CN108681348A - A kind of chemical industry melting tower intelligent temperature control system - Google Patents
A kind of chemical industry melting tower intelligent temperature control system Download PDFInfo
- Publication number
- CN108681348A CN108681348A CN201810891525.7A CN201810891525A CN108681348A CN 108681348 A CN108681348 A CN 108681348A CN 201810891525 A CN201810891525 A CN 201810891525A CN 108681348 A CN108681348 A CN 108681348A
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- China
- Prior art keywords
- sweating
- circulating pump
- tower
- conduction oil
- pneumatic operated
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002844 melting Methods 0.000 title claims abstract description 18
- 230000008018 melting Effects 0.000 title claims abstract description 18
- 239000000126 substance Substances 0.000 title claims abstract description 14
- 230000035900 sweating Effects 0.000 claims abstract description 29
- 238000002425 crystallisation Methods 0.000 claims abstract description 24
- 230000008025 crystallization Effects 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 230000008016 vaporization Effects 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002253 acid Substances 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 239000013078 crystal Substances 0.000 claims abstract description 8
- 239000000155 melt Substances 0.000 claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims abstract description 5
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 abstract description 20
- 239000005711 Benzoic acid Substances 0.000 abstract description 10
- 235000010233 benzoic acid Nutrition 0.000 abstract description 10
- 238000010309 melting process Methods 0.000 abstract description 8
- 238000000746 purification Methods 0.000 abstract description 8
- 208000008454 Hyperhidrosis Diseases 0.000 description 21
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 210000004243 sweat Anatomy 0.000 description 2
- 241000009298 Trigla lyra Species 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
Abstract
The invention provides a kind of chemical industry melting tower intelligent temperature control system, including melting tower and PLC control cabinet, and acid circulating pump is equipped on the feed pipe connected on melting tower；It melts and is equipped with heat conduction oil circulating pump in the heat conduction oil circuit piping of tower connection, parallel connection is equipped with heating and vaporizing device and cooling device, and sweating pneumatic operated valve and sweating ratio adjusting valve are equipped in the heat supplying pipeline of heating and vaporizing device；Crystallization pneumatic operated valve is equipped in the cold water outlet pipeline of equipment of crystallisation by cooling；It is communicated with industrial steam escape pipe on heating and vaporizing device, cooling water circulating pump is connected in the cold water supplying pipe road of cooling device；Acid circulating pump, heat conduction oil circulating pump, sweating pneumatic operated valve, sweating ratio adjusting valve, crystallization pneumatic operated valve and crystal area proportion regulating valve are connect with PLC control cabinet.This system is controlled entire melting process using PLC control cabinet, and entire melting process is made to realize the intelligent control of automation, improves the concentration of benzoic acid purification, reduces the input of manpower.
Description
Technical field
The invention belongs to benzoic acid purification intelligent control technology field, and tower intelligence is melted more particularly, to a kind of chemical industry
It can temperature control system.
Background technology
Benzoic acid is that one kind can be medical, can cook preservative, and fixastive can also do chemical intermediate, lubricant, and coating helps
Agent, industrial chemicals that also can be daily.The prior art can pass through crystallization, sweating, the purification of the process progress benzoic acid of melting, crystallization
Process, sweating effort and melting process, which cannot achieve, to be automatically controlled, and it is each during temperature control it is extremely unstable,
Cause the concentration that benzoic acid purifies relatively low.Existing technology can not achieve the automation of melting process.Existing technology is manual
The aperture of control valve goes control temperature.The temperature that each stage needs is different, manually needs to operate different valves to control
The temperature needed during system is each, cumbersome, waste is a large amount of artificial.In addition, crystallization temperature is unstable, lead to temperature
Spend up and down, several degrees Celsius of the temperature difference of temperature and setting.Since the purification of benzoic acid is affected by temperature greatly, purification it is dense
It differs greatly certainly with later before degree.There is an urgent need for improving in the prior art, benzoic acid purification concentration is low, cannot achieve automation
Defect.
Invention content
In view of this, the invention is intended to overcome above-mentioned defect existing in the prior art, a kind of chemical industry melting is proposed
Tower intelligent temperature control system.
