CN103852351A - Sampling device and sampling method for pumping gas sample in self-negative-pressure pipeline - Google Patents
Sampling device and sampling method for pumping gas sample in self-negative-pressure pipeline Download PDFInfo
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- CN103852351A CN103852351A CN201410112473.0A CN201410112473A CN103852351A CN 103852351 A CN103852351 A CN 103852351A CN 201410112473 A CN201410112473 A CN 201410112473A CN 103852351 A CN103852351 A CN 103852351A
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Abstract
The invention relates to a sampling device and a sampling method for pumping a gas sample in a self-negative-pressure pipeline, which can be widely applied to a sampling step of checking front coal gas of draught fans of steel, coking and chemical industries. According to the sampling device, a coal gas pipeline is externally connected with a first gas conveying pipe and one end of the first gas conveying pipe is inserted into a liquid level in an absorption liquid bottle; a water injection pipe and a gas inlet pipe are arranged at the top of a sealed water tank; one end of a second gas conveying pipe is guided out from the top of the absorption liquid bottle and is connected onto the gas inlet pipe; a water discharging pipe is arranged at the bottom of the sealed water tank; the first gas conveying pipe, the second gas conveying pipe, the water injection pipe and a water discharging pipe are provided with valves respectively; a measuring cylinder with scales is arranged below the water discharging pipe. The invention introduces the sampling method based on the device. The invention explores a new way for a negative-pressure sampling manner of the coal gas so as to effectively avoid inaccurate measurement of a sampling volume and avoid mixing air. The accuracy of the negative-pressure sampling of the coal gas is guaranteed.
Description
Technical field
The invention provides a kind of gas sampling point that iron and steel, coking, chemical industry gas piping pressure are less than or equal to atmospheric pressure that is widely used in.
Background technology
At coking industry, need to sample the coal gas sample in gas piping, to detect hydrogen sulfide content in coal gas, its sampling spot is generally positioned at the position before fan blower, and gas piping pressure before fan blower is generally negative pressure (approximately negative 5KPa), present stage is most of uses negative pressure pump sampling.Negative pressure pump is extracted coal gas out by rotating, and need to coordinate gas meter to calculate the volume of the coal gas of extracting out.
In actual use, because Portable negative-pressure sampling pump pressure is less, draft is also little, make the sample flow that extracts unstable, cause objectively the gas meter always cannot accurate counting, directly affected the assay of hydrogen sulfide content in coal gas, data deviation is large, does not meet and produces reality.
Therefore need to make improvements, making can accurate-metering gas sampling volume, can check accurately the content of coal gas sulfuretted hydrogen before blower fan, provides accurate data for producing.
summary of the invention
For above-mentioned situation, the present invention invention aim to provide a kind of in negative-pressure pipeline the sampler of extracting gases sample, it can be less than or equal at gas piping pressure the gas sampling point Measurement accuracy sample volume of atmospheric pressure, and make simple and easy, easy to operate, cancel negative pressure pump, operating cost is low, is worth universal and promotes.
For achieving the above object, the method for the invention is solved by following technical scheme:
A kind of in negative-pressure pipeline the sampler of extracting gases sample, comprise gas piping, gas piping, absorption liquid bottle, sealing radiator, graduated cylinder and valve, it is characterized in that, on described gas piping, insert below the liquid level in absorption liquid bottle one end of external one first gas piping and the first gas piping, be provided with water injection pipe and draft tube at the top of described sealing radiator, one second gas piping one end self-absorption liquid bottle Base top contact is also connected in described draft tube, bottom at described sealing radiator is provided with drainpipe, and at the first gas piping, the second gas piping, in water injection pipe and drainpipe, be respectively arranged with valve, with graduated described graduated cylinder be placed on described drainpipe under.
Described water injection pipe connects water supply pipe, and is provided with an only outside retaining valve for exhaust at the top of described seal case.
