CN106125775B - Based on the method for being evaporated, measuring and controlling to steam flow - Google Patents
Based on the method for being evaporated, measuring and controlling to steam flow Download PDFInfo
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- CN106125775B CN106125775B CN201610519491.XA CN201610519491A CN106125775B CN 106125775 B CN106125775 B CN 106125775B CN 201610519491 A CN201610519491 A CN 201610519491A CN 106125775 B CN106125775 B CN 106125775B
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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- G05D7/06—Control of flow characterised by the use of electric means
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Abstract
It is based on being evaporated steam flow the invention discloses one kind, the device of metering and control, container for evaporation is provided in heater box, weighing apparatus and display system are installed in heater box, weighing apparatus is connect with container for evaporation and display system simultaneously, container for evaporation is connected with jet chimney, it is connected to inside jet chimney and container for evaporation, and shut-off valve is provided on jet chimney, and shut-off valve can cut off corresponding jet chimney, control valve is provided on jet chimney, control valve can cut off jet chimney, handle is provided in heater box, handle is connected with bindiny mechanism, and bindiny mechanism connect with control valve.Steam flow is measured by balance weight method, steam flow is controlled using the aperture for manually controlling control valve, have the advantages that good reliability, it is high using temperature, suitable for smaller steam flow metering and steam flow can be controlled, effective supplement can be formed for existing steam-flow meter.
Description
Technical field
The invention belongs to the metering of flow and control technology fields, and in particular to one kind is based on steaming steam flow
Hair, metering and the method controlled.
Background technique
The metering of steam flow is one crucial technology of chemical field, mainly uses vortex-shedding meter or differential pressure stream at present
The metering of meter progress steam flow.After the completion of evaporation, the cooling deposit generated of high-temperature steam can block and corrode flowmeter,
Therefore measuring accuracy is gradually reduced, and be easy to cause the failure of flowmeter.Steam-flow meter using temperature generally at 350 DEG C hereinafter,
The steam for being more than 350 DEG C to evaporating temperature cannot measure, and not be suitable for the metering of smaller steam flow.In addition, steam stream
The metering for being mainly used for steam flow of meter, generally without the control function of steam flow, it is therefore desirable to find new steam stream
The metering and control method of amount.
Document 1, the Chinese patent of Patent No. 201410047972.6 disclose a kind of steam vortex street of measuring multiple parameters
Flowmeter, swirl generating body are mounted in the inner hole with measurement pipe table body, in the outside with measurement pipe table body and are located at vortex hair
The positive back vertical open pores installation of the raw body flow sensor, is equipped with support barrel mast above with measurement pipe table body,
The support barrel mast covers flow sensor, and the flow integrator is mounted on the upper end end of support barrel mast.The present invention
The parameter that can measure steam is more, broad quantum, and precision height, the pressure loss for measuring steam are small, and multiple sensors are based on integrated
It the advantages that design, flowmeter structure is compact, and high reliablity, manufacturing cost are low, working service is convenient, life of product is long, uses
Flow sensor and temperature sensor resistant to high temperature, so that the steam vortex flowmeter of the measuring multiple parameters can measure saturation and steam
Vapour can measure the superheated steam of higher temperature again.
Document 2, the Chinese patent of Patent No. 03820649.8 are related to a kind of method, wherein being flowed using bluff body (20)
Vortex is generated in body, and determines the repetition rate for generating vortex.Determining repetition rate is used to calculate flow measurement (XV),
It represents volume flow or flow velocity.In addition, two measurement points (M1, the M2) record being separated from each other in the flowing direction acts on stream
Two pressure ps 1 and p2 of body.At least one in these pressure is at least with repetition rate periodically-varied.1 He of pressure p of record
P2 is used to generate pressure measuring value (Xp), what representative at least partly acted in the flowing direction on one section of average time period
Average dynamic pressure.Pressure measuring value (Xp) and flow measurement (XV) are used to determine the mass flow measurement (Xm) of fluid.
Document 3, the Chinese patent of Patent No. 200710133653.7 are related to a kind of flowmeter, specially a kind of split type
Vortex-shedding meter.It is made of sensor, conditioning circuit module and digital signal processing module, three kinds of sensors and conditioning circuit
Module is placed in the tested scene of high temperature, and digital signal processing module is under normal temperature environment, is connected between module by shielded cable
It connects, signal is transmitted in the form of differential signal.It solves the technical issues of prior art may not apply to hot environment, can be with
Applied to the special occasions of hot environment and the split type instrument of needs, there is good anti-interference ability and reliability.
