Evaporator for extracting phosphorus from phosphorus sludge

Abstract

The utility model relates to the technical field of phosphorus extraction from phosphorus sludge, and discloses an evaporator for phosphorus extraction from phosphorus sludge, which comprises a base, support frames are arranged on the front side and the rear side of the upper end face of the base, the four support frames are distributed in a rectangular array, an evaporation box is mounted on the upper side walls of the four support frames, and a radiator is mounted on the upper side wall of the evaporation box. A temperature sensor is installed on the other side of the lower end face of the upper side wall of the evaporation box, a conveying pipeline is installed on the lower side of the middle of the evaporation box, a heating lining plate is installed on the outer side wall of the conveying pipeline and located in the evaporation box, and a conveying screw is installed on the inner side wall of the conveying pipeline and close to the middle. According to the utility model, the other end of the conveying pipeline is connected with the mud-gas separator in a penetrating manner, after mud and phosphating gas suspending in the conveying pipeline enter the mud-gas separator, gas-liquid flow is dispersed through rotation in the conical separator, and evaporated mud impurities and phosphating gas are separated, so that phosphating gas with higher precision is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of phosphorus extraction from phosphorus sludge, in particular to an evaporator for phosphorus extraction from phosphorus sludge. Background Art

[0002] Phosphorus sludge is an impurity produced during the production of yellow phosphorus. However, the phosphorus sludge also contains about 8% of yellow phosphorus. Therefore, in order not to waste resources, related technologies such as extracting phosphorus from phosphorus sludge have been developed.

[0003] Currently, the most commonly used methods are to prepare phosphoric acid and to extract phosphorus by evaporation. The preparation of phosphoric acid is not easy to transport, which places a great burden on enterprises. The evaporation of phosphorus extracts phosphorus by gasification through continuous heating. However, the existing equipment is easy to contact with air after the phosphorus is extracted to produce phosphorus pentoxide, thereby reducing the extraction accuracy. Therefore, the technicians in this field provide a phosphorus sludge phosphorus extraction evaporator to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a phosphorus sludge phosphorus extraction evaporator is proposed. The other end of the conveying pipeline is connected through a mud gas separator. When mud and phosphating gas suspended in the conveying pipeline enter the mud gas separator, the gas-liquid flow is dispersed by rotating in the conical separator to reduce mud and gas carryover. After the mud and gas are separated by the separation plate, the phosphating gas is led upward through the exhaust pipe, enters the cooling box through the exhaust pipe, and is gradually converted from gas to liquid after cooling. Finally, the extracted pure phosphorus liquid is collected in a liquid storage tank. When the phosphating gas is completely converted into liquid, the air in the liquid storage tank can be pumped away by a second vacuum pump to form a sealed environment, thereby improving the accuracy of the extracted phosphating liquid.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a phosphorus sludge phosphorus extraction evaporator, comprising a base, support frames are arranged on both sides of the front and rear sides of the upper end surface of the base, four of the support frames are distributed in a rectangular array, an evaporation box is installed on the upper side walls of the four support frames, a radiator is installed on the upper side wall of the evaporation box, a temperature sensor is installed on the other side of the lower end surface of the upper side wall of the evaporation box, a conveying pipe is installed on the lower side of the middle of the evaporation box, a heating lining is installed on the outer side wall of the conveying pipe and inside the evaporation box, one end of the conveying pipe is connected to a motor, and a feed port is installed on one side of the upper side wall of the conveying pipe;

[0006] Through the above technical solution, the phosphorus sludge enters the evaporation box from the feed inlet for evaporation and phosphorus extraction, and the heating liner can continuously increase the temperature until the phosphorus in the phosphorus sludge is converted into gaseous state.

[0007] Furthermore, an output end transmission rod is connected to the movable end of the motor, and a conveying screw is connected to the other end of the output end transmission rod;

[0008] Through the above technical solution, the movable end of the motor drives the output end transmission rod to rotate slowly, and the output end transmission rod drives the conveying screw to rotate slowly, so that the phosphorus mud slowly rotates forward inside the conveying pipe to make the heating more uniform.

[0009] Furthermore, the output end of the conveying pipeline is connected with a mud-gas pipeline, and the mud-gas pipeline is penetrated and connected with a mud-gas separator;

[0010] Through the above technical solution, the evaporated phosphorus mud enters the mud-gas separator through the mud-gas pipeline for mud-gas separation, thereby extracting phosphorus with higher precision.

