Yellow phosphorus interface measuring device

Abstract

The utility model provides a yellow phosphorus interface measuring device. The device mainly comprises a diaphragm type differential pressure transmitter, a DCS (Distributed Control System), a yellow phosphorus storage tank, an automatic water replenishing device and an overflow hole. As the ignition point of yellow phosphorus is only 34 DEG C, the yellow phosphorus can spontaneously ignite when encountering air, and the yellow phosphorus needs to be stored in water. The pressure difference between the bottom and the top of the yellow phosphorus storage tank can be changed along with the change of the liquid level height of the yellow phosphorus according to a pressure and density formula P = rhogh. By utilizing the principle, the diaphragm type differential pressure transmitter can detect the change condition of the pressure, data are transmitted to the DCS control system, and the data can be converted into the yellow phosphorus height through simple calculation of the DCS control system. Therefore, the change condition of the yellow phosphorus height can be remotely monitored, the yellow phosphorus is prevented from overflowing, and the intrinsic safety of the yellow phosphorus storage tank is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to a yellow phosphorus interface level measuring device. Background Art

[0002] Yellow phosphorus is a very important chemical raw material, which is widely used in many fields such as agriculture, new energy, medicine and food. Yellow phosphorus is a substance that is prone to spontaneous combustion, with an ignition point of 40 °C. It can spontaneously combust when exposed to air, is insoluble in water, has a density greater than that of water, and can be placed in water to isolate air and prevent yellow phosphorus from spontaneous combustion. In the existing yellow phosphorus liquid level gauges, during the decline of the yellow phosphorus liquid level, some yellow phosphorus will adhere to the measuring device, which will affect the accuracy of the yellow phosphorus liquid level measurement. Affected by the fact that yellow phosphorus will spontaneously combust when exposed to air, the adhered yellow phosphorus will cause damage to the measuring device after combustion, affecting the measurement of the yellow phosphorus interface level. At the same time, the spontaneous combustion of yellow phosphorus also poses safety and environmental protection risks. Therefore, it is necessary to design a yellow phosphorus interface level measuring device to solve the above problems. Summary of the Invention

[0003] The technical problem to be solved by the utility model is that the yellow phosphorus measuring device has poor accuracy and is prone to the hidden danger of spontaneous combustion due to the adhesion of yellow phosphorus on the inner wall.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is: a yellow phosphorus interface level measuring device, including a yellow phosphorus storage tank, a diaphragm differential pressure transmitter with two detection ends respectively connected to the top and bottom of the yellow phosphorus storage tank, and a circulating water replenishment pipeline connected to the top of the yellow phosphorus storage tank. The diaphragm differential pressure transmitter is connected to a DCS control system. A water replenishment tank and a water replenishment pump are connected to the water replenishment pipeline, and the DCS control system is connected to control the water replenishment pump.

[0005] Preferably, measuring pipelines are installed at both the top and bottom of the side wall of the yellow phosphorus storage tank, and the two measuring pipelines are respectively connected to the two detection ends of the diaphragm differential pressure transmitter.

[0006] Preferably, an interlayer is arranged inside the measuring pipeline, and the interlayer is connected with a steam heating pipe.

[0007] Preferably, the water replenishment pipeline further includes an overflow pipeline with the top end connected to the overflow hole at the top of the side wall of the yellow phosphorus storage tank. The bottom end of the overflow pipeline is connected to the top of the water replenishment tank. The water inlet end of the water replenishment pump is connected to the bottom end of the water replenishment tank, and the output end of the water replenishment pump is connected to the top of the yellow phosphorus storage tank through a pipeline.

[0008] Preferably, a tuning fork sensor is installed at the inner top of the yellow phosphorus storage tank, and the tuning fork sensor is signal-connected to the motor for driving the water replenishment pump.

[0009] Preferably, vibration bars are uniformly arranged on the inner side wall of the yellow phosphorus storage tank, and the vibration bars are arranged vertically.

