CN211896697U - Gypsum rotary calcining kiln adopting double-barrel flue gas pipe - Google Patents

Abstract

The utility model discloses an adopt gypsum gyration calcining kiln of binocular flue gas pipe, it includes the feeder, steam exhaust pipe, the kiln body, flue gas chamber, flue gas import, flue gas heat exchange tube, flue gas exhaust box, flue gas secondary heat transfer chamber, flue gas circulation room, stock guide, wheel band, ring gear, radiating fin, pipeline lock ring and ejection of compact case. The utility model improves the heat utilization rate and reduces the heat radiation of the kiln body by arranging the secondary flue gas heat exchange cavity outside the kiln body and combining the advantages of flue gas pipeline heat exchange in the kiln body and heating the kiln body by recycling the low-temperature tail gas after the flue gas pipeline heat exchange; through setting up flue gas chamber and flue gas secondary heat transfer chamber, reduce the influence of ambient temperature to the gypsum calcination temperature, the internal surface of the at utmost utilization kiln body heats the gypsum in the kiln body, improves the effective heat transfer area of waste heat utilization and equipment to reach high-efficient heat transfer, improve equipment productivity, energy saving consumes, reduce the purpose of heat energy cost.

Description

Gypsum rotary calcining kiln adopting double-barrel flue gas pipe

Technical Field

The patent of the utility model belongs to gypsum calcining equipment field especially relates to a gypsum gyration calcining kiln who adopts binocular flue gas pipe.

Background

With the rapid development of gypsum industry and the improvement of environmental protection requirements in China in recent years, main fuels required by gypsum powder production are gradually developed from fire coal to biomass fuels, fuel gas and even diversified fuels such as fuel oil, so that the combustion form of the fuels becomes a main factor influencing the gypsum production cost; meanwhile, the total amount of exhaust gas is limited in the production process of gypsum, so that the thinking of gypsum production enterprises on the problems of fuel selection, production efficiency improvement and the like is also realized. How to utilize heat energy with high efficiency, improve equipment heat exchange efficiency, furthest carries out waste heat utilization, reduces the production energy consumption by a wide margin, reduces manufacturing cost, is the first difficult problem that present gypsum manufacturing enterprise faces.

The gypsum calcining equipment adopted in the prior art is a countercurrent or concurrent rotary kiln with direct contact of flue gas, and a single-return or multi-return pipeline is used for finishing indirect heat exchange. However, the rotary kiln in the form of direct contact of flue gas has simple structure, short heat exchange path and low heat exchange efficiency. At present, although the most advanced gypsum calcining equipment in the field, namely the tubular calcining kiln, is provided with a multi-return-stroke heat exchange path in a kiln body, a pipeline of the tubular calcining kiln is arranged in the kiln body, materials are contacted with the inner surface of the kiln body during feeding, so that the inner surface of the kiln body becomes the largest heat dissipation surface, and the theoretical value of the pipeline heat exchange arranged in the kiln body is greatly different from the actual value. Therefore, a gypsum calcining kiln which can utilize tail gas and combine a pipeline heat exchange technology to ensure that the surface of a kiln body cannot dissipate heat and can also secondarily utilize the tail gas for heating and heat preservation is needed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a gypsum rotary calcining kiln adopting double-cylinder flue gas pipes.

