CN103785186A - Depressurizing and cooling device suitable for alkali concentration evaporator - Google Patents
Depressurizing and cooling device suitable for alkali concentration evaporator Download PDFInfo
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- CN103785186A CN103785186A CN201210421783.1A CN201210421783A CN103785186A CN 103785186 A CN103785186 A CN 103785186A CN 201210421783 A CN201210421783 A CN 201210421783A CN 103785186 A CN103785186 A CN 103785186A
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- alkali
- preheater
- end effect
- cooler
- evaporator
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Abstract
The invention discloses a depressurizing and cooling device suitable for an alkali concentration evaporator. Compared with processes of traditional devices, the position of disposing a final-effect alkali pump 10 is mainly changed and the position of the final-effect alkali pump 10 is changed from the outlet of an original final-effect evaporator 2 to the outlet of a cooler 8, and therefore the pressure supported by a first preheater 4, a second preheater 6 and the cooler 8 is reduced; the temperature of the final-effect alkali pump 10 is reduced; the integrity and overall performances of the alkali concentration evaporator are improved; long-period operation of the alkali concentration evaporator is achieved, and the requirements of the product structure in the field of ionic membrane caustic soda are met.
Description
[technical field]
The present invention relates to a kind of modified decompression heat sink that is applicable to alkali concentration evaporator in ion film caustic soda industry field.
[background technology]
Traditional 50% alkali discharging flow chart 1 in alkali concentration evaporator end effect in ion film caustic soda industry field: the discharging after the heating evaporation of end effect heater 1 and the flash concentration of last evaporator 2 of the alkali lye in alkali concentration evaporator is 50% concentration alkali, and its temperature is at 165 ℃.Be sent to end effect alkali pump 4 by end effect alkali pump feed pipe 3 and be pressurized to after 0.8MPa, through preheater one feed pipe 5, preheater 1, preheater two feed pipes 7, preheater 28, cooler feed pipe 9, cooler 10, cooler discharge nozzle 11, finally deliver to finished product 50 alkali grooves.
In above-mentioned alkali concentration evaporator end effect, in traditional 50% alkali discharging flow process, there are two major defects: (1) enters the temperature too high (165 ℃) of 50% concentration alkali of end effect alkali pump 4, cause the machine envelope cooling difficulty of end effect alkali pump 4, the machine envelope life-span is short, and alkali pump is difficult to reach long-term operation; (2) enter the pressure too high (0.8MPa) of 50% concentration alkali of preheater 1, preheater 28, cooler 10, cause the seal gasket sealing difficulty of preheater 1, preheater 28, cooler 10, very easily produce and leak, be difficult to reach long-term operation, two defects have a strong impact on alkali concentration evaporator long-term operation and evaporation efficiency for a long time.
[summary of the invention]
The present invention seeks to reduce and enter preheater 1, preheater 26,8 li of alkali lye pressure of cooler and reduction and enter 10 li of alkali liquid temperatures of end effect alkali pump, as shown in Figure 2: the discharging after the heating evaporation of end effect heater 1 and the flash concentration of last evaporator 2 of the alkali lye in alkali concentration evaporator is 50% concentration alkali, its temperature is that 165 ℃, pressure are 0.1MPa.Directly alkali lye is delivered to preheater one feed pipe 3, preheater 1, preheater two feed pipes 5, preheater 26, cooler feed pipe 7, cooler 8 and carried out three grades of Continuous Heat Transfer coolings, be 45 ℃, deliver to end effect alkali pump 10 through end effect alkali pump feed pipe 9 again and be pressurized to after 0.8MPa from cooler 8 alkali liquid temperature out, deliver to finished product 50 alkali grooves finally by end effect alkali pump discharge nozzle 11.In this end effect drawing mechanism, the pressure that enters 50% concentration alkali of preheater 1, preheater 26, cooler 8 is≤0.1MPa, greatly reduce the pressure that preheater 1, preheater 26, cooler 8 bear, the temperature that enters 50% concentration alkali of end effect alkali pump 10 is≤45 ℃, greatly reduces the temperature that end effect alkali pump 10 bears.Greatly improve integrity and the combination property of alkali concentration evaporator, realized the long-term operation of alkali concentration evaporator, met the needs of ion film caustic soda field product structure.
[accompanying drawing explanation]
Accompanying drawing 1 is traditional 50% alkali discharging flow process in alkali concentration evaporator end effect in ion film caustic soda industry field, 1 is end effect heater, and 2 is last evaporator, and 3 is end effect alkali pump feed pipe, 4 end effect alkali pumps, 5 is preheater one feed pipe, 6 preheater one, 7 preheater two feed pipes, 8 preheaters two, 9 cooler feed pipes, 10 coolers, 11 cooler discharge nozzles.
