CN2821535Y - System for inrtermittently measuring circulation hydrogen flow - Google Patents
System for inrtermittently measuring circulation hydrogen flow Download PDFInfo
- Publication number
- CN2821535Y CN2821535Y CN 200520017888 CN200520017888U CN2821535Y CN 2821535 Y CN2821535 Y CN 2821535Y CN 200520017888 CN200520017888 CN 200520017888 CN 200520017888 U CN200520017888 U CN 200520017888U CN 2821535 Y CN2821535 Y CN 2821535Y
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- circulating hydrogen
- pipeline
- pressure gauge
- liquid level
- pressure
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Abstract
The utility model relates to a system for intermittently measuring the flow capacity of circulating hydrogen, which comprises two high-pressure metering pipes, a pressure difference liquid level sensor, ball valves and a pneumatic valve, wherein the tops of the two high-pressure metering pipes are respectively connected with two different measurement points positioned on circulating hydrogen pipelines through the ball valves, the pneumatic valve is connected between the two measurement points, the bottoms of the two high-pressure metering pipes are communicated by a pipeline, and the pressure difference liquid level sensor is connected between the top and the bottom of one high-pressure metering pipe. The system solves the problem that the circulating hydrogen which comprises micro water, light weight oil, high content hydrogen sulfide, ammonia, etc. influences a heat type mass flux controller, and the system realizes the purpose of accurately measuring the flow capacity of the circulating hydrogen 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 that the circulating hydrogen flow is measured in design a kind of intermittence, 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 measuring the circulating hydrogen flow intermittence of the utility model design comprises 2 high-pressure gauge burets, differential pressure type liquid level sensor, ball valve, pneumatic valve, wherein 2 high-pressure gauge buret top portion not by ball valve be positioned at the circulating hydrogen pipeline on two different measurement points link to each other, between two measurement points, be connected with pneumatic valve, the bottom of 2 high-pressure gauge burets is communicated with pipeline, is connected with the differential pressure type liquid level sensor between the top of one of them high-pressure gauge buret and the bottom.
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 is accurately measured the circulating hydrogen flow.
Description of drawings
Accompanying drawing is the system schematic of measuring the circulating hydrogen flow intermittence of the utility model design.
Embodiment
Below in conjunction with accompanying drawing system's formation of measuring the circulating hydrogen flow intermittence that the utility model designs is given further instruction.
Accompanying drawing is the system schematic of measuring the circulating hydrogen flow intermittence of the utility model design.
Two different measurement point A, B 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, high-pressure gauge buret 11 tops link to each other with measurement point A through pipeline 10, ball valve 9, pipeline 8 successively, high-pressure gauge buret 18 tops link to each other with measurement point B through pipeline 17, ball valve 16, pipeline 15 successively, the bottom of high-pressure gauge buret 11,18 is communicated with through pipeline 19, links 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.
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 B through pipeline 5 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. Ball valve 9,16 is in opening state usually, only can close when system maintenance.
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 measuring the circulating hydrogen flow intermittence of the utility model design is as follows:
After system's installation, at first high-pressure gauge buret 18 is carried out the height and the demarcation of PRESSURE-VOLUME RELATION, and the white oil of perfusion proper height.Pass through computer programming, set high limit (maximum height that in gauge line, can rise) and the lower bound (minimum altitude that white oil allows) of liquid level in gauge line, by pressure transducer 6 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.
Before the metering logical program starts, make pneumatic valve 3 be in normally open, directly enter hydrogenation reaction system through pipeline 2, pneumatic valve 3, pipeline 4, pipeline 5, pressure transducer 6, pipeline 7 successively from the circulating hydrogen pipeline 1 of compressor.
By computer programming, stipulate in 1 hour to measure the number of times of circulating hydrogen flow, and each Measuring Time, that is to say that pneumatic valve 3 cut out number of times and the length of each shut-in time in 1 hour, generally pneumatic valve 3 is in normally open.
During measurement, read the numerical value of differential pressure type liquid level sensor 21, judge whether the liquid level of high-pressure gauge buret 18 arrives or surpass the high limit of regulation.If arrive or surpass the high limit of regulation, then measure logical action and postpone an operating cycle, but under normal circumstances high-pressure gauge buret 11 is consistent with the liquid level of high-pressure gauge buret 18, can not arrive or surpass the high limit of regulation; If the liquid level of high-pressure gauge buret 18 does not have arrival or surpasses the high limit of regulation, then logical action is closed pneumatic valve 3, the circulating hydrogen that compressor comes out enters high-pressure gauge buret 11, because inside is equipped with an amount of white oil and is communicated with high-pressure gauge buret 18, under the pressure of gas, the liquid level of high-pressure gauge buret 11 descends, and the liquid level of high-pressure gauge buret 18 rises, the level change size of high-pressure gauge buret 11 is measured by differential pressure type liquid level sensor 21, thereby learn the variable quantity of liquid level in the unit interval, this variable quantity reflects that the air capacity of unit interval inner compressor is a flow, and computing machine need be proofreaied and correct practical operation temperature and pressure at that time when the accurate data of computation cycles hydrogen flowing quantity.Logical action was opened pneumatic valve 3 when the Measuring Time of setting arrived, and it is normal that flow process is recovered, the pressure unanimity of high-pressure gauge buret 11,18, and white oil sets back under the effect of gravity, and promptly the white oil height of high-pressure gauge buret 11,18 recovers consistent.Measure next time and repeat above-mentioned course of action.
Because laboratory hydrogenation plant recycle compressor flow is easy to regulate usually and discharge stability is good, therefore per hour measuring by this kind mode only needs to measure 5-6 flow, can reflect the flow of actual gas fully.And can compare by the result data and the technological requirement value of above-mentioned gas flow rate calculation, 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.
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 is accurately measured the circulating hydrogen flow.
Claims (1)
1, measures the system of circulating hydrogen flow a kind of intermittence, it is characterized in that this system comprises 2 high-pressure gauge burets, differential pressure type liquid level sensor, ball valve, pneumatic valve, wherein 2 high-pressure gauge buret top portion not by ball valve be positioned at the circulating hydrogen pipeline on two different measurement points link to each other, between two measurement points, be connected with pneumatic valve, the bottom of 2 high-pressure gauge burets is communicated with pipeline, is connected with the differential pressure type liquid level sensor between the top of one of them high-pressure gauge buret and the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520017888 CN2821535Y (en) | 2005-05-16 | 2005-05-16 | System for inrtermittently measuring circulation hydrogen flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520017888 CN2821535Y (en) | 2005-05-16 | 2005-05-16 | System for inrtermittently measuring circulation hydrogen flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2821535Y true CN2821535Y (en) | 2006-09-27 |
Family
ID=37018089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520017888 Expired - Lifetime CN2821535Y (en) | 2005-05-16 | 2005-05-16 | System for inrtermittently measuring circulation hydrogen flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2821535Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215282A (en) * | 2013-05-30 | 2014-12-17 | 中国石油化工股份有限公司 | Gas flow measuring device and method for measuring gas flow using same |
-
2005
- 2005-05-16 CN CN 200520017888 patent/CN2821535Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215282A (en) * | 2013-05-30 | 2014-12-17 | 中国石油化工股份有限公司 | Gas flow measuring device and method for measuring gas flow using same |
| CN104215282B (en) * | 2013-05-30 | 2017-10-27 | 中国石油化工股份有限公司 | Equipment for measuring gas flow rate and the method that measuring gas flow rate is carried out using the 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 |