LU502602B1 - A copper-chromium-based tgr-titanium membrane threaded tubular air preheater and tube membrane composition - Google Patents
A copper-chromium-based tgr-titanium membrane threaded tubular air preheater and tube membrane composition Download PDFInfo
- Publication number
- LU502602B1 LU502602B1 LU502602A LU502602A LU502602B1 LU 502602 B1 LU502602 B1 LU 502602B1 LU 502602 A LU502602 A LU 502602A LU 502602 A LU502602 A LU 502602A LU 502602 B1 LU502602 B1 LU 502602B1
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- LU
- Luxembourg
- Prior art keywords
- tgr
- copper
- chromium
- titanium
- air preheater
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
- F16L58/1072—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe the coating being a sprayed layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The present invention belongs to the technical field of energy conservation in high energy consumption industries such as new energy, high efficiency and energy conservation, and electric power, and particularly relates to a copper-chromium-based TGr-titanium membrane threaded tubular air preheater and tube membrane composition The copper-chromium-based TGr-titanium film threaded tubular air preheater and pipe film components comprise a base pipe and a copper-chromium-based TGr-titanium film layer, wherein the outer side of the base pipe is provided with the copper-chromium-based TGr-titanium film layer. The utility model has the advantages that the screw thread can increase the heating area, so that the heat transfer capacity of the air side is greatly enhanced; meanwhile, the flue gas flow rate is reasonably selected; under the ripple disturbance, there is almost no ash deposition phenomenon; the heat transfer capacity is enhanced, so that the wall temperature is increased, the low-temperature corrosion is reduced, the heat of the flue gas side is better utilized, the combustion condition is improved, and the efficiency is improved.
Description
BL-5533 :
A COPPER-CHROMIUM-BASED TGR-TITANIUM MEMBRANE 0502602
THREADED TUBULAR AIR PREHEATER AND TUBE MEMBRANE
COMPOSITION
The present invention belongs to the technical field of energy conservation in high energy consumption industries such as new energy, high efficiency and energy conservation, and electric power, and particularly relates to a copper-chromium-based TGr-titanium membrane threaded tubular air preheater and tube membrane composition
At present, low-temperature corrosion and ash blocking of air preheaters are common in both industrial boilers and utility boilers, which directly affect the safe operation, economic operation and emission of boilers and units, especially when burning high-sulfur coal. In thermal power plants in China, the air preheater accounts for 6%-8% of the total boiler investment, and the direct cost of equipment replacement and shutdown and ash cleaning caused by low-temperature corrosion and ash blocking accounts for about 4%-5% of the operating cost every year. If the loss caused by boiler shutdown accident is added, it will be even greater. At present, many power plants can only be shut down passively for maintenance and replacement due to low-temperature corrosion and ash blockage of air preheaters, or in order to avoid low-temperature corrosion and ash blockage, they do not hesitate to increase the exhaust temperature of boilers, reduce the thermal efficiency of boilers and increase emissions.
According to the calculation, the thermal efficiency of the boiler will decrease by about 1% for every 15°C increase in the exhaust temperature of the boiler, resulting in a large amount of energy loss and the discharge of complex pollutants. (Complex pollutants-including sulfur, nitrate, PM2.5 particles, dust larger than PM2.5, and other mixed air pollutants)
In the use of many power plant boilers, due to the air leakage of air preheater, the combustion is not sufficient, and the volatile matter in coal is increasing, so that the water vapor and sulfuric acid vapor contained in flue gas are being discharged in large quantities, polluting our atmospheric environment.
In order to make up for the defects of the prior art, the present invention provides a copper- chromium based TGr-titanium membrane threaded tubular air preheater and its membrane components, which are corroded and worn at low temperature and have stronger heat transfer, corrosion resistance, erosion resistance and ash blocking resistance.
