Sealed discharging device of Mannheim furnace

Abstract

The sealed discharging device of the Mannheim furnace comprises a material pushing screw conveyor and a material pulling screw conveyor, the material pushing screw conveyor is installed in a downward inclined mode, the material pulling screw conveyor is installed in an upward inclined mode, and an outlet of the material pushing screw conveyor is connected with an inlet of the material pulling screw conveyor in a sealed mode. And the lowest point of the outlet of the material pulling screw conveyor is flush with the highest point of the outlet of the material pushing screw conveyor. Compared with the prior art, the cooling pusher is effectively sealed through the obliquely-mounted pushing screw conveyor and the obliquely-mounted pulling screw conveyor, so that cold air is effectively prevented from entering the reaction chamber in a micro-negative pressure state through the cooling pusher, and therefore, unorganized emission of hydrogen chloride gas is effectively avoided; and the problems of environment pollution, equipment plant corrosion and harm to the health of operators are solved. The device is simple in structure and convenient to operate. And compared with a traditional discharging device, the discharging device has good economic benefits and social benefits.

Description

Technical Field

[0001] The utility model relates to the technical field of potassium sulfate production devices, in particular to a sealed discharging device for a Mannheim furnace. Background Art

[0002] The Mannheim furnace is the most core equipment for the production of potassium sulfate by the Mannheim method. The Mannheim furnace mainly consists of three parts, namely, the combustion chamber in the upper part, the reaction chamber in the middle part, and the flue chamber in the lower part. Natural gas and preheated air burn in the combustion chamber and provide continuous heat required for the reaction to the reaction chamber through heat radiation, and are discharged from the reaction furnace through the flue chamber at the lower part of the furnace bed. The raw materials potassium chloride and concentrated sulfuric acid undergo a double decomposition reaction in the reaction chamber in the middle of the reaction furnace to generate potassium sulfate and hydrogen chloride gas. This reaction is an endothermic reaction, so the reaction chamber needs to be maintained at 500°C. Since hydrogen chloride gas is an acidic gas, it will become hydrochloric acid when it meets water, thus causing harm to the environment and the health of personnel, and having a strong corrosive effect on equipment. Therefore, the reaction chamber needs to be maintained under negative pressure operation. Since the Mannheim furnace is a continuous discharging production, if you want to maintain a slightly negative pressure operation, it is required that the Mannheim furnace and its auxiliary devices have good sealing performance to prevent cold air from entering the reaction chamber. There is an outlet on each side of the reaction chamber. The produced potassium sulfate enters the sealed cooling pusher from the outlet of the reaction furnace. The potassium sulfate is broken and cooled in the cooling pusher and then enters the finished product scraper conveyor, and is transported to the finished product process through the finished product scraper conveyor. Because the finished product scraper conveyor is not tightly sealed, under the state of slightly negative pressure in the reaction chamber, cold air can easily enter the cooling pusher through the finished product scraper conveyor, and then enter the reaction chamber under high temperature, causing the reaction chamber to change from a slightly negative pressure state to a slightly positive pressure state, thus resulting in the problem of unorganized emission of hydrogen chloride gas, polluting the environment, corroding equipment and workshops, and endangering the health of operators. Therefore, researching and developing a sealed discharging device for a Mannheim furnace to solve the problem of unorganized emission of hydrogen chloride gas is an important problem that our company urgently needs to solve. Summary of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides a sealed discharging device for a Mannheim furnace. The sealed discharging device is installed below the outlet of the cooling pusher and above the inlet of the finished product scraper conveyor. The double-screw conveyor is sealed by the produced potassium sulfate in the way of a double-screw conveyor, so as to avoid cold air from entering the cooling pusher and the reaction chamber, keep the reaction chamber in a slightly negative pressure state for production, and further solve the problem of unorganized emission of hydrogen chloride gas.

[0004] To achieve this technical purpose, the utility model adopts the following scheme:

[0005] A sealed discharging device for a Mannheim furnace, comprising a feeding screw conveyor and a pulling screw conveyor. The feeding screw conveyor is installed obliquely downward. The upper end of the feeding screw conveyor is provided with a feeding screw conveyor motor, the upper part is provided with a feeding screw conveyor inlet, and the lower end is provided with a feeding screw conveyor outlet. The pulling screw conveyor is installed obliquely upward. The lower end of the pulling screw conveyor is provided with a pulling screw conveyor inlet, the lower part is provided with a pulling screw conveyor outlet, and the upper end is provided with a pulling screw conveyor motor. The outlet of the feeding screw conveyor and the inlet of the pulling screw conveyor are hermetically connected, and the lowest point of the outlet of the pulling screw conveyor is higher than or equal to the highest point of the outlet of the feeding screw conveyor.

[0006] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0007] The present utility model effectively seals the cooling feeder through an obliquely installed feeding screw conveyor and an obliquely installed pulling screw conveyor, effectively preventing cold air from entering the reaction chamber in a slightly negative pressure state through the cooling feeder, thereby effectively avoiding the problem of unorganized emission of hydrogen chloride gas, which causes environmental pollution, corrosion of equipment workshops, and harm to the health of operating personnel. The structure of the present utility model is simple and the operation is convenient. Compared with the traditional discharging device, it has good economic and social benefits.

[0008] Further, the feeding screw conveyor is installed obliquely downward at an angle of 30°, and the pulling screw conveyor is installed obliquely upward at an angle of 30°.

[0009] Further, the inlet of the feeding screw conveyor is connected to a cooling feeder, and the outlet of the cooling feeder and the inlet of the feeding screw conveyor are hermetically connected through a connecting flange.

