CN111121450A - Heat exchange device applied to kiln head cover of rotary kiln - Google Patents
Heat exchange device applied to kiln head cover of rotary kiln Download PDFInfo
- Publication number
- CN111121450A CN111121450A CN202010065191.5A CN202010065191A CN111121450A CN 111121450 A CN111121450 A CN 111121450A CN 202010065191 A CN202010065191 A CN 202010065191A CN 111121450 A CN111121450 A CN 111121450A
- Authority
- CN
- China
- Prior art keywords
- gas collecting
- rotary kiln
- hood
- heat exchange
- collecting tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005855 radiation Effects 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 abstract description 80
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003546 flue gas Substances 0.000 abstract description 10
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 3
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 3
- 239000004568 cement Substances 0.000 abstract description 3
- 238000000227 grinding Methods 0.000 abstract description 3
- 239000004571 lime Substances 0.000 abstract description 3
- 239000008188 pellet Substances 0.000 abstract description 3
- 239000003245 coal Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/38—Arrangements of cooling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to the technical field of production of rotary kilns such as lime, cement, pellets and the like, in particular to a heat exchange device applied to a kiln head cover of the rotary kiln. Comprises a lower gas collection tank, an upper gas collection tank, a radiant tube and a fan; the lower gas collecting tank and the upper gas collecting tank are arranged in a kiln head cover of the rotary kiln, the lower gas collecting tank and the upper gas collecting tank are connected through a radiation tube, and two ends of the radiation tube are respectively connected with the lower gas collecting tank and the upper gas collecting tank; the fan is connected with the lower gas collecting tank through an input pipeline, and the upper gas collecting tank is connected with an output pipeline. The radiant heat in the rotary kiln and the radiant heat of clinker in the cooler are collected, and the recovered heat can be selected to heat flue gas of a coal grinding system or heat combustion air of a burner so as to effectively utilize the heat.
Description
Technical Field
The invention relates to the technical field of production of rotary kilns such as lime, cement, pellets and the like, in particular to a heat exchange device applied to a kiln head cover of the rotary kiln.
Background
The rotary kiln is widely applied to the industries of lime, cement, pellets and the like as common thermal equipment. The rotary kiln is generally subjected to high-temperature forced calcination to enable materials to react quickly, a kiln head cover is used for sealing between a kiln head of the rotary kiln and cooling equipment, the inner wall of the kiln head cover is generally insulated by refractory materials to prevent the kiln head cover from being radiated by high temperature in the kiln, and the outer shell of the kiln head cover is made of steel plates. The calcining temperature of the materials in the rotary kiln reaches about 1250 ℃, the clinker temperature in the kiln head cooler is about 800 ℃, a large part of heat in the kiln head cover cannot be effectively utilized, waste is caused, and meanwhile, the heat radiation influences the surrounding environment.
Therefore, a heat exchange device is needed, which recovers a large amount of radiation heat in the kiln, reduces the influence of the radiation heat on the surrounding environment, and meanwhile, the recovered heat can be recycled, so that the energy consumption is saved, and the environment is protected.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a heat exchange device applied in a kiln head cover of a rotary kiln, which collects the radiation heat in the rotary kiln and the radiation heat of clinker in a cooler, and the recovered heat can be selected to heat flue gas of a coal grinding system or heat combustion-supporting air of a burner so as to effectively utilize the heat.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat exchange device applied in a kiln head cover of a rotary kiln comprises a lower gas collecting box, an upper gas collecting box, a radiation pipe and a fan; the lower gas collecting tank and the upper gas collecting tank are arranged in a kiln head cover of the rotary kiln, the lower gas collecting tank and the upper gas collecting tank are connected through a radiation tube, and two ends of the radiation tube are respectively connected with the lower gas collecting tank and the upper gas collecting tank; the fan is connected with the lower gas collecting tank through an input pipeline, and the upper gas collecting tank is connected with an output pipeline.
The lower gas collecting boxes are multiple, the fan is connected with the input main pipe, the input main pipe is divided into multiple input branch pipes, each input branch pipe is connected with one lower gas collecting box, and each input branch pipe is independently provided with a valve.
