CN1544949A - Combustible gas calorific value on-line analysis method and detecting device thereof - Google Patents
Combustible gas calorific value on-line analysis method and detecting device thereof Download PDFInfo
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- CN1544949A CN1544949A CNA2003101113808A CN200310111380A CN1544949A CN 1544949 A CN1544949 A CN 1544949A CN A2003101113808 A CNA2003101113808 A CN A2003101113808A CN 200310111380 A CN200310111380 A CN 200310111380A CN 1544949 A CN1544949 A CN 1544949A
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Abstract
The invention is a gas thermal value detecting and analyzing method and device. Its technical measures: flammable gas thermal value component on-line analyzing method, including: collecting sample gas, cooling sample gas to under 15 deg.C; then preprocessing the impurities in the sample gas; secondarily processing the sample gas and making the particle size of the impurities <=0.5mu; analyzing and detecting the bulk and content of the components in the sample gas; converting the sample gas to electric signal and calculating thermal value of each component. The device includes sampling tube and pipeline, where the pipeline behind the sampling tube is connected with a cooling tank, the cooling tank is connected with a preprocessing tank, secondary processing tank and combined component analyzing tank in turn through the pipeline, the secondary processing tank is connected with a computer through lead wires, and the combined component analyzing tank is connected with an upper computer through a network cable.
Description
Technical field
The present invention relates to the method and the device of the detection and the analysis of inflammable gas calorific value, especially belong to the method and the pick-up unit of calorific value composition on-line analysis in the mixed gas.
Technical background
The inflammable gas calorific value detects that to be forbidden be to suffer from industry recognized techniques difficult problems such as metallurgy, coloured, chemical industry, electric power for many years, and the long-term proof of using: " firing method " caloric value instrument that uses can't accurately be realized the detection of inflammable gas calorific value at present.
The detection principle of firing method: when the constant pressure air that provides via instrument internal combustion burner and instrument when tested inflammable gas is carried out combustion reaction,, realize that indirectly calorific value measures by detection to burner flame heating temp.Because constant pressure air can only realize perfect combustion to a certain specific composition of tested inflammable gas, the inflammable gas that component content (being density) is constantly being changed be not overheated be exactly rough burning.Therefore can not accurately reflect the true calorific value of tested gas, it detects principle is unscientific.
The standard transmission of quantity value difficulty of tracing to the source can't be carried out strictness to instrument and accurately be demarcated.
In the combustion process of this kind detection method, the thermal value of burner flame is subjected to: measured medium component content (being density) variation, the pressure of technology energy medium, flow, temperature, external environment condition, burner impurity cause the influence of multiple variables such as stifled, instrument commissioning experience, when the pressure of tested gas, when composition significantly changes, also can cause burning flame-out, cause stability, reliability and the accuracy of system to be difficult to guarantee.
Technology contents
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of and can make that the calorific value accuracy rate is improved, on-line continuous, fast, stablely carry out inflammable gas calorific value composition on-line analysis method and the pick-up unit thereof that calorific value detects.
Realize the technical measures of the object of the invention: inflammable gas calorific value composition on-line analysis method comprises and gathers sample gas that its characterization step also is:
(1) the sample gas that on-line continuous is collected is cooled to below 15 ℃;
(2) will carry out pre-service through the impurity in the cooled sample gas;
(3) impurity in the sample gas is carried out secondary treating, the impurity particle granularity in the sample gas after secondary treating≤0.5 μ;
(4) volume content to composition gas in the sample gas carries out analyzing and testing;
(5) sample gas converts electric signal to through instrument, and carries out the calculating of each composition calorific value by the calorific value calculation formula that is input to computing machine.
It is that chilled water is continuous blow-down.
It is that the sample gas after secondary treating adopts parallel detection.
It is the impurity in the sample gas is being carried out pre-service.When secondary treating and each composition gas analysis, all to purge.
The pick-up unit that is used for inflammable gas calorific value composition on-line analysis method, comprise stopple coupon, pipeline, it is to connect cooling cabinet on the pipeline behind the stopple coupon, behind cooling cabinet, connect pre-service cabinet, secondary treating cabinet and combined type analysis of components cabinet successively by pipeline, connect computing machine by lead cashier's office in a shop in secondary treating, connect host computer by netting twine cashier's office in a shop at the combined type analysis of components.
