CN2821536Y - System for continiuously measuring circulation hydrogen flow - Google Patents
System for continiuously measuring circulation hydrogen flow Download PDFInfo
- Publication number
- CN2821536Y CN2821536Y CN 200520017889 CN200520017889U CN2821536Y CN 2821536 Y CN2821536 Y CN 2821536Y CN 200520017889 CN200520017889 CN 200520017889 CN 200520017889 U CN200520017889 U CN 200520017889U CN 2821536 Y CN2821536 Y CN 2821536Y
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- pneumatic valve
- measurement point
- pipeline
- circulating hydrogen
- pressure gauge
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Abstract
The utility model relates to a system for continuously measuring the flow capacity of circulating hydrogen, which comprises two high-pressure metering pipes, a pressure difference liquid level sensor and four pneumatic valves, wherein the top of a high-pressure metering pipe 11 is connected with a measurement point A positioned on a pipeline for the circulating hydrogen through a pneumatic valve 9, and is also connected with a measurement point C positioned on the pipeline for the circulating hydrogen through a pneumatic valve 23; the top of a high-pressure metering pipe 18 is directly connected with a measurement point B positioned on the pipeline for the circulating hydrogen, and the pressure difference liquid level sensor is connected between the top and the bottom of the high-pressure metering pipe 18; the bottoms of the two high-pressure metering pipes are communicated by a pipeline, a pneumatic valve 3 is connected between the measurement point A and the measurement point B, a pneumatic valve 15 is connected between the measurement point B and the measurement point C, the pneumatic valve 9 and the pneumatic valve 15 are driven by instrument wind from the same air source, and the pneumatic valve 3 and the pneumatic valve 23 are driven by instrument wind from the same air source. The system can continuously and accurately measure the flow capacity of the circulating hydrogen with foreign matters for a long period.
Description
Technical field
The utility model relates to a kind of metering system of measurement gas flow, more particularly, belongs to the system of a kind of experiments of measuring chamber hydrogenation plant circulating hydrogen flow.
Technical background
Along with the reinforcement of global environmental consciousness, countries in the world are worked out various environment amenable petroleum products specifications one after another, and the impurity content in the petroleum products, burning performance and composition etc. have been proposed more strict restriction.Hydrogenation plant is because of the spatter property of its process and product, and occupies the position that becomes more and more important in oil refining enterprise, and the application of hydrogen addition technology is extensive day by day.For this reason, each research institution satisfies the demand of market to hydrogen addition technology both at home and abroad, is just strengthening the construction dynamics of hydropyrolysis experiment device, in the hope of accelerating technological development speed.
The laboratory hydrogenation plant especially is applied to the middle-scale device of hydrogenation technique research, and hydrogen adopts the cycling mode mostly, and thermal mass flow meter (or controller) is now adopted in its flow measurement mostly.The advantage of thermal mass flow meter (or controller) is the measuring accuracy height, and its main shortcoming is that the requirement medium cleans very much.But in actual applications, especially in poor oil hydropyrolysis experiment process, the sulfuretted hydrogen and the ammonia that may contain micro-moisture and lightweight oil and high level in the recyclegas, they all can pass through the screen pack of thermal mass flow meter (or controller), the above two not only can make the kapillary of thermal mass flow controller not smooth, and owing to be liquid and greatly influence the thermostat temperature of thermal mass flow meter (or controller), thereby influence accuracy of measurement and precision; Back both pass through to understand crystallization in the kapillary of thermal mass flow meter (or controller) behind the screen pack, stop up kapillary, influence accuracy of measurement.
The designer had once taked various filtration measures in mass flowmeter (or controller) use for many years, as at the preceding canister that adds of mass flowmeter (or controller), in canister, pack into molecular sieve, wool felt etc., play the adsorption filtration effect, but all can't make the long-term operate as normal of mass-flow gas meter (or controller), can not satisfy the requirement of long-term operation in the trace amount of foreign gas environment is arranged substantially.
The utility model content
The purpose of this utility model is the system of a kind of continuous coverage circulating hydrogen flow of design, to satisfy the requirement that long period is accurately measured the circulating hydrogen flow in the trace amount of foreign gas environment.