The utility model discloses an adopt following technical scheme to realize: the utility model provides an adopt gypsum gyration calcining kiln of binocular flue gas pipe, its includes feeder, steam exhaust pipe, the kiln body, flue gas chamber, flue gas import, flue gas heat exchange tube, flue gas exhaust case, flue gas secondary heat transfer chamber, flue gas circulation chamber, stock guide, wheel band, ring gear, radiating fin, pipeline lock ring and ejection of compact case, its characterized in that: the kiln body comprises a kiln head, a kiln tail and a sealing device; a water vapor exhaust pipe is arranged in the center of the kiln head; the feeder is fixed on the inner surface of the water vapor exhaust pipe; the central axis of the water vapor exhaust pipe is parallel to the central axis of the kiln body; the sealing device comprises a kiln head sealing device, a flue gas chamber sealing device, a flue gas exhaust box sealing device and a discharge box sealing device; the water vapor exhaust pipe and the kiln body are sealed by a kiln head sealing device; a smoke gas chamber is arranged on the outer surface of the kiln head; the inner surface of the kiln head is provided with a flue gas inlet; more than one flue gas heat exchange tube is arranged in the kiln body in the circumferential direction; the flue gas chamber is communicated with the flue gas heat exchange tube through a flue gas inlet; the flue gas chamber and the kiln body are sealed by a flue gas chamber sealing device; more than one flue gas pipeline support ring is arranged in the kiln body and fixed on the inner surface of the kiln body; the central axis of the heat exchange tube is parallel to the central axis of the kiln body; the pipeline support ring is used for fixing a flue gas heat exchange pipe arranged in the kiln body; the inner surface of the kiln tail is provided with a flue gas circulating chamber communicated with the flue gas heat exchange tube; the outer surface of the kiln tail is provided with a smoke secondary heat exchange cavity; the flue gas heat exchange tube is communicated with the flue gas secondary heat exchange cavity through the flue gas circulation chamber; the outer surface of the kiln tail is provided with a flue gas exhaust box; the flue gas exhaust box is communicated with the flue gas secondary heat exchange cavity; the flue gas exhaust box and the kiln body are sealed by a flue gas exhaust box sealing device; the inner surface of the kiln body is provided with a material guide plate and radiating fins; the wheel belt is fixed on the outer surface of the kiln body; the outer surface of the flue gas secondary heat exchange cavity is provided with a belt wheel and a gear ring; the secondary flue gas heat exchange cavity is communicated with the fixed parts of the belt pulley and the gear ring; the discharge box is arranged at the kiln tail; the discharge box and the kiln body are sealed by a discharge box sealing device.

The feeder is fixed at the lower end of the axis of the water vapor exhaust pipe; the feeder is in a spiral forced propelling type; the feeder is provided with a feed inlet, a discharge outlet, a feed box, a spiral feed shaft and a motor, wherein the feed inlet is arranged outside the water vapor exhaust pipe, and the discharge outlet is arranged in the water vapor exhaust pipe; the lower surface of the feeder is contacted with the inner surface of the lower end of the axle center of the water vapor exhaust pipe; the water vapor exhaust pipe is a hollow cylinder; the water vapor exhaust pipe also comprises a vapor outlet and a vapor inlet; the steam outlet of the steam exhaust pipe is arranged on the outer surface of the steam exhaust pipe outside the kiln body; and the steam inlet of the steam exhaust pipe is arranged on the outer surface of the steam exhaust pipe in the kiln body.

The flue gas chamber is in a long cubic shape; the flue gas inlet is an annular pipeline with an opening on the side surface, and the flue gas inlet and the kiln body are concentric and coaxial; the flue gas secondary heat exchange cavity is a hollow cylinder and is arranged on the outer surface of the kiln body in a wrapping mode; the flue gas circulation chamber is an annular pipeline with an opening on the side surface, and the flue gas circulation chamber is fixed on the inner surface of the kiln body and is concentric and coaxial with the kiln body.

And the upper surface of the flue gas exhaust box is provided with a smoke exhaust port for exhausting flue gas after secondary utilization.

The wheel belt arranged on the outer surface of the kiln body is positioned between the flue gas chamber and the flue gas exhaust box; the belt wheel arranged on the outer surface of the flue gas secondary heat exchange cavity is positioned at the kiln tail; and the gear ring arranged on the outer surface of the smoke secondary heat exchange cavity is positioned between the smoke exhaust box and the radiating fins.

The material guide plate is positioned on the inner surface of the kiln head; the material guide plate is arranged between two adjacent flue gas heat exchange tubes; the radiating fins are positioned at the middle section of the kiln body; the radiating fins are arranged between two adjacent flue gas heat exchange tubes; the wing surfaces of the radiating fins are parallel to the central axis of the flue gas heat exchange tube.

After the structure is adopted, the utility model discloses beneficial effect does: the utility model has reasonable structural design, and the kiln body is heated by the low-temperature tail gas after heat exchange of the flue gas pipeline by arranging the flue gas secondary heat exchange cavity outside the kiln body and combining the advantage of flue gas pipeline heat exchange in the kiln body, thereby avoiding the heat dissipation in the kiln body; through setting up flue gas chamber and flue gas secondary heat transfer chamber, reduce the influence of ambient temperature to the gypsum calcination temperature, the internal surface of the at utmost utilization kiln body heats the gypsum in the kiln body, improves the effective heat transfer area of waste heat utilization and equipment to reach high-efficient heat transfer, improve equipment productivity, energy saving consumes, reduce the purpose of heat energy cost.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the kiln body and the feeding and exhausting device of the present invention;

FIG. 3 is a schematic cross-sectional view of the flue gas chamber and flue gas heat exchange pipe section of the present invention;

