CN101915714A - Method for judging dewatering performance of different plasters - Google Patents
Method for judging dewatering performance of different plasters Download PDFInfo
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- CN101915714A CN101915714A CN 201010263706 CN201010263706A CN101915714A CN 101915714 A CN101915714 A CN 101915714A CN 201010263706 CN201010263706 CN 201010263706 CN 201010263706 A CN201010263706 A CN 201010263706A CN 101915714 A CN101915714 A CN 101915714A
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- grout
- dewatering performance
- judging
- different
- slurries
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000007787 solid Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 229910052602 gypsum Inorganic materials 0.000 claims description 41
- 239000010440 gypsum Substances 0.000 claims description 41
- 239000002002 slurry Substances 0.000 claims description 38
- 210000002966 serum Anatomy 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006477 desulfuration reaction Methods 0.000 abstract description 4
- 230000023556 desulfurization Effects 0.000 abstract description 4
- 239000003546 flue gas Substances 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 4
- 239000011440 grout Substances 0.000 abstract 6
- 239000011505 plaster Substances 0.000 abstract 3
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 abstract 1
- 230000018044 dehydration Effects 0.000 description 7
- 238000006297 dehydration reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000000967 suction filtration Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000003828 vacuum filtration Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The invention relates to a method for judging dewatering performance of different plasters. The method comprises the following steps of: taking bottom flow grout of different plaster cyclones; adding water into the grout until the densities of the grout are the same; taking the grout with the same volume; putting the grout into graduated transparent containers respectively; uniformly stirring the grout; and judging the dewatering performance of the plasters according to the time needed by the settlement of solid in each container to the same height. Needed time is shorter, settling property is better and the dewatering performance of the plaster is better. The method has the characteristics of simple, convenient and rapid operation, a small number of apparatuses needed for testing and capability of vividly judging the dewatering performance of different plasters and is particularly suitable for the running site of a limestone-plaster wet flue gas desulfurization process in a coal-fired power plant.
Description
Technical field
The present invention relates to a kind of method of judging dewatering performance of different plasters, specifically be to be settled down to equal height required time length by volume relatively, the liquid-solid body of different gypsum cyclone underflow slurry that density is identical to judge its settling property, thereby further judge the method for gypsum dehydration effect, this evaluation method is mainly used in coal-burning power plant's limestone-gypsum wet fuel gas desulfurizing technology.
Background technology
The energy resources of China aspect power supply architecture, in the quite a long time from now on, all will present the basic configuration based on coal-fired unit based on coal.Big, the coal-fired sulfur content height of coal consumption amount will inevitably cause SO
2Discharge capacity sharply increases.Nineteen ninety-five, China SO
2Discharge capacity reaches 2,370 ten thousand tons, becomes SO in the world
2The country of discharge capacity first.In recent years, since the fast development of electric power, SO
2Discharge capacity continues to rise.According to statistics, about 3,000,000,000 tons of the coal consumption amount in the whole nation in 2009, electric power reaches 15.6 hundred million tons with coal, accounts for 52% of national coal consumption amount, and the discharging of control electric system sulphuric dioxide has great importance to controlling national sulfur dioxide (SO2) emissions.The end of the year 2003, State Environmental Protection Administration has issued the pollutant emission standard GB13223-2003 " thermal power plant's atmosphere pollutants emission standards " of new revision, to the Thermal Power Plant Construction project separate provision of different times corresponding Air Pollutant Emission control requirement; Simultaneously, new " collection of drainage dues standard and the computing method " of country make the SO of enterprise
2The blowdown cost increases.Under these circumstances, thermal power plant in all parts of the country carries out the construction of flue-gas desulfurizing engineering one after another, thereby has alleviated the environmental pollution caused by discharge of sulphuric dioxide greatly.
In various flue gas desulfurization techniques, the limestone-gypsum wet fuel gas desulfurizing technology becomes most widely used flue gas desulfurization technique of present stage with its plurality of advantages.In this technological process, the higher absorption tower slurries of density are after through gypsum rotational flow device concentrating and separating, and the swirler underflow slurries that particle diameter is big, solid content is high obtain the solid gypsum after the vacuum hydroextractor processed; Therefore, the character of gypsum rotational flow device underflow slurries has directly determined the dehydrating effect of gypsum.
