CN104726697B - 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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- CN104726697B CN104726697B CN201410712204.8A CN201410712204A CN104726697B CN 104726697 B CN104726697 B CN 104726697B CN 201410712204 A CN201410712204 A CN 201410712204A CN 104726697 B CN104726697 B CN 104726697B
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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 in a kind of on-line monitoring drying grate green-ball moisture content method, especially a kind of for pelletizing production neck
The method of green-ball moisture content in on-line monitoring drying grate in domain.
Background technology
Chain-return-ring pellet production line is domestic at present pellet production line the most universal.Chain-return-ring pellet production line heat
Work route is：Green-ball drying-preheating-oxidizing roasting-cooling-balling-up pellet.The drying being substantially carried out green-ball in drying grate is pre-
Thermal process.Green-ball drying effect directly influences the preheating and baking of green-ball, if drying effect is poor, green-ball moisture content can not take off in time
Remove, it will in preheating afterwards, calcining process explosion, produce broken ball and powder in a large number, affect whole thermal regulation.Bring heat waste
The problems such as thermal source consumption increase, the production costs such as increase, fan rotor abrasion aggravation, coal gas rise.Drying grate monitoring is at present only
It is that the air quantity pathogenic wind-warm to key point is monitored.Lack the monitoring of green-ball moisture content, thus cannot grasp green-ball in real time and be dried
During moisture content removing situation it is impossible to adjust technological parameter in time, improve green-ball drying effect, reduce thermal technology's implosive, dust
Content, optimizes thermal regulation.The drying of green-ball is carried out in the blasting drying period of drying grate and down-draft drying zone, and hereinafter referred to as drum is dry
Section, drain section, the dry section of drum, drain section and be sealing container, all have an air inlet and an air outlet.Air inlet brings
150 300 DEG C of gas, green-ball moisture content is taken away by air outlet by high-temperature gas, reaches the effect of removing moisture content.Prior art
In also there is no a kind of method that can accurately and timely monitor green-ball moisture content.
Content of the invention
The technical problem to be solved is to provide one kind can accurately and timely green-ball in on-line monitoring drying grate
The method of moisture content.
Method for solving green-ball moisture content in the on-line monitoring drying grate that the above-mentioned technical problem present invention adopts, including following
Several steps：
At the beginning of a, the hour intake measuring drying grate, drying grate machine speed, material thickness, material width, material heap density, green-ball
Beginning moisture content, hour air output, the absolute humidity of real-time detection drying grate air outlet and the absolute humidity of air inlet；
B, the data obtaining measurement in a step and real-time detection are transferred to computer；
C, utilize computer, according to formula " green-ball initial moisture content total amount=drying grate machine speed × material thickness × material width ×
The material heap density × initial moisture content of green-ball " calculates green-ball initial moisture content total amount；Using computer, according to formula " air inlet
Moisture content total amount=hour intake × air inlet absolute humidity " calculates air inlet moisture content total amount；Using computer, according to public affairs
Formula " air outlet moisture content total amount=hour air output × air outlet absolute humidity " draws air outlet moisture content total amount；
D, utilize computer, green-ball initial moisture content total amount, air inlet moisture content total amount and air outlet are calculated according to back
Moisture content total amount, and according to formula " green-ball final moisture content total amount=green-ball initial moisture content total amount+air inlet moisture content total amount-air outlet
Moisture content total amount ", " × material heap surmised by the final moisture content=green-ball of green-ball final moisture content total amount ÷ drying grate machine speed × material thickness × material
Density " calculates the final moisture content of green-ball.
It is further to detect the absolute humidity values of drying grate air outlet using hygronom, hygronom is arranged on chain
Comb machine drum is done section air inlet and air outlet or is drained section air inlet and air outlet.
The invention has the beneficial effects as follows：The absolute humidity of real-time detection drying grate air outlet and air inlet definitely wet
Degree, is calculating rapidly green-ball final moisture content total amount using computer, so can grasp green-ball water in dry run in real time
Part removing situation, thus adjusting technological parameter in time, improving green-ball drying effect, reducing thermal technology's implosive, dust content, optimize
Thermal regulation.
