CN214222010U

CN214222010U - Sealing device of HF rotary reaction furnace

Info

Publication number: CN214222010U
Application number: CN202023095655.1U
Authority: CN
Inventors: 刘涛; 方良均; 童绍丰; 丛鑫鑫; 陈伦培
Original assignee: Jiangsu Sanmei Chemicals Co ltd
Current assignee: Jiangsu Sanmei Chemicals Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-09-17
Anticipated expiration: 2030-12-21

Abstract

A sealing device of an HF rotary reaction furnace comprises a sealing cylinder and a spiral shaft arranged in the sealing cylinder, wherein one end of the spiral shaft is rotatably connected with the sealing cylinder, and the other end of the spiral shaft penetrates through the sealing cylinder to be sequentially connected with a pin and a motor and is hermetically connected with a sealing shaft sleeve through a sealing assembly; the motor is connected with the pin through a coupling; a dynamic and static sealing device is arranged at one end, far away from the sealing assembly, of the sealing shaft sleeve, the dynamic and static sealing device comprises a dynamic sealing ring and a static sealing ring which are arranged on the sealing shaft sleeve, the dynamic sealing ring and the sealing shaft sleeve are sealed through a labyrinth sealing device, and the static sealing ring is fixedly arranged on the sealing shaft sleeve; a corrugated pipe compensator is arranged between the movable sealing ring and the static sealing ring, so that the problem of leakage of the HF furnace tail slag tapping spiral seal is solved through a sealing device, and the purposes of easiness in maintenance and reduction in production and shutdown are achieved.

Description

Sealing device of HF rotary reaction furnace

Technical Field

The utility model relates to the field of chemical industry, in particular to a sealing device of HF rotary reaction furnace.

Background

The rotary reaction furnace is main reaction equipment for producing hydrogen fluoride by a dry method and a wet method, and the fluorite and sulfuric acid react in the cylinder to generate hydrogen fluoride by adopting gear transmission and the cylinder rotates, and a large amount of calcium sulfate serving as a byproduct is generated at the same time. Because the reaction temperature is higher, generally above 300 ℃, part of unreacted sulfuric acid and hydrogen fluoride are clamped in by-products to form slag gas, a certain positive pressure is generated, when the slag gas passes through a slag spiral, a leakage phenomenon is generated, great harm is caused to the environment and the health of personnel, in order to ensure the sealing of the slag spiral, a labyrinth sealing system is adopted under the common condition, and the slag gas is sealed in the system through a composite straight-through labyrinth; however, calcium sulfate is easily bonded in the cavity, so that gas cannot complete the conversion of kinetic energy and heat energy through the cavity, the labyrinth is disabled, in addition, under the high-temperature condition, the bonded acidic substances on the calcium sulfate are easily reacted with the material of the sealing ring, the sealing ring is damaged, the labyrinth number is reduced, the slag gas leakage is caused, the production is forced to stop, the overhauling frequency is increased, and the normal production is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the current situation of the prior art, the technical problem to be solved by the present invention is to provide a sealing device for a HF rotary reaction furnace.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a sealing device of an HF rotary reaction furnace comprises a sealing cylinder and a spiral shaft arranged in the sealing cylinder, wherein one end of the spiral shaft is rotatably connected with the sealing cylinder, and the other end of the spiral shaft penetrates through the sealing cylinder to be sequentially connected with a pin and a motor and is hermetically connected with the sealing cylinder through a sealing assembly; the motor is connected with the pin through a coupling; the sealing assembly is characterized in that one end of the sealing barrel, which is far away from the sealing assembly, is provided with a static sealing device, the static sealing device comprises a movable sealing ring and a static sealing ring which are arranged on the sealing barrel, the movable sealing ring is sealed with the sealing barrel through a labyrinth sealing device, and the static sealing ring is fixedly arranged on the sealing barrel.

In one embodiment, a bellows compensator is disposed between the dynamic seal ring and the static seal ring.

In one embodiment, a guide rod is arranged between the movable sealing ring and the static sealing ring at the upper end of the sealing cylinder, one end of the guide rod penetrates through the movable sealing ring, and the other end of the guide rod is fixedly connected with the static sealing ring through a nut.

In one embodiment, a cylinder connecting rod is fixedly connected to one side, facing the static sealing ring, of the movable sealing ring at the lower end of the sealing cylinder; and an air cylinder is fixedly arranged on one side of the static sealing ring, which is far away from the dynamic sealing ring, and a piston rod of the air cylinder penetrates through the static sealing ring to be connected with the air cylinder connecting rod.

