CN213363310U

CN213363310U - Horizontal calcining furnace

Info

Publication number: CN213363310U
Application number: CN202022497128.7U
Authority: CN
Inventors: 赵勤理; 曹靖华; 王亮亮
Original assignee: Zhongyan Kunshan Co ltd
Current assignee: Zhongyan Kunshan Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-06-04
Anticipated expiration: 2030-11-02

Abstract

The application relates to a horizontal calcining furnace, which comprises a furnace body, a feeding pipeline communicated with one end of the furnace body and a discharging pipeline communicated with the other end of the furnace body, wherein the furnace body is obliquely arranged, one end of the furnace body, which is far away from the feeding pipeline, is a bottom end, and supporting components are fixedly arranged at two ends of the furnace body; a filter cylinder coaxial with the furnace body is fixedly arranged in the furnace body, and two ends of the filter cylinder are provided with openings; the interior of the furnace body is divided into a calcining area and an exhaust area by the filter cylinder, wherein the calcining area is positioned in the filter cylinder, one end of the exhaust area, which is far away from the feeding pipeline, is communicated with a plurality of exhaust pipes, and a sponge layer is fixedly arranged in the exhaust area; a heating pipe is fixedly arranged in the furnace body, two ends of the heating pipe respectively penetrate through two side walls of the furnace body, and the outer wall of the heating pipe is fixed with the circumferential inner side wall of the filter cylinder; the circumferential outer side wall of the furnace body is fixedly provided with a driving component for driving the furnace body to rotate. The method and the device have the advantages that the possibility of secondary reaction of the materials obtained by calcining in the furnace body is effectively reduced, and the calcining efficiency of the calcining furnace is improved.

Description

Horizontal calcining furnace

Technical Field

The application relates to the field of industrial alkali preparation, in particular to a horizontal calcining furnace.

Background

At present, the calcining furnace is widely applied to the field of preparation of industrial alkali; the calcining furnace is a device for smelting iron, recovering rare metals and producing special chemicals, and the working principle of the calcining furnace is that the fuels such as natural gas, oil, electricity and the like are used as energy sources to heat and calcine materials entering the calcining furnace.

The existing calcining furnace generally comprises a furnace body, a feeding pipeline communicated with one end of the furnace body, a discharging pipeline communicated with the other end of the furnace body and a heating assembly positioned in the furnace body, wherein powder sodium bicarbonate enters the calcining furnace from the feeding pipeline, and sodium carbonate is obtained and discharged from the discharging pipeline after being calcined and heated by the heating assembly in the calcining furnace.

In view of the above-described related art, the inventors considered that there was a drawback that secondary reaction of sodium bicarbonate in the calciner is liable to occur, resulting in a reduction in calcination efficiency of the calciner.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that a by-product obtained by calcination cannot be timely discharged from a calcination furnace, so that the calcination efficiency is lowered, the application provides a horizontal calcination furnace.

The horizontal calcining furnace provided by the application adopts the following technical scheme:

a horizontal calcining furnace comprises a furnace body, a feeding pipeline communicated with one end of the furnace body and a discharging pipeline communicated with the other end of the furnace body, wherein the furnace body is obliquely arranged, one end of the furnace body, far away from the feeding pipeline, is a bottom end, and two ends of the furnace body are fixedly provided with supporting components for supporting the furnace body; a filter cartridge coaxial with the furnace body is fixedly arranged in the furnace body, two ends of the filter cartridge are both provided with openings, and two ends of the filter cartridge are respectively fixed on two inner side walls of the furnace body; the interior of the furnace body is divided into a calcining area and an exhaust area by the filter cylinder, wherein the calcining area is positioned in the filter cylinder, the exhaust area is positioned between the circumferential inner side wall of the furnace body and the circumferential outer side wall of the filter cylinder, one end of the exhaust area, which is far away from the feeding pipeline, is communicated with a plurality of exhaust pipes, a sponge layer is fixedly arranged in the exhaust area, and the sponge layer is fixed with the circumferential inner side wall of the furnace body; a heating pipe is fixedly arranged in the furnace body, two ends of the heating pipe respectively penetrate through two side walls of the furnace body, and the circumferential outer side wall of the heating pipe is fixed with the circumferential inner side wall of the filter cylinder; the circumferential outer side wall of the furnace body is fixedly provided with a driving component for driving the furnace body to rotate.

