CN214578825U

CN214578825U - Gas sealing device for rotary hub and fire box of drying machine

Info

Publication number: CN214578825U
Application number: CN202120385969.0U
Authority: CN
Inventors: 魏振文; 蒋兵; 崔建波; 肖泽旭; 吕宏霞
Original assignee: Shuoyuan New Materials Dongying Co Ltd; Doright Co ltd
Current assignee: Shuoyuan New Materials Dongying Co Ltd; Doright Co ltd
Priority date: 2021-02-20
Filing date: 2021-02-20
Publication date: 2021-11-02
Anticipated expiration: 2031-02-20

Abstract

The utility model discloses a desiccator changes hub and fire box gas seal device, this sealing device includes: the device comprises a rotary hub 1, a graphite sealing device 2, a pressure plate 3, a ring plate 4, a short section 5, an upper semicircular main pipe 6, a small connecting pipe 7, a fire box 8, a lower semicircular main pipe 9 and a supporting plate 10. This sealing device has increased one gas seal between original sealing device and fire box 8, has effectively solved fire box "cross fire" and has leaded to graphite sealing device 2 to be burnt out, prevents that tail gas is extravagant and air pollution scheduling problem.

Description

Gas sealing device for rotary hub and fire box of drying machine

Technical Field

The utility model relates to a sealing device between desiccator rotary hub and fire box.

Background

For many years, the drying equipment widely used in the carbon black industry consists of a dryer rotating hub and a fire box, and the drying process is as follows: high-temperature tail gas enters the space between the fire box and the rotary hub of the dryer from the port a, heats the rotary hub and then flows back from the tail gas return port c_1-3Entering the rotating hub; wet materials enter the rotary hub of the dryer from the port f, are mixed with high-temperature tail gas in the rotary hub through the shoveling plate, and are dried and then discharged from the port g; the tail gas after cooling is discharged from the port b, and the whole process achieves the aim of drying wet materials. The rotating hub and the fixed fire box are sealed by a spring leaf. The barrel body of the rotary hub is thin-walled and large in diameter, the length of the barrel body is generally about 18 meters, the length of the fire box is about 15 meters, the rigidity of the rotary hub is poor and is influenced by the ovality of the rotary hub, vertical jumping can be generated in the rotating process, although the fire box is in a micro negative pressure atmosphere, spring sheets which are overlapped together can generate deformation and generate gaps along with the operation of equipment, high-temperature tail gas is leaked from a sealing part, the fire is commonly called 'mixed fire' after meeting air, potential safety hazards are brought to the equipment and personnel, and meanwhile the air is polluted. Sealing between the firebox and the hub is therefore particularly important. Through investigation, a gas sealing device is designed and developed, adverse effects caused by tail gas leakage are effectively eliminated, and meanwhile, reduction of drying effect and waste of tail gas caused by tail gas leakage are also prevented.

Disclosure of Invention

The utility model aims at designing a gas seal device, the technical scheme that this sealing device took is:

a kind of drier rotates the hub and fire box gas seal device, including: rotating hub 1, graphite sealing device 2, clamp plate 3, crown plate 4, nipple joint 5, last semicircle are responsible for 6, little takeover 7, firebox 8, lower semicircle are responsible for 9, backup pad 10, its characterized in that: welding a short section (5) on the ring plates (4) on the two end surfaces of the fire box (8), and connecting the graphite sealing device (2) on the ring plate (4) at one end of the short section (5); a plurality of pipe connecting holes are formed in the circumferential direction of the short section (5); an annular air inlet main pipe is formed by an upper semicircular main pipe (6) and a lower semicircular main pipe (9) and passes through a plurality of annular air inlet main pipesThe small connecting pipe (7) is communicated with the short section (5); the supporting plates (10) welded on the end surface of the fire box (8) support the annular main air inlet pipe. The sealing process is as follows: introducing a flow of exhaust gas from d through a bag filter_1-2The port enters the increased sealed annular air inlet main pipe, enters an annular space formed by the short joint (5), the end face of the fire box (8) and the annular plate (4) through the small connecting pipe (7), and finally enters the fire box (8) through a gap between the fire box (8) and the rotating hub (1) to be converged with high-temperature tail gas. The sealing structure of the fire box (8) and the rotating hub (1) after innovation and improvement effectively solves the problems that the graphite sealing device (2) is burnt out due to fire crossing of the fire box, the tail gas is prevented from being wasted, the air is polluted and the like.

