CN2365620Y - Decomposition furnace adapted to low volatile matter coal calcination - Google Patents

Decomposition furnace adapted to low volatile matter coal calcination Download PDF

Info

Publication number
CN2365620Y
CN2365620Y CN 99205793 CN99205793U CN2365620Y CN 2365620 Y CN2365620 Y CN 2365620Y CN 99205793 CN99205793 CN 99205793 CN 99205793 U CN99205793 U CN 99205793U CN 2365620 Y CN2365620 Y CN 2365620Y
Authority
CN
China
Prior art keywords
furnace
coal
low volatile
volatile matter
utility
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.)
Expired - Fee Related
Application number
CN 99205793
Other languages
Chinese (zh)
Inventor
狄东仁
陶从喜
彭守正
徐江东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TIANJING CEMENT INDUSTRY DESIGN INSTITUTE STATE BOARD OF ARCHITECTURAL MATERIAL
Tianjin Cement Industry Design and Research Institute Co Ltd
Original Assignee
TIANJING CEMENT INDUSTRY DESIGN INSTITUTE STATE BOARD OF ARCHITECTURAL MATERIAL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TIANJING CEMENT INDUSTRY DESIGN INSTITUTE STATE BOARD OF ARCHITECTURAL MATERIAL filed Critical TIANJING CEMENT INDUSTRY DESIGN INSTITUTE STATE BOARD OF ARCHITECTURAL MATERIAL
Priority to CN 99205793 priority Critical patent/CN2365620Y/en
Application granted granted Critical
Publication of CN2365620Y publication Critical patent/CN2365620Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Abstract

The utility model relates to a decomposition furnace adapted to low volatile matter coal calcination. The top end of a suspending furnace with a fluid bed is penetrated in the lower end of the side of a double-spray main furnace through a lifting pipeline, and the suspending furnace and the front and the back parts of the double-spray main furnace are connected into a furnace in series. The utility model the advantages that the decomposition furnace adapted to low volatile matter coal calcination prolongs the stay time of material and coal dust in the decomposition furnace adapted to low volatile matter coal calcination, fuel has complete combustion and quick combusting speed, the coal dust can be rapidly combusted out, and the utility model avoids clogging caused by blanking fluctuation without special requirement for the fineness of the coal dust sprayed in the decomposition furnace adapted to low volatile matter coal calcination and special coal dust combustor. The utility model solves the problem of low volatile matter coal on suspended preheating and decomposing process, and when the utility model is used for calcining cement clinker, the utility model can save the cost of coal 3 million yuan for cement plants of 1000t/d in one year.

