CN106383040B - A kind of desulfurization wet milk lime stone pulping system performance test methods - Google Patents
A kind of desulfurization wet milk lime stone pulping system performance test methods Download PDFInfo
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- CN106383040B CN106383040B CN201610958609.9A CN201610958609A CN106383040B CN 106383040 B CN106383040 B CN 106383040B CN 201610958609 A CN201610958609 A CN 201610958609A CN 106383040 B CN106383040 B CN 106383040B
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Abstract
The invention discloses a kind of desulfurization wet milk lime stone pulping system performance test methods, belong to equipment performance the field of test technology.The present invention calculates limestone slurry liquid swirler circulating ratio, wet milk maximum output, wet milk optimum charge of balls, wet milk unit power consumption by test lime stone particle sice in serosity.Performance test methods content provided by the invention is comprehensive, and scientific and precise is practical, will play specification, directive function to the debugging of wet milk pulping system, performance test, promotes the optimization operation of wet milk pulping system, achievees the purpose that energy-saving.
Description
Technical field
The invention belongs to equipment performance the field of test technology, in particular to a kind of desulfurization wet milk lime stone pulping system
It can test method.
Background technique
Limestone-gypsum Wet Flue Gas Desulfurization Process technology prepares lime stone slurry using wet milk and has been answered extensively in thermal power plant
With desulfurization wet milk lime stone pulping system is the important component of Limestone-gypsum Wet Flue Gas Desulfurization Process system.But at present I
State is still without a set of coal-fired flue gas desulfurization wet milk lime stone pulping system performance test methods, in the data of public publication
Not external same class standard.In " desulfurization Wet Limestone ball mill " (JB/T10731-2007) mark that machinery industry is formulated
Wet Limestone ball mill pattern, basic parameter, technical requirements, product quality test method and test gauge are only defined in standard
Then, the requirement of the manufacture views such as mark, packaging, transport, without claiming to its performance project and test method." wet
Method flue gas desulfurization device special equipment limestone/gypsum cyclone " it in (JB/T10984-2010) standard is tied to it
Structure, material and manufacture view claim, and also only propose cyclone operation pressure, annual utilization hours and service life to its performance
Aspect requirement.
Summary of the invention
In view of the deficiency of the prior art, the present invention provides a kind of desulfurization wet milk lime stone pulping systems
Energy test method, to fill up the blank of domestic desulfurization wet milk lime stone pulping system performance test methods.
The technical solution adopted by the present invention are as follows:
A kind of desulfurization wet milk lime stone pulping system performance test methods are calculated by test lime stone particle sice in serosity
Limestone slurry liquid swirler circulating ratio, specific performance test method are as follows: to limestone slurry liquid swirler underflow limestone slurry
Liquid, cyclone overflow lime stone slurry and cyclone inlet lime stone slurry are sampled respectively, and every 30min sampling is primary, often
Sub-sampling 500ml at least samples the cyclone underflow lime stone slurry for calculating and recording each sample time three times, cyclone overflows
Flow the fineness of lime stone slurry and cyclone inlet lime stone slurry；
The limestone slurry liquid swirler circulating ratio k of different sample times is calculated as follows, and results are averaged:
In formula:
Rbtf--- cyclone underflow lime stone slurry fineness, %；
Rovf--- cyclone overflow lime stone slurry fineness, %；
Rinf--- cyclone inlet lime stone slurry fineness, %；
Above-mentioned technical proposal further includes the test method of wet milk maximum output and optimum charge of balls: steel ball loading capacity
ForW 1 , driving motor running currentI 1 , day-to-day operation, which is contributed, isB w1 , specific testing procedure is as follows:
Step S1: the density of sampling analysis cyclone overflow lime stone slurryρ ovf It is thin with cyclone overflow lime stone slurry
DegreeR ovf ；
Step S2: whenρ ovf In 1.187kg/L-1.233kg/L range andR ovf ≤ 10%, then gradually increase wet-milling weighing
The lime stone feeding coal and steel ball loading capacity that belt claimsW 1 , while sampling analysis cyclone overflow lime stone slurryR ovf ；
Step S3: whenR ovf When >=10%, terminates lime stone feed and steel ball loads, obtain optimum charge of balls W max ,
The lime stone maximum feeding coal of wet milk belt of weighing display is referred to as wet milk maximum outputB W1, max , unit t/h, accordingly at this time
Wet milk driving motor running current isI w1,max , unit A；
Above-mentioned technical proposal further includes the test method of wet milk unit power consumption:
Step S4: before test, the steel ball loading capacity and wet milk power output of wet milk are recorded；
Step S5: wet milk driving motor electric energy meter reading, the two difference are wet-milling at the end of when record test starts
The electricity consumption of machine driving motor；
Step S6: lime stone weighing belt adds up lime stone gauge reading, the two difference at the end of when record test starts
For the lime stone amount ground；
Step S7: wet milk unit power consumption is calculated as follows:
In formula:
E--- wet milk unit power consumption, kWh/t；
ΔE--- wet milk driving motor electricity consumption, kWh during test；
ΔB--- the lime stone amount that wet milk is ground during test, t.
