CN105974899A - Automatic control system for adding sulfuric acid catalyst in esterification reaction and using method thereof - Google Patents
Automatic control system for adding sulfuric acid catalyst in esterification reaction and using method thereof Download PDFInfo
- Publication number
- CN105974899A CN105974899A CN201610403562.XA CN201610403562A CN105974899A CN 105974899 A CN105974899 A CN 105974899A CN 201610403562 A CN201610403562 A CN 201610403562A CN 105974899 A CN105974899 A CN 105974899A
- Authority
- CN
- China
- Prior art keywords
- sulfuric acid
- control system
- acid catalyst
- automatic control
- dcs controller
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- 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
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
-
- 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
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
- G05B19/41835—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by programme execution
-
- 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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2609—Process control
-
- 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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses an automatic control system for adding a sulfuric acid catalyst in an esterification reaction and a using method thereof. The automatic control system of the invention comprises a weighing sensor, a frequency converter, a distributed DCS controller, a display terminal and a control valve; the weighing sensor is arranged on a pedestal of a sulfuric acid tank; the frequency converter is arranged inside a sulfuric acid pump for controlling rotation speed of the sulfuric acid pump; a control valve is arranged on an output terminal of a sulfuric acid output pipeline; the output terminal of the sulfuric acid output pipeline is connected to a reactor; a weighing sensor is connected to the distributed DCS controller; and the DCS controller is connected to the display terminal, the frequency converter and the control valve. A using method comprises: parameter setting, analog computation, parameter regulation, automatic liquid feeding, automatic shutdown, etc. The automatic control system for adding sulfuric acid catalyst in the esterification reaction and the using method thereof are high in accuracy, good in weighing reliability, high in automation, good in safety and low in cost.
Description
Technical field
The present invention relates to technical field of chemical, a kind of esterification adds automatic control system and the using method thereof of sulfuric acid catalyst.
Background technology
Esterification reaction process in Chemical Manufacture can use corresponding catalyst to help to improve reaction efficiency, the esterification produced in the industrial production for alcohol and acid, and major part is to use sulphuric acid as the catalyst of this reaction.And the chemical property of sulphuric acid is relatively active, and corrosivity is relatively strong, if added in the esterification reaction, sulfuric acid catalyst is too fast or other side reactions such as polymerization or carbonization will often occur in excess.Therefore, it is accomplished by being slowly added in the esterification reaction the amount of sulphuric acid to eliminate these deficiencies so that it is control within a rational amount ranges.Due in the severe corrosive of sulphuric acid and liquid containing a small amount of foreign material, block or situation that material is corroded if the general effusion meter of the meter selection measured there will be unavoidably, and certainty of measurement be the highest.Meanwhile, mass flowmenter is a good selection, but mass flowmenter is expensive, if containing foreign material in liquid, mass flowmenter also can exist the inaccurate defect of measurement.So we have selected the weight claiming systematic survey sulfuric acid tank for problem above a set ofly, then the signal of weight being transmitted to DCS system, DCS system controls the rotating speed of sulfuric acid pump again, thus reaches to control the addition of sulphuric acid..
Summary of the invention
It is an object of the invention to provide a kind of esterification and add the automatic control system of sulfuric acid catalyst, have weigh that accuracy is high, weigh good reliability, automaticity is high, safety is good and with low cost feature.
