CN205563299U - A temperature control cascade control system for alkoxylation unit - Google Patents
A temperature control cascade control system for alkoxylation unit Download PDFInfo
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- CN205563299U CN205563299U CN201620257897.0U CN201620257897U CN205563299U CN 205563299 U CN205563299 U CN 205563299U CN 201620257897 U CN201620257897 U CN 201620257897U CN 205563299 U CN205563299 U CN 205563299U
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Abstract
The utility model relates to a temperature control cascade control system for alkoxylation unit, it includes the material heat exchanger, its characteristics are: still include the material temperature detector, the export of the material of material heat exchanger through the material temperature detector is connected with controller signal, the heat transferring medium entry is connected with heating medium governing valve and coolant governing valve, the homophony that constitution temperature parameters controlled is unlinked, heating medium governing valve and coolant governing valve are equallyd divide and bie are connected with controller signal through heat transfer medium temperature regulator and material temperature regulator simultaneously, and heat transfer medium temperature detector is connected with the controller, constitute the vice ring of mediating of temperature parameters control. The working process is, output valve that the homophony of temperature parameters control was unlinked is as the vice setting value of mediating the ring of temperature parameters control, and what ring output was mediated to temperature parameters control vice establishes control with fixed set -point heating medium governing valve and coolant governing valve, realizes that the material reacts temperature control cascade regulation.
Description
Technical field
The utility model belongs to petrochemical industry, more particularly, it relates to the temperature of a kind of alkoxylation unit main reaction controls, is that a kind of temperature for alkoxylation unit controls cascade control system.
Background technology
Temperature many employings single loop regulation of alkoxylation unit main reaction at present controls, temperature of charge is setting value, when temperature of charge exceedes setting value, temperature control system just can carry out temperature conciliation, temperature is reconciled, is again reached setting value and need the regular hour, and alkoxylate (second/propoxylation) reaction member main reaction temperature is unstable during this period of time.Owing to the temperature conciliation of temperature control system is long for lag time, not in time, alkoxylate (second/propoxylation) reaction member main reaction temperature controls instability in regulation, and temperature fluctuation is big, causes reaction time long, poor product quality.Yield in unit time is low, and product cost is high, and batch weight renaturation is the lowest.And owing to alkoxylate (second/propoxylation) reaction is strong exothermal reaction, raw material chemical property is active, inflammable, explosive, poisonous, so ensureing that course of reaction safety and stability is particularly important, and reaction member main reaction temperature controls instability, the most then there is certain potential safety hazard in temperature fluctuation.
Summary of the invention
The present utility model purpose is: overcome the deficiencies in the prior art, provide a kind of have temperature change anticipation function, for alkoxylation unit temperature control cascade control system, control for ethoxylation, propoxylation reaction member main reaction temperature, can be according to the temperature of charge anticipation temperature changing trend detected, carry out temperature of charge conciliation in good time, guarantee that temperature of charge is stable, shorten reaction time, ensure that product quality is steady, stop reaction member main reaction temperature and control instability, the potential safety hazard that temperature fluctuation causes greatly.
nullThe utility model solves the scheme of technical problem: a kind of temperature for alkoxylation unit controls cascade control system，It includes material heat exchanger，The material inlet of described material heat exchanger bottom surface is connected with the outlet of alkoxylation device、The material outlet of end face is connected with the charging aperture of alkoxylation device，Material heat exchanger bottom arranges heat transferring medium entrance、Top arranges heat transferring medium outlet，The heat transferring medium outlet on material heat exchanger top is connected with heat transferring medium circulating pump，It is characterized in that: also include temperature of charge detector、Temperature of charge transmitter、Controller、Add thermal medium regulation valve、Cooling medium regulation valve、Heat exchange medium temperature adjuster、Temperature of charge adjuster、Heat exchange medium temperature detector and heat exchange medium temperature transmitter，The material outlet of described material heat exchanger passes sequentially through temperature of charge detector、Temperature of charge transmitter is connected with controller signals，The heat transferring medium entrance that described material heat exchanger bottom is arranged parallel connection simultaneously adds thermal medium regulation valve and cooling medium regulation valve，The import adding thermal medium regulation valve is connected with heater，The import of cooling medium regulation valve is connected with cooler，The homophony thus constituting temperature parameter control is unlinked；Add thermal medium regulation valve and cooling medium regulation valve is connected with controller signals by heat exchange medium temperature adjuster and temperature of charge adjuster the most simultaneously, heat exchange medium temperature detector is placed in the heat transferring medium entrance of material heat exchanger bottom setting and regulates between valve or cooling medium regulation valve with adding thermal medium and be connected with controller by heat exchange medium temperature transmitter, thus constitutes the pair conciliation ring that temperature parameter controls.