In above-mentioned technical proposal, in the test method of wet milk maximum output and optimum charge of balls, by 1/4W max ExtremelyW max Section be divided into 10 equal parts, gradually increase steel ball to wet milk, repeat S2 testing procedure, and record steel ball loading capacityW 1 If
Three conditions any one meets i.e. termination test below:
A, wet milk steel ball loading capacity has reached wet milk design maximum loading；
B, wet milk driving motor running current, which has reached it, allows maximum current；
C, carry out fineness occur when power output test after the increase of wet milk steel ball loading capacity for the first timeR ovf ≥10%。
In above-mentioned technical proposal, it is preferred that in the wet milk maximum output and the test method of optimum charge of balls,
The requirement of testing time are as follows:
A, in 2 months after desulphurization system test run of newly-built desulfurization wet milk lime stone pulping system performance test
It carries out；
B, in-service desulfurization wet milk pulping system performance test carries out in two weeks after steel ball screening operation.
In above-mentioned technical proposal, it is preferred that in the test method of the wet milk unit power consumption, testing time 4-6h.
In above-mentioned technical proposal, the requirement of test process stable state: desulfurization wet milk lime stone pulping system is in wet-milling
When machine confluent, lime stone feeding coal be constant and the lime stone slurry of cyclone overflow does not return to recycling tank, limestone slurry
Liquid recycling tank liquid level and serum density are stablized constant.
In above-mentioned technical proposal, the requirement of the wet milk steel ball loading capacity is as follows:
The newly-built wet milk steel ball loading capacity of I should be such that wet milk lime stone pulping system power output is close to or up to after debugging
The designed productive capacity of wet milk；
II is more than 3 months wet milks to runing time, is needed before being tested for the property the steel ball in grinding machine is whole
It takes out, re-starts screening, the steel ball that diameter is less than 30mm and breakage is discarded, again in the different-diameter steel ball ratio discarded
Increase, so that wet milk lime stone pulping system power output is close to or up to the production capacity of wet milk design.
In above-mentioned technical proposal, during test, the raw limestone granularity ground is less than 20mm or meets design requirement.
Above-mentioned technical proposal, during the test, the operating pressure of limestone slurry liquid swirler meet design requirement, each
Eddy flow meets " the wet flue gas desulfurizer special equipment limestone/gypsum eddy flow of JB/T 10984 without blocking, breakage
Device " other technologies requirement.
In above-mentioned technical proposal, during performance test, wet milk slurrying with water solid content less than 2%, wet milk entrance and
Lime stone slurry recycling tank confluent requires setting, dduring test, water supply referring to material balance table in wet milk specification
Amount is adjusted according to cyclone overflow lime stone slurry density.
The utility model has the advantages that desulfurization wet milk lime stone pulping system performance test methods provided by the invention, according to grinding machine system
The technology and operation characteristic of slurry system, the test item of proposition calculate cyclone circulation times by test lime stone particle sice in serosity
Rate, wet milk maximum output, wet milk optimum charge of balls, wet milk unit power consumption.Choosing to performance project test method
It takes and both considers its accuracy, it is also contemplated that practical, content is comprehensive, and scientific and precise is practical, and technology contents meet me
The requirement of state's current law, regulation and relevant criterion will play specification, guidance to the debugging of wet milk pulping system, performance test
Effect promotes the optimization operation of wet milk pulping system, achievees the purpose that energy-saving.