The present invention can be achieved through the following technical solutions:
The invention discloses a kind of esterification and add the automatic control system of sulfuric acid catalyst, including LOAD CELLS, converter, distributed DCS controller, display terminal and control valve, described LOAD CELLS is arranged on the base of sulfuric acid tank tank, described converter is arranged on inside sulfuric acid pump for controlling the rotating speed of sulfuric acid pump, described control valve is arranged on the output end of sulphuric acid transmission pipeline, the output end of described sulphuric acid transmission pipeline is connected with reactor, described LOAD CELLS is connected with described distributed DCS controller, described DCS controller is simultaneously and display terminal, converter, control valve connects.Specifically using, LOAD CELLS is used for measuring the weight of sulphuric acid, amount by weight method metered dose is more accurate than the measuring method of any effusion meter (including mass flowmenter), because weight method is not affected by material density and volume, the most the not highest by material corrupting influence, natural stability and reliability；Converter is used for controlling the rotating speed of sulfuric acid pump, the final flow controlling to add sulphuric acid；Distributed DCS controller utilizes the change calculations of the weight that the time difference of cycle of operation produces to go out the flow of sulphuric acid, then controls the flow of a setting value so that it is stable in the esterification reaction and add sulphuric acid Cui's agent accurately, reaches best reaction effect；Control valve be disposed to when course of reaction reached set time or add sulphuric acid reached set value time realize closing control valve, the most again termination of pumping, primarily to reach the purpose accurately controlled；Described display terminal is used for showing that sulfuric acid catalyst adds information.
Further, described control valve is hydraulic buttery valve, and having leaks outside blocks up absolutely, and internal hemorrhage due to trauma is easily-controllable, uses safe feature, is prevented effectively from the risk that sulphuric acid is revealed.
Further, described LOAD CELLS quantity is three, and described LOAD CELLS becomes equilateral triangle to be uniformly arranged on the base of sulfuric acid tank tank.By being uniformly arranged of three LOAD CELLSs, make LOAD CELLS weigh for sulfuric acid tank tank and form highly sensitive on-ground weigher effect, it is ensured that the accuracy of sulfuric acid catalyst liquid feeding.
Further, described display terminal is the touch screen with input interactive function.By having the touch screen inputting interactive function, technologist needs input to control amount and the time of interpolation of sulphuric acid, or can the method such as the interpolation of choice phase property, curve interpolation, linearly interpolation, formula interpolation.Can also the most self-defined interpolation scheme, property easy to use is high.
Further, described sulphuric acid transmission pipeline and described sulfuric acid tank tank pipeline communication, described sulfuric acid pump is arranged on described sulphuric acid transmission pipeline.
A kind of esterification adds the using method of the automatic control system of sulfuric acid catalyst, comprises the following steps:
The first step, parameter set, and first operator set on the display terminal interface that distributed DCS controller connects and add the weight of sulphuric acid, interpolation time；
Second step, simulation trial, start the start button on display terminal, sulfuric acid pump starts automatically, control valve to automatically open up, now sulfuric acid catalyst can be got in reactor by sulphuric acid transmission pipeline, the weight of sulfuric acid tank tank shows and gradually decreases, and distributed DCS controller goes out instantaneous flow value to user's reference according to this change calculations；
3rd step, parameter regulate, and distributed DCS controller calculates the instantaneous delivery value of reference automatically according to the gravimetric value set and interpolation time and control method；
4th step, automatic liquid-feeding, the rotating speed that distributed DCS controller compares control sulfuric acid pump according to the flow value calculated and reference stream value realizes accurately adding of sulfuric acid catalyst；
5th step, autostop, when the amount that sulfuric acid catalyst adds reaches the weight that user sets, control valve and be automatically switched off, and sulfuric acid pump is automatically stopped, automatic control system power cut-off.
Further, described in the first step parameter set can concurrently set several interpolation times and add weight numerical value carry out linear analogue computing.
