CN103551064A - Method for automatically regulating concentration of ethanol - Google Patents

Method for automatically regulating concentration of ethanol Download PDF

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Publication number
CN103551064A
CN103551064A CN201310540568.8A CN201310540568A CN103551064A CN 103551064 A CN103551064 A CN 103551064A CN 201310540568 A CN201310540568 A CN 201310540568A CN 103551064 A CN103551064 A CN 103551064A
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CN
China
Prior art keywords
solution
concentration
volume
blend tank
ethanol
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Pending
Application number
CN201310540568.8A
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Chinese (zh)
Inventor
卢佩
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CHANGZHOU MACRO-E ENERGY-SAVING TECHNOLOGY Co Ltd
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CHANGZHOU MACRO-E ENERGY-SAVING TECHNOLOGY Co Ltd
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Priority to CN201310540568.8A priority Critical patent/CN103551064A/en
Publication of CN103551064A publication Critical patent/CN103551064A/en
Pending legal-status Critical Current

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Abstract

The invention relates to the technical field of ethanol blending and in particular relates to a method for automatically regulating concentration of ethanol. The method for automatically regulating the concentration of the ethanol comprises the following steps: (1) mounting a liquid level transmitter (LC) on a blending tank, so as to measure the volume of a solution in the blending tank (the cross section area of the blending tank is known); (2) mounting a concentration meter on a circulating pipeline, so as to measure the concentration of the solution in the blending tank. The method for automatically regulating the concentration of the ethanol can realize blending of specified ethanol concentration, the concentration of an input solution can be detected, blending of an ethanol solution is facilitated, various blending requirements can be met, the operation is easy, blending is rapid, the cost is low, and the using effect is good.

