CN109857171A - A kind of adaptive temperature control device of multizone applied to esterification - Google Patents
A kind of adaptive temperature control device of multizone applied to esterification Download PDFInfo
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- CN109857171A CN109857171A CN201711234649.XA CN201711234649A CN109857171A CN 109857171 A CN109857171 A CN 109857171A CN 201711234649 A CN201711234649 A CN 201711234649A CN 109857171 A CN109857171 A CN 109857171A
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- heating wire
- mcu
- temperature
- esterification
- control device
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Abstract
The present invention relates to a kind of adaptive temperature control devices of the multizone applied to esterification, including temperature sampling module to connect MCU, and for acquiring the temperature of tubular reactor vessel and heating wire, feedback arrives MCU；Current sampling module connects MCU, and for acquiring the electric current of heating wire, feedback arrives MCU；Voltage sample module connects MCU, and for acquiring the voltage of heating wire, feedback arrives MCU；Driving switch circuit module connects MCU and controls the on-off of heating wire for receiving the control signal of MCU.The reactive material type and characteristic that the present invention is provided according to display input module, the reactive material temperature and heating wire temperature obtained in conjunction with sampling prejudges temperature changing trend in tubular reactor vessel, and then it is controlled by off operating mode of the driving switch circuit module to heating wire, realize temperature plateau transition in tube furnace reaction vessel, reach and precisely quickly controls temperature, it is evenly heated, improves the purpose of esterification efficiency.
Description
Technical field
The present invention relates to esterification temperature control field, specifically a kind of multizone applied to esterification is adaptive
Temperature control device.
Background technique
Esterification is a kind of organic chemical reactions that alcohol or alkene and carboxylic acid or oxygen-containing inorganic acid generate esters and water,
Product Ester is a kind of important fine chemical product, is widely used in fragrance, daily use chemicals, food, medicine, rubber, painting
The industries such as material.During producing esters product, reaction temperature plays a crucial role esterification, control
Accuracy and uniformity can all directly influence the stabilization of the conversion ratio of reaction and the selectivity of esterification products and catalyst
Property.And then influence the yield and catalyst life of esters product.
At present applied to the temperature control device of esterification has the disadvantage that one, temperature distribution is non-uniform, pipe reaction furnace
There are the temperature difference for interior different location；Two, temperature control fluctuation is larger.Since esterification is exothermic reaction, discharged in reaction process
Heat make local temperature in reactor excessively high so that reaction bed temperature fluctuation it is larger, to catalysis reaction generate it is unfavorable
It influences.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of adaptive temperature control dress of the multizone applied to esterification
It sets, realizes the smooth transition of temperature in esterifier, reach accurate equal control esterification reaction temperature, improve esterification effect
The purpose of rate.
Present invention technical solution used for the above purpose is:
A kind of adaptive temperature control device of multizone applied to esterification, including
Temperature sampling module connects MCU, and for acquiring the temperature of tubular reactor vessel and heating wire, feedback arrives MCU；
Current sampling module connects MCU, and for acquiring the electric current of heating wire, feedback arrives MCU；
Voltage sample module connects MCU, and for acquiring the voltage of heating wire, feedback arrives MCU；
Driving switch circuit module connects MCU for receiving the control signal of MCU and controls the on-off of heating wire.
The temperature sampling module includes 6 groups of K-type thermocouples and signal conditioning circuit, every group of acquisition K-type thermocouple and letter
Number temperature of a part of tubular reactor vessel of conditioning circuit or the temperature of one section of independent heating wire.
The current sampling module includes 3 groups of current transformers and signal conditioning circuit, every group of current transformer and signal
Conditioning circuit acquires the electric current of one section of independent heating wire.
The voltage sample module includes 3 groups of voltage transformers and signal conditioning circuit, every group of voltage transformer and signal
Conditioning circuit acquires the voltage of one section of independent heating wire.
The signal conditioning circuit is made of operational amplifier and photoelectric coupled circuit.
Power module includes transformer rectifier circuit, filter circuit and Switching Power Supply, connects MCU, is powered for device.
The heating wire is to use direct current as the heating wire of three sections of independent controls of power supply.