[specific embodiment]
Flow chart of the present invention is shown in Fig. 2, and Fig. 1 compares with prior device flow chart, has mainly changed the setting position of end effect alkali pump 10, the position of end effect alkali pump 10 is changed to the outlet of cooler 8 by the outlet of original last evaporator 2.The discharging after the heating evaporation of end effect heater 1 and the flash concentration of last evaporator 2 of alkali lye in alkali concentration evaporator is 50% concentration alkali, and its temperature is that 165 ℃, pressure are 0.1MPa.Directly alkali lye is delivered to preheater one feed pipe 3, preheater 1, preheater two feed pipes 5, preheater 26, cooler feed pipe 7, cooler 8 and carried out three grades of Continuous Heat Transfer coolings, in these three grades of heat transfer process, require can to overcome alkali lye from last evaporator 2 alkali lye pressure (0.1MPa) out and flow to from preheater one feed pipe 3 resistance producing end effect alkali pump 10 this section of flow processs; Be 45 ℃, deliver to end effect alkali pump 10 through end effect alkali pump feed pipe 9 again and be pressurized to after 0.8MPa from cooler 8 alkali liquid temperature out, deliver to finished product 50 alkali grooves finally by end effect alkali pump discharge nozzle 11.
The application of the present invention on alkali concentration evaporator not only reduced the pressure that preheater 1, preheater 26, cooler 8 bear, and reduce the temperature that end effect alkali pump 10 bears, integrity and the combination property of alkali concentration evaporator are greatly improved, realize the long-term operation of alkali concentration evaporator, met the needs of ion film caustic soda field product structure.
Claims (2)
1. be applicable to a decompression heat sink for alkali concentration evaporator, it is characterized in that comprising the parts compositions such as end effect heater (1), last evaporator (2), preheater one feed pipe (3), preheater one (4), preheater two feed pipes (5), preheater two (6), cooler feed pipe (7), cooler (8), end effect alkali pump feed pipe (9), end effect alkali pump (10), end effect alkali pump discharge nozzle (11).
2. a kind of decompression heat sink that is applicable to alkali concentration evaporator according to claim 1, is characterized in that the position of end effect alkali pump (10) to be arranged on the outlet of cooler (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210421783.1A CN103785186A (en) | 2012-10-30 | 2012-10-30 | Depressurizing and cooling device suitable for alkali concentration evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210421783.1A CN103785186A (en) | 2012-10-30 | 2012-10-30 | Depressurizing and cooling device suitable for alkali concentration evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103785186A true CN103785186A (en) | 2014-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210421783.1A Pending CN103785186A (en) | 2012-10-30 | 2012-10-30 | Depressurizing and cooling device suitable for alkali concentration evaporator |
Country Status (1)
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| CN (1) | CN103785186A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145265A (en) * | 1977-03-15 | 1979-03-20 | Asahi Glass Company, Ltd. | Process for concentration of caustic alkali solution produced by ion exchange membrane type electrolysis |
| CN201492958U (en) * | 2009-09-01 | 2010-06-02 | 兆光生物工程(邹平)有限公司 | Triple-effect four-body counter-flow evaporator |
| CN102171148A (en) * | 2008-08-07 | 2011-08-31 | 西湖乙烯公司 | Catholyte heat recovery evaporator and method of use |
| CN102631789A (en) * | 2012-02-09 | 2012-08-15 | 东营华泰化工集团有限公司 | Evaporation falling film concentration technique |
| CN202440318U (en) * | 2012-02-07 | 2012-09-19 | 张健 | Alkali-manufacturing device for producing alkali by means of three-section falling film coal-burning method |
| CN202880912U (en) * | 2012-02-24 | 2013-04-17 | 北海南化技术服务有限责任公司 | Decompressing and cooling device suitable for III-effect alkali concentration evaporator |
-
2012
- 2012-10-30 CN CN201210421783.1A patent/CN103785186A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145265A (en) * | 1977-03-15 | 1979-03-20 | Asahi Glass Company, Ltd. | Process for concentration of caustic alkali solution produced by ion exchange membrane type electrolysis |
| CN102171148A (en) * | 2008-08-07 | 2011-08-31 | 西湖乙烯公司 | Catholyte heat recovery evaporator and method of use |
| CN201492958U (en) * | 2009-09-01 | 2010-06-02 | 兆光生物工程(邹平)有限公司 | Triple-effect four-body counter-flow evaporator |
| CN202440318U (en) * | 2012-02-07 | 2012-09-19 | 张健 | Alkali-manufacturing device for producing alkali by means of three-section falling film coal-burning method |
| CN102631789A (en) * | 2012-02-09 | 2012-08-15 | 东营华泰化工集团有限公司 | Evaporation falling film concentration technique |
| CN202880912U (en) * | 2012-02-24 | 2013-04-17 | 北海南化技术服务有限责任公司 | Decompressing and cooling device suitable for III-effect alkali concentration evaporator |
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| PB01 | Publication | ||
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| DD01 | Delivery of document by public notice |
Addressee: BEIHAI NANHUA TECHNICAL SERVICE CO., LTD. Document name: Notification that Application Deemed to be Withdrawn |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140514 |