Description

Concentration of alcohol automatic governing method
Technical field
The present invention relates to ethanol proportion technique field, especially a kind of concentration of alcohol automatic governing method.
Background technology
In extracting technique of Chinese medicine, ethanol is as extracting solvent, and its concentration plays conclusive effect to the quality of the recovery rate of active ingredient and even Chinese medicine; In order to save alcohol consumption reduction, ethanol usually recycles, and first as solvent, leaches active ingredient that is:, then by concentration process, reclaims Diluted Alcohol, then obtains dense ethanol (reclaiming ethanol) by rectifying.Therefore ethanol allotment is normally carried out the accurately process of allotment by the recovery ethanol of concentration the unknown (or applying mechanically ethanol) and purified water according to the concentration of process requirements.Technological requirement distributing precision is high on the one hand, on the other hand, reclaims concentration of alcohol the unknown and changes, and this brings difficulty to accurate control of dynamically allotment.
Realize the method for solution automatic governing, many employing LOAD CELLSs control weight, or flowmeter at present detects the modes such as flow, needs the concentration of known added solution simultaneously.In food processing, liquid preparation and Chemical Manufacture, all have a wide range of applications.But above method cost is high, equipment installation requirement is high, many traditional Chinese medicine enterprises cannot be accepted.
In addition, in actual allocation process, owing to being subject to the impact of instrument measurement error, environment temperature and pipeline residual liquid, all can there is larger error in the Mathematical Modeling of which kind of concocting method and actual proportioning result.For this reason, people supplement the deficiency of Mathematical Modeling conventionally with additional predicting means, or object model is revised online.
Summary of the invention
Large in order to overcome existing concentration of alcohol mixing ratio error, and the high deficiency of production cost, the invention provides a kind of concentration of alcohol automatic governing method.
The technical solution adopted for the present invention to solve the technical problems is: a kind of concentration of alcohol automatic governing method, is characterized in that:
(1), fluid level transmitter (LC) is installed on blend tank, in order to measure liquor capacity in blend tank (blend tank cross-sectional area is known); Densimeter is installed on circulation line, in order to measure solution concentration in blend tank.
(2), establishing allotment solution aimed concn is that target volume is ; The solution concentration existing at present in blend tank is , volume is , owing to being the surplus solution of last allotment, therefore , for known; The concentration of the solution 1 of allocating is , volume is , the concentration of solution 2 is , volume is ..., solution concentration be , volume is .Their relation can be by following equation expression:
Known when solution concentration, according to " right-angled intersection method ", realize by multiple percentage concentration solution mixed preparing desired concn solution.If for concentration solution concentration from high to low, for concentration solution from high to low volume required, for wanting to join the concentration of solution, for wanting to join the volume of solution.If all be greater than , all be less than , wherein for a kind of solution concentration wherein, have
:
In formula be required solution volume.
Owing to having carried volume to be in blend tank when obtaining each solution concentration solution, so, also need volume to be raw material.
(3), the concentration of automatic acquisition input solution, method is: to delivered volume in blend tank, be first solution ( < ), after utilizing densimeter to measure after mixing to mix, solution concentration is , can obtain by following formula:
To delivered volume in blend tank, be again solution 2( < ), after utilizing densimeter to measure after mixing to mix, solution concentration is , can obtain by following formula:
By that analogy, to delivered volume in blend tank, be solution ( < ), can obtain by following formula:
If blend tank cross-sectional area is ( for fixed value), the liquid level of measuring is in real time , liquor capacity .Above formula can be expressed as by liquid level:
The invention has the beneficial effects as follows, this concentration of alcohol automatic governing method can realize specifying the proportioning of concentration of alcohol, and can detect the concentration of input solution, facilitate the allotment of ethanolic solution, meet the requirement of various proportionings, convenient use, allotment is fast, and with low cost, result of use is good.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is principle schematic of the present invention.
The specific embodiment
If Fig. 1 is structural representation of the present invention, a kind of concentration of alcohol automatic governing method, is characterized in that:
(1), fluid level transmitter (LC) is installed on blend tank, in order to measure liquor capacity in blend tank (blend tank cross-sectional area is known); Densimeter is installed on circulation line, in order to measure solution concentration in blend tank.
(2), establishing allotment solution aimed concn is , target volume is ; The solution concentration existing at present in blend tank is , volume is , owing to being the surplus solution of last allotment, therefore , for known; The concentration of the solution 1 of allocating is , volume is , the concentration of solution 2 is , volume is ..., solution concentration be , volume is .Their relation can be by following equation expression:
Known when solution concentration, according to " right-angled intersection method ", realize by multiple percentage concentration solution mixed preparing desired concn solution.If for concentration solution concentration from high to low, for concentration solution from high to low volume required, for wanting to join the concentration of solution, for wanting to join the volume of solution.If all be greater than , all be less than , wherein for a kind of solution concentration wherein, have
:
In formula be required solution volume.
Owing to having carried volume to be in blend tank when obtaining each solution concentration solution, so, also need volume to be raw material.
(3), the concentration of automatic acquisition input solution, method is: to delivered volume in blend tank, be first solution ( < ), after utilizing densimeter to measure after mixing to mix, solution concentration is , can obtain by following formula:
To delivered volume in blend tank, be again solution 2( < ), after utilizing densimeter to measure after mixing to mix, solution concentration is , can obtain by following formula:
By that analogy, to delivered volume in blend tank, be solution ( < ), can obtain by following formula:
If blend tank cross-sectional area is ( for fixed value), the liquid level of measuring is in real time , liquor capacity .Above formula can be expressed as by liquid level:
The concentration of target ethanol and volume , establishing general 3.3 , be 75%.Concentration after having allocated if last be 74.5%, ethanol volume in current blend tank be 0.6 .First by PLC, controlled to open and reclaim ethanol valve and delivery pump is carried in blend tank recovery ethanol.Then the mixed concentration of alcohol of working concentration instrumentation amount , reclaim concentration of alcohol = .According to formula draw so, allocate the volume of required recovery ethanol , the recovery ethanol volume needing for the second time ; The volume that needs purified water .By PLC, controlled to open and reclaim ethanol valve and delivery pump is carried in blend tank recovery ethanol, finally open purified water valve and delivery pump and input volume in blend tank purified water.
Concentration after having allocated if last be 74.5%, ethanol volume in current blend tank be 0.6 .The amount that needs allotment be 3.3 , be 75%.
1, " finished product ethanol+purified water " pattern:
1. parameter setting: input ethanol allotment amount with required allotment concentration if finished product concentration of alcohol does not arrange, by by 95% operation or keep last value.
2. PLC will automatically calculate and prepare.
First calculate the finished product amount of alcohol that need add , for finished product concentration of alcohol.Open corresponding pump and valve input finished product ethanol, read in real time the level value of blend tank , and automatically calculate , when time, close respective pump and valve.Liquid level is now .
Then calculate the purifying water yield that need add .Open again corresponding pump and valve input purified water, read in real time the level value of blend tank , when time, close respective pump and valve.
3. read concentration value: add with after, starting the self-loopa of blend tank allotment ethanol, time delay a period of time (stablizing) is read concentration measurement .
If 4. concentration measurement , meeting allowable error, allotment finishes.
If , to blend tank input purified water , , restart circulation, read , until , allotment finishes.
If , to blend tank input finished product ethanol .Restart circulation, read , until , allotment finishes.
2, " recovery ethanol+purified water " pattern:
1. parameter setting: input ethanol allotment amount with required allotment concentration .
2. PLC will automatically calculate and prepare.
3. obtain recovery concentration of alcohol: first by adding finished product ethanol to calculate the recovery amount of alcohol that need add , for finished product concentration of alcohol.Order .Open respective pump and valve, to blend tank input, reclaim ethanol, measuring method is the same, works as input after, close corresponding pump and valve.Start blend tank self-loopa, after time delay a period of time, read concentration value .Reclaim concentration of alcohol .
4. calculate and reclaim amount of alcohol added , the amount that need to add is again , the purifying water yield that need add .And automatically add respectively with .
5. read concentration value: start the self-loopa of blend tank allotment ethanol, time delay a period of time (stablizing) is read concentration value .
If meet error requirements, allotment finishes, otherwise by " finished product ethanol+purified water " pattern 4. method automatically revise.
" Diluted Alcohol+purified water " pattern is identical with " reclaiming ethanol+purified water " mode method, need to first obtain the concentration of Diluted Alcohol." finished product ethanol+Diluted Alcohol " pattern, is the concentration that will first obtain Diluted Alcohol, and the method for calculating is first by adding water, to calculate after the amount that need to add, and adds amount of calculation, then read concentration measurement, calculate the concentration of Diluted Alcohol, other is identical with above method.

