CN101372350A - Control system and control method for alkali liquor preparing system - Google Patents
Control system and control method for alkali liquor preparing system Download PDFInfo
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- CN101372350A CN101372350A CNA2007100125596A CN200710012559A CN101372350A CN 101372350 A CN101372350 A CN 101372350A CN A2007100125596 A CNA2007100125596 A CN A2007100125596A CN 200710012559 A CN200710012559 A CN 200710012559A CN 101372350 A CN101372350 A CN 101372350A
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- alkali
- microprocessor
- alkalimeter
- lye
- control
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Abstract
The invention discloses a method for controlling an alkali liquor adjusting system used in a chemical production system, in particular relates to a method for controlling an alkali liquor adjusting system used in a system for producing alumina by Bayer process. The invention provides a control system and a control method of the alkali liquor adjusting system, wherein, the structure of the control system is as follows: an output end of a seed precipitation mother liquor alkalimeter for detecting soda concentration of seed precipitation mother liquor and an output end of an evaporation mother liquor alkalimeter for detecting soda concentration of evaporation mother liquor are connected with the input end of a microprocessor; the output end of the microprocessor is connected with variable frequency speed regulation pumps for controlling the flow rate of the alkali liquor. The method increases the adjusting effect of the alkali liquor adjusting system, and can obtain good proportioning result even the proportioning raw alkali ingredients fluctuate.
Description
Technical field
The present invention relates to the control method of alkali liquor preparing system in chemical producing system, relate in particular to the control method of alkali liquor preparing system in the bayer's process alumina producing system.
Background technology
Need the proportioning stoste kind of allocating many in the alkali liquor preparing process, and the production of lower procedure is strict to deployed finished product alkali lye, therefore uses which kind of control method allotment alkali lye, important meaning is arranged realizing the allotment result.
Patent CN1837052A has introduced a kind of method of alkali liquor preparing system, but this method significant discomfort usefulness under the situation of the former alkali composition fluctuation of proportioning, and its allotment result departs from set(ting)value far away.
Summary of the invention
Technical problem to be solved by this invention provides a kind of control method of alkali liquor preparing system, and it has improved the allotment effect of alkali liquor preparing system, even the proportioning result that also can obtain under the situation of the former alkali composition fluctuation of proportioning.
In order to solve the problems of the technologies described above, the present invention is achieved in that a kind of Controlling System of alkali liquor preparing system, its structure is as follows: the output terminal that is used to detect the seed precipitation solution alkalimeter of seed precipitation solution alkali concn is connected with the input terminus of microprocessor, and the output terminal that is used to detect the mother liquid evaporation alkalimeter of mother liquid evaporation alkali concn is connected with the input terminus of microprocessor; The output terminal of microprocessor is connected with each variable-frequency control pump of control flux of alkaline liquor.
The input terminus of described microprocessor also be used to detect the mixing that mixes the back concentration of lye after the output terminal of alkali lye alkalimeter be connected.
A kind of control method of alkali liquor preparing system, it comprises the steps: that the seed precipitation solution alkalimeter flows to microprocessor with detected seed precipitation solution alkali concn signal; The mother liquid evaporation alkalimeter flows to microprocessor with the alkali concn signal of detected mother liquid evaporation; After microprocessor compares calculating with the alkali concn signal of seed precipitation solution alkali concn signal and mother liquid evaporation and the caustic liquid alkali concn of storing in it and aqueous alkali concentration, control signal is exported to each variable-frequency control pump that is used to control flux of alkaline liquor, by the alkali lye mixing formation mixing back alkali lye of each speed control by frequency variation pump delivery.
The alkali alkalimeter flows to microprocessor with detected alkali concn signal after being used to detect the described mixing that mixes the back concentration of lye, after microprocessor compares calculating, concentration of lye is identical with set(ting)value if this mixes the back, then be qualified alkali lye, if different, then send control signal and give each variable-frequency control pump with set(ting)value.
Advantage of the present invention and effect are as follows:
The present invention has improved the allotment effect of alkali liquor preparing system, even the proportioning result that also can obtain under the situation of the former alkali composition fluctuation of proportioning.
Description of drawings
Fig. 1 is that the present invention is the block diagram of the Controlling System of alkali liquor preparing system.
In the accompanying drawing: 1, seed precipitation solution alkalimeter; 2, mother liquid evaporation alkalimeter; 3, microprocessor; 4, variable-frequency control pump; 5, mix back alkali lye alkalimeter.
Embodiment
As shown in Figure 1, the Controlling System of alkali liquor preparing system of the present invention, its structure is as follows: the output terminal that is used to detect the seed precipitation solution alkalimeter 1 of seed precipitation solution alkali concn is connected with the input terminus of microprocessor 3, and the output terminal that is used to detect the mother liquid evaporation alkalimeter 2 of mother liquid evaporation alkali concn is connected with the input terminus of microprocessor 3; The output terminal of microprocessor 3 is connected with each variable-frequency control pump 4 of control flux of alkaline liquor; Be used to detect that the output terminal of alkali lye alkalimeter 5 is connected with the input terminus of microprocessor 3 after the mixing that mixes the back concentration of lye.
The control method of alkali liquor preparing system of the present invention, it comprises the steps: that seed precipitation solution alkalimeter 1 flows to microprocessor 3 with detected seed precipitation solution alkali concn signal; Mother liquid evaporation alkalimeter 2 flows to microprocessor 3 with the alkali concn signal of detected mother liquid evaporation; After microprocessor compares calculating with the alkali concn of 3 seed precipitation solution alkali concns and mother liquid evaporation and the caustic liquid alkali concn of storing in it and aqueous alkali concentration, control signal is exported to each variable-frequency control pump 4 that is used to control flux of alkaline liquor, by the alkali lye mixing formation mixing back alkali lye of each variable-frequency control pump 4 conveying.