Detailed description of the invention
Fig. 1 is desulfurization wet milk lime stone pulping system overall structure diagram.
B is that wet milk belt weighs up power, t/h,
Q1It is wet milk bistrique feedwater flow, m3/ h,
Q2It is wet milk recycling tank feedwater flow, m3/ h,
CSIt is cyclone overflow limestone slurry fluid solid content, kg/m3,
QBottomIt is outflow cyclone limestone slurry flow quantity, kg/m3,
QEnterIt is to flow into cyclone limestone slurry flow quantity, kg/m3,
QIt overflows, 1It is cyclone overflow limestone slurry flow quantity, m3/ h,
QIt overflows, 2It is the limestone slurry flow quantity that overflow enters limestone slurry liquid case, m3/h。
Specific embodiment
Below with reference to specific embodiment, the invention will be further described.
A kind of desulfurization wet milk lime stone pulping system performance test methods, it is made of stones with Guigang power plant desulfurization wet milk lime
For starching system performance testing, Guigang power plant #2 grinding machine is tested, this desulfurization wet milk lime stone pulping system is that in-service desulfurization is wet
Grinding machine pulping system, steel ball are the steel ball after just screening, the specific steps are as follows:
1 preparation
1.1 lime stone belts claim to check, it is ensured that it is accurate to weigh.
Densitometer used in the lime stone slurry density of 1.2 pairs of cyclone inlets is checked with process water, makes density
Meter reading is shown in 0.8-1.2kg/L.
1.3 test limestone granularity used meet design≤20mm requirement.
Steel ball meets Mill Design requirement, various diameter steel balls by sorting, various diameter steel ball weights in 1.4 grinding machines
Ratio is as follows:
Table 1
1.5 inspections ensure each eddy flow of limestone slurry liquid swirler without blocking, and bottom sand settling mouth does not have wear phenomenon.
Before 1.6 are tested, limestone slurry liquid case liquid level should be at 5 meters or less.
If boiler load is lower during 1.7 tests, only starting test grinding machine operation as far as possible, another spare.
Prepare sufficient sampling bottle before 1.8 tests, and performs label.
2 test process
By test lime stone particle sice in serosity come calculate limestone slurry liquid swirler circulating ratio, wet milk maximum output,
Wet milk optimum charge of balls, wet milk unit power consumption, specific performance test method include:
The test method of 2.1 limestone slurry liquid swirler circulating ratios: to limestone slurry liquid swirler underflow limestone slurry
Liquid, cyclone overflow lime stone slurry and cyclone inlet lime stone slurry are sampled respectively, and every 30min sampling is primary, often
Sub-sampling 500ml is at least sampled three times, referring to DL/T 1483 " wet desulfurization of flue gas by limestone-gypsum method cycle chemistry and physics
Characteristic test method " calculate separately and record cyclone underflow lime stone slurry, the cyclone overflow lime stone of each sample time
The fineness of slurries and cyclone inlet lime stone slurry；
The limestone slurry liquid swirler circulating ratio k of different sample times is calculated as follows, and results are averaged:
In formula:
Rbtf--- cyclone underflow lime stone slurry fineness, %；
Rovf--- cyclone overflow lime stone slurry fineness, %；
Rinf--- cyclone inlet lime stone slurry fineness, %；
Specific test data is shown in Table 2.
Table 2
K takes average value three times, that is, calculates to obtain k=8.53.
kValue is bigger, and diameter≤44 μm limestone solid returns to wet milk just the more by underflow, and cyclone separating effect is just
Poorer, it needs to adjust cyclone eddy flow, feed distributor, improves separating effect.After adjusted cyclone, then sub-sampling, tool
Volume data is shown in Table 3.
Table 3
K takes average value three times, that is, calculates to obtain k=3.51
K value becomes smaller, and cyclone separating effect improves.
