CN106093112A - The device of multiple heating function is realized in calorimetry apparatus - Google Patents
The device of multiple heating function is realized in calorimetry apparatus Download PDFInfo
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- CN106093112A CN106093112A CN201610580385.2A CN201610580385A CN106093112A CN 106093112 A CN106093112 A CN 106093112A CN 201610580385 A CN201610580385 A CN 201610580385A CN 106093112 A CN106093112 A CN 106093112A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The present invention relates to a kind of device realizing multiple heating function in calorimetry apparatus, mainly solve the less problem of heating mode in prior art.The present invention, by using a kind of device realizing multiple heating function in calorimetry apparatus, preferably solves the problems referred to above including heating unit, heat-insulation unit, electric power controller, intelligent temperature controller, the technical scheme of reaction tank, can be used in calorimetry apparatus.
Description
Technical field
The present invention relates to a kind of device realizing multiple heating function in calorimetry apparatus.
Background technology
The hot blast of one concrete reaction danger is evaluated, need to obtain initial exothermic temperature, rate of heat release, thermal discharge,
The parameters such as the change of overall process temperature and pressure, SADT, and the acquisition of these parameters must throughput Thermal test.Often
Mainly include with calorimetry apparatus reacting the adiabatic calorimetry instrument (Accelerating such as calorimeter (RC1), accelerating calorimeter (ARC)
Rate Calorimeter and Method of Operation, US4208907), differential scanning calorimeter (DSC) etc..Pin
Different samples and reaction to be obtained different test data, needs calorimeter that sample and reaction are carried out different intensifications and swept
Retouch.
The operational mode of calorimeter is varied, including quickly scanning, adiabatic model, isothermal scanning etc..Quickly scanning is
At the uniform velocity heat up until exothermic reaction starts, be the basic screening mode of chemical producting safety.Isothermal scanning is to control heater to make
Sample is in certain steady temperature, eliminates temperature effects, directly obtains the information such as conversion ratio of reaction.Chemical processes safety is evaluated
In calorimetric pattern the most frequently used, that can reflect reactivity hazard be adiabatic model, it is that to measure chemistry under a kind of adiabatci condition anti-
The method answering process, can effectively measure the initial reaction temperature in chemical reaction process, overall process pressure, temperature variation, arrival
The time etc. of maximum reaction rate.
Adiabatic model is closer to reaction pattern during actual condition thermal runaway often, therefore uses adiabatic model to survey
The data gone out are more applicable for simulated condition.For calorimetric instrument, the implementation of adiabatic model typically has two kinds: a kind of
It is that another kind is then continuous adjustment ring by arranging being thermally isolated of the heat-barrier material of heat-conductive characteristic extreme difference reinforcement system and surrounding
Border temperature, is allowed to be always maintained at system temperature consistent, eliminates heat exchange therebetween.Heater described in the present invention
It is namely based on the principle of this " temperature-compensating ".Whole heater comprises heating and insulation two parts, retouches its heating process
Stating as follows: reaction system be placed in heater, bring into operation " heating-wait-search " pattern, first heating unit heats
Material is to assigned temperature, and then heating unit quits work, and enables heat-insulation unit and remains temperature-resistant, waits for a period of time and search
Rope whether heat release (temperature rise rate is more than certain value), if can't detect heat release in the process waited, then continues to rise a high-temperature, enters
Enter next step；If be detected that system temperature rises, then control ambient temperature and rise therewith, with the heat preventing system from releasing
Amount is dispersed in environment.Thermal insulation is realized, it is desirable to heater has good heating function and temperature is followed the tracks of by this kind of mode
Function, this is closely related with the design of heater.The heater of calorimetry apparatus is most important for the accuracy of experimental result.
The sample cell that different calorimetry apparatus uses is different, and the size of sample cell, shape, material are not quite similar, and add hot charging
The shape put is the most different.For three kinds of heating modes, also require that heater has several functions.
Summary of the invention
The technical problem to be solved is the less problem of heating mode in prior art, it is provided that a kind of new
Calorimetry apparatus realizes the device of multiple heating function.This device has the advantage that heating mode is more.