The upper gas collecting box is multiple, each upper gas collecting box is connected with one output branch pipe, each output branch pipe is independently provided with a valve, and the output branch pipes are converged into an output main pipe.
The valve adopts a metal hard sealing butterfly valve.
The radiant tube adopts the crisscross shape of S type double helix to arrange, and single radiant tube is S type spiral shape, and one row of S type spiral pipe levogyration direction is arranged, and two rows of S type spiral pipe dextrorotation directions are arranged, and with arranging the radiant tube spiral direction the same, two rows of spiral pipe intertwine.
The radiant tubes are in a serpentine coil form and are arranged in two rows, one row of radiant tubes and two rows of radiant tubes are arranged in a staggered mode in the horizontal direction and the vertical direction, and the rotation directions of the two rows of radiant tubes are opposite.
The lower gas collecting box is of a rectangular box structure, and the upper surface of the lower gas collecting box is provided with holes corresponding to the radiant tubes.
The top of the upper gas collecting box is in a shape corresponding to the radian of the top of the kiln head cover, and the bottom of the upper gas collecting box is in a rectangular structure and is provided with holes corresponding to the radiant tubes.
The rotary kiln hood also comprises a lower bracket and an upper bracket, wherein the lower gas collection box is fixedly connected in the rotary kiln hood through the lower bracket, and the upper gas collection box is fixedly connected in the rotary kiln hood through the upper bracket.
The lower gas collecting box, the upper gas collecting box, the radiant tube, the upper bracket and the lower bracket are all made of 0Cr18Ni9 material.
Compared with the prior art, the invention has the beneficial effects that:
1. the heat exchange device is hung in the kiln head cover, a large amount of heat is recovered by the fact that circulating gas absorbs radiation heat through the radiation tube, the recovered heat can heat the smoke entering the grinding system, and the smoke utilization efficiency is improved; the combustion air of the burner can be heated to absorb heat and reduce the heat value.
2. The energy is saved, the influence of heat radiation on the surrounding environment is reduced, the energy is saved, the consumption is reduced, and the environment protection is facilitated.
3. The radiant tubes are arranged along each direction of the kiln hood, the gas collecting tube adopts an S-shaped spiral or serpentine coil, so that the retention time of gas in the kiln is prolonged, the radiant heat in the kiln is absorbed to the maximum extent, the heat exchange area is large, and the heat efficiency is high; the heat exchange area of the radiant tubes is increased, thermal expansion is absorbed, and the heat absorption efficiency is improved due to the fact that the two rows of radiant tubes are spirally and alternately arranged.
4. The device has the advantages of simple structure, convenient maintenance, high efficiency and low cost.
Drawings
FIG. 1 is a front view of the present invention in a schematic configuration;
FIG. 2 is a sectional view taken along line A of FIG. 1;
FIG. 3 is a schematic front view of an S-shaped double helix radiant tube structure of the present invention;
FIG. 4 is a schematic diagram showing the positions of the openings of the upper and lower air-collecting boxes corresponding to the S-shaped double spiral radiant tube according to the present invention;
FIG. 5 is a schematic front view of a serpentine coil radiant tube configuration of the present invention;
FIG. 6 is a schematic view of the position of the openings of the upper and lower headers of the present invention corresponding to the serpentine coil radiant tube;
in the figure: 1-fan 2-lower gas collecting tank 3-radiant tube 4-upper gas collecting tank 5 a-first valve 5 b-second valve 5 c-third valve 5 d-fourth valve 5 e-fifth valve 5 f-sixth valve 61-input header 62-output header 71-lower bracket 72-upper bracket 8-kiln head cover
Detailed Description
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
example (b):
as shown in fig. 1 and 2, a heat exchanger applied in a kiln head cover of a rotary kiln comprises a fan 1, a lower gas collecting tank 2, a radiant tube 3, an upper gas collecting tank 4, a valve, a pipeline and a bracket.
