CN213012687U - Indirect heating type low-temperature drying device - Google Patents

Abstract

The utility model discloses an indirect type low temperature mummification device, including inner tube, urceolus, material entry, flue gas entry, exhanst gas outlet, material export, vapor export and insulation material, the inner tube comprises a plurality of concave dividing wall fossil fragments circular revolving drum, and the furnace material can be held into to the concave dividing wall of inner tube, and insulation material sets up at outer section of thick bamboo internal surface, insulation material and the inner tube between be equipped with the clearance, the outer cavity formation flue gas convection channel that concave dividing wall and insulation material surrounded of inner tube. The utility model discloses the inner tube adopts a plurality of concave wall keels to constitute circular rotary drum, has effectively increased the heat transfer area of flue gas, makes material and inner tube heat transfer wall area of contact increase, and material mummification efficiency improves.

Description

Indirect heating type low-temperature drying device

Technical Field

The utility model belongs to the technical field of material mummification equipment technique and specifically relates to an indirect type low temperature mummification device is related to.

Background

At present, the main domestic and foreign domestic garbage treatment technology is landfill, incineration and composting, the pressure of incineration domestic garbage disposal is higher along with the reduction of landfill sites, the attention and worry of people are more and more caused by the harm of incineration discharge, and along with the improvement of environmental awareness, the acceptance of people is not high and the resistance is higher in a newly-built incineration project.

Compared with incineration, the household garbage pyrolysis technology is more environment-friendly, has low emission, basically does not generate dioxin under low-temperature pyrolysis, and is a relatively ideal new technology for treating the household garbage. When the domestic garbage pyrolysis disposal technology is used for treating the primary domestic garbage, the moisture content is high (more than 35%), the energy consumption and the scale of continuous pyrolysis are greatly influenced, and particularly, the moisture in the material is changed into pyrolysis water, so that the disposal is difficult and the cost is high. The household garbage materials are relatively miscellaneous, and the common drying furnace has relatively high requirements for the materials entering the furnace and can not meet the drying requirements of the pyrolysis preposed materials. The traditional method is that furnace feeding materials are treated by crushing, the materials are dried in a pyrolysis furnace after being unified in particle size, polygonal scrapers in the inner cylinder of the pyrolysis furnace stir the furnace feeding materials to enable the materials to move circularly along the inner cylinder, but when some thin and soft materials are dried in the furnace, the materials are easily wound with a rotary scraper in the inner cylinder of the pyrolysis furnace and are not suitable for drying treatment of the inner cylinder of the pyrolysis furnace.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide an indirect formula low temperature mummification device, can solve the interior section of thick bamboo mummification material of pyrolysis oven inhomogeneous, scraper blade winding material causes the rotatory inner tube of pyrolysis oven to rotate resistance increase or stall. Meanwhile, the inner cylinder of the pyrolysis furnace is of a circular smooth structure, the contact area of the material and the heat transfer wall is small, and the drying efficiency of the material is low.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: an indirect-heating low-temperature drying device comprises a bottom frame, an inner cylinder, an outer cylinder, a material inlet, a flue gas outlet, a material outlet, a water vapor outlet and a heat insulation material, wherein the outer cylinder is arranged on the bottom frame, and the inner cylinder is arranged in the outer cylinder; the material inlet is arranged at one end of the outer barrel and communicated with the inner barrel; the material outlet is arranged at the other end of the outer barrel and communicated with the inner barrel; the material enters from the material inlet, is dried and then is discharged from the material outlet, the smoke inlet is arranged at one end of the outer barrel, the smoke outlet is arranged at the other end of the outer barrel, and smoke enters from the smoke inlet, heats the outer surface of the inner barrel and then is discharged from the smoke outlet; the steam outlet is arranged at the material outlet end and discharges steam of heated materials, the inner cylinder is a circular rotary cylinder consisting of a plurality of concave partition keels, the concave partitions of the inner cylinder can contain the materials, the heat insulation material is arranged on the inner surface of the outer cylinder, a movable gap is arranged between the heat insulation material and the inner cylinder, and the cavity surrounded by the concave partitions of the inner cylinder and the heat insulation material forms a smoke convection channel.

An indirect-heating type low-temperature drying device has a simple inner cylinder structure, a plurality of concave partition wall keels are used for replacing a traditional polygonal scraper, and the flow of materials depends on the integral inclination of a rotating device and flows from a feeding end to a discharging end; compared with a rotary inner cylinder with a traditional structure, the rigidity of the section of the inner cylinder shape of the keel structure of the concave partition wall is increased, the thickness of a heat transfer wall can be correspondingly reduced, and the heat transfer rate is accelerated; the inner cylinder shape of the keel structure of the concave partition wall also increases the contact area of the material side, shortens the falling time of the material and reduces coking. The inner cylinder is made of stainless steel materials, when the temperature of the heat transfer wall is below 150 ℃, materials are added, the blanking time is shortened, and the heat transfer effect is obviously improved; the pyrolysis furnace is subjected to indirect-heating low-temperature drying, the temperature of the waste heat of flue gas is not high, the proportion of radiation heat transfer is low, and the inner cylinder of the keel structure of the concave partition wall mainly adopts flue gas convection heat transfer, so that the heat transfer efficiency and the heat exchange efficiency are effectively improved.

