A liquid level gauge anti-crystallization and clogging device

Abstract

This utility model relates to the field of level gauge detection, specifically to a level gauge anti-crystallization and clogging device, comprising: a capillary tube; a pressure transmitter, with a capillary tube connected to each end of the pressure transmitter; a positive pressure chamber diaphragm and a negative pressure chamber diaphragm, the positive and negative pressure chamber diaphragms being connected to the capillary tubes on both sides of the pressure transmitter; a reducing pipe, one end of which is connected to an evaporation tank, and the other end connected to the positive and negative pressure chamber diaphragms; and a steam purging pipe, the reducing pipe having an opening serving as a steam purging port, one end of which is connected to the reducing pipe through the steam purging port, and the other end being connected to a steam pipeline. This utility model provides a level gauge anti-crystallization and clogging device, ensuring that the measured medium, which is prone to crystallization or deposition and clogging, does not affect the normal use of the measuring instrument, thereby extending the service life of the level gauge. It can meet the requirements of various dual-flange level detection systems prone to crystallization and clogging.

Description

Technical Field

[0001] This utility model relates to the field of liquid level gauge detection, and specifically to a liquid level gauge anti-crystallization and anti-clogging device. Background Technology

[0002] In the wastewater treatment process of chemical enterprises, the evaporation and concentration process is a crucial link. Its core objective is to remove water from wastewater through heating and evaporation, thereby reducing the amount of wastewater and concentrating and recovering useful substances, which in turn reduces subsequent treatment costs and improves resource utilization.

[0003] The evaporation chamber operates in a unique environment of negative pressure and high temperature. The negative pressure helps lower the boiling point of wastewater, allowing water to evaporate at a relatively low temperature and reducing energy consumption; the high temperature accelerates water evaporation and decomposes some impurities, improving evaporation efficiency. However, this unique environment also presents numerous challenges to equipment operation and liquid level measurement.

[0004] Wastewater from chemical plants has a complex composition, containing a large number of different types of impurities. During the evaporation and concentration process, as water evaporates, the concentration of these impurities gradually increases, easily reaching a supersaturated state and crystallizing out. At the same time, some impurities may also deposit in the evaporation chamber due to their physical properties.

[0005] As a crucial device for acquiring liquid level information in the evaporation chamber, the accuracy of the liquid level detection device directly affects the stable operation of the entire evaporation and concentration process. Currently, due to the negative pressure and high temperature characteristics of the evaporation chamber and the tendency of the wastewater medium to crystallize due to its high impurity content, crystallization and sediment accumulation gradually cause siltation, eventually leading to blockage of the connecting pipe between the positive and negative pressure chambers. Once the connecting pipe is blocked, pressure changes cannot be accurately detected, causing deviations in the liquid level gauge readings. This severely affects the normal use of liquid level measurement, adversely impacting the entire evaporation and concentration process and even the entire wastewater treatment procedure. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model proposes a liquid level gauge anti-crystallization and anti-clogging device, which has a simple structure and strong practicality.

[0007] This utility model provides a liquid level gauge anti-crystallization and anti-clogging device, comprising: Capillary; A pressure transmitter, wherein a capillary tube is connected to each of the two ends of the pressure transmitter; A positive pressure chamber diaphragm and a negative pressure chamber diaphragm, wherein the positive pressure chamber diaphragm and the negative pressure chamber diaphragm are connected to capillaries on both sides of the pressure transmitter; A variable diameter connecting pipe, one end of which is connected to the evaporation chamber tank, and the other end of which is connected to the diaphragm of the positive pressure chamber and the diaphragm of the negative pressure chamber; A steam purging pipe is provided, with an opening on the reducing connecting pipe serving as a steam purging port. One end of the steam purging pipe is connected to the reducing connecting pipe through the steam purging port, and the other end is connected to the steam pipeline.

[0008] In some embodiments, the positive pressure chamber diaphragm is located above the negative pressure chamber diaphragm.

[0009] In some embodiments, there are two variable-diameter connecting pipes, which are respectively connected to the diaphragm of the positive pressure chamber and the diaphragm of the negative pressure chamber.

