CN201173877Y - Ethylene cracking gas on-line analysis sampling device - Google Patents
Ethylene cracking gas on-line analysis sampling device Download PDFInfo
- Publication number
- CN201173877Y CN201173877Y CNU200820079629XU CN200820079629U CN201173877Y CN 201173877 Y CN201173877 Y CN 201173877Y CN U200820079629X U CNU200820079629X U CN U200820079629XU CN 200820079629 U CN200820079629 U CN 200820079629U CN 201173877 Y CN201173877 Y CN 201173877Y
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- Prior art keywords
- gas
- valve
- sample
- filtrator
- analysis
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- Expired - Lifetime
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- 238000004458 analytical method Methods 0.000 title claims abstract description 30
- 238000005070 sampling Methods 0.000 title claims abstract description 23
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 238000005336 cracking Methods 0.000 title claims description 13
- 239000005977 Ethylene Substances 0.000 title abstract description 3
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 230000003139 buffering effect Effects 0.000 claims abstract description 16
- 238000000197 pyrolysis Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 12
- 239000002274 desiccant Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000011269 tar Substances 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000000631 analytical pyrolysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to an ethylene pyrolysis gas on-line analysis sampling device, the sample valve is the ball-type stop valve, the entrance point is in the heat exchanger exit of being connected through filter and pyrolysis furnace, the cylinder valves is connected to the sample valve exit end, the cylinder valves is connected with stop signal interlock system, the exit end of cylinder valves and the cooler entrance point that has temperature controller, the cooler exit end and gas-liquid buffering shielded cell entrance point are connected, the temperature controller and the DCS control system of cooler are connected, the exit end and the filter between the analysis of gas-liquid buffering shielded cell are connected, the filter is connected with the analysis appearance, the felt is equipped with in the filter, wire mesh and drier, gas-liquid buffering shielded cell bottom is connected with the discharge valve, impurity in the sample gas obtains maximum settlement and flows back in main line or the buffering shielded cell, guarantee that the sample gas that gets into in the analysis appearance is clean, And the method is continuous, so that the analysis result is more accurate.
Description
Technical field
The utility model relates to a kind of ethene cracking gas on-line analysis sampling equipment.
Background technology
MAXUM-II type gas chromatographicanalyzer principle with Siemens production is a foundation, and the character in conjunction with ethene cracking gas is described below background technology:
The brief introduction of cracking of ethylene technological process
Rock gas enters after the ethane cracking furnace, through high temperature heating carrying out cracking, produces pyrolysis gas.Contain H in the pyrolysis gas
2, CH
4, C
2H
4, C
3H
6, C
3H
8Deng composition, also contain rock gas, water vapour, coke powder, tar and other small amount of impurities of not cleaved conversion simultaneously.After the cracking product came out from pyrolysis furnace, temperature was up to 400 ℃, went into heat interchanger through filter is laggard, was sent after temperature is dropped to 200 ℃.
The analytical sampling SYSTEM SUMMARY
In order to grasp pyrolysis gas composition situation and conversion of natural gas situation, need pyrolysis gas is carried out to a part analysis.Hydrogen in the analytical pyrolysis gas, methane, ethene, the third rare content.The ratio Analysis of the ratio (P/M) of third rare and the methane or third rare and the ethene (P/E) is as cracking severity.These compositions adopt the MAXUM-II type gas chromatographicanalyzer of Siemens production to carry out on-line analysis.Because the cracking product temperature is up to 400 ℃, and contain other impurity such as water vapour, tar, coke powder, so product can not directly enter chromatograph analysis, need a cover sampling equipment to carry out a series of processing, make sample gas meet the requirements of temperature and clean level.Make the analysis result of analyser more accurate.
Sampling equipment is made up of sample valve 8, refrigeratory 4 and filtrator 2.The sample position is in pyrolysis furnace 5 exits, and sample gas is behind sampling cooler, and temperature is dropped to 17 ℃.Refrigeratory 4 has a sleeving temperature control system, and regulator is air operated controller on the spot.In the filtrator 2 between analysis in 3 felt, wire gauze and drying agent are housed, filtrator 2 is connected with analyser 1 sees Fig. 1.
The problem that background technology exists
(1) the sampling stop valve is a pin type stop valve, is often stopped up by coke powder and tar, influences sample gas and passes through, and makes the analytic system can't operate as normal.