The invention has the following beneficial effects and advantage:
The temperature signal that the K-type thermocouple that the present invention uses can will test is converted to voltage signal, through signal condition
MCU (microcontroller) accessible voltage signal is adjusted to after circuit, MCU (microcontroller) is provided according to display input module
Reactive material type and characteristic, the reactive material temperature and heating wire temperature obtained in conjunction with sampling is to temperature in tubular reactor vessel
Variation tendency is prejudged, and then is controlled by off operating mode of the driving switch circuit module to heating wire, realizes tubular type
Temperature plateau transition in furnace reaction vessel reaches precisely quickly control temperature, is evenly heated, improves the mesh of esterification efficiency
's.
Detailed description of the invention
Fig. 1 is hardware structure diagram of the invention；
Fig. 2 is flow chart of the method for the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and embodiments.
It is as shown in Figure 1 hardware structure diagram of the invention.
A kind of adaptive temperature control device of multizone applied to esterification of the invention, including MCU (microcontroller) mould
Block, temperature sampling module, current sampling module, voltage sample module, driving switch circuit module show input module and power supply
Module；It is characterized in that the temperature sampling module is used to acquire the temperature of tubular reactor and heating wire；The electric heating
Silk is to use direct current as the heating wire of three sections of independent controls of power supply；The current sampling module and voltage sample module
It is connect with heating wire, for acquiring the electric current and voltage of heating wire；MCU (microcontroller) provides anti-according to display input module
Substance classes and characteristic are answered, the reactive material temperature and heating wire temperature obtained in conjunction with sampling becomes temperature in tubular reactor vessel
Change trend is prejudged, and is controlled by off operating mode of the driving switch circuit module to heating wire.
MCU (microcontroller) is dsPIC33F single-chip microcontroller, with temperature sampling module, current sampling module, voltage sample mould
Block, driving switch circuit module, power module, display input module connection.
Temperature sampling module includes 6 groups of K-type thermocouples and signal conditioning circuit, acquires 3 part tubular reactor vessels respectively
Temperature and three sections of independent heating wire temperature；The current sampling module includes 3 groups of current transformers and signal condition
Circuit acquires the electric current of three sections of independent heating wire respectively；The voltage sample module includes 3 groups of voltage transformers and signal
Conditioning circuit acquires the voltage of three sections of independent heating wire respectively；The signal conditioning circuit is by operational amplifier and optocoupler
Circuit composition.
Driving switch circuit module is connect with heating wire and MCU (microcontroller) module, including switch mosfet pipe and its
Driving circuit.MCU (microcontroller) controls the on-off of MOSFET pipe by driving circuit, realizes the on-off control of heating wire.
Power module includes transformer rectifier circuit, filter circuit and Switching Power Supply；, power module pass through rectifier transformer filter
Needed for high voltage direct current needed for industrial-frequency alternating current is converted into heating wire by circuit and Switching Power Supply and MCU (microcontroller) etc.
All kinds of direct currents.
The display input module is touch screen and its peripheral circuit.The used 12V DC power supply of touch screen utilizes
RS232 interface and MCU (microcontroller), which are realized, to be communicated, and the function that instruction input and parameter are shown is completed.
It is illustrated in figure 2 flow chart of the method for the present invention.
The present invention displays for a user out several common esterification substances first on startup and is matched on Touch Screen
Than for selection and setting, if real reaction substance is common classification, system automatically estimates required heating temperature, such as
If not, user can voluntarily be configured heating temperature.Before heating starts, system can be heated to target temperature to reactive material
Institute's calorific requirement is estimated, after the completion of estimation, it is anti-to tubular type that MCU (microcontroller) control switch pipe is respectively turned on three sections of heating wire
Capsule contents are answered to be heated, and during heating by each group temperature sampling module, current sampling module and voltage
The data that sampling module collects are analyzed, and constantly amendment estimates heating amount and judges whether each group heating wire stops respectively
Heating stops heating and to wait heating wire to be cooled to identical as temperature in reaction vessel when heating amount, which reaches, estimates heating amount,
Heating wire discharges waste heat and further heats to container during this period, eliminates electric-heating-wire-heating hysteresis quality in reaction vessel
The influence of temperature, the thermal accumlation in container before reducing esterification heat release, and then reach temperature plateau mistake in reaction vessel
The purpose crossed.Due to the inside temperature of heating wire and real-time monitoring reaction vessel that the present invention is controlled using three sections by HF switch
Degree, therefore heating wire temperature and reaction vessel interior temperature can be made close to consistent, when temperature is lower than set temperature in container can and
When heated by way of improving heating wire turn-on time, and then reach and be evenly heated, the purpose of accurate temperature controlling.
