CN108088236A - Industry calcining shaft kiln - Google Patents
Industry calcining shaft kiln Download PDFInfo
- Publication number
- CN108088236A CN108088236A CN201810050340.3A CN201810050340A CN108088236A CN 108088236 A CN108088236 A CN 108088236A CN 201810050340 A CN201810050340 A CN 201810050340A CN 108088236 A CN108088236 A CN 108088236A
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- cylinder
- shaft kiln
- combustion
- air
- communicated
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- 238000001354 calcination Methods 0.000 title claims abstract description 64
- 239000000463 material Substances 0.000 claims abstract description 92
- 239000000446 fuel Substances 0.000 claims abstract description 49
- 238000002485 combustion reaction Methods 0.000 claims abstract description 44
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 22
- 239000003546 flue gas Substances 0.000 claims description 22
- 239000003517 fume Substances 0.000 claims description 12
- 239000011819 refractory material Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 241001416181 Axis axis Species 0.000 claims description 2
- 238000001727 in vivo Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 10
- 239000000843 powder Substances 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 7
- 235000011941 Tilia x europaea Nutrition 0.000 description 7
- 239000004571 lime Substances 0.000 description 7
- 239000010459 dolomite Substances 0.000 description 6
- 229910000514 dolomite Inorganic materials 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 241000276425 Xiphophorus maculatus Species 0.000 description 4
- 239000001095 magnesium carbonate Substances 0.000 description 4
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 4
- 235000014380 magnesium carbonate Nutrition 0.000 description 4
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 206010030973 Oral discomfort Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
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
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/005—Shaft or like vertical or substantially vertical furnaces wherein no smelting of the charge occurs, e.g. calcining or sintering furnaces
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
-
- 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
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/16—Arrangements of tuyeres
-
- 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
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/20—Arrangements of devices for charging
-
- 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
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/26—Arrangements of controlling devices
-
- 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
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/28—Arrangements of monitoring devices, of indicators, of alarm 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
-
- 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
- F27D19/00—Arrangements of controlling 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
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0034—Regulation through control of a heating quantity such as fuel, oxidant or intensity of current
- F27D2019/004—Fuel quantity
-
- 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
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0056—Regulation involving cooling
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Furnace Details (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
This technology offer is a kind of, and using gas, either liquid or powder is fuel, and calcining heat is more uniform, and product quality is more preferable, energy conservation and environmental protection, and shaft kiln is calcined in the industry that can be calcined to block either graininess or spherical shape material of high degree of automation.It includes cylinder, it sets to dose the feeding device of material and the exhaust apparatus for tail gas to be discharged into cylinder on cylinder top, combustion-supporting wind apparatus for being sent into from combustion air to cylinder and the device for discharging for material in cylinder to be discharged are set in cylinder lower part, cylinder at least one abrupt-change cross section between feeding device and combustion-supporting wind apparatus, size is smaller in the horizontal direction for the cylinder lumen on the abrupt-change cross section top, size is larger in the horizontal direction for the cylinder lumen of the abrupt-change cross section lower part, when material flows downward in cylinder, the cavity that material cannot reach naturally is formed at abrupt-change cross section lower part；The outlet of burner in fuel burner is communicated with the cavity, and fuel is sprayed from burner.
Description
Technical field
This technology is related to a kind of shaft kiln calcined to block either graininess or spherical shape material, especially with gas
Body either liquid either powder fuel calcined limestone, the calcining shaft kiln of dolomite and white with gas or liquid fuel calcining
The high temperature vertical kiln of marble/magnesite.
Background technology
Calcining shaft kiln is also referred to as shaft furnace, shaft furnace, roaster etc..
It is existing with the vertical of the gas either bulk or graininess of liquid or powder fuel or spherical shape material calcining
The shaft kiln of kiln, especially calcined limestone, dolomite, the material of calcining is the lump material of 40-80mm, with gas or liquid
The high temperature vertical kiln of fuel dolime/magnesite, the material generally calcined are 20-50mm pressure ball materials.This shaft kiln or
High temperature shaft furnace cannot all calcine the granular material of 1-15mm.The structure of this shaft kiln or high temperature shaft furnace generally comprises cylinder
Geometry is straight barrel, and cylinder upper end is provided with distribution device, cylinder lower end is provided with device for discharging, in device for discharging
Top have air-supply arrangement, the straight barrel periphery of the top of air-supply arrangement have fuel burner.