The device is provided with three lower gas collection tanks 2, the lower gas collection tanks 2 are made of 0Cr18Ni9 material, the lower gas collection tanks 2 are of rectangular box type structures, the upper surfaces of the lower gas collection tanks are provided with round holes corresponding to the radiant tubes 3, and the diameters of the round holes are the same as the diameters of the radiant tubes 3. The lower gas collecting box 2 is welded with the steel structure in the kiln head cover 8 through a lower bracket 71.
The blower 1 adopts Roots blower with the flow of 6000m3And h, the fan 1 is arranged outside the lower gas collecting box 2, the input main pipe 61 is connected with the fan 1, the input main pipe 61 is divided into 3 input branch pipes, each input branch pipe is connected with one lower gas collecting box 2, each input branch pipe is independently provided with a valve which is respectively a first valve 5a, a second valve 5b and a third valve 5c, and the valves adopt metal hard sealing butterfly valves and are positioned outside the kiln head cover 8. LuoThe fan 1 pressurizes the flue gas (or air) to be heated and then conveys the flue gas (or air) to the three lower gas collecting boxes 2 through the three input branch pipes.
The three upper gas collecting boxes 4 are arranged, the upper gas collecting boxes 4 are made of 0Cr18Ni9 materials, the upper gas collecting boxes 4 are of rectangular box-type structures, round holes corresponding to the radiant tubes 3 are formed in the lower surfaces of the upper gas collecting boxes, and the diameters of the round holes are the same as the diameters of the radiant tubes 3. The upper gas collecting box 4 is fixedly connected in the kiln head cover 8 of the rotary kiln through an upper bracket 72. The top steel plate of the upper gas collecting box 4 is welded according to the shape of the radian of the top of the kiln head cover 8, the bottom of the upper gas collecting box is of a square structure, and the upper gas collecting box 4 is arranged along the long edge by the refractory material lining in the kiln head cover.
Each upper gas collecting box is connected with one output branch pipe, each output branch pipe is independently provided with a valve, namely a fourth valve 5d, a fifth valve 5e and a sixth valve 5f, and the valves adopt metal hard sealing butterfly valves. The plurality of output branches merge into an output manifold 62.
The number of the lower gas collection boxes 2 is three, the number of the upper gas collection boxes 4 is three, each lower gas collection box 2 and each upper gas collection box 4 form a group through a welded radiant tube 3, the total number of the groups is three, the three groups of the gas collection boxes are independently controlled through respective valves, and the application group number can be selected according to the flow of heating smoke (or air) required. The lower gas collection box 2 is a flue gas (or air) inlet, and the upper gas collection box 4 is a flue gas (air) outlet.
The radiant tubes 3 are arranged in two rows along the long edges of the upper gas collecting box 4 and the lower gas collecting box 2, and can be arranged in an S-shaped double-helix staggered shape or in a serpentine coil. The radiant tubes 3 are arranged and reserved with spaces needed by the devices such as burners, observation holes, discharge holes, massive material discharge holes and the like in the kiln head cover.
As shown in figures 3 and 4, the S-shaped double-helix staggered arrangement is adopted, a single radiant tube is in an S-shaped helical shape, a row of S-shaped helical tubes is arranged in the left-hand direction, a row of S-shaped helical tubes is arranged in the right-hand direction, the same row of radiant tubes are arranged in the right-hand direction, and the two rows of helical tubes are wound with each other. When the radiant tubes 3 are of an S-shaped double-spiral structure, each group of devices contains 12 radiant tubes, the total number of the three groups is 36, the tube diameter is 89mm, and the effective heat exchange area is about 57m2And the heat exchange area is twice of that of the horizontal straight pipe with the same structure.