[0011] Furthermore, an exhaust port is provided on the upper side wall of the mud-gas separator, an exhaust pipe is supported and installed in the middle of the inner side wall of the mud-gas separator, a conical separator is installed in the middle of the rear side wall of the exhaust pipe, a plurality of separation plates are staggeredly distributed on both sides of the middle of the inner side wall of the mud-gas separator, and a mud discharge port is provided in the middle of the lower side wall of the mud-gas separator;

[0012] Through the above technical scheme, after the phosphorus sludge enters the mud-gas separator, it rotates in the conical separator to separate the mud and gas, the phosphating gas is led to the exhaust port through the exhaust pipe, the phosphorus sludge is dispersed by the separation plate, and the sludge can be discharged through the mud discharge port.

[0013] Furthermore, an air extraction pipe is fixedly installed on the upper side wall of the mud discharge port, and a cooling box is installed on the other side wall of the air extraction pipe;

[0014] Through the above technical solution, the exhaust pipe transmits the phosphating gas to the cooling box for cooling. After cooling, the phosphating gas is gradually converted into liquid, which is convenient for staff to collect.

[0015] Furthermore, a first vacuum pump is installed at a middle position of one side wall of the cooling box, and a conveying screw is connected to the other end of the output end transmission rod;

[0016] Through the above technical solution, the first vacuum pump can draw the phosphating gas into the vacuum pipe.

[0017] Furthermore, a condensation area is installed on the other side wall of the first vacuum pump, a plurality of condensation pipes are arranged at the middle position of the inner side wall of the condensation area, a second vacuum pump is installed on the other side wall of the condensation area, drainage plates are installed on both sides of the upper end surface of the bottom of the condensation area, a drainage port is opened between the two drainage plates, and a liquid storage tank is arranged on the lower side wall of the drainage port;

[0018] Through the above technical solution, the phosphated gas flows toward the condenser under the action of the second vacuum pump, so that the phosphated gas is gradually converted into liquid, and stored in the liquid storage tank through the drainage plate. When the phosphated gas is completely converted into liquid, the second vacuum pump extracts the air in the condensation area, thereby forming a sealed environment to prevent the phosphated liquid from being mixed with air during storage to form phosphorus pentoxide, resulting in reduced phosphorus accuracy.

[0019] Furthermore, a water tank is provided on the rear side wall of the condensation zone;

[0020] Through the above technical solution, the water tank can cool and dissipate heat for the condensation area.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, a mud-gas separator is provided to separate the evaporated muddy impurities and the phosphating gas, thereby obtaining the phosphating gas with higher precision.

[0023] 2. In the utility model, a cooling box is provided. The gas after phosphating is gradually converted from gas to liquid after being cooled by the condenser and collected in the liquid outlet box. After all the conversions are completed, the air in the box is pumped out by the second vacuum pump to prevent the liquid after phosphating from contacting the air and becoming phosphorus pentoxide, thereby reducing the accuracy of phosphorus.

[0024] 3. In the present invention, a temperature sensor is provided in the heating box, and the staff can record the parameters of the evaporation phosphating reaction according to the real-time temperature in the heating box. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front cross-sectional view of a phosphorus sludge phosphorus extraction evaporator proposed in the utility model;

[0026] Figure 2 This is a stereoscopic diagram of a phosphorus sludge phosphorus extraction evaporator proposed in the utility model;

[0027] Figure 3 This is a front view of a phosphorus sludge phosphorus extraction evaporator proposed by the utility model;

[0028] Figure 4 for Figure 1 A magnified schematic diagram of area A in the middle.

[0029] Legend:

[0030] 1. Base; 2. Support frame; 3. Output end transmission rod; 4. Motor; 5. Feed inlet; 6. Heating lining plate; 7. Radiator; 8. Evaporation box; 9. Temperature sensor; 10. Mud and gas pipeline; 11. Exhaust port; 12. Suction pipe; 13. First suction pump; 14. Water tank; 15. Condenser; 16. Cooling box; 17. Second suction pump; 18. Drain plate; 19. Drain port; 20. Liquid storage tank; 21. Mud and gas separator; 22. Mud discharge port; 23. Exhaust pipe; 24. Separation plate; 25. Conical separator; 27. Conveying screw; 28. Condensation area; 29. ​​Conveying pipeline. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1-4 The utility model provides an embodiment: a phosphorus sludge phosphorus extraction evaporator, comprising a base 1, support frames 2 are arranged on both sides of the front and rear sides of the upper end surface of the base 1, four support frames 2 are distributed in a rectangular array, and an evaporation box 8 is installed on the upper side walls of the four support frames 2. A radiator 7 is installed on the upper side wall of the evaporation box 8, and a temperature sensor 9 is installed on the other side of the lower end surface of the upper side wall of the evaporation box 8. A conveying pipe 29 is installed at the lower side of the middle of the evaporation box 8, and a heating lining 6 is installed on the outer side wall of the conveying pipe 29 and inside the evaporation box 8. One end of the conveying pipe 29 is connected to a motor 4, and a feed port 5 is installed on the upper side wall of the conveying pipe 29 at one side. The phosphorus sludge enters the evaporation box 8 from the feed port 5 for evaporation and phosphorus extraction. The heating lining 6 can continuously increase the temperature until 500 degrees to convert the phosphorus in the phosphorus sludge into a gaseous state.

