CN1131426C - Initial adhesion temperature testing method and device for mixed material - Google Patents
Initial adhesion temperature testing method and device for mixed material Download PDFInfo
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- CN1131426C CN1131426C CN 01118468 CN01118468A CN1131426C CN 1131426 C CN1131426 C CN 1131426C CN 01118468 CN01118468 CN 01118468 CN 01118468 A CN01118468 A CN 01118468A CN 1131426 C CN1131426 C CN 1131426C
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- initial adhesion
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- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 34
- 239000000203 mixture Substances 0.000 claims description 20
- 235000012239 silicon dioxide Nutrition 0.000 claims description 17
- 239000000377 silicon dioxide Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000009530 blood pressure measurement Methods 0.000 claims description 10
- 238000010998 test method Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 5
- 238000013480 data collection Methods 0.000 claims description 4
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 238000013507 mapping Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000000704 physical effect Effects 0.000 abstract description 2
- 239000011343 solid material Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 4
- 239000010883 coal ash Substances 0.000 description 3
- LIXXICXIKUPJBX-UHFFFAOYSA-N [Pt].[Rh].[Pt] Chemical compound [Pt].[Rh].[Pt] LIXXICXIKUPJBX-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
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Abstract
The present invention discloses a method and a device for testing the initial bonding temperature of mixed materials, which relates to the field of the physical property testing technology of solid materials. In the method, measured materials in a certain quantity are pressed to form a cylindrical shape in a testing tube; the testing tube is heated, and compressed air is led into the testing tube; a pressure measuring device and a data collecting and processing system measure and calculate the pressure difference between both ends of a material outlet column, and the pressure difference is used for making a drawing of temperature rise so as to obtain a pressure difference and temperature rise curve; consequently, the initial bonding temperature of mixed materials is obtained. The method and the device not only effectively solve the problems of high price of an expansion appliance and high testing cost but also accurately and conveniently measure the initial bonding temperature of mixed materials with different expanding coefficients.
Description
Technical field
The invention belongs to the physical property measurement technical field of solid material, particularly a kind of method of testing and device of mixed bed material initial adhesion temperature.
Background technology
In the prior art, the particle initial adhesion temperature all has great significance to the operation of burning and chemical engineering process etc.Advantages such as for example the fluidized bed burned-coal technology is one of high-efficiency low-pollution clean burning technology of coal, and it has the efficient height, and SOx and NOx discharge capacity are less.But the specific operating conditions of fluidized bed has also been brought the reunion and the deposition problems of coal ash mixture material, for example in the poly-group of local granule that gas distribution grid produces, even causes dead band full bed coking; The deposition of fine grained ash on gas-circulating system and heat exchanger tube, and the bridge formation obstruction in the hot gas filtration system etc.The initial adhesion temperature of coal ash is the important parameter of particle in high temperature fluidized bed operation, and its accurate mensuration is the basis of high temperature fluidized bed exploitation and design, and is the important parameter of above-mentioned technological process operation.The mensuration of the minimum sticking temperature of particle adopts the dilatometer method usually in the prior art.The measuring principle and the operation steps of this method are as follows: tested material is joined in the dilatometer testing tube, and the piston of a connection thermopair is equipped with on testing tube top, and piston is associated with a silicon sensor outward.Variation according to testing tube stock column length in heating process obtains the particle initial adhesion temperature.The shortcoming of this technology is that proving installation costs an arm and a leg, and testing cost is higher; And can only measure the material of one-component.And,, therefore adopt the dilatometer method can't accurately record the initial adhesion temperature of mixture because different components have different expansion coefficient for mixture with different components.
Summary of the invention
Purpose of the present invention and task provide a kind of method of testing and device of mixture initial adhesion temperature, and make it effectively solve dilatometer and cost an arm and a leg, the problem that testing cost is high, and can accurately record the initial adhesion temperature of mixture.
Purpose of the present invention and task are achieved by the following technical solution: a kind of method of testing of mixture initial adhesion temperature, and the steps characteristic of its method of testing is:
A. tested a certain amount of mixture is encased in the testing tube, adopts the pressure measurement device under certain pressure, it to be pressed into column, and write down its length;
B. described testing tube heating is also fed pressurized air therein, air mass flow should remain on 10～20ml/min, and temperature rise rate is 10 ℃/min;
C. utilize device for pressure measurement and data acquisition and disposal system,, record the pressure reduction and the pairing temperature value of this pressure reduction at testing tube two ends under the different temperatures by the length that writes down above-mentioned stock column, the flow velocity of the interior gas of pipe, the viscosity and the infiltration coefficient of air;
D. utilize pressure reduction that the temperature rise mapping is obtained the pressure reduction temperature rise curve, the temperature value of the some correspondence when pressure reduction is reduced by maximal value on the curve is the initial adhesion temperature of mixture.
