CN102616761A - Automatic temperature control system for crystallized phosphoric acid production - Google Patents
Automatic temperature control system for crystallized phosphoric acid production Download PDFInfo
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- CN102616761A CN102616761A CN2012101021913A CN201210102191A CN102616761A CN 102616761 A CN102616761 A CN 102616761A CN 2012101021913 A CN2012101021913 A CN 2012101021913A CN 201210102191 A CN201210102191 A CN 201210102191A CN 102616761 A CN102616761 A CN 102616761A
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- heat exchanger
- phosphoric acid
- control valve
- automatic
- automatic control
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Abstract
The invention discloses an automatic temperature control system for crystallized phosphoric acid production, which comprises a crystallizer and plate-type heat exchangers; and the automatic temperature control system is characterized in that the number of the plate-type heat exchanger is two, one is a refrigerating heat exchanger, and the other one is a heating heat exchanger, the two plate-type heat exchangers are respectively provided with an automatic control valve, the crystallizer is connected with a circulating water pipe, the circulating water pipe is connected with an automatic control valve, the crystallizer and the two plate-type heat exchangers are connected in series by the circulating water pipe, and the three automatic control valves are connected to a central control DCS (distributed control system) by way of signal access. In the process of cooling operation, the DCS emits an instruction, the automatic control valve of the refrigerating heat exchanger is started, and the automatic control valve of the heating heat exchanger is closed; in the process of heating for scale removal, the automatic control valve of the heating heat exchanger is started, and the automatic control valve of the refrigerating heat exchanger is closed; and when the temperature raises to a preset value, the automatic control valve is immediately switched to a cooling state. According to the invention, the operation switching is quick, the crystallization and growing qualities of a phosphoric acid are good, and three mediums can not be confused, thereby ensuring the operation reliability and safety, so that the automatic temperature control system disclosed by the invention is suitable for the automatic temperature control of crystallized phosphoric acid production.
Description
Technical field
The present invention relates to crystallization process and produce crystal, relate in particular to a kind of crystal phosphoric acid and produce auto temperature controlled system.
Background technology
Utilize crystallization process to produce crystal phosphoric acid; The phosphoric acid crystal has higher requirement to production unit; Crystal is difficult to control, the crystallization condition requirement is harsh, need under lower temperature, carry out phosphoric acid crystallization and growing the grain, in crystallization and growing the grain process, can form brilliant dirt at the mold inwall; Along with time lengthening, brilliant dirty thickness increases.The brilliant dirt that the mold inwall adheres to can seriously hinder the transmission of heat in the cooling, so that influences rate of temperature fall, prolongs the decrease temperature crystalline time, has reduced production efficiency, has increased production cost.Should realize phosphoric acid material decrease temperature crystalline, guarantee that again the brilliant dirt of mold inwall is thin as much as possible, need be in material cools process the short period of time be rapidly heated to remove brilliant dirt, guarantee that again the crystal of separating out in the material is unlikely to dissolving.Be implemented in the process of cooling and be rapidly heated, prior art generally adopts a cover heating unit and a cover cooling device, and the working medium in two covering devices is different; Working medium is obscured easily when heating-cooling is switched, and the operation manually separately of two covering devices, inconvenience; Out of true; Exist manufacturing cost high, efficient is low, the problem that occupation area of equipment is big.
Summary of the invention
The objective of the invention is to overcome the defective of prior art; Provide a kind of crystal phosphoric acid to produce auto temperature controlled system; In the crystal phosphoric acid production process, it is dirty except that crystalline substance that the crystallization that cools realizes that simultaneously the short period of time is rapidly heated, and solves inconvenient operation manually; Coarse problem, and obscuring between the medium can not take place.
To achieve these goals, technical scheme of the present invention is following:
A kind of crystal phosphoric acid is produced auto temperature controlled system, comprises mold and plate-type heat exchanger, it is characterized in that said plate-type heat exchanger has two; One is refrigerated heat exchanger, and another is for heating interchanger, and automatically controlled valve is all established in two platen formula interchanger imports; Said mold is connected to circulating pipe; Circulating pipe is connected to automatically controlled valve, and circulating pipe is controlled DCS with mold and the series connection of two platen formula interchanger during three automatically controlled valve signals insert.
Its working medium of refrigerated heat exchanger is circulation refrigerant medium, and heating its working medium of interchanger is the cycling hot medium, and the technological cycle waterpipe of the mold of flowing through is connected mold with two platen formula interchanger, and recirculated water cools to the mold material and heats scale removal.The circulating water pipeline of mold connects automatically controlled valve; Two plate-type heat exchangers all respectively connect an automatically controlled valve; Control DCS during three valve signals insert, at DCS control place editor automatic control program, realize three self-acting valves according to temperature of charge and rate of temperature fall, the scale removal time is carried out the automatic control of valve folding and the aperture size is regulated automatically.
According to the phosphoric acid Tc, rate of temperature fall, scale removal temperature and time are write the DCS instruction: when cooling operation; DCS sends instruction; The automatically controlled valve of refrigerated heat exchanger is opened, and the automatically controlled valve that heats interchanger cuts out, can be rapidly to the technological cycle water for cooling; When the heat temperature raising scale removal, the automatically controlled valve that heats interchanger is opened, and the automatically controlled valve of refrigerated heat exchanger cuts out, can heat up to process recycled water rapidly, and quick heating, easy to control; When temperature rises to set(ting)value, automatically controlled valve switches to the cooling state immediately.The present invention is simple to operate, and whole handoff procedure is rapid, and the temperature precise control, heat up to be switched in time at cooling, and phosphoric acid crystal structure and growing the grain quality are good, and three kinds of media do not come in contact, and medium can not obscured, and has guaranteed operational reliability and security.