A kind of esterification of the present invention adds the automatic control system of sulfuric acid catalyst and occupation mode thereof, has a following beneficial effect:
The first, accuracy is weighed high, the weight of sulphuric acid is measured by the way of using LOAD CELLS, then the tach signal of sulfuric acid pump it is converted into by distributed DCS controller, the amount of this weight method metered dose is than the measuring method of any effusion meter (including mass flowmenter), weighing process is not affected by material density and volume, has higher stability；
The second, good reliability is weighed, the weight of sulphuric acid is measured by the way of using LOAD CELLS, then the tach signal of sulfuric acid pump it is converted into by distributed DCS controller, the amount of this weight method metered dose is than the measuring method of any effusion meter (including mass flowmenter), weighing process by material corrupting influence, does not has good stability and reliability；
3rd, automaticity is high, the adding procedure of whole sulfuric acid catalyst is realized by distributed DCS controller, it is only necessary to manual control distributed DCS controller can realize the interpolation of sulfuric acid catalyst, it is not necessary to artificial and sulfuric acid contact, simplify the process of operation, improve the automaticity of interpolation；
4th, safety is good, the adding procedure of whole sulfuric acid catalyst is realized by distributed DCS controller, have only to manual control distributed DCS controller and can realize the interpolation of sulfuric acid catalyst, it is to avoid sulphuric acid reveals the probability with contact human skin, improves the safety of operating process；
5th, with low cost, the parts that whole system uses are regular industrial component, instead of the mass flowmenter that price is high, effectively reduce,.
Accompanying drawing explanation
Accompanying drawing 1 is the theory diagram that a kind of esterification of the present invention adds the automatic control system of sulfuric acid catalyst；
Accompanying drawing 2 is the structure annexation figure that a kind of esterification of the present invention adds the automatic control system of sulfuric acid catalyst；
Labelling in accompanying drawing includes: 1, sulfuric acid tank tank, 2, LOAD CELLS, 3, sulfuric acid pump, 4, distributed DCS controller, 5, control valve, 6, reactor.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that technical scheme, below in conjunction with embodiment and accompanying drawing, product of the present invention is described in further detail.
Embodiment 1
Such as Fig. 1, shown in Fig. 2, the invention discloses a kind of esterification and add the automatic control system of sulfuric acid catalyst, including LOAD CELLS 2, converter, distributed DCS controller 4, display terminal and control valve 5, described LOAD CELLS 2 is arranged on the base of sulfuric acid tank tank 1, it is internal for controlling the rotating speed of sulfuric acid pump 3 that described converter is arranged on sulfuric acid pump 3, described control valve 5 is arranged on the output end of sulphuric acid transmission pipeline, the output end of described sulphuric acid transmission pipeline is connected with reactor 6, described LOAD CELLS 2 is connected with described distributed DCS controller 4, described DCS controller is simultaneously and display terminal, converter, control valve 5 connects.Described control valve 5 is hydraulic buttery valve.Described LOAD CELLS 2 quantity is three, and described LOAD CELLS 2 becomes on the base that equilateral triangle is uniformly arranged on sulfuric acid tank tank 1.Described display terminal is the touch screen with input interactive function.Described sulphuric acid transmission pipeline and described sulfuric acid tank tank 1 pipeline communication, described sulfuric acid pump 3 is arranged on described sulphuric acid transmission pipeline.
In actual use, in order to ensure the stability of system, can also arrange Filtering Processing at distributed DCS controller to process the microseism of sulfuric acid tank tank, overcome material, from sulfuric acid tank output, the material in groove can be produced microseismic activity, it is inaccurate for further ensuring the data read of weighing.Meanwhile, in order to improve the accuracy of data further, distributed DCS controller can also be filtered delay process according to the time, it is ensured that user reads data accurately.
Embodiment 2
A kind of esterification adds the using method of the automatic control system of sulfuric acid catalyst, comprises the following steps:
The first step, parameter set, and first operator set on the display terminal interface that distributed DCS controller connects and add the weight of sulphuric acid, interpolation time；
Second step, simulation trial, start the start button on display terminal, sulfuric acid pump starts automatically, control valve to automatically open up, now sulfuric acid catalyst can be got in reactor by sulphuric acid transmission pipeline, the weight of sulfuric acid tank tank shows and gradually decreases, and distributed DCS controller goes out instantaneous flow value to user's reference according to this change calculations；
3rd step, parameter regulate, and distributed DCS controller calculates the instantaneous delivery value of reference automatically according to the gravimetric value set and interpolation time and control method；
4th step, automatic liquid-feeding, the rotating speed that distributed DCS controller compares control sulfuric acid pump according to the flow value calculated and reference stream value realizes accurately adding of sulfuric acid catalyst；
5th step, autostop, when the amount that sulfuric acid catalyst adds reaches the weight that user sets, control valve and be automatically switched off, and sulfuric acid pump is automatically stopped, automatic control system power cut-off.