FIG. 4 is a schematic cross-sectional view of the flue gas circulation chamber and the flue gas secondary heat exchange chamber section of the present invention;

wherein: 1. a feeder; 101. a feed inlet; 102. a discharge port; 103. a feeding box; 104. a helical feed shaft; 105. a motor; 2. a water vapor exhaust pipe; 201. a steam outlet; 202. a steam inlet; 3. a kiln body; 301. a kiln head; 302. a kiln tail; 303. a kiln head sealing device; 304. a discharge box sealing device; 4. a flue gas chamber; 5. a flue gas inlet; 6. a flue gas heat exchange pipe; 7. a flue gas exhaust box; 8. a flue gas secondary heat exchange cavity; 9. a flue gas circulation chamber; 10. a material guide plate; 11. a belt wheel; 12. a ring gear; 13. heat dissipating fins; 14 a pipe support ring; 15. and a discharging box.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, a gypsum rotary calcining kiln using double-cylinder flue gas pipes comprises a feeder 1, a water vapor exhaust pipe 2, a kiln body 3, a flue gas chamber 4, a flue gas inlet 5, a flue gas heat exchange pipe 6, a flue gas exhaust box 7, a flue gas secondary heat exchange cavity 8, a flue gas circulation chamber 9, a guide plate 10, a wheel belt 11, a gear ring 12, a heat dissipation fin 13, a pipeline support ring 14 and a discharge box 15, wherein the kiln body 3 comprises a kiln head 301, a kiln tail 302 and a sealing device; a water vapor exhaust pipe 2 is arranged at the center of the kiln head 3; the feeder 1 is fixed on the inner surface of the water vapor exhaust pipe 2; the central axis of the water vapor exhaust pipe 2 is parallel to the central axis of the kiln body 3; the feeder 1 is fixed at the lower end of the axis of the water vapor exhaust pipe 2; the feeder 1 is of a spiral forced propelling type; the feeder is provided with a feed inlet 101, a discharge outlet 102, a feed box 103, a spiral feed shaft 104 and a motor 105, wherein the feed inlet 101 is arranged outside the steam exhaust pipe 2, and the discharge outlet 102 is arranged in the steam exhaust pipe 2; the lower surface of the feeder 1 is contacted with the inner surface of the lower end of the axle center of the water vapor exhaust pipe 2; the water vapor exhaust pipe 2 is a hollow cylinder; the steam exhaust pipe 2 further comprises a steam outlet 201 and a steam inlet 202; the steam outlet 201 of the steam exhaust pipe 2 is arranged on the outer surface of the steam exhaust pipe 2 outside the kiln body 3; the steam inlet 202 of the steam exhaust pipe 2 is arranged on the outer surface of the steam exhaust pipe 2 in the kiln body 3; the sealing device comprises a kiln head sealing device 303, a flue gas chamber sealing device, a flue gas exhaust box sealing device and a discharge box sealing device 304; the water vapor exhaust pipe 2 and the kiln body 3 are sealed 303 by a kiln head sealing device; a flue gas chamber 4 is arranged on the outer surface of the kiln head 3, and the flue gas chamber 4 is in a long cubic shape; the inner surface of the kiln head 3 is provided with a flue gas inlet 5, the flue gas inlet 5 is an annular pipeline with an opening on the side surface, and the flue gas inlet 5 and the kiln body 3 are concentric and coaxial; more than one flue gas heat exchange tube 6 is arranged in the kiln body 3 according to the circumferential direction; the flue gas chamber 4 is communicated with a flue gas heat exchange tube 6 through a flue gas inlet 5; the flue gas chamber 4 and the kiln body 3 are sealed by a flue gas chamber sealing device; more than one pipeline support ring 14 is arranged in the kiln body 3 and fixed on the inner surface of the kiln body 3; the central axis of the flue gas heat exchange tube 6 is parallel to the central axis of the kiln body 3; the pipeline support ring 14 is used for fixing the flue gas heat exchange tube 6 arranged in the kiln body 3; the inner surface of the kiln tail 302 is provided with a flue gas circulation chamber 9 communicated with the flue gas heat exchange tube 6, the flue gas circulation chamber 9 is an annular pipeline with an opening on the side surface, and the flue gas circulation chamber 9 is fixed on the inner surface of the kiln body 3 and is concentric and coaxial with the kiln body 3; the outer surface of the kiln tail 302 is provided with a flue gas secondary heat exchange cavity 8, and the flue gas secondary heat exchange cavity 8 is a hollow cylinder and is arranged on the outer surface of the kiln body 3 in a wrapping manner; the flue gas heat exchange tube 6 is communicated with a flue gas secondary heat exchange cavity 8 through a flue gas circulating chamber 9; the outer surface of the kiln tail 302 is provided with a flue gas exhaust box 7, the upper surface of the flue gas exhaust box 7 is provided with a smoke outlet, and flue gas after secondary utilization is discharged; the flue gas exhaust box 7 is communicated with the flue gas secondary heat exchange cavity 8; the flue gas exhaust box 7 and the kiln body 3 are sealed by a flue gas exhaust box sealing device; the inner surface of the kiln body 3 is provided with a material guide plate 10 and radiating fins 13; the material guide plate 10 is positioned on the inner surface of the kiln head 301, and the material guide plate 10 is arranged between two adjacent flue gas heat exchange tubes 6 and has the function of assisting the movement of materials; the radiating fins 13 are positioned at the middle section of the kiln body 3, the radiating fins 13 are arranged between two adjacent flue gas heat exchange tubes 6, and the wing surfaces of the radiating fins 13 are parallel to the central axis of the flue gas heat exchange tubes 6; the belt pulley 11 is fixed on the outer surface of the kiln body 3 and is positioned between the flue gas chamber 4 and the flue gas exhaust box 7; the outer surface of the flue gas secondary heat exchange cavity 8 is provided with a belt pulley 11 and a gear ring 12, and the belt pulley 11 arranged on the outer surface of the flue gas secondary heat exchange cavity 8 is positioned at the kiln tail 302; the gear ring 12 arranged on the outer surface of the flue gas secondary heat exchange cavity 8 is positioned between the flue gas exhaust box 7 and the radiating fins 13; the flue gas secondary heat exchange cavity 8 is communicated with the fixed parts of the belt pulley 11 and the gear ring 12; the discharging box 15 is arranged at the kiln tail 302; the discharge box 15 and the kiln body 3 are sealed 304 by a discharge box sealing device.