The present invention has simple in structure, practical, effective, easy to operate and safe advantage.
The present invention has reached predetermined purpose through the actual proof of using, and is applicable to the automatic temp control that crystal phosphoric acid is produced.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Among the figure: 1 is mold, and 2 for heating interchanger, and 3 is automatically controlled valve, and 4 is automatically controlled valve, and 5 is refrigerated heat exchanger, and 6 is automatically controlled valve, and 7 is circulating pipe.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Embodiment:
Accompanying drawing 1 has been illustrated structure of the present invention, and a kind of crystal phosphoric acid of certain phosphorus industry Ltd is produced auto temperature controlled system, comprises mold 1 and plate-type heat exchanger; It is characterized in that said plate-type heat exchanger has two, one is refrigerated heat exchanger 5, and another is for heating interchanger 2; Refrigerated heat exchanger 5 is connected to automatically controlled valve 4; Heat interchanger 2 and be connected to automatically controlled valve 3, said mold 1 connects circulating pipe 7, and circulating pipe 7 is connected to automatically controlled valve 6; Circulating pipe 7 is with mold 1 and heat interchanger 2 and refrigerated heat exchanger 5 series connection, controls DCS during automatically controlled valve 3, automatically controlled valve 4 and 6 three automatically controlled valve signals of automatically controlled valve insert.
Claims (1)
1. a crystal phosphoric acid is produced auto temperature controlled system, comprises mold and plate-type heat exchanger, it is characterized in that said plate-type heat exchanger has two; One is refrigerated heat exchanger (5); Another is for heating interchanger (2), and refrigerated heat exchanger (5) is connected to automatically controlled valve (4), heats interchanger (2) and is connected to automatically controlled valve (3); Said mold (1) connects circulating pipe (7); Circulating pipe (7) is connected to automatically controlled valve (6), and circulating pipe (7) is controlled DCS with mold (1) and the series connection of two platen formula interchanger during three automatically controlled valve signals insert.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101021913A CN102616761A (en) | 2012-04-10 | 2012-04-10 | Automatic temperature control system for crystallized phosphoric acid production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101021913A CN102616761A (en) | 2012-04-10 | 2012-04-10 | Automatic temperature control system for crystallized phosphoric acid production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102616761A true CN102616761A (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101021913A Pending CN102616761A (en) | 2012-04-10 | 2012-04-10 | Automatic temperature control system for crystallized phosphoric acid production |
Country Status (1)
| Country | Link |
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| CN (1) | CN102616761A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2527530A (en) * | 2014-06-24 | 2015-12-30 | Thermal Integration Ltd | Fluid-heating apparatus |
| CN105745510A (en) * | 2013-11-28 | 2016-07-06 | 阿尔法拉瓦尔股份有限公司 | System and method for dynamic control of a heat exchanger |
| CN107632637A (en) * | 2017-10-12 | 2018-01-26 | 浙江东成生物科技股份有限公司 | A kind of temperature control system of small size vacuum cavity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03193614A (en) * | 1989-12-21 | 1991-08-23 | Nippon Chem Ind Co Ltd | High purity phosphoric acid and its production |
| CN2833484Y (en) * | 2005-08-29 | 2006-11-01 | 灵宝市金源桐辉精炼有限责任公司 | Heat exchanger for reaction still |
| CN202028390U (en) * | 2011-01-21 | 2011-11-09 | 潍坊泉鑫化工有限公司 | Reaction kettle hot and cold coil |
| CN202558632U (en) * | 2012-04-10 | 2012-11-28 | 瓮福（集团）有限责任公司 | Automatic temperature control system for crystal phosphoric acid production |
-
2012
- 2012-04-10 CN CN2012101021913A patent/CN102616761A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03193614A (en) * | 1989-12-21 | 1991-08-23 | Nippon Chem Ind Co Ltd | High purity phosphoric acid and its production |
| CN2833484Y (en) * | 2005-08-29 | 2006-11-01 | 灵宝市金源桐辉精炼有限责任公司 | Heat exchanger for reaction still |
| CN202028390U (en) * | 2011-01-21 | 2011-11-09 | 潍坊泉鑫化工有限公司 | Reaction kettle hot and cold coil |
| CN202558632U (en) * | 2012-04-10 | 2012-11-28 | 瓮福（集团）有限责任公司 | Automatic temperature control system for crystal phosphoric acid production |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105745510A (en) * | 2013-11-28 | 2016-07-06 | 阿尔法拉瓦尔股份有限公司 | System and method for dynamic control of a heat exchanger |
| CN105745510B (en) * | 2013-11-28 | 2017-09-19 | 阿尔法拉瓦尔股份有限公司 | System and method for the dynamic control of heat exchanger |
| GB2527530A (en) * | 2014-06-24 | 2015-12-30 | Thermal Integration Ltd | Fluid-heating apparatus |
| CN107632637A (en) * | 2017-10-12 | 2018-01-26 | 浙江东成生物科技股份有限公司 | A kind of temperature control system of small size vacuum cavity |
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Application publication date: 20120801 |