In negative-pressure pipeline, a sampling method for extracting gases sample, is characterized in that, comprises the steps:
First, close the valve on first, second gas piping, make the valve at drainpipe place in closed condition simultaneously, in sealing radiator, fill water by water injection pipe;
Then, close the valve on water injection pipe, open first, valve in draft tube and open the valve on drainpipe simultaneously, when the liquid in sealing radiator stops closing when dirty the valve on drainpipe.
Complete primary sample, by the content of analyzing, metering can accurately draw the test substance containing in coal gas.
Negative-pressure gas sampler provided by the invention be specially adapted to gas in pipelines pressure be less than atmospheric pressure gas piping, the core technology of this device adopts drainage principle, and gas volume is effectively measured, and avoids sampling error.Sample more accurately than the mode of traditional use negative pressure pump sample drawn, and cost is lower, this antifouling type water seal be adapted to coal gas etc. many in water-fast gas, there is good economic benefit and social benefit.
accompanying drawing explanation
Accompanying drawing 1 sampler process chart.
Accompanying drawing 2 samplers fill the constitutional diagram after water.
Constitutional diagram after accompanying drawing 3 sampler drainings.
Embodiment
As shown in Figures 1 to 3,
A sampler for extracting gases sample in negative-pressure pipeline, comprises gas piping 1, gas piping, absorption liquid bottle 2, sealing radiator 3, graduated cylinder 4 and valve K.
Absorption liquid bottle 2 is a chemical reaction bottle, bottle cap is the glass stopper with air intake opening and gas outlet, the air intake opening of absorption liquid bottle connects the first gas piping, the air intake opening end of absorption liquid bottle is positioned at the bottom of liquid bottle, in absorption liquid bottle 2, be equipped with can adsorption of hydrogen sulfide gas liquid, the other end of the first gas piping is connected to the coal gas acquisition port of gas piping, and a kind of concrete form is that the first gas piping is emulsion tube.The outlet of absorption liquid bottle connects the second gas piping, and more than the air entry of the second gas piping is arranged in the liquid level of absorption liquid bottle.
The complete airtight casing of sealing radiator 3 for using stainless steel to make, shape is made by oneself.Have a water injection pipe 31 and a draft tube 32 in the welded top of sealing radiator, bottom is provided with drainpipe 33.The second gas piping other end is connected in the draft tube of sealing radiator, and arranges and be respectively arranged with valve (K1, K2, K3, K4) in the first gas piping, the second gas piping, water injection pipe and drainpipe.For convenience of describing, valve is carried out to label, the label of valve is with reference to figure 2.
Water flooding regime has two kinds at least: the first, water injection pipe 31 is connected to water supply pipe, and be equipped with the top of seal case only outwards the retaining valve of exhaust (D) carry out water filling work, when water filling, can realize and fill water completely.
It two is, uses water ladle to Manual water injection in sealing radiator by funnel, is batch (-type) water filling, and this structure can be omitted the retaining valve of an exhaust.
The sampling method that uses said apparatus extracting gases sample in negative-pressure pipeline, step is as follows:
First, close the valve (K1, K2) on first, second gas piping tracheae, make the valve (K4) at drainpipe place in closed condition simultaneously, in sealing radiator, fill water by water injection pipe;
Then, close the valve (K3) on water injection pipe, open the valve (K1, K2) on first, second gas piping simultaneously and open the valve on drainpipe, when the liquid in sealing radiator stops closing when dirty the valve on drainpipe.Utilize the graduated cylinder accurate-metering of lower part to flow out the volume of water.
Complete primary sample, the sediment of the formation in absorption liquid bottle is the material absorbing, and the liquid in graduated cylinder is the volume of corresponding gas, by the content of analyzing, metering can accurately draw the test substance containing in coal gas.
It should be noted that, easy icing cold district in the winter time, the water in sealing radiator can use salt solution or anti freezing solution to substitute, and can normally use.
