Automatic phosphorus discharging device of yellow phosphorus tank car

Abstract

The utility model discloses an automatic phosphorus unloading device for a yellow phosphorus tank car, which comprises the yellow phosphorus tank car, a yellow phosphorus unloading area, a metering tank and a hot water pool, and further comprises a lifting device positioned in the yellow phosphorus unloading area, and a liquid level radar and a hot water pipe connected with the hot water pool are arranged on the lifting device. The yellow phosphorus pipe is connected with the metering tank; and the yellow phosphorus pipe is communicated with the hot water pipe through a hot water control valve. According to the automatic phosphorus discharging device of the yellow phosphorus tank truck, liquid yellow phosphorus is conveyed according to the water level pressure difference principle and the siphon principle, and the problems of yellow phosphorus residue, blockage and the like caused by conveying through a machine pump are solved; the device is automatically operated in the whole process, the operation is simple, manual operation is not needed, the yellow phosphorus unloading efficiency and safety are improved, meanwhile, operators do not need to enter an unloading area for manual operation through full-automatic operation, occupational diseases caused by yellow phosphorus hazards are avoided, and safety accidents caused by the yellow phosphorus hazards are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of yellow phosphorus unloading, in particular to an automatic phosphorus unloading device for a yellow phosphorus tank truck. Background Art

[0002] Yellow phosphorus (also known as white phosphorus) is a colorless to yellow waxy solid. It is insoluble in water, poorly soluble in ethanol and glycerin, but relatively soluble in ether, benzene, carbon disulfide, and other substances. It is highly toxic, with an auto-ignition temperature of only 30°C. When exposed to air, it produces a bluish-green phosphorescence and white smoke in the dark. Its melting point is 44.1°C. It emits smoke and spontaneously ignites upon contact with air. Impact, friction, or contact with oxidants such as potassium chlorate can instantly ignite or even explode, making it a highly hazardous raw material.

[0003] Yellow phosphorus is primarily used in the production of phosphoric acid and polyphosphoric acid, and is widely used in agriculture, environmental protection, and new energy industries. Due to its active chemical properties and toxicity, yellow phosphorus is typically stored in water and must be submerged to prevent air pollution. Yellow phosphorus is solid at room temperature and must be heated to a temperature above 60°C to liquidize it before it can be transported. Therefore, when yellow phosphorus needs to be transferred from a yellow phosphorus storage tank, it must be heated to a liquid state. During transportation, yellow phosphorus is typically transported in tank trucks, which are water-sealed and airtight. For example, Chinese utility model patent publication No. CN220282331U discloses a safe and environmentally friendly yellow phosphorus unloading and storage device. The device features a siphon connection flange connected to one end of the yellow phosphorus inlet pipe located in the phosphorus unloading area. A glass sight glass is installed on the pipe, allowing the color of the yellow phosphorus entering the storage tank to be observed in real time, thereby providing a preliminary assessment of its quality. However, this device is inconvenient to operate, exhibits large metering errors, is not highly automated, and presents safety risks. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an automatic phosphorus unloading device for yellow phosphorus tank trucks which has convenient operation, small metering error and high automation degree.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an automatic phosphorus unloading device for yellow phosphorus tank trucks, comprising a yellow phosphorus tank truck, a yellow phosphorus unloading area, a metering tank and a hot water pool, the automatic phosphorus unloading device for yellow phosphorus tank trucks also comprising a lifting device located in the yellow phosphorus unloading area, the lifting device being provided with a liquid level radar, a hot water pipe connected to the hot water pool, and a yellow phosphorus pipe connected to the metering tank; the yellow phosphorus pipe and the hot water pipe are connected through a hot water control valve, an overflow pipe is provided on the upper part of the metering tank and is connected to the hot water pool, a weighing sensor is provided on the bottom of the metering tank; and an insulation device is provided on the yellow phosphorus pipe and the metering tank.

[0006] Furthermore, the hot water pool is connected to a steam pipe, a condensate pipe, and an industrial water pipe, and a submersible pump is provided in the hot water pool.

