CN104726697A - Method for monitoring moisture of green pellets in chain grate on line - Google Patents
Method for monitoring moisture of green pellets in chain grate on line Download PDFInfo
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- CN104726697A CN104726697A CN201410712204.8A CN201410712204A CN104726697A CN 104726697 A CN104726697 A CN 104726697A CN 201410712204 A CN201410712204 A CN 201410712204A CN 104726697 A CN104726697 A CN 104726697A
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- moisture content
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Abstract
The invention discloses a method for monitoring the moisture of green pellets in a chain grate on line and in particular provides a method for monitoring the moisture of green pellets in the chain grate on line, which is used in the field of pellet production. The invention provides the method capable of accurately and timely monitoring the moisture of green pellets in the chain grate on line. The method comprises the following steps: a. measuring the supply air rate per hour of the chain grate, the speed of the chain grate, the material thickness, the material width, the material bulk density, the initial moisture of the green pellets and the air discharge rate per hour, and detecting the absolute humidity at an air outlet and air inlet of the chain grate in real time; b. transmitting the data obtained through measurement and real-time detection in the step a to a computer; c. computing the final total moisture of the green pellets by utilizing the computer according to a formula. Therefore, the moisture removal conditions of the green pellets in the drying process can be mastered in real time, thus timely regulating the process parameters, improving the green pellet drying effects, reducing the thermal implosion and the dust content and optimizing the thermal regulation.
Description
Technical field
The present invention relates to the method for green-ball moisture content in a kind of on-line monitoring drying grate, especially a kind of method for green-ball moisture content in the on-line monitoring drying grate in pellet formation field.
Background technology
Chain-return-ring pellet production line is domestic pellet production line the most general at present.Chain-return-ring pellet production line thermal technology route is: green-ball drying-preheating-oxidizing roasting-cooling-balling-up pellet.The drying and preheating technique of green-ball is mainly carried out in drying grate.Green-ball drying effect directly has influence on the preheating and baking of green-ball, some dry weak effects, and green-ball moisture content can not remove in time, in preheating afterwards, calcining process explosion, will produce a large amount of broken ball and powder, affect whole thermal regulation.Bring the problems such as thermal source consumption increase, production cost rising such as heat waste increases, fan rotor wearing and tearing aggravation, coal gas.Drying grate monitoring is just monitored the air quantity wind-warm syndrome of key point at present.Lack the monitoring of green-ball moisture content, so just cannot grasp green-ball moisture content in drying process in real time and remove situation, cannot adjusting process parameter in time, improve green-ball drying effect, reduce thermal technology's implosive, dust content, optimize thermal regulation.The drying of green-ball is carried out at the blasting drying period of drying grate and down-draft drying zone, and hereinafter referred to as drum dry section, the section of draining, the dry section of drum, the section of draining are sealed vessel, all have a blast inlet and an air outlet.Blast inlet brings the gas of 150-300 DEG C, and green-ball moisture content is taken away by air outlet by high-temperature gas, reaches the effect removing moisture content.A kind of method accurately and timely can monitoring green-ball moisture content is not also had in prior art.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of can accurately and timely the method for green-ball moisture content in on-line monitoring drying grate.
For solving the problems of the technologies described above the method for green-ball moisture content in on-line monitoring drying grate that the present invention adopts, comprise following step:
A, hour air output measuring drying grate, drying grate machine speed, expect thick, material width, bing density, the initial moisture content of green-ball, hour air output, detect the absolute humidity at drying grate air outlet place and the absolute humidity of air inlet in real time;
B, will measure in a step and detect the data obtained in real time and be transferred to computer;
C, utilize computer, calculate the initial moisture content total amount of green-ball according to formula " green-ball initial moisture content total amount=drying grate machine speed × expect thick × material width × initial moisture content of bing density × green-ball "; Utilize computer, calculate blast inlet moisture content total amount according to formula " blast inlet moisture content total amount=hour air output × blast inlet absolute humidity "; Utilize computer, draw air outlet moisture content total amount according to formula " air outlet moisture content total amount=hour air output × air outlet absolute humidity ";
D, utilize computer, calculate the initial moisture content total amount of green-ball, blast inlet moisture content total amount and air outlet moisture content total amount according to back, and calculate the final moisture content of green-ball according to formula " green-ball final moisture content total amount=green-ball initial moisture content total amount+blast inlet moisture content total amount-air outlet moisture content total amount ", " the final moisture content=green-ball of green-ball final moisture content total amount ÷ drying grate machine speed × expect that × bing density surmised by thick × material ".