Document 4, the Chinese patent of Patent No. 201320110735.0 are related to a kind of suitable for industrial automation instrument neck
The flowmeter in domain, more particularly, to a kind of steam-flow meter, it includes interior wimble device, is successively combined on interior wimble device cold
Condenser, difference become component and buckling component, interior wimble device be bracket in measurement pipe, measurement pipe, on bracket with V-arrangement inner cone
Body composition；The utility model unique structure facilitates user installation, high, scene accurate to flow measurement of steam that can show a variety of ginsengs
Count and have 485 communication interfaces, convenient for user's transmission, acquisition and management.
Document 5, the Chinese patent of Patent No. 200910011212.9 are related to heavy crude heat extraction steam and drive steam injection well high temperature height
The thick oil thermal extraction saturated steam flow metering method for pressing saturated vapor one-well metering, is to pass through thick oil thermal extraction saturated steam
What flowmeter was realized, the flowmeter is by pressure sensor, display, differential pressure speed changer, V-type cone, temperature sensor composition: pressure
Force snesor is threadedly coupled with metering pipeline, display and pressure sensor, differential pressure transmitter, temperature sensor screw thread, V-type cone
Body and differential pressure transmitter are welded to connect；This method is to connect thick oil thermal extraction saturated steam flowmeter and manifold and steam injection well screw thread
It connects, generates differential pressure at V-type cone both ends when steam passes through the flowmeter, realize the precise measurement to saturated vapor flow velocity,
Flow velocity is converted into flow signal feeding computing system with differential pressure speed changer and shows steam one-well metering at any time.This method solves
The problem of cannot measuring single well flow in the prior art.It is full that the present invention can be used for heavy crude heat extraction steam drive steam injection well high temperature and pressure
In steam one-well metering.
Document 6, Patent No. 200820068517.4 disclose a kind of integrated pressure-differential type steam flow meter, including throttling
Device, the ring flange in throttling set are mounted in measurement pipe, and orifice plate is equipped in measurement pipe, is respectively placed in the pressure of orifice plate two sides
Pipe is extend into the high pressure room and low pressure room of equalizing reservoir, and equalizing reservoir is connect by pressure guiding pipe with three valve groups, three valve groups
It is connect with differential pressure meter.The pressure room part of pressure guiding pipe, three valve groups and differential pressure meter has under the liquid level of equalizing reservoir
Downward inclination angle.The equipment such as throttling set, pressure pipe, equalizing reservoir and differential pressure meter are integrated in the utility model,
The workload for reducing live processing and fabricating, facilitates in-site installation, improves work efficiency, and reduces the skill of in-site installation personnel
Energy；After integration, the reliability of device ensure that, improve the quality of product
Document 7, the Chinese patent of Patent No. 201220685281.5 disclose a kind of difference of intelligent measure steam flow
Pressure type flowmeter and pressure measuring unit comprising throttling element, connecting pipe, its further include differential pressure transmitter or intelligent flow-integrating instrument,
The differential pressure transmitter or intelligent flow-integrating instrument is connect with the positive and negative pressure chamber of throttling element respectively by connecting pipe, wherein with just
The connecting pipe of pressure chamber connection is plemum conduit, and the pilot connecting with negative pressure chamber is negative pressure chamber's conduit, the plemum conduit
Be respectively provided with one group or more helix tube on negative pressure chamber's conduit, the spiral pipe diameter is 1mm~40mm, helix tube and horizontal plane
Angle is 0~45 DEG C, a switch valve is further respectively had on the plemum conduit and negative pressure chamber's conduit or equipped with one three
Valve group connects plemum conduit and negative pressure chamber's conduit, helix tube and differential pressure transmitter or intelligence on the plemum conduit simultaneously
The pipeline of flow integrator connection is additionally provided with pressure sensor.The utility model fills connecting pipe without anti-icing fluid, compact-sized,
It is small in size.
