CN202532511U - Anticorrosion biomass energy power generation flue and flue gas waste heat recovery device - Google Patents
Anticorrosion biomass energy power generation flue and flue gas waste heat recovery device Download PDFInfo
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- CN202532511U CN202532511U CN2012201113802U CN201220111380U CN202532511U CN 202532511 U CN202532511 U CN 202532511U CN 2012201113802 U CN2012201113802 U CN 2012201113802U CN 201220111380 U CN201220111380 U CN 201220111380U CN 202532511 U CN202532511 U CN 202532511U
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- flue gas
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- waste heat
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Abstract
The utility model relates to an anticorrosion biomass energy power generation flue and flue gas waste heat recovery device, wherein a zinc-aluminum alloy layer is sprayed on a surface where the anticorrosion biomass energy power generation flue and flue gas waste heat recovery device is in contact with glue gas, and an organic coating confining layer is coated on the zinc-aluminum alloy layer. According to the utility model, the problem of corrosion caused by acidic flue gas after the anticorrosion biomass energy power generation flue and flue gas waste heat recovery device is placed in a flue gas environment for a long time is solved and the service life of the anticorrosion biomass energy power generation flue and flue gas waste heat recovery device is prolonged.
Description
Technical field
The utility model relates to a kind of anticorrosion biomass power generation flue, flue gas waste heat recovery apparatus.
Background technology
Along with China's rapid economy development; Increasing to demands for energy; And the reserves of traditional energies such as coal, oil, natural gas are exhausted day by day; Make the exploitation of new and renewable sources of energy more and more come into one's own, also got development fast as the utilization of the biomass energy of regenerative resource important component part, but since China the research of biomass energy is started late; The just thing of recent years is used also in the commercialization of biomass energy; Especially still exist many need the exploration and the problems of research at the biomass power generation technical elements, owing to lack perfect theoretical basis and enough experience accumulation, make Electric Design unit run into certain difficulty aspect the design of biomass power generation factory and the lectotype selection.Flue gas corrosion property analysis to biomass fermentation power plant; Found that ash content is alkaline behind the biomass fuel combustion that present biomass power generation adopts; But flue gas is acid, and is rich in chlorion, and its etching characteristic obviously is different from the flue gas of coal-burning power plant; When discharged at lower temperature, have very strong corrosivity, ordinary carbon steel can be bored a hole because of corrosion very soon in the waste heat recovery apparatus at present.To the characteristics that the metal material of present biomass power generation fume afterheat utilization is corroded easily, improve the corrosivity of metal parts in the waste heat recovery apparatus with coating technology.Although stainless steel can improve corrosion resistance greatly, cost is expensive.
Summary of the invention
The purpose of the utility model is that the characteristics that are directed against the biomass power generation flue gas corrosion provide a kind of anticorrosion biomass power generation flue, flue gas waste heat recovery apparatus.
The technical scheme that the utility model is taked is:
A kind of anticorrosion biomass power generation flue, flue gas waste heat recovery apparatus are sprayed with the allumen layer on biomass power generation flue, flue gas waste heat recovery apparatus and surface that flue gas contacts, be coated with the organic coating confining bed on the allumen layer.
Described organic coating is an epoxy resin layer, and thickness is the 0.1-1.5 millimeter.
The utility model anti-corrosion coating adopts aluminium or aluminium zinc cold spraying significant feature that 2 points are arranged, and one is to form the intrusion that passivating film stops chlorion, and this effect mainly is to rely on aluminium to accomplish; Another forms the protective anode cell reaction; Just because the corrosion potential of aluminium or zinc is lower than carbon steel; And that the flue gas of living beings also has except chlorion is certain acid, can form galvanic corrosion under the situation of dew point being lower than, and at this time has earlier corrosion aluminium or zinc and protects plain steel.Spray the situation of aluminum and zinc at the same time, the corrosion potential of zinc is lower than aluminium, and at this time preferential corrosion zinc and protect aluminium can postpone the corrosion to matrix, so recommend to use cold spraying aluminium zinc mixed-powder.After having prepared sprayed coating, also to use epoxy resin to carry out sealing of hole, because there is the hole of 2-10% in the coating of cold spraying, medium immerses the corrosion rate that will greatly increase by the protection body if these holes are corroded.See from result of use; It is best that these two steps are used in combination, and uses the cold spraying coating to have hole separately, uses epoxy resin to have the problem of thermally-stabilised difference separately; Place for a long time and have the embrittlement problem that comes off under the flue gas environment; Above-mentioned steps is used in combination can avoid this problem, and the main effect of epoxy resin is a sealing of hole, is difficult to come off in case can form the pinning effect after getting in the hole.Can be behind the use epoxy resin sealing of hole than the life-span of sealing of hole is improved 0.5-1 doubly.
Description of drawings
Fig. 1 is a Comparative Examples product corrosion resistance electrochemistry curve;
Fig. 2 is the utility model embodiment 1 product corrosion resistance electrochemistry curve;
Fig. 3 is the utility model structure chart;
Wherein, 1. biomass power generation flue, flue gas waste heat recovery apparatus, 2. allumen layer, 3. organic coating confining bed.
The specific embodiment
Below in conjunction with embodiment the utility model is further specified.
Embodiment 1
A kind of anticorrosion biomass power generation flue, flue gas waste heat recovery apparatus are sprayed with allumen layer 2 on biomass power generation flue, flue gas waste heat recovery apparatus 1 and surface that flue gas contacts, be coated with organic coating confining bed 3 on the allumen layer 2.