Generally using bell distributing device, either revolving top cloth or multi-point distribution, ore raw materials convey distribution device
It at the top of to cylinder, is sent by distributing device in cylinder, fuel is then sent by the fuel burner being mounted in kiln body in kiln
Burning.Since kiln cylinder body is a straight barrel, and fuel is directly sprayed onto after burner ejection on material, without combustion space,
Fuel and heat are difficult to deliver to the central part of kiln so that and it is uneven in same section edge and middle portion temperature, close to burning
Mouth and away from burner regional temperature is uneven, causes the product quality that this shaft kiln calcination comes out poor, raw burn and mistake
Burn all very serious, bulk density and to burn till state uneven.When especially burning the natural gas of high heating value, since local temperature is very high,
It easily causes material and sinters bulk into, burn out refractory material, the cycle of operation of kiln is short, and service life is short.This kiln is generally not
It is suitble to burn powder fuel.
Further, since charging, discharging, air blast mode, the limitation of fuel combustion, the thermal regulation in kiln is unstable.Institute
With this kiln type is progressively eliminated.
The content of the invention
The purpose of this technology is to provide one kind, and using gas, either as fuel, calcining heat is more uniform for liquid or powder,
Product quality is more preferable, energy conservation and environmental protection, and high degree of automation can forge block either graininess or spherical shape material
The industry calcining shaft kiln of burning.
Industry calcining shaft kiln described in this technology including cylinder, sets to dose material into cylinder on cylinder top
Feeding device and exhaust apparatus for tail gas to be discharged, set to be sent into helping for combustion air into cylinder in cylinder lower part
Wind apparatus and the device for discharging for material in cylinder to be discharged are fired, the cylinder between feeding device and combustion-supporting wind apparatus is at least
There are one abrupt-change cross sections, and size is smaller in the horizontal direction for the cylinder lumen on the abrupt-change cross section top, the cylinder of the abrupt-change cross section lower part
Size is larger in the horizontal direction for intracoelomic cavity, and when material flows downward in cylinder, forming material at abrupt-change cross section lower part cannot
Naturally the cavity reached；The outlet of burner in fuel burner is communicated with the cavity, and fuel is sprayed from burner.
As being further improved to above-mentioned industry calcining shaft kiln, feeding device includes charge pipe and distributing device；Cloth
Device is up-small and down-big bullet or plate column structure, and the port of export of charge pipe is located at cylinder top center, and with cylinder
It communicates in vivo, distributing device is located at the lower section of charge pipe outlet.Preferably, feeding device is arranged on outstanding up or down compared with cylinder
On rope or sunpender.Preferably, feeding device is can to lock the closed structure of wind.
Being further improved for shaft kiln is calcined as to above-mentioned industry, in cylinder, between feeding device and device for discharging
Also set up tripper；Preferably, which is up-small and down-big bullet or plate column structure, and is symmetrical using tubular axis
Axis axial symmetry；The bottom setting height(from bottom) of tripper is exported less than burner.Preferably, which passes through the supporting leg that is fixed on cylinder
Support, tripper and supporting leg are the internal hollow-core construction communicated, and inside leads to cooling wind, appearance laying refractory material.It is it is preferred that combustion-supporting
Wind apparatus includes blast cap and blast pipe, and blast cap upper end is communicated by communicating pipe with the hollow inside of tripper, combustion-supporting outside cylinder
Wind is communicated by reaching blast pipe, supporting leg, tripper, communicating pipe blast cap, blast cap outlet with inner barrel.
As being further improved to above-mentioned industry calcining shaft kiln, combustion-supporting wind apparatus includes blast cap and blast pipe, cylinder
External combustion air reaches blast cap by blast pipe, and blast cap outlet is communicated with inner barrel.
As being further improved to above-mentioned industry calcining shaft kiln, exhaust apparatus includes the flue gas with being communicated at the top of cylinder
Pipe, the fume pipe are sequentially connected in series with deduster, air-introduced machine, chimney.Preferably, which is equipped with three-way interface, three-way interface
Two outlets are divided into two tunnels, and by being connected with deduster, air-introduced machine, chimney, the second tunnel communicates the first via with the cavity.Most
It is good, as shown in Figure 4,5, installation and adjustment air door and air blower on the second road pipeline.