[0010] Further, the outlet of the pulling screw conveyor is connected to a finished product scraper conveyor, and the inlet of the finished product scraper conveyor is connected to the outlet of the pulling screw conveyor through a cloth bag flexible connection. Description of the Drawings

[0011] Figure 1 Schematic diagram of the sealed discharging device according to the embodiment of the present utility model;

[0012] The labels in the figure are: 1. Cooling feeder; 2. Outlet of the cooling feeder; 3. Connecting flange; 4. Feeding screw conveyor motor; 5. Inlet of the feeding screw conveyor; 6. Feeding screw conveyor; 7. Outlet of the feeding screw conveyor; 8. Pulling screw conveyor motor; 9. Pulling screw conveyor; 10. Inlet of the pulling screw conveyor; 11. Outlet of the pulling screw conveyor; 12. Cloth bag flexible connection; 13. Inlet of the finished product scraper conveyor. Detailed Embodiment

[0013] To fully understand the purpose, features, and effects of the present utility model, the following specific embodiments are used to describe the present utility model in detail. However, the present utility model is not limited thereto.

[0014] See Figure 1 , the present utility model provides a technical solution: a sealed discharging device for a Mannheim furnace, including a feeding screw conveyor 6 and a pulling screw conveyor 9. The feeding screw conveyor 6 is installed at a downward inclination angle of 30°. At the upper end of the feeding screw conveyor 6, there is a feeding screw conveyor motor 4. At the upper part of the feeding screw conveyor 6, there is a feeding screw conveyor inlet 5. The feeding screw conveyor inlet 5 is hermetically connected to the cooling feeding machine outlet 2 of the cooling feeding machine 1 through a connecting flange 3. At the lower end of the feeding screw conveyor 6, there is a feeding screw conveyor outlet 7. The pulling screw conveyor 9 is installed at an upward inclination angle of 30°. At the lower end of the pulling screw conveyor 9, there is a pulling screw conveyor inlet 10. The pulling screw conveyor inlet 10 is hermetically connected to the feeding screw conveyor outlet 7. At the lower part of the pulling screw conveyor 9, there is a pulling screw conveyor outlet 11. The lowest point of the pulling screw conveyor outlet 11 is higher than the highest point of the feeding screw conveyor outlet 7, or the lowest point of the pulling screw conveyor outlet 11 is flush with the highest point of the feeding screw conveyor outlet 7, ensuring that the space between the feeding screw conveyor outlet 7 and the pulling screw conveyor inlet 10 is filled with potassium sulfate finished products, thereby achieving the sealing of the discharging device. The pulling screw conveyor outlet 11 is connected to the finished product scraper inlet 13 through a cloth bag flexible connection 12. At the upper end of the pulling screw conveyor 9, there is a pulling screw conveyor motor 8.

[0015] The usage method of the present utility model is as follows:

[0016] The potassium sulfate finished products in the cooling feeding machine 1 are transported to the feeding screw conveyor inlet 5 through the cooling feeding machine outlet 2. The sealing between the cooling feeding machine outlet 2 and the feeding screw conveyor inlet 5 is ensured by the connecting flange 3. The potassium sulfate finished products enter the interior of the feeding screw conveyor 6 driven by the feeding screw conveyor motor 4 from the feeding screw conveyor inlet 5, and the potassium sulfate finished products are continuously transported to the feeding screw conveyor outlet 7 through the feeding screw conveyor 6. The feeding screw conveyor outlet 7 and the pulling screw conveyor inlet 10 are connected by welding. The potassium sulfate finished products enter the interior of the pulling screw conveyor 9 driven by the pulling screw conveyor motor 8 from the pulling screw conveyor inlet 10, and the potassium sulfate finished products are continuously transported to the pulling screw conveyor outlet 11 through the pulling screw conveyor 9, and then enter the finished product scraper inlet 13 through the cloth bag flexible connection 12 and are transported to the finished product process.

[0017] Finally, it should be noted that: The above-listed are only the preferred embodiments of the present utility model. Of course, those skilled in the art can make changes and modifications to the present utility model. Provided that these modifications and variations fall within the scope of the claims of the present utility model and its equivalent technologies, they shall all be considered as the protection scope of the present utility model.

Claims

1. A sealed discharging device for a Mannheim furnace, comprising a push screw conveyor (6) and a pull screw conveyor (9), characterized in that: The push screw conveyor (6) is installed downwardly inclined, a push screw conveyor motor (4) is provided at the upper end of the push screw conveyor (6), a push screw conveyor inlet (5) is provided at the upper part, and a push screw conveyor outlet (7) is provided at the lower end; the pull screw conveyor (9) is installed upwardly inclined, a pull screw conveyor inlet (10) is provided at the lower end of the pull screw conveyor (9), a pull screw conveyor outlet (11) is provided at the lower part, and a pull screw conveyor motor (8) is provided at the upper end; the push screw conveyor outlet (7) and the pull screw conveyor inlet (10) are sealed and connected, and the lowest point of the pull screw conveyor outlet (11) is higher than or equal to the highest point of the push screw conveyor outlet (7).

2. The sealed discharging device for a Mannheim furnace according to claim 1, characterized in that: The push screw conveyor (6) is installed at a downward tilt of 30°, and the pull screw conveyor (9) is installed at an upward tilt of 30°.

3. The sealed discharging device for a Mannheim furnace according to claim 1, characterized in that: The pusher screw conveyor inlet (5) is connected to a cooling pusher (1), and the cooling pusher outlet (2) of the cooling pusher (1) is sealedly connected to the pusher screw conveyor inlet (5) via a connecting flange (3).

4. The sealed discharging device for a Mannheim furnace according to claim 1, characterized in that: The outlet (11) of the material pulling screw conveyor is connected to a finished product scraper, and the finished product scraper inlet (13) of the finished product scraper is connected to the outlet (11) of the material pulling screw conveyor through a bag flexible connection (12).

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