[0010] In some embodiments, the variable-diameter connecting pipe is inclined at 45 degrees on the evaporation chamber wall.

[0011] In some embodiments, the cross-section of the variable-diameter connecting pipe is trapezoidal, and the diameters of the ports are 100mm and 200mm, respectively.

[0012] In some embodiments, the 200mm diameter port of the variable-diameter connecting pipe is connected to the evaporation chamber tank, and the 100mm diameter port is connected to the diaphragm of the positive pressure chamber and the diaphragm of the negative pressure chamber. In some embodiments, the pressure transmitter is used for dual-flange level detection.

[0013] In some embodiments, the diameter of the steam purging pipe is 20 mm.

[0014] In some embodiments, the positive pressure chamber diaphragm and the negative pressure chamber diaphragm are mounted on a flange.

[0015] In some embodiments, the variable-diameter connecting pipe connects the positive pressure chamber diaphragm and the negative pressure chamber diaphragm via a flange.

[0016] The beneficial effects of this utility model are as follows: This utility model includes a capillary tube; a pressure transmitter, with a capillary tube connected to each end of the pressure transmitter; a positive pressure chamber diaphragm and a negative pressure chamber diaphragm, the positive pressure chamber diaphragm and the negative pressure chamber diaphragm being connected to the capillary tubes on both sides of the pressure transmitter; a variable diameter connecting pipe, one end of which is connected to the evaporation tank, and the other end of which is connected to the positive pressure chamber diaphragm and the negative pressure chamber diaphragm; and a steam purging pipe, the variable diameter connecting pipe having an opening as a steam purging port, one end of which is connected to the variable diameter connecting pipe through the steam purging port, and the other end of which is connected to a steam pipeline.

[0017] This invention provides a device to prevent crystallization and clogging in level gauges, ensuring that easily crystallized or deposited media do not affect the normal operation of the measuring instrument, thereby extending the service life of the level gauge. This invention overcomes the deficiencies in the prior art, featuring a reasonable structure, safety, and reliability. It can meet the requirements of various easily crystallizing and clogging double-flange or single-flange level detection applications, ensuring relatively accurate measurements. It represents an improvement and innovation in level detection under specific environments. This invention also controls and stabilizes safety issues in chemical production processes to a certain extent, reducing unsafe factors present during production. Attached Figure Description

[0018] To better understand this invention, reference can be made to the embodiments shown in the following figures. Components in the figures are not necessarily drawn to scale, and related elements may be omitted, or in some cases the scale may have been enlarged to emphasize and clearly illustrate the novel features described herein. Additionally, as is known in the art, system components may be arranged differently. Furthermore, in the figures, the same reference numerals denote corresponding parts throughout several views.

[0019] Figure 1 A reference schematic diagram of a liquid level gauge anti-crystallization and clogging device according to the present invention is shown; Figure 2 A prior art reference schematic diagram of a liquid level gauge anti-crystallization and clogging device according to the present invention is shown; Explanation of reference numerals in the attached diagram: 1. Capillary tube; 2. Pressure transmitter; 3. Positive pressure chamber diaphragm; 4. Negative pressure chamber diaphragm; 5. Variable diameter connecting pipe; 6. Steam purging pipe. Detailed Implementation

[0020] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in this invention, those skilled in the art will readily recognize that various modifications are possible without substantially departing from the teachings of the present invention. Accordingly, all such modifications should be included within the scope of this invention. Other substitutions, modifications, variations, and deletions can be made to the design, operating conditions, and parameters of the following exemplary embodiments without departing from the spirit of the present invention.

[0021] like Figure 1 and Figure 2 As shown, this utility model provides a liquid level gauge anti-crystallization and anti-clogging device, comprising: Capillary 1; Pressure transmitter 2, with a capillary tube 1 connected to each end of the pressure transmitter 2; Positive pressure chamber diaphragm 3 and negative pressure chamber diaphragm 4 are connected to capillary tubes 1 on both sides of the pressure transmitter 2. A variable diameter connecting pipe 5, one end of which is connected to the evaporation chamber tank, and the other end of which is connected to the positive pressure chamber diaphragm 3 and the negative pressure chamber diaphragm 4; The steam purging pipe 6 has an opening on the variable diameter connecting pipe 5 as a steam purging port. One end of the steam purging pipe 6 is connected to the variable diameter connecting pipe 5 through the steam purging port, and the other end is connected to the steam pipeline.

