CN202661450U - Detection device for dimethyl ether in liquefied petroleum gas - Google Patents
Detection device for dimethyl ether in liquefied petroleum gas Download PDFInfo
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- CN202661450U CN202661450U CN 201220213225 CN201220213225U CN202661450U CN 202661450 U CN202661450 U CN 202661450U CN 201220213225 CN201220213225 CN 201220213225 CN 201220213225 U CN201220213225 U CN 201220213225U CN 202661450 U CN202661450 U CN 202661450U
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Abstract
The utility model discloses a detection device for dimethyl ether in liquefied petroleum gas and belongs to technologies of liquefied petroleum gas detection devices. The device comprises a gas source device, a water bath kettle and a chromatographic analyzer, wherein a gas outlet end of the gas source is communicated with a gas inlet end of the water bath kettle, a heat exchange pipe is arranged inside the water bath kettle, a gas inlet end of the heat exchange pipe is communicated with the gas inlet end of the water bath kettle, a gas outlet end of the heat exchange pipe is communicated with a gas outlet end of the water bath kettle, the chromatographic analyzer is communicated with the gas outlet end of the water bath kettle through a connecting pipe, and the water bath kettle can be an explosion-proof type thermostat water bath kettle; and the chromatographic analyzer can be a packed column type chromatographic analyzer, the diameter of a chromatographic column of the chromatographic analyzer can be 3-5mm, and the length of the column can be 8-10m. The liquefied petroleum gas which is output by the gas source device is heated and vaporized by the water bath kettle, the gas is fed into the chromatographic analyzer for detection, the concentration and the data of the dimethyl ether can be obtained conveniently, and the detection device has the advantages of being safe, reliable and high in detection accuracy.
Description
Technical field
The utility model relates to liquefied petroleum gas (LPG) checkout equipment technical field, particularly relates to dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG).
Background technology
Liquefied petroleum gas (LPG) (English name liquefied petroleum gas; Abbreviation LPG) is widely used in the use that acts as a fuel in production and the life, mainly be the light hydrocarbons of liquid condition that can congeal under the condition that is gaseous state under normal temperature, the normal pressure, is pressurizeing and lowers the temperature in refinery gas, the rock gas, its principal ingredient is propane and butane.Liquefied petroleum gas (LPG) is refinery resulting secondary product when carrying out crude oil catalytic pyrolysis and thermal cracking.The Main Ingredients and Appearance of catalytically cracked gas following (%): ethene 3. propane 16～20. propylene 6～11. butane 42～46. butylene 5～6 of methane 10. ethane 3 of hydrogen 5～6.～5. contain the above hydro carbons 5～12 of 5 carbon atoms.The Main Ingredients and Appearance of thermal cracking gas following (%): ethene 16～18. propane 0.5. propylene 7～8. butane 0.2. butylene 4～5 of the ethane 5 of hydrogen 12. methane 5～7.～7. contain the above hydro carbons 2～3 of 5 carbon atoms.These hydrocarbons are easily liquefaction all, and they are compressed to the 1/250～l/33 that only accounts for original volume, is stored in the high voltage bearing cylinder of steel, and the valve of turning on liquid gas storage tank during use makes flammable hydrocarbon gas enter burner by pipeline.Light the light blue flame of rear formation, produce large calorimetric in the combustion process.And can adjust firepower as required, use convenient and sanitary.Although liquefied petroleum gas (LPG) is easy to use, unsafe hidden danger is arranged also.Just in case pipeline gas leakage or unclosed valve are tight, liquefied petroleum gas (LPG) is to indoor diffusion, and when content reached explosion limits (1.7%～10%), running into Mars or electric spark will blast.In order to remind people to find in time whether liquefied gas leaks, mercaptan or the thio-ether type compounds that a small amount of foul smelling is distinguished the flavor of often sneaked into by processing factory in liquefied gas.In case gas leak is arranged, takes emergency measures thereby smell immediately this smell.