Document 8, the Chinese patent of Patent No. 201320155941.3 disclose a kind of condensation weighing method steam-flow meter
Measure standard set-up, including vacuum tank, temperature transmitter, pressure transmitter, flowmeter, manual ball valve, pneumatic ball valve, pneumatic butterfly
Valve, pneumatic control valve, direct-operated regulator, meter-clamping apparatus, electronic scale, condenser, cooling tower, water pump, each component are connected by pipeline
It connects.After vapour source passes through vacuum tank, pressure regulation enters calibrating pipeline, by being detected flowmeter, into condenser, by being accredited steaming
The steam of steam flow meter carries out whole condensations, and carries out Weighing to condensed water, the condensate quality of weighing and passes through steam
The quality of steam of flowmeter is compared, and is completed the calibrating to steam-flow meter, is improved the degree of automation, temperature, pressure can
Control, can examine and determine multiple caliber flowmeter, and the accuracy of measuring is reliable, and calibrating efficiency is high, play certain effect for national energy-saving consumption reduction.
Document 9,03 periodical of nineteen eighty-three have delivered Guangzhou Nitrogenous Fertilizer Factory and have succeeded in developing a kind of steam flow caliberating device, can be to work
Industry carries out verification calibration with steam-flow meter.Steam is first condensed into water using timing weight method in kind by it, then to water weigh with
Determine steam flow.The device is made of vapour source, condenser, timer, weighing utensil and various monitoring instruments.Small investment,
Low energy consumption.
Document 02 phase periodical in 10,2009 discloses the analysis on Uncertainty that steam flows calibrating vortex-shedding meter in fact, vortex street
Flowmeter mainly uses with air the calibrating of vortex-shedding meter by meterings that are a large amount of, being widely used in steam flow at present
It is examined and determine instead of steam as calibrating medium, is inevitably had a certain impact to verification result.Article is based on condensation and claims
Weight method steam flow calibrating installation examines and determine vortex-shedding meter, and analyzes result, gives and fails to be sold at auction in fact in steam
The uncertainty evaluation method and result fixed.
Document 11, the Chinese patent of Patent No. 201210564802.6 disclose a kind of for dynamic gas flow analysis
Weight-loss method detection of gas flow rate method.It uses following detecting step: establishing the Dynamic link library of electronic balance and computer, starts
Gas generator and beginning timing and weighing, the volumetric flow of gas of unit of account time, obtain flow-time curve figure, inspection
Measured data processing and analysis.It utilizes the Dynamic link library of electronic balance and computer, the gaseous mass of real-time detection gas generator
Flow completes corresponding detection process using the weighing software of computer, comprising: balance type selecting and configuration, the conversion of volume flow, inspection
Survey the setting of duration, the drafting of flow-time curve figure, data process&analysis.It is widely used in all kinds of middle-size and small-size gases
The detection of gas flow rate of generator can be used for the gas flow dynamic detection of quality variation corresponding with the time.Present invention tool
There is the advantage that easy to operate, detection is safe and detection accuracy height is good with live adaptability.
Document 12, the Chinese patent of Patent No. 201110147057.0 disclose a kind of mass flow based on weight method
Meter, including container, the top of container are equipped with water inlet, and lower part is equipped with water outlet, and the bottom of container is equipped with weighing sensor, container
The lower section of interior water inlet is equipped with water conservancy diversion and anti-impact device.When can reduce flow dynamics measurement, hydraulic shock power is symmetrically retransmitted
Measurement error caused by sensor, and the larger impurity in drainage can be crossed by this device, solve line clogging and water circulation system
It unites unsmooth problem.
Document 13, a kind of fabric treatment apparatus of the U.S. Patent Publication of Patent No. US20060464514, including have
The steam generator of water container, the service for delivering water into water container, monitor steam generator weight weight sensor,
Cooperate with weight sensor and utilizes the controller of the signal of weight sensor control water supply line water flow.The invention provides
The method for carrying out water flow control using weight sensor.
Document 14, the Chinese patent of Patent No. 200510131200.1 disclose a kind of weightless flowmeter and weight-loss method stream
Amount controller.It solves flow detection device used in existing industrial automation production, and structure is complicated, at high cost, easily loss etc.