It is that stopple coupon installs for three sampling spots of circular radial arc at least on the inflammable gas pipeline, it is the radius of inflammable gas pipeline that stopple coupon inserts the darkest in the inflammable gas pipeline, and all the other insertion depths are all less than radius.
It is to be connected with water inlet pipe, drainpipe, compressed air hose on cooling cabinet, water and pressure gas are taken their own roads in cooling cabinet.
It is to be connected with nitrogen tube cashier's office in a shop respectively at pre-service cabinet, secondary treating cabinet and combined type analysis of components, and steam pipe is connected pre-service cashier's office in a shop.
It is to be separately installed with filtrator in cooling cabinet, pre-service cabinet and secondary treating cabinet.
It is that infrared ray instrument, thermal conductance instrument and the magnetic pressure instrument of installing are parallel connection in combined type analysis of components cabinet.
It is to be equipped with voltage stabilizer on water inlet pipe.
It is in cooling cabinet, the pre-service cabinet that installed filters is a multilayer tandem screen pack respectively, the filtrator that combines for the porcelain filter of mesh≤0.5 μ with except that the wet type screen pack in the secondary treating cabinet.
It is to be equipped with in the cooling cabinet cooling-water machine or air cooling device.
The foundation of inflammable gas calorific value composition on-line analysis method: the inflammable gas calorific value is contained various composition gas heating value sum, as long as detect the volume content of all gases composition in the inflammable gas, and in enthalpy value table, find the calorific value of each corresponding composition gas, utilize the calorific value calculation formula to obtain all gases composition calorific value sum, can obtain the calorific value of inflammable gas.
Principle of work: from the inflammable gas pipeline, take out sample gas by stopple coupon, sample gas enters cooling cabinet by pipeline, via below the water quench to 15 in the cooling cabinet ℃ and tentatively remove impurity such as dust contained in the sample gas, tar, naphthalene, the water that contains impurity such as dust, tar, naphthalene is constantly discharged by drainpipe.Through the preliminary sample gas of removing impurity by pipeline enter the pre-service cabinet further absorb water,
Prisoner's naphthalene, enter the secondary treating cabinet then and filter the suction prisoner once more, make impurity particle granularity≤0.5 μ in the sample gas.After deliver to again and enter infrared ray instrument, thermal conductance instrument and magnetic pressure instrument respectively after the combined type analysis of components cabinet condensation process all gases composition is carried out analyzing and testing.The volume content of measured all gases composition converts electric signal to, imports computing machine again by lead, and machine calculates behind the calorific value in real time and shows or printing as calculated, is sent to host computer by netting twine simultaneously.When the impurity deposition to a certain degree the time, enable nitrogen tube, steam pipe purges.
The present invention is " an analysis of components method " owing to what adopt, it is a kind of Main Ingredients and Appearance volume content contained in the inflammable gas to be carried out after on-line continuous detects, according to the standard calorific value content of every kind of gas ingredients and shared number percent number, by COMPUTER CALCULATION, can directly obtain the inflammable gas calorific value.Advantage is to guarantee analysis meter long service life, stable, selects the correlation analysis instrument owing to adopt wall units type analytic system in parallel to reach for use at the inflammable gas different components again, so can improve analysis precision and detection speed.
