Quenched slag water vapor treatment device for yellow phosphorus electric furnace

Abstract

The utility model relates to the technical field of yellow phosphorus production post-treatment, in particular to a yellow phosphorus electric furnace quenched slag water vapor treatment device which comprises a slag vapor pipeline connected to the middle lower portion of a first heat exchange tower, and the top of the first heat exchange tower is connected to the middle lower portion of a second heat exchange tower through a pipeline. The top of the second heat exchange tower is connected to the lower portion of the wet type electric demister through a pipeline, the top of the wet type electric demister is connected to a tail gas fan through a pipeline, and the tail gas fan is emptied through a chimney. The slag steam treatment device has the advantages that slag steam treatment is carried out in a water circulation mode, water resources are saved, the slag steam treatment effect is good, and treated tail gas can be directly emptied after reaching the emission standard.

Description

Technical Field

[0001] The utility model relates to the technical field of post-processing of yellow phosphorus production, in particular to a water vapor treatment device for yellow phosphorus electric furnace quenching slag. Background Art

[0002] A large amount of water vapor will be generated during the water quenching process of yellow phosphorus electric furnace slag. Direct discharge will cause a large amount of water resources waste. The water vapor contains fluorine and phosphorus. Direct discharge will cause air pollution. The discharge of a large amount of water vapor will cause visual pollution. Summary of the invention

[0003] In view of the problem that the water vapor generated in the slag quenching process contains fluorine and phosphorus, the utility model provides a yellow phosphorus electric furnace slag quenching water vapor treatment device, and its technical solution is: comprising a slag vapor pipeline connected to the lower middle part of a first heat exchange tower, the top of the first heat exchange tower is connected to the lower middle part of a second heat exchange tower through a pipeline, the top of the second heat exchange tower is connected to the lower part of a wet electric demisting tower through a pipeline, the top of the wet electric demisting tower is connected to an exhaust gas fan through a pipeline, and the exhaust gas fan is vented through a chimney.

[0004] The lower part of the first heat exchange tower is connected to the interior of the first circulation tank through a pipeline, the first circulation tank is connected to the first closed cooling tower through a first spray pump group, and the first closed cooling tower is connected to the spray pipe of the first heat exchange tower through a pipeline.

[0005] The lower part of the second heat exchange tower is connected to the inside of the second circulation tank through a pipeline, the second circulation tank is connected to the hot runner inlet of the plate heat exchanger through a second spray pump group, and the hot runner outlet of the plate heat exchanger is connected to the spray pipe of the second heat exchange tower.

[0006] The cold runner outlet of the plate heat exchanger is connected to a water tank, the water tank is connected to the hot runner inlet of the refrigeration unit, and the hot runner outlet of the refrigeration unit is connected to the cold runner inlet of the plate heat exchanger.

[0007] The cold runner outlet of the refrigerating unit is connected to the inlet of the second closed cooling tower, and the outlet of the second closed cooling tower is connected to the cold runner inlet of the refrigerating unit.

[0008] It is characterized in that the first circulation tank is connected to the second circulation tank through an overflow pipe to balance the water volume between the circulation tanks to avoid overflow.

[0009] A condensate storage tank is arranged at the bottom of the wet electric demisting device.

[0010] The first spray pump group is also connected to the slag flushing pool through a pipeline to discharge excess condensed water into the slag flushing pool, thereby recycling water resources.

[0011] Beneficial effects of the utility model:

[0012] This device uses water circulation to treat slag steam, which saves water resources and has a good slag steam treatment effect. The treated tail gas meets the emission standards and can be directly discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] In the figure: 1. first heat exchange tower; 2. second heat exchange tower; 3. wet electric demisting; 4. exhaust fan; 5. first circulation tank; 6. first spray pump group; 7. first closed cooling tower; 8. second circulation tank; 9. second spray pump group; 10. plate heat exchanger; 11. refrigeration unit; 12. water tank; 13. second closed cooling tower; 14. condensate storage tank; 15. slag steam pipeline; 16. overflow pipe. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below through the drawings and specific embodiments.

[0016] Example 1

[0017] A yellow phosphorus electric furnace slag quenching water vapor treatment device includes a slag steam pipeline 15 connected to the middle and lower part of a first heat exchange tower 1, the top of the first heat exchange tower 1 is connected to the middle and lower part of a second heat exchange tower 2 through a pipeline, the top of the second heat exchange tower 2 is connected to the lower part of a wet electric demisting precipitator 3 through a pipeline, the top of the wet electric demisting precipitator 3 is connected to an exhaust gas fan 4 through a pipeline, and the exhaust gas fan 4 is vented through a chimney.

[0018] The lower part of the first heat exchange tower 1 is connected to the interior of the first circulation tank 5 through a pipeline, the first circulation tank 5 is connected to the first closed cooling tower 7 through a first spray pump group 6, and the first closed cooling tower 7 is connected to the spray pipe of the first heat exchange tower 7 through a pipeline.