Problem has structure simple, has the advantages that anti-corrosion ability, measurement is accurate, and control mode is flexible.A kind of its structure are as follows: weightlessness
Method flowmeter and weight-loss method flow controller, it further includes sensor that it, which has power supply, and sensor will measure resulting weight value signal
Microprocessor is sent into after amplifier and digitizer are converted to digital signal；Microprocessor is defeated after handling signal
Out；The control signal can also be communicated by interface circuit and host computer, and weight and flow value are transferred on host computer, are convenient for
The monitoring management of host computer, the weight value measured while being sent into memory, convenient for process query in the future；Weight and flow value
It can be shown by display, microprocessor also passes through key device and parameter is arranged.
Document 15, the Chinese patent of Patent No. 201010120967.5 disclose a kind of dynamic weighing of high-viscosity fluid
The scale body output end of system and method, the system is connected with weight display instrument and weighing controller simultaneously, the Weighing control
The output control terminal of device is connected by frequency converter with high-viscosity fluid barrel pump, and the high-viscosity fluid barrel pump is high viscous by being inserted into
High-viscosity fluid is pumped into scale body by the pump rod in property fluid charging basket；This method is pumped high-viscosity fluid using high-viscosity fluid barrel pump
It gets in scale body, scale body feeds back to weighing-up wave in weighing controller, and weighing controller is poor using dynamic according to control parameter
It is worth penalty method and measures minimum discharge method and pass through the pump speed of Frequency Converter Control high-viscosity fluid barrel pump.The present invention has rational design,
It realizes and function is precisely weighed to the dynamic of high-viscosity fluid, ensure that weighing precision and weighing speed, meet to high viscosity
The requirement that the dynamic of fluid is precisely weighed, while having the characteristics that easy to use, applied widely.
Document 16, the Chinese patent of Patent No. CN 200710147395 disclose a kind of detection control precision height, can use
In the flow controller of deep-etching liquid.Using weighing and weightless two ways measuring flow.Output takes step type electric to hold
Row device controls the method for flow to realize the continuous-stable control of fluid flow, flow pulse free ingredient.With weightless self-correction
Algorithm carries out aircraft pursuit course amendment, it can be achieved that flow accumulation error levels off to zero.The present invention is mainly by buffer barrel, weighing bucket, into,
Tapping solenoid valve and weight display, intelligent controller and step type electric actuator valve composition.Be when weighing bucket liquid feeding position by
What buffer barrel tapping was completed.Electric Actuator valve outlet flow increases when weighing bucket liquid level rises, and stepping Electric Actuator valve is wanted
Gradually go back to pass.When the decline of weighing bucket liquid level, valve is gradually opened, to keep flow constant.In cycles.Stepping Electric Actuator
Valve returns pass rate and opening rate and weighing bucket liquid weight climbing speed and the flat root of fall off rate are just equal, makes flow control
At a stable straight line.
The metering method of 1~7 pair of steam flow of document is described, and mainly has vortex street and the two kinds of steam of differential pressure
Flowmeter, for the metering of big flow steam, and the function without steam flow control.
Document 8,9,10 weighs to condensed steam using weight method, for the mark to steam-flow meter accuracy
It is fixed, it cannot function as steam-flow meter, it can only be as the caliberating device of steam-flow meter.Document 11 is using weight method to gas flow
It is measured, but without heating system, and the function without automatic control, be not suitable for the automatic control of steam flow.Document 12,
13 are measured or are controlled using flow of the weight method to liquid such as water, but the system is in the environment of opening, and nothing
The function of steam flow control.Document 14,15,16 is counted using flow of the weight method to deep-etching liquid, high-viscosity fluid
Amount, and the automatic control function with flow, but the system is in the environment of opening, is not suitable for the flow of high-temperature steam
Metering and control.
It to sum up narrates, so above-mentioned literature research purpose and scheme be not identical.
Summary of the invention
The technical problem to be solved by the present invention is to poor reliability existing for existing steam-flow meter, low using temperature, no
Suitable for smaller steam flow metering and flow control can not be carried out, and it is an object of the present invention to provide a kind of based on carrying out to steam flow
Evaporation, metering and control method, steam flow is measured by balance weight method, using hand-operated valve to steam flow into
Row control, with good reliability, it is high using temperature, suitable for smaller steam flow metering and steam flow can be controlled
The advantages of processed, can form effective supplement for existing steam-flow meter, solve reliability existing for existing steam-flow meter
Metering that is poor, low using temperature, not being suitable for smaller steam flow and the problem of flow control can not be carried out.