[0010] The utility model provides a yellow phosphorus interface level measuring device. By installing a differential pressure transmitter on the yellow phosphorus storage tank to measure the pressure difference between the top and bottom of the yellow phosphorus storage tank, and an automatic water replenishing device to ensure that the yellow phosphorus is always stored in water, the problems of inaccurate measurement and spontaneous combustion of yellow phosphorus during the measurement of the yellow phosphorus liquid level are solved, the situation of yellow phosphorus overflow is avoided, the safety production risk of production enterprises is reduced, and the inherent safety of the yellow phosphorus storage tank is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0012] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0013] In the figure: 1, DCS control system; 2, diaphragm differential pressure transmitter; 3, measurement pipeline; 4, yellow phosphorus storage tank; 5, tuning fork sensor; 6, overflow pipeline; 7, water replenishing tank; 8, water replenishing pump; 9, motor; 10, overflow hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] As Figure 1 shown, the present utility model provides a yellow phosphorus interface level measuring device, including a yellow phosphorus storage tank 4, a diaphragm differential pressure transmitter 2 with two detection ends respectively connected to the top and bottom of the yellow phosphorus storage tank 4, and a circulating water replenishing pipeline connected to the top of the yellow phosphorus storage tank 4. The diaphragm differential pressure transmitter 2 is connected to the DCS control system 1. A water replenishing tank 7 and a water replenishing pump 8 are connected to the water replenishing pipeline, and the DCS control system 1 is controllably connected to the water replenishing pump 8.

[0015] Two detection ends of the diaphragm differential pressure transmitter 2 are connected to the top and bottom of the yellow phosphorus storage tank 4 to measure the pressure difference between the bottom and the top of the yellow phosphorus storage tank 4. The data is transmitted to the DCS control system 1. The DCS control system 1 calculates the real-time height of the yellow phosphorus in the yellow phosphorus storage tank 4 through simple operations, displays the yellow phosphorus height on the display, and controls the water replenishing pump 8 to replenish water into the yellow phosphorus storage tank 4 after the yellow phosphorus height drops according to the set yellow phosphorus height value in the DCS control system 1, so as to ensure the water surface height in the yellow phosphorus storage tank 4, and even the yellow phosphorus attached to the inner wall of the yellow phosphorus storage tank 4 is always stored in water.

[0016] There is a certain relationship between the pressure and the density of the liquid to be measured as well as the liquid level height. When the height is constant, the greater the density of the liquid to be measured, the greater the pressure. According to this principle, a diaphragm differential pressure transmitter 2 is used to measure the pressure difference between the bottom and the top of the yellow phosphorus storage tank 4. Since there is a circulating water supply pipeline to supply water to the yellow phosphorus storage tank 4, the liquid level in the yellow phosphorus storage tank 4 remains unchanged. The change of the pressure difference actually reflects the change of the density in the yellow phosphorus storage tank 4. Because the densities of yellow phosphorus and water are different and both are fixed, when the liquid level height of the yellow phosphorus storage tank 4 is constant, the density in the yellow phosphorus storage tank 4 reflects the ratio of yellow phosphorus and water in the storage tank. Therefore, by calculating this ratio, the yellow phosphorus liquid level can be obtained. At the same time, since yellow phosphorus is always stored in water, contact with air is isolated. So the situation of yellow phosphorus spontaneous combustion will not occur.

[0017] As Figure 1 shown, to achieve the stable installation and accurate measurement of the diaphragm differential pressure transmitter 2. Measuring pipes 3 are installed at both the top and the bottom of the side wall of the yellow phosphorus storage tank 4, and the two measuring pipes 3 are respectively connected to the two detection ends of the diaphragm differential pressure transmitter 2. According to the measurement of the detection end at the top of the diaphragm differential pressure transmitter 2, the circulating water supply pipeline is controlled to supply water to the yellow phosphorus storage tank 4 to ensure that the liquid level at the top in the yellow phosphorus storage tank 4 is in a constant state.