Dimethyl ether claims again methyl ether, is called for short DME.Dimethyl ether is a kind of colourless gas or compressed liquid at normal temperatures and pressures, has slight ether fragrance.Relative density (20 ℃) 0.666, fusing point-141.5 ℃, boiling point-24.9 ℃, vapor pressure is about 0.5MPa under the room temperature, and (LPG) is similar to oil liquefied gas.The multiple organic solvents such as water-soluble and pure, ether, acetone, chloroform.Inflammable, flame is slightly bright when burning, and heating power (gaseous state) is 1455kJ/mol.DME has inertia under the normal temperature, is difficult for autoxidation, without the burn into non-carcinogenesis, but can resolve into methane, ethane, formaldehyde etc. under radiation or heating condition.Form explosive mixture with the air mixing energy.Contact heat, Mars, flame or the blast of oxygenant easy firing.Ingress of air or under illumination condition, can generate the superoxide with potential explosion hazard.Gas is heavier than air, and can be diffused in the lower place quite far away, and the chance burning things which may cause a fire disaster can catch fire and strile-back.If meet high heat, press in the container to increase, the danger of cracking and blast is arranged.
Dimethyl ether comes into one's own in people life as a kind of new-type energy, and the characteristics such as have low toxicity, the burning oxygen demand is few, and products of combustion is pollution-free mix to can be used as the domestic fuel use with liquefied petroleum gas (LPG).But, if dimethyl ether than great, heat is little is filled in the liquefied petroleum gas (LPG), can reduce the heat of liquefied petroleum gas (LPG), what fill is more, thermal value will be lower; In addition because dimethyl ether has emollescence to nitrile rubber, the O-ring seal of liquefied petroleum gas steel cylinder and outbox is had corrosivity and causes damage, thereby cause the potential safety hazard of liquefied petroleum gas (LPG).National departments concerned does not allow to add in the liquefied petroleum gas (LPG) dimethyl ether to this existing explicit stipulation.Yet dimethyl ether and liquefied petroleum gas (LPG) degree of mixing are higher, make the complete separating difficulty of each component large, thus so that the detection of dimethyl ether content in the liquefied petroleum gas (LPG) is lacked corresponding preferably technical scheme.
Therefore, for problems of the prior art, needing badly provides in a kind of safe and reliable and effective liquefied petroleum gas (LPG) the dimethyl ether detection technique particularly important.
Summary of the invention
The purpose of this utility model is to avoid weak point of the prior art and dimethyl ether pick-up unit in a kind of safe and reliable, liquefied petroleum gas (LPG) that accuracy of detection is high is provided.
The purpose of this utility model is achieved through the following technical solutions:
Dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG) is provided, wherein: comprise being provided with compressed air source unit, water-bath and chromatograph, the outlet side of described compressed air source unit is communicated with the inlet end of described water-bath, described water-bath is built-in with heat-exchange tube, the inlet end of described heat-exchange tube is communicated to the inlet end of described water-bath, the outlet side of described heat-exchange tube is communicated to the outlet side of described water-bath, and described chromatograph is communicated with the outlet side of described water-bath by connecting pipe.
Wherein, described water-bath is set to the protected against explosion thermostat water bath.
Wherein, described chromatograph is set to fill the pillar chromatograph, and the diameter of the chromatographic column of described chromatograph is set to 3～5mm, and column length is set to 8～10m.
Wherein, described heat-exchange tube is set to the stainless steel capillary dish and becomes discoid heat-exchange tube.
Wherein, described connecting pipe is set to the connecting pipe of flexible pipe and/or stainless-steel tube.
Wherein, described connecting pipe is set to 3～20m.
Generally, described connecting pipe can be set to 5～10m.
Wherein, be provided be used to the flowmeter that measures sample tolerance between described water-bath and the described chromatograph, the inlet end of described flowmeter is communicated with the outlet side of described water-bath, and the outlet side of described flowmeter is communicated with described chromatograph.