The present invention is achieved through the following technical solutions:
Based on the device for being evaporated, measuring and controlling to steam flow, the heater box including inner hollow, the heating
Be provided with container for evaporation in case, weighing apparatus and display system be installed in heater box, and weighing apparatus simultaneously with container for evaporation and show
Show that system connects, container for evaporation is connected with jet chimney, is connected to inside one end of jet chimney and container for evaporation, and steam pipe
It is provided with shut-off valve on road, and shut-off valve can cut off corresponding jet chimney, control valve is provided on jet chimney, controls
Valve can cut off jet chimney, and control valve is arranged in heater box, handle is provided in heater box, handle is connected with connection machine
Structure, and bindiny mechanism connect with control valve.It is existing to there is the method for carrying out flow measurement using balance weight method, but it is not applicable
In the metering of steam flow, and the function without flow control.This patent calls method in the following text by balance and weighs to container for evaporation,
The steam flow of steam is obtained by the weightlessness in the unit of account time.Aperture by manually controlling valve body connects steam flow
Nearly plan control flow, achievees the purpose that the metering and control of steam flow.The sensor of this control method is electronic balance,
It is not contacted directly with steam, steam, which will not generate electronic balance, corrodes and then influence precision, therefore there is no under control precision
The problem of drop, stability are high.Balance weigh outside heater box, is connect by an one metal wire with container for evaporation, not by evaporation temperature
The influence of degree, therefore evaporating temperature is higher.This method calls method in the following text using balance and weighs to evaporator, and pipeline connection utilizes gold
Belong to corrugated flexible hose, reduces influence of the connecting pipe stress variation to measurement result accuracy, can satisfy small flowmeter amount
Required precision.
Weighing apparatus is electronic balance.In evaporation process, electronic balance the weight change of container for evaporation can be exported to
Display system, electronic balance have lower part scale hook, and range should be greater than the weight summation of container for evaporation and evaporated material.It
It is flat to have data-interface, weight data can be input to display system.
Jet chimney is bellows and metal hard tube, and is connected to inside bellows and container for evaporation, metal hard tube and wave
Line pipe is connected far from one end of container for evaporation.Measurement error mostlys come from the stress variation of connecting pipe in evaporation process, steams
It is connected between hair tank and metal hard tube with corrugated flexible hose, the original very little of the internal stress of corrugated flexible hose, due to evaporator position wave
Corrugated flexible hose stress variation is smaller caused by dynamic, therefore can be to the weight change of evaporator with the presence of corrugated flexible hose
Carry out precise.Steam corrosion corrugated flexible hose causes steam to leak in order to prevent, corrugated flexible hose periodic replacement.
Based on the method for being evaporated, measuring and controlling to steam flow, evaporated material after weighing is placed on evaporation and is held
It in device and is sealed, container for evaporation is placed in heater box, weighing apparatus is mounted at the top of heater box, and container for evaporation passes through gold
Belonging to silk to be connected to keep container for evaporation hanging with weighing apparatus lower part suspension hook, container for evaporation is connect by bellows with metal hard tube,
The range of weighing apparatus is greater than the weight summation of container for evaporation and evaporated material, after being emptied using protection gas to container for evaporation, opens
The time interval dt, dm that read weighing apparatus display numerical value is arranged by display system according to actual needs as in dt in display system
Weighing apparatus shows that the difference of numerical value, display system can show the numerical value i.e. steam flow of dm/dt.Start heater box to hold evaporation
Device, control valve are heated, and set heater box temperature according to the property of evaporated material, in the initial stage, steam flow is not achieved
Plan control flow, with the raising of evaporated material temperature, steam flow is gradually increased, when the flow of evaporated material is up to
Plan control flow, the aperture for manually controlling control valve makes steam flow close to plan control flow, if steam flow is obviously low
Flow is controlled in plan, then the aperture for manually controlling control valve is turned up, until the close setting flow value of steam flow, if steam stream
Amount is apparently higher than plan control flow, then turns down the aperture for manually controlling control valve, until the close plan control stream of steam flow
Amount after evaporation process reaches the predetermined time or evaporated material evaporates substantially, heating container front and back end shut-off valve is closed, is closed
Fall heating system, is cooled down.Steam flow is measured by balance weight method, steam flow is carried out using control valve
Control, with good reliability, it is high using temperature, suitable for smaller steam flow metering and steam flow can be controlled
The advantages of, it is mainly used for the evaporation, metering and control of the steam flow that existing steam-flow meter cannot be completed.By manually controlling
The aperture of valve body makes steam flow close to plan control flow, realizes the purpose of steam flow control.The biography of this control method
Sensor is electronic balance, is not contacted directly with steam, and steam, which will not generate electronic balance, to be corroded and then influence precision, therefore not
There are problems that controlling accuracy decline, stability is high.The electronic balance of weighing passes through a metal outside container for evaporation heater box
Silk is connect with container for evaporation, is not influenced by evaporating temperature, therefore evaporating temperature is higher.This method calls method in the following text to steaming using balance
Hair tank is weighed, and pipeline connection utilizes corrugated flexible hose, reduces connecting pipe stress variation to the shadow of measurement result accuracy
It rings, can satisfy the required precision of small flowmeter amount.