As being further improved to above-mentioned industry calcining shaft kiln, fuel burner further includes combustion air air feed and leads to
Road.Preferably, exhaust apparatus includes the fume pipe with being communicated at the top of cylinder, which is equipped with flue gas-air heat exchanger, combustion
Expect that the import of the combustion air intake adit of burner connects with the heat exchanger air outlet slit, heat exchanger air intlet and drum
Wind turbine connects.As shown in Figure 3.
The advantageous effect of this technology：
The calcining shaft kiln of the present invention, can be using gas, liquid, powder as the kiln type of the different purposes of fuel, the material of calcining
Can be that bulk, graininess, spherical shape/spheroid shape shape or other indefinite form shapes, the lime for mainly having lime burning, calcined dolomite in powder are stood
The high temperature vertical kiln of kiln, the graininess such as dolime sintering feed, magnesite or lump material calcines the pelletizing shaft furnace of iron ore,
Calcine shaft kiln of strontium carbonate, etc..
For ease of illustration facilitate, now using lime burning shaft kiln as illustrating case.
In use, material enters inner cylinder top continuously through feeding chamber 1, charge pipe 2, distributing device 6.Fuel then leads to
Piping is transported to fuel burner 8, and the flow of fuel is controlled by flow-meter, control valve, is sprayed into cylinder
Cavity burning, the cavity is combustion zone.
Combustion air is entered by blast pipe 13, blast cap 12 in kiln by air blower, and the fuel that rising and burner spray mixes
It closes, makes fuel combustion.Secondary Air is commonly referred to as into the combustion air in kiln by blast pipe 13, blast cap 12, Secondary Air is simultaneously
It is the cooling wind to material.
To be more advantageous to burning, combustion air intake adit is also designed in fuel burner.By fire wind intake adit into
The combustion air entered is commonly referred to as First air.
Therefore, usual combustion air can be divided into two parts, and a part blasts combustion zone by burner together with fuel, in addition
It is a part of then from then being blasted from the lower part cooling zone of kiln, carried out with lime after heat exchange cools down lime, be burning in combustion zone
Fuel provides the oxygen of heat.The flue gas of generation is then discharged from the fume pipe at top, and lime is then unloaded from kiln discharge port by device for discharging
Go out.Since kiln top is sealing, ambient atmos are not easily accessible in kiln, and kiln gas are not easy to leak, so being conducive to recycle tail
CO2 in gas.
Top feeding device, fuel burner, gas emission device, the cavity of combustion zone designed due to the present invention
Structure, middle part tripper, combustion-supporting wind apparatus, device for discharging etc., generate following effect：
1. material is entered by charge pipe in cylinder, due to having distributing device below charge pipe, so distributing device is formed below
There is no the non-material area 21 of the approximate semiellipse spherical shape of material, the sky that material cannot reach naturally is also formed in cylinder top peripheral
Between 22.
Due to the setting of distributing device 6, the cavity structure 23 of combustion zone and tripper 9, the cigarette that is generated after each burner combustion
Gas is mixed in cavity and communicated, and is equal in the pressure of cavity, so the high-temperature flue gas temperature being easily achieved in cavity
It spends equal；When high-temperature flue gas rises through material bed from combustion zone, the row of the horizontal cross-section high-temperature flue gas of same height is reached
Journey approximately equal, the material resistance approximately equal run into, so high-temperature flue gas is similar to equipressure in the section of sustained height in kiln
Face, high-temperature flue gas is easy in same height section flow and flow rate approximately equal, it is achieved thereby that temperature uniformly requires.
Similarly, due to the setting of distributing device 6, the cavity structure 23 of combustion zone and tripper 9, sustained height horizontal cross-section
Material, downlink reach cavity and tripper apart from approximately equal, it is approximate consistent mutually to squeeze stress, the speed of materials downward
Degree is approximate consistent, therefore, material and the biography received heat approximately equal of flue gas heat exchange, it is achieved thereby that material calcining is uniform
Property, uniformity, have basic guarantee to material calcining product quality.