For solving the problems referred to above, the technical solution used in the present invention is as follows: one realizes multiple heating in calorimetry apparatus
The device of function, described device includes heating unit, heat-insulation unit, electric power controller, intelligent temperature controller, reaction tank, described in add
Hot cell, heat-insulation unit all include resistance wire or heating rod, holding power controller and h eating power controller respectively with insulation
Unit, heating unit are connected；Intelligent temperature controller includes being incubated PID (abbreviation that ratio, integration, differential control) and heating PID, with
Electric power controller co-ordination, provides multiple heating modes to reaction intracisternal material, both can set and add thermal output, it is achieved
Quickly scanning and isothermal pattern, can set again heating schedule and realize adiabatic model, makes heat-insulation unit according to reaction intracisternal material
Temperature is tracked, it is desirable to error is in 1 DEG C；Heating PID is connected with the heat pipe-thermocouple that adds on reaction tank, insulation PID and reaction
Heat preservation hot galvanic couple on pond is connected, and is provided with chassis heater bottom reaction tank, and chassis heater height reaches reaction tank height
1/5—1/3；Insulation material is filled between reaction pool wall and heat-insulation unit；Or, heating is merged with heat insulation function, instead
Ying Chi is outside places a metal shell, and metal shell bottom provides heating function, and periphery provides heat insulation function, it is achieved to whole
The three-dimensional parcel of reaction tank, heating function and temperature tracking function the most thus metal shell realize.
In technique scheme, it is preferable that electric power controller selects electromagnetic relay and solid-state relay.
In technique scheme, it is preferable that electric power controller is silicon controlled solid-state relay, control model selects phase place
Pattern, fixed cycle zero passage adjustment type, variable period zero passage adjustment type.
In technique scheme, it is highly preferred that control model selects phase control mode.
In technique scheme, it is preferable that intelligent temperature controller is external or is directly incorporated into calorimeter by communication module
Central control system.
In technique scheme, it is preferable that insulation material is heat-preservation cotton.
The invention provides a kind of method being applicable to the heating of calorimetric instrument reaction tank, be engaged in Chemical Manufacture, chemical industry safety
Research and the R&D institution of Chemical Engineering Design and enterprise have certain demand to the inventive method, and the present invention is in the enterprise of Chemical Manufacture
Industry, chemical industry security study and Chemical Engineering Design R&D institution there is suitable application and popularization value.Compared with prior art, the present invention
Can require to run different heating mode according to specifying, Applicable temperature is room temperature～800 DEG C and can tolerate this temperature for a long time, real
Measurement requirement under existing various modes, achieves preferable technique effect.
Accompanying drawing explanation
Fig. 1 is heater overall structure schematic diagram.
In Fig. 1,1-heat-insulation layer 2-reaction pool wall 3-Heat preservation silk 4-chassis heater 5-heat preservation hot galvanic couple 6-adds
Heat pipe-thermocouple 7-input value 8-heating PID 9-insulation PID 10-insulation controllable silicon electric power controller 11-heating controllable silicon electricity
Force controller.
Fig. 2 is the heating unit structure figure that heating separates with insulating sections.
In Fig. 2, the heater strip 4-chassis heater that 1-heat-insulation layer 2-reaction pool wall 3-heat-insulation unit is wound around.
Fig. 3 is heating and thermal insulation integral type heating unit structure figure.
In Fig. 3,1-heat-insulation layer 2-reacts pool wall 3-metal shell heater.
Fig. 4 is Temperature-time change curve in residual hydrogenation course of reaction in embodiment 1.
Fig. 5 is to use " quickly scanning " pattern to measure preparation EVOH resin reaction runaway temperature-time change in embodiment 2
Curve.
Fig. 6 is to use " heating-wait-search " measurement preparation EVOH resin reaction runaway temperature-time to become in embodiment 2
Change curve.
Below by embodiment, the invention will be further elaborated, but is not limited only to the present embodiment.