For the proportioning result who obtains, alkali alkalimeter 5 flowed to microprocessor 3 with detected alkali concn signal after above-mentioned control method also comprised the steps: to be used to detect the described mixing that mixes the back concentration of lye, after microprocessor 3 compares calculating, concentration of lye is identical with set(ting)value if this mixes the back, then be qualified alkali lye, if different, then send control signal and give each variable-frequency control pump 4 with set(ting)value.
Claims (4)
1. the Controlling System of an alkali liquor preparing system, it is characterized in that structure is as follows: the output terminal that is used to detect the seed precipitation solution alkalimeter of seed precipitation solution alkali concn is connected with the input terminus of microprocessor, and the output terminal that is used to detect the mother liquid evaporation alkalimeter of mother liquid evaporation alkali concn is connected with the input terminus of microprocessor; The output terminal of microprocessor is connected with each variable-frequency control pump of control flux of alkaline liquor.
2. the Controlling System of alkali liquor preparing system according to claim 1, the input terminus that it is characterized in that described microprocessor also be used to detect the mixing that mixes the back concentration of lye after the output terminal of alkali lye alkalimeter be connected.
3. the control method of an alkali liquor preparing system is characterized in that it comprises the steps: that the seed precipitation solution alkalimeter flows to microprocessor with detected seed precipitation solution alkali concn signal; The mother liquid evaporation alkalimeter flows to microprocessor with the alkali concn signal of detected mother liquid evaporation; After microprocessor compares calculating with the alkali concn signal of seed precipitation solution alkali concn signal and mother liquid evaporation and the caustic liquid alkali concn of storing in it and aqueous alkali concentration, control signal is exported to each variable-frequency control pump that is used to control flux of alkaline liquor, by the alkali lye mixing formation mixing back alkali lye of each speed control by frequency variation pump delivery.
4. the control method of alkali liquor preparing system according to claim 3, it is characterized in that it also comprise the steps: to be used to detect the described mixing that mixes the back concentration of lye after the alkali alkalimeter detected alkali concn signal is flowed to microprocessor, after microprocessor compares calculating, concentration of lye is identical with set(ting)value if this mixes the back, then be qualified alkali lye, if different, then send control signal and give each variable-frequency control pump with set(ting)value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100125596A CN101372350B (en) | 2007-08-23 | 2007-08-23 | Control system and control method for alkali liquor preparing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100125596A CN101372350B (en) | 2007-08-23 | 2007-08-23 | Control system and control method for alkali liquor preparing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101372350A true CN101372350A (en) | 2009-02-25 |
| CN101372350B CN101372350B (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100125596A Expired - Fee Related CN101372350B (en) | 2007-08-23 | 2007-08-23 | Control system and control method for alkali liquor preparing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551829B (en) * | 2009-05-15 | 2010-11-10 | 中南大学 | Online predication method for concentration of export alkaline liquor of alumina evaporation device |
| CN112010333A (en) * | 2019-05-29 | 2020-12-01 | 沈阳铝镁设计研究院有限公司 | Method for online control of dissolution liquid molecular ratio in Bayer process alumina production |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2055953U (en) * | 1989-09-28 | 1990-04-11 | 哈尔滨工业大学 | On-line automatic controller for solution ph value |
| CN1837052A (en) * | 2005-03-23 | 2006-09-27 | 贵阳铝镁设计研究院 | Method and device for preparing solution |
| CN2927144Y (en) * | 2006-06-06 | 2007-07-25 | 杜文蔚 | pH-value automatic controlling system |
| CN1951839A (en) * | 2006-11-17 | 2007-04-25 | 辽宁三和环境工程有限公司 | Method and apparatus for treating acid and alkaline waste water |
| CN201109716Y (en) * | 2007-09-20 | 2008-09-03 | 沈阳铝镁设计研究院 | Control system for alkali liquor preparing system |
-
2007
- 2007-08-23 CN CN2007100125596A patent/CN101372350B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551829B (en) * | 2009-05-15 | 2010-11-10 | 中南大学 | Online predication method for concentration of export alkaline liquor of alumina evaporation device |
| CN112010333A (en) * | 2019-05-29 | 2020-12-01 | 沈阳铝镁设计研究院有限公司 | Method for online control of dissolution liquid molecular ratio in Bayer process alumina production |
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| Publication number | Publication date |
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| CN101372350B (en) | 2010-12-08 |
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Owner name: SHENYANG ALUMINUM + MAGNESIUM ENGINEERING + RESEAR Free format text: FORMER NAME: SHENYANG ALUMINIUM AND MAGNESIUM DESIGN INST. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 110001 Heping Street, Heping District, Liaoning, Shenyang, No. 184 Patentee after: Shenyang Aluminum & Magnesium Engineering & Research Institute Co., Ltd. Address before: 110001 Heping Street, Heping District, Liaoning, Shenyang, No. 184 Patentee before: Shenyang Aluminium and Magnesium Design Institute |
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Effective date of registration: 20180314 Address after: 110101 No. 176-1 Dingxiang street, Sujiatun District, Liaoning, Shenyang Patentee after: SHENYANG BOYU TECHNOLOGY CO., LTD. Address before: 110001 Heping Street, Heping District, Liaoning, Shenyang, No. 184 Patentee before: Shenyang Aluminum & Magnesium Engineering & Research Institute Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20200823 |