Melted phosphorus supply device

Abstract

The utility model discloses a molten phosphorus supply device, and belongs to the technical field of phosphorus chemical industry. The device comprises a phosphorus storage tank, a settling tank and at least one ground tank, a lower heating coil and an upper heating coil are respectively arranged at the lower parts and the upper parts in the phosphorus storage tank, the settling tank and the ground tank, and the phosphorus storage tank, the settling tank and the ground tank are filled with water and yellow phosphorus; the geosyncline is positioned near the phosphorus burning tower; the lower portion of the phosphorus storage tank is connected with the lower portion of the settling tank through a pipeline with a first delivery pump, the settling tank is higher than the ground tank, the bottom of the settling tank is connected with the lower portion of the ground tank through a pipeline with a valve, the lower portion of the ground tank is connected with the phosphorus burning tower through a pipeline with a second delivery pump, and the top of the ground tank is closed. Tank covers at the tops of the phosphorus storage tank and the settling tank are detachably arranged, the upper part of the phosphorus storage tank is connected with an alkali liquor supply structure and a clear water supply structure through pipelines, and the upper parts of the settling tank and the ground tank are connected with the clear water supply structure through pipelines. The settling tank is arranged to treat yellow phosphorus, the phosphorus storage tank and the settling tank need to be cleaned regularly, and the ground tank does not need to be cleaned.

Description

Technical Field

[0001] The utility model belongs to the technical field of phosphorus chemical industry, and particularly relates to a molten phosphorus supply device, which is mainly used for producing thermal phosphoric acid. Background Art

[0002] Phosphoric acid uses molten yellow phosphorus as raw material, which reacts with dried air in a phosphorus burning tower to generate phosphorus pentoxide fume, which then reacts with water to form phosphoric acid.

[0003] For example, the patent with application number CN202120468711.7 discloses a thermal phosphoric acid production system capable of monitoring the degree of hydration, comprising a control room, a post-processing device, and a phosphorus melting device, a combustion tower, a primary hydration device and a secondary hydration device connected in sequence through pipelines, wherein the primary hydration device comprises a hydration tower, a circulation pool, a circulation pump and a heat exchanger connected in sequence end to end through a circulation pipeline, an electric control box is provided in the control room, and the secondary hydration device is connected to the post-processing device through a pipeline; an electric-controlled three-way valve is provided on the outlet of the circulation pump, and the electric-controlled three-way valve is output in two ways, one way is output to the hydration tower, and the other way is output to the post-processing device; an ammeter is provided on the power supply line of the circulation pump, an electronic flowmeter for detecting the flow of the circulation pump is provided on the circulation pipeline, and an electronic thermometer is provided on the hot water inlet of the heat exchanger; an ammeter, a control structure of the circulation pump, a display structure of the electronic flowmeter, a display structure of the electronic thermometer and a control structure of the electric-controlled three-way valve are provided in the electric control box.

[0004] In the prior art, since the ignition point of yellow phosphorus is relatively low, spontaneous combustion will occur as long as the liquid yellow phosphorus is exposed to the air. Therefore, the storage of yellow phosphorus must be sealed with water. In the prior art, the supply of yellow phosphorus is mainly to send the yellow phosphorus in the phosphorus storage tank to the phosphorus burning tower for reaction. The lower and upper parts of the phosphorus storage tank are respectively provided with a lower heating coil and an upper heating coil. The phosphorus storage tank is filled with water and yellow phosphorus, with the yellow phosphorus at the bottom and the water at the top to form a liquid seal.

[0005] When the applicant used the existing technology, he found the following problems: the quality of commercially available molten phosphorus was inconsistent, and some yellow phosphorus contained certain impurities (such as mud phosphorus) that needed to be processed. Summary of the invention

[0006] In order to solve the above problems, the embodiment of the utility model provides a molten phosphorus supply device, which is provided with a sedimentation tank to process yellow phosphorus. The phosphorus storage tank and the sedimentation tank need to be cleaned regularly, but the ground trough does not need to be cleaned. The technical solution is as follows:

[0007] The utility model embodiment provides a molten phosphorus supply device, including a phosphorus storage tank 1, wherein the lower part and the upper part of the phosphorus storage tank 1 are respectively provided with a lower heating coil 4 and an upper heating coil 5, and the phosphorus storage tank 1 contains water 6 and yellow phosphorus 7; the molten phosphorus supply device also includes a sedimentation tank 2 and at least one ground trough 3, wherein the ground trough 3 is located near the phosphorus burning tower; the lower part and the upper part of the sedimentation tank 2 and the ground trough 3 are also respectively provided with a lower heating coil 4 and an upper heating coil 5; the sedimentation tank 2 and the ground trough 3 also contain water 6 and yellow phosphorus 7; the lower part of the phosphorus storage tank 1 The bottom of the phosphorus storage tank 1 and the sedimentation tank 2 are connected to the lower part of the sedimentation tank 2 through a pipeline with a first delivery pump 8. The sedimentation tank 2 is higher than the ground trough 3 and its bottom is connected to the lower part of the ground trough 3 through a pipeline with a valve. The lower part of the ground trough 3 is connected to the phosphorus burning tower through a pipeline with a second delivery pump 9. The top of the ground trough 3 is closed, and the tank covers on the tops of the phosphorus storage tank 1 and the sedimentation tank 2 are detachably arranged. The upper part of the phosphorus storage tank 1 is connected to the alkali solution supply structure and the clean water supply structure through a pipeline, and the upper part of the sedimentation tank 2 and the ground trough 3 is connected to the clean water supply structure through a pipeline.

[0008] Among them, the phosphorus storage tank 1 in the embodiment of the utility model is an underground tank with a wall on the side of the tank, which is a concrete tank, and the tank cover on the top is a plate structure; the sedimentation tank 2 is an above-ground tank, and the tank cover on the top is a mesh structure, which is a metal tank; the ground tank 3 is an underground tank, which is a metal tank.

[0009] Specifically, the mesh aperture of the mesh structure in the embodiment of the utility model is less than 2 mm.

[0010] Furthermore, the trough covers of the phosphorus storage tank 1 and the ground trough 3 in the embodiment of the utility model are both provided with inspection ports and sampling ports.

[0011] Among them, the first delivery pump 8 in the embodiment of the utility model is arranged on the tank cover at the top of the phosphorus storage tank 1, and the second delivery pump 9 is arranged on the tank cover at the top of the ground tank 3.

[0012] Among them, the phosphorus storage tank 1, the sedimentation tank 2 and the ground trough 3 in the embodiment of the utility model are all provided with a lower thermometer and a lower liquid level gauge 10 in the lower part, the sedimentation tank 2 and the ground trough 3 are all provided with an upper thermometer and an upper liquid level gauge 11 in the upper part, and the phosphorus storage tank 1 is provided with an upper thermometer, an upper liquid level gauge 11 and a pH meter in the upper part; in the phosphorus storage tank 1, the lower heating coil 4, the lower thermometer and the lower liquid level gauge 10 are located in the yellow phosphorus 7, and the upper heating coil 5, the upper thermometer, the upper liquid level gauge 11 and the pH meter are located in the water 6; in the sedimentation tank 2 and the ground trough 3, the lower heating coil 4, the lower thermometer and the lower liquid level gauge 10 are located in the yellow phosphorus 7, and the upper heating coil 5, the upper thermometer and the upper liquid level gauge 11 are located in the water 6.

[0013] Furthermore, a heat-insulating jacket is provided on the pipeline in the embodiment of the utility model.

[0014] Specifically, the volume of the phosphorus storage tank 1 in the embodiment of the utility model is 40-70 cubic meters, the volume of the sedimentation tank 2 is 5-10 cubic meters, and the volume of the ground trough 3 is 1.5-3.5 cubic meters.

[0015] The beneficial effects of the technical solution provided by the embodiment of the utility model are as follows: the embodiment of the utility model provides a molten phosphorus supply device, and a sedimentation tank is set to process yellow phosphorus. The phosphorus storage tank (cleaned almost once a year, which can be cleaned during the shutdown and maintenance period at the end of the year) and the sedimentation tank (cleaned once every 2-6 months, cleaned as needed, and a mesh structure is set for easy disassembly) need to be cleaned regularly, and the ground trough does not need to be cleaned. The phosphorus storage tank, sedimentation tank and ground trough are all water-sealed to ensure safety. The water in the phosphorus storage tank is controlled near neutral by adding alkali to ensure the quality of the yellow phosphorus. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a principle block diagram of the molten phosphorus supply device in the embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the molten phosphorus supply device in the embodiment of the utility model.

[0018] In the figure: 1 phosphorus storage tank, 2 sedimentation tank, 3 ground trough, 4 lower heating coil, 5 upper heating coil, 6 water, 7 yellow phosphorus, 8 first delivery pump, 9 second delivery pump, 10 lower liquid level gauge, 11 upper liquid level gauge. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0020] Example 1

[0021] See also Figure 1-2Embodiment 1 provides a molten phosphorus supply device, which includes a phosphorus storage tank 1, a settling tank 2 and at least one ground trough 3, etc. The phosphorus storage tank 1 is used to store yellow phosphorus, separate part of the mud phosphorus and separate acidic substances, etc. The settling tank 2 is used to separate the mud phosphorus, and the ground trough 3 is used to temporarily store yellow phosphorus. The phosphorus storage tank 1, the settling tank 2 and the ground trough 3 are respectively provided with a lower heating coil 4 and an upper heating coil 5 at the lower and upper parts. The phosphorus storage tank 1, the settling tank 2 and the ground trough 3 are filled with water 6 and yellow phosphorus 7, with the yellow phosphorus 7 at the bottom and the water 6 at the top to form a liquid seal. Steam or hot water is introduced into the lower heating coil 4 and the upper heating coil 5. The lower heating coil 4 is used to heat the yellow phosphorus 7 to about 60°C, and the upper heating coil 5 is used to heat the water to about 60°C. The ground trough 3 is located near the phosphorus burning tower, and each phosphorus burning tower is provided with a ground trough 3. The lower part of the phosphorus storage tank 1 is connected to the lower part of the sedimentation tank 2 through a pipeline with a first delivery pump 8 to output yellow phosphorus to the sedimentation tank 2. The sedimentation tank 2 is higher than the ground trough 3 and its bottom is connected to the lower part of the ground trough 3 through a pipeline with a valve to output yellow phosphorus to the ground trough 3. The sedimentation tank 2 outputs yellow phosphorus by gravity, avoiding pump disturbance and improving the separation effect. The lower part of the ground trough 3 is connected to the spray gun of the phosphorus burning tower through a pipeline with a second delivery pump 9 to output yellow phosphorus. The top of the ground trough 3 is closed, and the tank covers on the top of the phosphorus storage tank 1 and the sedimentation tank 2 are detachably arranged for regular cleaning. The upper part of the phosphorus storage tank 1 is connected to the alkali solution supply structure and the clean water supply structure through a pipeline to add alkali solution (specifically sodium hydroxide solution) and replenish water respectively, and the upper part of the sedimentation tank 2 and the ground trough 3 is connected to the clean water supply structure through a pipeline to replenish water. Specifically, the first delivery pump 8 is arranged on the tank cover at the top of the phosphorus storage tank 1, and the second delivery pump 9 is arranged on the tank cover at the top of the ground tank 3. When cleaning the sedimentation tank 2, the yellow phosphorus is first output to the ground tank 3, the mud phosphorus in the middle is left in the sedimentation tank 2, and then the water in the sedimentation tank 2 is drained (drained or a drain port is provided at the bottom of the sedimentation tank 2), and finally the tank cover is removed to clean the mud phosphorus.

[0022] Among them, the phosphorus storage tank 1 in the embodiment of the utility model is an underground tank, and a wall is provided on the side of the tank. It is a concrete tank, and the tank cover on the top is a plate-like structure, which is specifically a rectangular tank. The sedimentation tank 2 is an above-ground tank, and the tank cover on the top is a mesh structure (equivalent to an open structure), which is a metal tank, and specifically a rectangular tank. The ground trough 3 is an underground tank, which is a metal tank. Among them, the volume of the phosphorus storage tank 1 is the largest, which is larger than the volume of a tank truck; the volume of the sedimentation tank 2 is medium, and the ground trough 3 is the smallest. Specifically, the mesh aperture of the mesh structure is less than 2mm to prevent impurities from entering the sedimentation tank 2. The tank covers of the phosphorus storage tank 1 and the ground trough 3 are both provided with inspection ports and sampling ports, and the inspection ports and sampling ports are both manholes, the inspection ports are larger, and the sampling ports are smaller.

[0023] Among them, see Figure 2In the embodiment of the utility model, the phosphorus storage tank 1, the sedimentation tank 2 and the ground trough 3 are provided with a lower thermometer and a lower liquid level gauge 10 in the lower part, the sedimentation tank 2 and the ground trough 3 are provided with an upper thermometer and an upper liquid level gauge 11 in the upper part, and the phosphorus storage tank 1 is provided with an upper thermometer, an upper liquid level gauge 11 and a pH meter in the upper part. The lower thermometer, the lower liquid level gauge 10, the upper thermometer, the upper liquid level gauge 11 and the pH meter are all arranged vertically and are all arranged on the corresponding tank cover. In the phosphorus storage tank 1, the lower heating coil 4, the lower thermometer and the lower liquid level gauge 10 are located in the yellow phosphorus 7, and the upper heating coil 5, the upper thermometer, the upper liquid level gauge 11 and the pH meter are located in the water 6. In the sedimentation tank 2 and the ground trough 3, the lower heating coil 4, the lower thermometer and the lower liquid level gauge 10 are located in the yellow phosphorus 7, and the upper heating coil 5, the upper thermometer and the upper liquid level gauge 11 are located in the water 6.

[0024] Furthermore, a heat-insulating jacket is provided on the pipeline in the embodiment of the utility model to insulate the pipeline.