Detailed description of the invention
[embodiment 1]
The present invention provides a kind of heating means that disclosure satisfy that three kinds of heating modes, as it is shown in figure 1, disclosure satisfy that not Tongan City
The requirement of full evaluation test.
1) this experimental provision mainly comprises the following steps:
Heating unit: heating unit is mainly made up of the resistance wire or heating rod with certain resistance, according to material, reaction
Pool structure position relative with heat-insulation unit and structure can have multiple choices.
Heat-insulation unit: heat-insulation unit is mainly made up of the resistance wire or heating rod with certain resistance, and heat-insulation unit is general
Make according to reaction tank contour structures, between reaction tank and heat-insulation unit, fill certain thickness heat-preservation cotton.According to material, reaction
Pool structure position relative with heat-insulation unit and structure can have multiple choices.
Electric power controller: electric power controller is related to precision and the service life of heater, can select electromagnetism relay
Device and solid-state relay, be preferably based on silicon controlled solid-state relay, and control model can select phase pattern, fixed cycle zero passage
Adjustment type, variable period zero passage adjustment type, preferably phase control mode.
Intelligent temperature controller: with electric power controller co-ordination, provide multiple adding according to requirement of experiment to reaction intracisternal material
Heat pattern.Both can set and add thermal output, it is achieved quickly scanning and isothermal pattern；Heating schedule can be set again realize absolutely
Heat pattern, makes heat-insulation unit be tracked according to mass temperature in reaction tank, it is desirable to error is in 1 DEG C.Intelligent temperature controller is permissible
Be external can also be the central control system being directly incorporated into calorimeter by communication module.
2) heating unit and the detailed description of heat insulation unit structure to this experimental provision
Different according to reaction tank structure, heating unit and heat-insulation unit can be fabricated to the size of different shape sums, can
With but be not limited to cylinder, spherical etc., it is desirable to made heater profile meets corresponding reaction tank profile, to provide essence
Quasi-heating.As a example by 100ml cylindrical reaction cell, two kinds of structures of heater are described:
A () heating unit is coiled into bottom reaction tank and adds hot plate, it is desirable to highly reach the 1/5 1/3 of reaction tank height, uses
In the heating to reaction tank；Heat-insulation unit is shaped to the shape more bigger than reaction tank according to reaction tank, it is desirable to Warm keeping sheet
Just certain thickness can be filled, such as the insulation material of about 0.2cm between unit and reaction tank.See Fig. 1.Wherein, insulation material
It can be heat-preservation cotton.Heater strip can be directly wound in outside insulation material, it is also possible to is wrapped in and can be fitted tightly over heat-insulation layer
On cylindrical metal thin layer on.
B heating is merged by () with heat insulation function, place a metal shell outside reaction tank, and metal shell bottom provides
Heating function, periphery provides heat insulation function, it is achieved the three-dimensional parcel to whole reaction tank, heating function and temperature tracking function are complete
Complete thus metal shell realizes, and sees Fig. 2.
3) using method of this device is:
Solid and liquid reactants join inside reaction tank by the opening on reaction tank, then by bolt card sleeve
Dead reaction tank.Reaction tank is put in heater, and reaction tank loads insulation material with heat-insulation unit.Measure feedback response thing temperature
Thermocouple insertion reaction pond inside, measure feedback environment temperature thermocouple insertion reaction pond and heat-insulation unit between insulation
In cotton.According to different heating mode requirement in intelligent temperature controller or central control system, arranging heating schedule, record is anti-simultaneously
Temperature and variation of ambient temperature in Ying Chi.