It can be sufficiently mixed in the cavity 23 that fuel is formed at abrupt-change cross section with combustion air, burning is abundant.By to combustion
The selection and control of the parameters such as item kind and flow, combustion system, burner form, combustion-supporting gas, it is possible to cigarette after control burning
The temperature and heat of gas, to meet the setting technique requirement of calcining materials.Material forms the distribution of taper slope surface shape in tripper, point
Glassware controls the thickness of feed layer of material taper slope surface shape distribution, what the speed or material of material downlink stopped in furnace chamber body
Time is then controlled by device for discharging, this has just ensured the degree of burning till of calcined product.Substantially, the flue-gas temperature highest in cavity,
Environment temperature highest residing for tripper taper slope surface material, high-temperature flue gas rise through it is material bed after, material institute at distributing device
It is minimum to locate environment temperature.The material of tripper taper slope surface does not generate resistance substantially when heated to flue gas.It is formed after fuel combustion
High-temperature gas and material material is heated not only through heat radiation mode, also extend through the bed of material directly by with material mainly with right
It flows heat exchange method to heat material, so material heating is abundant.The cavity 23 formed at same abrupt-change cross section can be one
A or multiple, a plurality of cavities circumferentially can be connected to form an annular.There are many constructions for forming abrupt-change cross section, as long as material
When flowing downward in cylinder, the cavity that material cannot reach naturally is formed at abrupt-change cross section lower part.In abrupt-change cross section
The dead zone 24 being connected with cavity 23 is formed at top, is so conducive to increase the volume of cavity 23.
2. feeding device is moved up and down compared with cylinder, thus it is possible to vary the height of material in cylinder, to adapt to different-grain diameter
Material.The more relatively large material of physical dimension, smaller to the resistance of air-flow, the time of heat transfer and mass transfer inside material needs
It grows, the relatively small material of physical dimension is just big to the resistance of air-flow, and the time of heat transfer and mass transfer inside material needs
It is shorter.Therefore, to meet the requirement of materialbeds comminution and heat exchange, for large-sized material, charge pipe and distributing device compared with
The position of cylinder can be higher, and material is with regard to more in such cylinder.For the material of small particle, charge pipe and distributing device phase
Can be lower for the position of cylinder, material just lacks in such cylinder.Although in this way, large-sized material specific surface area
It is small, but the bed of material is thick in cylinder, and heat exchanger time is long；Although small particle material large specific surface area, the bed of material is thin in cylinder, heat exchange
Time is short, and can reach needs heat exchange effect.The effect of this feeding device can even realize small of 1-15mm of calcining
Grain material, this is that other known industrial furnaces do not have.
3. compared with existing industry calcining shaft kiln, not only the ratio of fuel and air is easy to get control, and fuel is burning
Area's burning is more uniform abundant, can be that oxidizing atmosphere can also be and it is possible to according to requirement control burning condition is burnt till
Reducing atmosphere.
4. continuous charging, continuous discharge can be realized, during the continuous downward movement of material, the resistance in kiln reduces, and same
The speed that one section material declines is close, and not only contributes to burning quality, also helps saving electricity.As needed, top
Can be positive pressure operation, it can also negative-pressure operation.System sealing is good, and the gas of generation does not leak, outside air also not interior leakage.
5. for requiring the shaft kiln that calcining heat is than relatively low and fuel value is high, by three-way interface the portion in fume pipe
Tail gas is divided to introduce in the cavity to be recycled（The partial tail gas circulatory system）, burning velocity can be adjusted and controlled, is reduced
Energy consumption（Such as Fig. 4, Fig. 5）, be conducive to reduce coefficient of excess air, ensure production normal operation, protection refractory material and
Equipment.
6. the quality of product can increase substantially, the waste-heat combustion air of tail gas is make use of, so also saves energy
Source.
7. for using compared with low calorie fuels, and the situation for requiring ignition temperature higher, use flue gas-air heat exchange
First air is heated, such as using blast furnace gas as fuel burnt lime, such as using natural gas as fuel calcined dolomite sintering feed
Deng（Such as Fig. 3, and this mode is conducive to the waste heat using tail gas）.