In order to measure accurately, the tested material amount should be in the scope of 3.5～5g, and the pressure that stock column adopts during compacting in testing tube should be between 0.6～1.0Mpa.
Realize the proving installation of a kind of mixture initial adhesion temperature of above-mentioned method of testing, it is mainly by testing tube that tested material is housed and heating arrangement thereof, temperature control equipment and data Collection ﹠ Processing System are formed, it is characterized in that described testing tube and heating arrangement thereof adopt the high-purity silicon dioxide pipe and be arranged on the outside silicon-carbon tubular heater of this pipe, end at silicon dioxide tube is connected with gas flow adjusting and control system, and this system takes into account gas pipeline by flow control valve, mass rate and forms; Described silicon dioxide tube two ends are connected with the differential pressure measurement device, described differential pressure measurement device is made up of the high-pressure side pressure pipe that is connected with the silicon dioxide tube two ends respectively, low pressure end pressure pipe and the differential pressure transmitter that links to each other with the pressure pipe, the output terminal of this differential pressure transmitter links to each other with data presentation and disposal system, and this system is made up of A/D analog to digital converter and computing machine.
The present invention compared with prior art has the following advantages and beneficial effect: this proving installation and method have not only effectively solved the swollen valuation lattice costliness that rises, the problem of testing cost height (test fee is once up to nearly 1,000 yuan). and for mixture initial adhesion temperature with different expansion coefficient, can be accurately, measured easily.
Description of drawings
Fig. 1 is the structural representation of proving installation of the present invention.
Fig. 2 is the pressure reduction and the temperature curve of coal ash.
Fig. 3 is the hardware configuration figure of data Collection ﹠ Processing System.
The title of each parts is described as follows among the figure:
1. flow control valve; 2. mass flowmeter; 3. silicon-carbon tubular furnace; 4. stock column; 5. high-purity silicon dioxide pipe; 6. platinum-rhodium-platinum thermocouple; 7. low pressure end pressure pipe; 8.PID temperature control equipment 9. differential pressure transmitters; 10.A/D converter; 11. computing machine; 12. high-pressure side pressure pipe.
Embodiment
Specifically describe concrete structure of the present invention, principle, testing procedure and preferred forms below in conjunction with accompanying drawing:
This proving installation is mainly by testing tube that tested material is housed and heating arrangement thereof, temperature control equipment and data Collection ﹠ Processing System are formed, and it is characterized in that described testing tube and heating arrangement thereof adopt high-purity silicon dioxide pipe 5 and be arranged on the outside silicon-carbon tubular heater 3 of this pipe; End at silicon dioxide tube is connected with gas flow adjusting and control system, and this system is made up of flow control valve 1, mass flowmeter 2 and gas pipeline; Described silicon dioxide tube 5 two ends are connected with the differential pressure measurement device, described differential pressure measurement device is made up of the high-pressure side pressure pipe 12 that is connected with the silicon dioxide tube two ends respectively, low pressure end pressure pipe 7 and the differential pressure transmitter 9 that links to each other with the pressure pipe, the output terminal of this differential pressure transmitter links to each other with data presentation and disposal system, and this system is made up of A/D analog to digital converter 10 and computing machine 11.
Principle of work of the present invention is as follows:
According to Darcy's law:
In the following formula, Δ p is the pressure drop at testing tube two ends, and L is the length of stock column, and u is the speed of gas in the testing tube, and η is the viscosity of air, B
0Be infiltration coefficient.
Along with temperature raises, air viscosity raises, and it is big that the pressure drop at testing tube two ends will become; When reaching initial adhesion temperature, stock column begins to shrink, and between the stock column, formed new passage between stock column and the testing tube, the pressure drop at stock column two ends reduces.Therefore, a flex point has appearred on stock column pressure drop and the temperature curve.This point is the minimum sticking temperature of corresponding mixture.
Air from compressor enters flow control valve 1 and mass flowmeter 2, enter coupled high-purity silicon dioxide pipe 5 through gas pipeline (flexible pipe), stock column 4 is by 3 heating of silicon-carbon tubular furnace, and heating-up temperature is controlled by platinum-rhodium-platinum thermocouple 6 and PID temperature control equipment 8.When beginning to test, at first regulate flow control valve, make the reading of mass flowmeter be controlled at 10～20ml/min, the tubular furnace heating rate should be 10 ℃/min.The pressure drop at stock column 4 two ends is measured by pressure tester, low pressure pressure pipe 7 and high pressure pressure pipe 12 that this pressure tester comprises differential pressure transmitter 9 and is arranged on silicon dioxide tube 5 two ends.Differential pressure transmitter 9 should adopt a small amount of path difference pressure transmitter of 0～5000pa.