Furthermore, the inner cylinder is a circular rotary cylinder consisting of 5 concave partition keels, so that the manufacturing is simplest and most economic, and the heat transfer effect is most obvious.

Furthermore, sealing devices are arranged between the material inlet and the inner cylinder, between the material outlet and the inner cylinder, between the smoke inlet and the inner cylinder, and between the smoke outlet and the inner cylinder. Packing is used for sealing between the material inlet and the inner cylinder, graphite ring is used for dynamic sealing between the material outlet and the inner cylinder, and fish scales are used for sealing between the smoke inlet and the inner cylinder and between the smoke outlet and the inner cylinder. The material drying process is ensured to be carried out in a closed environment, and the influence of smoke on the surrounding environment is reduced.

Furthermore, the smoke channels of the keels of the concave partition walls of the inner cylinder are mutually isolated, namely, the thermal insulation material and the outer surface of the inner cylinder are correspondingly provided with partitions, so that the smoke convection channels of the keels of the concave partition walls of the inner cylinder are mutually and independently circulated. By increasing forced convection, the heat transfer efficiency is improved. In general, the heat insulation material is preferably heat insulation cotton.

The utility model relates to an indirect type low temperature mummification device can solve the interior section of thick bamboo mummification material of pyrolysis oven inhomogeneous, and scraper blade winding material causes the rotatory inner tube of pyrolysis oven to rotate resistance increase or stall. Meanwhile, the inner cylinder of the pyrolysis furnace is of a round smooth structure, the contact area of the material and the heat transfer wall is small, and the drying efficiency of the material is low. The utility model discloses the inner tube adopts a plurality of concave wall keels to constitute circular rotary drum, has effectively increased the heat transfer area of flue gas, makes material and inner tube heat transfer wall area of contact increase, and material mummification efficiency improves.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a three-dimensional structure diagram of an indirect low-temperature drying device;

FIG. 2 is a front view of an indirect-type low-temperature drying device;

FIG. 3 is a cross-sectional view of an inner cylinder of an indirect low temperature drying device;

FIG. 4 is a front view of an inner cylinder of an indirect-heating type low-temperature drying device;

description of reference numerals: 1. the device comprises a feeding screw device, a chassis, a large chain wheel, a small chain wheel, a chain, a motor, an inner cylinder, an outer cylinder, a front belt wheel, a rear belt wheel, a front supporting wheel, a rear supporting wheel, a front retaining wheel, a rear retaining wheel, a material inlet, a smoke outlet, a material outlet, a tail cover, a heat-insulating cotton, a partition, a smoke channel and a steam outlet, wherein the feeding screw device comprises 2, the chassis, 3, the large chain wheel, 4, the small chain wheel, 5, the chain, 6, the motor, 7, the inner cylinder, 8.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The present invention will be further explained with reference to the accompanying drawings, as shown in fig. 1 and fig. 2, an indirect low-temperature drying device has the following structure:

the chassis 2 is used for supporting and installing the whole device, a front riding wheel 11, a rear riding wheel 12, a front baffle wheel 13, a rear baffle wheel 14, a tail cover 19 and a motor 6 are supported, the motor 6 drives a small chain wheel 4, the small chain wheel 4 transmits power to a large chain wheel 3 through a chain 5, and the large chain wheel 3 drives an inner cylinder 7 to perform relative rotary motion; the inner cylinder 7 realizes rolling rotation on a front riding wheel 11 and a rear riding wheel 12 through a front belt wheel 9 and a rear belt wheel 10 respectively;

the feeding screw device 1 can be fixed on other platforms, material drying sealing is realized through front packing sealing and the inner cylinder 7, and the tail cover 19 and the inner cylinder 7 are sealed through rear dynamic sealing to prevent drying steam from leaking;

the outer cylinder 8 is fixed on the underframe 2, the inner cylinder 7 is arranged in the outer cylinder 8 and keeps the same concentricity with the outer cylinder, the outer cylinder 8 and the inner cylinder 7 are sealed through smoke, the smoke channel sealing during the rotary motion of the inner cylinder 7 is ensured, and the smoke leakage is prevented.