Described material heat exchanger, temperature of charge detector, temperature of charge transmitter, controller, add thermal medium regulation valve, cooling medium regulation valve, heat exchange medium temperature adjuster, temperature of charge adjuster, heat exchange medium temperature detector and heat exchange medium temperature transmitter are the commercially available prod of prior art.
The course of work of the present utility model comprises the secondary conciliation ring that homophony is unlinked, temperature parameter controls and the material reaction temperature control bunch grade adjustment process that temperature parameter controls, and its course of work is as follows:
The homophony that 1 temperature parameter controls is unlinked for the detection control of temperature of charge, its ring is with temperature of charge setting value as parameter, the temperature of charge of detection is inputted controller and temperature of charge setting value comparison by temperature of charge transmitter by temperature of charge detector in real time, by comparison anticipation temperature of charge variation tendency and varying offset amount, and the heat transferring medium needed by parameter computing output controls temperature value；
The secondary ring of reconciling that 2 temperature parameters control controls for the temperature detection adding thermal medium or cooling medium, it controls temperature value as parameter with the heat transferring medium of controller output, the heat exchange medium temperature of detection is inputted controller and heat exchange medium temperature setting value comparison by heat exchange medium temperature transmitter by heat exchange medium temperature detector in real time, by temperature changing trend and the varying offset amount of comparison anticipation heat transferring medium, thermal medium regulation valve and the aperture of cooling medium regulation valve is added by parameter computing output regulation, and then reach to regulate heat exchange medium temperature, meet temperature parameter control homophony unlink anticipation computing output temperature value, reach to be precisely controlled the purpose of reaction cycle temperature；
3 material reaction temperature control bunch grade adjustment processes: the unlink heat transferring medium of output of the homophony that temperature parameter controls controls the setting value of the secondary conciliation ring that temperature value controls as temperature parameter, the secondary set value calculation reconciling ring output that temperature parameter controls adds thermal medium regulation valve and cooling medium regulation valve, it is achieved material reaction temperature controls bunch grade adjustment.
The beneficial effects of the utility model are: the utility model controls cascade control system in the temperature of alkoxylation unit, overcome because temperature lag times is long, regulation is not in time, alkoxylation unit main reaction temperature controls unstable shortcoming, can be according to the temperature of charge anticipation temperature changing trend detected, carry out temperature of charge conciliation in good time, guarantee that temperature of charge is stable, achieve the essentially linear operation of temperature curve, shorten reaction time, ensureing that product quality is steady, product quality is excellent reproducible.Yield in unit time is high, and process units realizes high load capacity stable operation, reduces production cost, stops reaction member main reaction temperature and controls instability, the potential safety hazard that temperature fluctuation causes greatly.Have that reaction time is short, product quality is steady, production cost is low, advantage safely and efficiently.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1 controller, 2 temperature of charge adjusters, 3 temperature of charge transmitters, 4 temperature of charge detectors, 5 heat exchange medium temperature adjusters, 6 heat exchange medium temperature transmitters, 7 heat exchange medium temperature detectors, 8 add thermal medium regulation valve, 9 cooling medium regulation valves, 10 material heat exchangers.
Detailed description of the invention
With embodiment, the utility model is further illustrated below in conjunction with the accompanying drawings.