Claims (1)

1. a concentration of alcohol automatic governing method, is characterized in that:
(1), fluid level transmitter (LC) is installed on blend tank, in order to measure liquor capacity in blend tank (blend tank cross-sectional area is known); Densimeter is installed on circulation line, in order to measure solution concentration in blend tank.
(2), establishing allotment solution aimed concn is , target volume is ; The solution concentration existing at present in blend tank is , volume is , owing to being the surplus solution of last allotment, therefore , for known; The concentration of the solution 1 of allocating is , volume is , the concentration of solution 2 is , volume is ..., solution concentration be , volume is .Their relation can be by following equation expression:
Known when solution concentration, according to " right-angled intersection method ", realize by multiple percentage concentration solution mixed preparing desired concn solution.If for concentration solution concentration from high to low, for concentration solution from high to low volume required, for wanting to join the concentration of solution, for wanting to join the volume of solution.If all be greater than , all be less than , wherein for a kind of solution concentration wherein, have
:
In formula be required solution volume.
Owing to having carried volume to be in blend tank when obtaining each solution concentration solution, so, also need volume to be raw material.
(3), the concentration of automatic acquisition input solution, method is: to delivered volume in blend tank, be first solution ( < ), after utilizing densimeter to measure after mixing to mix, solution concentration is , can obtain by following formula:
To delivered volume in blend tank, be again solution 2( < ), after utilizing densimeter to measure after mixing to mix, solution concentration is , can obtain by following formula:
By that analogy, to delivered volume in blend tank, be solution ( < ), can obtain by following formula:
If blend tank cross-sectional area is ( for fixed value), the liquid level of measuring is in real time , liquor capacity .Above formula can be expressed as by liquid level:
CN201310540568.8A 2013-11-05 2013-11-05 Method for automatically regulating concentration of ethanol Pending CN103551064A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106422858A (en) * 2016-11-04 2017-02-22 苏州浙远自动化工程技术有限公司 Automatic alcohol concentration regulating device and method
CN107281972A (en) * 2017-05-11 2017-10-24 广东卓信环境科技股份有限公司 The standard control method and device that material is prepared
CN107970472A (en) * 2016-10-21 2018-05-01 伊西康公司 Carried out disinfection agent dynamic dosage by concentrate compensation of degrading
CN109012444A (en) * 2018-08-02 2018-12-18 迪瑞医疗科技股份有限公司 A kind of concentration washing lotion automatic mixing system and matching method

Citations (3)

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Publication number Priority date Publication date Assignee Title
WO2007045509A1 (en) * 2005-10-21 2007-04-26 Lonza Ag Mass flow rate control system
CN201316603Y (en) * 2008-12-12 2009-09-30 河北工业大学 Liquid mixing vessel
CN102553489A (en) * 2011-12-31 2012-07-11 钦州华成自控设备有限公司 Automatic acid preparation method and device for phosphoric acid in sugar refinery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007045509A1 (en) * 2005-10-21 2007-04-26 Lonza Ag Mass flow rate control system
CN201316603Y (en) * 2008-12-12 2009-09-30 河北工业大学 Liquid mixing vessel
CN102553489A (en) * 2011-12-31 2012-07-11 钦州华成自控设备有限公司 Automatic acid preparation method and device for phosphoric acid in sugar refinery

Non-Patent Citations (1)

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Title
姬翠翠等: ""矿用乳化液浓度自动检测与配比技术比较研究"", 《煤炭科学技术》, vol. 35, no. 11, 30 November 2007 (2007-11-30) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107970472A (en) * 2016-10-21 2018-05-01 伊西康公司 Carried out disinfection agent dynamic dosage by concentrate compensation of degrading
CN106422858A (en) * 2016-11-04 2017-02-22 苏州浙远自动化工程技术有限公司 Automatic alcohol concentration regulating device and method
CN107281972A (en) * 2017-05-11 2017-10-24 广东卓信环境科技股份有限公司 The standard control method and device that material is prepared
CN107281972B (en) * 2017-05-11 2020-10-27 广东卓信环境科技股份有限公司 Standard control method and device for material preparation
CN109012444A (en) * 2018-08-02 2018-12-18 迪瑞医疗科技股份有限公司 A kind of concentration washing lotion automatic mixing system and matching method

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Application publication date: 20140205