[0022] Existing dual-flange level gauge installation and testing methods, such as Figure 2 As shown, the system mainly consists of a connecting pipe 5 and flange welded to the wall of the evaporation tank, a positive pressure chamber diaphragm 3 and a negative pressure chamber diaphragm 4 of the double-flange level gauge, a capillary tube 1 for remote pressure transmission, and a transmitter 2. The positive pressure chamber diaphragm 3 and the negative pressure chamber diaphragm 4 are fixed to the flange of the reducing connecting pipe 5 on the tank wall via their own flanges. When measuring the medium in the evaporation chamber, due to changes in the production process, some of the measured medium easily crystallizes or deposits in the cavity of the reducing connecting pipe 5, gradually accumulating and causing blockage. This blockage leads to the reducing connecting pipe 5 of the positive and negative pressure chambers becoming obstructed, preventing the positive pressure chamber diaphragm 3 and the negative pressure chamber diaphragm 4 from sensing pressure changes, thus affecting the normal operation of the level measurement.

[0023] This utility model is as follows Figure 2 As shown, it includes a pressure transmitter 2 and a positive pressure chamber diaphragm 3 and a negative pressure chamber diaphragm 4 connected by a capillary tube 1, a reducing diameter connecting pipe 5 and a flange on the evaporation chamber tank wall, and a steam purge port on the reducing diameter connecting pipe 5.

[0024] The dual-flange liquid level detection instrument consists of a positive pressure chamber diaphragm 3 and a negative pressure chamber diaphragm 4 that meet the requirements of the measured medium, a capillary tube 1 that transmits pressure changes, and a pressure transmitter 2. Under normal conditions, the positive pressure chamber diaphragm 3 and the negative pressure chamber diaphragm 4 sense the pressure changes in the evaporation chamber.

[0025] After the variable diameter connecting pipe 5 is welded to the tank wall, holes are made and welded to the upper part of the DN100 port of the variable diameter connecting pipe 5 in the positive and negative pressure chambers respectively. The steam purging pipe 6 is connected to the steam pipeline to form a steam purging device.

[0026] like Figure 1 As shown, in some embodiments, the positive pressure chamber diaphragm 3 is located above the negative pressure chamber diaphragm 4.

[0027] like Figure 1 As shown, in some embodiments, there are two variable-diameter connecting pipes 5, which are respectively connected to the positive pressure chamber diaphragm 3 and the negative pressure chamber diaphragm 4.

[0028] The diameters at both ends of the variable-diameter connecting pipe 5 are not uniform, but optimized according to the flow characteristics and crystallization rules of the medium. The inlet section near the evaporation chamber wall has a relatively large diameter, providing a more spacious flow channel for the medium. When wastewater containing a large amount of impurities and prone to crystallization flows from the evaporation chamber into the connecting pipe, the larger diameter reduces the flow velocity of the medium, decreasing friction and collision between the medium and the pipe wall, thereby reducing the possibility of impurities adhering to and crystallizing on the pipe wall. Simultaneously, the spacious channel allows larger particles of impurities in the medium to pass smoothly, preventing them from accumulating and clogging at the inlet.

[0029] As the medium flows forward within the connecting pipe, the pipe diameter gradually decreases, creating a gradual change in pressure and flow velocity. As the pipe diameter decreases, the flow velocity gradually increases, and the pressure rises. The increased flow velocity enhances the scouring effect of the medium on the pipe wall, promptly washing away any tiny impurities that may adhere to the wall and preventing their gradual accumulation and crystallization. The increased pressure, on the other hand, helps to inhibit the formation of impurity crystals.

[0030] like Figure 1 As shown, in some embodiments, the variable diameter connecting pipe 5 is inclined at 45 degrees on the evaporation chamber wall.