[0007] Furthermore, the heat-insulating devices on the yellow phosphorus tube and the metering tank are heat-insulating jacketed tubes, and the heat-insulating jacketed tubes are connected to steam pipes and condensed water pipes.

[0008] Furthermore, a section of hose is provided before the steam pipe and condensate pipe connected to the heat-insulating jacket of the metering tank are connected to the heat-insulating jacket. The hose can prevent the load of the yellow phosphorus pipe from acting on the metering tank when the metering tank is measuring, thereby avoiding affecting the accuracy of the metering tank's measurement.

[0009] Furthermore, the metering tank is filled with a yellow phosphorus layer and a heat-insulating water layer above the yellow phosphorus layer.

[0010] Furthermore, the connection port between the overflow pipe and the metering tank is located above the insulation water layer.

[0011] Furthermore, the yellow phosphorus tube is provided with a section of flexible pipe before being connected to the lifting device. The flexible pipe is provided to adapt to the lifting device to move up and down.

[0012] Furthermore, the hot water pipe is provided with a hose before being connected to the lifting device, and the hose is provided to adapt to the lifting device to move up and down.

[0013] Furthermore, it also includes a controller; the hot water pipe and the yellow phosphorus pipe are provided with a control valve; the steam pipe connected to the yellow phosphorus pipe and the insulation device on the metering tank and the hot water pool is provided with a control valve; the industrial water pipe is provided with a control valve; and the controller is connected to the control valve.

[0014] Furthermore, a liquid level sensor and a temperature sensor are provided in the hot water pool; a temperature sensor is provided on the insulation device of the yellow phosphorus pipe and the metering tank; and the liquid level sensor, temperature sensor, and weighing sensor are connected to the control valve.

[0015] The beneficial effects of the utility model are as follows: the automatic phosphorus unloading device for yellow phosphorus tank trucks of the utility model utilizes the water level pressure difference principle and the siphon principle to transport liquid yellow phosphorus, thereby avoiding the problems of yellow phosphorus residue and blockage caused by using a machine pump for transportation; the density difference between yellow phosphorus and water is utilized to measure yellow phosphorus, thereby ensuring the accuracy of measurement; the device is fully automated and easy to operate, without manual operation, thereby improving the efficiency and safety of yellow phosphorus unloading; at the same time, the fully automated operation does not require operators to enter the unloading area for manual operation, thereby avoiding occupational diseases caused by the hazards of yellow phosphorus and avoiding safety accidents caused by the hazards of yellow phosphorus. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of an embodiment of the utility model;

[0017] Figure 2 It is a logic control diagram of an embodiment of the utility model;

[0018] The markings in the figure are: 1: Yellow phosphorus tank truck, 2: Yellow phosphorus unloading area, 3: Metering tank, 4: Hot water pool, 5: Controller, 6: Submersible pump, 7: Hot water pipe, 8: Yellow phosphorus pipe, 9: Steam pipe, 10: Condensate pipe, 11: Lifting device, 12: Overflow pipe, 13: Insulation device, 14: Hose, WT-01: Weighing sensor, TT-01: Yellow phosphorus pipe insulation device temperature sensor, TT-02: Metering tank insulation device temperature sensor, TT-03: Hot water pool temperature sensor, LT-01: Hot water pool liquid level sensor, HV-01: Hot water pipe control valve, HV-02: Hot water control valve, HV-03: Yellow phosphorus pipe insulation device steam control valve, HV-04: Metering tank insulation device steam control valve, HV-05: Hot water pool steam control valve, HV-06: Industrial water control valve, HV-07: Yellow phosphorus pipe control valve. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Example:

[0021] like Figure 1 As shown, an automatic phosphorus unloading device for yellow phosphorus tank trucks includes a yellow phosphorus tank truck 1, a yellow phosphorus unloading area 2, a metering tank 3 and a hot water pool 4. The automatic phosphorus unloading device for yellow phosphorus tank trucks also includes a lifting device 11 located in the yellow phosphorus unloading area 2, and the lifting device 11 is provided with a liquid level radar, a hot water pipe 7 connected to the hot water pool 4, and a yellow phosphorus pipe 8 connected to the metering tank 3; the yellow phosphorus pipe 8 and the hot water pipe 7 are connected through a hot water control valve HV-02, an overflow pipe 12 is provided on the upper part of the metering tank 3 and is connected to the hot water pool 4, and a weighing sensor WT-01 is provided at the bottom of the metering tank 3; an insulation device 13 is provided on the yellow phosphorus pipe 8 and the metering tank 3.

[0022] The hot water pool 4 is connected to a steam pipe 9 , a condensed water pipe 10 , and an industrial water pipe. A submersible pump 6 is provided in the hot water pool 4 .

[0023] The heat-insulating device 13 on the yellow phosphorus tube 8 and the metering tank 3 is a heat-insulating jacketed pipe, and the heat-insulating jacketed pipe is connected to a steam pipe 9 and a condensed water pipe 10 .

[0024] The steam pipe 9 and the condensed water pipe 10 connected to the heat-insulating jacket of the metering tank 3 are provided with a section of hose 14 before being connected to the heat-insulating jacket.

[0025] The metering tank 3 contains a yellow phosphorus layer and a heat-insulating water layer above the yellow phosphorus layer; the connection port between the overflow pipe 12 and the metering tank 3 is located above the heat-insulating water layer.

[0026] The yellow phosphorus pipe 8 is provided with a section of hose 14 before being connected to the lifting device 11 ; the hot water pipe 7 is provided with a section of hose 14 before being connected to the lifting device 11 .

[0027] The system also includes a controller 5; control valves are installed on the hot water pipe 7 and the yellow phosphorus pipe 8; a control valve is installed on the steam pipe 9 connected to the yellow phosphorus pipe 8, the heat preservation device 13 on the metering tank 3, and the hot water pool 4; a control valve is installed on the industrial water pipe; and the controller 5 is connected to the control valve. A liquid level sensor LT-01 and a temperature sensor TT-03 are installed in the hot water pool 4; a temperature sensor is installed on the yellow phosphorus pipe 8 and the heat preservation device 13 on the metering tank 3; and the liquid level sensor, temperature sensor, and weighing sensor are connected to the control valve 5.

[0028] The automatic phosphorus unloading process of an automatic phosphorus unloading device for a yellow phosphorus tank truck is as follows:

[0029] 1. Preparation stage:

[0030] (1) The yellow phosphorus tank truck 1 that has undergone phosphorus melting arrives at the designated yellow phosphorus unloading area 2;

[0031] (2) Start the automatic unloading procedure;

[0032] (3) The lifting device 11 descends, and the yellow phosphorus pipe 8 is inserted into the yellow phosphorus tank truck 1. After the pipe touches the bottom of the tank, the sensor of the lifting device 11 is triggered, and the lifting device 11 rises 40 mm to ensure that the lower end of the pipe is 50 mm away from the bottom of the tank. The liquid level radar is activated and the highest position H1 of the liquid level in the yellow phosphorus tank truck 1 is recorded.

[0033] (4) When the hot water pool temperature detection TT-03 is ≤60℃, start the steam pipe valve HV-05 to heat the water in the hot water pool 4. When TT-03 is greater than 65℃, stop the steam pipe valve HV-05 and turn off the heating;

[0034] (5) When the hot water pool liquid level detection LT-01 is ≤ 60%, the industrial water pipe valve HV-06 is started to replenish the water in the hot water pool 4. When LT-01 is greater than 85%, the industrial water pipe valve HV-06 is stopped to close the water replenishment;

[0035] (6) Open the valve HV-07 of the yellow phosphorus pipe 8, open the valve HV-02 of the hot water pipe, start the hot water submersible pump 6, and let the hot water flush the yellow phosphorus pipe 8 for at least 5 minutes to ensure that the yellow phosphorus pipe 8 is unobstructed and the hot water flows into the metering tank 3;