Compared with prior art, the present invention having the following advantages and benefits:
(1) steaming of steam is obtained by carrying out the weightlessness in weighing and unit of account time to the evaporator in evaporation process
Steam flow amount, this method does not block after by steam cooling or corrosion flowmeter is influenced, reliable and stable；
(2) the use temperature of the device is high, can be realized and the flow of 800 DEG C of steam is measured and controlled；
(3) device calls method in the following text using balance and only weighs to evaporator, and pipeline connection utilizes metal bellow, drop
Low influence of the connecting pipe stress variation to measurement result accuracy, the metering suitable for smaller steam flow；
(4) device is able to achieve steam flow by manually controlling the aperture of valve body to control the steam flow of steam
Control.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the flow control experimental result schematic diagram of embodiment 1；
Fig. 3 is the flow control experimental result schematic diagram of embodiment 2.
Label and corresponding parts title in attached drawing:
1- heater box, 2- container for evaporation, 3- shut-off valve, 4- bellows, 5- display system, 6- electronic balance, 7- handle, 8-
Bindiny mechanism, 9- control valve, 10- metal hard tube.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1:
As shown in Figure 1 and Figure 2, to NbCl5Evaporation, metering and the control of steam flow, by the NbCl of 200g5Powder, which is packed into, to be steamed
It sends out in container 2, is placed on electronic balance 6 and weighs after then sealing container for evaporation 2, total weight 9829.08g.It will
Container for evaporation 2 after sealing is mounted in heater box 1, and electronic balance 6 shows that weight is 9846.33g.Using protection gas to evaporation
It after vessel empty, opens display system 5 and flow value is shown, steam flow dm/dt time interval is 5s, NbCl5Flow
Plan control is 0.10g/s.Starting heater box 1 heats container for evaporation 2, control valve 9, is equipped with the heating of container for evaporation
The temperature of case is set in 270 DEG C, and the temperature for being equipped with the heater box of control valve is set in 270 DEG C.Container for evaporation in evaporation process
Weight change and steam flow as shown in Fig. 2, in the initial stage, setting flow is not achieved in steam flow, with evaporated material
The raising of temperature, steam flow gradually increase, and work as NbCl5Flow is i.e. when being up to 0.10g/s, using manually controlling control valve
Aperture transfers in row NbCl5The control of flow；When steam flow is significantly lower than 0.10g/s, the appropriate aperture that control valve is turned up until
Steam flow is close to 0.10g/s；When steam flow is apparently higher than 0.10g/s, the aperture of control valve is suitably turned down, until steam stream
It measures close to 0.10g/s.After evaporating a period of time, NbCl5Substantially it uses up, NbCl5Flow-reduction, by the cut-off of heating container front and back end
Valve is closed, and stops heating container for evaporation and control valve at this time.The display weight of last balance is 9667.86g, is entirely evaporated
The weightlessness of on-line weighing is 178.51g in journey.Completely after cooling, container for evaporation is dismantled, is then placed on balance and is claimed
It weighs, total weight 9653.02g, NbCl in entire evaporation process5It is practical it is weightless be 176.06g, the weightless base with on-line weighing
This is consistent, illustrates that the steam flow of online weighing is accurate.As seen from Figure 2, in NbCl5Steam flow manually controlled
Cheng Zhong, steam flow have a degree of fluctuation, but flowed fluctuation range-controllable, and NbCl can be carried out using this device by saying5
The control of flow.