nullSee Fig. 1，A kind of temperature for alkoxylation unit of the utility model controls cascade control system，It includes material heat exchanger 10，The material inlet of described material heat exchanger 10 bottom surface is connected with the outlet of alkoxylation device、The material outlet of end face is connected with alkoxylation device charging aperture，Material heat exchanger 10 bottom arranges heat transferring medium entrance、Top arranges heat transferring medium outlet，The heat transferring medium outlet on material heat exchanger 10 top is connected with heat transferring medium circulating pump，Also include temperature of charge detector 4、Temperature of charge transmitter 3、Controller 1、Add thermal medium regulation valve 8、Cooling medium regulation valve 9、Heat exchange medium temperature adjuster 5、Temperature of charge adjuster 2、Heat exchange medium temperature detector 7 and heat exchange medium temperature transmitter 6，The material outlet of described material heat exchanger 10 passes sequentially through temperature of charge detector 4、Temperature of charge transmitter 3 is connected with controller 1 signal，The heat transferring medium entrance that described material heat exchanger 10 bottom is arranged parallel connection simultaneously adds thermal medium regulation valve 8 and cooling medium regulation valve 9，The import adding thermal medium regulation valve 8 is connected with heater，The import of cooling medium regulation valve 9 is connected with cooler，The homophony thus constituting temperature parameter control is unlinked；Add thermal medium regulation valve 8 and cooling medium regulation valve 9 is connected with controller 1 signal by heat exchange medium temperature adjuster 5 and temperature of charge adjuster 2 the most simultaneously, heat exchange medium temperature detector 7 is placed in the heat transferring medium entrance of material heat exchanger 10 bottom setting and is connected with controller 1 with adding between thermal medium regulation valve 8 or cooling medium regulation valve 9 and passing through heat exchange medium temperature transmitter 6, thus constitutes the secondary of temperature parameter control and reconciles ring.
The present embodiment uses prior art manufacture, described material heat exchanger 10, temperature of charge detector 4, temperature of charge transmitter 3, controller 1, add thermal medium regulation valve 8, cooling medium regulation valve 9, heat exchange medium temperature adjuster 5, temperature of charge adjuster 2, heat exchange medium temperature detector 7 and heat exchange medium temperature transmitter 6 are the commercially available prod of prior art.
The course of work of the present embodiment is: it comprises the secondary conciliation ring that homophony is unlinked, temperature parameter controls and the material reaction temperature control bunch grade adjustment process that temperature parameter controls, and its course of work is as follows:
The homophony that 1 temperature parameter controls is unlinked for the detection control of temperature of charge, its ring is with temperature of charge setting value as parameter, the temperature of charge of detection is inputted controller 1 and temperature of charge setting value comparison by temperature of charge transmitter 3 by temperature of charge detector 4 in real time, by comparison anticipation temperature of charge variation tendency and varying offset amount, and the heat transferring medium needed by parameter computing output controls temperature value；
The secondary ring of reconciling that 2 temperature parameters control controls for the temperature detection adding thermal medium or cooling medium, it controls temperature value as parameter with the heat transferring medium of controller 1 output, the heat exchange medium temperature of detection is inputted controller 1 and heat exchange medium temperature setting value comparison by heat exchange medium temperature transmitter 6 by heat exchange medium temperature detector 7 in real time, by temperature changing trend and the varying offset amount of comparison anticipation heat transferring medium, thermal medium regulation valve 8 or the aperture of cooling medium regulation valve 9 is added again by parameter computing output regulation, and then reach to regulate heat exchange medium temperature, meet temperature parameter control homophony unlink anticipation computing output temperature value, reach to be precisely controlled the purpose of reaction cycle temperature；
3 material reaction temperature control bunch grade adjustment processes: the unlink heat transferring medium of output of the homophony that temperature parameter controls controls the setting value of the secondary conciliation ring that temperature value controls as temperature parameter, the secondary set value calculation reconciling ring output that temperature parameter controls adds thermal medium regulation valve 8 and cooling medium regulation valve 9, it is achieved material reaction temperature controls bunch grade adjustment.
Claims (1)
- null1. the temperature for alkoxylation unit controls cascade control system，It includes material heat exchanger，The material inlet of described material heat exchanger bottom surface is connected with the discharging opening of alkoxylation device bottom surface，The material outlet of material heat exchanger end face is connected with the charging aperture of alkoxylation device end face，Material heat exchanger bottom arranges heat transferring medium entrance、Top arranges heat transferring medium outlet，The heat transferring medium outlet on material heat exchanger top is connected with heat transferring medium circulating pump，It is characterized in that: also include temperature of charge detector、Temperature of charge transmitter、Controller、Add thermal medium regulation valve、Cooling medium regulation valve、Heat exchange medium temperature adjuster、Temperature of charge adjuster、Heat exchange medium temperature detector and heat exchange medium temperature transmitter，The material outlet of described material heat exchanger passes sequentially through temperature of charge detector、Temperature of charge transmitter is connected with controller signals，The heat transferring medium entrance that described material heat exchanger bottom is arranged parallel connection simultaneously adds thermal medium regulation valve and cooling medium regulation valve，The import adding thermal medium regulation valve is connected with heater，The import of cooling medium regulation valve is connected with cooler，The homophony thus constituting temperature parameter control is unlinked；Add thermal medium regulation valve and cooling medium regulation valve is connected with controller signals by heat exchange medium temperature adjuster and temperature of charge adjuster the most simultaneously, heat exchange medium temperature detector is placed in the heat transferring medium entrance of material heat exchanger bottom setting and regulates between valve or cooling medium regulation valve with adding thermal medium and be connected with controller by heat exchange medium temperature transmitter, thus constitutes the pair conciliation ring that temperature parameter controls.