In one embodiment, the seal assembly comprises a seal shaft sleeve arranged on the screw shaft, and a first packing gland and a second packing gland which are arranged on the seal shaft sleeve, wherein the first packing gland and the second packing gland form a packing cavity on the seal shaft sleeve and are fixedly connected through bolts, and seal packing is arranged in the packing cavity.

In one embodiment, the seal assembly further includes a seal ring disposed on the second packing gland, and the seal ring is fixedly connected to the seal cartridge by bolts.

In one embodiment, the bearing assembly includes a bearing disposed between the screw shaft and the pin, a bearing seat disposed on the bearing, and bearing caps disposed on both sides of the bearing, wherein the bearing seat and the bearing caps are each connected to the bearing by bolts.

In one embodiment, a shaft sleeve is arranged between the bearing cover and the spiral shaft, and wool felt is arranged between the shaft sleeve and the bearing cover.

In one embodiment, a bearing support is fixedly arranged on one side of the sealing ring, and the bearing assembly is positioned on the bearing support.

In one embodiment, one end of the sealing cylinder is provided with a feeding hole, and the other end of the sealing cylinder is provided with a discharging hole.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a seal shaft sleeve keeps away from the one end of seal assembly and sets up sound sealing device, and sound sealing device including setting up move sealing ring and the static sealing ring on the sealed cylinder, move the sealing ring with the sealed cylinder is sealed through labyrinth seal device, the static sealing ring is fixed to be set up the sealed cylinder, wherein, be provided with the bellows compensator between move sealing ring and the static sealing ring; a guide rod is arranged between the movable sealing ring and the static sealing ring at the upper end of the sealing cylinder, one end of the guide rod penetrates through the movable sealing ring, and the other end of the guide rod is fixedly connected with the static sealing ring through a nut; a cylinder connecting rod is fixedly connected to one side, facing the static sealing ring, of the movable sealing ring at the lower end of the sealing cylinder; the side of the static sealing ring, which is far away from the dynamic sealing ring, is fixedly provided with an air cylinder, and a piston rod of the air cylinder penetrates through the static sealing ring to be connected with an air cylinder connecting rod), so that the elastic return force deformation caused by high-temperature deformation is changed into applying constant pressure by adding the air cylinder on the dynamic and static sealing device, and the leakage caused by elastic fatigue is effectively avoided; meanwhile, one end of the static sealing ring is welded on the sealing cylinder, and the movable sealing ring is combined with the corrugated compensator through the labyrinth sealing form of the labyrinth sealing device, so that the movable sealing ring is more flexible, and can be disassembled in a sealing manner without stopping; in addition, the sealing surface is changed from linear friction to surface friction through a mechanical sealing form, so that the sealing effect is more excellent.

2. The utility model discloses a move the sealing ring and pass through labyrinth seal device with sealed axle sleeve and seal to it is great to have solved the difference in temperature during the start-stop, causes bellows compensator shrink or expansion and makes the sealing ring take place to deform and lead to the problem of sealed inefficacy.

3. The utility model reduces single sealing damage through the combination of the labyrinth sealing device and the dynamic and static sealing devices, and forces the times of production halt maintenance, so that the maintenance is more planned and the maintenance is easier to be carried out;

4. the utility model discloses an increase the cylinder on the sound sealing device and make labyrinth seal device change face seal into by line seal, reduced the possibility of revealing, reduce HF stove tail simultaneously and slag tap spiral seal and reveal the problem, reach easily maintenance, reduce the purpose that the production was parkked

Drawings

Fig. 1 is a schematic structural diagram of the sealing device of the present invention.

Fig. 2 is a schematic structural view of the screw shaft passing through the sealing cylinder connecting pin and the motor in the sealing device of the present invention.

In the figure: 10. the sealing device comprises a sealing cylinder, 11, a dynamic sealing ring, 12, a static sealing ring, 13, a corrugated pipe compensator, 14, a guide rod, 15, a cylinder connecting rod, 16, a cylinder, 20, a spiral shaft, 21, a sealing shaft sleeve, 22, a first packing gland, 23, a second packing gland, 24, sealing packing, 25, a sealing ring, 30, a pin, 31, a bearing, 32, a bearing seat, 33, a bearing cover, 34, a shaft sleeve, 35, wool felt, 36, a bearing support, 40, a motor, 50 and a coupler.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. In the following description, feature details such as specific configurations and components are provided only to help a full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

The utility model provides a sealing device of an HF rotary reaction furnace.