In the present embodiment, in order to be further ensured that the accuracy of simulation trial, parameter setting described in the first step can concurrently set the numerical value of several interpolation times and interpolation weight and carry out linear analogue computing, as 20 minutes add 20Kg, 30 minutes interpolation 10Kg, 10 minutes interpolation 15Kg；Calculate with specific reference to adding flow according to reality, to be advisable close to the theoretical flow that adds.
The above, only presently preferred embodiments of the present invention, not the present invention is made any pro forma restriction；The those of ordinary skill of all industry all can described in by specification accompanying drawing and the above and implement the present invention swimmingly；But, all those skilled in the art in the range of without departing from technical solution of the present invention, available disclosed above technology contents and a little change made, the equivalent variations modifying and develop, be the Equivalent embodiments of the present invention；Meanwhile, any equivalent variations that above example is made by all substantial technological according to the present invention change, modify and differentiation etc., within all still falling within the protection domain of technical scheme.
Claims (7)
1. the automatic control system of an esterification interpolation sulfuric acid catalyst, it is characterized in that: include LOAD CELLS, converter, distributed DCS controller, display terminal and control valve, described LOAD CELLS is arranged on the base of sulfuric acid tank tank, described converter is arranged on inside sulfuric acid pump for controlling the rotating speed of sulfuric acid pump, described control valve is arranged on the output end of sulphuric acid transmission pipeline, the output end of described sulphuric acid transmission pipeline is connected with reactor, described LOAD CELLS is connected with described distributed DCS controller, described DCS controller is simultaneously and display terminal, converter, control valve connects.
Esterification the most according to claim 1 adds the automatic control system of sulfuric acid catalyst, it is characterised in that: described control valve is hydraulic buttery valve.
The most according to claim 2, esterification adds the automatic control system of sulfuric acid catalyst, it is characterised in that: described LOAD CELLS quantity is three, and described LOAD CELLS becomes equilateral triangle to be uniformly arranged on the base of sulfuric acid tank tank.
Esterification the most according to claim 3 adds the automatic control system of sulfuric acid catalyst, it is characterised in that: described display terminal is the touch screen with input interactive function.
Esterification the most according to claim 4 adds the automatic control system of sulfuric acid catalyst, it is characterised in that: described sulphuric acid transmission pipeline and described sulfuric acid tank tank pipeline communication, described sulfuric acid pump is arranged on described sulphuric acid transmission pipeline.
6. esterification described in claim any one of a Claims 1 to 5 adds the using method of automatic control system of sulfuric acid catalyst, it is characterised in that comprise the following steps:
The first step, parameter set, and first operator set on the display terminal interface that distributed DCS controller connects and add the weight of sulphuric acid, interpolation time；
Second step, simulation trial, start the start button on display terminal, sulfuric acid pump starts automatically, control valve to automatically open up, now sulfuric acid catalyst can be got in reactor by sulphuric acid transmission pipeline, the weight of sulfuric acid tank tank shows and gradually decreases, and distributed DCS controller goes out instantaneous flow value to user's reference according to this change calculations；
3rd step, parameter regulate, and distributed DCS controller calculates the instantaneous delivery value of reference automatically according to the gravimetric value set and interpolation time and control method；
4th step, automatic liquid-feeding, the rotating speed that distributed DCS controller compares control sulfuric acid pump according to the flow value calculated and reference stream value realizes accurately adding of sulfuric acid catalyst；
5th step, autostop, when the amount that sulfuric acid catalyst adds reaches the weight that user sets, control valve and be automatically switched off, and sulfuric acid pump is automatically stopped, automatic control system power cut-off.
