CN103012640A - Reaction container capable of preventing caustic embrittlement - Google Patents
Reaction container capable of preventing caustic embrittlement Download PDFInfo
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- CN103012640A CN103012640A CN2012105788924A CN201210578892A CN103012640A CN 103012640 A CN103012640 A CN 103012640A CN 2012105788924 A CN2012105788924 A CN 2012105788924A CN 201210578892 A CN201210578892 A CN 201210578892A CN 103012640 A CN103012640 A CN 103012640A
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- coating
- caustic embrittlement
- reaction container
- reaction vessel
- nichrome
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Abstract
The invention relates to a reaction container, and in particular relates to a reaction container capable of preventing caustic embrittlement, solving the problem that the existing reaction container for producing polyacrylamide stainless steel usually generates caustic embrittlement. The reaction container comprises a container main body, wherein a nickel-chromium alloy composite coating and a sealed non-sticky coating are coated on the inner side wall of the container main body from the inside to the outside in sequence. The reaction container is used for polyacrylamide reaction.
Description
Technical field
The present invention relates to a kind of reaction vessel, be specifically related to a kind of reaction vessel that prevents caustic embrittlement.
Background technology
At present, produce the polyacrylamide great majority and adopt front alkali addition process, add alkali cohydrolysis polymerization technique before producing polyacrylamide, reactor content is by the yellow soda ash of the acrylamide 4-5% of 24-25%, 70% water, add a small amount of sodium hydroxide, adjust pH value to 12.5-13, temperature of reaction is about 120 degree, before add the most of stainless steel that adopts of reaction vessel material that alkali is produced polyacrylamide, polymerization under these processing condition, hydrolysis is carried out in same reaction vessel, after reaction is finished, by 4 kilograms of pressure the polyacrylamide colloid that is reacted into is released from the discharge port of bottom, when colloid is pushed out and push away sky, can be stretched near the discharging sky, the stress of extruding, because the very high meeting of viscosity of polyacrylamide colloid adheres on the wall of container, so that the concentration of the sodium hydroxide at weld bond place can increase in enrichment near the discharge port, therefore near the weld bond discharge port can reach the condition of caustic embrittlement, and the caustic embrittlement of generation corrosion cracking possibility is arranged.Can emit a large amount of carbonic acid gas in the hydrolysis reaction in addition, because water vapour makes titanium dioxide produce corrosion to the stainless steel vessel tank skin more than the liquid level.
Summary of the invention
The problem of caustic embrittlement often occurs for solving the existing polyacrylamide stainless steel reaction container still of producing in the present invention, and then proposes a kind of reaction vessel that prevents caustic embrittlement.
The present invention addresses the above problem the technical scheme of taking to be: the present invention includes container body, scribble successively from inside to outside nichrome compound coating and sealing non-sticky metallic coating on the inner side-wall of container body.
The invention has the beneficial effects as follows: corrosion resistance and good of the present invention, inside coating is not fragile, the sealing non-sticky metallic coating is in case can directly keep in repair at the scene after damaging, need not again to do at the scene coating, or transport reactor back former factory and keep in repair, reduce the production maintenance cost of enterprise, improved production efficiency, reduced the loss of business capital.
Description of drawings
Fig. 1 is one-piece construction synoptic diagram of the present invention, and Fig. 2 is A place enlarged view among Fig. 1.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1 and Fig. 2, the described a kind of reaction vessel that prevents caustic embrittlement of present embodiment comprises container body 1, scribbles successively from inside to outside nichrome compound coating 2 and sealing non-sticky metallic coating 3 on the inner side-wall of container body 1.
Nichrome compound coating 2 is that nichrome and other trace rare earths form in the present embodiment; the effect of nichrome compound coating 2 be utilize nichrome the stainless steel body in corrosive medium such as carbonic acid gas; sodium hydroxide; the corrosive mediums such as yellow soda ash are kept apart; nichrome surface at first generates the mixolimnion of nickel oxide and chromic oxide; even oxidation occurs in chromium subsequently; generate chromium oxide layer; and the nickel chromium triangle of coatingsurface point eutectic oxide film is conducive to the chromium generation selective oxidation in the coating; form the brilliant protective membrane of chromic oxide and NiCr2O4 point; make coating have good corrosion and heat resistant; alkali resistant corrodibility; thereby effectively stop the generation of caustic embrittlement cracking; nichrome compound coating 2 has good sticking power with stainless steel simultaneously; can adapt to the distortion of container body 1 in normal range; do not stick up skin in the situation such as expand with heat and contract with cold; the destructions such as shelling, nichrome compound coating 2 have good wear-resistant ability.
Embodiment two: in conjunction with Fig. 2 present embodiment is described, the described a kind of sealing non-sticky metallic coating 3 that prevents the reaction vessel of caustic embrittlement of present embodiment is sealing non-sticky metallic coatings 3 that fluororesin modified ceramic non-stick coating is made.