[0036] (7) Hot water flows into the metering tank 3 through the yellow phosphorus pipe 8. The weighing instrument WT-01 of the metering tank 3 starts to measure. When WT-01 detects no change twice after two minutes (error ±0.5%), it means that the metering tank 3 is full of hot water and the hot water has flowed into the hot water tank 4 through the overflow pipe 12. Then close the yellow phosphorus pipe valve HV-07;

[0037] (8) 30 seconds after closing the yellow phosphorus pipe valve HV-07 (can be set according to site conditions, the default is 30s), turn off the hot water submersible pump 6, close the hot water pipe valve HV-02, and fill the yellow phosphorus pipe 8 with hot water;

[0038] (9) When the temperature of the outer jacket of the yellow phosphorus tube is detected to be TT-01≤60℃, start the steam pipe valve HV-03 to heat the yellow phosphorus tube 8. When TT-01>65℃, stop the steam pipe valve HV-05 and turn off the heating to avoid solidification of the yellow phosphorus during the transportation of liquid yellow phosphorus.

[0039] (10) When the jacket temperature of metering tank 3 is detected as TT-02 ≤ 60°C, start the steam pipe valve HV-04 to heat metering tank 3. When TT-02 is greater than 65°C, stop the steam pipe valve HV-04 and turn off the heating to avoid the solidification of yellow phosphorus in metering tank 3 and the blockage of yellow phosphorus transportation.

[0040] 2. Transportation stage:

[0041] (1) Open the yellow phosphorus pipe valve HV-07. The position of the yellow phosphorus tank truck 1 is higher than that of the metering tank 3. After opening HV-07, the water in the yellow phosphorus pipe 8 flows into the metering tank 3. By utilizing the principle of water level pressure difference and the siphon principle, the liquid yellow phosphorus begins to be transported from the yellow phosphorus tank truck 1 to the bottom of the metering tank 3. The water at the upper end of the metering tank 3 flows into the hot water pool 4 through the overflow pipe 12.

[0042] (2) During the yellow phosphorus transportation process, the liquid level radar of the lifting device 11 detects the liquid level L1 in the yellow phosphorus tank truck 1 in real time. When the maximum liquid level minus the real-time liquid level, that is, (H1-L1)≤0.4m (it can be set according to the on-site conditions. Generally, the thickness of the upper water layer of the yellow phosphorus tank truck 1 is greater than 0.5m, so the default value is (H1-L1)=0.4m), the hot water submersible pump 6 and the hot water pipe valve HV-01 are started to introduce hot water into the yellow phosphorus tank truck 1 to avoid the liquid level from decreasing, which may cause the yellow phosphorus adhered to the pipes in the yellow phosphorus tank truck 1 and the yellow phosphorus at the bottom of the yellow phosphorus tank to contact the air, causing spontaneous combustion and safety problems. When the real-time liquid level L1 is greater than the maximum liquid level minus 100mm, that is, L1>(H1-100), the hot water submersible pump 6 and the hot water pipe valve HV-01 are closed.

[0043] 3. Measurement stage:

[0044] (1) During the yellow phosphorus transportation process, the volume of water and yellow phosphorus in the metering tank 3 does not change. Using the density difference between water and yellow phosphorus, the metering tank weighing instrument WT-01 starts to measure the mass of yellow phosphorus;

[0045] (2) Wait for WT-01 to automatically detect three times (2 minutes each time). If there is no change in the three measurement results (error ±0.5%), it means that the yellow phosphorus pipeline is transporting water instead of yellow phosphorus, and the yellow phosphorus transportation of yellow phosphorus tank truck 1 is completed.