By adopting the technical scheme, after the sodium bicarbonate to be calcined enters the furnace body through the feeding pipeline, the feeding pipeline is closed, hot steam is introduced into the heating pipe, and the driving assembly is controlled to enable the furnace body to start rotating; sodium bicarbonate is heated and decomposed to generate sodium carbonate, and byproducts of carbon dioxide, water vapor and a small amount of water; carbon dioxide, water vapor and a small amount of water enter the exhaust area through the filter cartridge, at the moment, the sponge layer can absorb the small amount of water entering the exhaust area, and the water vapor and the carbon dioxide are exhausted through the exhaust pipe; sodium carbonate obtained by calcining sodium bicarbonate is left in the calcining zone and is finally discharged from a discharge pipeline; carbon dioxide, water vapor and a small amount of water are discharged out of the calcining area in time, so that the possibility of secondary reaction between sodium carbonate and byproducts can be effectively reduced, and the calcining speed of the calcining furnace is effectively improved.

Optionally, the fan has all been set firmly to the one end of keeping away from the furnace body in the blast pipe, and the non-woven fabrics layer has all been set firmly to the one end that the blast pipe is close to the furnace body.

By adopting the technical scheme, the fan is opened when the calcining furnace starts to work, so that byproducts generated in the calcining process can be discharged out of the furnace body in time, the possibility of discharging powder from the exhaust pipe can be effectively reduced by the arrangement of the non-woven fabric layer, and the fan can be kept in a good working state.

Optionally, a heat insulation ring plate is fixedly arranged on the outer wall of the heating pipe, and the circumferential outer side wall of the heat insulation ring plate is fixed with the circumferential inner side wall of the filter cylinder; the circumferential side wall of the heat insulation annular plate is provided with a plurality of filtering holes.

By adopting the technical scheme, the arrangement of the filter cylinder and the heating pipe interval hot ring plate can effectively protect the filter cylinder so as to effectively reduce the damage of the filter cylinder caused by high temperature; the byproducts in the calcining zone can enter the exhaust zone through the filter holes.

Optionally, the heating pipes located in the furnace body are closely arranged on the circumferential inner side wall of the heat insulation annular plate, and the heating pipes located in the furnace body are distributed spirally.

By adopting the technical scheme, the contact area between the heating pipe and the powder is increased, so that the powder can be heated more fully, and the calcining speed of the calcining furnace is effectively improved.

Optionally, a heat transfer sheet is further fixedly arranged on the outer wall of the heating pipe, the heat transfer sheet is located on one side of the heating pipe, which is far away from the heat insulation annular plate, and the heat transfer sheet is made of a material easy to conduct heat; the filtering holes are also arranged on the heat transfer sheet.

By adopting the technical scheme, the arrangement of the heat transfer sheets further improves the heating range in the furnace body, and meanwhile, the arrangement of the heat transfer sheets effectively reduces the powder falling into the gaps of the heating pipes, thereby providing convenience for cleaning in the furnace body; the by-products in the calcination zone can pass through the filter holes into the exhaust zone.

Optionally, the position that heat transfer piece circumference inside wall corresponds the filtration pore all sets firmly the cotton layer of fire prevention.

By adopting the technical scheme, the fireproof cotton layer can effectively prevent powder from entering the filter holes, so that convenience is provided for cleaning a furnace body, and the calcination recovery rate of the powder is effectively improved; on the other hand, the fireproof cotton layer can absorb a small amount of water in the calcining area so as to reduce the possibility that the powder is adhered in the filter pores due to temporary moisture.

