RU2777794C1 - Rotating furnace designed with the possibility of temperature control inside each segment of the rotating furnace - Google Patents

Abstract

FIELD: industrial equipment.

SUBSTANCE: invention relates to a rotating furnace made with the possibility of temperature control inside each segment of a rotating furnace. The furnace comprises a furnace body, a furnace cover located on the head of the furnace body, a furnace cover located on the tail of the furnace body, and a lower base, with a drive device located between the lower base and the body. The rotating furnace additionally comprises a fuel supply pipe having a feed segment, a connecting segment and a rotating segment, wherein the feed segment is fixed on the outer side wall of the furnace body, the rotating segment is located coaxially with the furnace body and is connected to the fuel supply source through a rotary joint, and the feed segment communicates with the rotating segment through a connecting segment, in this case, many groups of combustion components are located on the outer side wall of the furnace body in the axial direction of the furnace body and are rotatable together with the furnace body, and the fuel inlet of each of the combustion components is connected to the fuel supply pipe segment through the nozzle, and a valve for regulating fuel consumption is located on the nozzle, while the rotating segment is located at the loading end of the furnace body, one end of the connecting segment is connected to the specified rotating segment, and the other end of the connecting segment passes through the side wall of the furnace body and is connected to the feed segment.

EFFECT: possibility of segmented temperature control, so that it is possible to more accurately regulate the temperature field compared to a conventional rotating furnace, and thus thermal efficiency and productivity increase.

4 cl, 8 dwg

Description

BACKGROUND OF THE INVENTION

Technical field

[0001] The present invention relates to a furnace, and more particularly to a rotary kiln with the ability to control the temperature within each segment of the rotary kiln.

State of the art

[0002] In many industries such as building materials, metallurgy, chemical industry, environmental protection and the like, rotary cylinder equipment for mechanical, physical or chemical processing of solid materials is widely used. Equipment of this type is called a rotary kiln, whose technical characteristics and working condition to some extent determine the quality and cost of production in this enterprise. The design of the existing rotary kiln is as shown in FIG. eight.

[0003] The furnace body is supported by support wheels, and the drive device causes the furnace body to rotate about its axis. At one end of the kiln body is a burner that provides the heat needed to create a temperature field in the kiln body. Materials are loaded into the furnace body through the feed opening. During the rotation of the furnace body, the materials are twisted and thrown in the furnace body while they are simultaneously moving along the axis of the furnace body to the discharge end. At the same time, materials undergo physical, chemical or physico-chemical changes under the influence of heat. The burner is located at one end of the furnace body, so when the furnace body is long, it is difficult to control the temperature of each segment in the direction of the length of the furnace body, and it is difficult to consider all factors such as equipment performance, temperature distribution in the furnace body, and combustion atmosphere. The cross-sectional area productivity is low and the energy consumption per unit of end product is high.

[0004] To solve this problem, Patent Application No. 2017218534981 discloses an oscillating furnace having a burner placed on the side wall of the furnace body. Although the problem of inaccurate temperature control is solved, the furnace body can only swing, not rotate, which greatly limits the use of the furnace body.

DISCLOSURE OF THE INVENTION

[0005] In light of the above problems, the present invention provides a rotary kiln with temperature control within each segment of the rotary kiln. The furnace is able not only to control the temperature within each segment of the rotary kiln, but also to more accurately control the temperature field in the kiln, thus realizing the rotation. Compared with conventional rotary kilns, it has a wider range of applications.

[0006] The technical solutions applied in the present invention to overcome the above problems are as follows.