The dehydrating effect of gypsum characterizes with the gypsum water percentage usually.The gypsum water percentage also is an important indicator of gypsum quality, and in general, the height of measuring the gypsum water percentage adopts gravimetric method (seeing GB/T5484-2000), promptly takes by weighing the gypsum (m of certain mass
1), (45 ℃ ± 3 ℃) dry to constant weight m under fixed temperature
2, the quality (m of minimizing
1-m
2) be contained humidity.
Gypsum water percentage (%)=(m
1-m
2)/m
1* 100%
This assay method is more feasible under laboratory condition, but at the operation scene of sulfur removal technology, and is consuming time for a long time to constant weight because of drying, need baking oven and day equality equipment, implements to acquire a certain degree of difficulty; In addition, this method of testing can only be carried out behind gypsum dehydration, can not play a pre-effect of judging to the dewatering of slurries.
The report of gypsum dehydration performance quality does not appear directly judging by the slurries settling property so far, both at home and abroad as yet.The present invention aim to provide a kind of simple and efficient to handle, the required instrument of test is few, method that can the intuitive judgment dewatering performance of different plasters, this method is particularly useful for the operation scene of sulfur removal technology.
Summary of the invention
It is a kind of simple and efficient to handle that the object of the invention is to provide, and tests few, the method that can the intuitive judgment dewatering performance of different plasters of required instrument, and this method is particularly suitable for the operation scene of sulfur removal technology.
For achieving the above object, the present invention adopts following technical scheme:
A kind of method of judging dewatering performance of different plasters, this method is: get different gypsum cyclone underflow slurries, adding water, to be adjusted to serum density be identical value (this moment, the solids content in the slurries was also identical), get the above-mentioned slurries of equal volume then, it is placed band scale transparent vessel respectively, after stirring, be settled down to equal height required time length according to solid in each container and judge.
Described band scale transparent vessel is graduated cylinder or beaker.
Described band scale transparent vessel outer wall has altitude scale.
Beneficial effect of the present invention:
The present invention passes judgment on the quality of gypsum dehydration effect by the settling property of observing gypsum rotational flow device underflow slurries, this method experimental phenomena is directly perceived, it is few and simple to operation to test required instrument, be convenient to power plant and grasp the gypsum dehydration changes of properties, in time the operation of desulphurization system is adjusted, had stronger using value.At the desulfurization operation scene, can adopt the inventive method, get an amount of different gypsum cyclone underflow slurries and place a plurality of containers respectively, add water and regulate serum density to identical value, get the above-mentioned slurries of equal volume then, it is placed band scale transparent vessel respectively, after stirring, be settled down to equal height required time length according to solid in each container and judge the quality of its settling property, thereby judge its dewatering and variation tendency.
Description of drawings
What Fig. 1 showed is the graduated cylinder that posts altitude scale coordinate paper;
What Fig. 2 showed is the settling height of solid in the slurries;
What Fig. 3 showed is the settlement-time curve of three kinds of slurries;
What Fig. 4 showed is slurries vacuum filtration apparatus structure synoptic diagram.
Embodiment
Below in conjunction with embodiment the present invention is described in further details, but protection domain of the present invention is not limited thereto.
Embodiment 1
A kind of method of judging dewatering performance of different plasters, this method is: get three parts of different gypsum cyclone underflow slurries to be measured with beaker respectively, add the density that water is adjusted to three parts of slurries and be 1.1g/ml, the graduated cylinder that posts altitude scale coordinate paper with outer wall is as shown in Figure 1 measured three kinds of identical slurries of density respectively to coordinate paper 0cm scale mark place (being labeled as graduated cylinder 1,2 and 3), after stirring, leave standstill, measure the time required when solid reaches identical settling height (as shown in Figure 2, settling height is the vertical range between liquid level and the solid-liquid interface) in each graduated cylinder.
Know that through measurement required time was 6.5min when the solid settling height was stopped to 14cm in the graduated cylinder 1, required time was 17min when the solid settling height was stopped to 14cm in the graduated cylinder 2, and required time was 19min when the solid settling height was stopped to 14cm in the graduated cylinder 3.Hence one can see that, and the solid settling velocity is the fastest in the graduated cylinder 1, illustrates that the gypsum settling property is best in the graduated cylinder 1, and then its dewatering is best, and 2 take second place, and 3 is the poorest.
