A high boiler removal column liquid level measuring device

Abstract

The utility model belongs to liquid level measuring equipment technical field provides a kind of high-boiling tower liquid level measuring device, comprising: first liquid level pipe is connected with the low liquid level pipe mouth of high-boiling tower;Second liquid level pipe is connected with the high liquid level pipe mouth of high-boiling tower;Liquid level transmitter has first, second flange membrane box;Wherein, first liquid level pipe and second liquid level pipe are respectively parallel to the direction of far from high-boiling tower and be inclined upward, and wherein part is respectively equipped with the first pressure-taking pipe and the second pressure-taking pipe extending vertically upward;First flange membrane box is connected with first pressure-taking pipe, and second flange membrane box is connected with second pressure-taking pipe.Through the first, second liquid level pipe of upward inclination and the first, second pressure-taking pipe of vertical arrangement, so that solid particles entering their inside can flow back into high-boiling tower under the action of gravity with high-boiling, to reduce the possibility that first, second flange membrane box is blocked due to solid particles caking and condensation at pipe mouth, effectively improve the accuracy of liquid level measurement.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid level measurement equipment, specifically to a liquid level measurement device for a high-boiling-point tower. Background Technology

[0002] A high-boiling-point separation column (or simply high-boiling-point separation column) is a type of distillation column primarily used to separate high-boiling-point components from mixtures. Its working principle involves heating and cooling components with different boiling points to evaporate and condense within the column, thereby achieving separation.

[0003] Currently, the high-boiling-point removal tower uses a dual-flange level gauge to measure the level of high-boiling-point substances inside. However, in actual operation, high-boiling-point substances tend to flow towards the level measurement port and condense, causing the solid particles they contain to agglomerate and block the port, resulting in level measurement deviations. These deviations prevent operators from accurately determining the true level of the high-boiling-point removal tower, affecting the precision of process control. Furthermore, inaccurate level control during the high-boiling-point removal process can cause blockages or leaks in the corresponding heat exchangers, ultimately leading to tower shutdown.

[0004] To ensure the normal operation of the high-boiling-point dewatering tower, periodic open-loop cleaning is required. Although periodic cleaning can ensure the accuracy of the dual-flange level gauge in measuring the high-boiling-point dewatering tower level to a certain extent, the high-boiling-point components, in addition to solid particles, are mostly toxic chlorides, which makes the periodic cleaning process pose a significant safety risk. Furthermore, the current high frequency of cleaning increases maintenance costs and workload. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a liquid level measuring device for a high-boiling-point tower, which solves the problem that existing high-boiling-point substances easily flow to the liquid level measuring pipe opening and condense, causing the solid particles they contain to agglomerate and block the pipe opening, resulting in deviations in liquid level measurement.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A liquid level measuring device for a high-boiling-point deboiling tower, comprising: The first liquid level pipe is connected to the low liquid level port of the high-boiling point removal tower; The second liquid level pipe is connected to the high liquid level port of the deboiling tower; and The level transmitter has a first flange diaphragm and a second flange diaphragm. The first liquid level pipe and the second liquid level pipe are respectively inclined upward in parallel in the direction away from the high boiling point tower, and each of them is provided with a first pressure tapping pipe and a second pressure tapping pipe extending vertically upward; the first flange diaphragm box is connected to the first pressure tapping pipe, and the second flange diaphragm box is connected to the second pressure tapping pipe.

[0007] In one embodiment disclosed in this application, the upward tilt angle of the first liquid level tube and the second liquid level tube is controlled within the range of 10 to 30°.

[0008] In one embodiment disclosed in this application, the first liquid level tube and the second liquid level tube are each tilted upward at an angle of 20°.

[0009] In one embodiment disclosed in this application, a flushing tube for introducing external clean liquid is also included; The flushing pipe is provided with two flushing branch pipes that are respectively connected to the first liquid level pipe and the second liquid level pipe; Each of the aforementioned flushing branch pipes is equipped with a first valve and a second valve sequentially along the flow direction of the clear liquid.