The test method of 2.2 wet milk maximum output and optimum charge of balls: steel ball loading capacity isW 1 , driving motor
Running currentI 1 , day-to-day operation, which is contributed, isB w1 , specific testing procedure is as follows:
Step S1: according to DL/T 1483 " wet desulfurization of flue gas by limestone-gypsum method cycle chemistry and physical characteristic test side
Method ", the density of sampling analysis cyclone overflow lime stone slurryρ ovf With cyclone overflow lime stone slurry finenessR ovf ；
Step S2: whenρ ovf In 1.187kg/L-1.233kg/L range andR ovf ≤ 10%, then gradually increase wet-milling weighing
The lime stone feeding coal and steel ball loading capacity that belt claimsW 1 , while sampling analysis cyclone overflow lime stone slurryR ovf ；
Step S3: whenR ovf When >=10%, terminates lime stone feed and steel ball loads, obtain optimum charge of balls W max ,
The lime stone maximum feeding coal of wet milk belt of weighing display is referred to as wet milk maximum outputB W1, max , unit t/h, accordingly at this time
Wet milk driving motor running current isI w1,max , unit A；
Specific data are shown in Table 4.
Table 4
Show that the best useful load of steel ball reaches 85t, wet milk power output reaches 27.2 t/h of maximum value.
The test method of 2.3 wet milk unit power consumptions:
Step S4: before test, the steel ball loading capacity and wet milk power output of wet milk are recorded；
Step S5: wet milk driving motor electric energy meter reading, the two difference are wet-milling at the end of when record test starts
The electricity consumption of machine driving motor；
Step S6: lime stone weighing belt adds up lime stone gauge reading, the two difference at the end of when record test starts
For the lime stone amount ground；
Step S7: wet milk unit power consumption is calculated as follows:
In formula:
E--- wet milk unit power consumption, kWh/t；
ΔE--- wet milk driving motor electricity consumption, kWh during test；
ΔB--- the lime stone amount that wet milk is ground during test, t.
WhereinΔE=ETerminate-EStart
EStart--- ammeter is read when test starts
ETerminate--- ammeter is read at the end of test
WhereinΔB=BTerminate-BStart
BStart--- the reading of lime stone amount when test starts
BTerminate--- the reading of lime stone amount at the end of test
Testing time is 4h.
Specific data are shown in Table 5.
Table 5
Test obtains wet milk unit power consumption E, and the power consumption feelings of wet milk lime stone pulping system can be judged by the size of E
Condition.
Claims (7)
1. a kind of desulfurization wet milk lime stone pulping system performance test methods, it is characterised in that: by testing lime stone slurry
Fineness calculates limestone slurry liquid swirler circulating ratio, and the specific test method is as follows: to limestone slurry liquid swirler underflow stone
Lime stone slurries, cyclone overflow lime stone slurry and cyclone inlet lime stone slurry are sampled respectively, every 30min sampling one
Secondary, every sub-sampling 500ml at least samples cyclone underflow lime stone slurry, the eddy flow for calculating and recording each sample time three times
The fineness of device overflow lime stone slurry and cyclone inlet lime stone slurry；
The limestone slurry liquid swirler circulating ratio k of different sample times is calculated as follows, and results are averaged:
In formula:
Rbtf--- cyclone underflow lime stone slurry fineness, %；
Rovf--- cyclone overflow lime stone slurry fineness, %；
Rinf--- cyclone inlet lime stone slurry fineness, %；
Further include the test method of wet milk maximum output and optimum charge of balls: steel ball loading capacity isW 1 , driving motor operation
Electric currentI 1 , day-to-day operation, which is contributed, isB w1 , specific testing procedure is as follows:
Step S1: the density of sampling analysis cyclone overflow lime stone slurryρ ovf With cyclone overflow lime stone slurry finenessR ovf ；
Step S2: whenρ ovf In 1.187kg/L-1.233kg/L range andR ovf ≤ 10%, then gradually increase wet-milling belt of weighing
The lime stone feeding coal and steel ball loading capacity of titleW 1 , while sampling analysis cyclone overflow lime stone slurryR ovf ；
Step S3: whenR ovf When >=10%, terminates lime stone feed and steel ball loads, obtain optimum charge of balls W max , wet-milling
The lime stone maximum feeding coal of machine belt of weighing display is referred to as wet milk maximum outputB W1, max , unit t/h, accordingly wet-milling at this time
Machine driving motor running current isI w1,max , unit A；
During performance test, wet milk slurrying is with water solid content less than 2%.
