Rotary kiln cylinder heat collection system

Abstract

The utility model discloses a heat collection system of a rotary kiln barrel. The system comprises the rotary kiln barrel and a heat collection device, the arc-shaped plate is arranged on the upper side of the rotary kiln barrel, and the arc diameter of the arc-shaped plate is larger than the diameter of the rotary kiln barrel; the arc-shaped pipes are fixed to the arc-shaped inner side of the arc-shaped plate, and the arc-shaped pipes are arranged at intervals in the axis direction of the arc-shaped plate; the water inlet collecting pipe is arranged at the side part of the arc-shaped plate and is communicated with the plurality of arc-shaped pipes; the water outlet collecting pipe is arranged at the side part of the arc-shaped plate and is communicated with the plurality of arc-shaped pipes; the fixing frame is connected with the arc-shaped plate, and the fixing frame is used for fixing the arc-shaped plate to the upper side of the rotary kiln cylinder. The waste heat recovery device can recover waste heat on the surface of the rotary kiln cylinder, and has the advantages of being simple in structure, safe, reliable, energy-saving and environment-friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of energy-saving equipment, and further relates to a heat collection system for a rotary kiln cylinder body. Background Art

[0002] A rotary kiln is a calcination device used in the industrial field, and is mainly applied to industrial fields such as cement rotary kilns, lime rotary kilns, alumina clinker calcination kilns, kaolin calcination kilns, carbon calcination kilns, ore sand roasting, etc. For a rotary kiln with a daily output of 5000 t / d of clinker in a cement plant, the outer diameter of its kiln cylinder body is 4.2 - 5.0 m, and the outer surface temperature of the kiln cylinder body near the kiln head side can reach 320 - 350 °C; for a kaolin calcination kiln with an annual output of 200,000 tons, the diameter of its rotary kiln is 4.2 m, and the highest outer surface temperature of the kiln cylinder body can reach 280 °C, with a large amount of residual heat. The heat on the surface of the kiln cylinder body is directly released into the air in the form of radiation and convection, resulting in energy waste and environmental pollution.

[0003] Therefore, it is necessary to design a heat collection system for a rotary kiln cylinder body to solve the above problems. Summary of the Utility Model

[0004] Aiming at the above technical problems, the purpose of the utility model is to provide a heat collection system for a rotary kiln cylinder body, which can realize the recovery of the residual heat on the surface of the rotary kiln cylinder body, and has the advantages of safety and reliability, high recovery efficiency, energy conservation and environmental protection, and simple structure.

[0005] In order to achieve the above purpose, the utility model provides a heat collection system for a rotary kiln cylinder body, including:

[0006] A rotary kiln cylinder body;

[0007] An arc-shaped plate, arranged on the upper side of the rotary kiln cylinder body, and the arc diameter of the arc-shaped plate is larger than the diameter of the rotary kiln cylinder body;

[0008] A plurality of arc-shaped tubes, fixed on the inner side of the arc of the arc-shaped plate, and the plurality of arc-shaped tubes are arranged at intervals along the axial direction of the arc-shaped plate;

[0009] An inlet water collecting pipe, arranged on the side of the arc-shaped plate and communicated with the plurality of arc-shaped tubes;

[0010] An outlet water collecting pipe, arranged on the side of the arc-shaped plate and communicated with the plurality of arc-shaped tubes;

[0011] A fixing frame, connected with the arc-shaped plate, and the fixing frame is used to fix the arc-shaped plate on the upper side of the rotary kiln cylinder body;

[0012] A first water tank, and the first water tank is connected with the outlet water collecting pipe through a first pipeline;

[0013] A heat exchange station, the heat exchange station is connected to the first water tank through a second pipeline, and a first water pump is arranged on the second pipeline;

[0014] A second water tank, the second water tank is connected to the heat exchange station through a third pipeline, the second water tank is connected to the water inlet header through a fourth pipeline, and a second water pump is arranged on the fourth pipeline.

[0015] In some embodiments, it further includes:

[0016] A make-up water pipe, one end of the make-up water pipe is connected to the top of the second water tank, and the other end of the make-up water pipe is connected to treated softened water.

[0017] In some embodiments, it further includes:

[0018] A connecting pipe, both ends of the connecting pipe are respectively connected to the bottom of the first water tank and the bottom of the second water tank;

[0019] A first sewage pipe, connected to the bottom of the first water tank, and the first sewage pipe is used for discharging the sewage of the first water tank;

[0020] A second sewage pipe, connected to the bottom of the second water tank, and the second sewage pipe is used for discharging the sewage of the second water tank;

[0021] An overflow pipe, connected to the top of the second water tank.