[0033] The movable end of the motor 4 is connected to an output end transmission rod 3, and the other end of the output end transmission rod 3 is connected to a conveying screw 27. The movable end of the motor 4 drives the output end transmission rod 3 to rotate slowly, and the output end transmission rod 3 drives the conveying screw 27 to rotate slowly, so that the phosphorus mud slowly rotates and moves forward inside the conveying pipe 29 so that the heating is more uniform. The output end of the conveying pipe 29 is connected to a mud gas pipeline 10, and the mud gas pipeline 10 is connected to a mud gas separator 21 through it. The evaporated phosphorus mud enters the mud gas separator 21 through the mud gas pipeline 10 for mud gas separation, so as to extract phosphorus with higher precision. The upper side wall of the mud gas separator 21 is provided with an exhaust port 11, and the mud gas separator 21 is provided with an exhaust port 11. An exhaust pipe 23 is supported and installed at the upper middle position of the inner wall of the device 21, a conical separator 25 is installed at the upper middle position of the rear side wall of the exhaust pipe 23, a plurality of separation plates 24 are staggeredly distributed at both sides of the lower middle position of the inner wall of the mud-gas separator 21, a mud discharge port 22 is arranged at the middle position of the lower side wall of the mud-gas separator 21, after the phosphorus mud enters the mud-gas separator 21, it rotates in the conical separator 25 to separate the mud and gas, the phosphating gas is led to the exhaust port 11 through the exhaust pipe 23, the phosphorus mud is dispersed by the separation plate 24, and the sludge can be discharged through the mud discharge port 22, and an exhaust pipe 12 is fixedly installed on the upper side wall of the mud discharge port 22, and the exhaust pipe 12 A cooling box 16 is installed on the other side wall, and the exhaust pipe 12 transmits the phosphating gas to the cooling box 16 for cooling. After cooling, the phosphating gas is gradually converted into liquid, which is convenient for the staff to collect. A first exhaust pump 13 is installed near the middle of one side wall of the cooling box 16. The output end of the exhaust pipe 12 is connected to the first exhaust pump 13. The first exhaust pump 13 can extract the phosphating gas into the exhaust pipe 12. A condensation area 28 is installed on the other side wall of the first exhaust pump 13. A plurality of condensation pipes 15 are arranged near the middle of the inner side wall of the condensation area 28. A second exhaust pump 17 is installed on the other side wall of the condensation area 28. The bottom upper end surface of the condensation area 28 Drain plates 18 are installed at both sides, a drain port 19 is opened between the two drain plates 18, and a liquid storage tank 20 is arranged on the lower side wall of the drain port 19. The phosphating gas flows toward the condenser 15 under the action of the second vacuum pump 17, so that the phosphating gas is gradually converted into liquid, and stored in the liquid storage tank 20 through the drain plates 18. When the phosphating gas is completely converted into liquid, the second vacuum pump 17 extracts the air in the condensation area 28, thereby forming a sealed environment to prevent the phosphating liquid from being mixed with air during storage to form phosphorus pentoxide, resulting in reduced phosphorus accuracy. A water tank 14 is arranged on the rear side wall of the condensation area 28, and the water tank 14 can cool and dissipate heat for the condensation area 28.