Utilize on VSP2, on this heater, carry out residual hydrogenation response magnitude Thermal test
Experimental procedure:
(1) preheating residual oil, makes it flowing, adds in reaction tank；According to oil preparation than weighing the amount of catalyst and adding anti-
Ying Chizhong；
(2) installing heater, put into by reaction tank in heater, reaction tank loads heat-preservation cotton with heat-insulation unit, connects
Feeding line and will measure feedback response thing temperature thermocouple insertion reaction pond inside, measure feedback environment temperature thermocouple
In heat-preservation cotton between insertion reaction pond and heat-insulation unit；Glass is filled up in space between whole heater and autoclave
Cotton, covers kettle cover, sealing autoclave；
(3) by table test lead connection state and insulating properties, start VSP system and temperature, piezometry system are entered
Row correction；
(4) open the electromagnetic valve on vacuum pipeline, start vacuum pump, pressure in autoclave is evacuated to-0.09MPa (g) with
Keep ten minutes after Xia, the air-tightness of trial inspection system；
(5) open gas cylinder valve, it is ensured that air supply system can provide the gas that pressure is more than 10MPa, open pressure automatic
Tracking system；Feeding line accesses hydrogen cylinder, squeezes into hydrogen in reaction tank；Keep ten minutes, check that system is airtight further
Property；
(6) start intelligent temperature control system, select adiabatic model according to requirement of experiment, set heating schedule.Start cooling system
System is to protect pressure transducer.When temperature reaches 150 DEG C, start super magnetic stirring apparatus；
(7) observation experiment pressure, variations in temperature, record experimental phenomena is until experiment terminates；
(8) open autoclave, take out reactor, it is carried out, purges；
(9) derive experimental data, analyze experimental result, as shown in Figure 4.
Interpretation: changed over by Fig. 4 temperature it can be seen that system heat release, system detected when 370 DEG C
Entering adiabatic model, final system is warming up to 397 DEG C.Reaction tank temperature occurs that the reason of so change is to occur when 370 DEG C
Hydrogenation reaction, has heat to release, thus heat release detected；Beginning with mild heat cracking reaction after 384 DEG C, endothermic heat of reaction is simultaneously
Produce with small molecule hydrocarbon class；When 397 DEG C, heat absorption and heat release reach balance.Hereafter continuation liter high-temperature is to 430 DEG C, does not has
Detect obvious heat release.
[embodiment 2]
This unit simulation azodiisobutyronitrile Dichlorodiphenyl Acetate ethylene, ethylene, methanol system is utilized to prepare EVOH resin reaction peace
The impact of full property.
Experimental procedure:
(1) according to charge proportion and reaction tank volumetric efficiency, vinyl acetate and methanol are added；
(2) installing heater, put into by reaction tank in heater, reaction tank loads heat-preservation cotton with heat-insulation unit, connects
Feeding line and will measure feedback response thing temperature thermocouple insertion reaction pond inside, measure feedback environment temperature thermocouple
In heat-preservation cotton between insertion reaction pond and heat-insulation unit；Glass is filled up in space between whole heater and autoclave
Cotton, covers kettle cover, sealing autoclave；
(3) by table test lead connection state and insulating properties, start VSP system and temperature, piezometry system are entered
Row correction；
(4) open the electromagnetic valve on vacuum pipeline, start vacuum pump, pressure in autoclave is evacuated to-0.09MPa (g) with
Keep ten minutes after Xia, the air-tightness of trial inspection system；
(5) open gas cylinder valve, it is ensured that air supply system can provide the gas that pressure is more than 10MPa, open pressure automatic
Tracking system；Feeding line accesses ethylene bottle, squeezes into ethylene to reacting initial pressure in reaction tank；Keep ten minutes, enter one
Step inspection system air-tightness；
(6) start intelligent temperature control system, select heating mode according to requirement of experiment, set heating schedule.Start cooling system
System is to protect pressure transducer.
(7) observation experiment pressure, variations in temperature, record experimental phenomena is until experiment terminates；
(8) open autoclave, take out reactor, it is carried out, purges；
(9) derive experimental data, analyze experimental result.
1, quickly scan
Ethylene initial pressure is 4.0MPa, and room temperature 30 DEG C at the uniform velocity heats up, until runaway reaction, reaction result is as shown in Figure 5.
Reaction system temperature curve slope after 100 DEG C strengthens, and obvious runaway reaction process occurs through after a while,
The maximum temperature of reaction system reaches 164.1 DEG C
2, under room temperature, " heating-wait-search " is the most out of control
Under the conditions of ethylene initial pressure is 3.6MPa, under room temperature, " heating-wait-search " is to out of control, reaction result such as Fig. 6
Shown in.
