CN107084766B - Ammonia filling metering device, slow ammonia filling and rapid ammonia filling metering method - Google Patents
Ammonia filling metering device, slow ammonia filling and rapid ammonia filling metering method Download PDFInfo
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- CN107084766B CN107084766B CN201710357290.9A CN201710357290A CN107084766B CN 107084766 B CN107084766 B CN 107084766B CN 201710357290 A CN201710357290 A CN 201710357290A CN 107084766 B CN107084766 B CN 107084766B
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 331
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 156
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 37
- 230000008859 change Effects 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000005429 filling process Methods 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
- G01F1/88—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure with differential-pressure measurement to determine the volume flow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Exhaust Gas After Treatment (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an ammonia filling metering device which is used for metering ammonia in a solid ammonia storage tank and comprises a first valve body, a unit tank, a flow acquisition device, a second valve body and a controller which are sequentially communicated, wherein the first valve body is communicated with an air source, the second valve body is communicated with the solid ammonia storage tank, a temperature sensor is arranged on the unit tank, a throttling element, a gas temperature sensor, a front-end pressure sensor and a rear-end pressure sensor are arranged on the flow acquisition device, the controller comprises a signal acquisition device, an operation device and a control device, the signal acquisition device is simultaneously connected with the temperature sensor, the gas temperature sensor, the front-end pressure sensor and the rear-end pressure sensor through signals, and the control device is connected with the first valve body and the second valve body. By metering in the ammonia filling stage, the mass of the ammonia filled in the solid ammonia storage tank is rapidly metered. The invention also discloses a slow ammonia filling and rapid ammonia filling metering method based on the ammonia filling metering device.
Description
Technical Field
The invention relates to the technical field of gas flow metering, in particular to an ammonia filling metering device, a slow ammonia filling method and a quick ammonia filling method.
Background
The solid ammonia technology is an off-machine post-treatment technology which is emerging in recent years, active substances in the ammonia storage tank adsorb ammonia, the ammonia can be released after being heated, and then the ammonia is sprayed by the spraying system to carry out selective catalytic reduction treatment on NOx in the tail gas, so that the pollution of pollutants in the tail gas to the environment and the harm to human bodies are reduced.
When the ammonia in the ammonia storage tank of the solid ammonia system is used up, the ammonia storage tank needs to be refilled with ammonia again. The mass of the ammonia gas filled into the ammonia storage tank is not only the basis for judging whether the whole ammonia filling process is finished, but also the cruising ability of the ammonia storage tank is determined.
At present, if the mass of ammonia filled in the ammonia storage tank is to be determined in the ammonia filling process, the best method is to weigh the ammonia storage tank, but the large volume and mass of the ammonia storage tank bring great workload to weighing.
Therefore, how to provide an ammonia filling metering device to realize rapid metering of the quality of filling ammonia gas in a solid ammonia storage tank is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention aims to provide an ammonia filling metering device for realizing rapid metering of the mass of ammonia filled in a solid ammonia storage tank. Another object of the present invention is to provide a method for metering slow and fast ammonia filling based on the above-mentioned metering device.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The utility model provides a fill ammonia metering device for solid ammonia storage tank's fill ammonia metering, is including the first valve body, unit jar, flow collection device and the second valve body that communicate in proper order, still includes the controller, wherein, the inlet end of first valve body communicates with the air supply of ammonia, the end of giving vent to anger of second valve body communicates with solid ammonia storage tank, be provided with temperature sensor on the unit jar, be provided with throttling element, gas temperature sensor, front end pressure sensor and rear end pressure sensor on the flow collection device, gas temperature sensor with front end pressure sensor sets up one side of throttling element and is close to the air supply, rear end pressure sensor sets up the opposite side of throttling element and keeps away from the air supply, the controller includes signal acquisition device, operation device and controlling means, signal acquisition device simultaneously with temperature sensor gas temperature sensor front end pressure sensor with rear end pressure sensor signal connection, controlling means with the second valve body is connected.