(2) sample valve is in open mode during ordinary production, pyrolysis furnace at coke cleaning, stop suddenly or when just having driven, coke powder and improper production product enter sample line, the normal specimens analysis of impact analysis instrument.
(3) filter often is filled with liquid between the analysis, has a strong impact on filter effect.
(4) air operated controller failure rate height, maintenance difficult, control effect are bad on the spot.
(5) the sample gas that enters analyser still contains a small amount of tar and water vapour, and sample gas impurity sedimentation and filtering effect is bad.
The utility model content
The purpose of this utility model is the cylinder valve that changes the sampling line position and increase a cover and stop sign interlocking behind sample valve, and the sample gas that guarantees to enter chromatograph is continuous, clean, makes the analyser analysis result more accurate.
Analytical sampling equipment described in the utility model is by sample valve, refrigeratory, filtrator, cylinder valve group and gas-liquid buffer compartment are formed from jar, sample valve is a spheroidal stop valve, entrance point is connected the heat exchanger exit place that is connected with pyrolysis furnace by filtrator, the sample valve endpiece connects the cylinder valve group, the cylinder valve group is connected with the stop sign interlocking system, the endpiece of cylinder valve group is connected with the cooler inlet end that has temperature controller, the cooler outlet end is connected with gas-liquid buffering sealing chamber entrance point, the temperature controller of refrigeratory is connected with the DCS control system, the endpiece of gas-liquid buffering sealing chamber is connected with the filtrator between analyzing, filtrator is connected with analyser, felt is housed in the filtrator, wire gauze and drying agent, the gas-liquid buffer compartment is connected with bleed valve from pot bottom.
The sampling equipment specification:
(1) sample position is changed into after the heat interchanger, sample valve changes spheroidal stop valve into by original needle valve.From the product temperature height that pyrolysis furnace comes out, coke powder, tar, water vapour and other impurity are many, add that again the needle valve circulation area is little, and sample valve is easily stopped up by these compositions.And when sample valve stops up, since the continuity of producing, block clearing in time.Thereby coming into operation of impact analysis instrument.Change into after the spherical valve, circulation area increases, and makes sample valve be difficult for being blocked.Product is through behind filter for molten and the heat interchanger, has impurity such as quite a few tar to be settled down.Sample valve is changed into the obstruction that has slowed down valve herein.In addition, product is dropped to 200 ℃ through temperature after the heat interchanger. and behind heat interchanger, take a sample, make sampling system further lower the temperature to become and be more prone to sample.
(2) behind sample valve, add a cover cylinder valve, this valve and stop sign interlocking.
Because sample valve is a hand switch, between non-turn(a)round, sample valve is in open mode always at device.Pyrolysis furnace at coke cleaning, stop suddenly or when just having driven, coke powder and improper production product enter sample line, the normal specimens analysis of impact analysis instrument.In order to prevent that improper product from entering analyser, when stopping, timely shifter cylinder valve.Simultaneously, the cylinder valve Time Delay Opening is 10 minutes when driving, when treating that device is produced qualified samples in the detection of taking a sample.
(3) the sample gas through subcooler is changed into 6 ℃ by 17 ℃.
Through groping for a long time and test, sample gas is in the time of 6 ℃, and the effect of tar, coke powder and water vapour sedimentation is best, contain assorted minimum, the most close actual value of analyser analysis result.Therefore, 17 ℃ of traditional sample gas are changed into 6 ℃.This is to realize by the desired temperature that changes the chiller temperature controller.Because adjustment is to realize on DCS, so it is to set on DCS that setting is worth.
(4) install a gas-liquid buffering sealing chamber outside between analyzing additional.
Sample gas is after the sampling cooling heat exchanger, impurity major parts such as the tar that settles down, coke powder, water vapour are back to Trunk Line, in also some impurity flows to filtrator between analysis along sampling line, filtrator in making between analysis often is filled with water liquid and tar etc., had a strong impact on sampling, add buffer compartment behind jar outside between analyzing, liquid composition that these settle down and impurity flow into buffer compartment from jar, and it plays the effect of receiving flask.Bleed valve below the buffering sealing chamber regularly discharges then, makes filtrator interior between analysis be difficult for being filled with liquid.