Wherein, described flowmeter is arranged at the outlet side of described water-bath, and the inlet end of described flowmeter is communicated with the outlet side of described water-bath, and the outlet side of described flowmeter is communicated with the inlet end of described chromatograph by described connecting pipe.
Wherein, be provided with variable valve between described water-bath and the described flowmeter, the inlet end of described variable valve is communicated with the outlet side of described water-bath, the outlet side of described variable valve is communicated with the inlet end of described flowmeter, be provided with six-way valve between described flowmeter and the described chromatograph, the inlet end of described six-way valve is communicated with the outlet side of described flowmeter, and the outlet side of described six-way valve is communicated with the inlet end of described chromatograph.
The beneficial effects of the utility model:
Dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG) of the present utility model, comprise and be provided with compressed air source unit, water-bath and chromatograph, the outlet side of compressed air source unit is communicated with the inlet end of water-bath, water-bath is built-in with heat-exchange tube, the inlet end of heat-exchange tube is communicated to the inlet end of water-bath, the outlet side of heat-exchange tube is communicated to the outlet side of water-bath, and chromatograph is communicated with the outlet side of water-bath by connecting pipe.By the liquefied petroleum gas (LPG) heating vaporization of water-bath with compressed air source unit output, be conveyed in the chromatograph through connecting pipe and detect, can draw easily concentration and the data of dimethyl ether, have safe and reliable, the characteristics that accuracy of detection is high.
Description of drawings
The utility model is described in further detail to utilize accompanying drawing, but the embodiment in the accompanying drawing does not consist of any restriction of the present utility model.
Fig. 1 is the structural representation of dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG) of the present utility model.
In Fig. 1, include:
1---compressed air source unit, 2---water-bath, 3---chromatograph, 4---connecting pipe, 5---flowmeter.
Embodiment
Below in conjunction with embodiment the utility model is elaborated.
Embodiment 1
The embodiment 1 of dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG) of the present utility model, as shown in Figure 1, comprise and be provided with compressed air source unit 1, water-bath 2 and chromatograph 3, the outlet side of compressed air source unit 1 is communicated with the inlet end of water-bath 2, water-bath 2 is built-in with heat-exchange tube, the inlet end of heat-exchange tube is communicated to the inlet end of water-bath 2, and the outlet side of heat-exchange tube is communicated to the outlet side of described water-bath 2, and chromatograph 3 is communicated with the outlet side of water-bath 2 by connecting pipe 4.
By the liquefied petroleum gas (LPG) heating vaporization of water-bath 2 with compressed air source unit 1 output, process connecting pipe 4 is conveyed in the chromatograph 3 and detects, can draw easily concentration and the data of dimethyl ether, so that safe and reliable to the detection of dimethyl ether, accuracy of detection is high thus.
Concrete, connecting pipe 4 can be set to the connecting pipe of flexible pipe and/or stainless-steel tube.Flexible pipe can be easily in experiment sensing chamber or other detect places and use, because its bendability is better, can be applied widely, the especially narrower sensing chamber of some areas, and flexible pipe compares the higher pipe of hardness and has advantages of that breakage-proof is good, security is higher.
Concrete, water-bath 2 is set to protected against explosion thermostat water bath 2.In the narrow space of laboratory, liquefied petroleum gas (LPG) output is vaporized through water-bath 2, easily causes potential safety hazard, and the water-bath 2 with blast resistance construction can make testing process safer.
Concrete, also can be at the indoor connecting pipe 4 that lays stainless-steel tube.The connecting pipe 4 that stainless steel is made has corrosion resistant characteristics, avoids common polyester connecting pipe 4 easily being caused corrosion and damage, thereby affecting the security of testing process because containing more impurity in the liquefied petroleum gas (LPG).
Perhaps pipeline section is connected flexible pipe is set between the indoor mouth of pipe place of laying stainless-steel tube and checkout equipment, forms mixed pipe line.