Optionally, the supporting component comprises a rotating shaft fixedly arranged at two ends of the furnace body and a supporting frame rotatably connected with the rotating shaft, wherein the two rotating shafts are collinear with the rotating axis of the furnace body, and the bottom end of the supporting frame is fixed on the ground.

Through adopting above-mentioned technical scheme, drive assembly drives the furnace body and rotates, and the axis of rotation can rotate along with the rotation of furnace body, and the setting of axis of rotation and support frame can be effectively supported the furnace body to the working process of messenger's furnace body is more stable.

Optionally, the drive assembly includes a rotating gear fixed to the outer circumferential side wall of the furnace body, a driving gear engaged with the rotating gear, and a driving motor fixed to a central shaft of the driving gear, wherein a supporting table for supporting the driving motor is fixed to the bottom end of the driving motor, the bottom end of the supporting table is fixed to the ground, a supporting plate for supporting the driving gear is fixed to the upper surface of the supporting table, and the driving gear is rotatably connected to the supporting plate.

By adopting the technical scheme, the driving motor is started, the driving motor drives the driving gear to rotate, the driving gear rotates to drive the rotating gear meshed with the driving gear to rotate, the rotating gear rotates to drive the furnace body to rotate, and the rotating gear, the driving gear and the driving motor are matched to effectively improve the control flexibility of the rotation of the furnace body; the support table can effectively support the driving motor, and the support plate can effectively support the driving gear, so that the working stability of the whole driving assembly is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. after entering the calcining zone, the sodium bicarbonate is heated by the heating pipe and then decomposed to generate sodium carbonate, carbon dioxide, water vapor and a small amount of water, the carbon dioxide, the water vapor and the small amount of water can enter the exhaust zone from the filter cylinder, the sponge layer can absorb the small amount of water, and the carbon dioxide and the water vapor are discharged from the exhaust pipe; the timely discharge of the by-products effectively improves the purity of the final sodium carbonate on one hand, and can effectively reduce the possibility of secondary reaction between the by-products and the sodium carbonate on the other hand, thereby improving the calcining speed of the calcining furnace;

2. after the calcining furnace starts to work, a fan is started, so that byproducts in the calcining zone can be discharged from an exhaust zone in time; the arrangement of the non-woven fabric layer can effectively reduce the possibility that powder is discharged from the exhaust pipe, and simultaneously can keep the fan in a good working state;

3. the arrangement of the heat transfer sheet can enlarge the heating range of the furnace body, so that the sodium bicarbonate can be heated more uniformly, and the calcining speed of the calcining furnace is effectively improved; the arrangement of the heat insulation plate can effectively protect the filter cylinder.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a sectional view showing the internal construction of the furnace body;

fig. 3 is a partial sectional view showing a fire-protecting cotton layer.

Description of reference numerals: 1. a furnace body; 11. a feed conduit; 111. a valve; 12. a discharge pipeline; 13. a calcination zone; 14. an exhaust area; 15. an exhaust pipe; 151. a fan; 152. a non-woven fabric layer; 16. heating a tube; 161. a heat transfer sheet; 1611. a fireproof cotton layer; 17. a sponge layer; 2. a support assembly; 21. a rotating shaft; 22. a support frame; 3. a filter cartridge; 31. a heat insulating ring plate; 311. filtering holes; 4. a drive assembly; 41. a rotating gear; 42. a driving gear; 43. a drive motor; 5. a support table; 51. and a support plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a horizontal calcining furnace.