The differential pressure transmitter output terminal links to each other with A/D analog to digital converter 10 and computing machine 11, can carry out online mensuration.When temperature is elevated to 700 ℃ process from room temperature, should gather one time pressure signal in per 0.2～1.0 minute, the sampling time is 10 seconds; And when temperature rose to 1500 ℃ by 700 ℃, the time interval of image data can be greatly, and collection in general per 1.0～2.0 minutes once gets final product.Noting pressure difference and temperature value in the process of the test, is that horizontal ordinate, pressure difference are the ordinate mapping with the temperature value, and the temperature of maximum point correspondence is the initial adhesion temperature of the mixture of surveying on this curve.
Be accurately to measure the initial adhesion temperature of mixture, the diameter of above-mentioned hard high-purity silicon dioxide pipe 5 should be in the scope of 10～12mm, and should the maintenance level to prevent the influence of gravity to test result.In order to test accurately, material sample amount should be got 3.5～5g, and the pressure that the material sample adopts during compacting in pipe should be 0.6～1.0Mpa.
Claims (4)
1, a kind of method of testing of mixture initial adhesion temperature, the steps characteristic of its method of testing is:
A. tested a certain amount of mixture is encased in the testing tube, adopts the pressure measurement device under certain pressure, material to be pressed into column, and write down its length;
B. described testing tube heating is also fed pressurized air therein, air mass flow should remain on 10～20ml/min, and temperature rise rate is 10 ℃/min;
C. utilize device for pressure measurement and data acquisition and disposal system,, record the pressure reduction and the pairing temperature value of this pressure reduction at testing tube two ends under the different temperatures by the length that writes down above-mentioned stock column, the flow velocity of the interior gas of pipe, the viscosity and the infiltration coefficient of air;
D. utilize pressure reduction that the temperature rise mapping is obtained the pressure reduction temperature rise curve, the temperature value of the some correspondence when pressure reduction is reduced by maximal value on the curve is the initial adhesion temperature of mixture.
2, according to the method for testing of the described a kind of mixture initial adhesion temperature of claim 1, it is characterized in that described tested material amount should be 3.5g～5g, the pressure when this material is pressed into column should be got 0.6～1.0Mpa.
3, adopt the proving installation of a kind of mixture initial adhesion temperature of method according to claim 1, it is mainly by testing tube that tested material is housed and heating arrangement thereof, temperature control equipment and data Collection ﹠ Processing System are formed, it is characterized in that described testing tube and heating arrangement thereof adopt the high-purity silicon dioxide pipe and be arranged on the outside silicon-carbon tubular heater of this pipe, end at silicon dioxide tube is connected with gas flow adjusting and control system, and this system takes into account gas pipeline by flow control valve, mass rate and forms; Described silicon dioxide tube two ends are connected with the differential pressure measurement device, described differential pressure measurement device is made up of the high-pressure side pressure pipe that is connected with the silicon dioxide tube two ends respectively, low pressure end pressure pipe and the differential pressure transmitter that links to each other with the pressure pipe, the output terminal of this differential pressure transmitter links to each other with data presentation and disposal system, and this system is made up of A/D analog to digital converter and computing machine.
4,, it is characterized in that the diameter of described silicon dioxide tube should be controlled at 10～12mm according to the proving installation of the described a kind of mixture initial adhesion temperature of claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01118468 CN1131426C (en) | 2001-06-01 | 2001-06-01 | Initial adhesion temperature testing method and device for mixed material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01118468 CN1131426C (en) | 2001-06-01 | 2001-06-01 | Initial adhesion temperature testing method and device for mixed material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1323986A CN1323986A (en) | 2001-11-28 |
| CN1131426C true CN1131426C (en) | 2003-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01118468 Expired - Fee Related CN1131426C (en) | 2001-06-01 | 2001-06-01 | Initial adhesion temperature testing method and device for mixed material |
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| Country | Link |
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| CN (1) | CN1131426C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784752B (en) * | 2016-04-27 | 2019-05-28 | 新奥科技发展有限公司 | A kind of carbon raw material sintering temperature measurement device and its measuring method, measurement system |
| CN106198602A (en) * | 2016-07-01 | 2016-12-07 | 电子科技大学 | A kind of measurement device for thin-film material thermophysical property |
| CN115032117B (en) * | 2022-06-16 | 2023-04-07 | 江苏理工学院 | Cooling medium viscosity performance testing device and working method thereof |
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2001
- 2001-06-01 CN CN 01118468 patent/CN1131426C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1323986A (en) | 2001-11-28 |
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