Concrete, connecting pipe can be set to 3～20m.Generally, connecting pipe can be set to 5～10m.
The embodiment 2 of dimethyl ether pick-up unit is with the difference of embodiment 1 in a kind of liquefied petroleum gas (LPG) of the present utility model: water-bath 2 built-in heat-exchange tubes can be set to the stainless steel capillary dish and become discoid heat-exchange tube.
The difference of the embodiment 3 of dimethyl ether pick-up unit and embodiment 1 is in a kind of liquefied petroleum gas (LPG) of the present utility model: be provided with between water-bath 2 and the chromatograph 3 be used to the flowmeter 5 that measures sample tolerance, the inlet end of flowmeter 5 is communicated with the outlet side of water-bath 2, and the outlet side of flowmeter 5 is communicated with the inlet end of chromatograph 5.
Concrete, flowmeter 5 can be arranged at the outlet side of water-bath 2, and the inlet end of flowmeter 5 is communicated with the outlet side of water-bath 2, and the outlet side of flowmeter 5 is passed through connecting pipe 4 and is communicated with chromatograph 3.Flowmeter 5 can calculate the data of sample introduction accurately, improves accuracy of detection.
Concrete, chromatograph 3 can be set to fill pillar chromatograph 3, and the diameter of the chromatographic column of chromatograph can also be set to 3～5mm, and column length can also be set to 8～10m.Fill pillar chromatograph 3 and can adopt area-method to detect dimethyl ether, accuracy of detection is high.
The difference of the embodiment 4 of dimethyl ether pick-up unit and embodiment 3 is in a kind of liquefied petroleum gas (LPG) of the present utility model: be provided with variable valve between water-bath 2 and the flowmeter 5, the inlet end of variable valve is communicated with the outlet side of water-bath 2, the outlet side of variable valve is communicated with the inlet end of flowmeter 5, be provided with six-way valve between flowmeter 5 and the chromatograph 3, the inlet end of six-way valve is communicated with the outlet side of flowmeter 5, and the outlet side of six-way valve is communicated with the inlet end of chromatograph 3.
Should be noted that at last; above embodiment is only in order to the technical solution of the utility model to be described but not to the restriction of the utility model protection domain; although with reference to preferred embodiment the utility model has been done detailed description; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from essence and the scope of technical solutions of the utility model.
Claims (10)
1. dimethyl ether pick-up unit in the liquefied petroleum gas (LPG), it is characterized in that: comprise being provided with compressed air source unit, water-bath and chromatograph, the outlet side of described compressed air source unit is communicated with the inlet end of described water-bath, described water-bath is built-in with heat-exchange tube, the inlet end of described heat-exchange tube is communicated to the inlet end of described water-bath, the outlet side of described heat-exchange tube is communicated to the outlet side of described water-bath, and described chromatograph is communicated with the outlet side of described water-bath by connecting pipe.
2. dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG) according to claim 1, it is characterized in that: described water-bath is set to the protected against explosion thermostat water bath.
3. dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG) according to claim 1, it is characterized in that: described chromatograph is set to fill the pillar chromatograph, the diameter of the chromatographic column of described chromatograph is set to 3～5mm, and column length is set to 8～10m.
4. dimethyl ether pick-up unit according to claim 1 and 2 or in 3 described a kind of liquefied petroleum gas (LPG), it is characterized in that: described heat-exchange tube is set to the stainless steel capillary dish and becomes discoid heat-exchange tube.
5. dimethyl ether pick-up unit according to claim 1 and 2 or in 3 described a kind of liquefied petroleum gas (LPG), it is characterized in that: described connecting pipe is set to the connecting pipe of flexible pipe and/or stainless-steel tube.
6. dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG) according to claim 5, it is characterized in that: described connecting pipe is set to 3～20m.
7. dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG) according to claim 6, it is characterized in that: described connecting pipe is set to 5～10m.