As shown in fig. 1-2, a sealing device of an HF rotary reaction furnace comprises a sealing cylinder 10, a screw shaft 20 disposed in the sealing cylinder 10, wherein one end of the screw shaft 20 is rotatably connected with the sealing cylinder 10, and the other end thereof penetrates through the sealing cylinder 10 to be sequentially connected with a pin 30 and a motor 40 and is hermetically connected with the sealing cylinder 10 through a sealing assembly; wherein the pin 30 is connected with the spiral shaft 20 through a bearing assembly, and the motor 40 is connected with the pin 30 through a coupling 50; specifically, the seal assembly comprises a seal shaft sleeve 21 arranged on the screw shaft 20, a seal device arranged on the seal shaft sleeve 21, and a seal ring 25 arranged on the seal device, wherein the seal device comprises a packing seal device and a labyrinth seal device, the packing seal device comprises a first packing gland 22 and a second packing gland 23 arranged on the seal shaft sleeve 21, the first packing gland 22 and the second packing gland 23 form a packing cavity on the seal shaft sleeve 21 and are fixedly connected through bolts, and a seal packing 24 is arranged in the packing cavity; the sealing ring 25 is disposed on the second packing gland 23 and is fixedly connected with the sealing cylinder 10 through a bolt, so that the screw shaft 20 is sealed with the sealing cylinder 10 through a sealing assembly, and the screw shaft 20 rotates in the sealing cylinder 10 through the sealing assembly.

Further, the bearing assembly comprises a bearing 31 arranged between the screw shaft 20 and the pin 30, a bearing seat 32 arranged on the bearing 31, and a bearing cover 33 arranged on one side of the bearing 31, wherein the bearing seat 32 and the bearing cover 33 are both connected with the bearing 31 through bolts, a shaft sleeve 34 is arranged between the bearing cover 33 and the screw shaft 20, and wool felt 35 is arranged between the shaft sleeve 34 and the bearing cover 33, so that the pin 30 can synchronously rotate with the screw shaft 20 through the bearing 31, and the bearing 31 is supported and fixed through the bearing seat 32 and the bearing cover 33.

Further, a bearing support 36 is fixedly arranged on one side of the sealing ring 25, and the bearing seat 32 is fixed on the bearing support 36.

Further, one end of the sealing barrel 10, which is far away from the sealing assembly, is provided with a dynamic and static sealing device, the dynamic and static sealing device comprises a dynamic sealing ring 11 and a static sealing ring 12 which are arranged on the sealing barrel 10, wherein the dynamic sealing ring 11 and the sealing barrel 10 are sealed by a labyrinth sealing device, and the static sealing ring 12 is fixedly arranged on the sealing barrel 10.

Further, a corrugated pipe compensator 13 is arranged between the dynamic sealing ring 11 and the static sealing ring 12; specifically, as shown in fig. 1, a guide rod 14 is arranged between the movable sealing ring 11 and the stationary sealing ring 12 at the upper end of the sealing cylinder 10, one end of the guide rod 14 penetrates through the movable sealing ring 11, and the other end is fixedly connected with the stationary sealing ring 12 through a nut;

further, a cylinder connecting rod 15 is fixedly connected to one side, facing the static sealing ring 12, of the dynamic sealing ring 11 at the lower end of the sealing cylinder 10; quiet sealing ring 12 keeps away from the fixed cylinder 16 that is provided with in one side of moving sealing ring 11, the piston rod of cylinder 16 passes quiet sealing ring 12 with cylinder connecting rod 15 links to each other, specifically, move sealing ring 11 orientation 3 cylinder connecting rods 15 of the at least fixedly connected with in one side of quiet sealing ring 12, quiet sealing ring 12 keeps away from move 3 cylinders 16 of the at least fixed 3 that are provided with in one side of sealing ring 11, 3 cylinders 16's piston rod all passes quiet sealing ring 12 and 3 cylinder connecting rod 15 respectively link to each other. So that the dynamic and static sealing device and the sealing cylinder 10 are sealed by applying pressure to the dynamic sealing ring 11 through the air cylinder.

Further, the sealing mode of the labyrinth seal device is labyrinth seal.

In addition, one end of the sealing barrel 10 is provided with a feed inlet, and the other end is provided with a discharge outlet, specifically, the feed inlet is arranged at the upper end of the sealing barrel 10 at the front end of the dynamic and static sealing device, and the discharge outlet is arranged at the lower end of the sealing barrel 10 close to the sealing component.