Esterification the most according to claim 6 adds the using method of the automatic control system of sulfuric acid catalyst, it is characterised in that: parameter setting described in the first step can concurrently set the numerical value of several interpolation times and interpolation weight and carry out linear analogue computing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610403562.XA CN105974899A (en) | 2016-06-12 | 2016-06-12 | Automatic control system for adding sulfuric acid catalyst in esterification reaction and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610403562.XA CN105974899A (en) | 2016-06-12 | 2016-06-12 | Automatic control system for adding sulfuric acid catalyst in esterification reaction and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105974899A true CN105974899A (en) | 2016-09-28 |
Family
ID=57010397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610403562.XA Pending CN105974899A (en) | 2016-06-12 | 2016-06-12 | Automatic control system for adding sulfuric acid catalyst in esterification reaction and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105974899A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109013092A (en) * | 2018-10-26 | 2018-12-18 | 伟创力电子技术(苏州)有限公司 | Scaling powder liquid level and flow-monitoring device |
| CN112033480A (en) * | 2020-08-13 | 2020-12-04 | 宁波北新建材有限公司 | Potassium sulfate flow monitoring method and potassium sulfate flow monitoring device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013322A (en) * | 2007-02-08 | 2007-08-08 | 浙江大学 | Automatic control device and method for liquid level of tundish |
| CN201413471Y (en) * | 2009-05-27 | 2010-02-24 | 广东省力拓民爆器材厂 | Automatic control system of production line of expanded ammonium nitrate explosive |
| CN102558418A (en) * | 2012-01-10 | 2012-07-11 | 杭州电化集团有限公司 | Method for producing high-polymerization-degree polyvinyl chloride resin through suspension method |
| CN202530009U (en) * | 2012-04-01 | 2012-11-14 | 山东国邦药业股份有限公司 | D-ethyal ester production system |
| CN203183997U (en) * | 2013-03-08 | 2013-09-11 | 上海天坛助剂有限公司 | Automatic production system for glycerin polyethenoxy ether sulfonate |
| CN103718696A (en) * | 2014-01-01 | 2014-04-16 | 石河子市华农种子机械制造有限公司 | Acid seed reactor in cotton seed machining |
| CN104028190A (en) * | 2013-03-08 | 2014-09-10 | 上海天坛助剂有限公司 | Sulfonated ethoxylated glycerine automatic-production system and automatic control method thereof |
| CN204057973U (en) * | 2014-08-14 | 2014-12-31 | 开封万盛新材料有限公司 | Automatic device of adding acid during sic acid elution is pure |
| CN204058571U (en) * | 2014-09-29 | 2014-12-31 | 乐山盛和稀土股份有限公司 | For the automatic acid supply system of Rare Earth Production |
| CN104353375A (en) * | 2014-11-06 | 2015-02-18 | 内蒙古包钢稀土(集团)高科技股份有限公司 | Automatic preparing device and method for organic saponification alkaline liquor in rare earth wet-process smelting process |
| EP2906527A1 (en) * | 2012-10-09 | 2015-08-19 | Elevance Renewable Sciences, Inc. | Methods of refining and producing dibasic esters and acids from natural oil feedstocks |
| CN204752508U (en) * | 2015-06-30 | 2015-11-11 | 成都光明光电股份有限公司 | Continuous type automatic material conveying machine |
-
2016
- 2016-06-12 CN CN201610403562.XA patent/CN105974899A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013322A (en) * | 2007-02-08 | 2007-08-08 | 浙江大学 | Automatic control device and method for liquid level of tundish |
| CN201413471Y (en) * | 2009-05-27 | 2010-02-24 | 广东省力拓民爆器材厂 | Automatic control system of production line of expanded ammonium nitrate explosive |
| CN102558418A (en) * | 2012-01-10 | 2012-07-11 | 杭州电化集团有限公司 | Method for producing high-polymerization-degree polyvinyl chloride resin through suspension method |
| CN202530009U (en) * | 2012-04-01 | 2012-11-14 | 山东国邦药业股份有限公司 | D-ethyal ester production system |
