Bisphenol A centrifugal granulation nozzle airlock cabin

Abstract

The utility model provides a bisphenol A centrifugal granulation nozzle airlock cabin, a bisphenol A centrifugal granulation tower comprises an operation room and a granulation cabin which are isolated by a tower plate, and the airlock cabin is arranged below the operation room and comprises a cabin body, an upper cabin door, a lower cabin door and a filler sealing assembly; the upper cabin door is used for penetrating through the granulation spray head main shaft sleeve and the feeding pipe and can move up and down on the granulation spray head main shaft and the feeding pipe; the filler sealing assembly is mounted between the upper cabin door and the granulation spray head main shaft sleeve and between the upper cabin door and the input pipe to ensure that the main shaft is sealed with the feeding pipe and the upper cabin door when the upper cabin door moves; and the upper cabin door and the lower cabin door are not opened at the same time, so that at least one of the operation room and the granulation tower is sealed when the bisphenol A centrifugal granulation nozzle is at any station, and no nitrogen overflows to the operation room.

Description

Technical Field

[0001] The utility model relates to the field of bisphenol A rotary nozzle granulation. For a centrifugal nozzle granulation system using nitrogen circulation cooling, an air lock cabin is used to solve the nitrogen leakage problem in the granulation tower during nozzle replacement. Background Art

[0002] In the nitrogen circulation-cooled rotary nozzle granulation system, the granulation tower operates at a slightly positive pressure. The rotary nozzle extends into the granulation tower. Under the action of centrifugal force, the bisphenol A molten liquid in the nozzle is thrown out from the side wall of the nozzle and breaks into droplets. In the tower, it exchanges heat in countercurrent with the rising nitrogen, cools and solidifies into solid particles, and falls to the bottom of the tower. The rotary nozzle feed pipe is equipped with a sealing cover, and a sealing gasket is installed between the cover and the tower plate to ensure that the granulation tower is sealed after the rotary nozzle is in place. When replacing the nozzle, the lifting motor starts, the rotary nozzle is lifted, and the nitrogen in the tower overflows into the operating room, posing a safety hazard. The previous solution was to install an axial flow fan at the top of the tower. When replacing the rotary nozzle, the axial flow fan is turned on for ventilation to ensure the oxygen content in the operating room. Utility Model Content

[0003] The technical problem solved by the utility model is to overcome the deficiencies of the prior art and provide an air lock cabin with a simple structure, convenient operation and leakage-free replacement of centrifugal granulation nozzles.

[0004] The technical solution of the utility model is: an airlock cabin for a bisphenol A centrifugal granulation nozzle, a bisphenol A centrifugal granulation tower including an operating room and a granulation cabin separated by tower plates, the airlock cabin being arranged below the operating room, including a cabin body, an upper cabin door, a lower cabin door and a packing seal assembly; the upper cabin door is used to pass through a main shaft sleeve and a feed pipe of the granulation nozzle and can move up and down the main shaft and the feed pipe of the granulation nozzle, the packing seal assembly is installed between the upper cabin door and the main shaft sleeve of the granulation nozzle, the upper cabin door and the input pipe to ensure that the main shaft, the feed pipe and the upper cabin door are sealed when the upper cabin door moves; the upper cabin door and the lower cabin door are not opened at the same time, ensuring that the bisphenol A centrifugal granulation nozzle is in any working position, there is at least one seal between the operating room and the granulation tower, and no nitrogen gas overflows into the operating room.

[0005] Preferably, the cabin body passes through the tower plate, the upper end of the cabin body is flush with the upper end of the tower plate, and the lower end of the cabin body is provided with a lower cabin door in the granulation cabin.

[0006] Preferably, it includes a cover plate welded on the main shaft sleeve. When the centrifugal nozzle is in the granulation position, the granulation nozzle installed on the main shaft extends into the granulation cabin of the granulation tower, and the lower hatch is in an open state. The cover plate presses the opening of the lower hatch, and the upper hatch of the airlock cabin presses the upper surface of the tower plate. The working chamber of the granulation tower and the operating room are isolated by two seals.

[0007] Preferably, the granulation nozzle must stop when passing through the airlock cabin regardless of whether it rises or falls; when the granulation nozzle rises, the upper hatch is closed and the lower hatch is opened. After the granulation nozzle rises into the airlock cabin, the lower hatch is closed first and then the upper hatch is opened; when the granulation nozzle descends, the upper hatch is opened and the lower hatch is closed. After the granulation nozzle descends to the airlock cabin, the upper hatch is closed and then the lower hatch is opened.