As shown in fig. 3 and 4, an internal cylinder structure of an indirect-heating type low-temperature drying device is as follows: the inner cylinder comprises 5 concave dividing wall keels which form a circular rotary cylinder, the concave dividing wall keels are formed by combining convex grooves and grooves, heat insulation cotton 20 is arranged between the outer cylinder and the inner cylinder, the heat insulation cotton is annularly arranged and clings to the inner side of the outer cylinder, a smoke channel 22 is formed between the heat insulation cotton and the concave dividing wall keels of the inner cylinder, particularly, a raised partition 21 is arranged on the heat insulation cotton, the smoke channel 22 between the heat insulation cotton 20 and the concave dividing wall keels of the inner cylinder 7 is mutually independent through the partition 21, smoke is further transmitted to the other end from one end of the outer surface of the inner cylinder 7, heat is transmitted to the outer wall of the inner cylinder through the smoke channel, then the inner wall of the inner cylinder transmits the. The efficiency of flue gas heat transfer is improved by forming flue gas convection. The front end of the inner cylinder 7 is hermetically connected with the feeding screw device 1, the rear end of the inner cylinder 7 is movably and hermetically connected with the tail cover 19, and the inner cylinder is loaded with materials to be dried. The material enters the inner cylinder from the upper part of a material inlet 15 of the feeding screw device 1, the material rotates along with the inner cylinder in a groove of the inner cylinder, the material is in a free falling state after being driven to a certain height, so that the material rolls and is heated in the inner cylinder uniformly, and the outer cylinder 8 and the inner cylinder 7 on the underframe 2 are provided with slopes, the general slope range is 3-5 degrees, the material moves from front to back under the gravity condition until the material flows to a material outlet 18 below the tail cover for discharging; the material drying steam is discharged out of the inner cylinder 7 through the steam outlet 23.

The flue gas inlet, the flue gas outlet and the inner cylinder ensure flue sealing during rotary motion of the inner cylinder through flue gas sealing, so that flue gas leakage is prevented; the feeding screw device 1 is fixed on other platforms, the feeding screw device and the inner barrel realize material internal sealing through a packing, and leakage of drying steam is prevented; the tail cover 19 and the inner cylinder 7 are sealed through a dynamic sealing element to prevent leakage of drying water vapor.

The utility model discloses the inner tube adopts a plurality of concave wall keels to constitute circular rotary drum, has effectively increased the heat transfer area of flue gas, makes material and inner tube heat transfer wall area of contact increase, and material mummification efficiency improves.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An indirect-heating low-temperature drying device comprises a bottom frame, an inner cylinder, an outer cylinder, a material inlet, a flue gas outlet, a material outlet, a water vapor outlet and a heat insulation material, wherein the outer cylinder is arranged on the bottom frame, and the inner cylinder is arranged in the outer cylinder; the material inlet is arranged at one end of the outer barrel and communicated with the inner barrel; the material outlet is arranged at the other end of the outer barrel and communicated with the inner barrel; the material enters from the material inlet, is dried and then is discharged from the material outlet, the smoke inlet is arranged at one end of the outer barrel, the smoke outlet is arranged at the other end of the outer barrel, and smoke enters from the smoke inlet, heats the outer surface of the inner barrel and then is discharged from the smoke outlet; the device is characterized in that the inner cylinder is a circular rotary cylinder consisting of a plurality of concave partition keels, the concave partitions of the inner cylinder can contain materials, the heat-insulating material is arranged on the inner surface of the outer cylinder, a movable gap is arranged between the heat-insulating material and the inner cylinder, and the outer concave partitions of the inner cylinder and a cavity surrounded by the heat-insulating material form a smoke convection channel.

2. The indirect-type low-temperature drying device as claimed in claim 1, wherein the inner cylinder is a circular rotary cylinder consisting of 5 concave partition keels.

3. The indirect-type low-temperature drying device as claimed in claim 1, wherein sealing means are arranged between the material inlet and the inner cylinder, between the material outlet and the inner cylinder, between the flue gas inlet and the inner cylinder, and between the flue gas outlet and the inner cylinder.

4. The indirect-heating low-temperature drying device as claimed in claim 3, wherein the material inlet and the inner cylinder are sealed by a packing, the material outlet and the inner cylinder are sealed by a graphite ring, and the flue gas inlet and the inner cylinder and the flue gas outlet and the inner cylinder are sealed by a fish scale.

5. The indirect-type low-temperature drying device as claimed in claim 2, wherein the insulation material is provided with partitions corresponding to the outer surface of the inner cylinder, so that the flue gas convection channel formed by the concave partitions outside the inner cylinder can independently circulate.

6. The indirect-type low-temperature drying device as claimed in claim 5, wherein the heat-insulating material is heat-insulating cotton.

7. The indirect-type low-temperature drying device as claimed in claim 6, wherein the heat-preservation cotton is annularly arranged and tightly attached to the inner side of the outer cylinder.

8. The indirect-type low-temperature drying device as claimed in claim 1, wherein the outer cylinder and the inner cylinder on the bottom frame are provided with slopes.

9. The indirect-type low-temperature drying device as claimed in claim 8, wherein the inclination of the outer cylinder and the inner cylinder on the bottom frame is 3-5 degrees.

10. The indirect-type low-temperature drying device as claimed in any one of claims 1 to 9, wherein the inner cylinder is made of stainless steel.

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