The design points of the utility model are:

1. the fire box and the rotating hub are sealed by gas and graphite combination;

2. a gas sealing pipe system is added between the graphite sealing device and the fire box;

3. introducing a gas stream from the bag filter into the piping;

4. the introduced gas flows to the fire box with micro negative pressure and is collected with tail gas entering the fire box;

5. the graphite seal is directly connected to the piping end plate.

The utility model has the advantages that:

1. the gas sealing is not influenced by the deformation of the rotating hub, so that the gapless sealing effect is good;

2. the problem that the graphite sealing device is burnt out by the fire of the fire box is effectively solved;

3. the introduced gas directly enters a fire box to be converged with high-temperature tail gas, and then enters a rotating hub to be mixed with wet materials;

4. gaps between the rotating hub and the fire box and between the graphite sealing device and the rotating hub are sealed by gas, so that no abrasion and no leakage exist;

5. the high-temperature tail gas is not leaked, the drying effect of wet materials is good, the efficiency is high, and the heat energy loss of the tail gas furnace is effectively reduced;

6. the service life of the graphite sealing device is effectively prolonged, the period of replacing a sealing easily-damaged part is prolonged, and the maintenance cost is reduced; 7. the production cost is reduced, and the pollution to the air due to tail gas leakage is avoided.

Drawings

Fig. 1 the utility model discloses a desiccator changes hub and fire box gas seal device sketch map

FIG. 2 is a view of FIG. 1A-A

The labels in the figure are: 1-rotating hub, 2-graphite sealing device, 3-pressing plate, 4-ring plate, 5-short section, 6-upper semi-circular main pipe, 7-small connecting pipe, 8-fire box, 9-lower semi-circular main pipe and 10-supporting plate.

a-tail gas inlet, b-tail gas outlet, c_1-3-exhaust gas return port, d_1-2-exhaust gas inlet, e_1-2-a drain, an f-wet material inlet, a g-dry material outlet

Detailed Description

A kind of drier rotates the hub and fire box exhaust gas sealing means, comprising: the device comprises a rotary hub 1, a graphite sealing device 2, a pressure plate 3, a ring plate 4, a short section 5, an upper semicircular main pipe 6, a small connecting pipe 7, a fire box 8, a lower semicircular main pipe 9 and a supporting plate 10.

The specific implementation process comprises the following steps:

1. manufacturing a component: upper semicircular main pipe 6 and waste gas inlet d_1-2The connecting pipe and the connecting flange are welded to form a semicircular air inlet main pipe, and a small connecting pipe 7 is opened; the lower half main pipe 9 and a sewage draining exit e_1-2The connecting pipe and the connecting flange are welded to form a semicircular air inlet main pipe, and a small connecting pipe 7 is opened; the rolled short section 5 and the ring plate 4 are welded to form an annular assembly, and a small connecting pipe 7 is formed;

2. welding the annular assembly and the end plate of the fire box 8 together;

3. the small connecting pipe 7 is respectively welded with the upper semicircular main pipe 6, the lower semicircular main pipe 9 and the annular assembly;

4. the upper semicircular main pipe 6 and the lower semicircular main pipe 9 are connected into a whole by bolts to form an integral air inlet main pipe;

5. a graphite sealing device 2 is arranged between the rotating hub 1 and the fire box 8;

6. the pressure plate 3 is used for blocking the graphite block in the graphite sealing device 2, so that the graphite block can still be attached to the rotating hub 1 along with the radial runout of the rotating hub 1, and the sealing purpose is achieved.

Claims

1. A kind of drier rotates the hub and fire box gas seal device, including: change hub (1), graphite sealing device (2), clamp plate (3), crown plate (4), nipple joint (5), go up the semicircle and be responsible for (6), little takeover (7), firebox (8), lower semicircle are responsible for (9), backup pad (10), its characterized in that: welding a short section (5) on the ring plates (4) on the two end surfaces of the fire box (8), and connecting the graphite sealing device (2) on the ring plate (4) at one end of the short section (5); a plurality of pipe connecting holes are formed in the circumferential direction of the short section (5); an annular air inlet main pipe is formed by the upper semicircular main pipe (6) and the lower semicircular main pipe (9) and is communicated with the short section (5) through a plurality of small connecting pipes (7); the supporting plates (10) welded on the end surface of the fire box (8) support the annular main air inlet pipe.