A dropwise adding tank for phosphorous acid production

Abstract

The utility model discloses a drop tank for phosphorous acid production, including jar body and jar cover, the upper surface of jar body is provided with jar cover, the upper surface of jar cover is provided with nitrogen inlet and gas outlet, the lower surface of jar cover is provided with circular annular cleaning pipe, and the outer surface of circular annular cleaning pipe is provided with several sleeves, each sleeve is provided with a shower nozzle, the upper surface of circular annular cleaning pipe is provided with water inlet, and the water inlet passes through the jar cover and is connected with the jar cover, and the central position of jar cover is provided with feed inlet, and the outside of jar body is wrapped with a jacket, and the bottom of jar body is provided with discharge gate, the utility model discloses reasonable in structure, and the outside of jar body is provided with a jacket, and the lower surface of jar cover is provided with circular annular cleaning pipe, and the periphery of circular annular cleaning pipe is provided with several spray nozzles, and the cooperation of circular annular cleaning pipe and spray nozzle can carry out the quick flushing of jar body inner wall, and then the quick drying of jar body interior is carried out by the cooperation of jacket and high temperature steam, thereby reducing the time of waiting for drying, and improving the production efficiency of phosphorous acid as a whole.

Description

Technical Field

[0001] This utility model relates to the field of dripping tank technology, specifically a dripping tank for the production of phosphorous acid. Background Technology

[0002] In the industrial production of phosphorous acid, the most classic and widely used method is the phosphorus trichloride hydrolysis process. The core control of this process lies in the precise operation of the dropping tank. The dropping tank, also known as a metering tank or high-level tank, mainly functions to safely, accurately, and controllably deliver phosphorus trichloride raw material into the reaction vessel (hydrolysis vessel).

[0003] After cleaning, the existing drip tanks used in phosphorous acid production generally need to be allowed to dry naturally, or they can be dried by air. However, the drying efficiency is low, which affects the overall production efficiency in continuous phosphorous acid production. Therefore, there is an urgent need for an improved technology to solve this problem in the existing technology. Summary of the Invention

[0004] The purpose of this invention is to provide a dripping tank for the production of phosphorous acid, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dripping tank for phosphorous acid production, comprising a tank body and a tank cover. The tank cover is provided on the upper surface of the tank body, and a nitrogen inlet and outlet are provided on the upper surface of the tank cover. A circular cleaning pipe is provided on the lower surface of the tank cover, and a plurality of sleeves are provided on the outer surface of the circular cleaning pipe. Each sleeve is provided with a nozzle. A water inlet is provided on the upper surface of the circular cleaning pipe, and the water inlet passes through the tank cover and is connected to the tank cover. A feed inlet is provided through the center of the tank cover. The tank body is wrapped with a jacket, and a discharge port is provided at the bottom of the tank body.

[0006] Preferably, the present invention provides a dropping tank for the production of phosphorous acid, wherein the outer surface of the jacket is provided with several supports.

[0007] Preferably, the present invention provides a dripping tank for the production of phosphorous acid, wherein the bottom of the jacket is provided with a steam inlet and a condensate outlet, and the upper side of the jacket is provided with a steam outlet.

[0008] Preferably, the present invention provides a dripping tank for the production of phosphorous acid, wherein the upper surface of the tank cover is further provided with a thermometer port, a pressure gauge port, a level gauge port and a viewing port.

[0009] Preferably, the present invention provides a dripping tank for the production of phosphorous acid, wherein the annular cleaning tube is welded to the lower surface of the tank cover.

[0010] Compared with the prior art, the beneficial effects of this utility model are: The tank is equipped with a jacket on the outside and a circular cleaning pipe on the lower surface of the tank cover. Several nozzles are arranged around the circular cleaning pipe. The inner wall of the tank can be quickly rinsed by the combination of the circular cleaning pipe and the nozzles. At the same time, the jacket and high-temperature steam are used to quickly dry the inside of the tank, thereby reducing the waiting time for drying and improving the overall production efficiency of phosphorous acid. Furthermore, a single vent can be used to vent nitrogen and air during use and water vapor can be discharged during cleaning. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of a circular cleaning tube structure; Figure 3 This is a schematic diagram of the can lid's structure viewed from below.

[0012] In the diagram: 1. Tank body; 2. Tank cover; 3. Nitrogen inlet; 4. Gas outlet; 5. Circular cleaning pipe; 6. Sleeve; 7. Nozzle; 8. Water inlet; 9. Feed inlet; 10. Jacket; 11. Discharge outlet; 12. Support; 13. Steam inlet; 14. Condensate drain; 15. Steam outlet; 16. Thermometer port; 17. Pressure gauge port; 18. Level gauge port; 19. Visual port. Detailed Implementation