Claims (7)
1. a kind of adaptive temperature control device of multizone applied to esterification, it is characterised in that: including
Temperature sampling module connects MCU, and for acquiring the temperature of tubular reactor vessel and heating wire, feedback arrives MCU；
Current sampling module connects MCU, and for acquiring the electric current of heating wire, feedback arrives MCU；
Voltage sample module connects MCU, and for acquiring the voltage of heating wire, feedback arrives MCU；
Driving switch circuit module connects MCU for receiving the control signal of MCU and controls the on-off of heating wire.
2. the adaptive temperature control device of the multizone according to claim 1 applied to esterification, it is characterised in that: described
Temperature sampling module includes 6 groups of K-type thermocouples and signal conditioning circuit, every group of acquisition K-type thermocouple and signal conditioning circuit one
The temperature of the temperature of part tubular reactor vessel or one section of independent heating wire.
3. the adaptive temperature control device of the multizone according to claim 1 applied to esterification, it is characterised in that: described
Current sampling module includes 3 groups of current transformers and signal conditioning circuit, and every group of current transformer and signal conditioning circuit acquire
The electric current of one section of independent heating wire.
4. the adaptive temperature control device of the multizone according to claim 1 applied to esterification, it is characterised in that: described
Voltage sample module includes 3 groups of voltage transformers and signal conditioning circuit, and every group of voltage transformer and signal conditioning circuit acquire
The voltage of one section of independent heating wire.
5. according to the adaptive temperature control device of the described in any item multizones applied to esterification of claim 2~4, feature
Be: the signal conditioning circuit is made of operational amplifier and photoelectric coupled circuit.
6. the adaptive temperature control device of the multizone according to claim 1 applied to esterification, it is characterised in that: power supply
Module includes transformer rectifier circuit, filter circuit and Switching Power Supply, connects MCU, is powered for device.
7. the adaptive temperature control device of the multizone according to claim 1 applied to esterification, it is characterised in that: described
Heating wire is to use direct current as the heating wire of three sections of independent controls of power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711234649.XA CN109857171A (en) | 2017-11-30 | 2017-11-30 | A kind of adaptive temperature control device of multizone applied to esterification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711234649.XA CN109857171A (en) | 2017-11-30 | 2017-11-30 | A kind of adaptive temperature control device of multizone applied to esterification |
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| Publication Number | Publication Date |
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| CN109857171A true CN109857171A (en) | 2019-06-07 |
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| CN201711234649.XA Pending CN109857171A (en) | 2017-11-30 | 2017-11-30 | A kind of adaptive temperature control device of multizone applied to esterification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114153246A (en) * | 2021-11-19 | 2022-03-08 | 厦门海洋芯科技有限公司 | Temperature control system and control method |
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| CN202570165U (en) * | 2012-05-15 | 2012-12-05 | 宜兴市通达化学有限公司 | Reaction kettle for esterification |
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|---|---|---|---|---|
| CN2109249U (en) * | 1992-01-29 | 1992-07-08 | 华东工学院 | Inter-heating type glass chemical reactor |
| US6935572B1 (en) * | 2004-11-02 | 2005-08-30 | Lewis T. Smole | Temperature differential eliminator |
| CN102165099A (en) * | 2008-07-23 | 2011-08-24 | 爱恩邦德(瑞士奥尔顿)有限公司 | Chemical vapor deposition reactor for depositing layers made of a reaction gas mixture onto workpieces |
| CN202570165U (en) * | 2012-05-15 | 2012-12-05 | 宜兴市通达化学有限公司 | Reaction kettle for esterification |
| CN104628059A (en) * | 2015-02-04 | 2015-05-20 | 总装备部工程设计研究总院 | Continuous device for gasifying unsymmetrical dimethylhydrazine waste liquid with supercritical water |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114153246A (en) * | 2021-11-19 | 2022-03-08 | 厦门海洋芯科技有限公司 | Temperature control system and control method |
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Application publication date: 20190607 |
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