[0008] Preferably, when the granulation nozzle is in the maintenance and replacement station, the granulation nozzle is in the operation room, at this time the upper hatch is in the open state, the lower hatch is closed, and the closed lower hatch is relied on to achieve sealing isolation between the operation room and the granulation cabin.

[0009] Preferably, the packing seal assembly is made of a non-metallic material that is resistant to at least 200°C.

[0010] The beneficial effects of the present invention compared with the prior art are as follows: the present invention provides an airlock cabin, which is an isolation chamber arranged between the granulation tower and the tower top operating room. For a bisphenol granulation tower operating at a slightly positive pressure, when replacing the nozzle, the nozzle is not directly placed into the granulation tower from the operating room or lifted from the granulation tower to the operating room, but first stays in the airlock cabin. The upper and lower doors of the airlock cabin are not opened at the same time, ensuring that the granulation tower and the operating room can be in an isolated state under any working conditions. By adopting the airlock cabin, the nitrogen in the granulation tower will not overflow into the operating room and cause safety hazards. The utility model is suitable for a bisphenol A centrifugal nozzle granulation system with nitrogen circulation cooling, which can not only realize the rapid replacement of the granulation nozzle, but also ensure the sealing between the granulation tower and the operating room, and will not cause additional nitrogen consumption and a decrease in the oxygen content in the operating room due to the replacement of the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a simplified structural diagram of the airlock cabin of the centrifugal granulation nozzle of bisphenol A in the utility model (Example 1, the nozzle is located in the granulation tower);

[0012] Figure 2 This is a simplified structural diagram of the airlock cabin of the centrifugal granulation nozzle of bisphenol A in the utility model (Example 2, the nozzle is located in the airlock cabin);

[0013] Figure 3 This is a simplified structural diagram of the airlock cabin of the centrifugal granulation nozzle of bisphenol A in the utility model (Example 3, the nozzle is located in the operating room);

[0014] In the above figure, 1 is the centrifugal granulation nozzle, 2 is the lower hatch, 3 is the cabin body, 4 is the feed pipe, 5 is the tower plate, 6 is the upper hatch; 7 is the packing seal assembly, 8 is the granulation nozzle main shaft assembly, 9 is the lifting mechanism, and 10 is the cover plate. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the embodiments.

[0016] The utility model provides an air lock cabin which has a simple structure and can realize quick replacement of a rotary nozzle without leakage, and has important practical value in the field of bisphenol A centrifugal nozzle granulation.

[0017] The bisphenol A centrifugal granulation tower involved in the utility model includes an operating room and a granulation cabin separated by tower plates, the tower plates 5 have a certain thickness, and the airlock cabin is arranged below the operating room, including a cabin body 3, an upper cabin door 6, a lower cabin door 3 and a packing sealing assembly 7; the cabin body passes through the tower plates 5, the upper end of the cabin body is flush with the upper end of the tower plates, and the lower end of the cabin body is installed with the lower cabin door in the granulation cabin.

[0018] The main shaft sleeve and the input pipe (also called the feed pipe) 4 of the granulation nozzle 1 pass through the upper hatch 6 and are sealed with a packing seal assembly 7. The upper hatch 6 can move up and down on the main shaft sleeve and the feed pipe of the granulation nozzle. The packing seal assembly 7 ensures that the main shaft sleeve, the feed pipe and the upper hatch are sealed when the upper hatch moves. The upper hatch 6 and the lower hatch 2 are not opened at the same time, ensuring that at any workstation of the bisphenol A centrifugal granulation nozzle, there is at least one seal between the operating room and the granulation tower, and no nitrogen leaks into the operating room.

[0019] See also Figure 1 In this example, the centrifugal nozzle is in the granulation position. The granulation nozzle 1, mounted on the main shaft, extends into the granulation chamber of the granulation tower. The lower hatch 2 of the airlock is open. The cover plate 10 welded to the main shaft sleeve presses against the opening of the lower hatch 2 of the airlock. The upper hatch 6 of the airlock presses against the upper surface of the tower plate 5. The working chamber of the granulation tower is isolated from the operating room by two seals.

