is connected to the liquid containing solid particles and bubbles, and the upper end of the particle discharge pipe is connected to the bubble guide pipe. The bubble guide pipe is formed by connecting two conical tubes with the same small ends at their small ends. One large end of the bubble guide pipe is connected to the upper end of the particle discharge pipe, and the other large end of the bubble guide pipe is connected to the bottom of the liquid guide pipe.

Description

Technical Field

[0001] This invention relates to the field of liquid level detection and control, and in particular to a defoamer for detecting liquid levels under foam containing solid particles and bubbles. Background Technology

[0002] Liquid level detection is a frequently used measurement tool in industrial production, and the liquid level value is a commonly used parameter in industrial control processes. Currently, commonly used liquid level detection devices both domestically and internationally are mainly divided into contact and non-contact types.

[0003] Non-contact flow meters mainly consist of ultrasonic level gauges or radar level gauges. Ultrasonic flow meters use ultrasonic waves with excessively large reflection angles, and the foam layer caused by changes in the liquid level can affect the sound wave radiation, compromising measurement accuracy. Radar level gauges only detect the physical surface position and lack penetrating power, making them ineffective for level detection in environments containing foam.

[0004] Contact-type liquid level detection devices mainly consist of submersible or pressure-type liquid level gauges. The disadvantage of submersible liquid level gauges is that they need to be customized according to the specific height; the disadvantage of pressure-type liquid level gauges is that in liquids containing particulate media, the probe often gets clogged, and it is greatly affected by the particle concentration, resulting in distorted liquid level detection and a large amount of maintenance and cleaning required.

[0005] Therefore, we propose an antifoaming device for detecting liquid level under foam in liquids containing solid particles and bubbles. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, the present invention provides an antifoamer for detecting liquid level in liquids containing solid particles and bubbles. By setting a simple structure, it can eliminate foam in the liquid during level testing and increase the accuracy of level testing.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a defoamer for detecting liquid level under foam in liquid containing solid particles and bubbles, comprising a particle discharge pipe, a bubble guide pipe, a bubble collecting cone, a bubble discharge pipe, a liquid guide pipe and a liquid level test chamber. Except for the bubble discharge pipe, all other structures are coaxially arranged and the axis is perpendicular to the horizontal plane. The defoamer for detecting liquid level under foam is placed in the liquid containing solid particles and bubbles.

[0008] In a preferred embodiment of the present invention, the lower end of the particle discharge pipe is connected to a liquid containing solid particles and bubbles, and the upper end of the particle discharge pipe is connected to a bubble guide pipe.

[0009] As a preferred embodiment of the present invention, the bubble guide tube is formed by connecting two tapered tubes with the same small ends at their small ends. One large end of the bubble guide tube is connected to the upper end of the discharge tube particles, and the other large end of the bubble guide tube is connected to the bottom of the liquid guide tube.

[0010] As a preferred embodiment of the present invention, the bubble collecting cone is located above the bubble guide tube, and the upper end of the bubble collecting cone is connected to and passes through the liquid guide tube via the bubble discharge tube.

[0011] As a preferred embodiment of the present invention, the upper opening of the bubble discharge pipe is connected to the liquid containing solid particles and bubbles, and the end face of the upper opening of the bubble discharge pipe is perpendicular to the horizontal plane.

[0012] As a preferred embodiment of the present invention, the lower end of the liquid guide tube is connected to and communicates with the bubble guide tube, the middle part of the liquid guide tube is connected to the bubble discharge tube, and the upper end of the liquid guide tube is connected to and communicates with the liquid level test chamber.

[0013] As a preferred embodiment of the present invention, the liquid level test chamber is composed of a tapered tube section (smaller at the bottom and larger at the top) connected to a straight tube section.

[0014] As a preferred embodiment of the present invention, the inner diameters of the particle discharge pipe (D1), the minimum inner diameter of the bubble guide pipe (D2), the maximum inner diameter of the bubble collecting cone (D3), the inner diameter of the liquid guide pipe (D5), and the inner diameter of the upper end of the liquid level test chamber (D6) are related as follows: D6 > D5 = D1 > D3 > D2.