Description of drawings
Fig. 1 is the pick-up unit structural representation of inflammable gas calorific value composition on-line analysis method
Fig. 2 is stopple coupon and an inflammable gas piping erection structural representation among Fig. 1
Fig. 3 is a combined type analysis of components cabinet inner structure synoptic diagram among Fig. 1
Fig. 4 is a pre-service cabinet inner structure synoptic diagram among Fig. 1
Fig. 5 is a secondary treating cabinet inner structure synoptic diagram among Fig. 1
Fig. 6 is a cooling cabinet inner structure synoptic diagram among Fig. 1
Concrete technical application scheme:
Embodiment
For realizing making analysis meter stable, realize on-line continuous, express-analysis, make the calorific value accuracy rate of its needed sample gas purpose that is improved, be described in further detail below in conjunction with accompanying drawing:
Mixed gas composition calorific value on-line analysis method, its step is: in cooling cabinet (3), water in the water inlet pipe (12) enters cooling cabinet (3) behind voltage stabilizer (24), pressurized air in the compressed air hose (14) cools off water by air cooling device (25), with the sample gas that collects in the mixed gas pipeline (11) of blast furnace or coke oven continuously in cooling cabinet (3) by below the water quench to 15 ℃, make impurity such as contained dust in the mixed gas sample gas, tar, naphthalene obtain rough handling, its impurity is by drainpipe (13) continuous blow-down; Mixed gas sample gas after rough handling enters pre-service cabinet (4) by pipeline (2) again, makes impurity such as dust contained in the mixed gas sample gas, tar, naphthalene obtain pre-service; Impurity in the pretreated mixed gas sample gas is handled in secondary treating cabinet (5) once more, and the impurity particle granularity requirements in the sample gas after handling once more is less than 0.5 μ; In combined type analysis of components cabinet (6), in the infrared ray instrument that is connected in parallel (20,21), thermal conductance instrument (22) and (23) four instrument of magnetic pressure instrument respectively to CO, CO in the mixed gas sample gas
2, CH
4, H
2, O
2, CmHn Main Ingredients and Appearance gas volume content carry out analyzing and testing, wherein CO, CO
2, CH detects in infrared ray instrument (20), CmHn detects H in infrared ray instrument (21)
2In thermal conductance instrument (22), detect O
2In magnetic pressure instrument (23), detect N
2Draw as calculated; CO, CO
2, CH
4, H
2, O
2, CmHn converts electric signal to after infrared ray instrument (20,21), thermal conductance instrument (22) and magnetic pressure instrument (23) detect, and carry out the calculating of each composition calorific value by the calorific value calculation formula that is input to computing machine (8), offers the user then.
Work after a week, start purging system, make the nitrogen in the nitrogen tube (15), the steam in the steam pipe (16) is after cooling cabinet (3), pre-service cabinet (4), secondary treating cabinet (5) purge about 30 minutes to the analyzing and testing system, and then drops into aforementioned check and analysis step.
The pick-up unit that is used for inflammable gas calorific value composition on-line analysis method, comprise mixed gas stopple coupon (1), pipeline (2), it is that the pipeline (2) behind mixed gas stopple coupon (1) upward connects cooling cabinet (3), connect pre-service cabinet (4), secondary treating cabinet (5) and combined type analysis of components cabinet (6) in cooling cabinet (3) back successively by pipeline (2), go up by lead (7) connection computing machine (8) at secondary treating cabinet (5), upward connect host computer (10) by netting twine (9) at combined type analysis of components cabinet (6).
The mixed gas sample gas of gathering for making is representative, it is that it is that radially three sampling spots of semicircle are installed that mixed gas stopple coupon (1) is gone up at mixed gas pipeline (11), it is the radius of mixed gas pipeline (11) that mixed gas stopple coupon (1) inserts the darkest in the mixed gas pipeline (11), and all the other two sampling spot insertion depths are respectively 1/3 and 2/3 place of caliber.
It is to be welded with successively water inlet pipe (12), drainpipe (13), compressed air hose (14) on cooling cabinet (3).Water and pressure gas are taken their own roads in cooling cabinet (3).
For the impurity that makes deposition in time purges, operate as normal with assurance device, it is to be connected with nitrogen tube (15) respectively on pre-service cabinet (4), secondary treating cabinet (5) and combined type analysis of components cabinet (6), and steam pipe (16) is connected on the pre-service cabinet (4).
It is that difference installed filters (17,18) is multilayer tandem stainless steel screen pack in cooling cabinet (3), the pre-service cabinet (4).Filtrator (19) in the secondary treating cabinet (5) is for the porcelain filter of mesh≤0.5 μ and remove the filtrator that the wet type screen pack combines.
It is to be equipped with in the cooling cabinet (3) air cooling device (25).
The foundation of mixed gas calorific value composition on-line analysis method: CO, CO in the mixed gas
2, CH
4, H
2, O
2, the CmHn calorific value is contained various composition gas heating value sum, as long as detect CO, CO
2, CH
4, H
2, O
2, each gas ingredients of CmHn volume content, and in the calorific value table, find the calorific value of each corresponding composition gas, utilize
The calorific value meter Calculate formulaObtain CO, CO
2, CH
4, H
2, O
2, CmHn calorific value separately, addition subsequently is the calorific value of mixed gas.