[0019] The lower part of the second heat exchange tower 2 is connected to the interior of the second circulation tank 8 through a pipe, and the second circulation tank 8 is connected to the hot runner inlet of the plate heat exchanger 10 through the second spray pump group 9, and the hot runner outlet of the plate heat exchanger 10 is connected to the spray pipe of the second heat exchange tower 2.

[0020] The cold runner outlet of the plate heat exchanger 10 is connected to the water tank 12, the water tank 12 is connected to the hot runner inlet of the refrigeration unit 11, and the hot runner outlet of the refrigeration unit 11 is connected to the cold runner inlet of the plate heat exchanger.

[0021] The cold runner outlet of the refrigerating unit 11 is connected to the inlet of the second closed cooling tower 13 , and the outlet of the second closed cooling tower 13 is connected to the cold runner inlet of the refrigerating unit 11 .

[0022] The first circulation tank 5 is connected to the second circulation tank 8 via an overflow pipe 16 .

[0023] A condensate storage tank 14 is provided at the bottom of the wet electric mist remover 3 .

[0024] The first spray pump group 6 is also connected to the slag flushing pool through a pipeline.

[0025] Example 2

[0026] The device described in Example 1 is used, and its operation process is as follows: the slag steam pipeline 15 transports the high-temperature slag steam to the first heat exchange tower 1, and the slag steam is initially cooled and washed by spray cooling and water washing. The spray water and condensed water are recycled through the first circulation tank 5, the first spray pump group 6 and the first closed cooling tower 7. After the first step of treatment, the slag steam continues to enter the second heat exchange tower 2 for the second cooling and water washing. The spray water and condensed water are recycled through the second circulation tank 8, the second spray pump group 9 and the plate heat exchanger 10. The chilled water in the cold flow channel of the plate heat exchanger 10 is recycled through the water tank 12, the refrigeration unit 11 and the second closed cooling tower 13. The water level between the first circulation tank 5 and the second circulation tank 8 is balanced by the overflow pipe 16. The excess condensed water is discharged to the slag flushing pool through the first spray pump group 6 for further recycling. The slag steam after the secondary treatment is further dehumidified by the wet electric demisting 3, and then discharged to the outside of the chimney through the exhaust fan 4.

Claims

1. A yellow phosphorus electric furnace slag quenching water vapor treatment device, It is characterized in that The invention comprises a slag steam pipeline (15) connected to the middle and lower part of a first heat exchange tower (1), the top of the first heat exchange tower (1) is connected to the middle and lower part of a second heat exchange tower (2) through a pipeline, the top of the second heat exchange tower (2) is connected to the lower part of a wet electric demisting device (3) through a pipeline, the top of the wet electric demisting device (3) is connected to an exhaust gas fan (4) through a pipeline, and the exhaust gas fan (4) is discharged through a chimney; The lower part of the first heat exchange tower (1) is connected to the interior of the first circulation tank (5) through a pipeline, the first circulation tank (5) is connected to the first closed cooling tower (7) through a first spray pump group (6), and the first closed cooling tower (7) is connected to the spray pipe of the first heat exchange tower (1) through a pipeline; The lower part of the second heat exchange tower (2) is connected to the interior of the second circulation tank (8) through a pipeline, the second circulation tank (8) is connected to the hot runner inlet of the plate heat exchanger (10) through a second spray pump group (9), and the hot runner outlet of the plate heat exchanger (10) is connected to the spray pipe of the second heat exchange tower (2).

2. A yellow phosphorus electric furnace slag quenching steam treatment device according to claim 1, It is characterized in that The cold runner outlet of the plate heat exchanger (10) is connected to the water tank (12), the water tank (12) is connected to the hot runner inlet of the refrigeration unit (11), and the hot runner outlet of the refrigeration unit (11) is connected to the cold runner inlet of the plate heat exchanger.

3. A yellow phosphorus electric furnace quenching slag water vapor treatment device according to claim 2, It is characterized in that The cold flow channel outlet of the refrigeration unit (11) is connected to the inlet of the second closed cooling tower (13), and the outlet of the second closed cooling tower (13) is connected to the cold flow channel inlet of the refrigeration unit (11).

4. A yellow phosphorus electric furnace quenching slag water vapor treatment device according to claim 1, It is characterized in that The first circulation tank (5) is connected to the second circulation tank (8) via an overflow pipe (16).

5. A yellow phosphorus electric furnace quenching slag water vapor treatment device according to claim 1, It is characterized in that A condensate storage tank (14) is provided at the bottom of the wet electric demisting device (3).

6. A yellow phosphorus electric furnace quenching slag water vapor treatment device according to claim 1, It is characterized in that The first spray pump group (6) is also connected to the slag flushing pool through a pipeline.

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