Referring to fig. 1 and 2, the horizontal calcining furnace comprises a furnace body 1, support components 2 fixedly arranged at two ends of the furnace body 1, a filter cartridge 3 fixedly arranged in the furnace body 1, a heating pipe 16 fixedly arranged on the circumferential inner side wall of the filter cartridge 3, and a driving component 4 for driving the furnace body 1 to rotate; wherein, the two ends of the furnace body 1 are respectively communicated with a feeding pipeline 11 and a discharging pipeline 12, and the ends of the feeding pipeline 11 and the discharging pipeline 12 far away from the furnace body 1 are respectively fixedly provided with a valve 111; the furnace body 1 is arranged obliquely, and one end of the furnace body 1 communicated with the discharge pipeline 12 is a bottom end; the filter cartridge 3 is coaxial with the furnace body 1, two ends of the filter cartridge 3 are both provided with openings, and two ends of the filter cartridge 3 are respectively fixed with two inner side walls of the furnace body 1; the interior of the furnace body 1 is divided into a calcining zone 13 and an exhaust zone 14 by the filter cartridge 3, the calcining zone 13 is positioned in the filter cartridge 3, and the exhaust zone 14 is positioned between the circumferential outer side wall of the filter cartridge 3 and the circumferential inner side wall of the furnace body 1; a sponge layer 17 is fixedly arranged in the exhaust area 14, and the circumferential outer side wall of the sponge layer 17 is fixed with the circumferential inner side wall of the furnace body 1; an exhaust pipe 15 is connected to the exhaust area 14.

Before the furnace body 1 works, firstly introducing hot steam into the heating pipe 16, secondly opening the valve 111 on the feeding pipeline 11 to enable sodium bicarbonate to enter the furnace body 1 from the feeding pipeline 11, closing the valve 111 and controlling the driving assembly 4 to enable the furnace body 1 to start rotating; during the rotation process, the sodium bicarbonate can be continuously contacted with the heating pipe 16 and is decomposed into sodium carbonate, carbon dioxide, water vapor and a small amount of water after being heated, wherein the carbon dioxide, the water vapor and the small amount of water can enter the water discharging area through the filter cylinder 3, only the sodium carbonate is left in the calcining area 13, the carbon dioxide and the water vapor entering the exhaust area 14 can be discharged through the exhaust pipe 15, and the small amount of water is absorbed by the sponge layer 17; after the sodium bicarbonate in the furnace body 1 is completely decomposed, the driving assembly 4 is controlled to stop the furnace body 1 from rotating, the valve 111 on the discharge pipeline 12 is opened, the calcined sodium carbonate is discharged from the furnace body 1, and the furnace body 1 is inclined to provide convenience for discharging of the furnace body 1; carbon dioxide, water vapor and a small amount of water enter the exhaust area 14 and are finally discharged from the exhaust pipe 15, so that the possibility of secondary reaction between sodium carbonate and byproducts can be effectively reduced, and the calcining rate of the calcining furnace is effectively improved; the supporting component 2 can effectively support the furnace body 1 so as to improve the stability of the furnace body 1 during working; the sponge layer 17 can effectively adsorb a small amount of water entering the exhaust area 14, and meanwhile, due to the arrangement of the heating pipe 16, the sponge layer 17 can be repeatedly used, so that the service life of the sponge layer 17 is effectively prolonged.

Referring to fig. 1 and 2, the exhaust pipe 15 is open and has a smallest caliber at one end communicating with the exhaust area 14 and a largest caliber at the other end far away from the exhaust area 14; a fan 151 is fixedly arranged at one end of the exhaust pipe 15 far away from the exhaust area 14, and a non-woven fabric layer 152 is fixedly arranged at one end of the exhaust pipe 15 communicated with the drainage area; when the furnace body 1 starts to work, the fan 151 is turned on, and the fan 151 can timely discharge each gas in the furnace body 1 through the exhaust pipe 15; the provision of the nonwoven fabric layer 152 allows only the gas to be discharged from the exhaust pipe 15, and effectively improves the recovery rate of the sodium bicarbonate after calcination.

Referring to fig. 1, the support assembly 2 includes a rotating shaft 21 fixedly disposed at both ends of the furnace body 1, and a support frame 22 rotatably connected to the rotating shaft 21; wherein the rotating shaft 21 is collinear with the rotating shaft 21 of the furnace body 1, and the rotating shaft 21 can rotate along with the rotation of the furnace body 1; the supporting frame 22 and the rotating shaft 21 can effectively support the furnace body 1, so that the furnace body 1 can be more stable in operation.

