CN102755974A - Chemical cleaning and heating device and heating method thereof - Google Patents
Chemical cleaning and heating device and heating method thereof Download PDFInfo
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- CN102755974A CN102755974A CN2011101070351A CN201110107035A CN102755974A CN 102755974 A CN102755974 A CN 102755974A CN 2011101070351 A CN2011101070351 A CN 2011101070351A CN 201110107035 A CN201110107035 A CN 201110107035A CN 102755974 A CN102755974 A CN 102755974A
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- chemical cleaning
- clear liquid
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Abstract
The invention discloses a chemical cleaning and heating device capable of preventing a chemical cleaning groove welding joint from being corroded by an alkali liquor to generate phenomenon of caustic embrittlement and a heating method thereof. According to the invention, the device adopts a structure as follows: a chemical cleaning groove (1) is welded with a flat-bottom groove valve (2); the flat-bottom groove valve (2) is connected with a centrifugal pump (4) by a low temperature chemical cleaning liquor pipeline (3); the centrifugal pump (4) is connected with a single sleeve preheater (5) by a low temperature chemical cleaning liquor pipeline (3); the single sleeve preheater (5) is connected with a user by a high temperature chemical cleaning liquor pipeline (6); and the user is connected with the chemical cleaning groove (1) by a pipeline. According to the invention, as a chemical cleaning groove heater is arranged on a discharging pipe outside the chemical cleaning groove, a chemical cleaning liquor is pumped into the single sleeve preheater by the centrifugal pump, heated by new vapor to a temperature required by the production and conveyed to each position where the chemical cleaning liquor is needed by the user in the production; and finally, the chemical cleaning liquor returning into the chemical cleaning groove is also cooled to a lower temperature state. The chemical cleaning and heating device disclosed by the invention has the advantages of simple structure, convenience in use and cost conservation; and potential safety hazards in the production are reduced.
Description
Technical field
The present invention relates to a kind of Chemical cleaning slot weld be corroded the Chemical cleaning heater and heating means thereof of generation " caustic embrittlement " phenomenon of preventing, belong to alumina producer corrosion protection of equipment technical field.
Background technology
In alumina producer; The alkali lye storage tank is generally used the carbon steel material welding production, but because the carbon steel welded seam is prone to take place the characteristic of corrosion in alkali lye, is easy to cause the caustic corrosion of carbon steel equipment to damage in the operation; Most typical is exactly the stress corrosion cracking of carbon steel, promptly usually said " caustic embrittlement ".The corrosion rate of carbon steel in alkali lye is relevant with the pH value and the temperature of alkali lye, and the high more corrosion rate of pH value is fast more, and the high more corrosion rate of temperature is fast more.The stress corrosion cracking phenomenon more than 50 ℃, all possibly take place in the four corner of NaOH concentration more than 5% in temperature in carbon steel, and NaOH concentration is the most dangerous when 30% left and right sides.The chemical cleaning solution that alumina producer is laid in the Chemical cleaning groove need be heated to 105 ℃ usually, changes clear groove set inside single-sleeve preheating device, changes clear liquid concentration and is about 320g/L, and percent concentration is about 35%.Therefore, deposit alkali lye is easy to take place " caustic embrittlement " phenomenon with the Chemical cleaning slot weld, in case weld seam " caustic embrittlement " phenomenon takes place, the alkali lye storage tank produces and leaks, and will bring potential safety hazard to the aluminium oxide ordinary production.
Summary of the invention
The technical problem that the present invention will solve is: a kind of Chemical cleaning heater and heating means thereof are provided, are easy to take place deficiencies such as " caustic embrittlement " phenomenon to overcome the Chemical cleaning slot weld that prior art exists.
The present invention constitutes like this: Chemical cleaning groove and the welding of flat-bottom slot valve; The flat-bottom slot valve is connected with centrifugal pump through low temperature clear liquid pipeline; Centrifugal pump is connected with the single-sleeve preheating device through low temperature clear liquid pipeline; The single-sleeve preheating device is connected with the user through high temperature clear liquid pipeline, and the user is connected with the Chemical cleaning groove through pipeline.
Method of the present invention be achieved in that the low temperature clear liquid in the Chemical cleaning groove flow through the flat-bottom slot valve, through low temperature clear liquid pipeline; By centrifugal pump it is squeezed into the single-sleeve preheating device; After heating low temperature clear liquid, being transformed into condensed water in the outer tube of initial steam entering single-sleeve preheating device discharges; Be heated to temperature required behind the low temperature clear liquid process single-sleeve preheating device; Through high temperature clear liquid pipeline the thermalization clear liquid is delivered to user's desired location, the temperature reduction was returned in the Chemical cleaning groove again after the high temperature clear liquid was accomplished cleaning.
Owing to adopted technique scheme; The present invention changes in the past in the method for changing clear groove set inside heater; It is outside to change the clear groove of clear being arranged on of tank heater, and the change clear liquid of deposit in changing clear groove is the low temperature clear liquid, and centrifugal pump is squeezed into the single-sleeve preheating device with the low temperature clear liquid; Change clear liquid after changing the high temperature clear liquid after the Steam Heating into and being delivered to each production desired location via high temperature clear liquid pipeline; The change clear liquid of the clear groove of returning is reduced to the lower temperature state again, and the change clear liquid in the clear groove of making remains low-temperature condition always like this, can be heated to be the condition of high temperature and produce requiredization clear liquid.Both satisfied the production needs, reached the clear slot weld of preventing again by the purpose of alkali liquid corrosion.Therefore; Compared with prior art; The present invention not only have can the clear slot weld of preventing by alkali liquid corrosion; I.e. " caustic embrittlement " phenomenon of stress corrosion cracking takes place, but also has advantages such as service life simple in structure, easy to use, that practice thrift potential safety hazard, the clear groove of prolongationization in cost, the minimizing production.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention.
