CN1536351A - Method and device for quickly determining coal ash by using oxygen bomb process - Google Patents
Method and device for quickly determining coal ash by using oxygen bomb process Download PDFInfo
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- CN1536351A CN1536351A CNA031131301A CN03113130A CN1536351A CN 1536351 A CN1536351 A CN 1536351A CN A031131301 A CNA031131301 A CN A031131301A CN 03113130 A CN03113130 A CN 03113130A CN 1536351 A CN1536351 A CN 1536351A
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Abstract
The invention provides an oxygen bomb fast coal ash determining method, its main technical project is to control oxygen gas diffusing speed and use international oxygen bomb combustion property to determine residual ash quantity and then calculate out the coal ash.
Description
Described technical field
The invention belongs to the coal analysis test, be specifically related to a kind of ash content of coal rapid assay methods.
Background technology
Ash content is a basic foundation of estimating Coal Quality.No matter thermal power plant boiler burning, steel plant's blast furnace metallurgy, or cement mill cement burns till, all the ash content to coal has certain requirement, and ash content of coal is the leading indicator of coal trade, washing, ature of coal research.
The assay method of ash content mainly contains xrf analysis method and technical analysis method, and the former apparatus expensive, error are big, use not extensive; Generally all adopt technical analysis method to measure ash content of coal.
The ash determination method of national Specification has ashing method and fast incineration method slowly, and its main points all are to place muffle furnace calcination certain hour to weigh coal sample to obtain again.Though the result is accurate for these methods, complicated operation, need the time long, measuring a slow ashing method of sample needs 3-4 hour, and the fast incineration method also needs 1-2 hour; And muffle furnace power consumption is big.Therefore, traditional ash determination can not adapt to the ature of coal needs of chemical examination fast.
Summary of the invention
The present invention is directed to the deficiency of said method, utilize the bomb method principle to propose a kind of ash content of coal Rapid Determination Method.
Concrete technical scheme of the present invention is as follows: bomb method is the standard method of the mensuration heating value of coal of GB regulation, coal stays ash content naturally behind the oxygen bomb cylinder roasting, but the ash amount that stays in the crucible according to the charcoal of coalingging behind the national standard method heating-value determination is well below standard determination method, because oxygenation pressure is 2.8～3.0MPa under the thermal value standard test condition, because of oxygenation pressure big, ash content splashes and makes measurement result on the low side, adjusting experiment condition minimizing ash content splashes, in addition mathematics is proofreaied and correct again, obtains the ash measured result close with the standard method result at last.
Feature of the present invention is: utilize the bomb method of measuring heating value of coal to measure the ash amount that stays behind the coal burning earlier, determine correction coefficient according to ash content and volatile content then, calculate net result again, concrete steps are:
1) earlier the coal sample is placed in the burning crucible in the oxygen bomb tube;
2) in the oxygen bomb tube, charge into oxygen with certain pressure;
3) measure ash content residual quantity in the crucible behind the igniting burning-point;
4) determine correction coefficient according to ash content of coal and volatile content, calculate net result again.Its computing formula is:
w
0: weighing sample (g)
W: combustion back level of residue (g)
M
Ad: air-dried moisture
η: correction coefficient
A
d: ash content
A kind of device of bomb method fast measuring ash content of coal, it comprises the oxygen bomb tube, is contained in the burning crucible in the oxygen bomb tube, it is characterized in that: add one on the crucible mouth and reduce the foraminous shield that is covered with aperture all around that ash content splashes; The quantity of aperture and pore size are determined according to the quality of coal; Oxygenation pressure is 0.8-2.5MPa in the oxygen bomb tube;
The present invention measured the ash content of coal method about 5 minutes consuming time, and power consumption almost can be ignored; If with the thermal value translocation then do not need to increase workload fully, realized the purpose of ash content fast measuring.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a foraminous shield scheme of installation in the oxygen bomb tube.
Among the figure, 1. crucible frame, 2. foraminous shield, 3. crucible, 4. oxygen bomb tube.
Embodiment
This device by oxygen bomb tube (4), be contained in crucible (3) in the oxygen bomb tube, crucible frame etc. and form, on crucible (3), add a foraminous shield.
Embodiment 1
Certain coal its technical analysis result such as table 1
Table 1
| Numbering | ????Mad | ????Aad | ????Vad |
| ??1 | ????2.17 | ????23.64 | ????26.04 |
Adopt this method that oxygenation pressure is reduced to 0.8MPa, the foraminous shield periphery of one stainless steel thermal value crucible is evenly bored 8 in φ 3mm hole, cover on the thermal value crucible, positive ignition burning after the oxygenation, open oxygen bomb after 5 minutes, take by weighing experiment front and back sample and weigh, calculate the fast measuring ash content, multiply by correction coefficient 1.06 again, promptly obtain ash value.Detailed data is in table 2.
Table 2
| Numbering | Technical analysis method ash determination value | Bomb method ash determination value | |
| For the first time | For the second time | ||
| ????1 | ????23.64 | ????23.36 | ????23.65 |
Embodiment 2
Certain coal its technical analysis result such as table 3.
