CN103994645B - A kind of energy-efficient roller drying drying equipment - Google Patents

Abstract

A high-efficiency and energy-saving drum drying and drying equipment, including a drum dryer and a drying furnace. The drum dryer includes: a main cylinder, a heat dissipation pipe, an attached cylinder, a front cover, a rear cover, and an insulation layer; The furnace includes: connecting elbows, furnace core, furnace wall, outer wall, fuel inlet pipe and furnace bridge; among them, the outer wall of the auxiliary cylinder is attached with an insulation layer, and the front part of the auxiliary cylinder is provided with a flue gas outlet; both ends of the main cylinder are provided with cover plates, The front end cover plate is provided with material inlet and hot air inlet, and the rear end cover plate is provided with material outlet and moisture outlet; Open the hole for the head connection. The high-efficiency and energy-saving drum drying equipment provided by the invention saves 30% to 50% of fuel compared with the existing drum drying equipment.

Description

A high-efficiency and energy-saving drum drying equipment

technical field

The invention relates to drying equipment, in particular to a high-efficiency and energy-saving drum drying equipment.

Background technique

Drum drying equipment is widely used in chemical industry, metallurgy, mining and other fields. At present, the drum drying equipment mostly uses the furnace wall to heat the air, and then uses the hot air to dry the materials, and the connecting elbow adopts water cooling or does not take cooling measures, and the high-temperature pyrotechnic tail gas is directly discharged, the thermal efficiency is low, and the energy consumption is large, which is not conducive to Environmental protection and efficient use of resources.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-efficiency and energy-saving tumble drying and drying equipment, which can not only fully burn fuel and fully utilize energy, but also effectively utilize heat energy and achieve the purpose of environmental protection. The high-efficiency and energy-saving drum drying equipment provided by the invention saves 30% to 50% of fuel compared with the existing drum drying equipment.

The purpose of the present invention is achieved like this:

A high-efficiency and energy-saving drum drying and drying equipment, including a drum dryer and a drying furnace, is characterized in that: the drum dryer includes: a main cylinder, a heat dissipation pipe, an attached cylinder, a front cover, a rear cover, a heat preservation layer; drying furnace includes: connecting elbow, furnace core, furnace wall, outer wall, fuel inlet pipe and furnace bridge;

Among them, the outer wall of the attached cylinder is equipped with an insulation layer, and the front section of the attached cylinder is provided with a flue gas outlet;

The two ends of the main cylinder are provided with cover plates, the front cover plate is provided with material inlet and hot air inlet, and the rear end cover plate is provided with material outlet and moisture outlet;

The front section of the heat dissipation pipe protrudes from the hot air inlet of the front cover plate, and the rear section is connected to the main cylinder through an elbow, and the connection between the main cylinder and the elbow is opened;

The connecting elbow is divided into inner and outer tubes. The outer wall of the inner tube is welded with cooling fins. The inner tube is connected to the furnace body through a flange. A ventilation sleeve is welded to the outer wall of the lower section of the outer tube. The ventilation sleeve is welded to the flange. The air inlet blower is connected; the inner pipe of the elbow extends into the inside of the heat dissipation pipe through the connecting pipe, and the outer pipe of the connecting elbow is connected to the front end cover plate to reserve space and is connected through a sealing sleeve.

The heat dissipation pipe is welded to the main cylinder through an angle steel.

The front end cover plate and the rear end cover plate are provided with sealing rings, and a space of 1-10 mm is reserved between the sealing rings and the main cylinder.

Sealing rings are provided at both ends of the attached cylinder, and a space of 1-10mm is reserved between the sealing ring and the main cylinder.

When the tumble dryer is installed, the front end is higher than the rear end, and the inclination angle is 1~5 ^o is the best.

The best depth for connecting the inner pipe of the elbow to extend into the heat pipe through the connecting pipe is 5~15cm. The outer pipe of the connecting elbow and the front cover plate shall reserve a space of 5~10cm and connect it through a sealing sleeve; the outer wall of the lower part of the outer pipe of the connecting elbow shall be welded Ventilation sleeve, at the same time, it is best to keep a space of 1~3cm between the outer tube and the flange. This design can ensure that the air can enter the inner tube evenly from all directions, and prevent the air from entering the outer tube from only one side, which will cause the connection The heat dissipation effect of the elbow inner tube is not ideal.

The furnace core is made of refractory bricks built inside the furnace wall, and an outer wall is added to the furnace wall. A space of 5~10cm is left between the two as a ventilation channel. The ventilation channel communicates with the bottom of the furnace bridge through the air inlet pipe. The ventilation channel passes through the pipe It is connected with the air inlet blower, so that the wind first passes through the furnace wall and then reaches the bottom of the furnace bridge through the pipe, so that the wind not only cools the furnace wall to prevent the furnace wall from being overheated and quickly oxidized, but also the heated air can promote the full combustion of fuel .