[0018] As Figure 1 shown. A partition layer is arranged inside the measuring pipe 3, and a steam heating pipe is connected to the partition layer. Steam is introduced into the partition layer to prevent the yellow phosphorus in the measuring pipe 3 from solidifying and ensure that the yellow phosphorus can flow normally.

[0019] As Figure 1 shown. The water supply pipeline further includes an overflow pipeline 6 with the top end connected to the overflow hole 10 at the top of the side wall of the yellow phosphorus storage tank 4. The bottom end of the overflow pipeline 6 is connected to the top of the water supply tank 7. The water inlet end of the water supply pump 8 is connected to the bottom end of the water supply tank 7, and the output end of the water supply pump 8 is connected to the top of the yellow phosphorus storage tank 4 through a pipeline. The excess water in the yellow phosphorus storage tank 4 can be discharged through the overflow hole 10 and the overflow pipeline 6 for the recycling of the water used for yellow phosphorus storage.

[0020] As Figure 1 shown. A tuning fork sensor 5 is installed at the inner top of the yellow phosphorus storage tank 4. The tuning fork sensor 5 is signal-connected to the motor 9 for driving the water supply pump 8. The tuning fork sensor 5 is used to measure the water level in the yellow phosphorus storage tank 4. The tuning fork sensor 5 is connected to the motor 9 to control the start and stop of the water supply pump 8 to achieve the purpose of automatic water supply.

[0021] As a preferred embodiment of the present utility model. Vibration bars are uniformly arranged on the inner side wall of the yellow phosphorus storage tank 4, and the vibration bars are arranged vertically. When the tuning fork sensor 5 measures the water level, it will cause the upper layer of water to vibrate, which is then transmitted to the vibration bars. The vibration bars can shake off the yellow phosphorus attached to them and at the same time strengthen the flow of the yellow phosphorus at the bottom of the yellow phosphorus storage tank 4.

Claims

1. A yellow phosphorus interface level measuring device, characterized in that: It includes a yellow phosphorus storage tank (4), a diaphragm differential pressure transmitter (2) with two detection ends respectively connected to the top and bottom of the yellow phosphorus storage tank (4), and a circulating water replenishing pipeline connected to the top of the yellow phosphorus storage tank (4). The diaphragm differential pressure transmitter (2) is connected to a DCS control system (1). A water replenishing tank (7) and a water replenishing pump (8) are connected to the water replenishing pipeline, and the DCS control system (1) is controllably connected to the water replenishing pump (8).

2. The yellow phosphorus interface level measuring device according to claim 1, wherein: Measurement pipelines (3) are installed at both the top and bottom of the side wall of the yellow phosphorus storage tank (4), and the two measurement pipelines (3) are respectively connected to the two detection ends of the diaphragm differential pressure transmitter (2).

3. The yellow phosphorus interface level measuring device according to claim 2, characterized in that: A partition layer is arranged inside the measurement pipeline (3), and the partition layer is connected with a steam heating pipe.

4. The yellow phosphorus interface level measuring device as claimed in claim 1, wherein: The water replenishing pipeline further includes an overflow pipeline (6) with its top end connected to the overflow hole (10) at the top of the side wall of the yellow phosphorus storage tank (4). The bottom end of the overflow pipeline (6) is connected to the top of the water replenishing tank (7). The water inlet end of the water replenishing pump (8) is connected to the bottom end of the water replenishing tank (7), and the output end of the water replenishing pump (8) is connected to the top of the yellow phosphorus storage tank (4) through a pipeline.

5. The yellow phosphorus interface level measuring device according to claim 4, characterized in that: A tuning fork sensor (5) is installed at the inner top of the yellow phosphorus storage tank (4), and the tuning fork sensor (5) is signal-connected to the motor (9) for driving the water replenishing pump (8).

6. The yellow phosphorus interface level measuring device according to claim 5, wherein: Vibration bars are uniformly arranged on the inner side wall of the yellow phosphorus storage tank (4), and the vibration bars are arranged vertically.

Images