CN216204874U

CN216204874U - Box cylinder negative pressure indirect dryer

Info

Publication number: CN216204874U
Application number: CN202122323231.4U
Authority: CN
Inventors: 于乃有; 栾健; 栾禄春; 谭梅
Original assignee: Zhengyuanhe Changchun Biomass Technology Co ltd
Current assignee: Zhengyuanhe Changchun Biomass Technology Co ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-04-05
Anticipated expiration: 2031-09-23

Abstract

The utility model discloses a box cylinder negative pressure indirect dryer, relates to the technical field of material drying equipment, and solves the technical problems of low drying efficiency, high drying cost, low drying yield and poor drying effect of a dryer in the prior art. The drying device is technically characterized by comprising a square box body, a drying barrel and a high-temperature flue gas pipe, wherein the drying barrel penetrates through the square box body, the high-temperature flue gas pipe penetrates through the drying barrel, a front fan cover is installed at one end of the drying barrel, a gas conversion box is arranged at the front end of the front fan cover, the gas conversion box is communicated with one end of a connecting pipe, the other end of the connecting pipe is communicated with a cavity between the square box body and the drying barrel, a rear fan cover is installed at the other end of the drying barrel, and a moisture exhaust port is formed in the top end of the rear fan cover; a plurality of lifting blades are installed on the inner wall of the drying cylinder, and a plurality of hollow heat-conducting plates are arranged on the outer side of the circumference of the high-temperature flue gas pipe. The drying device has the beneficial effects of high drying efficiency, low drying cost, high drying yield and good drying effect.

Description

Box cylinder negative pressure indirect dryer

Technical Field

The utility model relates to the technical field of high-moisture material drying equipment, in particular to a box-cylinder negative pressure indirect type dryer which is suitable for drying high-moisture vinasse, bean dregs, traditional Chinese medicine dregs, edible fungus dregs, fermented feed and the like in the biomass material industry.

Background

At present, in the field of drying agricultural and sideline product residues, feed, organic fertilizer, mining, building materials, metallurgy and other materials, the drying equipment for the industrial residues mainly comprises a single-cylinder rotary dryer, a three-cylinder rotary dryer, a sawdust vacuum dryer, a tube bundle dryer and the like. Present rotation drying-machine all takes firework directly to go into in the section of thick bamboo of drying, firework and stoving material direct contact lean on the high temperature flue gas that contains mars to contact the moisture in the back with the material and evaporate out, and the moisture that evaporates out has mixed together with high temperature flue gas, makes originally dry flue gas become moist mist, has reduced the temperature of flue gas simultaneously, causes the stoving effect poor, and the stoving cost is high. Three section of thick bamboo rotation drying-machines are a big section of thick bamboo in the cover, the mode of a little section of thick bamboo of well cover, the material falls into a well section of thick bamboo by a little section of thick bamboo, it falls into a big section of thick bamboo to continue to walk in the narrow and small space that well section of thick bamboo and little section of thick bamboo become, then discharge after the narrow and small space that a big section of thick bamboo and a well section of thick bamboo formed continues to walk, at the in-process of whole material walking, the mist of flue gas and moisture is along with the material all the time and stirs together, it is dry in the environment of a large amount of moisture of sauna bath high temperature to lead to the stoving material, drying effect is not good, drying output is low, drying cost is high.

The indirect dryers in the market mainly comprise a sawdust vacuum dryer and a tube bundle dryer, and the vacuum dryer and the tube bundle dryer also have the problems of low drying efficiency and high drying cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a box-cylinder negative-pressure indirect dryer, which aims to solve the technical problems of low drying efficiency, high drying cost, low drying yield and poor drying effect of the dryer in the prior art.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

case section of thick bamboo negative pressure indirect drying-machine includes: the drying device comprises a square box body, a drying barrel and a high-temperature flue gas pipe, wherein the drying barrel penetrates through the square box body, the high-temperature flue gas pipe penetrates through the drying barrel, a front fan cover is installed at one end of the drying barrel, a gas conversion box is arranged at the front end of the front fan cover and is communicated with one end of a connecting pipe, the other end of the connecting pipe is communicated with a cavity between the square box body and the drying barrel, and one end of the high-temperature flue gas pipe penetrates through the front fan cover and is partially positioned in the gas conversion box;

the other end of the drying cylinder is provided with a rear fan cover, the top end of the rear fan cover is provided with a moisture discharge port, the moisture discharge port is connected with an external moisture introducing fan, and the drying cylinder forms negative pressure under the action of the moisture introducing fan;

a plurality of lifting blades are installed on the inner wall of the drying cylinder, and a plurality of hollow heat-conducting plates are arranged on the outer side of the circumference of the high-temperature flue gas pipe.