The kiln body 3 rotates by taking the central shaft of the kiln body 3 as a reference under the action of the belt 11, the mechanism for driving the belt to operate, the gear ring 12 and the mechanism for driving the gear ring to operate.

The material passes through feeder 1 and gets into kiln body 3 in, kiln body 3 rotates and makes the inside material of kiln body 3 move towards the direction of ejection of compact case 15, high temperature flue gas fills in flue gas chamber 4 this moment, the flue gas passes through flue gas inlet 5 and gets into in flue gas heat exchange tube 6, the flue gas flows to kiln tail 302 along flue gas heat exchange tube 6 from kiln head 301, flue gas arrival flue gas circulation chamber 9 after a period of time, the flue gas passes through flue gas circulation chamber 9 and gets into in flue gas secondary heat exchange chamber 8, flue gas reachs flue gas exhaust case 7 afterwards, provide the negative pressure for flue gas exhaust case 7 by the draught fan, make the flue gas discharge get into the process of gathering dust afterwards.

In the process of rotation of the kiln body 3, materials move in the kiln body 3, the materials are in contact with the inner surface of the kiln body 3, which is in contact with the kiln body 3, of the flue gas chamber 4 and the outer surface of the flue gas heat exchange tube 6, the materials in the kiln body 3 are heated through the temperature of the flue gas in the flue gas chamber 4 and the temperature of the flue gas in the flue gas heat exchange tube 6, meanwhile, the materials are matched with the guide plate 10 arranged in the kiln body 3, the materials move from the kiln head 301 to the kiln tail 302, when the materials move to the kiln tail 302, the temperature of the flue gas in the flue gas heat exchange tube 6 and the temperature of the flue gas in the flue gas secondary heat exchange cavity 8 continue to provide heat energy for the materials in the kiln body 3, so that the materials continue to carry out heating reaction, after a period of time, the materials are converted.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims (6)