Specific embodiment
The method of green-ball moisture content in the on-line monitoring drying grate of the present invention, including following step：
At the beginning of a, the hour intake measuring drying grate, drying grate machine speed, material thickness, material width, material heap density, green-ball
Beginning moisture content, hour air output, the absolute humidity of real-time detection drying grate air outlet and the absolute humidity of air inlet；
B, the data obtaining measurement in a step and real-time detection are transferred to computer；
C, utilize computer, according to formula " green-ball initial moisture content total amount=drying grate machine speed × material thickness × material width ×
The material heap density × initial moisture content of green-ball " calculates green-ball initial moisture content total amount；Using computer, according to formula " air inlet
Moisture content total amount=hour intake × air inlet absolute humidity " calculates air inlet moisture content total amount；Using computer, according to public affairs
Formula " air outlet moisture content total amount=hour air output × air outlet absolute humidity " draws air outlet moisture content total amount；
D, utilize computer, green-ball initial moisture content total amount, air inlet moisture content total amount and air outlet are calculated according to back
Moisture content total amount, and according to formula " green-ball final moisture content total amount=green-ball initial moisture content total amount+air inlet moisture content total amount-air outlet
Moisture content total amount ", " × material heap surmised by the final moisture content=green-ball of green-ball final moisture content total amount ÷ drying grate machine speed × material thickness × material
Density " calculates the final moisture content of green-ball.The absolute humidity of real-time detection drying grate air outlet and the absolute humidity of air inlet,
Calculate rapidly the final moisture content of green-ball using computer, so can grasp green-ball moisture content removing feelings in dry run in real time
Condition, thus adjusting technological parameter in time, improving green-ball drying effect, reducing thermal technology's implosive, dust content, optimize thermal technology's system
Degree.
Detect the absolute humidity values of drying grate air outlet using hygronom, hygronom is arranged on the dry section of drying grate drum and enters
At air port and air outlet or drain section air inlet and air outlet.
Embodiment：Related data, hour intake 2 × 105m3/ h, hour air output 2 × 105m3/ h, air inlet are definitely wet
Degree 0mg/L, air outlet absolute humidity 92mg/L, the initial moisture content of green-ball 9%, drying grate machine speed 2m/min, width 4m, material are thick
200mm, heap density 2.2t/m3.
The final moisture content of green-ball=(hour intake × air inlet absolute humidity+drying grate machine speed × material thickness × width × heap
The initial moisture content of density × green-ball-hour air output × air outlet absolute humidity) ÷ (drying grate machine speed × material thickness × width × heap
Density)
=(2 × 105m3/h×0mg/L+2m/min×200mm×4m×2.2t/m3× 9%-2 × 105m3/h×60mg/
L)/(2m/min×200mm×4m×2.2t/m3)
=(0+120 × 0.2 × 4 × 2.2 × 9%-2 × 105×94×106)/(120×0.2×4×2.2)
=(19.008-18.4)/19.008
=3.19%
If the best practices data of the recent final moisture content of green-ball is 3%, green-ball Drying Technology Parameter is reasonable, drying effect
Preferably, should persistently keep.
If the best practices data of the recent final moisture content of green-ball is 1%, green-ball Drying Technology Parameter is unreasonable, and effect is dried
Really poor, answer timely adjusting parameter, improve drying effect.
Claims (2)
1. in on-line monitoring drying grate green-ball moisture content method it is characterised in that include following step：
A, the hour intake measuring drying grate, drying grate machine speed, material thickness, material width, material heap density, green-ball initial water
Part, hour air output, the absolute humidity of real-time detection drying grate air outlet and the absolute humidity of air inlet；
B, the data obtaining measurement in a step and real-time detection are transferred to computer；
C, utilize computer, according to formula " green-ball initial moisture content total amount=drying grate machine speed × material thickness × material width × material
Heap density × initial the moisture content of green-ball " calculates green-ball initial moisture content total amount；Using computer, according to formula " air inlet moisture content
Total amount=hour intake × air inlet absolute humidity " calculates air inlet moisture content total amount；Using computer, according to formula
" air outlet moisture content total amount=hour air output × air outlet absolute humidity " draws air outlet moisture content total amount；
D, utilize computer, green-ball initial moisture content total amount, air inlet moisture content total amount and air outlet moisture content are calculated according to back
Total amount, and according to formula " green-ball final moisture content total amount=green-ball initial moisture content total amount+air 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 × material thickness × material surmises × and material heap is close
Degree " calculates the final moisture content of green-ball；
When wherein little, intake unit is m3/ h, hour air output unit are m3/ h, air inlet absolute humidity unit are mg/L, go out
Air port absolute humidity unit is mg/L, drying grate machine speed unit is m/min, width unit is m, the thick unit of material is mm, heap density
Unit is t/m3.
2. in on-line monitoring drying grate as claimed in claim 1 green-ball moisture content method it is characterised in that：Using hygronom
The absolute humidity values of detection drying grate air outlet, hygronom is arranged on drying grate drum dry section air inlet and air outlet or takes out
Dry section air inlet and air outlet.
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 |
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| CN104726697A CN104726697A (en) | 2015-06-24 |
| CN104726697B true 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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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3968640B2 (en) * | 2002-04-02 | 2007-08-29 | 株式会社サタケ | Bean drying device |
| 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 |
| HU228102B1 (en) * | 2009-04-21 | 2012-10-29 | Peter Lipot Winkler | Apparatus and method for producting iron-ore briquette |
| 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 |
| AR086635A1 (en) * | 2012-05-16 | 2014-01-15 | Inst Nac De Tecnologia Agropecuaria | INSTALLATION FOR REGULATION OF MOISTURE IN GRAINS AND PROCEDURE FOR OBTAINING SUCH REGULATION |
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