This sampler adopts Reduction by Drainage platen press, can accurate-metering coal gas volume, avoid error in dipping.When sampling, this device inside should keep impermeability, avoids air to sneak into.
Claims (3)
1. the sampler of an extracting gases sample in negative-pressure pipeline, comprise gas piping, gas piping, absorption liquid bottle, sealing radiator, graduated cylinder and valve, it is characterized in that, on described gas piping, insert below the liquid level in absorption liquid bottle one end of external one first gas piping and the first gas piping, be provided with water injection pipe and draft tube at the top of described sealing radiator, one second gas piping one end self-absorption liquid bottle Base top contact is also connected in the draft tube of sealing radiator, bottom at described sealing radiator is provided with drainpipe, and at the first gas piping, the second gas piping, in water injection pipe and drainpipe, be respectively arranged with valve, with graduated described graduated cylinder be placed on described drainpipe under.
According to claim 1 a kind of in negative-pressure pipeline the sampler of extracting gases sample, it is characterized in that, described water injection pipe connects water supply pipe, and is provided with an only outside retaining valve for exhaust at the top of described seal case.
3. the sampling method of extracting gases sample in negative-pressure pipeline carrying out based on any one sampler in claim 1 or 2, is characterized in that, comprises the steps:
First, close the valve on first, second gas piping, make the valve at drainpipe place in closed condition simultaneously, in sealing radiator, fill water by water injection pipe;
Then, close the valve on water injection pipe, open first, valve in draft tube and open the valve on drainpipe simultaneously, when the liquid in sealing radiator stops closing when dirty the valve on drainpipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112473.0A CN103852351B (en) | 2014-03-25 | 2014-03-25 | A kind of sampler of extracting gases sample in negative-pressure pipeline and sampling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410112473.0A CN103852351B (en) | 2014-03-25 | 2014-03-25 | A kind of sampler of extracting gases sample in negative-pressure pipeline and sampling method |
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| CN103852351A true CN103852351A (en) | 2014-06-11 |
| CN103852351B CN103852351B (en) | 2016-04-13 |
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| CN201410112473.0A Expired - Fee Related CN103852351B (en) | 2014-03-25 | 2014-03-25 | A kind of sampler of extracting gases sample in negative-pressure pipeline and sampling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107421846A (en) * | 2017-09-21 | 2017-12-01 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of suction type entrained air concentration meter and its operating method |
| CN111693341A (en) * | 2019-03-14 | 2020-09-22 | 中国石油化工股份有限公司 | Sampling device and sampling method thereof |
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2014
- 2014-03-25 CN CN201410112473.0A patent/CN103852351B/en not_active Expired - Fee Related
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4445390A (en) * | 1982-12-02 | 1984-05-01 | Leco Corporation | Sampling tube and apparatus |
| US4883505A (en) * | 1988-07-22 | 1989-11-28 | Iit Research Institute | Methods and apparatus for atmospheric sampling and analysis of trace contaminants |
| CN2145996Y (en) * | 1992-09-29 | 1993-11-10 | 中国石油化工总公司辽阳石油化纤公司 | Vacuum gas sampler |
| US7051604B1 (en) * | 1996-08-22 | 2006-05-30 | Mayeaux Holding Llc | Heat pipe sample fluid probe |
| JPH10185777A (en) * | 1996-12-26 | 1998-07-14 | Hitoshi Morishita | Device for taking-in sample gs for analysis |
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| CN2298512Y (en) * | 1997-06-28 | 1998-11-25 | 赵武昌 | Automatic continuous sampler for carbon monoxide sample |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107421846A (en) * | 2017-09-21 | 2017-12-01 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of suction type entrained air concentration meter and its operating method |
| CN111693341A (en) * | 2019-03-14 | 2020-09-22 | 中国石油化工股份有限公司 | Sampling device and sampling method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103852351B (en) | 2016-04-13 |
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