Sealing non-sticky metallic coating 3 is take the FEVE fluorocarbon resin as main film forming substance in the present embodiment, adds nano ceramics micro mist and auxiliary agent, prepares by method of modifying; Sealing non-sticky metallic coating 3 has good self-cleaning performance, anti-contamination and wash-resistant property, good weather resisteant, chemical resistance, have high heat stability and unreactiveness, sealing non-sticky metallic coating 3 can directly keep in repair at the scene, need not again to do at the scene coating, reduce the production maintenance cost of enterprise, improved production efficiency.
Other composition and annexation are identical with embodiment one.
Embodiment three: in conjunction with Fig. 2 present embodiment is described, the thickness of the nichrome compound coating 2 of the described a kind of reaction vessel that prevents caustic embrittlement of present embodiment is 0.25mm-0.35mm.
Present embodiment can reduce the porosity of nichrome compound coating 2, process through spraying sealing non-sticky metallic coating 3 again, making the liquid of non-viscous paint penetrate into the stack of nichrome compound coating 2 goes in netted, thereby nichrome compound coating 2 holes have been guaranteed, sealing non-sticky metallic coating 3 is owing to the grappling effect of nichrome compound coating 2, so that the bonding strength of sealing non-sticky metallic coating 3 and nichrome compound coating 2 is very high.
Other composition and annexation are identical with embodiment one.
Embodiment four: in conjunction with Fig. 2 present embodiment is described, the thickness of the nichrome compound coating 2 of the described a kind of reaction vessel that prevents caustic embrittlement of present embodiment is 0.30mm.Other composition and annexation are identical with embodiment three.
Embodiment five: in conjunction with Fig. 2 present embodiment is described, the thickness of the sealing non-sticky metallic coating 3 of the described a kind of reaction vessel that prevents caustic embrittlement of present embodiment is 0.15mm-0.30mm.Other composition and annexation are identical with embodiment one or two.
Embodiment six: in conjunction with Fig. 2 present embodiment is described, the thickness of the sealing non-sticky metallic coating 3 of the described a kind of reaction vessel that prevents caustic embrittlement of present embodiment is 0.30mm.Other composition and annexation are identical with embodiment five.
Claims (6)
1. reaction vessel that prevents caustic embrittlement, it comprises container body (1), it is characterized in that: scribble successively nichrome compound coating (2) and sealing non-sticky metallic coating (3) on the inner side-wall of container body (1).
2. described a kind of reaction vessel that prevents caustic embrittlement according to claim 1, it is characterized in that: sealing non-sticky metallic coating (3) is the sealing non-sticky metallic coating (3) that fluororesin modified ceramic non-stick coating is made.
3. described a kind of reaction vessel that prevents caustic embrittlement according to claim 1, it is characterized in that: the thickness of nichrome compound coating (2) is 0.25mm-0.35mm.
4. described a kind of reaction vessel that prevents caustic embrittlement according to claim 3, it is characterized in that: the thickness of nichrome compound coating (2) is 0.30mm.
5. described a kind of reaction vessel that prevents caustic embrittlement according to claim 1 and 2, it is characterized in that: the thickness of sealing non-sticky metallic coating (3) is 0.15mm-0.30mm.
6. described a kind of reaction vessel that prevents caustic embrittlement according to claim 5, it is characterized in that: the thickness of sealing non-sticky metallic coating (3) is 0.30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105788924A CN103012640A (en) | 2012-12-27 | 2012-12-27 | Reaction container capable of preventing caustic embrittlement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105788924A CN103012640A (en) | 2012-12-27 | 2012-12-27 | Reaction container capable of preventing caustic embrittlement |
Publications (1)
| Publication Number | Publication Date |
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| CN103012640A true CN103012640A (en) | 2013-04-03 |
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| CN2012105788924A Pending CN103012640A (en) | 2012-12-27 | 2012-12-27 | Reaction container capable of preventing caustic embrittlement |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913805A (en) * | 2004-07-14 | 2007-02-14 | 钱远强 | Metal non-stick cooking utensil and its preparing method |
| CN102151075A (en) * | 2011-03-17 | 2011-08-17 | 钱远强 | Non-sticky nonrust iron pan and manufacturing method thereof |
| CN202129069U (en) * | 2011-07-13 | 2012-02-01 | 遇晓祥 | Reactor for preventing degradation reaction |
-
2012
- 2012-12-27 CN CN2012105788924A patent/CN103012640A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913805A (en) * | 2004-07-14 | 2007-02-14 | 钱远强 | Metal non-stick cooking utensil and its preparing method |
| CN102151075A (en) * | 2011-03-17 | 2011-08-17 | 钱远强 | Non-sticky nonrust iron pan and manufacturing method thereof |
| CN202129069U (en) * | 2011-07-13 | 2012-02-01 | 遇晓祥 | Reactor for preventing degradation reaction |
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Application publication date: 20130403 |