Further, utilize hygronom to detect the absolute humidity values at drying grate air outlet place, hygronom is arranged on the dry section air inlet of drying grate drum and air outlet place or the section of draining air inlet and air outlet place.
The invention has the beneficial effects as follows: detect the absolute humidity at drying grate air outlet place and the absolute humidity of air inlet in real time, the final moisture content total amount of green-ball is calculated rapidly utilizing computer, green-ball moisture content in drying process can be grasped so in real time and remove situation, thus timely adjusting process parameter, improve green-ball drying effect, reduce thermal technology's implosive, dust content, optimize thermal regulation.
Embodiment
The method of green-ball moisture content in on-line monitoring drying grate of the present invention, comprises following step:
A, hour air output measuring drying grate, drying grate machine speed, expect thick, material width, bing density, the initial moisture content of green-ball, hour air output, detect the absolute humidity at drying grate air outlet place and the absolute humidity of air inlet in real time;
B, will measure in a step and detect the data obtained in real time and be transferred to computer;
C, utilize computer, calculate the initial moisture content total amount of green-ball according to formula " green-ball initial moisture content total amount=drying grate machine speed × expect thick × material width × initial moisture content of bing density × green-ball "; Utilize computer, calculate blast inlet moisture content total amount according to formula " blast inlet moisture content total amount=hour air output × blast inlet absolute humidity "; Utilize computer, draw air outlet moisture content total amount according to formula " air outlet moisture content total amount=hour air output × air outlet absolute humidity ";
D, utilize computer, calculate the initial moisture content total amount of green-ball, blast inlet moisture content total amount and air outlet moisture content total amount according to back, and calculate the final moisture content of green-ball according to formula " green-ball final moisture content total amount=green-ball initial moisture content total amount+blast inlet moisture content total amount-air outlet moisture content total amount ", " the final moisture content=green-ball of green-ball final moisture content total amount ÷ drying grate machine speed × expect that × bing density surmised by thick × material ".The real-time absolute humidity at detection drying grate air outlet place and the absolute humidity of air inlet, the final moisture content of green-ball is calculated rapidly utilizing computer, green-ball moisture content in drying process can be grasped so in real time and remove situation, thus timely adjusting process parameter, improve green-ball drying effect, reduce thermal technology's implosive, dust content, optimize thermal regulation.
Utilize hygronom to detect the absolute humidity values at drying grate air outlet place, hygronom is arranged on the dry section air inlet of drying grate drum and air outlet place or the section of draining air inlet and air outlet place.
Embodiment: related data, hour air output 2 × 10
5m
3/ h, hour air output 2 × 10
5m
3/ h, blast inlet absolute humidity 0mg/L, air outlet absolute humidity 92mg/L, the initial moisture content of green-ball 9%, drying grate machine speed 2m/min, width 4m, expect thick 200mm, bulk density 2.2t/m
3.
The final moisture content of green-ball=(hour air output × blast inlet absolute humidity+drying grate machine speed × expect thick × width × initial moisture content of bulk density × green-ball-hour air output × air outlet absolute humidity) ÷ (drying grate machine speed × expect thick × width × bulk density)
＝(2×10
5m
3/h×0mg/L+2m/min×200mm×4m×2.2t/m
3×9％－2×10
5m
3/h×60mg/L)/ (2m/min×200mm×4m×2.2t/m
3)
＝(0+120×0.2×4×2.2×9％－2×10
5×94×10
﹣6)/(120×0.2×4×2.2)
＝(19.008－18.4)/19.008
＝3.19％
If the best practices data of the final moisture content of green-ball are 3% in the recent period, then green-ball Drying Technology Parameter is reasonable, and drying effect is better, should continue to keep.
If the best practices data of the final moisture content of green-ball are 1% in the recent period, then green-ball Drying Technology Parameter is unreasonable, and drying effect is poor, should adjust parameter in time, improve drying effect.