[0020] Whether ascending or descending, the centrifugal granulation nozzle must stop while passing through the airlock. When the granulation nozzle 1 is ascending, the upper hatch 6 is closed and the lower hatch 2 is opened. After the granulation nozzle enters the airlock, the lower hatch is closed first, then the upper hatch is opened, and the granulation nozzle continues to ascend. When the granulation nozzle 1 is descending, the upper hatch 6 is opened and the lower hatch 2 is closed. The granulation nozzle descends into the airlock. After the upper hatch is closed, the lower hatch is opened, and the granulation nozzle continues to descend. During the ascent and descent of the granulation nozzle, the upper hatch is sealed with packing between the granulation nozzle main shaft sleeve and the feed pipe.

[0021] See also Figure 2 In this example, the lifting mechanism 9 drives the granulation nozzle main shaft assembly 8 (including the two-stage sleeve and the main shaft within the sleeve, and the second-stage main shaft sleeve welded cover plate 10) upward. The granulation nozzle 1 is raised into the airlock chamber, and the lower hatch 2 is closed. At this time, the upper hatch 6 remains stationary, pressing against the upper surface of the tower plate 5. The packing seal assembly 7 ensures no leakage between the granulation nozzle main shaft assembly 5, the feed pipe 4, and the upper hatch 6. In Example 2, the airlock chamber is isolated from the operating room and the granulation tower workspace.

[0022] See also Figure 3In this example, the granulation nozzle is in the maintenance and replacement station. The lifting mechanism 9 drives the granulation nozzle main shaft assembly 8 and the upper hatch 6 to rise together. At this time, the granulation nozzle is in the operation room, the upper hatch 6 is open, and the lower hatch 2 is closed. The nitrogen in the granulation tower will not overflow into the operation room. The granulation nozzle 1 is raised to the maintenance station, where it can be maintained and replaced.

[0023] In a preferred embodiment of the present invention, the packing seal assembly 7 can be made of a non-metallic material that can withstand at least 200° C., such as rubber.

[0024] Although the present invention has been disclosed above in terms of preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art may, without departing from the spirit and scope of the present invention, make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and technical contents disclosed above. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

Claims

1. A bisphenol A centrifugal granulation nozzle airlock cabin, the bisphenol A centrifugal granulation tower includes an operating room and a granulation cabin separated by tower plates, characterized in that: The airlock cabin is arranged below the operating room, and includes a cabin body, an upper cabin door, a lower cabin door and a packing seal assembly; the upper cabin door is used to pass through the granulation nozzle main shaft sleeve and the feed pipe and can move up and down the granulation nozzle main shaft and the feed pipe, and the packing seal assembly is installed between the upper cabin door and the granulation nozzle main shaft sleeve, the upper cabin door and the input pipe to ensure that the main shaft and the feed pipe, and the upper cabin door are sealed when the upper cabin door moves; the upper cabin door and the lower cabin door are not opened at the same time, ensuring that at any work position of the bisphenol A centrifugal granulation nozzle, there is at least one seal between the operating room and the granulation tower, and no nitrogen gas overflows into the operating room.

2. The airlock according to claim 1, characterized in that: The cabin body passes through the tower plate, the upper end of the cabin body is flush with the upper end of the tower plate, and the lower end of the cabin body is provided with a lower cabin door in the granulation cabin.

3. The airlock according to claim 1, characterized in that: It includes a cover plate welded on the main shaft sleeve. When the centrifugal nozzle is in the granulation position, the granulation nozzle installed on the main shaft extends into the granulation cabin of the granulation tower, and the lower hatch is in the open state. The cover plate presses the opening of the lower hatch, and the upper hatch of the air lock cabin presses the upper surface of the tower plate. The working chamber of the granulation tower and the operating room are isolated by two seals.

4. The airlock according to claim 1, characterized in that: The granulation nozzle must stop when passing through the airlock cabin regardless of whether it is rising or falling; when the granulation nozzle rises, the upper hatch is closed and the lower hatch is opened. After the granulation nozzle is raised into the airlock cabin, the lower hatch is closed first and then the upper hatch is opened; when the granulation nozzle descends, the upper hatch is opened and the lower hatch is closed. After the granulation nozzle descends to the airlock cabin, the upper hatch is closed and then the lower hatch is opened.

5. The airlock according to claim 1, characterized in that: When the granulating nozzle is in the maintenance and replacement station, the granulating nozzle is in the operation room. At this time, the upper hatch is in the open state and the lower hatch is closed. The closed lower hatch is used to achieve sealing isolation between the operation room and the granulating cabin.

6. The airlock according to claim 1, characterized in that: The packing seal assembly is made of non-metallic material that can withstand at least 200°C.

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