[0015] As a preferred embodiment of the present invention, the cross-sections of the particle discharge pipe, bubble guide pipe, bubble collection cone, liquid guide pipe, and liquid level test chamber perpendicular to their axes are not limited to circles, and the inner diameters of the above structures are not limited to the actual inner diameters, but can be the diameters of circles with areas equal to the area enclosed by the inner wall cross-sections at each location.

[0016] Compared with the prior art, the beneficial effects that this invention can achieve are:

[0017] 1. Bubbles rise in the particle discharge tube and are discharged into the liquid through the particle discharge tube, bubble guide tube, bubble collection cone, and bubble discharge tube, eliminating the foam layer in the liquid level test chamber. The liquid in the particle discharge tube passes through the gap between the particle discharge tube, bubble guide tube, bubble collection cone, and liquid guide tube, and finally reaches the liquid level test chamber through the liquid guide tube. The obstruction and consumption in the whole process reduce the fluctuation amplitude. Then, the area of ​​the liquid level test chamber is enlarged, which reduces the fluctuation amplitude proportionally again. Thus, the defoamer eliminates the impact of instantaneous large fluctuations in liquid level under foam on the measurement stability.

[0018] 2. The present invention has a simple structure and is easy to use. By setting a simple structure, it can eliminate foam in the liquid during liquid level testing and increase the accuracy of liquid level testing. Attached Figure Description

[0019] Figure 1A schematic diagram of a defoamer for detecting liquid level under foam in liquids containing solid particles and air bubbles;

[0020] The components include: 1. Particle discharge pipe; 2. Bubble guide pipe; 3. Bubble collection cone; 4. Bubble discharge pipe; 5. Liquid guide pipe; 6. Liquid level test chamber. Detailed Implementation

[0021] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0022] Example:

[0023] like Figure 1 As shown, the present invention provides a defoamer for detecting liquid level under foam in liquids containing solid particles and bubbles, including a particle discharge pipe 1, a bubble guide pipe 2, a bubble collecting cone 3, a bubble discharge pipe 4, a liquid guide pipe 5, and a liquid level testing chamber 6. Except for the bubble discharge pipe 4, all other structures are coaxially arranged, and the axis is perpendicular to the horizontal plane. The defoamer for detecting liquid level under foam is placed in the liquid containing solid particles and bubbles. The defoamer for detecting liquid level under foam can be installed inside or outside the device containing the liquid containing solid particles and bubbles. The corresponding particle discharge pipe 1 is a straight pipe or an inclined pipe.

[0024] In this embodiment, the lower part of the particle discharge pipe 1 is provided with a liquid containing solid particles and bubbles, the lower end of the particle discharge pipe 1 is connected to the liquid containing solid particles and bubbles, and the upper end of the particle discharge pipe 1 is connected to the bubble guide pipe 2.

[0025] In this embodiment, the bubble guide tube 2 is formed by connecting two tapered tubes with the same small end at the small end. One large end of the bubble guide tube 2 is connected to the upper end of the discharge tube particle 1, and the other large end of the bubble guide tube 2 is connected to the bottom of the liquid guide tube 5.

[0026] In this embodiment, the bubble collecting cone 3 is located above the bubble guide tube 2, and the upper end of the bubble collecting cone 3 is connected to and passes through the liquid guide tube 5 via the bubble discharge tube 4.

[0027] In this embodiment, the upper opening of the bubble discharge pipe 4 is connected to the liquid containing solid particles and bubbles, and the end face of the upper opening of the bubble discharge pipe 4 is perpendicular to the horizontal plane; this ensures that solid particles in the liquid directly above the outlet of the bubble discharge pipe 4 will not enter the bubble discharge pipe 4, and the bubbles in the bubble discharge pipe 4 move upward along the upper wall of the pipe, while the solid particles move downward along the lower wall of the pipe.

[0028] In this embodiment, the lower end of the liquid guide pipe 5 is connected to and communicates with the bubble guide pipe 2, the middle part of the liquid guide pipe 5 is connected to the bubble discharge pipe 4, and the upper end of the liquid guide pipe 5 is connected to and communicates with the liquid level test chamber 6.

[0029] In this embodiment, the liquid level test chamber 6 is composed of a tapered tube section (smaller at the bottom and larger at the top) connected to a straight tube section. The tapered tube section ensures that no solid particles are deposited inside the liquid level test chamber.