Description

A kind of dore furnace that is applicable to low volatile coal calcination
The invention belongs to the coal calcination dore furnace, particularly a kind of dore furnace that is applicable to low volatile coal calcination.
At present, dore furnace is to adopt suspension preheating decomposition technique (NSP) to produce the core technology equipment of cement, have the dore furnace of all polymorphic types at present in the world, but most only be applicable to use more easily catch fire and the fuel of after-flame (as in, high-volatile bituminous coal, heavy oil, natural gas etc.), and can be applicable to that difficulty catches fire, the low-volatile coal of after-flame (containing anthracite) or other low-grade fuel person are very few for number, and come with some shortcomings, if any to the material bad adaptability of collapsing, the easy skinning of the vertical heating flue that has, the need volume that has is big, equipment is heavy or the like, along with scientific and technological progress, industrial development, the reasons such as needs of using energy source and fuel price and market competition, quality coal is preferably mostly supplied with coal chemical industry and metallurgical industry use, and is then more and more poor with the coal quality with cement rotary kiln.Current existing increasing rotary kiln cement factory requires to use inexpensive low-volatile bituminous coal even anthracite as the burning clinker of cement coal, so be necessary to innovate, improve or develop the decomposition type of furnace that is adapted to this class low-grade fuel.
The purpose of this invention is to provide a kind of dore furnace that is applicable to low volatile coal calcination, overcome above-mentioned shortcoming and defect.Solve the problem that the fine adaptation of dore furnace energy uses low-volatile coal or low grade coal, invented and designed and be with the other combined type dore furnace of putting the fluid bed shower furnace to be---a kind of dore furnace that is applicable to low volatile coal calcination.
The object of the present invention is achieved like this:
A kind of dore furnace that is applicable to low volatile coal calcination is characterized in that: constitute by being connected into a stove group behind the shower furnace of being with fluid bed and the two main stokeholds of spurting.
The top of the shower furnace of band fluid bed feeds two main stove lower ends of spurting by increase in pipeline.
The top of the shower furnace of band fluid bed is fed the side lower end of two main stoves that spurt by the increase in pipeline that has the reverse U shape pipeline.
The cylinder of shower furnace part is reducing shape also.
The advantage that the present invention is ordered is:
Dore furnace of the present invention relatively sees Table 1 with the pluses and minuses of the existing representational type of furnace, and its main feature advantage is as follows:
Significant prolongation material and the coal dust time of staying in shower furnace and whole dore furnace, help the completing combustion of fuel;
Coal dust is lighted in pure air, and its burn rate helps the quick after-flame of coal dust than obviously accelerating when burning in the low-oxygen environment of line style stove;
The existence of fluid bed has good adaptability to the middle or small material that collapses in producing, the obstruction that can avoid the blanking fluctuation to cause, the hardship of need discharge processing;
It is simple that coal dust sprays into mode, and fineness of pulverized coal is not had specific (special) requirements, generally do not need special coal burner;
Put outside tower that shower furnace can be arranged in preheater adds on the side of band fluid bed, alleviates the pylon load, is specially adapted to modernize and expand the existing factory;
Adopt Flow Field Distribution rationally, turbulent flow and the stronger two stoves that spurt of the eddy current stove of deciding, can bring into play the overall efficiency of stove group, the coal dust burn-off rate of the need that reach and raw material resolution ratio preferably.
Dore furnace of the present invention has been widened cement industry coal scope, has solved the difficult problem that low-volatile coal is used on suspension preheating predecomposition technology.Production practices show, adopt the low volatile coal calcination clinker, and for the production scale cement plant that is 1000t/d, only coal takes 1 year escapable cost~3,000,000 yuan.As seen adopt dore furnace calcining low-volatile coal of the present invention, have good social benefit and economic benefit.
Fig. 1 is a kind of dore furnace schematic diagram that is applicable to low volatile coal calcination
A kind of dore furnace that is applicable to low volatile coal calcination promptly with by put the combined type dore furnace of fluid bed shower furnace structure (seeing accompanying drawing 1), be connected into a stove by the shower furnace 2 of band fluid bed with two main stove 1 front and back of spurting and form.
The top of the shower furnace of band fluid bed feeds two main stove lower ends of spurting by increase in pipeline 3.
The top of the shower furnace of band fluid bed is fed the side lower end of two main stoves that spurt by the increase in pipeline that has the reverse U shape pipeline.