[0010] In one embodiment disclosed in this application, the first valve is a pneumatic valve that is opened once every 4 hours; The second valve is a check valve, and its state is normally open.

[0011] In one embodiment disclosed in this application, the first liquid level pipe, the second liquid level pipe, the first pressure tapping pipe, the second pressure tapping pipe and the flushing branch pipe are all wrapped with the same electric heating tape, which starts at the low liquid level pipe opening and ends at the high liquid level pipe opening; Temperature sensors electrically connected to the electric heating tape are installed on the first liquid level tube and the second liquid level tube, respectively. The temperature sensors are located downstream of the first flange diaphragm box and the second flange diaphragm box, and are used to monitor the temperature of the high-boiling substance entering the first liquid level tube and the second liquid level tube in real time. When the lower of the two liquid level tubes (first and second) is below the set temperature, the electric heating cable is energized to start heating; otherwise, it is de-energized to stop heating.

[0012] In one embodiment disclosed in this application, the set temperature value is 120°C.

[0013] In one embodiment disclosed in this application, the first liquid level pipe, the second liquid level pipe, the first pressure tapping pipe, the second pressure tapping pipe and the flushing branch pipe are further provided with a heat insulation layer; The insulation layer covers the outside of the electric heating tape.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The first and second liquid level tubes are inclined upwards in parallel, so that the inlets of the first and second pressure taps in the middle are higher than the low liquid level tube inlet and the high liquid level tube inlet, respectively. At the same time, the first and second pressure taps are arranged vertically, so that solid particles entering them can return to the deboiling tower with the flow of high boiling substances under their own gravity. This reduces the possibility of solid particles condensing and clogging the pipe openings at the first and second flange diaphragms, and effectively improves the accuracy of liquid level measurement.

[0015] 2. By periodically opening the first and second valves, external clean liquid is introduced to flush the inside of the first and second level pipes, allowing high-boiling-point substances and solid particles that have entered the first and second level pipes to return to the deboiling tower. This further reduces the possibility of blockage at the pipe openings due to solid particle agglomeration caused by condensation at the first and second flange diaphragm boxes. At the same time, it can reduce the number of open-loop cleaning operations or completely eliminate open-loop cleaning operations, thereby reducing maintenance costs and workload, and reducing or eliminating the safety hazards associated with open-loop cleaning.

[0016] 3. The heating effect of the electric heating tape prevents the high-boiling-point substances entering the first level tube, second level tube, first pressure tapping tube, and second pressure tapping tube from condensing and causing the solid particles they contain to agglomerate and block the pipe openings. This further improves the accuracy of the level transmitter in measuring the liquid level of the high-boiling-point removal tower, further reduces the number of times open-loop cleaning is needed, and helps ensure the safe and stable operation of the high-boiling-point removal tower and the corresponding heat exchanger. At the same time, the interlocking control between the temperature sensor and the electric heating tape can effectively avoid overheating or underheating, ensuring that the internal temperature of the first level tube, second level tube, first pressure tapping tube, and second pressure tapping tube is always at the optimal state, thereby achieving automatic temperature control to reduce power consumption.

[0017] 4. The insulation layer covering the electric heating tape can effectively slow down the rate at which heat is dissipated and conducted to the air, reduce heat loss and power consumption, maintain the stability of the internal temperature of the first liquid level tube, the second liquid level tube, the first pressure tapping tube, and the second pressure tapping tube, and further prevent high-boiling-point substances from condensing and caking. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0024] 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.

[0025] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0026] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] See Figure 1 As shown, this utility model provides a liquid level measuring device for a high-boiling-point dehydration tower, comprising: The first liquid level pipe 10 is connected to the low liquid level port 61 of the high boiling point removal tower 60; The second liquid level pipe 20 is connected to the high liquid level port 62 of the deboiling tower 60; and The level transmitter 30 has a first flange diaphragm box 31 and a second flange diaphragm box 32; The first liquid level pipe 10 and the second liquid level pipe 20 are respectively inclined upward in parallel towards the direction away from the high boiling tower 60, and each of them is provided with a first pressure tapping pipe 11 and a second pressure tapping pipe 21 extending vertically upward; the first flange diaphragm box 31 is connected to the first pressure tapping pipe 11, and the second flange diaphragm box 32 is connected to the second pressure tapping pipe 21.