In addition, there is a dust collection box at the lower part of the attached cylinder, which is convenient for cleaning the garbage in the attached cylinder. The lower cover of the dust collection box is connected with the box body through a loose leaf, which is convenient and practical.

The beneficial effects of the present invention are:

1. The connecting elbow adopts double-layer pipes, and the outer wall of the inner pipe is welded with cooling fins. During operation, ventilation can cool the inner pipe and prevent the inner pipe from being oxidized due to excessive temperature. At the same time, high-temperature air enters the main cylinder through the outer pipe to dry materials , heat energy is effectively utilized.

2. After the flue gas in the boiler passes through the radiating pipe, the exhaust gas still has a relatively high temperature. In the present invention, the radiating pipe is connected to the main cylinder through an elbow, and the exhaust gas enters the rear section of the attached cylinder from the radiating pipe, and passes through the attached cylinder and the main cylinder. The space is discharged from the front section of the attached cylinder. This design can not only isolate the main cylinder from the cold outside air, prevent the heat loss of the main cylinder, but also use the heat of the exhaust gas to heat the main cylinder to prevent the generation of high-temperature water vapor in the main cylinder. , When encountering the inner wall of the main cylinder with a relatively low temperature, it condenses on it, so that the powder in the cohesive cylinder is continuously blocked to block the main cylinder, so that the heat energy can be used more effectively, so as to achieve the purpose of environmental protection.

3. Weld the ventilation sleeve on the outer wall of the lower part of the outer pipe of the connecting elbow, and at the same time reserve a certain space between the outer pipe and the flange. This design can ensure that the air can enter the interior of the outer pipe evenly from all directions, and prevent the air from entering the outer pipe from only one side. The inside of the tube, resulting in unsatisfactory heat dissipation effect of the heat sink.

4. The inner pipe of the connecting elbow extends into the inside of the heat dissipation pipe through the connecting pipe, and the outer pipe of the connecting elbow and the front cover plate reserve a certain space and connect through the sealing sleeve, so that the operation of the heat dissipation pipe can not be hindered, and the heat dissipation pipe can be eliminated. Adverse effects caused by changes in the length of the pipe body caused by thermal expansion and contraction.

5. There is a dust collection box at the lower part of the attached cylinder, which is convenient for cleaning the garbage in the attached cylinder. The lower cover of the dust collection box is connected with the box body through a loose leaf, which is simple and practical.

6. The connecting elbow is connected with the furnace body by flange, which is convenient for installation and maintenance.

The high-efficiency and energy-saving drum drying equipment provided by the invention saves 30% to 50% of fuel compared with the existing drum drying equipment.

Description of drawings

Fig. 1 is the high-efficiency and energy-saving drum drying equipment of the present invention;

Fig. 2 is the sectional view of drying oven;

Fig. 3 is the sectional view of A-A position in Fig. 1;

Figure 4 is an enlarged view of the elbow;

Among them, 1 main cylinder, 2 heat pipes, 3 attached cylinders, 4 front cover plates, 5 rear end cover plates, 6 insulation layers, 7 connecting elbows, 8 furnace cores, 9 inner tubes, 10 outer tubes, 11 heat sinks, 12 furnace wall, 13 outer wall, 14 fuel inlet pipe, 15 furnace bridge, 16 air inlet blower, 17 ventilation casing, 18 sealing sleeve, 19 sealing ring, 20 dust box.

detailed description

Example

A high-efficiency and energy-saving drum drying and drying equipment, including a drum dryer and a drying furnace. The drum dryer includes: a main cylinder 1, a heat dissipation pipe 2, an attached cylinder 3, a front cover 4, a rear cover 5, Insulation layer 6; drying furnace includes: connecting elbow 7, furnace core 8, furnace wall 12, outer wall 13, fuel inlet pipe 14 and furnace bridge 15;

Among them, the outer wall of the attached cylinder 3 is attached with an insulating layer 6, and the front section of the attached cylinder 3 is provided with a flue gas outlet;

Both ends of the main cylinder are provided with cover plates, the front cover plate 4 is provided with material inlet and hot air inlet, and the rear end cover plate 5 is provided with material outlet and moisture outlet;

The front section of the heat dissipation pipe 2 extends from the hot air inlet of the front cover plate, and the rear section is connected to the main cylinder 1 through an elbow, and the connection part between the main cylinder 1 and the heat dissipation pipe 2 is opened;

The connecting elbow 7 is divided into inner and outer two-layer pipes, the outer wall of the inner pipe 9 is welded to the heat sink 11, the inner pipe 9 is connected to the furnace body through a flange, and a ventilation sleeve 17 is welded to the outer wall of the lower section of the outer pipe 10, and the ventilation sleeve 17 is welded to the flange , the ventilation sleeve 17 is connected with the air inlet blower 16 through a pipe, the inner pipe of the connecting elbow 7 extends into the heat dissipation pipe 2 through the connecting pipe by 8 cm, and the outer pipe of the connecting elbow and the front end cover retain a space of 8 cm and pass through the sealing sleeve 18 connect.