In conclusion the particular advantages that the industry calcining shaft kiln described in this technology has are：The material kind of adaptation and its
Geometry is in extensive range, and the usual 1-80mm of granular size can be adapted to；Product variety is various, lime, burnt dolomite etc.
The metallic mineral products such as nonmetal mineral product, pelletizing are all suitable for, and can also be used as incinerator, drying oven；The fuel range of adaptation
Extensively, gas, liquid, powder adapt to, and low heat value, high heating value are adapted to；The calcining heat of adaptation is extensive, 800-1900
It DEG C is adapted to；Oxidizing atmosphere and reducing atmosphere can use；System resistance is small, and can adjust, tripper taper slope
The material in face is heated but does not generate resistance to air-flow；Good seal performance, UTILIZATION OF VESIDUAL HEAT IN, good energy-conserving effect also help recycling profit
The tail gas generated with calcining shaft kiln；System sets the instrument such as corresponding temperature, pressure, flow, gas componant, high temperature TV, metering
And valve, PLC, it is easy to realize automation, intellectualized operation.
Industry calcining shaft kiln described in this technology can be with gas either liquid or powder fuel to it is block or
The calcining shaft kiln that granular or spherical shape material is calcined, such as the shaft kiln of calcined limestone, dolomite or with gas
The high temperature vertical kiln of body or liquid fuel dolime/magnesite.
Description of the drawings
Fig. 1 is the schematic diagram of the calcining shaft kiln of embodiment 1；
Fig. 2 is the schematic diagram of the calcining shaft kiln of embodiment 2；
Fig. 3 is the schematic diagram of the calcining shaft kiln of embodiment 3；
Fig. 4 is the schematic diagram of the calcining shaft kiln of embodiment 4；
Fig. 5 is the calcining shaft kiln schematic diagram of embodiment 5；
Fig. 6 is the calcining shaft kiln schematic diagram of embodiment 6；
Fig. 7 is schematic diagram of the calcining shaft kiln of embodiment 1 in fill material；
Fig. 8 is schematic diagram of the calcining shaft kiln of embodiment 4 in fill material.
In figure, feeding chamber 1, charge pipe 2, fume pipe 3, upper shell（With up big and down small conical lower portion）4, upper shell
（Straight tube shape）5, distributing device 6, middle cylinder body 7, upper middle cylinder body 71, lower middle cylinder body 72, fuel burner 8, tripper 9, supporting leg 10,
Lower shell 11, blast cap 12, blast pipe 13, discharge port 14, device for discharging 15, circulating flue gas air door 16, circulating flue gas one-way non-return
Valve 161, flue gas recirculation pipe 17, circulation of tail gas wind turbine 171, fuel burner combustion air intake adit 18, intake adit air blast
Machine 181, intake adit damper 182, flue gas-air heat exchanger 19, air-blaster 20, non-material area 21, space 22 are empty
Chamber 23, dead zone 24, suspension cable or sunpender 25, material 26.
Specific embodiment
Embodiment 1：
Referring to the industry calcining shaft kiln shown in Fig. 1,7, including straight-cylindrical upper shell 5, middle cylinder body 7, lower shell 11.In upper shell
5 tops set to dose the feeding chamber 1, charge pipe 2 and distributing device 6 of material into cylinder.The port of export of charge pipe is located at upper
Cylinder top center, and with being communicated in cylinder, distributing device is located at the lower section of charge pipe outlet.Charge pipe 2 can be compared with
Upper shell can stretch to change length（Being equivalent to charge pipe can move up and down compared with upper shell）.Distributing device 6 is upper small
Big bullet down, by suspension cable, either sunpender 25 is suspended at the top of upper shell and can adjust suspension cable or sunpender to change cloth
Then glassware rigidly fixes again compared with the upper-lower position of upper shell.
The discharge port 14 of 11 bottom of lower shell connects device for discharging 15.
It sets to be sent into the combustion-supporting wind apparatus of combustion air into cylinder on lower shell, combustion-supporting wind apparatus includes being supported on
The blast cap 12 of inner barrel and blast pipe 13, cylinder outside combustion air（Secondary Air）Blast cap, blast cap outlet are reached by blast pipe
It is communicated with inner barrel.