In order to achieve the above objectives, the technical solution of the invention is realized in：
A kind of chemical industry melting tower intelligent temperature control system, including melting tower and PLC control cabinet, the charging connected on melting tower
Pipe is equipped with acid circulating pump；It is equipped with heat conduction oil circulating pump in the heat conduction oil circuit piping of the melting tower connection, and in conduction oil
It is in parallel in circulation line to be equipped with heating and vaporizing device and cooling device, it is equipped with sweating in the heat supplying pipeline of the heating and vaporizing device
Pneumatic operated valve, and it is equipped with sweating ratio adjusting valve；Crystallization pneumatic operated valve is equipped in the cold water outlet pipeline of the equipment of crystallisation by cooling, and
Equipped with crystal area proportion regulating valve；Industrial steam escape pipe is communicated on the heating and vaporizing device, the cold water of cooling device supplies water
Cooling water circulating pump is connected in pipeline；The acid circulating pump, heat conduction oil circulating pump, sweating pneumatic operated valve, sweating ratio adjusting valve,
Crystallization pneumatic operated valve and crystal area proportion regulating valve are connect with PLC control cabinet.
Further, cold water outlet pipeline and cold water supplying pipe road are respectively equipped with temperature display meter.
Further, heating and vaporizing device place pipeline is corresponded in the heat conduction oil circuit piping and to cooling device institute
It is equipped with control valve in pipeline.
Further, the conduction oil coming oil direction one in heating and vaporizing device and cooling device is arranged in the heat conductive circulation pump
End.
Further, the PLC control cabinet is equipped with alarm.
Further, the PLC control cabinet is equipped with information display screen.
Compared with the existing technology, the invention has the advantage that：
The invention is controlled entire melting process using PLC control cabinet, and entire melting process is made to realize certainly
The intelligent control of dynamicization, and the temperature control accuracy in crystallization process is high, has reached what permanent slop control temperature declined
It is required that improving the concentration of benzoic acid purification, reduce the input of manpower.
Description of the drawings
The attached drawing for constituting the part of the invention is used for providing further understanding the invention, present invention wound
The illustrative embodiments and their description made do not constitute the improper restriction to the invention for explaining the invention.
In attached drawing：
Fig. 1 is the invention system structure diagram.
Reference sign：
1- melts tower；2- feed pipes；3- acid circulating pumps；4- heat conduction oil circuit pipings；5- heat conduction oil circulating pumps；6- heats vapour
Makeup is set；7- cooling devices；8- sweating pneumatic operated valves；9- sweating ratio adjusting valves；10- crystallizes pneumatic operated valve；11- crystal area proportions are adjusted
Valve；12- industrial steam escape pipes；13- cold water supplying pipes road；14- cold water circulation pumps；15- temperature display meters；16- control valves.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the invention can
To be combined with each other.
In the description of the invention, it is to be understood that term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the invention and simplifies to describe, rather than indicate
Or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot understand
For the limitation to the invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more this feature.In the description of the invention, unless separately
It is described, the meaning of " plurality " is two or more.
In the description of the invention, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning of the term in the invention.
With reference to embodiment come the present invention will be described in detail create.
A kind of chemical industry melting tower intelligent temperature control system, as shown in Figure 1, including melting tower 1 and PLC control cabinet, in melting tower
The feed pipe 2 of upper connection is equipped with acid circulating pump 3；It is followed equipped with conduction oil in the heat conduction oil circuit piping 4 of the melting tower connection
Ring pump 5, and parallel connection is equipped with heating and vaporizing device 6 and cooling device 7 in heat conduction oil circuit piping, the heating and vaporizing device
It is equipped with sweating pneumatic operated valve 8 in heat supplying pipeline, and is equipped with sweating ratio adjusting valve 9；The cold water outlet pipe of the equipment of crystallisation by cooling
It is equipped with crystallization pneumatic operated valve 10 in road, and is equipped with crystal area proportion regulating valve 11；It is communicated with industrial steam on the heating and vaporizing device
Escape pipe 12 is connected with cooling water circulating pump 14 in the cold water supplying pipe road 13 of cooling device；The acid circulating pump, conduction oil follow
Ring pump, sweating pneumatic operated valve, sweating ratio adjusting valve, crystallization pneumatic operated valve and crystal area proportion regulating valve are connect with PLC control cabinet.
In an alternative embodiment, it is aobvious to be respectively equipped with temperature for above-mentioned cold water outlet pipeline and cold water supplying pipe road
Show instrument 15.
Under normal circumstances, the conduction oil coming oil direction in heating and vaporizing device and cooling device is arranged in above-mentioned heat conductive circulation pump
One end.Heating and vaporizing device place pipeline is corresponded in above-mentioned heat conduction oil circuit piping and pipeline where cooling device is all provided with
There is control valve 16, using control valve 16 come control piper break-make.