[0022] In some embodiments, the central angle of the arc-shaped plate is not greater than 180°;

[0023] A plurality of support bars arranged at intervals are provided on the inner side of the arc-shaped plate, the support bars are arranged along the axis direction of the arc-shaped plate, the support bars are arranged between the arc-shaped plate and the arc-shaped pipe, and the support bars are fixedly connected to the arc-shaped plate and the arc-shaped pipe respectively.

[0024] In some embodiments, the arc-shaped plate is a steel plate, the support bars are steel bars, the arc-shaped pipes are steel pipes, the support bars are fixedly welded to the arc-shaped plate, and each arc-shaped pipe is fixedly welded to a plurality of the support bars respectively.

[0025] In some embodiments, a plurality of the arc-shaped pipes are at least divided into a group of arc-shaped pipe groups, and each group of arc-shaped pipe groups is respectively communicated with the water inlet header and the water outlet header;

[0026] The water inlet header and the water outlet header are respectively located on both sides of the arc-shaped plate, or, the water inlet header and the water outlet header are located on the same side of the arc-shaped plate.

[0027] In some embodiments, several of the arc-shaped tubes within each group of the arc-shaped tube groups are connected end to end in sequence and are arranged in a serpentine pattern along the axial direction of the arc-shaped plate.

[0028] In some embodiments, several of the arc-shaped tubes within each group of the arc-shaped tube groups are arranged at uniform intervals along the axial direction of the arc-shaped plate. One ends of the several arc-shaped tubes are respectively connected to the water inlet header, and the other ends of the several arc-shaped tubes are respectively connected to the water outlet header.

[0029] In some embodiments, it further includes:

[0030] A heat insulation layer, which is coated on the side of the arc-shaped plate away from the arc-shaped tubes.

[0031] In some embodiments, the fixing frame includes several vertical supports, several inclined supports, and a protective cover. The bottoms of the several vertical supports are fixed to the ground or a pedestal, the tops of the several vertical supports are fixedly connected to the bottom of the arc-shaped plate, the several inclined supports are arranged in a staggered manner among the several vertical supports, the protective cover is fixed to the tops of the vertical supports, and the water inlet header and the water outlet header are arranged inside the protective cover, so that the protective cover can protect and insulate the water inlet header and the water outlet header.

[0032] Compared with the prior art, the rotary kiln barrel heat collection system provided by the present utility model has the following beneficial effects:

[0033] In the present utility model, several arc-shaped tubes are fixed to the inner side of the arc-shaped plate through support bars, which has the advantages of stable structure and convenient processing; the radiation heat transfer is realized through the reasonable layout of several arc-shaped tubes, enhancing the heat transfer effect; arranging the water inlet header and the water outlet header on the side of the rotary kiln barrel is not only convenient for installation but also convenient for later maintenance; this system can recover the waste heat of the rotary kiln barrel, and has the advantages of energy conservation and environmental protection, simple structure, and high waste heat utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following will further illustrate the above-mentioned characteristics, technical features, advantages and their implementation manners of the present utility model in a clear and understandable manner in combination with the drawings of the preferred embodiments.

[0035] Figure 1 is a schematic structural diagram of the rotary kiln barrel heat collection system of the preferred embodiment of the present utility model;

[0036] Figure 2 is a partial structural schematic diagram of the rotary kiln barrel heat collection system of the preferred embodiment of the present utility model;

[0037] Figure 3It is a side view of the connection structure between the arc-shaped plate and the arc-shaped pipe, which is a preferred embodiment of the present utility model;

[0038] Figure 4 It is a top view of the connection structure of the arc-shaped pipe, which is a preferred embodiment of the present utility model;

[0039] Figure 5 It is a schematic structural diagram of the fixing bracket, which is a preferred embodiment of the present utility model.

[0040] Explanation of the reference numerals in the drawings:

[0041] Arc-shaped plate 1, arc-shaped pipe 2, water inlet header 3, water outlet header 4, fixing bracket 5, vertical support 51, inclined support 52, protective cover 53, support bar 6, rotary kiln shell 8, first water tank 9, heat exchange station 10, second water tank 11, first pipeline 12, second pipeline 13, third pipeline 14, fourth pipeline 15, first water pump 16, second water pump 17, make-up water pipe 18, connecting pipe 19, first sewage pipe 20, second sewage pipe 21, overflow pipe 22. Detailed implementation manners

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will describe the specific implementation manners of the present utility model with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other implementation manners can also be obtained.

[0043] To make the drawings concise, only the parts related to the utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation.