Principle of work: go up by stopple coupon (1) taking-up mixed gas sample gas from mixed gas pipeline (11), mixed gas sample gas enters cooling cabinet (3) by pipeline (2), via below the water quench to 15 in the cooling cabinet (3) ℃ and tentatively remove impurity such as dust contained in the sample gas, tar, naphthalene, the water that contains impurity such as dust, tar, naphthalene is constantly discharged by drainpipe (13).Through the preliminary mixed gas sample gas of removing impurity by pipeline (2) enter pre-service cabinet (3) further absorb water,
Prisoner's naphthalene, enter secondary treating cabinet (5) then and filter suction once more
Prisoner's dehumidifying, make impurity particle granularity in the mixed gas sample gas less than 0.5 μ.After deliver to again and enter infrared ray instrument (20,21), thermal conductance instrument (22) and magnetic pressure instrument (23) respectively after combined type analysis of components cabinet (6) condensation process all gases composition is carried out analyzing and testing.Measured CO, CO
2, CH
4, H
2, O
2, CmHn all gases composition volume content convert electric signal to, import computing machine (8) again by lead (7), machine (6) calculates behind the calorific value in real time and shows or print as calculated, is sent to host computer (10) by netting twine (9) simultaneously.Work after a week, because the impurity deposition to the qualification degree, is enabled nitrogen tube (15), steam pipe (16) purges.
Claims (13)
1, inflammable gas calorific value composition on-line analysis method comprises and gathers sample gas, and its characterization step also is:
(1) the sample gas that on-line continuous is collected is cooled to below 15 ℃;
(2) will carry out pre-service through the impurity in the cooled sample gas;
(3) impurity in the sample gas is carried out secondary treating, the impurity particle granularity in the sample gas after secondary treating≤0.5 μ;
(4) volume content to composition gas in the sample gas carries out analyzing and testing;
(5) sample gas converts electric signal to through instrument, and carries out the calculating of each composition calorific value by the calculation of thermodynamics formula that is input to computing machine.
2, inflammable gas calorific value composition on-line analysis method according to claim 1 is characterized in that chilled water is continuous blow-down.
3, inflammable gas calorific value composition on-line analysis method according to claim 1 is characterized in that the sample gas after secondary treating adopts parallel detection.
4, inflammable gas calorific value composition on-line analysis method according to claim 1 is characterized in that all will purging when the impurity in the sample gas being carried out pre-service, secondary treating and each composition gas analysis.
5, the pick-up unit that is used for inflammable gas calorific value composition on-line analysis method, comprise stopple coupon (1), pipeline (2), it is characterized in that the pipeline (2) behind stopple coupon (1) upward connects cooling cabinet (3), connect pre-service cabinet (4), secondary treating cabinet (5) and combined type analysis of components cabinet (6) in cooling cabinet (3) back successively by pipeline (2), go up by lead (7) connection computing machine (8) at secondary treating cabinet (5), upward connect host computer (10) by netting twine (9) at combined type analysis of components cabinet (6).
6, the pick-up unit of inflammable gas calorific value composition on-line analysis method according to claim 5, it is characterized in that it is that at least three sampling spots of circular radial arc are installed that stopple coupon (1) is gone up at inflammable gas pipeline (11), it is the radius of inflammable gas pipeline (11) that stopple coupon (1) inserts the darkest in the inflammable gas pipeline (11), and all the other insertion depths are all less than radius.
7, the pick-up unit of inflammable gas calorific value composition on-line analysis method according to claim 5, it is characterized in that being connected with water inlet pipe (12), drainpipe (13), compressed air hose (14) on cooling cabinet (3), water and pressure gas are taken their own roads in cooling cabinet (3).
8, the pick-up unit of inflammable gas calorific value composition on-line analysis method according to claim 5, it is characterized in that being connected with nitrogen tube (15) respectively on pre-service cabinet (4), secondary treating cabinet (5) and combined type analysis of components cabinet (6), steam pipe (16) is connected on the pre-service cabinet (4).
9, the pick-up unit of inflammable gas calorific value composition on-line analysis method according to claim 5 is characterized in that being separately installed with filtrator (17,18,19) in cooling cabinet (3), pre-service cabinet (4) and secondary treating cabinet (5).
10, the pick-up unit of inflammable gas calorific value composition on-line analysis method according to claim 5 is characterized in that infrared ray instrument (20,21), thermal conductance instrument (22) and the magnetic pressure instrument (23) of installing are parallel connection in combined type analysis of components cabinet (6).
11, according to the pick-up unit of claim 5 or 7 described inflammable gas calorific value composition on-line analysis methods, it is characterized in that on water inlet pipe (12), being equipped with voltage stabilizer (24).