[0028] The first liquid level pipe 10 and the second liquid level pipe 20 are inclined upwards in parallel, so that the inlets of the first pressure tapping pipe 11 and the second pressure tapping pipe 21 in the middle are higher than the low liquid level port 61 and the high liquid level port 62. At the same time, the first pressure tapping pipe 11 and the second pressure tapping pipe 21 are arranged vertically, so that the solid particles entering them can return to the deboiling tower 60 with the flow of high boiling substances under their own gravity. This reduces the possibility of solid particles condensing and clogging the pipe openings at the first flange diaphragm box 31 and the second flange diaphragm box 32, and effectively improves the accuracy of liquid level measurement.

[0029] The upward tilt angles of the first liquid level pipe 10 and the second liquid level pipe 20 are controlled within the range of 10 to 30°. In this embodiment, the upward tilt angle of the first liquid level pipe 10 and the second liquid level pipe 20 is preferably 20°. This ensures the smooth flow of high-boiling substances without affecting the accuracy of the liquid level measurement in the high-boiling-point removal tower 60.

[0030] The aforementioned high-boiling-point removal tower level measuring device also includes a flushing pipe 40 for introducing external clean liquid. The flushing pipe 40 has two flushing branch pipes 41 connected to the first level pipe 10 and the second level pipe 20 respectively. A first valve 42 and a second valve 43 are installed sequentially on each flushing branch pipe 41 along the flow direction of the clean liquid. In this way, by periodically opening the first valve 42 and the second valve 43, external clean liquid is introduced to flush the inside of the first level pipe 10 and the second level pipe 20, so that the high-boiling-point substances and solid particles entering the first level pipe 10 and the second level pipe 20 return to the high-boiling-point removal tower 60, further reducing the possibility of blockage of the pipe openings at the first flange diaphragm box 31 and the second flange diaphragm box 32 due to solid particle agglomeration caused by condensation; at the same time, it can reduce the number of open-loop cleaning operations or completely eliminate open-loop cleaning operations, thereby reducing maintenance costs and workload, and reducing or eliminating the safety hazards of open-loop cleaning.

[0031] In this embodiment, the first valve 42 is preferably a pneumatic valve, which is opened once every 4 hours; the second valve 43 is preferably a one-way valve, which is normally open.

[0032] To prevent condensation of high-boiling-point substances inside the pipes, the same electric heating cable (not shown in the figure) is wrapped around the first liquid level pipe 10, the second liquid level pipe 20, the first pressure tapping pipe 11, the second pressure tapping pipe 21, and the flushing branch pipe 41. The electric heating cable starts at the low liquid level pipe inlet 61 and ends at the high liquid level pipe inlet 62. Temperature sensors 50, which are electrically connected to the electric heating cable, are installed on the first liquid level pipe 10 and the second liquid level pipe 20, respectively. The temperature sensors 50 are located downstream of the first flange diaphragm box 31 and the second flange diaphragm box 32, and are used to monitor the temperature of high-boiling-point substances entering the first liquid level pipe 10 and the second liquid level pipe 20 in real time. When the lower of the high-boiling-point temperatures in the first liquid level pipe 10 and the second liquid level pipe 20 is lower than the set temperature value, the electric heating cable is energized to start heating; otherwise, it is de-energized to stop heating. Heating with the electric heating tape can prevent the high-boiling-point substances entering the first level pipe 10, second level pipe 20, first pressure tapping pipe 11, and second pressure tapping pipe 21 from condensing and causing their solid particles to agglomerate and block the pipe openings. This further improves the accuracy of the level transmitter 30 in measuring the liquid level of the high-boiling-point removal tower 60, and further reduces the number of times the open-loop cleaning is needed, which is conducive to ensuring the safe and stable operation of the high-boiling-point removal tower 60 and the corresponding heat exchanger. At the same time, through the interlocking control between the temperature sensor 50 and the electric heating tape, overheating or underheating can be effectively avoided, ensuring that the internal temperature of the first level pipe 10, second level pipe 20, first pressure tapping pipe 11, and second pressure tapping pipe 21 is always in the optimal state, thereby achieving automatic temperature control to reduce power consumption.