[0030] In this embodiment, the inner diameters of the particle discharge pipe 1 (D1), the minimum inner diameter of the bubble guide pipe 2 (D2), the maximum inner diameter of the bubble collecting cone 3 (D3), the inner diameter of the liquid guide pipe 5 (D5), and the inner diameter of the upper end of the liquid level test chamber 6 (D6) are related as follows: D6 > D5 = D1 > D3 > D2. The minimum inner diameter of the bubble guide pipe (D2) is smaller than the bottom inner diameter of the bubble collecting cone (D3), ensuring that the bubbles rising approximately vertically through the guide pipe are collected in the bubble collecting cone.

[0031] In this embodiment, the cross-sections of the particle discharge pipe 1, the bubble guide pipe 2, the bubble collecting cone 3, the liquid guide pipe 5, and the liquid level test box 6 perpendicular to their axes are not limited to circles, and the inner diameters of the above structures are not limited to the actual inner diameters, but can be the diameters of circles with the area enclosed by the inner wall cross-sections at each location.

[0032] When this defoamer is in use, the liquid containing solid particles and bubbles on the outside of the defoamer is connected to the inside of the defoamer through the particle discharge pipe 1 and the bubble discharge pipe 4. The bubbles in the particle discharge pipe 1 rise and are discharged into the liquid through the particle discharge pipe 1, the bubble guide pipe 2, the bubble collecting cone 3, and the bubble discharge pipe 4, eliminating the foam layer in the liquid level test chamber 6. The liquid in the particle discharge pipe passes through the gap between the particle discharge pipe 1, the bubble guide pipe 2, the bubble collecting cone 3 and the liquid guide pipe 5, and finally reaches the liquid level test chamber 6 through the liquid guide pipe 5. The obstruction and consumption in the whole process reduce the fluctuation amplitude. Then, the area of ​​the liquid level test chamber is enlarged, so the fluctuation amplitude is reduced proportionally again. Thus, the defoamer can eliminate the influence of instantaneous large fluctuations in the liquid level under foam on the measurement stability.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A defoaming device for detecting the level of a liquid under a foam containing solid particles and gas bubbles, characterized by: The device comprises a particle discharge pipe (1), a bubble guide pipe (2), a bubble collection cone (3), a bubble discharge pipe (4), a liquid guide pipe (5) and a liquid level test box (6), wherein all the pipes are coaxial and the axis is perpendicular to the horizontal plane, and the bubble discharge pipe (4) is placed in the liquid containing solid particles and bubbles. The lower end of the particle discharge pipe (1) is connected with the liquid containing solid particles and bubbles, and the upper end of the particle discharge pipe (1) is connected with the bubble guide pipe (2). The bubble guide pipe (2) is formed by connecting two conical pipes with the same small end, one large end of the bubble guide pipe (2) is connected with the upper end of the particle discharge pipe (1), and the other large end of the bubble guide pipe (2) is connected with the bottom of the liquid guide pipe (5). The bubble collection cone (3) is located above the bubble guide pipe (2), and the upper end of the bubble collection cone (3) is connected to the liquid guide pipe (5) through the bubble discharge pipe (4). The upper end of the bubble discharge pipe (4) is connected with the liquid containing solid particles and bubbles, and the end surface of the upper end of the bubble discharge pipe (4) is perpendicular to the horizontal plane. The lower end of the liquid guide pipe (5) is connected with the bubble guide pipe (2), the middle part of the liquid guide pipe (5) is connected with the bubble discharge pipe (4), and the upper end of the liquid guide pipe (5) is connected with the liquid level test box (6). The liquid level test box (6) is formed by connecting a conical pipe segment with a small lower end and a large upper end and a straight pipe segment.

2. A defoaming device for detecting a liquid level of a foam of a liquid containing solid particles and bubbles according to claim 1, characterized by: The inner diameter D1 of the particle discharge pipe (1), the minimum inner diameter D2 of the bubble guide pipe (2), the maximum inner diameter D3 of the bubble collection cone (3), the inner diameter D5 of the liquid guide pipe (5) and the inner diameter D6 of the upper end of the liquid level test box (6) satisfy the following relationship: D6>D5=D1>D3>D2.

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