CN106833708A - The method that specific kiln coal blending coal is instructed in cement industry - Google Patents
The method that specific kiln coal blending coal is instructed in cement industry Download PDFInfo
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- CN106833708A CN106833708A CN201710186326.1A CN201710186326A CN106833708A CN 106833708 A CN106833708 A CN 106833708A CN 201710186326 A CN201710186326 A CN 201710186326A CN 106833708 A CN106833708 A CN 106833708A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
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- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
A kind of method the invention discloses specific kiln coal blending coal is instructed in cement industry, the method is comprised the following steps：Multiple batches of use coal is prepared, two characteristic parameter active combustion times and the heat release earthquake intensity of each batch coal are detected outside stove；After each batch coal enters stove burning production, mark coal consumption of each batch coal facies for unit clinker is calculated；The mark coal consumption of each batch coal and two characteristic parameters are analyzed using DAP, set up for the different marks coal consumption in special cement production line and specific kiln with coal and two relations of characteristic parameters, may finally stove it is outer by two adjustment of characteristic parameter to being made a choice and being controlled with the mark coal consumption of coal.The present invention proposes burning earthquake intensity, active combustion time as the characteristic parameter for evaluating coal burning characteristic, the clearly applicable coal property indication range of all kinds of cement industry kilns can be found by determining the parameter, for coal collocation is required using control is provided in production.
Description
Technical field
The invention belongs to cement industry field, and in particular to the method that specific kiln coal blending coal is instructed in cement industry.
Background technology
In novel concrete production process, the coal dust firing heat release in dore furnace, carbonate endothermic decomposition, the burning of coal dust
Situation affects the calorific capacity of dore furnace and the clinker of cement kiln.
Current energy growing tension, coal resources are increasingly rare, high-grade coal approach exhaustion, and low grade coal is answered
In cement industry also further extensively, coal frequently change and Coal rank collocation, bring many to production operation and ask
Topic, Coating clogging such as in dore furnace, coal consumption are high, clinker is low.
The solution of these problems depends on understanding and evaluation to coal burning characteristic first, it would be highly desirable to set up a kind of evaluation side
Method, its suitable coal is found using the evaluation method for different cement producing lines.
Burning of coal behavior is more complicated in cement industry, and traditional Industrial Analysis can not be applicable.There are many height the country
School and scientific research institution are studied coal burning characteristic, and its various evaluation index and appraisement system can not be described intuitively
The quality of coal burning, and targetedly applicable coal can not be provided for the difference of cement producing line.
Coal accounts for manufacture of cement cost 50~60%, and selection is applied to certain coal of cement producing line, can be cement work
Industry is applicable Coal rank and provides theoretical direction, improves coal utilizaton rate, reduces production cost, reduces CO2Discharge, steady production
Line, improve product quality.
The maximum user of coal is thermoelectricity, thus coal burning characteristic index (combustibility, ignition temperature, the decentralization that burns,
Tail-off time, integrated combustion property index) launch substantially about demands such as boiler fluid beds, and it is not suitable with the need of cement industry kiln
Ask；Clear and definite coal property index is never had as foundation in the buying of coal and each cement production enterprise of use.
Each cement industry research institution proposes comprehensive combustion characteristics index S value, and physical significance is indefinite, with cement
Actual coal burning behavior in industry kiln is not associated；Do not meet enterprise and type of coal and characteristic are applicable to cement industry kiln
The demand being defined, more leisure stoichiometric coal property index instruct the buying and coal application of coal.
The content of the invention
Coal burning characteristic correctly cannot be intuitively described to solve existing coal evaluation method, and cannot be cement work
Industry production is applicable the predicament that Coal rank provides theoretical direction, and the purpose of the present invention is using two combustion characteristic parameters of coal：
Active combustion time, heat release earthquake intensity (also referred to as burning earthquake intensity in this patent), set up a kind of specific kiln coal blending coal of guidance
Method, for industrial coal of cement provides theoretical direction.