Preferably, the first valve body is a solenoid valve.
Preferably, the second valve body is a solenoid valve.
The invention further provides an ammonia filling metering device which is used for metering ammonia in the solid ammonia storage tank and comprises a first valve body, a unit tank and a second valve body which are sequentially communicated, and further comprises a controller, wherein the air inlet end of the first valve body is communicated with an air source of ammonia, the air outlet end of the second valve body is communicated with the solid ammonia storage tank, a temperature sensor and a pressure sensor are arranged on the unit tank, the controller comprises a signal acquisition device, an operation device and a control device, the signal acquisition device is simultaneously connected with the temperature sensor and the pressure sensor in a signal mode, and the control device is connected with the first valve body and the second valve body.
Preferably, the first valve body is an electromagnetic valve, and the second valve body is an electromagnetic valve.
The invention also provides an ammonia filling metering device for metering the ammonia in the solid ammonia storage tank, which comprises a first valve body, a flow acquisition device, a second valve body and a controller, wherein the first valve body, the flow acquisition device and the second valve body are sequentially communicated,
The air inlet end of the first valve body is communicated with an air source of ammonia gas, the air outlet end of the second valve body is communicated with a solid ammonia storage tank,
The flow acquisition device is provided with a throttling element, a gas temperature sensor, a front-end pressure sensor and a rear-end pressure sensor, the gas temperature sensor and the front-end pressure sensor are arranged on one side of the throttling element and are close to the gas source, the rear-end pressure sensor is arranged on the other side of the throttling element and is far away from the gas source,
The controller comprises a signal acquisition device, an operation device and a control device, wherein the signal acquisition device is simultaneously connected with the temperature sensor, the gas temperature sensor, the front-end pressure sensor and the rear-end pressure sensor in a signal manner, and the control device is connected with the first valve body and the second valve body.
Preferably, the flow collection device is multiple and parallel-connected.
Preferably, the flow measuring ranges of the plurality of flow collecting devices are different.
The invention also provides an ammonia filling metering method for rapidly filling ammonia, which is based on the ammonia filling metering device and comprises the following steps: simultaneously, the first valve body and the second valve body are opened, ammonia in the air source directly enters the solid ammonia storage tank from the air source through the ammonia filling metering device, at the moment, the air flow is calculated through the flow collecting device, when the ammonia flows through the throttling piece in the flow collecting device, the flow speed is locally contracted at the throttling piece, so that the flow speed is increased, the static pressure is reduced, then, pressure difference is formed at the front end and the rear end of the throttling piece, the faster the air flow speed is, the pressure difference is larger, the flow is calculated according to the pressure difference, the controller can collect temperature information and pressure difference information through the air temperature sensor, the front end pressure sensor and the rear end pressure sensor on the flow collecting device, then calculate the flow value, and accumulate the mass values to obtain the accumulated mass of the ammonia filling.
The invention also provides an ammonia filling metering method for slow ammonia filling, which is based on the ammonia filling metering device and comprises the following steps: step 1) the unit tank inflating stage: the controller opens the first valve body and closes the second valve body, ammonia in the air source charges the unit tank, the temperature sensor of the unit tank measures the temperature value of the air in the unit tank, the front-end pressure sensor on the flow acquisition device measures the pressure in the unit tank because the flow acquisition device is communicated with the unit tank, when the pressure in the unit tank is the same as the pressure of the air source, the pressure in the unit tank tends to be stable, after the front-end pressure sensor acquires that the pressure value in the tank is stable, the controller can judge that the charging stage of the unit tank is finished, records the air pressure value and the temperature value in the unit tank at the moment, and controls the ammonia charging metering device to enter the next stage; step 2) the unit tank deflation stage: at this stage, the controller closes the first valve body and opens the second valve body, the ammonia gas in the unit tank is inflated to the solid ammonia storage tank, and after the pressure in the unit tank is reduced to a set value, the controller determines that the deflation stage is finished; step 3) flow calculation stage: at this stage, the controller closes both the first valve body and the second valve body, calculates the reduced ammonia gas mass in the unit tank by the pressure difference before and after the unit tank deflation stage and the change of the temperature value of the gas in the unit tank, i.e., the mass of the ammonia gas filled into the solid ammonia storage tank in the present slow filling cycle, and then adds the calculated ammonia gas mass to the accumulated mass.