7 upper end center sections of middle cylinder body connect with 5 lower end of upper shell, and the upper-end inner diameter size of middle cylinder body 7 is more than under upper shell 5
Internal diameter size is held, forms an abrupt-change cross section, when material flows downward in cylinder, on abrupt-change cross section lower part, middle cylinder body 7 are interior
The cavity 23 that material cannot reach naturally is formed at portion periphery.
The outlet of burner 8 in fuel burner is communicated with the cavity 23, and combustion air intake adit 18 is around burner 8.
First air is provided by combustion air intake adit 18 so that the fuel combustion sprayed from burner is more abundant.
Tripper 9 is also set up in cylinder, between feeding device and device for discharging, which is up-small and down-big taper
Body, and using tubular axis as symmetry axis axial symmetry；The bottom setting height(from bottom) of tripper is exported less than burner, by being fixed on cylinder
On supporting leg 10 support.
Referring to Fig. 7, material 26 is entered by feeding chamber, charge pipe in cylinder, due to having distributing device below charge pipe, so
The non-material area 21 of the approximate half elliptic without material formed below of distributing device, material is also formed in cylinder top peripheral
The space 22 that cannot be reached naturally；Periphery at the top of upper shell is connected with fume pipe 3.Fume pipe 3 is communicated with space 22, and with
Deduster, air-introduced machine, chimney are connected.
Embodiment 2:
Industry calcining shaft kiln shown in Figure 2, essentially consists in the difference of embodiment 1：
Upper shell 4 in embodiment 2 is the upper shell for having up big and down small conical lower portion.So be conducive to air-flow and material
Heat exchange is more uniform.This structure can be used for the different industry calcining shaft kilns.
The suitable for reading of middle cylinder body 7 in embodiment 2 is other shaped, and the upper end periphery is upward, in abrupt-change cross section top shape
Into the dead zone 24 being connected with cavity 23.So be conducive to increase the volume of cavity 23.This structure can be used for different institutes
The industry calcining shaft kiln stated.
Tripper 9 and supporting leg 10 in embodiment 2 are the internal hollow-core construction communicated, and inside is logical to cool down wind, appearance laying
Refractory material.Blast cap upper end is communicated by communicating pipe with the hollow inside of tripper, combustion air outside cylinder（Secondary Air）Pass through
Blast pipe 13, supporting leg 10, reach blast cap 12 communicating pipe at tripper 9, and blast cap outlet is communicated with inner barrel.This structure can be with
For the different industry calcining shaft kilns.
Other structures are substantially the same manner as Example 1.
Embodiment 3：
Industry calcining shaft kiln shown in Figure 3, essentially consists in the difference of embodiment 1：
Upper shell 4 in embodiment 3 is the upper shell for having up big and down small conical lower portion.So be conducive to air-flow and material
Heat exchange is more uniform.This structure can be used for the different industry calcining shaft kilns
Fume pipe 3 in embodiment 3 is equipped with flue gas-air heat exchanger 19, the combustion air intake adit of fuel burner
18 import connects with 19 air outlet slit of heat exchanger, and heat exchanger air intlet connects with air blower 20.This structure can
For the different industry calcining shaft kilns.
Tripper 9 in embodiment 3 is hollow platy structure, and tripper setting height(from bottom) is exported less than burner, 9 He of tripper
Supporting leg 10 is the internal hollow-core construction communicated, and inside is logical to cool down wind, appearance laying refractory material.12 upper end of blast cap passes through communicating pipe
It is communicated with the hollow inside of tripper, combustion air outside cylinder（Secondary Air）Pass through blast pipe 13, supporting leg 10, tripper 9, connection
Pipe reaches blast cap 12, and blast cap outlet is communicated with inner barrel.This structure can be used for the different industry calcining shaft kilns.
Other structures are substantially the same manner as Example 1.
Embodiment 4：
Referring to the industry calcining shaft kiln shown in Fig. 4,8, essentially consisted in the difference of embodiment 1：
Upper shell 4 in embodiment 4 is the upper shell for having up big and down small conical lower portion.So be conducive to air-flow and material
Heat exchange is more uniform.Distributing device 6 in embodiment 4 is platy structure.The distributing device of this platy structure can be used for difference
Described industry calcining shaft kiln.