[0046] 4. Ending stage:

[0047] (1) Start the hot water submerged pump 6 and the hot water pipe valve HV-02 to flush the yellow phosphorus pipe with hot water to prevent residual yellow phosphorus in the pipe; after 2 minutes (can be set according to site conditions, the default is 2 minutes), close the yellow phosphorus pipe valve HV-07 to allow water to backwash the yellow phosphorus pipe in the yellow phosphorus tank truck; after 30 seconds (can be set according to site conditions, the default is 30 seconds), close the hot water submerged pump and the hot water pipe valve HV-02;

[0048] (2) The lifting device 11 rises 1m and then falls 1m, and this is repeated three times to ensure that there is no residual yellow phosphorus in the yellow phosphorus pipeline; the lifting device 11 rises and resets, and the yellow phosphorus pipeline valve HV-07 is opened to discharge the hot water inside the yellow phosphorus pipeline; after this operation for 30 seconds, the yellow phosphorus pipeline valve HV-07 is closed;

[0049] (3) The yellow phosphorus tank truck 1 leaves the yellow phosphorus unloading area 2, and the yellow phosphorus unloading process is completed.

Claims

1. An automatic phosphorus unloading device for a yellow phosphorus tank truck, comprising a yellow phosphorus tank truck, a yellow phosphorus unloading area, a metering tank, and a hot water pool, characterized in that: The automatic phosphorus unloading device for yellow phosphorus tank trucks also includes a lifting device located in the yellow phosphorus unloading area, on which a liquid level radar, a hot water pipe connected to a hot water pool, and a yellow phosphorus pipe connected to a metering tank are provided; the yellow phosphorus pipe and the hot water pipe are connected through a hot water control valve, an overflow pipe is provided on the upper part of the metering tank and connected to the hot water pool, and a weighing sensor is provided at the bottom of the metering tank; an insulation device is provided on the yellow phosphorus pipe and the metering tank.

2. The automatic phosphorus unloading device for yellow phosphorus tank trucks according to claim 1, characterized in that: The hot water pool is connected to a steam pipe, a condensed water pipe, and an industrial water pipe, and a submersible pump is arranged in the hot water pool.

3. The automatic phosphorus unloading device for yellow phosphorus tank trucks according to claim 1, characterized in that: The heat-insulating devices on the yellow phosphorus tube and the metering tank are heat-insulating jacketed pipes, and the heat-insulating jacketed pipes are connected to a steam pipe and a condensed water pipe.

4. The automatic phosphorus unloading device for yellow phosphorus tank trucks according to claim 3, characterized in that: The steam pipe and the condensed water pipe connected to the heat-insulating jacket pipe of the metering tank are provided with a section of hose before being connected to the heat-insulating jacket pipe.

5. The automatic phosphorus unloading device for yellow phosphorus tank trucks according to claim 1, characterized in that: The metering tank is filled with a yellow phosphorus layer and a heat-insulating water layer above the yellow phosphorus layer.

6. The automatic phosphorus unloading device for yellow phosphorus tank trucks according to claim 5, characterized in that: The connection port of the overflow pipe and the metering tank is located above the thermal insulation water layer.

7. The automatic phosphorus unloading device for yellow phosphorus tank trucks according to claim 1, characterized in that: The yellow phosphorus pipe is provided with a section of soft hose before being connected to the lifting device.

8. The automatic phosphorus unloading device for yellow phosphorus tank trucks according to claim 1, characterized in that: The hot water pipe is provided with a section of hose before being connected to the lifting device.

9. The automatic phosphorus unloading device for yellow phosphorus tank trucks according to claim 2, characterized in that: It also includes a controller; control valves are provided on the hot water pipe and the yellow phosphorus pipe; a control valve is provided on the steam pipe connected to the yellow phosphorus pipe and the insulation device on the metering tank and the hot water pool; a control valve is provided on the industrial water pipe; and the controller is connected to the control valve.

10. The automatic phosphorus unloading device for yellow phosphorus tank trucks according to claim 9, characterized in that: A liquid level sensor and a temperature sensor are provided in the hot water pool; a temperature sensor is provided on the heat preservation device of the yellow phosphorus pipe and the metering tank; the liquid level sensor, the temperature sensor and the weighing sensor are connected to the control valve.

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