The front end cover plate 4 and the rear end cover plate 5 are provided with a sealing ring 19, and a space of 3mm is reserved between the sealing ring 19 and the main cylinder.

The heat dissipation pipe 2 is welded to the main cylinder 1 through an angle steel.

Both ends of the attached cylinder 3 are provided with sealing rings 19, and a space of 3mm is reserved between the sealing rings 19 and the main cylinder 1.

When the drum drying equipment is installed, the front end is higher than the rear end, and the inclination angle is 3°C.

The heat dissipation pipe 2 is connected to the main cylinder 1 through an elbow, and a hole is opened at the connecting part of the elbow and the main cylinder 1 .

The front section of the attached cylinder 3 is provided with a flue gas outlet.

Furnace core 8 is made of refractory bricks built inside the furnace wall, and an outer wall 13 is added to the furnace wall. A 7cm space is left between the two as a ventilation channel. The ventilation channel communicates with the bottom of the furnace bridge through the air inlet pipe. Connect with air intake blower 16.

In addition, a dust collection box 20 is provided at the bottom of the attached cylinder 3 to facilitate the cleaning of the garbage in the attached cylinder. The lower cover plate of the dust collection box 20 is connected with the box body through a loose leaf, which is simple and practical.

Claims (8)

1. an energy-efficient roller drying drying equipment, comprises roller drying machine and drying oven, it is characterized in that: roller drying machine comprises: main cylinder, radiating tube, attached cylinder, cover board of front end, rear-end plate, heat-insulation layer; Drying oven comprises: connecting bend, combustion chamber, furnace wall, outer wall, fuel inlet tube and grate;

Wherein, the attached heat-insulation layer of attached drum outer wall, attached cylinder leading portion is provided with exhanst gas outlet;

The two ends of main cylinder are provided with cover plate, and cover board of front end is provided with material inlet and hot wind inlet, and rear-end plate is provided with material outlet and damp exit;

Radiating tube leading portion stretches out from cover board of front end hot wind inlet, and back segment is connected with main cylinder by elbow, and main cylinder and elbow connecting portion punch;

Connecting bend divides inside and outside two-layer pipe, outer wall of inner tube welding fin, and interior pipe is connected with body of heater by flange, outer tube bottom outer wall welds a ventilation sleeve pipe, ventilation sleeve pipe and flange welding, outer tube lower end and flange retain certain space simultaneously, and ventilation sleeve pipe is connected with air intake air blast by pipeline; In connecting bend, pipe stretches into radiating tube inside by tube connector, and connecting bend outer tube is with cover board of front end retaining space and be connected by seal sleeve.

2. a kind of energy-efficient roller drying drying equipment according to claim 1, it is characterized in that: described cover board of front end and rear-end plate are provided with sealing ring, sealing ring and main cylinder retain the space of 1 ~ 10mm.

3. a kind of energy-efficient roller drying drying equipment according to claim 1, is characterized in that: described attached cylinder two is provided with sealing ring, and sealing ring and main cylinder retain the space of 1 ~ 10mm.

4. a kind of energy-efficient roller drying drying equipment according to claim 1, is characterized in that: when described roller drying machine is installed be front end higher than rear end, angle of inclination is 1 ~ 5 ^o.

5. a kind of energy-efficient roller drying drying equipment according to claim 1, it is characterized in that: in described connecting bend, pipe stretches into radiating tube 5 ~ 15cm by tube connector, connecting bend outer tube is retained 5 ~ 10cm space with cover board of front end and is connected by seal sleeve.

6. a kind of energy-efficient roller drying drying equipment according to claim 1, is characterized in that: described connecting bend outer tube bottom outer wall welding ventilation sleeve pipe, outer tube and flange retain the space of 1 ~ 3cm simultaneously.

7. a kind of energy-efficient roller drying drying equipment according to claim 1, it is characterized in that: described combustion chamber forms by building refractory brick in furnace wall by laying bricks or stones, air intake passage is communicated with below grate by blast pipe, and air intake passage is connected with air intake air blast by pipeline.

8. a kind of energy-efficient roller drying drying equipment according to claim 1, is characterized in that: described attached cylinder bottom is provided with dust-collecting box.