8. dimethyl ether pick-up unit according to claim 1 and 2 or in 3 described a kind of liquefied petroleum gas (LPG), it is characterized in that: be provided be used to the flowmeter that measures sample tolerance between described water-bath and the described chromatograph, the inlet end of described flowmeter is communicated with the outlet side of described water-bath, and the outlet side of described flowmeter is communicated with described chromatograph.
9. dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG) according to claim 8, it is characterized in that: described flowmeter is arranged at the outlet side of described water-bath, and the inlet end of described flowmeter is communicated with the outlet side of described water-bath, and the outlet side of described flowmeter is communicated with the inlet end of described chromatograph by described connecting pipe.
10. dimethyl ether pick-up unit in a kind of liquefied petroleum gas (LPG) according to claim 9, it is characterized in that: be provided with variable valve between described water-bath and the described flowmeter, the inlet end of described variable valve is communicated with the outlet side of described water-bath, the outlet side of described variable valve is communicated with the inlet end of described flowmeter, be provided with six-way valve between described flowmeter and the described chromatograph, the inlet end of described six-way valve is communicated with the outlet side of described flowmeter, and the outlet side of described six-way valve is communicated with the inlet end of described chromatograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220213225 CN202661450U (en) | 2012-05-14 | 2012-05-14 | Detection device for dimethyl ether in liquefied petroleum gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220213225 CN202661450U (en) | 2012-05-14 | 2012-05-14 | Detection device for dimethyl ether in liquefied petroleum gas |
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| CN202661450U true CN202661450U (en) | 2013-01-09 |
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| CN 201220213225 Expired - Fee Related CN202661450U (en) | 2012-05-14 | 2012-05-14 | Detection device for dimethyl ether in liquefied petroleum gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004816A (en) * | 2015-08-12 | 2015-10-28 | 苏州优谱德精密仪器科技有限公司 | Method for rapidly detecting liquefied petroleum gas components |
| CN105021739A (en) * | 2015-08-12 | 2015-11-04 | 苏州优谱德精密仪器科技有限公司 | Simple device for liquefied petroleum gas composition detection |
| CN105092317A (en) * | 2015-08-12 | 2015-11-25 | 苏州优谱德精密仪器科技有限公司 | Method for detecting components of liquefied petroleum gas |
| CN105181827A (en) * | 2015-08-12 | 2015-12-23 | 苏州优谱德精密仪器科技有限公司 | Simple method for detection of liquefied petroleum gas components |
| CN105911185A (en) * | 2016-04-20 | 2016-08-31 | 徐州市产品质量监督检验中心 | Method for detecting the contents of dimethyl ether and various hydrocarbon components in liquefied petroleum gas |
-
2012
- 2012-05-14 CN CN 201220213225 patent/CN202661450U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004816A (en) * | 2015-08-12 | 2015-10-28 | 苏州优谱德精密仪器科技有限公司 | Method for rapidly detecting liquefied petroleum gas components |
| CN105021739A (en) * | 2015-08-12 | 2015-11-04 | 苏州优谱德精密仪器科技有限公司 | Simple device for liquefied petroleum gas composition detection |
| CN105092317A (en) * | 2015-08-12 | 2015-11-25 | 苏州优谱德精密仪器科技有限公司 | Method for detecting components of liquefied petroleum gas |
| CN105181827A (en) * | 2015-08-12 | 2015-12-23 | 苏州优谱德精密仪器科技有限公司 | Simple method for detection of liquefied petroleum gas components |
| CN105911185A (en) * | 2016-04-20 | 2016-08-31 | 徐州市产品质量监督检验中心 | Method for detecting the contents of dimethyl ether and various hydrocarbon components in liquefied petroleum gas |
| CN105911185B (en) * | 2016-04-20 | 2019-02-05 | 徐州市质量技术监督综合检验检测中心 | A kind of method of dimethyl ether and each hydrocarbon component content in detection liquefied petroleum gas |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20160514 |