The purpose of the present invention is achieved through the following technical solutions：
The method that specific kiln coal blending coal is instructed in cement industry, comprises the following steps：
(1) for specific cement producing line and specific kiln, prepare and multiple batches of use coal；
(2) outside stove, two characteristic parameters of each batch coal, i.e. active combustion time (T are detecteds) and heat release earthquake intensity
(I)；
(3) after each batch coal enters stove burning production, mark coal consumption of each batch coal facies for unit clinker is calculated；
(4) the mark coal consumption of each batch coal and two characteristic parameters are analyzed using DAP, set up pin
To the different marks coal consumption in special cement production line and specific kiln with coal and two relations of characteristic parameter, may finally be in stove
It is outer by two adjustment of characteristic parameter to being made a choice and being controlled with the mark coal consumption of coal.
It is more than multiple batches of preferably 20 batches described in step (1).
Cement producing line is a series of cement equipment production line of equipment composition for producing cement.It is main by crush and it is pre-
Change, the process such as raw material prepare homogenizing, pre- thermal decomposition, the burning till of clinker, cement grinding packaging is constituted.The inventive method application
In new dry process kiln system, specification is (5000t/d), including facility：Three gear rotary kiln specifications are essentially Φ 4.8x72m~Φ
4.8x74m, dore furnace specification is 7.5 × 30m to Φ of Φ, 7.6 × 32m (including gooseneck heat size about 2100m3Left and right), it is single-row
Or biserial preheater.
In step (2), described active combustion time (Ts) timing that refers to coal dust since steady combustion temperature is to combustible component
Time when weightless 98%, Ts=Tend-Tonset.；Tend：Timing to sample relative weight loss reaches 98% since sample is heated
Time record corresponding to (the 98% of the weight that i.e. sample can lose)；TonsetIt is surely to fire temperature, refers to that coal dust starts stabilization combustion
The temperature of burning, i.e., start to calculate example weight to observe the continuous weightlessness of sample, is lost to sample weight loss 10% and close to maximum
Temperature during weight speed represents steady combustion temperature, can be obtained by the measurement of fire box temperature.
Described heat release earthquake intensity (I) refers to the intensity of moment heat release in coal dust exothermic process, by sample in standard reality
Exothermic maximum value is calculated with the 1/2 of obvious Exotherm Time under the conditions of testing；I=H/W0.5；H：The highest of the differential thermal curve of Instrument measuring
Value, DSC peak heights (mW/mg)；W0.5：The beginning and ending time of 1/2 position of differential thermal curve exothermic peak, DSC half-peak breadths (min).
In step (2), two characteristic parameters of each batch coal of detection are comprised the following steps：
Coal dust is taken, fineness is ground to less than 125um, 45 DEG C of drying more than 4h, by moisture control between 1~2.5%；Claim
The sample of 10~15mg is taken, is detected using resistance to synchronous solving of speeding, the fire-retardant gas of reaction atmosphere is the air of 30ml/min, purging
Gas is the nitrogen of 10ml/min, using the heating rate of 10K/min, 1000 DEG C is risen to by room temperature；According to resistance to simultaneous thermal analysis of speeding
Instrument testing procedure carries out thermogravimetric detection, and carries out data analysis and calculating using resistance to Synchronization Analysis software of speeding, and obtains described two
Individual characteristic parameter；
DAP preferred Python or Minitab described in step (4).
The production process of modern cement kiln is：Coal dust sprays into what is horizontally rotated in hot blast from front end (being commonly called as kiln hood) with lower
Cylinder (being commonly called as cement kiln), the after-combustion of uniform temperature region is reached as water column, form flame long.The cement for preparing is ripe
Material raw material (powdered) feeds from rear end (being commonly called as kiln tail), coordinates cylinder constantly to rotate gradually forward；It is close with flame surface
But (not contacting, ensure the burning of coal dust), obtains enough heat and sufficient time to complete combination reaction, finally from kiln
Cooler is fallen at head be cooled into clinker.