[0031] The steam purging pipe device of the variable diameter connecting pipe 5 is calculated at a certain angle so that the steam it blows out is at an angle to purge the crystallized material accumulated below the variable diameter connecting pipe 5, ensuring that the variable diameter connecting pipe 5 does not crystallize or become blocked, thereby ensuring that the diaphragm of the double flange can detect pressure normally.

[0032] When wastewater containing a large amount of impurities flows from the evaporation chamber into the inclined reducing pipe, gravity no longer acts vertically downwards during the flow. Instead, it is decomposed into two components: one along the pipe wall and one perpendicular to the pipe wall. The component along the pipe wall causes the medium to flow faster along the inclined pipe wall, continuously flushing away any impurities that may adhere to the pipe wall, preventing them from accumulating and crystallizing. Simultaneously, the component perpendicular to the pipe wall reduces the adhesion of the medium to the pipe wall, further decreasing the likelihood of crystallization.

[0033] like Figure 1 As shown, in some embodiments, the cross-section of the variable diameter connecting pipe 5 is trapezoidal, and the diameters of the ports are 100mm and 200mm, respectively.

[0034] The aforementioned reducing connecting pipe 5 for dual-flange liquid level detection is a modified pipe with a DN100 diameter originally installed horizontally, reduced to a DN200 port at one end and a DN100 port at the other. The modified pipe with the DN200 port is then welded upwards at a 45-degree angle to the wall of the evaporation chamber. The flange at the other end, the DN100 port, is connected to the diaphragm 3 of the positive pressure chamber and the diaphragm 4 of the negative pressure chamber. The reduced diameter and 45-degree upward angle of the reducing connecting pipe 5 prevents the detection medium from accumulating inside. The flange at the DN100 end of the reducing connecting pipe 5 is of the same standard as the diaphragm flange of the dual-flange liquid level detection instrument, ensuring that the two are the same size. The material of the reducing connecting pipe 5 is suitable for the temperature and corrosiveness requirements of the measured medium.

[0035] The port of the variable diameter connecting pipe 5 near the tank wall is twice the size of the pressure detection port and is installed at an angle. The medium cannot crystallize and accumulate normally in the cavity of the variable diameter connecting pipe 5. A small portion of the medium crystals are melted and detached by steam purging, thus completing the protection of the normal operation of the liquid level detection instrument.

[0036] The steam purging protection device installed on the reducing connecting pipe 5 does not need to be remanufactured due to the replacement of the liquid level detection instrument, and can work efficiently for a long time.

[0037] like Figure 1 As shown, in some embodiments, the 200mm diameter port of the variable diameter connecting pipe 5 is connected to the evaporation chamber tank, and the 100mm diameter port is connected to the positive pressure chamber diaphragm 3 and the negative pressure chamber diaphragm 4.

[0038] A 200mm diameter port is connected to the evaporation chamber tank. The wastewater medium inside the evaporation chamber has a complex composition, containing a large number of impurity particles of different sizes. When this medium flows from the evaporation chamber into the connecting pipe, the wide 200mm diameter inlet provides ample flow space for the medium. The larger pipe diameter effectively reduces the flow velocity of the medium, reducing the intense friction and collision between the medium and the pipe wall. Under high-speed flow and with numerous impurities, frequent collisions between the medium and the pipe wall can easily break the impurities into smaller particles, accelerating crystallization. Reducing the flow velocity not only reduces the possibility of impurity breakage but also allows larger particles in the medium to pass through smoothly, preventing them from accumulating and clogging at the inlet. As the medium flows forward in the connecting pipe, the pipe diameter gradually changes, eventually connecting to a 100mm diameter port, which is connected to the positive pressure chamber diaphragm 3 and the negative pressure chamber diaphragm 4. During the medium flow, the narrowing of the pipe diameter gradually increases the flow velocity of the medium. The increased flow velocity enhances the scouring effect of the medium on the pipe wall, promptly flushing away any tiny impurities that may adhere to the pipe wall, preventing them from gradually accumulating and forming crystals. This ensures that the diaphragm can accurately sense pressure changes, thereby providing precise measurement data for the level gauge.

[0039] In some embodiments, the pressure transmitter 2 is used for dual-flange liquid level detection.