Furthermore, the square box body is provided with a burner connecting port and an ash removal port.

Further, the circumference side of high temperature flue gas pipe still installs T shape and scrapes the flitch, the flitch is scraped to T shape is close to the front end of a stoving section of thick bamboo, the front end of high temperature flue gas pipe is equipped with drive chain and tail end stabilizing bearing, works as a stoving section of thick bamboo is in when square box internal rotation, high temperature flue gas pipe under the effect that the motor drove drive chain with a stoving section of thick bamboo syntropy rotates to high temperature flue gas pipe rotational speed is greater than the rotational speed of a stoving section of thick bamboo.

Furthermore, a plurality of rectangular air ports are formed in the high-temperature flue gas pipe, the rectangular air ports are communicated with the hollow heat conducting plate, a plurality of square wind shields perpendicular to the high-temperature flue gas pipe are installed in the high-temperature flue gas pipe, and the area of each square wind shield is smaller than that of the cross section of the inner wall of the high-temperature flue gas pipe.

Further, still include feeding auger, feeding auger passes the preceding fan housing and part is in the section of thick bamboo of drying.

Furthermore, the material lifting plates are arranged above the hollow heat conducting plate, and a certain distance is reserved between the first material lifting plate at the front end and the last T-shaped material scraping plate.

Furthermore, the other end of the high-temperature flue gas pipe penetrates through the rear fan cover and is communicated with the smoke exhaust pipe.

Furthermore, the bottom of the rear fan cover is provided with a discharge hole.

Furthermore, a high-temperature-resistant sealing strip is arranged at the joint of the front fan housing, the rear fan housing and the drying cylinder.

Furthermore, a material baffle plate is arranged at one end, close to the driving chain, of the high-temperature flue gas pipe.

The utility model has the following beneficial effects:

according to the box barrel negative pressure indirect dryer, the material is indirectly dried by arranging the material raising plate and the hollow heat conducting plate, meanwhile, the moisture is easier to evaporate when the drying is carried out in a negative pressure environment, and the high-temperature flue gas enters the high-temperature flue gas pipe and the hollow heat conducting plate to heat the material in the whole process, so that the drying efficiency of the material can be improved; the flue gas is discharged through the smoke discharge pipe, the flue gas is not mixed with moisture evaporated, the heat loss is small, the drying efficiency is improved, the drying cost is reduced, the unit evaporation capacity of the dryer is high, and the high-temperature flue gas does not directly enter the drying cylinder to be contacted with the dried materials, so that the drying quality is good. The T-shaped scraping plate also has the function of cleaning the materials adhered to the inner wall of the front end of the drying cylinder, the application of the drying machine is wider, and the problem that the sticky materials are adhered to the wall is solved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural view of a drum negative pressure indirect dryer of the present invention;

fig. 2 is a schematic cross-sectional structure view of the drum negative pressure indirect dryer of the present invention.

The reference numerals in the figures denote:

1. feeding the auger; 2. a front fan housing; 3. front rolling ring; 4. a material raising plate; 5. a high temperature flue gas pipe; 6. a hollow heat conducting plate; 7. a square box body; 8. a drying drum; 9. a drive gear ring; 10. a rectangular tuyere; 11. rolling the ring at the back; 12. a moisture discharge outlet; 13. a rear fan cover; 14. a smoke exhaust pipe; 15. a discharge port; 16. a T-shaped scraping plate; 17. a drive gear; 18. a burner connector; 19. cleaning the ash hole; 20. a riding wheel; 21. a connecting pipe; 22. a gas transfer box; 23. a square wind deflector; 24. a high temperature resistant sealing tape; 25. a striker plate; 26. a drive chain; 27. and (5) stabilizing the bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, a drum negative pressure indirect dryer includes: the drying device comprises a square box body 7, a drying cylinder 8 and a high-temperature flue gas pipe 5, wherein the drying cylinder 8 penetrates through the square box body 7, the high-temperature flue gas pipe 5 penetrates through the drying cylinder 8, a front fan cover 2 is installed at one end of the drying cylinder 8, a gas conversion box 22 is arranged at the front end of the front fan cover 2, the gas conversion box 22 is communicated with one end of a connecting pipe 21, the other end of the connecting pipe 21 is communicated with a cavity between the square box body 7 and the drying cylinder 8, and one end of the high-temperature flue gas pipe 5 penetrates through the front fan cover 2 and is partially positioned in the gas conversion box 22;