The cylinder of shower furnace part is reducing shape 9 also.It mainly constitutes by being connected into a stove group behind the shower furnace of being with fluid bed and the two main stokeholds of spurting.Tertiary air from the heat of kiln hood enters shower furnace through tertiary-air pipe 5; Coal dust 6 directly sprays in the fluid bed shower furnace, stable ignition and conflagration in from the pure air of fluid bed shower furnace bottom 7; Pre-thermal material from upper level whirlwind tube feeds shower furnace and two main stove that spurts respectively by elephant trunk 10 and 4; Unburnt coal dust and material enter and continue in the main stove to decompose while burn through connecting increase in pipeline in the shower furnace, come out of the stove at last, enter final stage whirlwind tube and carry out after the gas solid separation preheating and feed in the rotary kiln near the full material that decomposes; Revolution kiln tail gas 8 directly sprays into two main furnace bottoms and mix with the hot gas of shower furnace and to come out of the stove of spurting through two main stove reducings 11 of spurting.The cylinder of shower furnace part also can be made reducing shape 9 according to actual needs with the enhancing effect (shown in the double dot dash line in the accompanying drawing) of spurting.
Key of the present invention is to have adopted to low-volatile coal (Vad<15%) or low-grade fuel is adaptable, can stable ignition, the stove group that combines of the main stoves that pair spurt of the shower furnace of the offline model band fluid bed of conflagration and efficient strong turbulence, many eddy current, can adapt to low activity fuel after-flame and material resolution ratio and reach 90% or above need, fastidious meticulously on air inlet, feeding, hello coal position and planform and running parameter, with the stable ignition of assurance coal dust and the overall efficiency and the safe operation of conflagration and stove group.Certainly, in addition, still needing cooperates measures such as improving fineness of pulverized coal, raising tertiary air temperature to guarantee the stable ignition and the after-flame of low activity coal dust.
The contrast of table 1 dore furnace of the present invention and all kinds dore furnace
The dore furnace pattern The basic index parameter Essential characteristic Pluses and minuses
Dore furnace of the present invention 1. main stove sectional wind velocity: 7~10m/s suspension stove sectional wind velocity: 4~7m/s, 2. residence time of material, 10~21s, 3. operating temperatures: main stove: 870~920 ℃ of precombustion chambers: 830~870 ℃ of 4. material resolution ratio 85~95% Tertiary air is with bilateral or the one-sided fluid bed shower furnace that enters; Fuel burns in pure air; Rely on two spurting that material is distributed in the whole burner hearth in the main stove, formation is spurted and is distinguished and annulus, strengthens the carrying out of gas-solid mixed heat transfer and reaction. 1. material, uniformity of temperature profile.2. main furnace structure is simple, easy and simple to handle.3. pre-burner is that off-line layout 4. pre-burners can be adopted the adjustment volume size as required, big 5. fuel of design flexibility are lighted in pure air, help fuel fire burns
Type spurts
1. 870~920 ℃ of 4. material resolution ratio 85~92% of stove sectional wind velocity 5.5~9.5m/s 2. residence time of material 8~17s 3. operating temperatures Main dependence is spurted material is distributed in the whole burner hearth, forms spurt district and annulus.Off-line type: fuel burns in pure air.Online: fuel burns in the gaseous mixture of kiln gas and tertiary air. 1. it is even that material distributes, Temperature Distribution does not have dore furnace of the present invention.2. but off-line or online layout.3. part type of furnace NO XConcentration is lower.4. freely do not cause the material that collapses to stop up to off-line type dore furnace Chang Yinqiang material pulse or tertiary air.
Pipeline type 1. 3. 880~920 ℃ of 4. material resolution ratio 85~90% of operating temperature of stove sectional wind velocity 8~18m/s 2. residence time of material 8~20s (being 30s when special structure is adopted at the top) This type of furnace is a pipeline stream, and in order to prolong the time of staying of material in pipeline, pipeline need be done very longly. 1. temperature distribution uniform.2. the material distributing homogeneity is between fluidized bed furnace and other several type of furnaces.3. online or local off-line is arranged.4. be difficult for skinning.5. when burning low-volatile coal, pipeline is longer
The fluidization type 1. expect resolution ratio 60~75% in 820~865 ℃ of 4. stove of stove sectional wind velocity dilute phase district 3.5~5.5m/s concentrated phase area 7.5~12m/s 2. residence time of material 45~140s, 3. operating temperatures Material carries out fluidization with fluidized wind, and tertiary air enters with approximate head-on collision, has dilute-phase zone and concentrated phase area in the stove; This stove is realized reaching 90~95% into " secondary puts in place " of kiln material resolution ratio with vertical gas pass. 1. material is evenly distributed.2. in the uniformity of temperature profile, stove the temperature difference be everlasting ± 10 ℃ in, can not cause skinning because of hot-spot.3. the stove operation is more stable.4. help the burning of inferior fuel.5. off-line is arranged usually, no high-temperature region, and low-temperature operation, but be unfavorable for fine breeze stop in bed
Combined 1. the stove section variation is bigger, and wind speed changes 860~910 ℃ of 4. material resolution ratio 85~92% of 5~20m/s, 2. residence time of material, 7~18s, 3. operating temperatures greatly General SB, SC and three chambers of MC divided, at SB, SC chamber fuel precombustion in pure air, go out to enter the MC chamber behind the SC chamber and further burn, mix and decompose. 1. two room temperatures distribute difference slightly.It is suitable with the stove that spurts that 2.MC the chamber material distributes, SC chamber material skewness, and no dore furnace of the present invention is even.3. local off-line is arranged, is " off-line pre-burning " " online decomposition ".4. sometimes because of the hot-spot skinning.5. belong to part high-temperature operation dore furnace.