A kind of method of judging dewatering performance of different plasters, this method is: get two parts of different gypsum cyclone underflow slurries to be measured with beaker respectively, add the density that water is adjusted to two parts of slurries and be 1.1g/ml, the graduated cylinder that posts altitude scale coordinate paper with outer wall is as shown in Figure 1 measured two kinds of identical slurries of density respectively to coordinate paper 0cm scale mark place (being labeled as graduated cylinder d and e), after stirring, leave standstill required time when measuring solid in each graduated cylinder and reaching identical settling height.
Required time was 12min when the solid settling height was stopped to 14cm in the graduated cylinder d, and required time was 12min when the solid settling height was stopped to 14cm in the graduated cylinder e.Hence one can see that, and required time was identical when solid reached identical settling height in graduated cylinder d, the e, illustrated that the gypsum dehydration performance of putting into graduated cylinder d, e is similar.
The theoretical foundation of technical solution of the present invention: to be settled down to the equal height required time short more for solid in the slurries, illustrates that the settling property of these slurries is good more, and corresponding its dewatering is good more, and confirmatory experiment is as follows:
(1) mensuration of settling time: get variety classes gypsum cyclone to be measured underflow slurries respectively, add water and regulate density to 1.1g/ml, it (is that density is identical that the graduated cylinder that posts altitude scale coordinate paper with outer wall is as shown in Figure 1 measured the slurries of regulating after the density respectively, be 1.1g/ml) to the 0cm scale mark, measure required time when solid is settled down to equal height in the slurries.
The concrete operations step is: get three parts of different gypsum cyclone underflow slurries to be measured respectively and join in three beakers and (be designated as sample 1,2 and 3), add water and regulate density to 1.1g/ml, the graduated cylinder that posts altitude scale coordinate paper with outer wall is as shown in Figure 1 measured the identical slurries of density respectively to 0cm scale mark position, and stirrer evenly stirs 2min; Stirrer leaves liquid level and picks up counting, and extremely final solid-liquid interface no longer descends.Required time when solid is settled down to equal height in the record slurries is drawn settlement-time curve, sees Fig. 3.As shown in Figure 3, after slurries stop sedimentation, required time was 6.5min when the solid settling height was stopped to 14cm in the sample 1, and required time was 17min when the solid settling height was stopped to 14cm in the sample 2, and required time was 19min when the solid settling height was stopped to 14cm in the sample 3.Hence one can see that, and the solid settling velocity is the fastest in the sample 1, and the slurries settling property is best in the interpret sample 1, and then its dewatering is best, and 2 take second place, and 3 is the poorest.
(2) mensuration of gypsum water percentage: the slurries that are settled down to 14cm in above-mentioned each graduated cylinder are fully stirred once more, carry out suction filtration with vacuum pump respectively, after the identical time, gypsum solid is transferred in the double dish of constant weight, after weighing, put into oven for drying, and write down dried quality to constant weight.Thereby calculate the water percentage of gypsum solid.The concrete operations step is as follows:
A. the Buchner funnel of a diameter 10cm who gets ready in advance, the middling speed quantitative filter paper, three double dish quality of having weighed are x
i(i=1,2,3);
B. slurries in above-mentioned first graduated cylinder are stirred once more, pour Buchner funnel into and carry out suction filtration, vacuum pump pressure is 0.06MPa, suction filtration time 3min (slurries vacuum filtration instrumentation diagram is seen Fig. 4, and it is made up of Buchner funnel 1, bottle,suction 2, proofed sleeve 3, surge flask 4, tensimeter 5, vacuum pump 6);
C. suction filtration is good gypsum solid is transferred in the double dish, and y weighs
i(i=1);
D. repeating step b and c, recording the gypsum solid in all the other two graduated cylinders and the quality sum of double dish is y
i(i=2,3);
E. put above-mentioned three double dish that hold gypsum solid into 45 ℃ of baking ovens together, dry to constant weight, writing down its quality is z
i(i=1,2,3);
Gypsum water percentage=(y behind the suction filtration
i-z
i)/(y
i-x
i) * 100%, concrete outcome sees Table 1.