a rear fan cover 13 is mounted at the other end of the drying cylinder 8, a moisture exhaust port 12 is formed in the top end of the rear fan cover 13, the moisture exhaust port 12 is connected with an external moisture inducing fan, and the drying cylinder 8 forms negative pressure under the action of the moisture inducing fan;

a plurality of lifting blades 4 are installed on the inner wall of the drying cylinder 8, and a plurality of hollow heat-conducting plates 6 are arranged on the outer side of the circumference of the high-temperature flue gas pipe 5.

The working principle is as follows: the drying cylinder 8 is provided with a front rolling ring 3 and a driving gear ring 9 on the outer circumferential side, the driving gear ring 9 is meshed with a driving gear 17, the driving gear 17 is connected with an external motor, the bottom of the front rolling ring 3 is provided with a riding wheel 20, the front rolling ring 3 and the driving gear ring 9 are respectively positioned on the outer sides of two ends of the square box body 7, and when the motor drives the driving gear 17 to rotate, the drying cylinder 8 rotates inside the square box body 7; the square box body 7 is connected with an external biomass burner, materials in the drying cylinder 8 can be dried through heat generated by the biomass burner, smoke generated by the biomass burner sequentially enters the high-temperature smoke pipe 5 and the hollow heat conducting plate 6 through the connecting pipe 21 and the gas conversion box 22 and heats the high-temperature smoke pipe 5 and the hollow heat conducting plate 6, and the materials in the drying cylinder are stirred by the material raising plate 4 and the hollow heat conducting plate 6 along with the rotation of the drying cylinder 8 and drive the materials to advance, so that the aim of indirect drying is fulfilled, and the materials can be dried quickly; the front fan cover 2, the rear fan cover 13 and the moisture exhaust port 12 are arranged, negative pressure is formed in the drying cylinder 8 under the action of an external moisture introducing fan, moisture of materials is evaporated quickly in a negative pressure environment, high-temperature smoke does not enter the drying cylinder and is mixed with the evaporated moisture, heat loss is small, and the drying efficiency of the materials can be improved;

the material is contacted in the whole process to achieve the drying purpose by arranging the material raising plate 4 and the hollow heat conducting plate 6, and the drying purpose is also achieved while the material flows in the drying cylinder 8; meanwhile, the drying is carried out in a negative pressure environment, so that the moisture is easier to evaporate, and the drying efficiency of the material can be improved; the flue gas is discharged through the smoke discharge pipe, the flue gas is not mixed with evaporated moisture, the heat loss is small, and the drying device has the beneficial effects of high drying efficiency, low drying cost, strong unit evaporation capacity, good drying quality and the like, and high-temperature flue gas does not directly enter the drying cylinder to contact with materials.

In some embodiments, the square box 7 has a burner port 18 and a deashing port 19.

Specifically, the burner connector 18 can be connected with an external biomass burner or a natural gas burner, and the biomass burner or the natural gas burner can directly heat the drying drum 8, so that the heat loss is greatly reduced; the ash removal port 19 can intensively remove dust generated by combustion of the biomass burner or the natural gas burner, so that the environment pollution is avoided.

In some embodiments, a T-shaped scraper 16 is further installed on the circumferential side of the high temperature flue gas pipe 5, the T-shaped scraper 16 is close to the front end of the drying cylinder 8, a driving chain 26 and a tail end stabilizing bearing 27 are arranged at two ends of the high temperature flue gas pipe 5, when the drying cylinder 8 rotates in the square box 7, the high temperature flue gas pipe 5 rotates in the same direction as the drying cylinder 8 under the action of the driving chain 26 driven by a motor, and the rotating speed of the high temperature flue gas pipe 5 is greater than that of the drying cylinder 8.