The invention provides an ammonia filling metering device which is used for metering ammonia in a solid ammonia storage tank and comprises a first valve body, a unit tank, a flow acquisition device and a second valve body which are sequentially communicated, and further comprises a controller, wherein an air inlet end of the first valve body is communicated with an air source of ammonia, an air outlet end of the second valve body is communicated with the solid ammonia storage tank, a temperature sensor is arranged on the unit tank, a throttling element, a gas temperature sensor, a front end pressure sensor and a rear end pressure sensor are arranged on the flow acquisition device, the gas temperature sensor and the front end pressure sensor are arranged on one side of the throttling element and are close to the air source, the rear end pressure sensor is arranged on the other side of the throttling element and far away from the air source, and the controller comprises a signal acquisition device, an operation device and a control device, wherein the signal acquisition device is simultaneously connected with the temperature sensor, the gas temperature sensor, the front end pressure sensor and the rear end pressure sensor in a signal connection mode, and the control device is connected with the first valve body and the second valve body. By metering in the ammonia filling stage, the mass of the ammonia filled in the solid ammonia storage tank is rapidly metered.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an ammonia charging metering device according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a flow collection device according to an embodiment of the present invention.
In the above figures 1-2:
the device comprises a unit tank 1, a flow acquisition device 2, a controller 3, a gas source 4, a first valve body 5, a temperature sensor 6, a gas temperature sensor 7, a front-end pressure sensor 8, a rear-end pressure sensor 9, a second valve body 10, a solid ammonia storage tank 11 and a throttling element 12.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an ammonia filling metering device according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a flow collection device according to an embodiment of the present invention.
The ammonia filling metering device provided by the embodiment of the invention is used for metering ammonia in a solid ammonia storage tank and comprises a first valve body 5, a unit tank 1, a flow acquisition device 2 and a second valve body 10 which are sequentially communicated, and further comprises a controller 3, wherein the air inlet end of the first valve body 5 is communicated with an air source 4 of ammonia, the air outlet end of the second valve body 10 is communicated with the solid ammonia storage tank 11, a temperature sensor 6 is arranged on the unit tank 1, a throttling element 12, a gas temperature sensor 7, a front end pressure sensor 8 and a rear end pressure sensor 9 are arranged on the flow acquisition device 2, the gas temperature sensor 7 and the front end pressure sensor 8 are arranged on one side of the throttling element 12 and close to the air source 4, the rear end pressure sensor 9 is arranged on the other side of the throttling element 12 and far away from the air source 4, the controller 3 comprises a signal acquisition device, an operation device and a control device, and the signal acquisition device is simultaneously connected with the temperature sensor 6, the gas temperature sensor 7, the front end pressure sensor 8 and the rear end pressure sensor 9 in a signal connection mode, and the control device is connected with the first valve body 5 and the second valve body 10. By metering in the ammonia filling stage, the mass of the ammonia filled in the solid ammonia storage tank is rapidly metered.
All sensors in the ammonia filling metering device are respectively connected with a signal acquisition device of the controller 3, and analog signals are converted into digital signals through an A/D conversion circuit. The arithmetic device analyzes and calculates the digital signal and controls the operation of the whole device according to the result of the arithmetic. The first valve body 5 and the second valve body 10 are connected with a control device of the controller 3, and the controller 3 controls the operation of the whole device through controlling the two valve bodies.