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| CN201620257897.0U CN205563299U (en) | 2016-03-30 | 2016-03-30 | A temperature control cascade control system for alkoxylation unit |
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| CN201620257897.0U CN205563299U (en) | 2016-03-30 | 2016-03-30 | A temperature control cascade control system for alkoxylation unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289806A (en) * | 2017-06-22 | 2017-10-24 | 兰州蓝星纤维有限公司 | The temperature controlled devices and methods therefor of stoste before a kind of carbon fibre precursor is spun |
| CN107501039A (en) * | 2017-07-28 | 2017-12-22 | 石河子开发区天业化工有限责任公司 | A kind of control method of vinyl chloride high boiling tower blowdown and recovery |
| CN107999012A (en) * | 2017-12-28 | 2018-05-08 | 山东豪迈化工技术有限公司 | A kind of reactor and chemical producing system |
| CN111765636A (en) * | 2020-06-19 | 2020-10-13 | 成都科瑞尔低温设备有限公司 | An intelligent cryogenic fluid electric heating system |
| CN111974323A (en) * | 2020-07-30 | 2020-11-24 | 福建立亚化学有限公司 | Reaction kettle temperature control system and method |
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2016
- 2016-03-30 CN CN201620257897.0U patent/CN205563299U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289806A (en) * | 2017-06-22 | 2017-10-24 | 兰州蓝星纤维有限公司 | The temperature controlled devices and methods therefor of stoste before a kind of carbon fibre precursor is spun |
| CN107501039A (en) * | 2017-07-28 | 2017-12-22 | 石河子开发区天业化工有限责任公司 | A kind of control method of vinyl chloride high boiling tower blowdown and recovery |
| CN107999012A (en) * | 2017-12-28 | 2018-05-08 | 山东豪迈化工技术有限公司 | A kind of reactor and chemical producing system |
| CN107999012B (en) * | 2017-12-28 | 2024-04-26 | 山东豪迈化工技术有限公司 | Temperature control method of reactor |
| CN111765636A (en) * | 2020-06-19 | 2020-10-13 | 成都科瑞尔低温设备有限公司 | An intelligent cryogenic fluid electric heating system |
| CN111974323A (en) * | 2020-07-30 | 2020-11-24 | 福建立亚化学有限公司 | Reaction kettle temperature control system and method |
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Effective date of registration: 20200410 Address after: 132000 group 5, Desheng Committee, Shengli Street, Huadian City, Jilin City, Jilin Province Patentee after: Li Xudong Address before: 132012 No. 88, north line, Ji long camp, Jilin, Jilin Patentee before: JILIN OK AUTOMATION EQUIPMENT Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20200629 Address after: No. 1005, 10th floor, unit D, building 11, Huaye international city, Changyi District, Jilin Province Patentee after: Jilin Dingsheng Technology Co.,Ltd. Address before: 132000 group 5, Desheng Committee, Shengli Street, Huadian City, Jilin City, Jilin Province Patentee before: Li Xudong |
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Effective date of registration: 20230320 Address after: Floor 1, No. 130, West 2nd Lane, Xihai Road, Tianpeng Town, Pengzhou City, Chengdu City, Sichuan Province, 611930 Patentee after: Sichuan Dingsheng Shenglong Technology Co.,Ltd. Address before: 132000 No. 1005, 10th floor, unit D, building 11, Huaye international city, Changyi District, Jilin City, Jilin Province Patentee before: Jilin Dingsheng Technology Co.,Ltd. |
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