In some embodiments, the lifter plates 4 are above the hollow heat-conducting plates 6, and the first lifter plate 4 is spaced from the last T-shaped scraper plate (16).

Specifically, the high-temperature flue gas pipe 5 rotates in the same direction as the drying cylinder 8 under the action of the driving chain 26 driven by the motor, the rotating speed of the high-temperature flue gas pipe 5 is greater than that of the drying cylinder 8, and the hollow heat conducting plate 6 on the high-temperature flue gas pipe 5 and the material raising plate 4 on the drying cylinder 8 form a certain included angle with the axial direction of the dryer, so that the hollow heat conducting plate and the material raising plate can act in a synergistic manner, stir the material and push the material to advance, and the purposes of stir-drying the material and quickly evaporating the moisture of the material are achieved; the material lifting plate 4 and the hollow heat conducting plate 6 are both straight plates to form a certain angle, the material is just transferred to the hollow heat conducting plate 6 from the material lifting plate 4 according to the rotating direction of the material lifting plate 4 in front of the hollow material guiding plate 6, the material rotates along with the same direction of the drying cylinder 8 and the high-temperature flue gas pipe 5, the rotating speed of the high-temperature flue gas pipe 5 is greater than that of the drying cylinder 8, the material falls on the previous hollow heat conducting plate 6 through the high-temperature flue gas pipe 5, the material on the hollow heat conducting plate 6 falls on the previous material lifting plate 4, and meanwhile, the material falls on the inner wall of the drying cylinder 8, so that the material is always in an indirect heating state, and the purpose of quickly evaporating moisture is achieved; set up T and scrape flitch 16, its rotational speed of rotating simultaneously with high temperature flue gas pipe 5 is greater than drying cylinder (8), can scrape the material of 8 front end inner walls of drying cylinder, prevents that the material from bonding, causes the phenomenon of sticking with paste the pot, has guaranteed the stoving effect and the drying efficiency of material.

In some embodiments, a plurality of rectangular air ports 10 are formed in the high-temperature flue gas pipe 5, the rectangular air ports 10 are communicated with the hollow heat conducting plate 6, a plurality of square air baffles 23 perpendicular to the high-temperature flue gas pipe 5 are installed in the high-temperature flue gas pipe 5, and the area of each square air baffle 23 is smaller than that of the cross section of the inner wall of the high-temperature flue gas pipe 5.

Specifically, a plurality of square wind shields 23 arranged in the high-temperature flue gas pipe 5 change the walking route of part of the high-temperature flue gas, and part of the high-temperature flue gas enters the hollow heat conducting plate 6 through the rectangular air port 10 to heat the hollow heat conducting plate 6, so that the hollow heat conducting plate 6 has heat, and the drying efficiency of materials is improved.

In some embodiments, the drying device further comprises a feeding auger 1, wherein the feeding auger 1 penetrates through the front fan cover 2 and is partially positioned in the drying cylinder 8.

Specifically, set up feeding auger 1, can realize automatic feed, improved degree of automation, reduced artifical intensity of labour.

In some embodiments, the other end of the high temperature flue gas pipe 5 passes through the rear fan cover 13 and is communicated with the smoke exhaust pipe 14.

Specifically, the tail end of the high-temperature flue gas pipe 5 is embedded into the smoke exhaust pipe 14 and connected with the smoke guiding fan, under the action of the smoke guiding fan, high-temperature flue gas enters the high-temperature flue gas pipe 5 from a cavity formed by the square box body 7 and the drying cylinder 8 through the connecting pipe 21 and then enters the gas conversion box 22, part of the high-temperature flue gas enters the hollow heat-conducting plate 6 through the rectangular 10 air openings, and the high-temperature flue gas heats the high-temperature flue gas pipe 5 and the hollow heat-conducting plate 6; the smoke exhaust pipe 14 can be matched with an external smoke inducing fan to guide smoke to flow.

In some embodiments, the bottom of the rear hood 13 has a discharge hole 15.

The dried materials can be collected through the discharge hole 15.

In some embodiments, a high temperature sealing strip 24 is installed at the junction of the front hood 2 and the rear hood 13 with the drying drum 8.