Fume pipe 3 in embodiment 4 is equipped with three-way interface, and two outlets of three-way interface are divided into two tunnels, and the first via passes through
It is connected with deduster, air-introduced machine, chimney, the second tunnel is to be in series with circulating flue gas damper 16, circulating flue gas one-way non-return
The flue gas recirculation pipe 17 of valve 161.After flue gas recirculation pipe 17 is in parallel with setting the pipeline of intake adit damper 182, with air feed
The import of passage air blower 181 is connected.The outlet of intake adit air blower 181 is supplied by the combustion air in fuel burner
Wind passage 18 is communicated with cavity 23.This structure can be used for the different industry calcining shaft kilns.
Tripper 9 and supporting leg 10 in embodiment 4 are the internal hollow-core construction communicated, and inside is logical to cool down wind, appearance laying
Refractory material.Blast cap upper end is communicated by communicating pipe with the hollow inside of tripper, combustion air outside cylinder（Secondary Air）Pass through
Blast pipe 13, supporting leg 10, reach blast cap 12 communicating pipe at tripper 9, and blast cap outlet is communicated with inner barrel.This structure can be with
For the different industry calcining shaft kilns.
Other structures are substantially the same manner as Example 1.
Embodiment 5:
Industry calcining shaft kiln shown in Figure 5, essentially consists in the difference of embodiment 1：
Fume pipe 3 in embodiment 5 is equipped with three-way interface, and two outlets of three-way interface are divided into two tunnels, the first via by with except
Dirt device, air-introduced machine, chimney are connected, and the second tunnel is by being in series with circulating flue gas damper 16, circulation of tail gas wind turbine 171, following
The flue gas recirculation pipe 17 of ring flue gas one way stop peturn valve 161 is communicated with the cavity 23.This structure can be used for different described
Industry calcining shaft kiln.
Tripper 9 in embodiment 5 is hollow platy structure, and this structure can be used for the different industry calcinings
Shaft kiln.Tripper setting height(from bottom) is exported less than burner, and tripper 9 and supporting leg 10 are the internal hollow-core construction communicated, and inside is logical cold
But wind, appearance laying refractory material.Blast cap upper end is communicated by communicating pipe with the hollow inside of tripper, combustion air outside cylinder
（Secondary Air）By blast pipe 13, supporting leg 10, tripper 9, reach blast cap 12 communicating pipe, blast cap outlet is communicated with inner barrel.
Other structures are substantially the same manner as Example 1.
Embodiment 6：
Industry calcining shaft kiln shown in Figure 6, essentially consists in the difference of embodiment 1：
Middle cylinder body 7 in embodiment 6 has two up and down：Upper middle cylinder body 71, lower middle cylinder body 72.Upper middle cylinder body 71 and 5 phase of upper shell
The place of connecing forms abrupt-change cross section, when material flows downward in cylinder, abrupt-change cross section lower part, on 71 internal upper part periphery shape of middle cylinder body
The cavity 23 that cannot be reached naturally into material；Upper-end inner diameter size with middle cylinder body 72 at present is more than upper 71 lower end necking of middle cylinder body
Locate internal diameter size, an abrupt-change cross section is formed, when material flows downward in cylinder, in the abrupt-change cross section lower part, lower middle cylinder body
72 internal upper part peripheries also form the cavity 23 that material cannot reach naturally.
Certainly, burner 8 and combustion air intake adit 18 are respectively connected in each abrupt-change cross section.At each abrupt-change cross section center
Place is respectively provided with tripper 9.
Other structures are substantially the same manner as Example 1.
Claims (10)
1. industry calcining shaft kiln including cylinder, sets to dose the feeding device and use of material into cylinder on cylinder top
In the exhaust apparatus for discharging tail gas, the combustion-supporting wind apparatus for being sent into combustion air into cylinder in cylinder lower part is set and is used for
The device for discharging that material in cylinder is discharged, it is characterized in that：Cylinder at least one between feeding device and combustion-supporting wind apparatus
A abrupt-change cross section, size is smaller in the horizontal direction for the cylinder lumen on the abrupt-change cross section top, in the cylinder of the abrupt-change cross section lower part
Size is larger in the horizontal direction for chamber, and when material flows downward in cylinder, forming material at abrupt-change cross section lower part cannot be natural
The cavity of arrival；The outlet of burner in fuel burner is communicated with the cavity, and fuel is sprayed from burner.