| EP2906527A1 (en) * | 2012-10-09 | 2015-08-19 | Elevance Renewable Sciences, Inc. | Methods of refining and producing dibasic esters and acids from natural oil feedstocks |
| CN203183997U (en) * | 2013-03-08 | 2013-09-11 | 上海天坛助剂有限公司 | Automatic production system for glycerin polyethenoxy ether sulfonate |
| CN104028190A (en) * | 2013-03-08 | 2014-09-10 | 上海天坛助剂有限公司 | Sulfonated ethoxylated glycerine automatic-production system and automatic control method thereof |
| CN103718696A (en) * | 2014-01-01 | 2014-04-16 | 石河子市华农种子机械制造有限公司 | Acid seed reactor in cotton seed machining |
| CN204057973U (en) * | 2014-08-14 | 2014-12-31 | 开封万盛新材料有限公司 | Automatic device of adding acid during sic acid elution is pure |
| CN204058571U (en) * | 2014-09-29 | 2014-12-31 | 乐山盛和稀土股份有限公司 | For the automatic acid supply system of Rare Earth Production |
| CN104353375A (en) * | 2014-11-06 | 2015-02-18 | 内蒙古包钢稀土(集团)高科技股份有限公司 | Automatic preparing device and method for organic saponification alkaline liquor in rare earth wet-process smelting process |
| CN204752508U (en) * | 2015-06-30 | 2015-11-11 | 成都光明光电股份有限公司 | Continuous type automatic material conveying machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109013092A (en) * | 2018-10-26 | 2018-12-18 | 伟创力电子技术(苏州)有限公司 | Scaling powder liquid level and flow-monitoring device |
| CN112033480A (en) * | 2020-08-13 | 2020-12-04 | 宁波北新建材有限公司 | Potassium sulfate flow monitoring method and potassium sulfate flow monitoring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203241127U (en) | Electronic scale with temperature auto-compensation, and calibration system | |
| CN201974701U (en) | Electronic scale flow control system | |
| CN101708442B (en) | Fully automatic standard gas preparation device | |
| CN102500253A (en) | Novel device for distributing standard gas | |
| CN102350736A (en) | Stirring building or station embedded control system | |
| CN103542258B (en) | High-precision liquid Propellant Loading System combined basis weight device | |
| CN204214881U (en) | A kind of automatic quantitative liquid feeder | |
| CN103487119A (en) | Full-automatic error correction checking device for electronic water meter and method thereof | |
| CN105974899A (en) | Automatic control system for adding sulfuric acid catalyst in esterification reaction and using method thereof | |
| CN108692803A (en) | A kind of method of key calibration belted electronic balance and the belt conveyer scale with this method | |
| CN103041724A (en) | Novel air distributing device in static volume method and air distributing method | |
| CN202974399U (en) | Oil measuring system | |
| CN204883403U (en) | Online ratio detecting system of solution strength | |
| CN201324604Y (en) | Standard automatic distributing device for mixed gas | |
| CN104089687A (en) | Online calibration device and method for LNG filling machine | |
| CN202951408U (en) | Novel device for preparing gas by static volume method | |
| CN106768127B (en) | Pulse type flow accurate measurement and control system and method | |
| CN203965001U (en) | A kind of automatic Calibration spiral metering scale | |
| CN113447102A (en) | Method for controlling discharge flow of weightless scale | |
| CN205644786U (en) | Liquid measurement system of machine is sold to liquid | |
| CN103389138A (en) | Weighing type liquid level meter system based on MSP430 (Mixed Signal Processor 430) single chip microcomputer | |
| CN115452062A (en) | Flow measuring method, flow measuring device, computer equipment and storage medium | |
| CN205691245U (en) | A kind of Intellectual Thermal Transmitter of wireless calibration | |
| CN201149498Y (en) | Intelligent liquid crystal display flux integrating instrument with compensation | |
| CN211477328U (en) | Automatic detection system and production line for flow of viscous sauce |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160928 |
|
| RJ01 | Rejection of invention patent application after publication |