Above-mentioned PLC control cabinet is equipped with alarm, in general, information display screen can also be equipped in above-mentioned PLC control cabinet.
It should be noted that the aperture that existing technology is hand control valve goes control temperature.What each stage needed
Temperature is different, manually needs to operate different valves to control each temperature needed in the process of control, complicated for operation, Gong Renlao
Momentum is big.Existing production process is as follows：
Temperature will be raised to 125 DEG C or more before first stage crystallization, and sweating pneumatic operated valve needs to close, and to adjust crystallization gas at this time
The aperture of valve is moved to make temperature rise to 125 DEG C.
Second stage drops to 109 DEG C by 125 DEG C and is divided into 10 different stages, and each stage needs or 8,10,13 points
Clock etc. needs 2 hours in total, this process needs manually or fuzzy is realized, but the temperature difference reaches several degrees Celsius, whole
It is inaccurate that a process needs the time to hold.
Sweating stage phase III crystallizes gas sweat pneumatic operated valve at this time, opens sweating pneumatic operated valve, the aperture of hair according to temperature come
It adjusts, generally requires 122 DEG C or so, according to the difference of material, temperature also has difference.
And in the invention, only it need to begin to move by the corresponding button of operation PLC control cabinet, corresponding pneumatic operated valve
Make, sweating pneumatic operated valve can close, and crystallization pneumatic operated valve is opened, and acid circulating pump is started to work.Crystallization regulating valve also begins to run.It can
To enter crystallization process, after the completion of crystallization process, crystallization pneumatic operated valve is closed, and sweating pneumatic operated valve is opened, and crystallization regulating valve is closed, hair
Sweat regulating valve is opened, and acid circulating pump is stopped.Sweating effort is carried out, sweating is completed to continue and melted.
It should be noted that digital display meter and the sensor at scene can be utilized to connect, digital display meter is connect with PLC.Pass through number
Mixing oil temperature when aobvious table is realized to sweating is dynamically controlled, and the temperature control of permanent slope is realized, specifically, digital display
The concrete model of table：Xiamen space electricity AI-719P type precision Artificial intelligence industry regulators, wherein：
The module of selection：AI-719P A I4 X3 L3 I2
AI-719P increases by 50 sections of time control functions on the basis of AI-719
A panels 96*96mm
I4 auxiliary input installation modules (4~20mA24V of analog quantity power supplys are for two-wire system transformer use)
The main output installation modules (the programmable current output module of Phototube Coupling) of X3
L3 alarm installation modules (two-way large volume relay normally open contact)
I2 on-off model input interfaces can be used for external switch contact or frequency signal input
In general, the connection of digital display meter can be：220V AC power supplies is powered to digital display meter, the access of auxiliary input module contact
Sensor signal, I2 modules are connect with PLC, and output module is connect with live pneumatic operated valve.It is defeated at what time by being determined in program
Go out and (when sensor registration is less than actual Xu's demand, opens this output module, i.e. pneumatic operated valve, otherwise close.) alarm module
Buzzer is connected, when the temperature of sensor differs too many (2 DEG C, when the time is more than two minutes) with practical given value, buzzer is defeated
Go out.
According to the purifying technique of benzoic acid, need temperature dropping to 109 DEG C from 120 DEG C, decline rule during which is every
The time for declining one DEG C is to need 8Min, 8Min, 10Min, 13Min, 13Min, 13Min, 13Min, 13Min, 10Min,
10Min, the 10Min all stage need 11 stages, need 121 minutes in total.The difficult point of technology is that the temperature controlled is real
Shi Bianhua's, there are many factor of influence, are not prodigious in other factors fluctuation, other factors include, cooling water
Temperature, environment temperature, unstable etc. the factor of the temperature of industrial steam.And it is also to need to change to need the temperature controlled,
So the core of this technology is that PLC is used with the comprehensive of third party's instrument, produce a desired effect, and temperature control is steady
It is fixed.
In the sweating stage, temperature needs to control within a certain fixed temperature range, according to the quality of material, temperature
It differs, the temperature of ordinary material needs to control in the range of 122 DEG C.This temperature needs persistently several hours, stability
It is necessary factor.So digital display meter and PLC's works along both lines, being precisely controlled for temperature is reached.