The specific embodiment
Embodiments of the invention: the structure of apparatus of the present invention is: Chemical cleaning groove 1 and 2 welding of flat-bottom slot valve; Flat-bottom slot valve 2 is connected with centrifugal pump 4 through low temperature clear liquid pipeline 3; Centrifugal pump 4 is connected with single-sleeve preheating device 5 through low temperature clear liquid pipeline 3; Single-sleeve preheating device 5 is connected with the user through high temperature clear liquid pipeline 6, and the user is connected with Chemical cleaning groove 1 through pipeline.
During work; Open flat-bottom slot valve 2 and emit the low temperature clear liquid of deposit in changing clear groove 1; Get into centrifugal pump 4 through low temperature clear liquid pipeline 3; Centrifugal pump 4 is squeezed into single-sleeve preheating device 5 with the low temperature clear liquid, and the low temperature clear liquid is heated to about 105 ℃ by initial steam in single-sleeve preheating device 5, and initial steam changes condensed water into after heating process discharges; Through high temperature clear liquid pipeline 6 the thermalization clear liquid is delivered to each desired location of user, the temperature reduction was returned in the Chemical cleaning groove 1 again after the high temperature clear liquid was accomplished cleaning.
Claims (2)
1. Chemical cleaning heater; It is characterized in that: Chemical cleaning groove (1) and flat-bottom slot valve (2) welding; Flat-bottom slot valve (2) is connected with centrifugal pump (4) through low temperature clear liquid pipeline (3); Centrifugal pump (4) is connected with single-sleeve preheating device (5) through low temperature clear liquid pipeline (3), and single-sleeve preheating device (5) is connected with the user through high temperature clear liquid pipeline (6), and the user is connected with Chemical cleaning groove (1) through pipeline.
2. the heating means of a Chemical cleaning heater as claimed in claim 1; It is characterized in that: the low temperature clear liquid of Chemical cleaning groove (1) lining flow through flat-bottom slot valve (2), through low temperature clear liquid pipeline (3); By centrifugal pump (4) it is squeezed into single-sleeve preheating device (5); After heating low temperature clear liquid, being transformed into condensed water in the outer tube of initial steam entering single-sleeve preheating device (5) discharges; Be heated to temperature required behind the low temperature clear liquid process single-sleeve preheating device (5); Through high temperature clear liquid pipeline (6) the thermalization clear liquid is delivered to user's desired location, the temperature reduction was returned in the Chemical cleaning groove (1) again after the high temperature clear liquid was accomplished cleaning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101070351A CN102755974A (en) | 2011-04-27 | 2011-04-27 | Chemical cleaning and heating device and heating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101070351A CN102755974A (en) | 2011-04-27 | 2011-04-27 | Chemical cleaning and heating device and heating method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102755974A true CN102755974A (en) | 2012-10-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101070351A Pending CN102755974A (en) | 2011-04-27 | 2011-04-27 | Chemical cleaning and heating device and heating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102755974A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016090913A1 (en) * | 2014-12-09 | 2016-06-16 | 北京七星华创电子股份有限公司 | Online chemical liquid heating control system and method |
| CN109261629A (en) * | 2018-11-28 | 2019-01-25 | 楚天科技股份有限公司 | A kind of on-line cleaning supports system and its cleaning method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847460A (en) * | 2005-04-05 | 2006-10-18 | 贵阳铝镁设计研究院 | Scale eliminating method for casing pre-heater |
| JP2006322672A (en) * | 2005-05-19 | 2006-11-30 | Ebara Kogyo Senjo Kk | Consistent cleaning method for drum type boiler scale, and cleaning system therefor |
| CN101575710A (en) * | 2009-06-23 | 2009-11-11 | 杭州锦江集团有限公司 | Chemical cleaning system |
| CN202037143U (en) * | 2011-04-27 | 2011-11-16 | 贵阳铝镁设计研究院有限公司 | Chemical cleaning and heating device |
-
2011
- 2011-04-27 CN CN2011101070351A patent/CN102755974A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847460A (en) * | 2005-04-05 | 2006-10-18 | 贵阳铝镁设计研究院 | Scale eliminating method for casing pre-heater |
| JP2006322672A (en) * | 2005-05-19 | 2006-11-30 | Ebara Kogyo Senjo Kk | Consistent cleaning method for drum type boiler scale, and cleaning system therefor |
| CN101575710A (en) * | 2009-06-23 | 2009-11-11 | 杭州锦江集团有限公司 | Chemical cleaning system |
| CN202037143U (en) * | 2011-04-27 | 2011-11-16 | 贵阳铝镁设计研究院有限公司 | Chemical cleaning and heating device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016090913A1 (en) * | 2014-12-09 | 2016-06-16 | 北京七星华创电子股份有限公司 | Online chemical liquid heating control system and method |
| CN109261629A (en) * | 2018-11-28 | 2019-01-25 | 楚天科技股份有限公司 | A kind of on-line cleaning supports system and its cleaning method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121031 |