The system of the continuous coverage circulating hydrogen flow of the utility model design comprises two high-pressure gauge burets, differential pressure type liquid level sensor, four pneumatic valves, one of them high-pressure gauge buret 11 top by pneumatic valve 9 be positioned at the circulating hydrogen pipeline on measurement point A link to each other, this high-pressure gauge buret top also by pneumatic valve 23 be positioned at the circulating hydrogen pipeline on measurement point C link to each other; Another high pressure measurement 18 pipe tops directly be positioned at the circulating hydrogen pipeline on measurement point B link to each other, be connected with the differential pressure type liquid level sensor between the top of this high-pressure gauge buret and the bottom, the bottom of two high-pressure gauge burets is communicated with pipeline, between measurement point A, B, be connected with pneumatic valve 3, between measurement point B, C, be connected with pneumatic valve 15, pneumatic valve 9 is supplied with instrument wind with pneumatic valve 15 by same source of the gas and is driven, and pneumatic valve 3 is supplied with instrument wind with pneumatic valve 23 by same source of the gas and driven.
This system has solved because of circulating hydrogen contains the influence to the thermal mass flow controller such as the sulfuretted hydrogen of micro-moisture, lightweight oil and high level and ammonia, reaches the purpose that long period continuously, is accurately measured the circulating hydrogen flow.
Description of drawings
Accompanying drawing is the system schematic of the continuous coverage circulating hydrogen flow of the utility model design.
Embodiment
Below in conjunction with accompanying drawing the system of the continuous coverage circulating hydrogen flow of the utility model design is constituted and to give further instruction.
Accompanying drawing is the system schematic of the continuous coverage circulating hydrogen flow of the utility model design.
Three different measurement point A, B, C are arranged on circulating hydrogen pipeline 1, link to each other through pipeline 2, pneumatic valve 3, pipeline 4 successively between measurement point A, the B, link to each other through pipeline 5, pneumatic valve 15, pipeline 27 successively between measurement point B, the C, high-pressure gauge buret 11 tops link to each other with measurement point A through pipeline 10, pneumatic valve 9, pipeline 8 successively, and high-pressure gauge buret 11 tops also link to each other with measurement point C through pipeline 25, pneumatic valve 23, pipeline 26 successively; High-pressure gauge buret 18 tops directly link to each other with measurement point B through pipeline 17, the bottom of high-pressure gauge buret 11,18 is communicated with through pipeline 19, link to each other through pipeline 22, differential pressure type liquid level sensor 21, pipeline 20 successively between the top of high-pressure gauge buret 18 and the bottom, drive pipeline 16 through same instrument wind between pneumatic valve 9 and the pneumatic valve 15 and link to each other, link to each other through same instrument wind driving pipeline 24 between pneumatic valve 3 and the pneumatic valve 23.
Setting pressure sensor 6 on circulating hydrogen pipeline 1, the position of pressure transducer 6 is not particularly limited, and links to each other with measurement point C as an end, and the other end links to each other with pipeline 7.
For the ease of maintenance, through pipeline 12 mounting ball valves 13, the other end of ball valve 13 links to each other with pipeline 14 in the bottom of high-pressure gauge buret 11.
In the high-pressure gauge buret 11,18 white oil or similar mediums are housed all, need to analyze the density of this kind oil product before packing into.
The course of work of the system of the continuous coverage circulating hydrogen flow of the utility model design is as follows:
After system's installation, at first two gauge lines are carried out the height and the demarcation of PRESSURE-VOLUME RELATION, and the white oil of perfusion proper height.Pass through computer programming, set the high limit H (maximum height that in gauge line, can rise) and the lower bound (minimum altitude that in gauge line, can descend) of liquid level, read the pressure of this test automatically, the temperature (can manually import or adopt temperature survey point to read in automatically) of metering system position when testing.
Four pneumatic valves of gauge line system are often to drive pneumatic valve owing to what adopt, pneumatic valve 9,15 is one group, pneumatic valve 3,23 is one group, is in normally open so start preceding four pneumatic valves at accounting procedure, directly enters hydrogenation reaction system from the circulating hydrogen of compressor.
Measure beginning, whether the actual liquid level of at first judging high-pressure gauge buret 18 is greater than (H+L)/2.If liquid level greater than (H+L)/2, is then closed pneumatic valve 9,15, pneumatic valve 3,23 still is in opening; If liquid level is less than or equal to (H+L)/2, then close pneumatic valve 3,23, pneumatic valve 9,15 still is in opening.(this time can be set according to recycle hydrogen gas flow flexible in size when programming in logic) timing in 2 minutes simultaneously begins, circulating hydrogen from compressor enters high-pressure gauge buret 18, because inside is equipped with an amount of white oil and is communicated with high-pressure gauge buret 11, under the pressure of gas, high-pressure gauge buret 18 liquid levels descend, and the liquid level of high-pressure gauge buret 11 rises, the variation size of high-pressure gauge buret 18 liquid levels is measured by differential pressure type liquid level sensor 21, read liquid level numerical value in 2 minutes when finishing, thereby learn the variable quantity of liquid level in 2 fens clock times, this variable quantity reflects that the air capacity of unit interval inner compressor is a gas flow, and computing machine need be proofreaied and correct temperature and pressure when accurately calculating gas flow.Must judge during timing in 2 minutes whether high-pressure gauge buret 18 actual liquid level height arrive the lower bound that sets, then do not continue to measure in next 2 minutes if arrive, then switch pneumatic valve (pass pneumatic valve 3 immediately if arrive lower bound, 23, drive pneumatic valve 9,15), the liquid level of high-pressure gauge buret 11 begins falling-rising down at this moment, and on high-pressure gauge buret 18 liquid levels begin, 2 minutes gas flow measurements are once constantly carried out in beginning, and must judge at each whether high-pressure gauge buret 18 actual liquid level height arrive the high limit that sets during timing in 2 minutes, then do not continue to measure in next 2 minutes if arrive, then switch pneumatic valve (pass pneumatic valve 9 immediately if arrive high limit, 15, drive pneumatic valve 3,23).Above-mentioned two continuous repetitions of changing direction reach the purpose of continuous coverage circulating hydrogen flow.
Because laboratory hydrogenation plant recycle compressor flow is easy to regulate usually and discharge stability is good, result data and technological requirement value by the above-mentioned gas flow rate calculation compare, motor speed data according to certain adjusted compressor of relational expression, thereby automatically regulate the rotating speed of compressor electric motor, make compressor flowrate meet the numerical value of arts demand, reach the purpose of carrying out the measurement of gas flow automatically and regulating flow automatically.
This system has solved because of circulating hydrogen contains the influence to the thermal mass flow controller such as the sulfuretted hydrogen of micro-moisture, lightweight oil and high level and ammonia, reaches the purpose that long period continuously, is accurately measured the circulating hydrogen flow.
Claims (1)
1, a kind of system of continuous coverage circulating hydrogen flow, it is characterized in that this system comprises two high-pressure gauge burets, differential pressure type liquid level sensor, four pneumatic valves, one of them high-pressure gauge buret (11) top by pneumatic valve (9) be positioned at the circulating hydrogen pipeline on measurement point (A) link to each other, this high-pressure gauge buret top also by pneumatic valve (23) be positioned at the circulating hydrogen pipeline on measurement point (C) link to each other; Another high pressure measurement (18) pipe top directly be positioned at the circulating hydrogen pipeline on measurement point (B) link to each other, be connected with the differential pressure type liquid level sensor between the top of this high-pressure gauge buret and the bottom, the bottom of two high-pressure gauge burets is communicated with pipeline, between measurement point (A), (B), be connected with pneumatic valve (3), between measurement point (B), (C), be connected with pneumatic valve (15), pneumatic valve (9) is supplied with instrument wind with pneumatic valve (15) by same source of the gas and is driven, and pneumatic valve (3) is supplied with instrument wind with pneumatic valve (23) by same source of the gas and driven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520017889 CN2821536Y (en) | 2005-05-16 | 2005-05-16 | System for continiuously measuring circulation hydrogen flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520017889 CN2821536Y (en) | 2005-05-16 | 2005-05-16 | System for continiuously measuring circulation hydrogen flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2821536Y true CN2821536Y (en) | 2006-09-27 |
Family
ID=37018090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520017889 Expired - Lifetime CN2821536Y (en) | 2005-05-16 | 2005-05-16 | System for continiuously measuring circulation hydrogen flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2821536Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588818A (en) * | 2017-10-18 | 2018-01-16 | 涂勇 | A kind of gas draining gas-metering device |
| CN110736503A (en) * | 2019-10-17 | 2020-01-31 | 浙江高成绿能科技有限公司 | continuous gas measuring device |
-
2005
- 2005-05-16 CN CN 200520017889 patent/CN2821536Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588818A (en) * | 2017-10-18 | 2018-01-16 | 涂勇 | A kind of gas draining gas-metering device |
| CN110736503A (en) * | 2019-10-17 | 2020-01-31 | 浙江高成绿能科技有限公司 | continuous gas measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150516 Granted publication date: 20060927 |