As shown in fig. 5 and 6, the radiant tubes are arranged in two rows in a serpentine coil form, the radiant tubes in one row and the radiant tubes in the two rows are staggered in the horizontal and vertical directions, and the rotation directions of the two rows of radiant tubes are opposite. When the radiant tube 3 is of a serpentine coil structure, each group of devices is provided with 10 radiant tubes, the total number of the three groups is 30, the pipe diameter is 89mm, and the effective heat exchange area is about 30m2。
The specific working process of the invention is as follows:
after air at the room temperature of 20 ℃ or flue gas to be heated is pressurized by a Roots blower 1, a first valve 5a, a second valve 5b and a third valve 5c of three input branch pipes corresponding to a lower gas collection box 2 are opened as required, one group, two groups or three groups of heat exchange devices can be selected to work simultaneously according to the gas flow, the gas enters the lower gas collection box 2 and flows upwards into a radiation pipe 3 welded with the gas collection box, the ambient temperature in a kiln head cover is about 1000 ℃, the gas in the radiation pipe 3 is heated in the kiln head cover 8, the heated gas flows upwards to an upper gas collection box 4 after sufficient heat exchange, the upper gas collection box 4 is opened and corresponds to a fourth valve 5d, a fifth valve 5e and a sixth valve 5f, an output main pipe 62 for conveying the heated gas output from the upper gas collection box 4 and the outsides of the branch pipes of the upper gas collection box are used for heat preservation of rock wool-galvanized steel plates, the heated gas can be selected to, the utilization efficiency of the flue gas is improved; and combustion air of the burner can be selectively heated to absorb heat, reduce heat value and the like.
According to the invention, the heat exchange device is suspended in the kiln hood 8, a large amount of heat is recovered by the circulating gas absorbing radiation heat through the radiation tube 3, and the recovered heat can heat the flue gas entering the milling system, so that the utilization efficiency of the flue gas is improved; the combustion air of the burner can be heated to absorb heat and reduce the heat value. The energy is saved, the influence of heat radiation on the surrounding environment is reduced, the energy is saved, the consumption is reduced, and the environment protection is facilitated. The radiant tubes 3 are arranged along each direction of the kiln hood, the radiant tubes adopt S-shaped spiral or serpentine coil pipes, the residence time of gas in the kiln is prolonged, the radiant heat in the kiln is absorbed to the maximum extent, the heat exchange area is large, and the heat efficiency is high; the heat exchange area of the radiant tubes is increased, thermal expansion is absorbed, and the heat absorption efficiency is improved due to the fact that the two rows of radiant tubes are spirally and alternately arranged. The device has the advantages of simple structure, convenient maintenance, high efficiency and low cost.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides an use heat transfer device in rotary kiln hood cover which characterized in that: comprises a lower gas collection tank, an upper gas collection tank, a radiant tube and a fan; the lower gas collecting tank and the upper gas collecting tank are arranged in a kiln head cover of the rotary kiln, the lower gas collecting tank and the upper gas collecting tank are connected through a radiation tube, and two ends of the radiation tube are respectively connected with the lower gas collecting tank and the upper gas collecting tank; the fan is connected with the lower gas collecting tank through an input pipeline, and the upper gas collecting tank is connected with an output pipeline.
2. The heat exchange device applied to the hood of the rotary kiln as claimed in claim 1, wherein: the lower gas collecting boxes are multiple, the fan is connected with the input main pipe, the input main pipe is divided into multiple input branch pipes, each input branch pipe is connected with one lower gas collecting box, and each input branch pipe is independently provided with a valve.
3. The heat exchange device applied to the hood of the rotary kiln as claimed in claim 1, wherein: the upper gas collecting box is multiple, each upper gas collecting box is connected with one output branch pipe, each output branch pipe is independently provided with a valve, and the output branch pipes are converged into an output main pipe.
4. The heat exchange device applied to the hood of the rotary kiln as claimed in claim 2 or 3, wherein: the valve adopts a metal hard sealing butterfly valve.
5. The heat exchange device applied to the hood of the rotary kiln as claimed in claim 1, wherein: the radiant tube adopts the crisscross shape of S type double helix to arrange, and single radiant tube is S type spiral shape, and one row of S type spiral pipe levogyration direction is arranged, and two rows of S type spiral pipe dextrorotation directions are arranged, and with arranging the radiant tube spiral direction the same, two rows of spiral pipe intertwine.
6. The heat exchange device applied to the hood of the rotary kiln as claimed in claim 1, wherein: the radiant tubes are in a serpentine coil form and are arranged in two rows, one row of radiant tubes and two rows of radiant tubes are arranged in a staggered mode in the horizontal direction and the vertical direction, and the rotation directions of the two rows of radiant tubes are opposite.