Specifically, when in use, there are two metering methods, one is an ammonia filling metering method during rapid ammonia filling, the other is an ammonia filling metering method during slow ammonia filling, the measuring parameters during rapid ammonia filling and slow ammonia filling are different, and the metering processes are also different.
The method for metering the ammonia during rapid ammonia filling is based on the ammonia filling metering device and comprises the following steps: simultaneously, the first valve body 5 and the second valve body 10 are opened, ammonia in the air source 4 directly enters the solid ammonia storage tank 11 from the air source 4 through the ammonia filling metering device, at the moment, the air flow is calculated through the flow acquisition device 2, when the ammonia flows through the throttling piece 12 in the flow acquisition device 2, the flow speed is locally contracted at the throttling piece 12, so that the flow speed is increased, the static pressure is reduced, then, the pressure difference is formed at the front end and the rear end of the throttling piece 12, the faster the air flow speed is, the pressure difference is larger, the flow is calculated according to the pressure difference, at the moment, the controller 3 can acquire temperature information and pressure difference information through the air temperature sensor 7, the front end pressure sensor 8 and the rear end pressure sensor 9 on the flow acquisition device 2, then calculate the flow value, and the mass values are accumulated to obtain the ammonia filling accumulated mass.
The method for metering the ammonia during slow ammonia filling is based on the ammonia filling metering device and comprises the following steps: step 1) unit tank inflation stage: the controller 3 opens the first valve body 5 and closes the second valve body 10, ammonia in the air source 4 inflates the unit tank 1, the temperature sensor 6 of the unit tank 1 measures the temperature value of the air in the unit tank 1, the front end pressure sensor 7 on the flow acquisition device 2 measures the pressure in the unit tank 1 because the flow acquisition device 2 is communicated with the unit tank 1, when the pressure in the unit tank 1 is the same as the pressure of the air source 4, the pressure in the unit tank 1 tends to be stable, after the front end pressure sensor 7 acquires the pressure value in the tank to be stable, the controller 3 can judge that the inflation stage of the unit tank 1 is finished, records the air pressure value and the temperature value in the unit tank at the moment, and controls the ammonia charging metering device to enter the next stage; step 2) unit tank deflation stage: at this stage, the controller 3 closes the first valve body 5 and opens the second valve body 10, the ammonia gas in the unit tank 1 is inflated to the solid ammonia storage tank 11, and after the pressure in the unit tank 1 drops to the set value, the controller 3 determines that the deflation stage is finished; step 3) flow calculation stage: at this stage, the controller 3 closes both the first valve body 5 and the second valve body 10, and the controller 3 calculates the ammonia gas mass reduced in the unit tank 1, that is, the ammonia gas mass charged into the solid ammonia storage tank 11 in this slow charge cycle, by the pressure difference before and after the deflation stage of the unit tank 1 and the change in the temperature value of the gas in the unit tank 1, and then adds the calculated ammonia gas mass to the accumulated mass.
Generally, the whole ammonia filling process is divided into two stages: a fast inflation phase and a slow inflation phase. The rapid inflation stage realizes flow measurement through a flow acquisition device, and the slow inflation stage device measures through calculating the front and rear mass difference of the unit tank deflation stage.
Among them, the controller 3 also has an abnormality diagnosis function. When the data collected by the sensor is abnormal, the controller 3 can stop the device and give an alarm to remind an operator to process the fault, and meanwhile, the primary diagnosis is made on the fault cause according to the abnormality of the data, so that a reference is provided for the further diagnosis of the operator.