[0034] Working principle: The phosphorus sludge is transported to the conveying pipe 29 through the feed port 5, the motor 4 drives the output end transmission rod 3 to rotate slowly, and the output end transmission rod 3 drives the conveying rod to rotate slowly. The phosphorus sludge slowly moves into the evaporation box 8 under the action of the conveying blade 26. When it is about to reach the other end of the evaporation box 8, the motor 4 stops running. At this time, the heating liner 6 starts to heat the phosphorus sludge. The real-time temperature in the evaporation box 8 can be checked through the temperature sensor 9. When the phosphorus sludge is heated to 500 degrees, the phosphorus in the phosphorus sludge is gasified and separated from other impurities such as sludge, and suspended in the conveying pipe 29. At this time, the motor 4 is turned on, and the phosphorus sludge continues to move through the mud-gas pipe 10 into the mud-gas separator 21. At this time, the cone separator 25 rotates to separate the phosphorus sludge. The gas-dispersed liquid flow reduces the carryover of mud gas, and then the separation plate 24 performs drip separation. The gas in the sludge is discharged through the exhaust pipe 23 and led to the exhaust port 11 through the pipeline. The sludge is discharged through the mud discharge port 11, and the phosphating gas enters the suction pipe 12 through the exhaust port 22. The phosphating gas is led to the cooling box 16 by the action of the first suction pump 13. At this time, the phosphating gas moves toward the condenser 15 under the action of the second suction pump 17, and is slowly converted into liquid through the gas under the action of cooling. Finally, the liquid is collected in the liquid storage tank 20 through the drainage plate 18. When the phosphating gas is completely converted into liquid, the air in the cooling box 16 and the liquid storage tank 20 is sucked away by the second suction pump 17, so as to extract purer phosphorus.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. 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 phosphorus sludge phosphorus extraction evaporator, comprising a base (1), characterized in that: Support frames (2) are provided on both sides of the upper end surface of the base (1) near the front side and the rear side, and four of the support frames (2) are distributed in a rectangular array. An evaporation box (8) is installed on the upper side walls of the four support frames (2), and a radiator (7) is installed on the upper side wall of the evaporation box (8). A temperature sensor (9) is installed on the other side of the lower end surface of the upper side wall of the evaporation box (8). A conveying pipe (29) is installed at a lower position in the middle of the evaporation box (8), and a heating lining plate (6) is installed on the outer side wall of the conveying pipe (29) and inside the evaporation box (8). One end of the conveying pipe (29) is connected to a motor (4), and a feed port (5) is installed on one side of the upper side wall of the conveying pipe (29).

2. The phosphorus sludge phosphorus extraction evaporator according to claim 1, characterized in that: An output end transmission rod (3) is connected to the movable end of the motor (4), and a conveying screw rod (27) is connected to the other end of the output end transmission rod (3).

3. The phosphorus sludge phosphorus extraction evaporator according to claim 1, characterized in that: The output end of the conveying pipeline (29) is connected to a mud-gas pipeline (10), and the mud-gas pipeline (10) is penetrated and connected to a mud-gas separator (21).

4. The phosphorus sludge phosphorus extraction evaporator according to claim 3, characterized in that: The upper side wall of the mud-gas separator (21) is provided with an exhaust port (11); an exhaust pipe (23) is supported and installed at the middle upper position of the inner side wall of the mud-gas separator (21); a conical separator (25) is installed at the middle upper position of the rear side wall of the exhaust pipe (23); a plurality of separation plates (24) are staggeredly distributed at both sides of the middle lower side of the inner side wall of the mud-gas separator (21); and a mud discharge port (22) is provided at the middle position of the lower side wall of the mud-gas separator (21).

5. The phosphorus sludge phosphorus extraction evaporator according to claim 4, characterized in that: An air extraction pipe (12) is fixedly mounted on the upper side wall of the mud discharge port (22), and a cooling box (16) is mounted on the other side wall of the air extraction pipe (12).

6. The phosphorus sludge phosphorus extraction evaporator according to claim 5, characterized in that: A first air pump (13) is installed at a middle position on one side wall of the cooling box (16), and an output end of the air pump (12) is connected to the first air pump (13).

7. The phosphorus sludge phosphorus extraction evaporator according to claim 6, characterized in that: A condensation area (28) is installed on the other side wall of the first vacuum pump (13), a plurality of condensation tubes (15) are arranged at a middle position on the inner side wall of the condensation area (28), a second vacuum pump (17) is installed on the other side wall of the condensation area (28), flow guide plates (18) are installed on both sides of the upper end surface of the bottom of the condensation area (28), a liquid discharge port (19) is provided between the two flow guide plates (18), and a liquid storage tank (20) is arranged on the lower side wall of the liquid discharge port (19).

8. The phosphorus sludge phosphorus extraction evaporator according to claim 7, characterized in that: A water tank (14) is provided on the rear side wall of the condensation zone (28).

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