2. desulfurization wet milk lime stone pulping system performance test methods according to claim 1, it is characterised in that: also wrap
Include the test method of wet milk unit power consumption:
Step S4: before test, the steel ball loading capacity and wet milk power output of wet milk are recorded；
Step S5: wet milk driving motor electric energy meter reading, the two difference are wet milk drive at the end of when record test starts
The electricity consumption of dynamic motor；
Step S6: lime stone weighing belt adds up lime stone gauge reading at the end of when record test starts, and the two difference is mill
The lime stone amount of system；
Step S7: wet milk unit power consumption is calculated as follows:
In formula:
E--- wet milk unit power consumption, kWh/t；
ΔE--- wet milk driving motor electricity consumption, kWh during test；
ΔB--- the lime stone amount that wet milk is ground during test, t.
3. desulfurization wet milk lime stone pulping system performance test methods according to claim 1, it is characterised in that: by 1/
4W max ExtremelyW max Section be divided into 10 equal parts, gradually to wet milk increase steel ball, repeat S2 testing procedure, and record steel ball loading
AmountW 1 If any one of following three conditions, which meet, terminates test:
A, wet milk steel ball loading capacity has reached wet milk design maximum loading；
B, wet milk driving motor running current, which has reached it, allows maximum current；
C, carry out fineness occur when power output test after the increase of wet milk steel ball loading capacity for the first timeR ovf ≥10%。
4. desulfurization wet milk lime stone pulping system performance test methods according to claim 1, it is characterised in that: test
The requirement of time:
A, in 2 months after desulphurization system test run of newly-built desulfurization wet milk lime stone pulping system performance test into
Row；
B, in-service desulfurization wet milk pulping system performance test carries out in two weeks after steel ball screening operation.
5. desulfurization wet milk lime stone pulping system performance test methods according to claim 2, it is characterised in that: test
Time is 4-6h.
6. desulfurization wet milk lime stone pulping system performance test methods according to claim 1, it is characterised in that: described
The requirement of wet milk steel ball loading capacity is as follows:
The newly-built wet milk steel ball loading capacity of I should make wet milk lime stone pulping system power output be close to or up to wet-milling after debugging
The designed productive capacity of machine；
II is more than 3 months wet milks to runing time, needs all to take the steel ball in grinding machine before being tested for the property
Out, screening is re-started, the steel ball that diameter is less than 30mm and breakage is discarded, is increased again in the different-diameter steel ball ratio discarded
Add, so that wet milk lime stone pulping system power output is close to or up to the production capacity of wet milk design.
7. desulfurization wet milk lime stone pulping system performance test methods according to claim 1 or 2, it is characterised in that:
During test, the raw limestone granularity ground is less than 20mm or meets design requirement.
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| CN107376629B (en) * | 2017-07-03 | 2020-01-24 | 清华大学 | Method for determining limestone desulfurization reaction activity index and optimal particle size |
| CN109569809A (en) * | 2018-11-13 | 2019-04-05 | 北京国电龙源环保工程有限公司 | A kind of desulfurization based on big data grinds system steel ball method of adjustment and system |
| CN113713914A (en) * | 2021-08-30 | 2021-11-30 | 华能国际电力股份有限公司上海石洞口第一电厂 | Wet limestone pulping system based on density distribution |
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| CN104568654A (en) * | 2014-12-16 | 2015-04-29 | 广西电网有限责任公司电力科学研究院 | Method for measuring density of limestone slurry in limestone-gypsum wet flue gas desulfurization system |
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| CN104568654A (en) * | 2014-12-16 | 2015-04-29 | 广西电网有限责任公司电力科学研究院 | Method for measuring density of limestone slurry in limestone-gypsum wet flue gas desulfurization system |
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| 《湿磨机制浆系统性能试验标准制定》;林朝扶 等;《广西电力》;20160831;第39卷(第4期);第10-14页 |
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