Therefore, the cylinder 16 is added on the dynamic and static sealing device, the deformation of the sealing device caused by high-temperature deformation is changed into the application of constant pressure, and the leakage caused by the fatigue of the sealing device is effectively avoided; meanwhile, one end of the static sealing ring 12 is welded on the sealing cylinder 10, and the movable sealing ring 11 is combined with the corrugated compensator 13 through the labyrinth sealing form of the sealing device, so that the sealing device is more flexible, and can be detached in a sealing manner without stopping; in addition, the sealing surface is changed from linear friction to surface friction through a mechanical sealing form, so that the sealing effect is more excellent. And the movable sealing ring 11 and the sealing cylinder 10 are sealed through a labyrinth sealing device, so that the problem that the sealing fails due to the fact that the bellows compensator 13 contracts or expands due to large temperature difference during start and stop so as to deform the labyrinth sealing device is solved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The sealing device of the HF rotary reaction furnace comprises a sealing cylinder (10) and a spiral shaft (20) arranged in the sealing cylinder (10), and is characterized in that: one end of the spiral shaft (20) is rotatably connected with the sealing cylinder (10), and the other end of the spiral shaft penetrates through the sealing cylinder (10) to be sequentially connected with a pin (30) and a motor (40) and is hermetically connected with the sealing cylinder (10) through a sealing assembly; wherein the pin (30) is connected with the spiral shaft (20) through a bearing assembly, and the motor (40) is connected with the pin (30) through a coupling (50); a dynamic and static sealing device is arranged at one end, far away from the sealing assembly, of the sealing barrel (10), the dynamic and static sealing device comprises a dynamic sealing ring (11) and a static sealing ring (12) which are arranged on the sealing barrel (10), the dynamic sealing ring (11) and the sealing barrel (10) are sealed through a labyrinth sealing device, and the static sealing ring (12) is fixedly arranged on the sealing barrel (10); a corrugated pipe compensator (13) is arranged between the dynamic sealing ring (11) and the static sealing ring (12).

2. The sealing device for an HF rotary reactor as set forth in claim 1, wherein: a guide rod (14) is arranged between the movable sealing ring (11) and the static sealing ring (12) at the upper end of the sealing cylinder (10), one end of the guide rod (14) penetrates through the movable sealing ring (11), and the other end of the guide rod is fixedly connected with the static sealing ring (12) through a nut.

3. The sealing device of an HF rotary reactor as set forth in claim 2, wherein: a cylinder connecting rod (15) is fixedly connected to one side, facing the static sealing ring (12), of the movable sealing ring (11) at the lower end of the sealing cylinder (10); and an air cylinder (16) is fixedly arranged on one side, far away from the movable sealing ring (11), of the static sealing ring (12), and a piston rod of the air cylinder (16) penetrates through the static sealing ring (12) to be connected with the air cylinder connecting rod (15).

4. The sealing device for an HF rotary reactor as set forth in claim 1, wherein: the sealing assembly comprises a sealing shaft sleeve (21) arranged on the spiral shaft (20), a sealing device arranged on the sealing shaft sleeve (21), and a sealing ring (25) arranged on the sealing device, wherein the sealing ring (25) is fixedly connected with the sealing cylinder (10) through a bolt.

5. The sealing device for an HF rotary reactor as set forth in claim 4, wherein: the sealing device comprises a packing sealing device and a labyrinth sealing device.

6. The sealing device for an HF rotary reactor as set forth in claim 5, wherein: the bearing assembly comprises a bearing (31) arranged between the screw shaft (20) and the pin (30), a bearing seat (32) arranged on the bearing (31), and a bearing cover (33) arranged on one side of the bearing (31), wherein the bearing seat (32) and the bearing cover (33) are connected with the bearing (31) through bolts.

7. The sealing device for an HF rotary reactor as set forth in claim 6, wherein: a shaft sleeve (34) is arranged between the bearing cover (33) and the screw shaft (20), and wool felt (35) is arranged between the shaft sleeve (34) and the bearing cover (33).

8. The sealing device for an HF rotary reactor as set forth in claim 7, wherein: and a bearing support (36) is fixedly arranged on one side of the sealing ring (25), and the bearing assembly is positioned on the bearing support (36).

9. The sealing device for an HF rotary reactor as set forth in claim 1, wherein: one end of the sealing cylinder (10) is provided with a feeding hole, and the other end of the sealing cylinder is provided with a discharging hole.