Claims (2)
1. the method for green-ball moisture content in on-line monitoring drying grate, is characterized in that, comprise following step:
A, hour air output measuring drying grate, drying grate machine speed, expect thick, material width, bing density, the initial moisture content of green-ball, hour air output, detect the absolute humidity at drying grate air outlet place and the absolute humidity of air inlet in real time;
B, will measure in a step and detect the data obtained in real time and be transferred to computer;
C, utilize computer, calculate the initial moisture content total amount of green-ball according to formula " green-ball initial moisture content total amount=drying grate machine speed × expect thick × material width × initial moisture content of bing density × green-ball "; Utilize computer, calculate blast inlet moisture content total amount according to formula " blast inlet moisture content total amount=hour air output × blast inlet absolute humidity "; Utilize computer, draw air outlet moisture content total amount according to formula " air outlet moisture content total amount=hour air output × air outlet absolute humidity ";
D, utilize computer, calculate the initial moisture content total amount of green-ball, blast inlet moisture content total amount and air outlet moisture content total amount according to back, and calculate the final moisture content of green-ball according to formula " green-ball final moisture content total amount=green-ball initial moisture content total amount+blast inlet moisture content total amount-air outlet moisture content total amount ", " the final moisture content=green-ball of green-ball final moisture content total amount ÷ drying grate machine speed × expect that × bing density surmised by thick × material ".
2. the method for green-ball moisture content in on-line monitoring drying grate as claimed in claim 1, it is characterized in that: utilize hygronom to detect the absolute humidity values at drying grate air outlet place, hygronom is arranged on the dry section air inlet of drying grate drum and air outlet place or the section of draining air inlet and air outlet place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712204.8A CN104726697B (en) | 2014-11-28 | 2014-11-28 | Method for monitoring moisture of green pellets in chain grate on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712204.8A CN104726697B (en) | 2014-11-28 | 2014-11-28 | Method for monitoring moisture of green pellets in chain grate on line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104726697A true CN104726697A (en) | 2015-06-24 |
| CN104726697B CN104726697B (en) | 2017-02-22 |
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|---|---|---|---|
| CN201410712204.8A Active CN104726697B (en) | 2014-11-28 | 2014-11-28 | Method for monitoring moisture of green pellets in chain grate on line |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003289796A (en) * | 2002-04-02 | 2003-10-14 | Satake Corp | Method for drying beans and apparatus therefor |
| CN101349632A (en) * | 2008-08-27 | 2009-01-21 | 中冶长天国际工程有限责任公司 | Method for testing sintered mixture ventilation property, sintering control method and sintering machine |
| WO2010122362A1 (en) * | 2009-04-21 | 2010-10-28 | Winkler Peter Lipot | Apparatus and method for producing drest iron-ore briquette and/or pellet from steel making converter flue-dust, sludge or red mud |
| CN101974680B (en) * | 2010-10-29 | 2012-05-23 | 中南大学 | Method for quickly testing appropriate granulation moisture content of iron ore sinter mixture |
| CN102305805B (en) * | 2011-07-29 | 2012-12-19 | 中南大学 | Method for detecting moisture distribution at material layer in chain grate machine in pelletizing production process |
| EP2803926A2 (en) * | 2012-05-16 | 2014-11-19 | Instituto Nacional De Tecnología Agropecuaria (INTA) | Procedure and facility for grain moisture control |
-
2014
- 2014-11-28 CN CN201410712204.8A patent/CN104726697B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003289796A (en) * | 2002-04-02 | 2003-10-14 | Satake Corp | Method for drying beans and apparatus therefor |
| CN101349632A (en) * | 2008-08-27 | 2009-01-21 | 中冶长天国际工程有限责任公司 | Method for testing sintered mixture ventilation property, sintering control method and sintering machine |
| WO2010122362A1 (en) * | 2009-04-21 | 2010-10-28 | Winkler Peter Lipot | Apparatus and method for producing drest iron-ore briquette and/or pellet from steel making converter flue-dust, sludge or red mud |
| CN101974680B (en) * | 2010-10-29 | 2012-05-23 | 中南大学 | Method for quickly testing appropriate granulation moisture content of iron ore sinter mixture |
| CN102305805B (en) * | 2011-07-29 | 2012-12-19 | 中南大学 | Method for detecting moisture distribution at material layer in chain grate machine in pelletizing production process |
| EP2803926A2 (en) * | 2012-05-16 | 2014-11-19 | Instituto Nacional De Tecnología Agropecuaria (INTA) | Procedure and facility for grain moisture control |
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| CN104726697B (en) | 2017-02-22 |
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