[0007] The rotary kiln, with the ability to control the temperature inside each segment of the rotary kiln, comprises a furnace body, a furnace cover located on the head of the furnace body, a furnace cover located on the tail of the furnace body, and a bottom base. A drive device is located between the lower base and the furnace body, and the rotary furnace additionally comprises a first fuel supply pipe having a supply segment, a connecting segment and a rotating segment. The supply segment is fixedly located on the outer side wall of the furnace body, the rotating segment is located coaxially with the furnace body and connected to the fuel supply source through a rotary joint, and the supply segment communicates with the rotating segment through the connecting segment. A plurality of groups of combustion components are located on the outer side wall of the furnace body , and the fuel inlet of each of the combustion components is connected to the supply segment of the first fuel supply pipe through the pipe.

[0008] In addition, each of the combustion components includes a burner, wherein the burner fuel inlet is connected to the supply segment of the first fuel supply pipe through a nozzle, and the burner air inlet is connected to the fan.

[0009] In addition, the burner lining located on the side wall of the furnace body is higher than the inner side wall of the furnace body.

[0010] In addition, a valve is placed on the nozzle.

[0011] In addition, a wheel belt and a drive gear are located on the furnace body. The wheel belt and the drive ring gear are provided with through holes, and the feed segment passes through the through holes of both of the wheel belt and the drive ring gear.

[0012] In addition, a rotating segment is located at the feed end of the furnace body, and one end of the connecting segment is connected to the specified rotating segment, and the other end of the connecting segment passes through the side wall of the furnace body and is connected to the feed segment.

[0013] In addition, the rotating segment is located at the discharge end of the furnace body.

[0014] In addition, the connecting segment is located in the furnace cover located on the head part of the furnace body, and the end portion of the feeding segment extends into the furnace cover located on the head part of the furnace body and is connected to the connecting segment.

[0015] In addition, the connecting segment is located in the radial direction.

[0016] In addition, first and second refractory lining bricks are interspersed in the furnace body and together form a serrated structure.

[0017] The technical result from the application of the present invention is as follows:

[0018] 1. On the side wall of the furnace body, a plurality of groups of combustion components are disposed and distributed in the axial direction, which facilitates the regulation of the temperature field and the atmosphere in the furnace body and improves the regulation accuracy.

[0019] 2. The number of combustion components, the intervals between them and the fuel consumption can be adjusted in accordance with the required temperature field in the furnace body, and, accordingly, it is possible to achieve the required temperature field with minimal energy consumption, and the requirements for equipment performance, temperature distribution in the kiln and combustion atmosphere, which increases the kiln productivity per unit segment and reduces energy consumption per unit of the final product.

[0020] 3. The furnace has the ability to both swing and rotate, which can meet the technological requirements for calcining various materials. Compared with a conventional rotary kiln, the kiln of the present invention has a wider range of applications.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 shows a front view of the oven.

[0022] FIG. 2 is a schematic view of an enlarged construction of part A of FIG. one.

[0023] FIG. 3 is a schematic view of an enlarged construction of part B of FIG. one.

[0024] FIG. 4 is a sectional view taken along line A-A in FIG. one.

[0025] FIG. 5 is a schematic view of an enlarged construction of part C of FIG. four.

[0026] FIG. 6 is a schematic view of the configuration of the first fuel supply pipe.

[0027] FIG. 7 is a schematic view of the configuration of the first fuel supply pipe according to the second embodiment.

[0028] FIG. 8 is a schematic view of the construction of a conventional rotary kiln.

[0029] Symbols in the drawings:

1 - furnace body,

11 - the first refractory lining,

12 - second refractory lining,

13 - burner lining,

14 - wheel belt,

2 - furnace cover, located on the tail of the furnace body,

21 - loading hole,

22 - guide pipe,

3 - furnace cover located on the head of the furnace body,

31 - unloading hole,

4 - bottom base,

41 - support roller,

51 - drive gear,

52 - drive ring gear,

53 - engine,

54 - gearbox,

6 - combustion component,

61 - burner,

62 - branch pipe,

63 - fan,

64 - valve,

7 - the first fuel supply pipe,

71 - feed segment,

72 - connecting segment,

73 - rotating segment,

8 - fuel supply source,

9 - rotary connection.

IMPLEMENTATION OF THE INVENTION

[0030] First Embodiment

[0031] As shown in FIG. 1, a rotary kiln with the ability to control the temperature inside each segment of the rotary kiln comprises a kiln body 1, a kiln cover 2 located at the tail or left end of the kiln body 1, and a kiln cover 3 located at the head or right end of the kiln body 1. Under the body 1 of the furnace is the lower base 4, which is connected to the body 1 of the furnace with the possibility of rotation.

[0032] In a specific embodiment, at least two wheel belts 14 are located in the furnace body 1. Two support rollers 41 are symmetrically located on the lower base 4 to support the furnace body 1, and these support rollers 41 are respectively located under the wheel belts 14. the belts 14 are respectively pressed against the support rollers 41.

[0033] In the furnace cover 2 located on the tail part of the furnace body, there is a feed opening 21 communicating with the body 1 through a guide pipe 22 extending to the interior of the furnace body 1 through the furnace cover 2 located on the tail part of the furnace body. At the lower end of the cover 3 of the furnace, located on the head of the furnace body, there is an unloading hole 31.

[0034] As shown in FIG. 4, first refractory lining bricks 11 and second refractory lining bricks 12 are interspaced in the furnace body 1, together forming a serrated structure.

[0035] Between the bottom base 4 and the oven body 1, a drive device is disposed for driving the oven body 1 into rotation. As shown in FIG. 1, the drive device includes a motor 53, a gearbox 54, a drive gear 51, and a drive gear 52. The output shaft of the motor 53 is connected to the input shaft of the gearbox 54, the output shaft of the gearbox 54 is connected to the drive gear 51, and the drive gear is located on the furnace body 1. a ring gear 52 engaged with a drive gear 51. Preferably, the drive gear 52 is located in the middle of the furnace body 1.

[0036] As shown in FIG. 1, FIG. 3 and FIG. 6, the first fuel supply pipe 7 is located on the furnace body 1 and includes a fuel supply segment 71, a connecting segment 72 and a rotating segment 73. The supply segment 71 is fixedly located on the outer side wall of the furnace body 1. The wheel belt 14 and the drive gear 52 are provided with through holes to allow the feed segment 71 to pass through them. The rotating segment 73 is located in the furnace cover 2 located on the tail part of the furnace body, coaxially with the furnace body 1 and passes through the furnace cover 2 located on the tail part of the furnace body, to the left to the area outside the furnace cover 2 located on the tail part of the furnace body . The connecting segment 72 is located inside the furnace body 1 on one side of the guide tube 22. One end of the connecting segment 72 is connected to the end section of the rotating segment 73, and the other end of the connecting segment 72 passes through the side wall of the furnace body 1 and is connected to the end section of the feed segment 71 . Preferably, the connecting segment 72 is located in the radial direction.

[0037] The rotating segment 73 of the first fuel supply pipe is connected to the fuel supply source 8 via a swivel 9. The design of the swivel 9 is known in the art and will not be re-described here.

[0038] As shown in FIG. 1, a plurality of groups of combustion components 6 are arranged on the outer side wall of the furnace body 1 in the axial direction. In a specific embodiment, four groups of combustion components 6 are located on the outer side wall of the furnace body 1. The fuel inlet of each of the combustion components 6 is connected to the supply segment 71 of the first fuel supply pipe 7 through a nozzle 62. The nozzle of each of the combustion components 6 passes through the side wall of the furnace body 1 into the furnace body 1.

[0039] In this case, the nozzle 62 may be a hose or a rigid pipe.

[0040] As shown in FIG. 2 and FIG. 5, each of the combustion components 6 comprises a burner 61 fixedly located on the furnace body 1, wherein the fuel inlet of the burner 61 of each of the combustion elements 6 is connected to the supply segment 71 of the first fuel supply pipe 7 through a pipe 62, and a valve is located on the pipe 62 64 to control fuel consumption. The burner air inlet 61 is connected to the fan 63.

[0041] In this case, the combustion component may also be a monolithic combustion element. However, in the preferred embodiment, the combustion component 6 uses a combined structure, mainly because the combustion component 6 rotates with the furnace body 1 during operation. Therefore, it is better that the combustion component 6 has a small volume. If a built-in combustion chamber is used, the rotation radius is large, and the size of other components must be proportionally adjusted according to the size of the combustion chamber, for example, the height of the lower base 4 and the like must be increased, and this may lead to an increase in the structural size of the entire equipment.

[0042] In addition, in order to prevent blockage of material in the furnace body 1 of the burner 61 during operation and to ensure the normal operation of the burner, as shown in FIG. 5, the burner lining 13 located on the side wall of the furnace body 1 is higher than the inner wall of the furnace body 12. However, prior art burner lining 13 and configuration are also used in conventional furnaces and will not be described again in this document.

[0043] Second Embodiment

[0044] As shown in FIG. 7, the rotating segment 73 is located in the oven cover 3 located on the head of the furnace body, coaxial with the furnace body 1, and the right end of the rotating segment 73 passes through the furnace cover 3 located on the head of the furnace body to the area outside of the furnace cover 3. located on the head of the furnace body.

[0045] In addition, during operation, in the furnace body 1, the temperature at the inlet end is lower than the temperature at the discharge end, and when the rotary segment 73 is placed in the furnace cover 3 located on the head of the furnace body, if the connecting segment 72 still housed in the furnace body 1, there is a safety hazard in the high temperature environment. To prevent this, as shown in FIG. 7, in the furnace cover 3 located on the head of the furnace body, there is a connecting segment 72, one end of which is connected to the end section of the supply segment 71, and this end section of the supply segment 71 extends inside the furnace cover 3 located on the head of the furnace body. Preferably, the connecting segment 72 is located in the radial direction. The rest of the structure is the same as in the first embodiment.

Claims (7)

1. A rotary kiln configured to control the temperature within each segment of the rotary kiln, comprising a kiln body, a kiln cover located on the head part of the kiln body, a kiln cover located on the tail part of the kiln body, and a bottom base, wherein between the bottom base and the body drive unit is located characterized in that the rotary kiln additionally comprises a fuel supply pipe having a supply segment, a connecting segment and a rotating segment, wherein the supply segment is fixedly located on the outer side wall of the furnace body, the rotating segment is located coaxially with the furnace body and is connected to the fuel supply source through a swivel joint and the supply segment communicates with rotating segment via connecting segment; and a plurality of groups of combustion components are located on the outer side wall of the furnace body in the axial direction of the furnace body and are rotatable together with the furnace body, wherein the fuel inlet of each of the combustion components is connected to the supply segment of the fuel supply pipe through a branch pipe, and a control valve is located on the branch pipe fuel consumption, while the rotating segment is located at the boot end of the furnace body, one end of the connecting segment is connected to the specified rotating segment, and the other end of the connecting segment passes through the side wall of the furnace body and is connected to the supply segment. 2. A rotary kiln capable of controlling the temperature within each segment of the rotary kiln according to claim 1, characterized in that each of the combustion components comprises a burner, the burner fuel inlet being connected to the supply segment of the first fuel supply pipe through a pipe, and the air inlet of the burner is connected to the fan. 3. A rotary kiln configured to control the temperature inside each segment of the rotary kiln, according to claim 1, characterized in that the drive device comprises a drive gear ring, a wheel belt and a drive gear ring are placed on the furnace body, both of which are equipped with through holes, and said feed segment passes through the through holes of the wheel belt and drive ring gear. 4. The rotary kiln configured to control the temperature within each segment of the rotary kiln according to claim 1, characterized in that the first refractory lining bricks and the second refractory lining bricks are spaced apart in the furnace body and together form a toothed structure.

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