The embodiment of the invention also provides an ammonia filling metering device which is used for metering ammonia in the solid ammonia storage tank 11 and comprises a first valve body 5, a unit tank 1 and a second valve body 10 which are sequentially communicated, and a controller 3, wherein the air inlet end of the first valve body 5 is communicated with the air source 4 of ammonia, the air outlet end of the second valve body 10 is communicated with the solid ammonia storage tank 11, a temperature sensor 6 and a pressure sensor are arranged on the unit tank 1, the controller 3 comprises a signal acquisition device, an operation device and a control device, the signal acquisition device is simultaneously connected with the temperature sensor 6 and the pressure sensor in a signal mode, and the control device is connected with the first valve body 5 and the second valve body 10. In this embodiment, the flow rate acquisition device 2 is not added, and the filling quality is calculated only by measuring the pressure difference and the temperature information before and after the deflation stage of the unit tank 1 after the pressure sensor is added to the unit tank 1.
Wherein the first valve body 5 is an electromagnetic valve. The second valve body 10 is a solenoid valve.
The embodiment of the invention also provides an ammonia filling metering device which is used for metering ammonia of the solid ammonia storage tank and comprises a first valve body 5, a flow acquisition device 2 and a second valve body 6 which are sequentially communicated, and further comprises a controller 3, wherein the air inlet end of the first valve body 5 is communicated with an air source 4 of ammonia, the air outlet end of the second valve body 10 is communicated with the solid ammonia storage tank 11, a throttling element 12, a gas temperature sensor 7, a front end pressure sensor 8 and a rear end pressure sensor 9 are arranged on the flow acquisition device 2, the gas temperature sensor 7 and the front end pressure sensor 8 are arranged on one side of the throttling element 12 and are close to the air source 4, the rear end pressure sensor 9 is arranged on the other side of the throttling element 12 and is far away from the air source 4, the controller 3 comprises a signal acquisition device, an operation device and a control device, and the signal acquisition device is simultaneously connected with the gas temperature sensor 7, the front end pressure sensor 8 and the rear end pressure sensor 9 in a signal connection with the first valve body 5 and the second valve body 10. By metering in the ammonia filling stage, the mass of the ammonia filled in the solid ammonia storage tank is rapidly metered.
The flow collection devices 2 are arranged in parallel, and flow ranges of the flow collection devices 2 are different. The whole ammonia filling metering device is connected with a plurality of flow acquisition devices 2 with different flow measuring ranges in parallel. The whole ammonia filling process is to measure the ammonia filling quality through the flow acquisition device 2, the controller 3 calculates the current flow through the information acquired by the sensor on the flow acquisition device 2, and the flow acquisition device 2 suitable for the current flow is selected through controlling the switch of the electromagnetic valve according to the change of the flow. Of course, the manner of connecting a plurality of flow rate acquisition devices 2 in parallel is also within the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. An ammonia filling metering device for metering ammonia in a solid ammonia storage tank is characterized by comprising a first valve body, a unit tank, a flow acquisition device and a second valve body which are sequentially communicated, and further comprising a controller, wherein,
The air inlet end of the first valve body is communicated with an air source of ammonia gas, the air outlet end of the second valve body is communicated with a solid ammonia storage tank,
A temperature sensor is arranged on the unit tank,
The flow acquisition device is provided with a throttling element, a gas temperature sensor, a front-end pressure sensor and a rear-end pressure sensor, the gas temperature sensor and the front-end pressure sensor are arranged on one side of the throttling element and are close to the gas source, the rear-end pressure sensor is arranged on the other side of the throttling element and is far away from the gas source,
The controller comprises a signal acquisition device, an operation device and a control device, wherein the signal acquisition device is simultaneously connected with the temperature sensor, the gas temperature sensor, the front-end pressure sensor and the rear-end pressure sensor in a signal manner, and the control device is connected with the first valve body and the second valve body;
In the ammonia filling measurement during rapid ammonia filling, calculating the gas flow through the flow acquisition device;
In the ammonia filling metering during the slow ammonia filling, the controller calculates the mass of the ammonia gas reduced in the unit tank through the pressure difference before and after the unit tank deflation stage and the change of the temperature value of the gas in the unit tank, namely the mass of the ammonia gas filled into the solid ammonia storage tank in the slow ammonia filling cycle.