The present invention selection active combustion time as evaluate coal burning characterisitic parameter the reason for be：From the life that kiln tail enters
Producing raw material needs to complete two step reactions, one be generated between 1000 DEG C to 1300 DEG C of temperature dicalcium silicate and other in the middle of
Body, another section of reaction for being to be completed between 1350 DEG C to 1500 DEG C of temperature tricalcium silicate.Coal dust active combustion could be to raw material
Heat needed for transmitting chemical reaction.The active combustion time is too short, be unfavorable for chemical reaction completion, quality be affected into
And the stabilization for operating is influenceed, and it is long, the tail end of cylinder is partly burned to, not only waste the energy but also cause equipment fault.
The reason for selective combustion earthquake intensity is：Emission capacity has very big difference after the coal dust firing of separate sources, and suitable puts
Heat energy power can ensure that the flame that coal dust firing is formed quickly reaches suitable temperature, because chemical reaction rate and temperature positive
Close, the ability suitably can then ensure even to accelerate the formation of tricalcium silicate, have positive face to increase yield and reducing energy consumption
Ring；Relatively low heating strength can cause peak flame temperature section to be difficult to reach the temperature that optimum completes raw material chemical reaction, but
It is that the excessive too high energy that not only wastes of flame temperature that causes of emission capacity is also possible to damage production facility.
The present invention has the following advantages and effect relative to prior art：
The present invention proposes burning earthquake intensity, active combustion time as the characteristic parameter for evaluating coal burning characteristic；One
It is to explain too high, kiln tail smoke-box temperature long for black duration and degree of heating in cement industry kiln, thickness kliner coating long, uncombusted coal ash well
Fall into product and cause the effect of coal burning factor in the abnormal conditions such as reducing atmosphere；The second is finding the identical coal place of production
Combustion characteristic values it is substantially close, for buying coal provide clear and definite indication index；Thirdly can be by determining the parameter
It was found that the applicable coal property indication range of clear and definite all kinds of cement industry kilns, for coal collocation use provides control in production
System is required.
Brief description of the drawings
Fig. 1 is the graphs of a relation for marking coal consumption and two characteristic parameters of each batch coal in specific kiln.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited
In this.
Embodiment
The method that specific kiln coal blending coal is instructed in cement industry, comprises the following steps：
(1) China Resources cement (upper to think) company is located at Guangxi Zhuang Autonomous Region Fangchenggang City Shangsi County Si Yang towns, possesses two
Produce the clinker production line of (5000t/d) daily, for the production line and its kiln of the said firm, prepare and multiple batches of use coal；
(2) outside stove, two characteristic parameters of each batch coal, active combustion time (T are detecteds), and heat release earthquake intensity
(I)；The results are shown in Table 1；
(3) after each batch coal enters stove burning production, mark coal consumption of each batch coal facies for unit clinker is calculated；
The results are shown in Table 1；
Its mark coal consumption is calculated by taking the 1st batch coal in table 1 as an example：
Mark coal consumption (kg coals/t clinkers)=enter per batch kiln coal total amount (ton) × (this batch of calorific value of coal (Kcal/kg)/
The 7000Kcal)/batch of coal produces clinker total amount (ton) × 1000
=5014 (t coals) × (t clinkers) × 1000 of (5692 (Kcal/kg)/7000)/38439
=106.06kg coals/t clinkers
(4) the mark coal consumption of each batch coal and two characteristic parameters are analyzed using DAP Mintab,
Set up for the different marks coal consumption in special cement production line and specific kiln with coal and two relations of characteristic parameter, such as Fig. 1
It is shown.