[0013] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0014] Please see Figure 1-3This utility model provides a technical solution: a dripping tank for phosphorous acid production, comprising a tank body 1 and a tank cover 2. The tank cover 2 is provided on the upper surface of the tank body 1, and a nitrogen inlet 3 and an outlet 4 are provided on the upper surface of the tank cover 2. The upper surface of the tank cover 2 is also provided with a thermometer port 16, a pressure gauge port 17, a level gauge port 18, and a viewing port 19. The thermometer port 16 is used to install a thermometer to monitor the temperature inside the tank body 1, the pressure gauge port 17 is used to install a pressure gauge to monitor the pressure inside the tank body 1, the level gauge port 18 is used to install a pressure gauge to monitor the pressure inside the tank body 1, and the viewing port 19 is used to view the real-time situation inside the tank body 1. A circular cleaning tube 5 is provided on the lower surface of the tank cover 2, and the circular cleaning tube 5 is welded to the lower surface of the tank cover 2 to achieve circular cleaning. The connection between pipe 5 and tank cover 2 is as follows: the outer surface of the annular cleaning pipe 5 is provided with several sleeves 6, each sleeve 6 is provided with a nozzle 7, the upper surface of the annular cleaning pipe 5 is provided with a water inlet 8, the water inlet 8 passes through the tank cover 2 and is connected to the tank cover 2, the center of the tank cover 2 is provided with a feed inlet 9, the tank body 1 is wrapped with a jacket 10, the outer surface of the jacket 10 is provided with several supports 12 to achieve overall support and fixation, the bottom of the jacket 10 is provided with a steam inlet 13 and a condensate outlet 14, the upper side of the jacket 10 is provided with a steam outlet 15, the steam inlet 13 and the steam outlet 15 are used for high temperature steam to enter and leave the jacket 10 respectively, the condensate outlet 14 is used for the discharge of condensate in the jacket 10, and the bottom of the tank body 1 is provided with a discharge port 11.

[0015] Installation method and operating principle: Make a hole on the upper surface of the annular cleaning pipe 5 and weld the water inlet 8. Make a hole at the downward angle on the outer edge of the annular cleaning pipe 5 and weld the sleeve 6. Then install the nozzles at each sleeve 6. Next, pass the water inlet 8 through the corresponding position on the tank cover 2 and weld the annular cleaning pipe 5 to the lower surface of the tank cover 2. Simultaneously, weld the outer wall of the water inlet 8 to the tank cover 2 to ensure a tight seal. After lifting the tank cover 2, place it on top of the tank body 1 and secure the tank cover 2 and tank body 1 with bolts to complete the installation. Before use, the nitrogen inlet 3 is connected to the liquid nitrogen storage tank and vaporizer via a pipe and pump. The outlet 4 is connected to the exhaust pipe. This outlet 4 is mainly used for the discharge of nitrogen and water vapor. The water vapor is generated after cleaning and through high-temperature heat exchange in the jacket 10. The inlet 8 connects to the cleaning water supply pipe, the inlet 9 connects to the phosphorus trichloride storage tank via a pipe, the thermometer port 16 is fitted with a thermometer, the pressure port 17 with a pressure gauge, the level port 18 with a level gauge, and the outlet 11 connects to the hydrolysis reactor for phosphorous acid production via a valve, flow meter, and tee. During operation, phosphorus trichloride is added to tank 1 through inlet 9, nitrogen is introduced to purge air, and outlet 4 and nitrogen inlet 3 are closed, awaiting use. When phosphorus trichloride in tank 1 is added to the hydrolysis reactor, the tee between the dripping tank and the reactor is switched to a water path. Water enters the annular cleaning pipe 5 through inlet 8 and is sprayed from various nozzles to clean the inner wall of tank 1. High-temperature steam is then introduced into the jacket 10 to heat the inside of tank 1. The water adhering to the inner wall of tank 1 turns into steam and is discharged from outlet 4 at the top. After drying, the next addition of phosphorus trichloride is performed. This utility model has a reasonable structure. The tank body 1 is provided with a jacket 10 on the outside, and the lower surface of the tank cover 2 is provided with a circular cleaning pipe 5. Several nozzles are provided around the circular cleaning pipe 5. The inner wall of the tank body 1 can be quickly rinsed by the cooperation of the circular cleaning pipe 5 and the nozzles. At the same time, the jacket 10 and high-temperature steam are used to quickly dry the inside of the tank body 1, thereby reducing the waiting time for drying and improving the overall production efficiency of phosphorous acid. Furthermore, the use of a single air outlet 4 can realize the venting of nitrogen and air during use, and water vapor can also be discharged during cleaning.

[0016] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0017] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dropping tank for phosphorous acid production, characterized in that: The tank includes a tank body (1) and a tank cover (2). The tank body (1) is provided with a tank cover (2) on its upper surface. The tank cover (2) is provided with a nitrogen inlet (3) and an outlet (4) on its upper surface. The tank cover (2) is provided with a circular cleaning pipe (5) on its lower surface. The circular cleaning pipe (5) is provided with several sleeves (6) on its outer surface. Each sleeve (6) is provided with a nozzle (7). The circular cleaning pipe (5) is provided with a water inlet (8) on its upper surface. The water inlet (8) passes through the tank cover (2) and is connected to the tank cover (2). The center of the tank cover (2) is provided with a feed inlet (9). The tank body (1) is wrapped with a jacket (10). The bottom of the tank body (1) is provided with a discharge outlet (11).

2. The dropping tank for phosphorous acid production according to claim 1, characterized in that: The outer surface of the jacket (10) is provided with several supports (12).

3. The dropping tank for phosphorous acid production according to claim 1, characterized in that: The jacket (10) is provided with a steam inlet (13) and a condensate outlet (14) at the bottom, and a steam outlet (15) is provided on one side of the upper part of the jacket (10).

4. The dropping tank for phosphorous acid production according to claim 1, characterized in that: The upper surface of the tank cover (2) is also provided with a thermometer port (16), a pressure gauge port (17), a level gauge port (18) and a viewing port (19).

5. A dropping tank for phosphorous acid production according to claim 1, characterized in that: The annular cleaning tube (5) is welded to the lower surface of the can lid (2).

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