[0040] In some embodiments, the diameter of the steam purging pipe 6 is 20 mm.

[0041] like Figure 1 As shown, in some embodiments, the positive pressure chamber diaphragm 3 and the negative pressure chamber diaphragm 4 are mounted on a flange.

[0042] In some embodiments, the variable diameter connecting pipe 5 connects the positive pressure chamber diaphragm 3 and the negative pressure chamber diaphragm 4 via a flange.

[0043] Flange connections offer excellent sealing performance, effectively preventing media leakage and avoiding measurement errors and environmental pollution caused by leaks. Simultaneously, the stable connection ensures that the connecting pipe and diaphragm will not loosen due to vibration or pressure changes during long-term operation, further guaranteeing the reliability of level measurement.

[0044] The above embodiments are possible examples of implementations of this utility model, and are provided only to enable those skilled in the art to clearly understand the principles of this utility model. Those skilled in the art should understand that the above discussion of any embodiment is merely exemplary and is not intended to imply that the scope of the disclosed embodiments of this utility model includes claims limited to these examples. Under the overall concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined with each other, resulting in many other variations of different aspects of the embodiments of this utility model as described above. For the sake of brevity, these variations are not provided in the specific embodiments. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this utility model should be included within the protection scope claimed by this utility model.

Claims

1. A liquid level gauge anti-crystallization blocking device applied to an evaporation chamber tank, characterized in that, include: Capillary (1); Pressure transmitter (2), with a capillary tube (1) connected to each end of the pressure transmitter (2); Positive pressure chamber diaphragm (3) and negative pressure chamber diaphragm (4), the positive pressure chamber diaphragm (3) and negative pressure chamber diaphragm (4) are connected to the capillary tubes (1) on both sides of the pressure transmitter (2). A variable diameter connecting pipe (5) is connected at one end to the evaporation chamber tank and at the other end to the positive pressure chamber diaphragm (3) and the negative pressure chamber diaphragm (4). Steam purge pipe (6), the opening on the variable diameter connecting pipe (5) serves as a steam purge port, one end of the steam purge pipe (6) is connected to the variable diameter connecting pipe (5) through the steam purge port, and the other end is connected to the steam pipeline.

2. The level gauge anti-crystallization and anti-clogging device according to claim 1, characterized in that, The positive pressure chamber diaphragm (3) is located above the negative pressure chamber diaphragm (4).

3. The level gauge anti-crystallization and anti-clogging device according to claim 1, characterized in that, There are two variable diameter connecting pipes (5), which are respectively connected to the positive pressure chamber diaphragm (3) and the negative pressure chamber diaphragm (4).

4. The anti-crystallization and anti-clogging device for a level gauge according to claim 1, characterized in that, The variable diameter connecting pipe (5) is inclined at 45 degrees on the evaporation chamber wall.

5. The level gauge anti-crystallization and anti-clogging device according to claim 1, characterized in that, The cross-section of the variable diameter connecting pipe (5) is trapezoidal, and the diameters of the ports are 100mm and 200mm respectively.

6. The level gauge anti-crystallization and anti-clogging device according to claim 5, characterized in that, The 200mm diameter port of the variable diameter connecting pipe (5) is connected to the evaporation chamber tank, and the 100mm diameter port is connected to the positive pressure chamber diaphragm (3) and the negative pressure chamber diaphragm (4).

7. The anti-crystallization and anti-clogging device for a level gauge according to claim 1, characterized in that, The pressure transmitter (2) is used for dual-flange liquid level detection.

8. The level gauge anti-crystallization and anti-clogging device according to claim 1, characterized in that, The diameter of the steam purging pipe (6) is 20 mm.

9. The level gauge anti-crystallization and anti-clogging device according to claim 1, characterized in that, The positive pressure chamber diaphragm (3) and the negative pressure chamber diaphragm (4) are mounted on the flange.

10. The level gauge anti-crystallization and anti-clogging device according to claim 9, characterized in that, The variable diameter connecting pipe (5) is connected to the positive pressure chamber diaphragm (3) and the negative pressure chamber diaphragm (4) via a flange.

Images