2. industry calcining shaft kiln as described in claim 1, it is characterized in that：Feeding device includes charge pipe and distributing device；Cloth
Device is up-small and down-big bullet or plate column structure, and the port of export of charge pipe is located at cylinder top center, and with cylinder
It communicates in vivo, distributing device is located at the lower section of charge pipe outlet.
3. industry calcining shaft kiln as claimed in claim 2, it is characterized in that：Feeding device is moved up and down compared with cylinder.
4. industry calcining shaft kiln as described in claim 1, it is characterized in that：In cylinder, between feeding device and device for discharging
Also set up tripper；The tripper is up-small and down-big bullet or plate column structure, and using tubular axis as symmetry axis axis
Symmetrically；The bottom setting height(from bottom) of tripper is exported less than burner.
5. industry calcining shaft kiln as claimed in claim 4, it is characterized in that：The tripper passes through the supporting leg branch that is fixed on cylinder
Support, tripper and supporting leg are the internal hollow-core construction communicated, and inside leads to cooling wind, appearance laying refractory material.
6. industry calcining shaft kiln as claimed in claim 5, it is characterized in that：Combustion-supporting wind apparatus includes blast cap and blast pipe, blast cap
Upper end is communicated by communicating pipe with the hollow inside of tripper, and combustion air passes through blast pipe, supporting leg, tripper, company outside cylinder
Siphunculus reaches blast cap, and blast cap outlet is communicated with inner barrel.
7. industry calcining shaft kiln as described in claim 1, it is characterized in that：Combustion-supporting wind apparatus includes blast cap and blast pipe, cylinder
External combustion air reaches blast cap by blast pipe, and blast cap outlet is communicated with inner barrel.
8. industry calcining shaft kiln as described in claim 1, it is characterized in that：Exhaust apparatus includes the flue gas with being communicated at the top of cylinder
Pipe, the fume pipe are equipped with three-way interface, and two of three-way interface outlets are divided into two tunnels, the first via by with deduster, air-introduced machine,
Chimney is connected, and the second tunnel is communicated with the cavity.
9. industry calcining shaft kiln as described in claim 1, it is characterized in that：Fuel burner further includes combustion air air feed and leads to
Road.
10. industry calcining shaft kiln as claimed in claim 9, it is characterized in that：Exhaust apparatus includes the cigarette with being communicated at the top of cylinder
Tracheae, the fume pipe are equipped with flue gas-air heat exchanger, import and the heat of the combustion air intake adit of fuel burner
Exchanger air outlet slit connects, and heat exchanger air intlet connects with air blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810050340.3A CN108088236B (en) | 2018-01-18 | 2018-01-18 | Industrial calcining vertical kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810050340.3A CN108088236B (en) | 2018-01-18 | 2018-01-18 | Industrial calcining vertical kiln |
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| CN108088236A true CN108088236A (en) | 2018-05-29 |
| CN108088236B CN108088236B (en) | 2024-06-18 |
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| CN201810050340.3A Active CN108088236B (en) | 2018-01-18 | 2018-01-18 | Industrial calcining vertical kiln |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108917414A (en) * | 2018-07-31 | 2018-11-30 | 中冶焦耐(大连)工程技术有限公司 | A kind of gas-solid heat exchange device and its working method |
| CN109405532A (en) * | 2018-11-26 | 2019-03-01 | 中冶焦耐(大连)工程技术有限公司 | A kind of dynamic plugging device when shaft furnace cloth |
| CN111039580A (en) * | 2020-01-03 | 2020-04-21 | 中冶长天国际工程有限责任公司 | Moving long-hole type lime shaft kiln material distribution system and material distribution method |
| CN111322866A (en) * | 2020-03-04 | 2020-06-23 | 高原晨曦 | Gasification and calcination device for low-calorific-value materials |
| CN112174548A (en) * | 2020-10-21 | 2021-01-05 | 南京苏冶钙业技术有限公司 | Shaft kiln discharge apparatus |
| CN114719619A (en) * | 2022-04-01 | 2022-07-08 | 合肥真萍电子科技有限公司 | Industrial furnace tail gas filter |
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