Referring to fig. 1 and 2, the driving assembly 4 includes a rotating gear 41 fixedly disposed on the circumferential outer side wall of the furnace body 1, a driving gear 42 engaged with the rotating gear 41, and a driving motor 43 fixed to the driving gear 42, wherein a supporting table 5 is fixedly disposed at the bottom end of the driving motor 43, a supporting plate 51 is fixedly disposed on the supporting table 5, and the supporting plate 51 is rotatably connected to the central shaft of the driving gear 42; the support table 5 and the support plate 51 can effectively support the driving assembly 4 and the furnace body 1, so that the driving assembly 4 can be more stable when the furnace body 1 is driven to rotate.

Referring to fig. 2 and 3, a heat insulation ring plate 31 is fixedly arranged between the outer wall of the heating pipe 16 positioned in the furnace body 1 and the circumferential inner side wall of the filter cartridge 3, and a plurality of filter holes 311 are formed in the heat insulation ring plate 31; the heating pipes 16 positioned in the furnace body 1 are closely arranged on the circumferential inner side wall of the heat insulation annular plate 31, and the heating pipes 16 are spirally distributed; the close arrangement and spiral distribution of the heating pipes 16 can effectively enlarge the calcining range of the calcining furnace, thereby improving the calcining speed of the calcining furnace; each gas located in calcination zone 13 can pass through filter holes 311 and filter cartridges 3 into exhaust zone 14.

Referring to fig. 2 and 3, a heat transfer sheet 161 is fixedly disposed on an outer wall of the heating pipe 16, and the heat transfer sheet 161 is a heat conduction gasket; the circumferential outer side wall of the heat transfer sheet 161 is fixed with the outer wall of the heating pipe 16, and the filter holes 311 are also formed on the heat transfer sheet 161; fireproof cotton layers 1611 are fixedly arranged in the filtering holes 311 on the heat transfer sheet 161, and the side wall of the fireproof cotton layers 1611, which is opposite to the calcining area 13, is coplanar with the circumferential inner side wall of the heat transfer sheet 161; the arrangement of the heat transfer fins 161 effectively increases the heating range of the calcining furnace, and the arrangement of the heat transfer fins 161 provides convenience for cleaning the inside of the furnace body 1; the arrangement of the filter holes 311 and the fireproof cotton layer 1611 can effectively retain the powder in the calcining zone 13, effectively improve the recovery rate of the final sodium carbonate on one hand, and provide convenience for cleaning the inside of the furnace body 1 on the other hand.

The implementation principle of the horizontal calcining furnace in the embodiment of the application is as follows: introducing hot steam into the heating pipe 16, opening a valve 111 on the feeding pipeline 11, and adding sodium bicarbonate into the furnace body 1; the driving motor 43 is turned on, so that the driving motor 43 drives the driving gear 42 and the rotating gear 41 to rotate, and finally the furnace body 1 is driven to rotate, and the rotation of the furnace body 1 can make the materials in the furnace body 1 fully contact with the heating pipe 16, so that the materials are fully calcined; calcining sodium bicarbonate to obtain a product sodium carbonate and byproducts such as carbon dioxide, water vapor and the like; at this time, carbon dioxide, water vapor and a small amount of water can pass through the heat transfer sheet 161, the filtering holes 311 on the heat insulation annular plate 31 and the filter cartridge 3 in sequence and finally enter the exhaust area 14; the fan 151 should be kept in a working state, so that the by-products entering the exhaust area 14 can be discharged in time through the exhaust pipe 15, all the trace powder finally enters the exhaust area 14, and the arrangement of the non-woven fabric layer 152 can effectively retain the trace powder; after all the sodium bicarbonate in the furnace body 1 is calcined, the valve 111 on the discharge pipeline 12 is opened to discharge the materials from the discharge pipeline 12, and the inclination of the furnace body 1 provides convenience for the discharging of the calcining furnace; the by-products are discharged in time, so that the secondary reaction between the sodium carbonate obtained by calcination and the by-products is effectively reduced, and the calcination speed of the calciner is effectively improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a horizontal calcining furnace, includes furnace body (1), intercommunication at feed channel (11) of furnace body (1) one end to and the intercommunication at ejection of compact pipeline (12) of furnace body (1) other end, its characterized in that: the furnace body (1) is obliquely arranged, one end of the furnace body (1) far away from the feeding pipeline (11) is a bottom end, and two ends of the furnace body (1) are fixedly provided with supporting components (2) used for supporting the furnace body (1); a filter cartridge (3) coaxial with the furnace body (1) is fixedly arranged in the furnace body (1), two ends of the filter cartridge (3) are both provided with openings, and two ends of the filter cartridge (3) are respectively fixed on two inner side walls of the furnace body (1); the interior of the furnace body (1) is divided into a calcining area (13) and an exhaust area (14) by the filter cartridge (3), wherein the calcining area (13) is positioned inside the filter cartridge (3), the exhaust area (14) is positioned between the circumferential inner side wall of the furnace body (1) and the circumferential outer side wall of the filter cartridge (3), one end of the exhaust area (14) far away from the feeding pipeline (11) is communicated with a plurality of exhaust pipes (15), a sponge layer (17) is fixedly arranged in the exhaust area (14), and the sponge layer (17) is fixed with the circumferential inner side wall of the furnace body (1); a heating pipe (16) is fixedly arranged in the furnace body (1), two ends of the heating pipe (16) respectively penetrate through two side walls of the furnace body (1), and the outer wall of the heating pipe (16) is fixed with the circumferential inner side wall of the filter cylinder (3); the circumferential outer side wall of the furnace body (1) is fixedly provided with a driving component (4) for driving the furnace body (1) to rotate.