Specifically, the high-temperature-resistant sealing strips 24 are adopted at the places where cold air is likely to enter, such as the front fan cover 2 and the rear fan cover 13, so as to prevent air from entering the drying cylinder 8, and negative pressure is formed in the drying cylinder 8 under the action of the moisture inducing fan, so that the evaporation speed of material moisture can be increased, and the drying efficiency is improved.

In some embodiments, a striker plate 25 is arranged at one end of the high temperature flue pipe 5 close to the driving chain 26.

Specifically, set up striker plate 25, can prevent that the material from falling to the outside, guaranteed the normal stoving of material.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. A drum negative pressure indirect dryer comprising: the drying device comprises a square box body (7), a drying cylinder (8) and a high-temperature flue gas pipe (5), and is characterized in that the drying cylinder (8) penetrates through the square box body (7), the high-temperature flue gas pipe (5) penetrates through the drying cylinder (8), a front fan cover (2) is installed at one end of the drying cylinder (8), a gas conversion box (22) is arranged at the front end of the front fan cover (2), the gas conversion box (22) is communicated with one end of a connecting pipe (21), the other end of the connecting pipe (21) is communicated with a cavity between the square box body (7) and the drying cylinder (8), and one end of the high-temperature flue gas pipe (5) penetrates through the front fan cover (2) and is partially positioned in the gas conversion box (22);

a rear fan cover (13) is mounted at the other end of the drying cylinder (8), a moisture exhaust port (12) is formed in the top end of the rear fan cover (13), the moisture exhaust port (12) is connected with an external moisture-inducing fan, and the drying cylinder (8) forms negative pressure under the action of the moisture-inducing fan;

a plurality of lifting blades (4) are installed on the inner wall of the drying cylinder (8), and a plurality of hollow heat-conducting plates (6) are arranged on the outer side of the circumference of the high-temperature flue gas pipe (5).

2. The drum negative pressure indirect dryer as claimed in claim 1, wherein the square box body (7) has a burner connection port (18) and a dust removal port (19).

3. The indirect oven with negative pressure for oven cylinder as claimed in claim 1, wherein a T-shaped scraper (16) is further installed on the circumferential side of the high temperature flue pipe (5), the T-shaped scraper (16) is close to the front end of the oven cylinder (8), the front end of the high temperature flue pipe (5) is provided with a driving chain (26) and a tail end stabilizing bearing (27), when the oven cylinder (8) rotates in the square box body (7), the high temperature flue pipe (5) rotates in the same direction as the oven cylinder (8) under the action of the driving chain (26) driven by the motor, and the rotating speed of the high temperature flue pipe (5) is greater than that of the oven cylinder (8).

4. The box-drum negative-pressure indirect dryer as claimed in claim 1, wherein a plurality of rectangular air ports (10) are formed in the high-temperature flue gas pipe (5), the rectangular air ports (10) are communicated with the hollow heat conducting plate (6), a plurality of square air baffles (23) perpendicular to the high-temperature flue gas pipe (5) are installed in the high-temperature flue gas pipe (5), and the area of each square air baffle (23) is smaller than that of the cross section of the inner wall of the high-temperature flue gas pipe (5).

5. The box drum negative pressure indirect dryer of claim 1, further comprising a feeding auger (1), wherein the feeding auger (1) penetrates through the front fan cover (2) and is partially positioned in the drying drum (8).

6. The box-drum negative-pressure indirect dryer as claimed in claim 5, wherein the material-raising plates (4) are above the hollow heat-conducting plates (6), and one side of the first plate close to the T-shaped material-scraping plate (16) is at a certain distance from the last T-shaped material-scraping plate (16) without mutual interference.

7. The box-drum negative pressure indirect dryer as claimed in claim 1, wherein the other end of the high temperature flue gas pipe (5) passes through the rear fan housing (13) and is communicated with the smoke exhaust pipe (14).

8. The drum negative pressure indirect dryer as claimed in claim 1, wherein the bottom of the rear hood (13) has a discharge outlet (15).

9. The negative-pressure indirect dryer of claim 1, wherein a high-temperature-resistant sealing strip (24) is installed at the junction of the front fan housing (2) and the rear fan housing (13) with the drying drum (8).

10. The drum negative pressure indirect dryer as claimed in claim 3, wherein a striker plate (25) is provided at one end of the high temperature flue gas pipe (5) close to the driving chain (26).