(5) air operated controller is cancelled, temperature detection signal is introduced DCS, carry out adjustment control by DCS.
Air operated controller failure rate height originally, precision is low, and maintenance capacity is big.Change into after the DCS of the automatic control chamber control, reduced failure rate, improved control accuracy.
After new sampling system comes into operation, the water vapour in the sample gas, tar, coke powder and other impurity obtain maximum sedimentation and be back to Trunk Line or the buffering sealing chamber in.It can guarantee to enter sample gas cleaning in the analyser, continuously, makes analysis result more accurate.
Description of drawings
Fig. 1 has analyzer sample apparatus and process pipeline connection layout now.
The process pipeline connection layout of Fig. 2 ethene cracking gas on-line analysis sampling equipment.
Wherein 1, analyser 2, filtrator 3, analyze between 4, refrigeratory 5, pyrolysis furnace 6, filtrator 7, heat interchanger 8, sample valve 9, cylinder valve group 10, stop sign interlocking system 11, gas-liquid buffering sealing chamber.
Embodiment:
With reference to the accompanying drawings ethene cracking gas on-line analysis sampling equipment described in the utility model being formed structure is described in detail.
Analytical sampling equipment described in the utility model is by sample valve 8, refrigeratory 4, filtrator 2, cylinder valve group 9 and gas-liquid buffer compartment are formed from jar 11, sample valve 8 is a spheroidal stop valve, entrance point is connected heat interchanger 7 exits that are connected with pyrolysis furnace 5 by filtrator 6, sample valve 8 endpiece connect cylinder valve 9, cylinder valve 9 is connected with stop sign interlocking system 10, the endpiece of cylinder valve group 9 is connected with refrigeratory 4 entrance points that have temperature controller, refrigeratory 4 endpiece are connected with gas-liquid buffering sealing chamber 11 entrance points, the temperature controller of refrigeratory 4 is connected with the DCS control system, 3 filtrator 2 is connected between the endpiece of gas-liquid buffering sealing chamber 11 and analysis, filtrator 2 is connected with analyser 1, in the filtrator 2 felt is housed, wire gauze and drying agent, gas-liquid buffering sealing chamber 11 bottoms are connected with bleed valve.
(1) sampling cylinder valve:
Producer: Tingyu Group Co.,Ltd
Model: MAQIF6T8F
Nominal diameter: 15mm
(2) gas-liquid buffering sealing chamber:
Size: ф 100 * 200
Material: 316L
The sampling system mounting means
Pipeline between from the sample valve to the refrigeratory and equipment adopt vertical the installation, so that impurity is back in the Trunk Line.
Setting value
Chiller temperature adjuster settings: 6 ℃.
Claims (1)
1. ethene cracking gas on-line analysis sampling equipment, by sample valve, refrigeratory, filtrator, cylinder valve group and gas-liquid buffer compartment are formed from jar, it is characterized in that: sample valve is a spheroidal stop valve, entrance point is connected the heat exchanger exit place that is connected with pyrolysis furnace by filtrator, the sample valve endpiece connects the cylinder valve group, the cylinder valve group is connected with the stop sign interlocking system, the endpiece of cylinder valve group is connected with the cooler inlet end that has temperature controller, the cooler outlet end is connected with gas-liquid buffering sealing chamber entrance point, the temperature controller of refrigeratory is connected with the DCS control system, the endpiece of gas-liquid buffering sealing chamber is connected with the filtrator between analyzing, filtrator is connected with analyser, felt is housed in the filtrator, wire gauze and drying agent, the gas-liquid buffer compartment is connected with bleed valve from pot bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820079629XU CN201173877Y (en) | 2008-03-28 | 2008-03-28 | Ethylene cracking gas on-line analysis sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820079629XU CN201173877Y (en) | 2008-03-28 | 2008-03-28 | Ethylene cracking gas on-line analysis sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201173877Y true CN201173877Y (en) | 2008-12-31 |