1. The utility model provides an adopt gypsum gyration calcining kiln of binocular flue gas pipe, its includes feeder, steam exhaust pipe, the kiln body, flue gas chamber, flue gas import, flue gas heat exchange tube, flue gas exhaust case, flue gas secondary heat transfer chamber, flue gas circulation chamber, stock guide, wheel band, ring gear, radiating fin, pipeline lock ring and ejection of compact case, its characterized in that: the kiln body comprises a kiln head, a kiln tail and a sealing device; a water vapor exhaust pipe is arranged in the center of the kiln head; the feeder is fixed on the inner surface of the water vapor exhaust pipe; the central axis of the water vapor exhaust pipe is parallel to the central axis of the kiln body; the sealing device comprises a kiln head sealing device, a flue gas chamber sealing device, a flue gas exhaust box sealing device and a discharge box sealing device; the water vapor exhaust pipe and the kiln body are sealed by a kiln head sealing device; a smoke gas chamber is arranged on the outer surface of the kiln head; the inner surface of the kiln head is provided with a flue gas inlet; more than one flue gas heat exchange tube is arranged in the kiln body in the circumferential direction; the flue gas chamber is communicated with the flue gas heat exchange tube through a flue gas inlet; the flue gas chamber and the kiln body are sealed by a flue gas chamber sealing device; more than one flue gas pipeline support ring is arranged in the kiln body and fixed on the inner surface of the kiln body; the central axis of the heat exchange tube is parallel to the central axis of the kiln body; the pipeline support ring is used for fixing a flue gas heat exchange pipe arranged in the kiln body; the inner surface of the kiln tail is provided with a flue gas circulating chamber communicated with the flue gas heat exchange tube; the outer surface of the kiln tail is provided with a smoke secondary heat exchange cavity; the flue gas heat exchange tube is communicated with the flue gas secondary heat exchange cavity through the flue gas circulation chamber; the outer surface of the kiln tail is provided with a flue gas exhaust box; the flue gas exhaust box is communicated with the flue gas secondary heat exchange cavity; the flue gas exhaust box and the kiln body are sealed by a flue gas exhaust box sealing device; the inner surface of the kiln body is provided with a material guide plate and radiating fins; the wheel belt is fixed on the outer surface of the kiln body; the outer surface of the flue gas secondary heat exchange cavity is provided with a belt wheel and a gear ring; the secondary flue gas heat exchange cavity is communicated with the fixed parts of the belt pulley and the gear ring; the discharge box is arranged at the kiln tail; the discharge box and the kiln body are sealed by a discharge box sealing device.

2. The rotary gypsum calcining kiln adopting the double-drum flue gas pipe as claimed in claim 1, wherein: the feeder is fixed at the lower end of the axis of the water vapor exhaust pipe; the feeder is in a spiral forced propelling type; the feeder is provided with a feed inlet, a discharge outlet, a feed box, a spiral feed shaft and a motor, wherein the feed inlet is arranged outside the water vapor exhaust pipe, and the discharge outlet is arranged in the water vapor exhaust pipe; the lower surface of the feeder is contacted with the inner surface of the lower end of the axle center of the water vapor exhaust pipe; the water vapor exhaust pipe is a hollow cylinder; the water vapor exhaust pipe also comprises a vapor outlet and a vapor inlet; the steam outlet of the steam exhaust pipe is arranged on the outer surface of the steam exhaust pipe outside the kiln body; and the steam inlet of the steam exhaust pipe is arranged on the outer surface of the steam exhaust pipe in the kiln body.

3. The rotary gypsum calcining kiln adopting the double-drum flue gas pipe as claimed in claim 1, wherein: the flue gas chamber is in a long cubic shape; the flue gas inlet is an annular pipeline with an opening on the side surface, and the flue gas inlet and the kiln body are concentric and coaxial; the flue gas secondary heat exchange cavity is a hollow cylinder and is arranged on the outer surface of the kiln body in a wrapping mode; the flue gas circulation chamber is an annular pipeline with an opening on the side surface, and the flue gas circulation chamber is fixed on the inner surface of the kiln body and is concentric and coaxial with the kiln body.

4. The rotary gypsum calcining kiln adopting the double-drum flue gas pipe as claimed in claim 1, wherein: and the upper surface of the flue gas exhaust box is provided with a smoke exhaust port for exhausting flue gas after secondary utilization.

5. The rotary gypsum calcining kiln adopting the double-drum flue gas pipe as claimed in claim 1, wherein: the wheel belt arranged on the outer surface of the kiln body is positioned between the flue gas chamber and the flue gas exhaust box; the belt wheel arranged on the outer surface of the flue gas secondary heat exchange cavity is positioned at the kiln tail; and the gear ring arranged on the outer surface of the smoke secondary heat exchange cavity is positioned between the smoke exhaust box and the radiating fins.

6. The rotary gypsum calcining kiln adopting the double-drum flue gas pipe as claimed in claim 1, wherein: the material guide plate is positioned on the inner surface of the kiln head; the material guide plate is arranged between two adjacent flue gas heat exchange tubes; the radiating fins are positioned at the middle section of the kiln body; the radiating fins are arranged between two adjacent flue gas heat exchange tubes; the wing surfaces of the radiating fins are parallel to the central axis of the flue gas heat exchange tube.

Images