12, the pick-up unit of inflammable gas calorific value composition on-line analysis method according to claim 5, it is characterized in that in the cooling cabinet (3), pre-service cabinet (4) that installed filters (17,18) is multilayer tandem screen pack respectively, the filtrator (19) that combines for the porcelain filter of mesh≤0.5 μ with except that the wet type screen pack in the secondary treating cabinet (5).
13, the pick-up unit of inflammable gas calorific value composition on-line analysis method according to claim 5 is characterized in that being equipped with in the cooling cabinet (3) cooling-water machine or air cooling device (25).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310111380 CN1238722C (en) | 2003-11-14 | 2003-11-14 | Combustible gas calorific value on-line analysis method and detecting device thereof |
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|---|---|---|---|
| CN 200310111380 CN1238722C (en) | 2003-11-14 | 2003-11-14 | Combustible gas calorific value on-line analysis method and detecting device thereof |
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| Publication Number | Publication Date |
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| CN1544949A true CN1544949A (en) | 2004-11-10 |
| CN1238722C CN1238722C (en) | 2006-01-25 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269695A (en) * | 2011-08-30 | 2011-12-07 | 武汉米字科技有限公司 | Method and device for measuring calorific value of mixed gas |
| WO2013091399A1 (en) * | 2011-12-22 | 2013-06-27 | 武汉四方光电科技有限公司 | Coal gas component and calorific value measurement method |
| CN103335818A (en) * | 2013-07-01 | 2013-10-02 | 中国科学院长春光学精密机械与物理研究所 | General test device for focusing and bias current regulation component of space camera |
| CN105807027A (en) * | 2016-03-16 | 2016-07-27 | 新奥科技发展有限公司 | Gas energy metering method and device |
| CN107636451A (en) * | 2015-06-11 | 2018-01-26 | 理研计器株式会社 | Calorimetry Device And Calorimetry Method |
| CN109059570A (en) * | 2018-08-01 | 2018-12-21 | 湖北新冶钢特种钢管有限公司 | For using the energy-saving control system and method for the heating furnace of mixed gas |
| CN110031593A (en) * | 2019-05-09 | 2019-07-19 | 鞍山翰玛传感技术有限公司 | A kind of calorific value of gas detection device based on gas content detection |
| CN111948168A (en) * | 2020-07-17 | 2020-11-17 | 中国神华煤制油化工有限公司 | Measuring system |
-
2003
- 2003-11-14 CN CN 200310111380 patent/CN1238722C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269695A (en) * | 2011-08-30 | 2011-12-07 | 武汉米字科技有限公司 | Method and device for measuring calorific value of mixed gas |
| CN102269695B (en) * | 2011-08-30 | 2014-04-09 | 武汉米字科技有限公司 | Method and device for measuring calorific value of mixed gas |
| WO2013091399A1 (en) * | 2011-12-22 | 2013-06-27 | 武汉四方光电科技有限公司 | Coal gas component and calorific value measurement method |
| CN103335818A (en) * | 2013-07-01 | 2013-10-02 | 中国科学院长春光学精密机械与物理研究所 | General test device for focusing and bias current regulation component of space camera |
| CN103335818B (en) * | 2013-07-01 | 2016-04-27 | 中国科学院长春光学精密机械与物理研究所 | A kind of camera space focusing bias current adjusting assembly general purpose test equipment |
| CN107636451A (en) * | 2015-06-11 | 2018-01-26 | 理研计器株式会社 | Calorimetry Device And Calorimetry Method |
| CN107636451B (en) * | 2015-06-11 | 2019-11-26 | 理研计器株式会社 | Calorimetry device and calorimetry method |
| CN105807027A (en) * | 2016-03-16 | 2016-07-27 | 新奥科技发展有限公司 | Gas energy metering method and device |
| CN109059570A (en) * | 2018-08-01 | 2018-12-21 | 湖北新冶钢特种钢管有限公司 | For using the energy-saving control system and method for the heating furnace of mixed gas |
| CN110031593A (en) * | 2019-05-09 | 2019-07-19 | 鞍山翰玛传感技术有限公司 | A kind of calorific value of gas detection device based on gas content detection |
| CN111948168A (en) * | 2020-07-17 | 2020-11-17 | 中国神华煤制油化工有限公司 | Measuring system |
| CN111948168B (en) * | 2020-07-17 | 2023-09-08 | 中国神华煤制油化工有限公司 | Measuring system |
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| Publication number | Publication date |
|---|---|
| CN1238722C (en) | 2006-01-25 |
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