The invention is controlled entire melting process using PLC control cabinet, and entire melting process is made to realize certainly
The intelligent control of dynamicization, and the temperature control accuracy in crystallization process is high, has reached what permanent slop control temperature declined
It is required that improving the concentration of benzoic acid purification, reduce the input of manpower.
The foregoing is merely the preferred embodiments of the invention, are not intended to limit the invention creation, all at this
Within the spirit and principle of innovation and creation, any modification, equivalent replacement, improvement and so on should be included in the invention
Protection domain within.
Claims (6)
1. a kind of chemical industry melts tower intelligent temperature control system, it is characterised in that：Including melting tower and PLC control cabinet, on melting tower
The feed pipe of connection is equipped with acid circulating pump；It is equipped with heat conduction oil circulating pump in the heat conduction oil circuit piping of the melting tower connection,
And it is in parallel equipped with heating and vaporizing device and cooling device, the heat supplying pipeline of the heating and vaporizing device in heat conduction oil circuit piping
In be equipped with sweating pneumatic operated valve, and be equipped with sweating ratio adjusting valve；Knot is equipped in the cold water outlet pipeline of the equipment of crystallisation by cooling
Brilliant pneumatic operated valve, and it is equipped with crystal area proportion regulating valve；Industrial steam escape pipe, cooling device are communicated on the heating and vaporizing device
Cold water supplying pipe road in be connected with cooling water circulating pump；The acid circulating pump, heat conduction oil circulating pump, sweating pneumatic operated valve, sweating
Ratio adjusting valve, crystallization pneumatic operated valve and crystal area proportion regulating valve are connect with PLC control cabinet.
2. a kind of chemical industry according to claim 1 melts tower intelligent temperature control system, it is characterised in that：The cold water outlet pipe
Road and cold water supplying pipe road are respectively equipped with temperature display meter；The temperature display meter is connect with PLC control cabinet.
3. a kind of chemical industry according to claim 1 melts tower intelligent temperature control system, it is characterised in that：The conduction oil cycle
Heating and vaporizing device place pipeline is corresponded in pipeline and control valve is equipped with to pipeline where cooling device.
4. a kind of chemical industry according to claim 1 melts tower intelligent temperature control system, it is characterised in that：The heat conductive circulation pump
Conduction oil coming oil direction one end in heating and vaporizing device and cooling device is set.
5. a kind of chemical industry according to claim 1 melts tower intelligent temperature control system, it is characterised in that：The PLC control cabinet
It is equipped with alarm.
6. a kind of chemical industry according to claim 1 melts tower intelligent temperature control system, it is characterised in that：The PLC control cabinet
It is equipped with information display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810891525.7A CN108681348A (en) | 2018-08-07 | 2018-08-07 | A kind of chemical industry melting tower intelligent temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810891525.7A CN108681348A (en) | 2018-08-07 | 2018-08-07 | A kind of chemical industry melting tower intelligent temperature control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108681348A true CN108681348A (en) | 2018-10-19 |
Family
ID=63816182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810891525.7A Pending CN108681348A (en) | 2018-08-07 | 2018-08-07 | A kind of chemical industry melting tower intelligent temperature control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108681348A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793819A (en) * | 2021-09-16 | 2021-12-14 | 长江存储科技有限责任公司 | Chemical tank and temperature control method thereof |
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|---|---|---|---|---|
| CN201244377Y (en) * | 2008-08-04 | 2009-05-27 | 宁波志华化学有限公司 | Fractional crystallization device |
| CN201625434U (en) * | 2009-12-30 | 2010-11-10 | 上海奎林化工有限公司 | Purification device |
| CN102001935A (en) * | 2010-11-29 | 2011-04-06 | 武汉有机实业有限公司 | Refining method of benzoic acid |
| CN103480175A (en) * | 2013-09-24 | 2014-01-01 | 荣先奎 | Melting crystallizer |
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2018
- 2018-08-07 CN CN201810891525.7A patent/CN108681348A/en active Pending
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| CN201244377Y (en) * | 2008-08-04 | 2009-05-27 | 宁波志华化学有限公司 | Fractional crystallization device |
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| CN105294384A (en) * | 2015-10-29 | 2016-02-03 | 中石化南京工程有限公司 | Device for separating p-xylene crystal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113793819A (en) * | 2021-09-16 | 2021-12-14 | 长江存储科技有限责任公司 | Chemical tank and temperature control method thereof |
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Application publication date: 20181019 |