7. The heat exchange device applied to the hood of the rotary kiln as claimed in claim 1, wherein: the lower gas collecting box is of a rectangular box structure, and the upper surface of the lower gas collecting box is provided with holes corresponding to the radiant tubes.
8. The heat exchange device applied to the hood of the rotary kiln as claimed in claim 1, wherein: the top of the upper gas collecting box is in a shape corresponding to the radian of the top of the kiln head cover, and the bottom of the upper gas collecting box is in a rectangular structure and is provided with holes corresponding to the radiant tubes.
9. The heat exchange device applied to the hood of the rotary kiln as claimed in claim 1, wherein: the rotary kiln hood also comprises a lower bracket and an upper bracket, wherein the lower gas collecting box is fixedly connected in the rotary kiln hood cover through the lower bracket, and the upper gas collecting box is fixedly connected in the rotary kiln hood cover through the upper bracket.
10. The heat exchange device applied to the hood of the rotary kiln as claimed in claim 1 or 9, wherein: the lower gas collecting box, the upper gas collecting box, the radiant tube, the upper bracket and the lower bracket are all made of 0Cr18Ni9 material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010065191.5A CN111121450A (en) | 2020-01-20 | 2020-01-20 | Heat exchange device applied to kiln head cover of rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010065191.5A CN111121450A (en) | 2020-01-20 | 2020-01-20 | Heat exchange device applied to kiln head cover of rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111121450A true CN111121450A (en) | 2020-05-08 |
Family
ID=70491546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010065191.5A Pending CN111121450A (en) | 2020-01-20 | 2020-01-20 | Heat exchange device applied to kiln head cover of rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111121450A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112254539A (en) * | 2020-09-11 | 2021-01-22 | 邓州中联水泥有限公司 | Rotary kiln waste heat comprehensive utilization system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201715854U (en) * | 2010-05-14 | 2011-01-19 | 攀枝花秉扬科技开发有限公司 | High-temperature circular preheater used for rotary kiln |
| CN203928775U (en) * | 2014-07-11 | 2014-11-05 | 尹小林 | A kind of rotary kiln head-shield waste heat that utilizes is for the device of cogeneration |
| CN106082272A (en) * | 2016-06-07 | 2016-11-09 | 无锡华光新动力环保科技股份有限公司 | A kind of urea pyrolysis ammonia-preparing device for cement kiln denitration and Ammonia Process thereof |
| CN106871654A (en) * | 2017-04-18 | 2017-06-20 | 长沙紫宸科技开发有限公司 | The carbon dioxide energy storage equipment of high temperature heat in accumulation kiln hood |
| CN211601536U (en) * | 2020-01-20 | 2020-09-29 | 中冶焦耐(大连)工程技术有限公司 | Heat exchange device applied to kiln head cover of rotary kiln |
-
2020
- 2020-01-20 CN CN202010065191.5A patent/CN111121450A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201715854U (en) * | 2010-05-14 | 2011-01-19 | 攀枝花秉扬科技开发有限公司 | High-temperature circular preheater used for rotary kiln |
| CN203928775U (en) * | 2014-07-11 | 2014-11-05 | 尹小林 | A kind of rotary kiln head-shield waste heat that utilizes is for the device of cogeneration |
| CN106082272A (en) * | 2016-06-07 | 2016-11-09 | 无锡华光新动力环保科技股份有限公司 | A kind of urea pyrolysis ammonia-preparing device for cement kiln denitration and Ammonia Process thereof |
| CN106871654A (en) * | 2017-04-18 | 2017-06-20 | 长沙紫宸科技开发有限公司 | The carbon dioxide energy storage equipment of high temperature heat in accumulation kiln hood |
| CN211601536U (en) * | 2020-01-20 | 2020-09-29 | 中冶焦耐(大连)工程技术有限公司 | Heat exchange device applied to kiln head cover of rotary kiln |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112254539A (en) * | 2020-09-11 | 2021-01-22 | 邓州中联水泥有限公司 | Rotary kiln waste heat comprehensive utilization system |
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