[0044] It should also be further understood that the term "and / or" used in the specification and appended claims of the present application refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0045] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0046] In addition, in the description of the present application, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0047] In one embodiment, referring to the attached drawings of the specification Figures 1 to 5 A heat collection system for a rotary kiln cylinder provided by the present utility model includes: a rotary kiln cylinder 8, an arc plate 1, a plurality of arc tubes 2, a water inlet header 3, a water outlet header 4, and a fixing frame 5. The arc plate 1 is arranged on the upper side of the rotary kiln cylinder 8, and the arc diameter of the arc plate 1 is larger than the diameter of the rotary kiln cylinder 8. A plurality of arc tubes 2 are fixed to the inner side of the arc of the arc plate 1, and the plurality of arc tubes 2 are arranged at intervals along the axial direction of the arc plate 1; the water inlet header 3 is arranged on the side of the arc plate 1 and communicates with the plurality of arc tubes 2; the water outlet header 4 is arranged on the side of the arc plate 1 and communicates with the plurality of arc tubes 2; the fixing frame 5 is connected to the arc plate 1, and the fixing frame 5 is used to fix the arc plate 1 on the upper side of the rotary kiln cylinder 8.

[0048] In the present utility model, a plurality of arc tubes 2 are arranged at intervals along the axial direction of the arc plate 1. The axial direction of the arc plate 1 is parallel to the axial direction of the rotary kiln cylinder 8. The water inlet header 3 and the water outlet header 4 are located at the ends of the arc tubes 2, that is, on the sides of the arc plate 1 and the rotary kiln cylinder 8. Arranging the water inlet header 3 and the water outlet header 4 on the side of the rotary kiln cylinder 8 not only facilitates installation but also facilitates subsequent maintenance; the heat exchange medium enters the plurality of arc tubes 2 through the water inlet header 3, absorbs the heat on the surface of the rotary kiln cylinder 8 and then enters the water outlet header 4, and is then transported to a remote end for heat storage or use; this device can realize the recovery of the waste heat of the rotary kiln cylinder and has the advantages of energy conservation, environmental protection, simple structure, and high waste heat utilization rate.

[0049] In one embodiment, referring to the attached drawings of the specification Figure 1 The heat collection system for the rotary kiln cylinder further includes: a first water tank 9, a heat exchange station 10, and a second water tank 11. The first water tank 9 is connected to the water outlet header 4 through a first pipeline 12; the heat exchange station 10 is connected to the first water tank 9 through a second pipeline 13, and a first water pump 16 is arranged on the second pipeline 13; the second water tank 11 is connected to the heat exchange station 10 through a third pipeline 14, and the second water tank 11 is connected to the water inlet header 3 through a fourth pipeline 15, and a second water pump 17 is arranged on the fourth pipeline 15.

[0050] Furthermore, the heat collecting system of the rotary kiln cylinder also includes: a make-up water pipe 18, a connecting pipe 19, a first sewage discharge pipe 20, a second sewage discharge pipe 21, and an overflow pipe 22. One end of the make-up water pipe 18 is connected to the top of the second water tank 11, and the other end of the make-up water pipe 18 is connected to treated softened water or other water sources. Both ends of the connecting pipe 19 are respectively connected to the bottom of the first water tank 9 and the bottom of the second water tank 11; the first sewage discharge pipe 20 is connected to the bottom of the first water tank 9, and the first sewage discharge pipe 20 is used for discharging the sewage in the first water tank 9; the second sewage discharge pipe 21 is connected to the bottom of the second water tank 11, and the second sewage discharge pipe 21 is used for discharging the sewage in the second water tank 11; the overflow pipe 22 is connected to the top of the second water tank 11 and is used for automatically discharging the excessive water in the second water tank 11.

[0051] In practical applications, the circulating water absorbs heat in the heat collecting device of the rotary kiln cylinder and is discharged from the water outlet header 4, and enters the first water tank 9 through the first pipeline 12 for temporary storage; when the heat exchange station 10 needs heat, by starting the first water pump 16 on the second pipeline 13, the hot circulating water is supplied to the heat exchange station 10. The heat exchange station 10 can obtain heat through radiation or directly take the hot circulating water. If the heat exchange station 10 obtains heat through radiation, the circulated water after heat exchange enters the second water tank 11 through the third pipeline 14 for temporary storage; if the heat exchange station 10 directly takes the hot circulating water, it is necessary to connect tap water or other water sources through the make-up water pipe 18 at the second water tank 11 for water replenishment. The circulating water in the second water tank 11 is pumped into the water inlet header 3 through the second water pump 17 on the fourth pipeline 15, and then enters a plurality of arc-shaped pipes 2 for heat exchange and is discharged from the water outlet header 4, and so on in a cycle.