2. The horizontal calciner of claim 1 wherein: the one end of keeping away from furnace body (1) in blast pipe (15) all has set firmly fan (151), and blast pipe (15) are close to the one end of furnace body (1) and all have set firmly non-woven fabrics layer (152).

3. The horizontal calciner of claim 1 wherein: a heat insulation ring plate (31) is fixedly arranged on the outer wall of the heating pipe (16), and the circumferential outer side wall of the heat insulation ring plate (31) is fixed with the circumferential inner side wall of the filter cylinder (3); and a plurality of filtering holes (311) are formed in the circumferential side wall of the heat insulation annular plate (31).

4. A horizontal calciner according to claim 3 wherein: the heating pipes (16) positioned in the furnace body (1) are closely arranged on the circumferential inner side wall of the heat insulation annular plate (31), and the heating pipes (16) positioned in the furnace body (1) are distributed spirally.

5. A horizontal calciner according to claim 3 wherein: the outer wall of the heating pipe (16) is further fixedly provided with a heat transfer sheet (161), the heat transfer sheet (161) is located on one side, away from the heat insulation annular plate (31), of the heating pipe (16), and the heat transfer sheet (161) is made of heat-conducting materials easily.

6. The horizontal calciner of claim 5 wherein: the filtering holes (311) are further formed in the heat transfer sheet (161), and fireproof cotton layers (1611) are fixedly arranged on the circumferential inner side wall of the heat transfer sheet (161) corresponding to the positions of the filtering holes (311).

7. The horizontal calciner of claim 1 wherein: the supporting component (2) comprises rotating shafts (21) fixedly arranged at two ends of the furnace body (1) and supporting frames (22) rotatably connected with the rotating shafts (21), wherein the two rotating shafts (21) are collinear with the rotating shaft (21) line of the furnace body (1), and the bottom ends of the supporting frames (22) are fixed on the ground.

8. The horizontal calciner of claim 1 wherein: drive assembly (4) including set firmly at rotating gear (41) of furnace body (1) circumference lateral wall, with rotating gear (41) engaged with driving gear (42) and with driving gear (42) fixed driving motor (43) of center pin, wherein driving motor (43) bottom sets firmly brace table (5) that are used for supporting driving motor (43), brace table (5) bottom end is fixed subaerial, and brace table (5) upper surface sets firmly backup pad (51) that are used for supporting driving gear (42), driving gear (42) rotate to be connected on backup pad (51).