Embodiment 2:
As shown in Figure 1, Figure 3, to TiCl4Evaporation, metering and the control of steam flow, by the TiCl of 500g4Evaporation is packed into hold
In device, it is placed on electronic balance and weighs after then sealing container for evaporation, total weight 10131.08g.After sealing
Container for evaporation be mounted in heater box, electronic balance show weight be 10147.11g.Container for evaporation is emptied using protection gas
Afterwards, it opens display system to show flow value, steam flow dm/dt time interval is 10s, TiCl4Flow plan control
For 0.15g/s.Starting heater box heats container for evaporation, control valve, and the temperature for being equipped with the heater box of container for evaporation is set
160 DEG C are scheduled on, the temperature for being equipped with the heater box of control valve is set in 160 DEG C.The weight change of container for evaporation in evaporation process
And steam flow, as shown in figure 3, in the initial stage, setting flow is not achieved in steam flow, with the raising of evaporated material temperature,
Steam flow gradually increases, and works as TiCl4When flow reaches 0.15g/s, TiCl is carried out using hand control valve4The control of flow.Such as
Fruit steam flow is significantly lower than 0.15g/s, the appropriate aperture that control valve is turned up, until steam flow is close to 0.15g/s.If steamed
Steam flow amount is apparently higher than 0.15g/s, suitably turns down the aperture of control valve, until steam flow is close to 0.15g/s.Evaporate 60min
Afterwards, heating container front and back end shut-off valve is closed, turns off heating system, is cooled down.The display weight of balance is at this time
9811.52g, the weightlessness of on-line weighing is 335.59g in entire evaporation process.Completely after cooling, container for evaporation is dismantled, then
It is placed on balance and weighs, total weight 9792.14g, TiCl in entire evaporation process4It is practical it is weightless be 338.94g,
It is almost the same with the weightlessness of on-line weighing, illustrate that the steam flow of online weighing is accurate.As seen from Figure 3, in TiCl4It steams
During the manually controlling of steam flow amount, steam flow has a degree of fluctuation, but flowed fluctuation range-controllable, says and utilizes this
Device can carry out TiCl4The control of flow.
Method is called in the following text by balance to weigh to container for evaporation, and the steaming of steam is obtained by the weightlessness in the unit of account time
Steam flow amount, the aperture by manually adjusting control valve control steam flow close to flow set flow, reach steam flow control
Purpose.The present invention is suitable for controlling precision to steam flow and the degree of automation is of less demanding, but needs steam stream quantitative change
Change the place being enable to respond quickly.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (1)
1. based on the method for being evaporated, measuring and controlling to steam flow, it is characterised in that: the substance after weighing to be placed on
It in container for evaporation (2) and is sealed, container for evaporation (2) is placed in heater box (1), weighing apparatus is mounted on heater box (1)
Top, container for evaporation (2) are connected to make container for evaporation (2) vacantly with weighing apparatus lower part suspension hook by wire, container for evaporation
(2) it is connect by bellows (4) with metal hard tube (7), the range of weighing apparatus is greater than the weight of container for evaporation (2) and evaporated material
Summation after being emptied using protection gas to container for evaporation (2), is opened display system (5), passes through display system according to actual needs
(5) setting reads weighing apparatus and shows that the time interval dt, dm of numerical value are the difference that weighing apparatus shows numerical value in dt, display system
(5) the numerical value i.e. steam flow of dm/dt can be shown, starting heater box (1) adds container for evaporation (2), control valve (9)
Heat sets heater box (1) temperature according to the property of evaporated material, and in the initial stage, plan control flow is not achieved in steam flow,
With the raising of evaporated material temperature, steam flow is gradually increased, and controls flow when the flow of evaporated material is up to plan,
The aperture for manually controlling control valve (9) makes steam flow close to plan control flow, if steam flow is significantly lower than plan control
The aperture for manually controlling control valve (9) is then turned up in flow, until the close setting flow value of steam flow, if steam flow is obvious
Flow is controlled higher than plan, then turns down the aperture for manually controlling control valve (9), until the close plan control flow of steam flow,
After evaporation process reaches the predetermined time or evaporated material evaporates substantially, heating container front and back end shut-off valve (3) is closed, is closed
Fall heating system, is cooled down.
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| CN111830865B (en) * | 2020-06-19 | 2024-04-09 | 广东美的厨房电器制造有限公司 | Cooking appliance, control method, and computer-readable storage medium |
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