Claims (4)

1, a kind of dore furnace that is applicable to low volatile coal calcination is characterized in that: constitute by being connected into a stove group behind the shower furnace of being with fluid bed and the two main stokeholds of spurting.
2, a kind of dore furnace that is applicable to low volatile coal calcination according to claim 1 is characterized in that: the top of the shower furnace of band fluid bed feeds two main stove lower ends of spurting by increase in pipeline.
3, a kind of dore furnace that is applicable to low volatile coal calcination according to claim 1 and 2 is characterized in that: the top of the shower furnace of band fluid bed is fed the side lower end of two main stoves that spurt by the increase in pipeline that has the reverse U shape pipeline.
4, a kind of dore furnace that is applicable to low volatile coal calcination according to claim 1 and 2 is characterized in that: the cylinder of shower furnace part is reducing shape also.
CN 99205793 1999-03-04 1999-03-04 Decomposition furnace adapted to low volatile matter coal calcination Expired - Fee Related CN2365620Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 99205793 CN2365620Y (en) 1999-03-04 1999-03-04 Decomposition furnace adapted to low volatile matter coal calcination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 99205793 CN2365620Y (en) 1999-03-04 1999-03-04 Decomposition furnace adapted to low volatile matter coal calcination

Publications (1)

Publication Number Publication Date
CN2365620Y true CN2365620Y (en) 2000-02-23

Family

ID=34000268

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 99205793 Expired - Fee Related CN2365620Y (en) 1999-03-04 1999-03-04 Decomposition furnace adapted to low volatile matter coal calcination

Country Status (1)

Country Link
CN (1) CN2365620Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101654736B (en) * 2008-08-19 2011-04-06 沈阳铝镁设计研究院 Suspension stay sintering process and system
CN102636026A (en) * 2012-03-27 2012-08-15 安徽海螺川崎装备制造有限公司 Environment-friendly type C-KSV decomposition furnace
CN106090982A (en) * 2016-08-12 2016-11-09 天伟水泥有限公司 A kind of Calcium Carbide Ash, gangue second-time burning heat reclaiming system
CN113528168A (en) * 2021-09-05 2021-10-22 润鑫(杭州)新材料科技有限公司 Spouted furnace system for dry distillation of oil shale or shale semicoke and dry distillation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101654736B (en) * 2008-08-19 2011-04-06 沈阳铝镁设计研究院 Suspension stay sintering process and system
CN102636026A (en) * 2012-03-27 2012-08-15 安徽海螺川崎装备制造有限公司 Environment-friendly type C-KSV decomposition furnace
CN106090982A (en) * 2016-08-12 2016-11-09 天伟水泥有限公司 A kind of Calcium Carbide Ash, gangue second-time burning heat reclaiming system
CN113528168A (en) * 2021-09-05 2021-10-22 润鑫(杭州)新材料科技有限公司 Spouted furnace system for dry distillation of oil shale or shale semicoke and dry distillation method thereof

Similar Documents

Publication Publication Date Title
CN106986561B (en) Annular lime shaft kiln
CN207455621U (en) A kind of lower heat of combustion coal gas obtains the high effective flue gas furnace apparatus of high wind-warm syndrome
CN102777894A (en) Reverse powder injection combustor
CN101863627A (en) Double-beam lime kiln
CN109135350B (en) 5 ten thousand tons/year natural gas hard carbon black reacting furnace
CN111780106B (en) Flameless burner of steel rolling heating furnace and application thereof
CN204943511U (en) A kind of gas flare
CN2365621Y (en) Combined decomposition furnace with bottom swirl pre-combustion chamber
CN2365620Y (en) Decomposition furnace adapted to low volatile matter coal calcination
CN207998558U (en) A kind of extra light calcined magnesia suspended state calcination system
CN104048502B (en) A kind of burning-aid method of cement rotary kiln burner oxygen-enriching device
CN116143425B (en) Central burner type lime kiln
CN206751666U (en) Annular lime shaft kiln
CN218879751U (en) Central burner type lime kiln
CN2365622Y (en) Combined decomposition furnace with side swirl precombustion chamber
CN1117261C (en) Decomposing furnace adaptable to low volatile coal calcination
CN204987008U (en) Bispin STREAMING low heat value gas combustion ware
CN107504480A (en) A kind of industrial coal powder boiler with center feeding rotational flow coal dust burner
CN204786354U (en) Combustion system of wall opposed firing boiler security and economic nature around improving
CN207527582U (en) The low nitrogen rotational flow gas-fired combustor of flue gas recirculation built in gas-air Accurate Classification
CN2573977Y (en) Decomposing furnace with double vortex preburning chamber
CN105258113A (en) Low-heating-value liquid and solid fluidized bed boiler and combustion technology
CN201462815U (en) High-efficiency energy-conservation vertical moveable pulverized coal burner
CN101367536A (en) Method and decomposition stove for preparing lime in suspended state with wood coal as fuel
WO2021043241A1 (en) Pulverized coal boiler with bottom combustor, and control method therefor

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee