CN107178699B - Gas collection and metering device and its application method - Google Patents
Gas collection and metering device and its application method Download PDFInfo
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- CN107178699B CN107178699B CN201610140079.7A CN201610140079A CN107178699B CN 107178699 B CN107178699 B CN 107178699B CN 201610140079 A CN201610140079 A CN 201610140079A CN 107178699 B CN107178699 B CN 107178699B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/02—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/02—Details
- F17B1/12—Gas admission or discharge arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/16—Gas-holders of variable capacity of wet type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of gas collections and metering device and its application method, the device includes air storage chamber, controller (3) and positive displacement pump (9), pressure sensor is equipped in air inlet pipe, positive displacement pump discharges liquid from leakage fluid dram, is equipped with liquid level sensor in air storage chamber；Liquid is filled in air storage chamber, control is collected in the gas flow equivalent in air storage chamber and collected in the amount of liquid being discharged from leakage fluid dram so that being passed through gas, when the intraductal atmospheric pressure that controller is at least configured to feed back pressure sensor reaches setting atmospheric pressure value, control starting positive displacement pump；The output power of real-time control positive displacement pump is to keep intraductal atmospheric pressure substantially constant；And the display liquid level of liquid level sensor is read to obtain the gas volume collected in air storage chamber.Apparatus of the present invention and method collect gas, it can be achieved that automation control, is suitable for the continuous collection of small gas flow, measures, accurate measurement, occupied area are small and do not waste valuable water resource with drainage pattern.
Description
Technical field
The present invention relates to a kind of experimental facilities, and in particular, to a kind of gas collection and metering device, in particular for gas
The drainage type device that body is continuously collected.
Background technique
In various experimentations, inevitably need to collect and measure certain gas volume, the production gas in some experimentations
It measures and unstable, pressure change is larger, is difficult to accurately measure using conventional conventional wet type flowmeter.
According to tradition bell-jar gas holder shown in 101788104 A of patent document CN104421603 A and CN or its change
Into type, then it is only applicable to gas collection and gross volume measurement, cannot achieve the continuous measurement of gas flow.By pressure, place or
It is also inaccurate to carry out gas dosing using traditional bell-jar gas holder for tolerance limitation.Bell-jar gas holder needs due-in collection gas to have
Certain pressure takes up a large area, and is not suitable for the measurement of a small amount of gas volume.
If it is needed using traditional drainage type gas holder according to pressure difference manual adjustment drainage rates, thus to drainage rates
It is difficult to accurately control, is easy to make to generate negative pressure in gas bottle and air is caused to penetrate into gas bottle.Conventional discharge formula gas holder is generally also
It is suitable only for metering, collection and the storage of short time, few tolerance, is not suitable for gas collection, the metering of continuous plant.This
Outside, if gas production is larger, the gas collection time is longer, and drainage type not only wastes valuable water resource, and the possibility of discharge is dissolved with organic matter
Water be also difficult to handle, and there is a possibility that unexpected and greatly improves in long-time artificial drainage.
Summary of the invention
It is in view of the above drawbacks of the prior art or insufficient, the present invention provides a kind of gas collection and metering device and its make
With method, the collection, metering and automatic control, record of the collection and metering of gas, especially continuous gas can be realized.
To achieve the above object, according to an aspect of the invention, there is provided a kind of gas collection and metering device, including
Air storage chamber, controller and positive displacement pump, air storage chamber are equipped with the air inlet with valve, exhaust outlet, liquid injection port and leakage fluid dram respectively, air inlet
The pressure sensor of measurement intraductal atmospheric pressure is equipped in the air inlet pipe of mouth connection, positive displacement pump discharges liquid, gas storage from leakage fluid dram
Pressure and temperature that interior is kept constant simultaneously is equipped with liquid level sensor；
Wherein, the liquid injected by liquid injection port is filled in air storage chamber, by air inlet, exhaust outlet, liquid injection port and drain
Mouthful control, enable to the gas being passed through from air inlet to be collected in air storage chamber and the gas volume amount equivalent collected in from
The volume of fluid of leakage fluid dram discharge, controller are at least configured that
When being passed through gas from air inlet, when the intraductal atmospheric pressure for feeding back pressure sensor reaches setting atmospheric pressure value, control is opened
Dynamic positive displacement pump；
The output power of real-time control positive displacement pump, to keep intraductal atmospheric pressure substantially constant；And
The display liquid level of liquid level sensor is read to obtain the gas volume collected in air storage chamber.
Preferably, air storage chamber includes the first air storage chamber and the second air storage chamber, and gas collection and metering device include total air inlet
Pipe, the total inlet pipe are connected with first branch's air inlet pipe and second branch's air inlet pipe, first branch's air inlet pipe and the first air storage chamber
The first air inlet connection and pipeline in the first intake valve, the second air inlet of second branch's air inlet pipe and the second air storage chamber are installed
The second intake valve is installed in mouth connection and pipeline；
First leakage fluid dram of the first air storage chamber returns liquid pipe by first and connect with the second liquid injection port of the second air storage chamber, and second
Second leakage fluid dram of air storage chamber returns liquid pipe by second and connect with the first liquid injection port of the first air storage chamber, and first returns liquid pipe and second
Positive displacement pump is installed jointly in return tube, returns liquid pipe or the second return tube to selectively turn on first.
Preferably, positive displacement pump includes the first positive displacement pump and the second positive displacement pump, and the first positive displacement pump is mounted on first and returns in liquid pipe,
Second positive displacement pump is mounted on second and returns in liquid pipe.
Preferably, gas collection and metering device further include the first triple valve and the second triple valve, and first returns liquid pipe and the
Two return tubes have common intermediate pipeline section, and one end of the intermediate pipeline section is equipped with the first triple valve, and the two of first triple valve
A input end is separately connected the first leakage fluid dram and the second leakage fluid dram, and the other end of intermediate pipeline section is equipped with the second triple valve, this
Two outlet ends of two triple valves are separately connected the first liquid injection port and the second liquid injection port, and positive displacement pump is mounted on the first triple valve and
In intermediate pipeline section between two triple valves.
Preferably, gas collection and metering device include total air escape pipe, which is connected with the first bypass vent pipe
With the second bypass vent pipe, the first bypass vent pipe connect with the first row port of the first air storage chamber and is equipped with first in pipeline
Exhaust valve, the second bypass vent pipe connect with the second exhaust port of the second air storage chamber and are equipped with second row air valve in pipeline, always
Gas sample mouth is equipped in exhaust pipe.
Preferably, first one end close to the first leakage fluid dram for returning liquid pipe is connected with the first drain pipe tap, the first row
First tapping valve is installed, second one end close to the second leakage fluid dram for returning liquid pipe is connected with the second drain tap in liquid pipe tap
It manages, the second tapping valve is installed in the second drain pipe tap.
Preferably, positive displacement pump is peristaltic pump.
Preferably, positive displacement pump is the drain metering pump that can measure lifting rate.
Preferably, controller is additionally configured to the valve that control closes or opens air inlet, exhaust outlet, liquid injection port and leakage fluid dram
Door.
According to another aspect of the present invention, the application method according to above-mentioned gas collection and metering device is provided, it should
Method includes:
Step 1: making the first air storage chamber fill liquid and makes the liquid level 0 of the second air storage chamber；Close first row port, the
Two air inlets and second return liquid pipe, and open the first air inlet, second exhaust port and first returns liquid pipe；
Step 2: being passed through gas from the first air inlet, when the intraductal atmospheric pressure of the first air inlet reaches setting atmospheric pressure value, control
System starting positive displacement pump returns liquid pipe by first and stores up indoor arrange with the liquid for being passed through gas volume equivalent to second of the first gas storage
Gas chamber；If gas is not collected and finished at this time, three are entered step, otherwise enters step five；
Step 3: continuing to be passed through gas until display liquid level in the first air storage chamber is 0 or the second display in air storage chamber
Liquid level is highest liquid level, switches over operation, opens second and returns liquid pipe and close first and returns liquid pipe, the first air inlet of closing and the
Two exhaust outlets, and open first row port and the second air inlet；
Step 4: being passed through gas from the second air inlet, when the intraductal atmospheric pressure of the second air inlet reaches setting atmospheric pressure value, control
System starting positive displacement pump returns liquid pipe by second and stores up indoor arrange with the liquid for being passed through gas volume equivalent to first of the second gas storage
Gas chamber；When it is 0 that the display liquid level in the first air storage chamber, which is display liquid level in highest liquid level or the second air storage chamber, carry out again
Handover operation returns to step 1；
Step 5: after gas collection, the volume of gas of statistical collection.
Preferably, in step 5, the number of handover operation is recorded, and after recording last time handover operation, is passed through gas
First air storage chamber of body or the display liquid level of the second air storage chamber to obtain the indoor residual gas volume of the gas storage, and calculate gas
Body total volume；
Wherein, work as V1=V2When, VGas=n (V1+V2)/2+V'；
Work as V1>V2When, VGas=nV2+V'；
Work as V1<V2When, VGas=nV1+V'；
V1For the volume of the first air storage chamber, V2For the volume of the second air storage chamber, VGasFor the volume of gas of collection.
Preferably, when positive displacement pump, which is, can measure the drain metering pump of lifting rate, in step 5, by reading drain
Total lifting rate of pump obtains volume of gas.
Preferably, the above method further include: the instantaneous lifting rate by recording positive displacement pump obtains instant gas flow.
In the present invention, it is passed through the gas of certain pressure, into the air storage chamber for fill liquid by air inlet with the side of draining
Formula collects gas, wherein can be realized automation control, the metering of gas collection by controller, and feeds back pressure sensor
Intraductal atmospheric pressure reach setting atmospheric pressure value when just control starting positive displacement pump, can avoid generation negative pressure and suck air, air storage chamber can
Greatly can be small, it is suitable for the collection of small gas flow, when in particular by two interconnected air storage chambers, liquid can be in gas pressure
Under conveyed repeatedly between an air storage chamber and another air storage chamber, collection, metering especially suitable for continuous gas, metering is quasi-
Really, occupied area is small and does not waste valuable water resource.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is a kind of gas collection of preferred embodiment according to the present invention and the structure principle chart of metering device；
Fig. 2 is another gas collection of preferred embodiment and the structure principle chart of metering device according to the present invention；
Fig. 3 is similar with Fig. 2, pumps the difference is that using independent two drainage meterings.
Description of symbols
1 first air storage chamber, 2 second air storage chamber
3 controller, 4 total inlet pipe
5 total air escape pipes 6 first backflow water pipe
7 second return tube, 8 first triple valve
9 drainage meterings pump 10 second triple valves
11 first pressure sensor, 21 second pressure sensor
12 first liquid level sensor, 22 second liquid level sensor
41 first branch's air inlet pipe, 42 second branch's air inlet pipe
51 first bypass vent pipe, 52 second bypass vent pipe
J1 the first air inlet the second air inlet of J2
P1 first row port P2 second exhaust port
Z1 the first water filling port the second water filling port of Z2
S1 the first discharge outlet the second discharge outlet of S2
AJFirst intake valve BJSecond intake valve
APFirst row air valve BPSecond row air valve
AZFirst water injection valve BZSecond water injection valve
ASFirst drain valve BSSecond drain valve
Q gas sample mouth
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
As shown in Figure 1, the present invention provides a kind of gas collection and metering device, which includes with metering device
Air storage chamber, controller 3 and positive displacement pump 9, air storage chamber are equipped with the air inlet with valve, exhaust outlet, liquid injection port and leakage fluid dram respectively, into
The pressure sensor of measurement intraductal atmospheric pressure is equipped in the air inlet pipe of port connection, positive displacement pump 9 discharges liquid from leakage fluid dram, stores up
The pressure and temperature that keeps constant in gas chamber is simultaneously equipped with liquid level sensor；Wherein, the liquid injected by liquid injection port is filled in air storage chamber
Body (such as the water used in present embodiment) can be made by the control to air inlet, exhaust outlet, liquid injection port and leakage fluid dram
It obtains the gas being passed through from air inlet and is collected in the gas volume amount equivalent in air storage chamber and collected in the liquid being discharged from leakage fluid dram
Body volume, controller 3 are at least configured that
When being passed through gas from air inlet, when the intraductal atmospheric pressure for feeding back pressure sensor reaches setting atmospheric pressure value, control is opened
Dynamic positive displacement pump 9；
The output power of real-time control positive displacement pump 9, to keep intraductal atmospheric pressure substantially constant；And
The display liquid level of liquid level sensor is read to obtain the gas volume collected in air storage chamber.
Apparatus of the present invention are collected with draining mode by air storage chamber and gas and are measured, different from traditional bell-jar gas holder and
Drainage type gas holder is especially provided with pressure sensor combination controller in apparatus of the present invention, can be realized gas collection process
Automation control avoids generation negative pressure in air storage chamber from sucking outside air by pressure control, can by level sensor
Real time readouts, record obtain and collect gas flow or even instant gas flow.And apparatus of the present invention are suitable for testing with stingy
The collection of the scale of construction, plant bulk is small, takes up little area.
Particularly, to obtain continuous gas collection, and water resource waste is avoided, device basic shown in Fig. 1 is enterprising
One step is improved, using two interconnected air storage chambers, make liquid can under the action of input gas an air storage chamber with separately
It is conveyed repeatedly between one air storage chamber.As shown in Fig. 2, air storage chamber include the first air storage chamber 1 and the second air storage chamber 2, gas collection with
Metering device includes total inlet pipe 4, which is connected with first branch's air inlet pipe 41 and second branch's air inlet pipe 42, the
One branch's air inlet pipe 41 connect with the first air inlet J1 of the first air storage chamber 1 and is equipped with the first intake valve A in pipelineJ, second
Branch's air inlet pipe 42 connect with the second air inlet J2 of the second air storage chamber 2 and is equipped with the second intake valve B in pipelineJ；Wherein,
First leakage fluid dram S1 of one air storage chamber 1 returns liquid pipe 6 by first and connect with the second liquid injection port Z2 of the second air storage chamber 2, the second storage
Second leakage fluid dram S2 of gas chamber 2 returns liquid pipe 7 by second and connect with the first liquid injection port Z1 of the first air storage chamber 1, and first returns liquid pipe 6
With in the second return tube 7 positive displacement pump 9 is installed jointly, returns liquid pipe 6 or the second return tube 7 to selectively turn on first.
As it can be seen that being provided with two air storage chambers in device shown in Fig. 2, by the setting of branch's air inlet pipe, gas be may be selected
Property enter two air storage chambers, and the setting by returning liquid pipe can be under the action of being passed through gas, so that liquid is stored up at two
It is back and forth transmitted between gas chamber, the gas being passed through can be collected in two exhaust outlet aggregations, to realize the cumulative statistics of gas flow.This
Sample, when inputting gas to the first air storage chamber 1, gas collection is in the first air storage chamber 1, simultaneously because the of the first air storage chamber 1
One leakage fluid dram S1 returns liquid pipe 6 by first and connect with the second liquid injection port Z2 of the second air storage chamber 2, so that the row of the first air storage chamber 1
Water is all in the second air storage chamber 2 of injection.When the water of the first air storage chamber 1 is emptied completely, by the handover operation to intake valve, i.e.,
Close the first intake valve AJOpen simultaneously the second intake valve BJ, close second row air valve BP, open first row air valve AP, so as to
Second air storage chamber 2 inputs gas, and the water of the second air storage chamber 2 returns liquid pipe 7 by second and is perfused to the first air storage chamber 1.In this way, even
The continuous gas being passed through can inject in turn under control in two air storage chambers, and water is caused to transmit repeatedly between two air storage chambers, control
Device processed can accumulate the gas flow for calculating and collecting gas repeatedly, thus particularly suitable for the metering of the continuity of a small amount of gas, automation prison
It surveys and controls.
Wherein, to realize that the gas being passed through from air inlet is collected in air storage chamber completely without leaking outside, so that collect
Gas flow can equivalent in the amount of liquid being discharged from leakage fluid dram, can be by air inlet, exhaust outlet, liquid injection port and row in Fig. 1
The switch control of liquid mouth realizes, can also returning liquid pipe connection type and realize by liquid injection port and leakage fluid dram as shown in Figure 2.
It adds up and collects for convenience of gas, the gas collection and metering device of Fig. 2 further includes total air escape pipe 5, the total air escape pipe 5
It is connected with the first bypass vent pipe 51 and the second bypass vent pipe 52, the first of the first bypass vent pipe 51 and the first air storage chamber 1
First row air valve A is installed in exhaust outlet P1 connection and pipelineP, the second row of the second bypass vent pipe 52 and the second air storage chamber 2
Second row air valve B is installed in port P2 connection and pipelineP.It is received in this way, convenient gas aggregation can be carried out by total air escape pipe 5
Collection.Moreover, one or several gas samples mouth Q can be equipped in total air escape pipe 5, easily to the first air storage chamber 1 or the second
Air storage chamber 2 carries out gas sample.
As shown in Fig. 2, the gas collection and metering device further include the first triple valve 8 and the second triple valve 10, first is returned
Liquid pipe 6 and the second return tube 7 have common intermediate pipeline section, and one end of the intermediate pipeline section is equipped with the first triple valve 8, this first
For the tool of triple valve 8 there are two input end and one outlet end, two input end is separately connected the first leakage fluid dram S1 and the second drain
Mouthful S2, the other end of intermediate pipeline section are equipped with the second triple valve 10, second triple valve 10 tool there are two outlet end and one into
Mouth end, two outlet end are separately connected the first liquid injection port Z1 and the second liquid injection port Z2, and positive displacement pump 9 is mounted on the first triple valve 8
In intermediate pipeline section between the second triple valve 10.In this way, can be facilitated by switching control of the controller 3 to two triple valves
Realize the first switched conductive for returning liquid pipe 6 and the second return tube 7 in ground.
Certainly selectively, positive displacement pump 9 can also there are two, as shown in figure 3, the first positive displacement pump therein is independently mounted at
First returns in liquid pipe 6, and the second positive displacement pump is independently mounted at second and returns in liquid pipe 7, i.e., first return liquid pipe 6 and the second return tube 7 it
Between there is no common intermediate pipeline section, two return tubes are non-intersecting, and independently installed in respective return tube have positive displacement pump 9.In this way,
It is controlled by startup-shutdown of the controller 3 to two positive displacement pumps 9, also can be realized the first switching for returning liquid pipe 6 and the second return tube 7
Conducting.
In addition, the first also side of one end close to the first leakage fluid dram S1 for returning liquid pipe 6 is connected to first row for convenience of to exterior liquid
Liquid pipe tap is equipped with the first tapping valve A in the first drain pipe tapS, second returns the close second leakage fluid dram S2's of liquid pipe 7
One end is also connected with the second drain pipe tap, is equipped with the second tapping valve B in the second drain pipe tapS.It can complete in this way
It carries out being emptied completely or realize that liquid substitutes for the indoor liquid of gas storage by drain pipe tap after experiment.
Wherein, positive displacement pump 9 is preferably peristaltic pump, and convenient for control flow, pressure, accuracy is high.It can be equipped in controller 3
Such as pressure measurement feedback control loop is communicated with first pressure inductor 11 and second pressure inductor 21, can also be equipped with liquid level
It measures feedback control loop and the first liquid level sensor 12 and the second liquid level sensor 22 communicates, can also be equipped with recording unit and meter
Unit etc. is calculated, it is following by the switching control number specifically addressed, real-time display liquid level and instant gas flow to record, it calculates and adds
Total gas flow etc..In addition, each valve of manual manipulation, such as the first water injection valve A can be passed throughZ, the second water injection valve BZ etc., but more
It can be carried out automatically controlling by setting solenoid valve, proportion electro-magnet etc. by controller 3, i.e., it is automatic to control according to control program needs
System closes or opens each valve of air inlet, exhaust outlet, liquid injection port and leakage fluid dram.
Above-mentioned gas is collected with metering device when in use, and following steps are generally included, it may be assumed that
Step 1: making the first air storage chamber 1 fill liquid and makes the liquid level 0 of the second air storage chamber 2；Close first row port
P1, the second air inlet J2 and second return liquid pipe 7, and open J1 mouthfuls of the first air inlet, second exhaust port P2 and first returns liquid pipe 6；I.e.
The preparation process of gas is passed through to the first air storage chamber 1；
Step 2: being passed through gas from the first air inlet J1, when the intraductal atmospheric pressure of the first air inlet J1 reaches setting atmospheric pressure value
When, control starting positive displacement pump 9 returns liquid pipe 6 for arranging in the first air storage chamber 1 with the liquid for being passed through gas volume equivalent by first
To the second air storage chamber 2；If gas is not collected and finished at this time, three are entered step, otherwise enters step five；I.e. to the first air storage chamber 1
It is passed through the implementation steps of gas and its process control, monitoring record；As previously mentioned, in process control, it should be noted that metering pump
Start point, the output power of real-time control positive displacement pump 9 avoids generating air storage chamber negative pressure to keep intraductal atmospheric pressure substantially constant.If
Gas flow is smaller, then the collection to gas can be completed in the first air storage chamber 1 by step 1 and step 2, i.e., is filled by Fig. 1
It sets and collection can be completed, gas has continuity and tolerance is larger if being passed through, and needs to continue step 3；
Step 3: continuing to be passed through gas until the display liquid level in the first air storage chamber 1 is 0 or second in air storage chamber 2
Display liquid level be highest liquid level, switch over operation, open second and return liquid pipe 7 and closing first returns liquid pipe 6；Close first into
Port J1 and second exhaust port P2 and first row port P1 and the second air inlet J2 is made to keep open-minded；It is i.e. logical to the second air storage chamber 2
Enter preparation process and the air inlet switching, liquid flow direction switching of gas；
Step 4: being passed through gas from the second air inlet J2, when the intraductal atmospheric pressure of the second air inlet J2 reaches setting atmospheric pressure value
When, control starting positive displacement pump 9 returns liquid pipe 7 for arranging in the second air storage chamber 2 with the liquid for being passed through gas volume equivalent by second
To the first air storage chamber 1；When the display liquid level in the first air storage chamber 1 is the display liquid in highest liquid level or the second air storage chamber 2
When position is 0, operation is switched over again, returns to step 1；This step 4 is that the implementation step of gas is passed through to the second air storage chamber 2
Suddenly and again switching control step；
Step 5: after gas collection, the volume of gas V of collection is calculatedGas。
This step 5 records and calculates step.When positive displacement pump 9 is common water pump, the frequency n of handover operation can record,
And after recording last time handover operation, it is passed through the first air storage chamber 1 of gas or the display liquid level of the second air storage chamber 2, to obtain
The indoor residual gas volume V ' of the gas storage；
To work as V1=V2When, VGas=n (V1+V2)/2+V'；
Work as V1>V2When, VGas=nV2+V'；
Work as V1<V2When, VGas=nV1+V'；
V1For the volume of the first air storage chamber 1, V2For the volume of the second air storage chamber 2.
The frequency n of handover operation represents the reciprocal transportation number of the co-content liquid of the smallest air storage chamber of volume, in addition most
The indoor collection gas flow of gas storage (i.e. residual gas volume V ') of gas is passed through after a handover operation afterwards, i.e. accumulation is collected
Volume of gas VGas。
Particularly, positive displacement pump 9 can also be all types of drain metering pumps with lifting rate metering, statistical function, because
And in step 5, it can directly be obtained by total lifting rate of positive drain and the reversed drain of reading positive displacement pump 9 shown in Fig. 2
Obtain volume of gas VGas, or as shown in figure 3, return and be respectively present independent positive displacement pump 9 in liquid pipe 6 and the second return tube 7 when first
When, total lifting rate, that is, equivalent gas total volume V of two positive displacement pumps 9Gas.In addition, can also pass through total lifting rate of drain metering pump
Come to the volume of gas V for example obtained by above-mentioned formulaGasIt is compared, verifies.
Wherein, using apparatus of the present invention, total gas flow of collection can be not only accurately calculated, it can also be by peristaltic pump
Accurately, real-time control obtains instant gas flow and recording its instantaneous lifting rate.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, various letters can be carried out to technical solution of the present invention
Monotropic type, such as the present invention is not limited to use peristaltic pump 9, can also be substituted by the positive displacement pump of other equivalent efficacies；These are simple
Modification is fallen within the protection scope of the present invention.
Each particular technique feature described in above-mentioned specific embodiment can pass through in the case of no contradiction
Any suitable way is combined, and in order to avoid unnecessary repetition, the present invention is no longer another to various combinations of possible ways
Row explanation.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (13)
1. a kind of gas collection and metering device, including air storage chamber, controller (3) and positive displacement pump (9), the air storage chamber, which is equipped with, to be divided
The not air inlet with valve, exhaust outlet, liquid injection port and leakage fluid dram are equipped with gas in measurement pipe in the air inlet pipe of air inlet connection
The pressure sensor of pressure, the positive displacement pump (9) discharge liquid, the pressure kept constant in the air storage chamber from the leakage fluid dram
Power and temperature are simultaneously equipped with liquid level sensor；
Wherein, the liquid injected by the liquid injection port is filled in the air storage chamber, by the air inlet, exhaust outlet, fluid injection
The control of mouth and leakage fluid dram enables to the gas being passed through from the air inlet to be collected in the gas in the air storage chamber and collected
Body volume equivalent is at least configured that in the volume of fluid being discharged from the leakage fluid dram, the controller (3)
When being passed through gas from the air inlet, when the intraductal atmospheric pressure of the pressure sensor feedback being made to reach setting atmospheric pressure value, control
System starts the positive displacement pump (9)；
The output power of positive displacement pump described in real-time control (9), to keep the intraductal atmospheric pressure constant；And
The display liquid level of the liquid level sensor is read to obtain the gas volume collected in the air storage chamber.
2. gas collection according to claim 1 and metering device, wherein the air storage chamber includes the first air storage chamber (1)
With the second air storage chamber (2), the gas collection and metering device include total inlet pipe (4), which is connected with first
Branch's air inlet pipe (41) and second branch's air inlet pipe (42), first branch air inlet pipe (41) and first air storage chamber (1)
The first air inlet (J1) connection and pipeline in the first intake valve (A is installedJ), second branch air inlet pipe (42) with it is described
The second air inlet (J2) of second air storage chamber (2) connects and is equipped with the second intake valve (B in pipelineJ)；And
The first leakage fluid dram (S1) of first air storage chamber (1) returns the of liquid pipe (6) and second air storage chamber (2) by first
The second leakage fluid dram (S2) of two liquid injection ports (Z2) connection, second air storage chamber (2) passes through the second return tube (7) and described first
The first liquid injection port (Z1) of air storage chamber (1) connects, and described first returns and install jointly in liquid pipe (6) and the second return tube (7)
Positive displacement pump (9) are stated, return liquid pipe (6) or the second return tube (7) to selectively turn on described first.
3. gas collection according to claim 2 and metering device, wherein the positive displacement pump (9) includes the first positive displacement pump
With the second positive displacement pump, first positive displacement pump is mounted on described first and returns in liquid pipe (6), and second positive displacement pump is mounted on described
In second return tube (7).
4. gas collection according to claim 2 and metering device, wherein the gas collection further includes with metering device
First triple valve (8) and the second triple valve (10), described first, which returns liquid pipe (6) and the second return tube (7), has common centre
Pipeline section, one end of the intermediate pipeline section are equipped with first triple valve (8), two input ends difference of first triple valve (8)
First leakage fluid dram (S1) and the second leakage fluid dram (S2) are connected, the other end of the intermediate pipeline section is equipped with second threeway
Valve (10), two outlet ends of second triple valve (10) are separately connected first liquid injection port (Z1) and the second liquid injection port
(Z2), the positive displacement pump (9) is mounted on the intermediate pipeline section between first triple valve (8) and the second triple valve (10)
In.
5. gas collection according to claim 2 and metering device, wherein the gas collection and metering device are including total
Exhaust pipe (5), the total air escape pipe (5) are connected with the first bypass vent pipe (51) and the second bypass vent pipe (52), and described first
Bypass vent pipe (51) connect with the first row port (P1) of first air storage chamber (1) and is equipped with first row air valve in pipeline
(AP), the second bypass vent pipe (52) connect with the second exhaust port (P2) of second air storage chamber (2) and pacifies in pipeline
Equipped with second row air valve (BP), gas sample mouth (Q) is equipped in the total air escape pipe (5).
6. gas collection according to claim 2 and metering device, wherein described first returns the close described of liquid pipe (6)
One end of first leakage fluid dram (S1) is connected with the first drain pipe tap, is equipped with the first tapping valve in the first drain pipe tap
(AS), second return tube (7) is connected with the second drain pipe tap close to one end of second leakage fluid dram (S2), this
Second tapping valve (B is installed in two drain pipe tapsS)。
7. gas collection according to claim 1 and metering device, wherein the positive displacement pump (9) is peristaltic pump.
8. gas collection according to claim 1 and metering device, wherein the positive displacement pump (9) is that can measure drain
The drain metering pump of amount.
9. gas collection according to claim 1 and metering device, wherein the controller (3) is additionally configured to control and closes
Close or open the valve of the air inlet, exhaust outlet, liquid injection port and leakage fluid dram.
10. the application method of gas collection according to claim 5 and metering device, comprising:
Step 1: so that first air storage chamber (1) is filled liquid and make the liquid level 0 of second air storage chamber (2)；Described in closing
First row port (P1), the second air inlet (J2) and the second return tube (7), and open first air inlet (J1), second row
Port (P2) and first returns liquid pipe (6)；
Step 2: being passed through gas from first air inlet (J1), sets when the intraductal atmospheric pressure of first air inlet (J1) reaches
When determining atmospheric pressure value, control starts the positive displacement pump (9), and returning liquid pipe (6) by described first will be in first air storage chamber (1)
It is arranged with the liquid for being passed through gas volume equivalent to second air storage chamber (2)；If gas is not collected and finished at this time, enter step
Three, otherwise enter step five；
Step 3: continuing to be passed through gas until the display liquid level in first air storage chamber (1) is 0 or second air storage chamber
(2) the display liquid level in is highest liquid level, switches over operation, opens second return tube (7) and closing described the
One returns liquid pipe (6), closes first air inlet (J1) and second exhaust port (P2), and open the first row port (P1) and
Second air inlet (J2)；
Step 4: being passed through gas from second air inlet (J2), sets when the intraductal atmospheric pressure of second air inlet (J2) reaches
When determining atmospheric pressure value, control starts the positive displacement pump (9), will be in second air storage chamber (2) by second return tube (7)
It is arranged with the liquid for being passed through gas volume equivalent to first air storage chamber (1)；The display in first air storage chamber (1)
Liquid level is the display liquid level in highest liquid level or the second air storage chamber (2) when being 0, switches over operation again, back to walking
Rapid one；
Step 5: after gas collection, the volume of gas (V of statistical collectionGas)。
11. the application method of gas collection according to claim 10 and metering device, wherein in the step 5,
The number (n) of the handover operation is recorded, and after recording last time handover operation, is passed through first air storage chamber of gas
(1) or the display liquid level of the second air storage chamber (2), to obtain the indoor residual gas volume (V ') of the gas storage；
Wherein, work as V1=V2When, VGas=n (V1+V2)/2+V'；
Work as V1>V2When, VGas=nV2+V'；
Work as V1<V2When, VGas=nV1+V'；
V1For the volume of first air storage chamber (1), V2For the volume of second air storage chamber (2), VGasIt is overall for the gas of collection
Product.
12. the application method of gas collection according to claim 10 and metering device, wherein the positive displacement pump (9) is
The drain metering pump that lifting rate can be measured, in the step 5, total lifting rate by reading the positive displacement pump (9) is obtained
Volume of gas (the VGas)。
13. the application method of gas collection according to claim 10 and metering device, wherein this method further include: logical
The instantaneous lifting rate of positive displacement pump described in overwriting (9) and obtain instant gas flow.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610140079.7A CN107178699B (en) | 2016-03-11 | 2016-03-11 | Gas collection and metering device and its application method |
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| CN201610140079.7A CN107178699B (en) | 2016-03-11 | 2016-03-11 | Gas collection and metering device and its application method |
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| US7240535B2 (en) * | 2005-09-07 | 2007-07-10 | Microsensor Systems, Inc. | Method and apparatus for gas measurement at substantially constant pressure |
| CN101435712B (en) * | 2008-12-26 | 2010-07-21 | 青岛崂山应用技术研究所 | Device for measuring air volume flow |
| CN103674156B (en) * | 2013-12-30 | 2016-06-22 | 农业部环境保护科研监测所 | A kind of metering method utilizing laboratory micro gas-metering device |
| CN105203176A (en) * | 2014-06-11 | 2015-12-30 | 孟尧 | Novel fluid-discharge method gas amount metering device |
| CN204694318U (en) * | 2015-06-06 | 2015-10-07 | 长春黄金研究院 | A kind of measuring device for gas |
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