Table 3
| Numbering | ????Mad | ????Aad | ????Vad |
| 2 | ???2.48 | ????32.51 | ????12.84 |
Adopt this method that oxygenation pressure is reduced to 2.5MPa, the foraminous shield periphery of one stainless steel thermal value crucible is evenly bored 8 in φ 3mm hole, cover on the thermal value crucible, positive ignition burning after the oxygenation, open oxygen bomb after 5 minutes, sample is heavy before and after taking by weighing experiment, calculates the fast measuring ash content, promptly obtains ash value.Detailed data is in table 4.
Table 4
| Numbering | Technical analysis method ash determination value | Bomb method ash determination value | |
| For the first time | For the second time | ||
| ????2 | ????32.51 | ????32.35 | ????31.90 |
Claims (5)
1, a kind of method of bomb method fast measuring ash content of coal, it is characterized in that: utilize the bomb method of measuring heating value of coal to measure the ash amount that stays behind the coal burning earlier, determine correction coefficient according to ash content and volatile content then, calculate net result again, concrete steps are:
1) earlier the coal sample is placed in the burning crucible in the oxygen bomb tube;
2) in the oxygen bomb tube, charge into oxygen with certain pressure;
3) measure ash content residual quantity in the crucible after the ignition;
4) determine correction coefficient according to ash content residual quantity and volatile content, calculate net result again.
2, the method for bomb method fast measuring ash content of coal according to claim 1, it is characterized in that: ash content of coal is calculated as follows out:
w
0: weighing sample (g)
W: combustion back level of residue (g)
M
Ad: air-dried moisture
η: correction coefficient
A
d: ash content
3, the method for bomb method fast measuring ash content of coal according to claim 1 is characterized in that: oxygenation pressure is 0.8-2.5MPa in the oxygen bomb tube.
4, a kind of device of bomb method fast measuring ash content of coal, it comprises the oxygen bomb tube, is contained in the burning crucible in the oxygen bomb tube, it is characterized in that: add one on the crucible mouth and reduce the foraminous shield that is covered with aperture all around that ash content splashes.
5, the device of bomb method fast measuring ash content of coal according to claim 3 is characterized in that the quantity of aperture and pore size are definite according to the quality of coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031131301A CN1536351A (en) | 2003-04-04 | 2003-04-04 | Method and device for quickly determining coal ash by using oxygen bomb process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031131301A CN1536351A (en) | 2003-04-04 | 2003-04-04 | Method and device for quickly determining coal ash by using oxygen bomb process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1536351A true CN1536351A (en) | 2004-10-13 |
Family
ID=34319986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031131301A Pending CN1536351A (en) | 2003-04-04 | 2003-04-04 | Method and device for quickly determining coal ash by using oxygen bomb process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1536351A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571507B (en) * | 2008-04-29 | 2012-07-04 | 浙江省电力试验研究院 | Microcoulomb analysis method for chlorinity high-temperature burning of organic phosphate fire-resistant oil and device thereof |
| CN104777070A (en) * | 2015-03-20 | 2015-07-15 | 陕西科技大学 | Method using microwave muffle furnace to rapidly measure ash content of paper filled with porous calcium silicate |
| CN109269935A (en) * | 2018-09-06 | 2019-01-25 | 承德建龙特殊钢有限公司 | A kind of insulation cover and the method using filter paper ashing time in its shortening gravimetry |
| CN110031354A (en) * | 2019-04-29 | 2019-07-19 | 徐州泰瑞仪器设备有限公司 | A method of oxygen bomb is improved by addition combustion adjuvant and surveys ash content precision |
| CN114088866A (en) * | 2021-11-16 | 2022-02-25 | 江苏博云塑业股份有限公司 | Method for measuring ash content and component content of blended resin |
-
2003
- 2003-04-04 CN CNA031131301A patent/CN1536351A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571507B (en) * | 2008-04-29 | 2012-07-04 | 浙江省电力试验研究院 | Microcoulomb analysis method for chlorinity high-temperature burning of organic phosphate fire-resistant oil and device thereof |
| CN104777070A (en) * | 2015-03-20 | 2015-07-15 | 陕西科技大学 | Method using microwave muffle furnace to rapidly measure ash content of paper filled with porous calcium silicate |
| CN109269935A (en) * | 2018-09-06 | 2019-01-25 | 承德建龙特殊钢有限公司 | A kind of insulation cover and the method using filter paper ashing time in its shortening gravimetry |
| CN110031354A (en) * | 2019-04-29 | 2019-07-19 | 徐州泰瑞仪器设备有限公司 | A method of oxygen bomb is improved by addition combustion adjuvant and surveys ash content precision |
| CN110031354B (en) * | 2019-04-29 | 2022-05-10 | 徐州泰瑞仪器设备有限公司 | Method for improving ash content measurement precision of oxygen bomb by adding combustion improver to simplify measurement of different coal types |
| CN114088866A (en) * | 2021-11-16 | 2022-02-25 | 江苏博云塑业股份有限公司 | Method for measuring ash content and component content of blended resin |
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