It can be seen that：
A, optimal mark coal consumption ＜ 103, heat release earthquake intensity substantially 1.20~1.32, the active combustion time substantially 16.0~
18.1。
B, suboptimum mark coal consumption 103~105, the active combustion time is substantially below 18.5.
C, higher coal consumption 105~107, the active combustion time is substantially more than 18.6.
D, coal consumption higher 107~110, heat release earthquake intensity substantially 0.87~1.12, the active combustion time substantially 19.8~
22.0。
By above-mentioned relation, can be in the outer mark by the use coal to two adjustment of characteristic parameter to specific kiln of stove
Coal consumption makes a choice and controls.
Table 1
Above-described embodiment is the present invention preferably implementation method, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (5)
1. the method that specific kiln coal blending coal is instructed in cement industry, it is characterised in that comprise the following steps：
(1) for specific cement producing line and specific kiln, prepare and multiple batches of use coal；
(2) outside stove, two characteristic parameters of each batch coal, i.e. active combustion time and heat release earthquake intensity are detected；
(3) after each batch coal enters stove burning production, mark coal consumption of each batch coal facies for unit clinker is calculated；
(4) the mark coal consumption of each batch coal and two characteristic parameters are analyzed using DAP, are set up for spy
Determine to mark coal consumption and two relations of characteristic parameter with the different of coal in cement producing line and specific kiln, may finally lead to outside stove
Cross to two adjustment of characteristic parameter to being made a choice and being controlled with the mark coal consumption of coal.
2. method according to claim 1, it is characterised in that：Cement producing line described in step (1) is new type dry kiln
System.
3. method according to claim 1, it is characterised in that：Multiple batches of described in step (1) is more than 20 batches.
4. method according to claim 1, it is characterised in that：In step (2), two spies of each batch coal of detection
Parameter is levied, is comprised the following steps：
Coal dust is taken, fineness is ground to less than 125um, 45 DEG C of drying more than 4h, by moisture control between 1~2.5%；Weigh 10
The sample of~15mg, detects that the fire-retardant gas of reaction atmosphere is the air of 30ml/min using resistance to synchronous solving of speeding, and purge gass are
The nitrogen of 10ml/min, using the heating rate of 10K/min, 1000 DEG C is risen to by room temperature；Surveyed according to resistance to synchronous solving of speeding
Try carries out thermogravimetric detection suddenly, and carries out data analysis and calculating using resistance to Synchronization Analysis software of speeding, and obtains two described spies
Levy parameter.
5. method according to claim 1, it is characterised in that：DAP described in step (4) be Python or
Minitab。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710186326.1A CN106833708B (en) | 2017-03-27 | 2017-03-27 | Method for guiding coal blending of specific kiln in cement industry |
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| CN201710186326.1A CN106833708B (en) | 2017-03-27 | 2017-03-27 | Method for guiding coal blending of specific kiln in cement industry |
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| CN106833708A true CN106833708A (en) | 2017-06-13 |
| CN106833708B CN106833708B (en) | 2020-08-11 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214199A (en) * | 2012-12-15 | 2013-07-24 | 昆明钢铁控股有限公司 | Method for calcining novel dry-method cement clinker by brown coal |
| CN106007425A (en) * | 2016-05-23 | 2016-10-12 | 临沂中联水泥有限公司 | Method for producing cement clinker by adopting matching of high and low volatile bituminous coal |
-
2017
- 2017-03-27 CN CN201710186326.1A patent/CN106833708B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214199A (en) * | 2012-12-15 | 2013-07-24 | 昆明钢铁控股有限公司 | Method for calcining novel dry-method cement clinker by brown coal |
| CN106007425A (en) * | 2016-05-23 | 2016-10-12 | 临沂中联水泥有限公司 | Method for producing cement clinker by adopting matching of high and low volatile bituminous coal |
Non-Patent Citations (1)
| Title |
|---|
| 刘瑞芝等: ""水泥工业中煤的燃烧特性评价方法"", 《水泥技术》 * |
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