[0052] In one embodiment, referring to the attached drawings of the specification Figures 2 to 5 , the central angle of the arc-shaped plate 1 is not greater than 180°. For example, the central angle of the arc-shaped plate 1 is equal to 180°, the coverage area of the arc-shaped plate 1 in the cross-section of the rotary kiln cylinder is equal to half of the cross-section of the rotary kiln cylinder, and the arc-shaped plate 1 is arranged above the left side or the right side of the rotary kiln cylinder 8. Of course, the arc-shaped plate 1 can also be arranged directly above the rotary kiln cylinder 8. A plurality of support bars 6 arranged at intervals are provided on the inner side of the arc-shaped plate 1. The support bars 6 are arranged along the axial direction of the arc-shaped plate 1. The support bars 6 are arranged between the arc-shaped plate 1 and the arc-shaped pipes 2, and the support bars 6 are respectively fixedly connected to the arc-shaped plate 1 and the arc-shaped pipes 2.

[0053] Specifically, the arc-shaped plate 1 is a steel plate, the support bars 6 are steel bars, the arc-shaped pipes 2 are circular arc-shaped steel pipes, the support bars 6 are fixedly welded to the arc-shaped plate 1, and each arc-shaped pipe 2 is respectively fixedly welded to a plurality of support bars 6. During processing, first, a plurality of support bars 6 are welded and fixed at intervals on the inner side of the arc-shaped plate 1 along the axial direction of the arc-shaped plate 1, and then each arc-shaped pipe 2 is spot-welded to a plurality of support bars 6 to fix the arc-shaped pipes 2, which has the advantage of high processing efficiency.

[0054] Furthermore, several arc-shaped tubes 2 are at least divided into a group of arc-shaped tube groups, and each group of arc-shaped tube groups is respectively communicated with the water inlet header 3 and the water outlet header 4. The water inlet header 3 and the water outlet header 4 are respectively located on both sides of the arc-shaped plate 1, or the water inlet header 3 and the water outlet header 4 are located on the same side of the arc-shaped plate 1.

[0055] Exemplarily, referring to the appended drawings of the specification Figure 4 , several arc-shaped tubes 2 within each group of arc-shaped tube groups are connected end to end in sequence and are arranged in a serpentine shape along the axial direction of the arc-shaped plate 1. The water inlet header 3 and the water outlet header 4 are respectively located on the same side of the arc-shaped plate 1, the water inlet header 3 is connected to one end of the arc-shaped tube group, and the water outlet header 4 is connected to the other end of the arc-shaped tube group.

[0056] Exemplarily, several arc-shaped tubes 2 within each group of arc-shaped tube groups are arranged at uniform intervals along the axial direction of the arc-shaped plate 1. The water inlet header 3 and the water outlet header 4 are respectively located on both sides of the arc-shaped plate 1. One ends of several arc-shaped tubes 2 are respectively connected to the water inlet header 3, and the other ends of several arc-shaped tubes 2 are respectively connected to the water outlet header 4. Of course, the above two methods can also be comprehensively applied to the heat collection device of the rotary kiln cylinder.

[0057] Referring to the appended drawings of the specification Figure 5 , the fixing frame 5 includes several vertical supports 51, several inclined supports 52 and a protective cover 53. The bottoms of several vertical supports 51 are fixed to the ground or a pedestal, and the tops of several vertical supports 51 are fixedly connected to the bottom of the arc-shaped plate 1. Of course, a connecting piece can also be provided between the vertical support 51 and the arc-shaped plate 1 to achieve their fixation. Several inclined supports 52 are arranged in a staggered manner among several vertical supports 51, and the protective cover 53 is fixed to the tops of the vertical supports 51. The water inlet header 3 and the water outlet header 4 are arranged inside the protective cover 53, so that the protective cover 53 can protect and thermally insulate the water inlet header 3 and the water outlet header 4.

[0058] Furthermore, referring to the appended drawings of the specification Figure 3 , the rotary kiln cylinder heat collection system further includes: a thermal insulation layer, and the thermal insulation layer is coated on the side of the arc-shaped plate 1 away from the arc-shaped tubes 2.

[0059] In this embodiment, several arc-shaped tubes 2 are fixed to the inner side of the arc-shaped plate 1 through the support bars 6, which has the advantages of stable structure and convenient processing; the radiation heat transfer is realized through the reasonable layout of several arc-shaped tubes 2 to enhance the heat transfer effect; this system can realize the recovery of the waste heat of the rotary kiln cylinder and has the advantages of energy conservation, environmental protection, simple structure and high waste heat utilization rate.

[0060] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0061] It should be noted that the above embodiments can be freely combined as needed. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A heat collection system for a rotary kiln cylinder, characterized in that, Comprising: The rotary kiln cylinder; An arc-shaped plate provided on the upper side of the rotary kiln cylinder, and the arc diameter of the arc-shaped plate is larger than the diameter of the rotary kiln cylinder; A plurality of arc-shaped tubes fixed to the inner side of the arc of the arc-shaped plate, and the plurality of arc-shaped tubes are arranged at intervals along the axial direction of the arc-shaped plate; An inlet water header provided on the side of the arc-shaped plate and communicating with the plurality of arc-shaped tubes; An outlet water header provided on the side of the arc-shaped plate and communicating with the plurality of arc-shaped tubes; A fixing frame connected to the arc-shaped plate, and the fixing frame is used to fix the arc-shaped plate on the upper side of the rotary kiln cylinder; A first water tank, and the first water tank is connected to the outlet water header through a first pipeline; A heat exchange station, the heat exchange station is connected to the first water tank through a second pipeline, and a first water pump is provided on the second pipeline; A second water tank, the second water tank is connected to the heat exchange station through a third pipeline, the second water tank is connected to the inlet water header through a fourth pipeline, and a second water pump is provided on the fourth pipeline.

2. The heat collection system for the rotary kiln cylinder according to claim 1, characterized in that Further comprising: A make-up water pipe, one end of the make-up water pipe is connected to the top of the second water tank, and the other end of the make-up water pipe is connected to treated softened water.

3. The heat collecting system for the rotary kiln cylinder according to claim 2, wherein, Further comprising: A connecting pipe, both ends of the connecting pipe are respectively connected to the bottom of the first water tank and the bottom of the second water tank; A first sewage pipe connected to the bottom of the first water tank, and the first sewage pipe is used for discharging sewage from the first water tank; A second sewage pipe connected to the bottom of the second water tank, and the second sewage pipe is used for discharging sewage from the second water tank; An overflow pipe connected to the top of the second water tank.

4. The rotary kiln cylinder heat collection system according to any one of claims 1-3, characterized in that The central angle of the arc-shaped plate is not greater than 180°; A plurality of support bars arranged at intervals are provided on the inner side of the arc-shaped plate, the support bars are arranged along the axial direction of the arc-shaped plate, the support bars are arranged between the arc-shaped plate and the arc-shaped tubes, and the support bars are fixedly connected to the arc-shaped plate and the arc-shaped tubes respectively.

5. The rotary kiln cylinder heat collection system according to claim 4, characterized in that The arc-shaped plate is a steel plate, the support bars are steel bars, the arc-shaped tubes are steel pipes, the support bars are fixedly welded to the arc-shaped plate, and each arc-shaped tube is fixedly welded to a plurality of the support bars respectively.

6. The rotary kiln cylinder heat collection system according to claim 4, characterized in that The plurality of arc-shaped tubes are at least divided into a group of arc-shaped tube groups, and each group of arc-shaped tube groups is respectively communicated with the inlet water header and the outlet water header; The inlet water header and the outlet water header are respectively located on both sides of the arc-shaped plate, or, the inlet water header and the outlet water header are located on the same side of the arc-shaped plate.

7. The rotary kiln cylinder heat collection system according to claim 6, characterized in that The plurality of arc-shaped tubes in each group of arc-shaped tube groups are connected end to end in sequence and are arranged in a serpentine shape along the axial direction of the arc-shaped plate.

8. The rotary kiln cylinder heat collection system according to claim 6, characterized in that A plurality of the arc-shaped tubes within each group of the arc-shaped tube groups are uniformly spaced along the axial direction of the arc-shaped plate. One ends of the plurality of arc-shaped tubes are respectively connected to the water inlet header, and the other ends of the plurality of arc-shaped tubes are respectively connected to the water outlet header.

9. The heat collection system for the rotary kiln cylinder according to claim 4, characterized in that, Further comprising: A heat insulation layer which is coated on a side of the arc-shaped plate away from the arc-shaped tubes.

10. The rotary kiln barrel heat collection system according to claim 1, wherein the fixing frame includes a plurality of vertical supports, a plurality of inclined supports, and a protective cover. Bottoms of the plurality of vertical supports are fixed on the ground or a base, tops of the plurality of vertical supports are fixedly connected to the bottom of the arc-shaped plate, the plurality of inclined supports are arranged in a staggered manner among the plurality of vertical supports, the protective cover is fixed on the tops of the vertical supports, and the water inlet header and the water outlet header are arranged within the protective cover, so that the protective cover can protect and insulate the water inlet header and the water outlet header.

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