[0033] In this embodiment, the preferred temperature is 120°C. This temperature is close to the boiling point of the high-boiling substances in the high-boiling-point removal tower 60, which can effectively prevent the high-boiling substances from condensing.

[0034] The first liquid level pipe 10, the second liquid level pipe 20, the first pressure tapping pipe 11, the second pressure tapping pipe 21, and the flushing branch pipe 41 are also provided with an insulation layer (not shown in the figure), which covers the electric heating cable. In this way, the insulation layer can effectively slow down the rate at which the heat from the electric heating cable dissipates and is conducted into the air, reduce heat loss and power consumption, maintain the stability of the internal temperature of the first liquid level pipe 10, the second liquid level pipe 20, the first pressure tapping pipe 11, and the second pressure tapping pipe 21, and further prevent high-boiling-point substances from condensing and agglomerating.

[0035] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A liquid level measuring device for a high-boiling-point dewatering tower, characterized in that, include: The first liquid level pipe is connected to the low liquid level port of the high-boiling point removal tower; The second liquid level pipe is connected to the high liquid level port of the deboiling tower; and The level transmitter has a first flange diaphragm and a second flange diaphragm. The first liquid level pipe and the second liquid level pipe are respectively inclined upward in parallel in the direction away from the high boiling point tower, and each of them is provided with a first pressure tapping pipe and a second pressure tapping pipe extending vertically upward; the first flange diaphragm box is connected to the first pressure tapping pipe, and the second flange diaphragm box is connected to the second pressure tapping pipe.

2. The liquid level measuring device for a high-boiling-point dewatering tower according to claim 1, characterized in that, The upward tilt angle of the first liquid level tube and the second liquid level tube is controlled within the range of 10 to 30°.

3. The liquid level measuring device for a high-boiling-point dewatering tower according to claim 2, characterized in that, The first liquid level tube and the second liquid level tube are each tilted upward at an angle of 20°.

4. The liquid level measuring device for a deboiling tower according to any one of claims 1 to 3, characterized in that: It also includes a flushing tube for introducing external clean liquid; The flushing pipe is provided with two flushing branch pipes that are respectively connected to the first liquid level pipe and the second liquid level pipe; Each of the aforementioned flushing branch pipes is equipped with a first valve and a second valve sequentially along the flow direction of the clear liquid.

5. The liquid level measuring device for a high-boiling-point dehydration tower according to claim 4, characterized in that: The first valve is a pneumatic valve, which is opened once every 4 hours; The second valve is a check valve, and its state is normally open.

6. The liquid level measuring device for a high-boiling-point dewatering tower according to claim 4, characterized in that: The first liquid level pipe, the second liquid level pipe, the first pressure tapping pipe, the second pressure tapping pipe, and the flushing branch pipe are all wrapped with the same electric heating tape, which starts at the low liquid level pipe opening and ends at the high liquid level pipe opening; Temperature sensors electrically connected to the electric heating tape are installed on the first liquid level tube and the second liquid level tube, respectively. The temperature sensors are located downstream of the first flange diaphragm box and the second flange diaphragm box, and are used to monitor the temperature of the high-boiling substance entering the first liquid level tube and the second liquid level tube in real time. When the lower of the two liquid level tubes (first and second) is below the set temperature, the electric heating cable is energized to start heating; otherwise, it is de-energized to stop heating.

7. The liquid level measuring device for a high-boiling-point dewatering tower according to claim 6, characterized in that, The set temperature value is 120℃.

8. The liquid level measuring device for a high-boiling-point dehydration tower according to claim 6 or 7, characterized in that: The first liquid level pipe, the second liquid level pipe, the first pressure tapping pipe, the second pressure tapping pipe, and the flushing branch pipe are also provided with a heat insulation layer. The insulation layer covers the outside of the electric heating tape.

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