2. The ammonia dosing device of claim 1, wherein the first valve body is a solenoid valve.
3. The ammonia dosing device of claim 2, wherein the second valve body is a solenoid valve.
4. A method for metering the ammonia filling rate of rapid ammonia filling is characterized in that based on the ammonia filling metering device of claim 1,
Comprising the following steps:
Simultaneously opening the first valve body and the second valve body,
The ammonia in the air source directly enters the solid ammonia storage tank from the air source through the ammonia filling metering device, at the moment, the flow rate of the air is calculated through the flow rate acquisition device,
When the ammonia gas flows through the throttling element in the flow acquisition device, the flow velocity is locally contracted at the throttling element, so that the flow velocity is increased, the static pressure is reduced, the pressure difference is formed at the front end and the rear end of the throttling element, the faster the gas flow velocity is, the larger the pressure difference is, the flow is calculated according to the pressure difference, the controller acquires temperature information and pressure difference information through the gas temperature sensor, the front end pressure sensor and the rear end pressure sensor on the flow acquisition device, then calculates a flow value, and adds up mass values to obtain the ammonia filling accumulated mass.
5. A method for metering the ammonia filling rate of slow ammonia filling is characterized in that based on the ammonia filling metering device of claim 1,
Comprising the following steps:
Step 1) the unit tank inflating stage: the controller opens the first valve body and closes the second valve body, ammonia in the air source charges the unit tank, the temperature sensor of the unit tank measures the temperature value of the air in the unit tank, the front-end pressure sensor on the flow acquisition device measures the pressure in the unit tank because the flow acquisition device is communicated with the unit tank, when the pressure in the unit tank is the same as the pressure of the air source, the pressure in the unit tank tends to be stable, after the front-end pressure sensor acquires that the pressure value in the tank is stable, the controller can judge that the charging stage of the unit tank is finished, records the air pressure value and the temperature value in the unit tank at the moment, and controls the ammonia charging metering device to enter the next stage;
Step 2) the unit tank deflation stage: at this stage, the controller closes the first valve body and opens the second valve body, the ammonia gas in the unit tank is inflated to the solid ammonia storage tank, and after the pressure in the unit tank is reduced to a set value, the controller determines that the deflation stage is finished;
Step 3) flow calculation stage: at this stage, the controller closes both the first valve body and the second valve body, calculates the reduced ammonia gas mass in the unit tank by the pressure difference before and after the unit tank deflation stage and the change of the temperature value of the gas in the unit tank, i.e., the mass of the ammonia gas filled into the solid ammonia storage tank in the present slow filling cycle, and then adds the calculated ammonia gas mass to the accumulated mass.
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| CN201710357290.9A CN107084766B (en) | 2017-05-19 | 2017-05-19 | Ammonia filling metering device, slow ammonia filling and rapid ammonia filling metering method |
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| CN201710357290.9A CN107084766B (en) | 2017-05-19 | 2017-05-19 | Ammonia filling metering device, slow ammonia filling and rapid ammonia filling metering method |
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| CN104748809A (en) * | 2015-03-30 | 2015-07-01 | 王向乔 | Intelligent metering instrument based on pressure regulator and metering method |
| CN206818262U (en) * | 2017-05-19 | 2017-12-29 | 吉林省众鑫汽车装备有限公司 | Fill ammonia metering device |
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| CN102751170A (en) * | 2011-04-19 | 2012-10-24 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Semiconductor processing device |
| JP2014206450A (en) * | 2013-04-12 | 2014-10-30 | 中国電力株式会社 | Instrumentation system and measurement method for receiving flow rate of liquefied ammonia storage tank |
| CN103775822A (en) * | 2014-02-12 | 2014-05-07 | 北京空间机电研究所 | Full-automatic high-precision super-pure gas filling system |
| CN104748809A (en) * | 2015-03-30 | 2015-07-01 | 王向乔 | Intelligent metering instrument based on pressure regulator and metering method |
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