The water percentage of gypsum behind the corresponding suction filtration in each graduated cylinder of table 1
| The sample title | Sample 1 | |
Sample 3 |
| Water percentage % | 11.8 | 21.2 | 28.5 |
Interpretation of result: by Fig. 2,3 and table 1 as can be seen, slurries solid sedimentation required time is short more, the water percentage in the corresponding gypsum solid is low more, illustrates that this kind gypsum dehydration is effective.Be under the same terms, the settling property of gypsum cyclone underflow slurries is good more, and then the dehydrating effect of gypsum is good more, and vice versa.Confirmed the feasibility of technical solution of the present invention.
Claims (3)
1. method of judging dewatering performance of different plasters, it is characterized in that, get different gypsum cyclone underflow slurries, adding water, to be adjusted to serum density be identical value, get the above-mentioned slurries of equal volume then, it is placed band scale transparent vessel respectively, after stirring, be settled down to equal height required time length according to solid in each container and judge.
2. judge the method for dewatering performance of different plasters according to claim 1, it is characterized in that described band scale transparent vessel is graduated cylinder or beaker.
3. as the method for judgement dewatering performance of different plasters as described in the claim 2, it is characterized in that described band scale transparent vessel outer wall has altitude scale.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102637069A CN101915714B (en) | 2010-08-26 | 2010-08-26 | Method for judging dewatering performance of different plasters |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102637069A CN101915714B (en) | 2010-08-26 | 2010-08-26 | Method for judging dewatering performance of different plasters |
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|---|---|
| CN101915714A true CN101915714A (en) | 2010-12-15 |
| CN101915714B CN101915714B (en) | 2012-09-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759581A (en) * | 2011-04-29 | 2012-10-31 | 中国石油化工股份有限公司 | Test method for evaluation of antirust oil dewatering performance |
| CN113063697A (en) * | 2020-07-10 | 2021-07-02 | 中铁六局集团有限公司 | Measuring assembly for serous performance and measuring method thereof |
| CN114383974A (en) * | 2022-03-23 | 2022-04-22 | 中南大学 | Device and method for measuring viscosity of low-fluidity paste |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008100317A1 (en) * | 2007-02-16 | 2008-08-21 | Mecs, Inc. | Scrubber system for the desulfurization of gaseous streams |
| CN101734870A (en) * | 2009-12-10 | 2010-06-16 | 沈阳康环脱硫石膏综合利用有限公司 | Production method of semi-hydrated gypsum powder |
-
2010
- 2010-08-26 CN CN2010102637069A patent/CN101915714B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008100317A1 (en) * | 2007-02-16 | 2008-08-21 | Mecs, Inc. | Scrubber system for the desulfurization of gaseous streams |
| CN101734870A (en) * | 2009-12-10 | 2010-06-16 | 沈阳康环脱硫石膏综合利用有限公司 | Production method of semi-hydrated gypsum powder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759581A (en) * | 2011-04-29 | 2012-10-31 | 中国石油化工股份有限公司 | Test method for evaluation of antirust oil dewatering performance |
| CN102759581B (en) * | 2011-04-29 | 2014-06-18 | 中国石油化工股份有限公司 | Test method for evaluation of antirust oil dewatering performance |
| CN113063697A (en) * | 2020-07-10 | 2021-07-02 | 中铁六局集团有限公司 | Measuring assembly for serous performance and measuring method thereof |
| CN114383974A (en) * | 2022-03-23 | 2022-04-22 | 中南大学 | Device and method for measuring viscosity of low-fluidity paste |
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| Publication number | Publication date |
|---|---|
| CN101915714B (en) | 2012-09-05 |
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Address after: 450052 Songshan, Zhengzhou, Henan District No. 27 South Road, No. 85 Patentee after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee after: State Grid Corporation of China Address before: 450052 Songshan South Road, Henan, No. 85, No. Patentee before: Henan Electric Power Corporation Electric Power Science Research Institute Patentee before: State Grid Corporation of China |
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Address after: 450052 No. 85 South Songshan Road, 27 District, Henan, Zhengzhou Co-patentee after: Henan jiuyu enpai Power Technology Co.,Ltd. Patentee after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Co-patentee after: State Grid Corporation of China Address before: 450052 No. 85 South Songshan Road, 27 District, Henan, Zhengzhou Co-patentee before: HENAN ENPAI HIGH-TECH GROUP Co.,Ltd. Patentee before: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Co-patentee before: State Grid Corporation of China |