[0025] Example 2

[0026] Embodiment 2 provides a molten phosphorus supply device, the structure of which is basically the same as that of Embodiment 1, except that: the volume of the phosphorus storage tank 1 in this embodiment is 40-70 cubic meters, the volume of the sedimentation tank 2 is 5-10 cubic meters, and the volume of the ground trough 3 is 1.5-3.5 cubic meters. Specifically, the total volume of the phosphorus storage tank 1 is 50 cubic meters, the effective volume is 30 cubic meters, and the maximum storage capacity is 45 tons; the specifications of the sedimentation tank 2 are 1.5m*1.5m*3m. The number of ground troughs 3 is two, and the specifications of the ground troughs 3 are 7600mm*200mm*1400mm.

[0027] The “first” and “second” in this embodiment are only used for distinction and have no other special meanings.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A molten phosphorus supply device, comprising a phosphorus storage tank (1), wherein a lower heating coil (4) and an upper heating coil (5) are respectively arranged at the lower and upper parts of the phosphorus storage tank (1), and the phosphorus storage tank (1) contains water (6) and yellow phosphorus (7); characterized in that: The molten phosphorus supply device also includes a sedimentation tank (2) and at least one ground trough (3), wherein the ground trough (3) is located near the phosphorus burning tower; the lower part and the upper part of the sedimentation tank (2) and the ground trough (3) are respectively provided with a lower heating coil (4) and an upper heating coil (5); the sedimentation tank (2) and the ground trough (3) are also filled with water (6) and yellow phosphorus (7); the lower part of the phosphorus storage tank (1) is connected to the lower part of the sedimentation tank (2) through a pipeline with a first delivery pump (8), and the sedimentation tank (2) is relatively The trough (3) is high and its bottom is connected to the lower part of the trough (3) through a pipeline with a valve. The lower part of the trough (3) is connected to the phosphorus burning tower through a pipeline with a second delivery pump (9). The top of the trough (3) is closed. The tank covers on the tops of the phosphorus storage tank (1) and the sedimentation tank (2) are detachably arranged. The upper part of the phosphorus storage tank (1) is connected to the alkali solution supply structure and the clean water supply structure through a pipeline. The upper parts of the sedimentation tank (2) and the trough (3) are connected to the clean water supply structure through a pipeline.

2. The molten phosphorus supply device according to claim 1, characterized in that: The phosphorus storage tank (1) is an underground tank, with a wall on the side of the tank, which is a concrete tank, and the tank cover on the top is a plate-like structure; the sedimentation tank (2) is an above-ground tank, with a tank cover on the top of the tank being a mesh structure, and it is a metal tank; the ground tank (3) is an underground tank, which is a metal tank.

3. The molten phosphorus supply device according to claim 2, characterized in that: The mesh size of the mesh structure is less than 2 mm.

4. The molten phosphorus supply device according to claim 2, characterized in that: The trough covers of the phosphorus storage tank (1) and the ground trough (3) are both provided with inspection ports and sampling ports.

5. The molten phosphorus supply device according to claim 2, characterized in that: The first delivery pump (8) is arranged on the tank cover at the top of the phosphorus storage tank (1), and the second delivery pump (9) is arranged on the tank cover at the top of the ground tank (3).

6. The molten phosphorus supply device according to claim 1, characterized in that: The phosphorus storage tank (1), the sedimentation tank (2) and the ground trough (3) are all provided with a lower thermometer and a lower liquid level gauge (10) at their lower parts, the sedimentation tank (2) and the ground trough (3) are all provided with an upper thermometer and an upper liquid level gauge (11) at their upper parts, and the phosphorus storage tank (1) is provided with an upper thermometer, an upper liquid level gauge (11) and a pH meter at its upper part; In the phosphorus storage tank (1), the lower heating coil (4), the lower thermometer and the lower liquid level gauge (10) are located in the yellow phosphorus (7), and the upper heating coil (5), the upper thermometer, the upper liquid level gauge (11) and the pH meter are located in the water (6); in the sedimentation tank (2) and the ground trough (3), the lower heating coil (4), the lower thermometer and the lower liquid level gauge (10) are located in the yellow phosphorus (7), and the upper heating coil (5), the upper thermometer and the upper liquid level gauge (11) are located in the water (6).

7. The molten phosphorus supply device according to claim 1, characterized in that: The pipeline is provided with a heat-insulating jacket.

8. The molten phosphorus supply device according to claim 1, characterized in that: The volume of the phosphorus storage tank (1) is 40-70 cubic meters, the volume of the sedimentation tank (2) is 5-10 cubic meters, and the volume of the ground trough (3) is 1.5-3.5 cubic meters.

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