Reaction system detects heat release at 88.0 DEG C, occurs obvious runaway reaction feature, reaction system in exothermic process
Maximum temperature reach 215 DEG C.
Utilize the first quickly scanning mould examination, reaction or the decomposition caused heat release temperature of certain material can be rapidly be, determine
Its runaway reaction probable ranges.This kind of heating mode may be used for quickly scanning, screening sample, assigning degrees of hazard.The second
" " can accurately draw the runaway temperature point of system, this is for controlling reaction temperature or the preservation of material in heating-wait-search
Temperature is significant.
Claims (6)
1. realizing a device for multiple heating function in calorimetry apparatus, described device includes heating unit, heat-insulation unit, electricity
Force controller, intelligent temperature controller, reaction tank, described heating unit, heat-insulation unit all include resistance wire or heating rod, holding power
Controller is connected with heat-insulation unit, heating unit respectively with h eating power controller；Intelligent temperature controller includes being incubated PID and heating
PID, with electric power controller co-ordination, provides multiple heating modes to reaction intracisternal material, both can set heating output work
Rate, it is achieved quickly scanning and isothermal pattern, can set again heating schedule and realize adiabatic model, make heat-insulation unit according to reaction tank
Interior mass temperature is tracked, it is desirable to error is in 1 DEG C；Heating PID is connected with the heat pipe-thermocouple that adds on reaction tank, is incubated PID
Being connected with the heat preservation hot galvanic couple on reaction tank, be provided with chassis heater bottom reaction tank, chassis heater height reaches reaction tank
The 1/5 1/3 of height；Insulation material is filled between reaction pool wall and heat-insulation unit；Or, will heating and heat insulation function conjunction
And, outside reaction tank, place a metal shell, metal shell bottom provides heating function, and periphery provides heat insulation function, real
The now three-dimensional parcel to whole reaction tank, heating function and temperature tracking function the most thus metal shell realize.
The device of multiple heating function is realized the most according to claim 1, it is characterised in that Electric control in calorimetry apparatus
Device selects electromagnetic relay and solid-state relay.
The device of multiple heating function is realized the most according to claim 2, it is characterised in that Electric control in calorimetry apparatus
Device is silicon controlled solid-state relay, and control model selects phase pattern, fixed cycle zero passage adjustment type, variable period to cross zero adjustment
Type.
The device of multiple heating function is realized the most according to claim 3, it is characterised in that control model in calorimetry apparatus
Select phase control mode.
The device of multiple heating function is realized the most according to claim 1, it is characterised in that intelligent temperature control in calorimetry apparatus
Device is external or be directly incorporated into calorimeter by communication module central control system.
The device of multiple heating function is realized the most according to claim 1, it is characterised in that insulation material in calorimetry apparatus
For heat-preservation cotton.
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| CN201610580385.2A CN106093112A (en) | 2016-07-22 | 2016-07-22 | The device of multiple heating function is realized in calorimetry apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109556929A (en) * | 2018-10-18 | 2019-04-02 | 广州安必平医药科技股份有限公司 | Reaction warehouse, antigen retrieval instrument and its application method |
| CN112255260A (en) * | 2020-10-19 | 2021-01-22 | 南京理工大学 | Test device for testing thermal stability of substance under constant pressure state |
| CN112255259A (en) * | 2020-10-19 | 2021-01-22 | 南京理工大学 | Test method for testing thermal stability of substance under constant pressure state |
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| CN109556929A (en) * | 2018-10-18 | 2019-04-02 | 广州安必平医药科技股份有限公司 | Reaction warehouse, antigen retrieval instrument and its application method |
| CN112255260A (en) * | 2020-10-19 | 2021-01-22 | 南京理工大学 | Test device for testing thermal stability of substance under constant pressure state |
| CN112255259A (en) * | 2020-10-19 | 2021-01-22 | 南京理工大学 | Test method for testing thermal stability of substance under constant pressure state |
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