The preparation method: adopt cold spray technique, the sprayed particle degree is pure Al powder of 300-500 purpose and zinc powder, and wherein the weight ratio of Al powder and zinc powder is 70: 30.Before dusty spray uses under 120 ℃ of conditions dried 30min, the spraying carrier gas is a high pressure nitrogen.The carrier gas temperature is 150 ℃ in the spraying process, nebulizer gas pressure 1.6Mpa, spray distance 25mm, powder feeding rate 1.6g/s.Spraying back porosity is 6%.Having sprayed the back applies with the epoxy resin that toluene (volume content 15%) dilutes.
A kind of anticorrosion biomass power generation flue, flue gas waste heat recovery apparatus are sprayed with allumen layer 2 on biomass power generation flue, flue gas waste heat recovery apparatus 1 and surface that flue gas contacts, be coated with organic coating confining bed 3 on the allumen layer 2.
The preparation method: adopt cold spray technique, the sprayed particle degree is pure Al powder of 300-500 purpose and zinc powder, and wherein the weight ratio of Al powder and zinc powder is that the weight ratio of wherein Al powder and zinc powder is 50: 50.Before dusty spray uses under 120 ℃ of conditions dried 30min, the spraying carrier gas is a high pressure nitrogen.The carrier gas temperature is 200 ℃ in the spraying process, nebulizer gas pressure 2.0Mpa, spray distance 30mm, powder feeding rate 1g/s.Spraying back porosity is 7%.Having sprayed the back applies with the epoxy resin that epoxy propane butyl ether (volume content 20%) dilutes.
A kind of anticorrosion biomass power generation flue, flue gas waste heat recovery apparatus are sprayed with allumen layer 2 on biomass power generation flue, flue gas waste heat recovery apparatus 1 and surface that flue gas contacts, be coated with organic coating confining bed 3 on the allumen layer 2.
The preparation method: adopt cold spray technique, the sprayed particle degree is pure Al powder of 300-500 purpose and zinc powder, and wherein the weight ratio of Al powder and zinc powder is that the weight ratio of wherein Al powder and zinc powder is 75: 25.Before dusty spray uses under 120 ℃ of conditions dried 40min, the spraying carrier gas is a high pressure nitrogen.The carrier gas temperature is 250 ℃ in the spraying process, nebulizer gas pressure 2.5Mpa, spray distance 40mm, powder feeding rate 1.8g/s.Spraying back porosity is 7%.Having sprayed the back applies with the epoxy resin that diglycidyl ether (volume content 20%) dilutes.
Comparative Examples
A kind of anticorrosion biomass power generation flue, flue gas waste heat recovery apparatus are sprayed with aluminium lamination on biomass power generation flue, flue gas waste heat recovery apparatus and surface that flue gas contacts.Adopt cold spray technique, the sprayed particle degree is the pure Al powder of 300-500 purpose.Before dusty spray uses under 120 ℃ of conditions dried 30min, the spraying carrier gas is a high pressure nitrogen.Carrier gas temperature 250 degree in the spraying process, nebulizer gas pressure 2Mpa, spray distance 30mm, powder feeding rate 1.5g/s.Spraying back porosity is 8%.
Electro-chemical test
Simulation biomass combustion smoke solution with configuration (promptly is mixed with the chloro ion-containing solution of chlorine ion concentration 1wt% with potassium chloride; With chloro ion-containing solution with sulphur acid for adjusting pH value to 4.0; Form acid etching solution) carry out electro-chemical test, the Comparative Examples test result is as shown in Figure 1.Cated corrosion potential is starkly lower than carbon steel, mean the corrosive environment floating coat will preferentially corrode and play the protection matrix effect.
Embodiment 1 test result is as shown in Figure 2.Cated corrosion potential is apparently higher than carbon steel, this be epoxy resin in action because epoxy resin is insensitive to acid corrosion; Greatly improve the corrosion potential of coating, mean that at the corrosion initial stage, this resin bed is protective finish effectively; Passing along with service time; This resinous coat is ineffective gradually owing to wear out, and exposes the aluminium spelter coating, and at this time the aluminium spelter coating begins to play the effect in the Comparative Examples.
Claims (2)
1. an anticorrosion biomass power generation flue, flue gas waste heat recovery apparatus is characterized in that, on biomass power generation flue, flue gas waste heat recovery apparatus and surface that flue gas contacts, are sprayed with the allumen layer, are coated with the organic coating confining bed on the allumen layer.
2. anticorrosion biomass power generation flue according to claim 1, flue gas waste heat recovery apparatus is characterized in that described organic coating is an epoxy resin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201113802U CN202532511U (en) | 2012-03-22 | 2012-03-22 | Anticorrosion biomass energy power generation flue and flue gas waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201113802U CN202532511U (en) | 2012-03-22 | 2012-03-22 | Anticorrosion biomass energy power generation flue and flue gas waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202532511U true CN202532511U (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201113802U Expired - Fee Related CN202532511U (en) | 2012-03-22 | 2012-03-22 | Anticorrosion biomass energy power generation flue and flue gas waste heat recovery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602082A (en) * | 2012-03-22 | 2012-07-25 | 山东电力工程咨询院有限公司 | Anti-corrosion biomass energy generating flue, flue gas waste heat recovery device and preparation method of the anti-corrosion biomass energy |
-
2012
- 2012-03-22 CN CN2012201113802U patent/CN202532511U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602082A (en) * | 2012-03-22 | 2012-07-25 | 山东电力工程咨询院有限公司 | Anti-corrosion biomass energy generating flue, flue gas waste heat recovery device and preparation method of the anti-corrosion biomass energy |
| CN102602082B (en) * | 2012-03-22 | 2014-09-03 | 山东电力工程咨询院有限公司 | Anti-corrosion biomass energy generating flue, flue gas waste heat recovery device and preparation method of the anti-corrosion biomass energy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20150322 |
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| EXPY | Termination of patent right or utility model |