Family
ID=40201004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820079629XU Expired - Lifetime CN201173877Y (en) | 2008-03-28 | 2008-03-28 | Ethylene cracking gas on-line analysis sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201173877Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288706A (en) * | 2010-06-18 | 2011-12-21 | 中国石油化工股份有限公司 | On-line pretreatment device for sample gas of ethylene cracking furnace and installing method thereof |
| CN102288512A (en) * | 2010-06-18 | 2011-12-21 | 中国石油化工股份有限公司 | Method for calibrating yield of cracked product of cracking furnace in ethylene device |
| CN102288508A (en) * | 2010-06-18 | 2011-12-21 | 中国石油化工股份有限公司 | Method for implementing analysis of cracking depth of industrial cracking furnace |
| CN102749403A (en) * | 2011-04-20 | 2012-10-24 | 中国石油化工股份有限公司 | Special sampling device for online chromatographic analysis system |
| CN103091426A (en) * | 2011-11-04 | 2013-05-08 | 中国石油化工股份有限公司 | On-line pretreatment device of chromatographic gas sample and application method thereof |
| CN103091427A (en) * | 2011-11-04 | 2013-05-08 | 中国石油化工股份有限公司 | Online pretreatment device of chromatography gas sample and use method thereof |
| CN103091428A (en) * | 2011-11-04 | 2013-05-08 | 中国石油化工股份有限公司 | Online pretreatment device of chromatography gas sample and use method thereof |
| CN108254240A (en) * | 2017-12-29 | 2018-07-06 | 重庆弛源化工有限公司 | For the mechanical magnetic oxygen table pretreatment system of cracking gas oxygen content on-line checking |
| CN108931585A (en) * | 2017-05-25 | 2018-12-04 | 中国石油化工股份有限公司 | Carbon impurity on-line monitoring method in a kind of liquefaction hydrocarbon raw material |
-
2008
- 2008-03-28 CN CNU200820079629XU patent/CN201173877Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288706A (en) * | 2010-06-18 | 2011-12-21 | 中国石油化工股份有限公司 | On-line pretreatment device for sample gas of ethylene cracking furnace and installing method thereof |
| CN102288512A (en) * | 2010-06-18 | 2011-12-21 | 中国石油化工股份有限公司 | Method for calibrating yield of cracked product of cracking furnace in ethylene device |
| CN102288508A (en) * | 2010-06-18 | 2011-12-21 | 中国石油化工股份有限公司 | Method for implementing analysis of cracking depth of industrial cracking furnace |
| CN102288706B (en) * | 2010-06-18 | 2014-05-28 | 中国石油化工股份有限公司 | On-line pretreatment device for sample gas of ethylene cracking furnace and installing method thereof |
| CN102749403A (en) * | 2011-04-20 | 2012-10-24 | 中国石油化工股份有限公司 | Special sampling device for online chromatographic analysis system |
| CN102749403B (en) * | 2011-04-20 | 2015-11-25 | 中国石油化工股份有限公司 | The special sampling apparatus of on-line chromatograph analytic system |
| CN103091428A (en) * | 2011-11-04 | 2013-05-08 | 中国石油化工股份有限公司 | Online pretreatment device of chromatography gas sample and use method thereof |
| CN103091427A (en) * | 2011-11-04 | 2013-05-08 | 中国石油化工股份有限公司 | Online pretreatment device of chromatography gas sample and use method thereof |
| CN103091428B (en) * | 2011-11-04 | 2014-08-27 | 中国石油化工股份有限公司 | Online pretreatment device of chromatography gas sample and use method thereof |
| CN103091426B (en) * | 2011-11-04 | 2014-11-05 | 中国石油化工股份有限公司 | On-line pretreatment device of chromatographic gas sample and application method thereof |
| CN103091427B (en) * | 2011-11-04 | 2015-06-17 | 中国石油化工股份有限公司 | Online pretreatment device of chromatography gas sample and use method thereof |
| CN103091426A (en) * | 2011-11-04 | 2013-05-08 | 中国石油化工股份有限公司 | On-line pretreatment device of chromatographic gas sample and application method thereof |
| CN108931585A (en) * | 2017-05-25 | 2018-12-04 | 中国石油化工股份有限公司 | Carbon impurity on-line monitoring method in a kind of liquefaction hydrocarbon raw material |
| CN108254240A (en) * | 2017-12-29 | 2018-07-06 | 重庆弛源化工有限公司 | For the mechanical magnetic oxygen table pretreatment system of cracking gas oxygen content on-line checking |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081231 |