The present invention is realized by the following technical scheme:
BL-5533
A copper-chromium-based TGr-titanium membrane threaded tubular air preheater and LU502602 tube membrane composition comprises a base pipe and a copper-chromium based TGr-titanium film layer, and the outer side of the base pipe is provided with the copper-chromium based TGr- titanium film layer.
Further, the weight percentages of the main components of the copper-chromium based
TGr-titanium film are TGr-50 10%, MnO, 5%, CuO 9%, N10 3%, LiCO; 2%, B203 6%, TiO; 9%, Pb:03 2%, MgO; 5%, K,0 5% and S10, 44%.
Further, the processing technology of the copper-chromium-based TGr-titanium membrane threaded tubular air preheater and tube membrane composition includes the following steps: preparing charged copper-chromium based TGr-titantum powder, pre-treating, embossing, automatic spraying, sintering, cooling and rolling, and assembling.
Further, the base pipe is a threaded pipe, and threads are arranged on the inner wall and the outer wall of the base pipe.
The present invention has the beneficial effects that: the copper-chromium-based TGr- titanium membrane threaded tubular air preheater and tube membrane composition, wherein the thread can increase the heating area, so that the heat transfer capacity of the air side is greatly enhanced; when flue gas flows, the ripple can damage the boundary layer with large thermal resistance to the maximum extent, so that the heat transfer capacity is obviously improved; meanwhile, the flue gas flow rate is reasonably selected, and the ash deposition phenomenon hardly exists under the ripple disturbance, so that the heat transfer capacity is enhanced, resulting in the increase of the wall temperature and the reduction of low-temperature corrosion.
Make better use of the heat at the flue gas side, the air entering the furnace has higher temperature, better combustion-supporting effect, improved combustion condition, expanded adaptability of coal, improved efficiency and saved energy. Meanwhile, the nickel-based oxide inside can be used as a coating transition layer to increase bonding strength and reduce stress caused by different thermal expansion coefficients.
The present invention will be further explained with reference to the accompanying drawings.
Figure 1 is a schematic structural diagram of the present invention;
Figure 2 is a partial sectional view of the present invention.
In the figure, 1 base tube, 2 Cu-Cr based TGr-Ti film.
Figures 1-2 show a specific embodiment of the present invention. The present invention discloses a copper-chromium-based TGr-titanium membrane threaded tubular air preheater and tube membrane composition, which comprises a base pipe 1 and a copper-chromium based
BL-5533
TGr-titanium film layer 2, wherein the outer side of the base pipe 1 is provided with the copper- LU502602 chromium based TGr-titanium film layer 2.
Further, the weight percentages of the main components of the copper-chromium based
TGr-titanium film layer 2 are TGr-50 10%, MnO; 5%, CuO 9%, NiO 3%, LiCOs 2%, B,0z 6%,
Ti0, 9%, Pb:0:2%, MgO; 5%, K,0 5% and SiO; 44%.
Further, the processing technology of the copper-chromium-based TGr-titanium membrane threaded tubular air preheater and tube membrane composition includes the following steps: preparing charged copper-chromium based TGr-titanium powder, pre-treating, embossing, automatic spraying, sintering, cooling and rolling, and assembling.
Further, the base pipe 1 is a threaded pipe, and threads are arranged on the inner wall and the outer wall of the base pipe 1.
The present invention relates to a copper-chromium-based TGr-titanium membrane threaded tubular air preheater and tube membrane composition, which comprises the following steps: preparing charged copper-chromium-based TGr-titanium powder, pre-processing, embossing, automatic spraying, sintering, cooling off the line, and assembling, and coating and spraying the air preheater pipe, so as to protect the air preheater pipe. Corrugation can damage the boundary layer with high thermal resistance to the maximum extent, and the heat transfer capacity is obviously improved. Under the disturbance of corrugation, there is almost no ash deposition phenomenon, and the heat transfer capacity is enhanced, which causes the wall temperature to increase, reduces low-temperature corrosion, and makes better use of the heat at the flue gas side. The air entering the furnace has a higher temperature, better combustion- supporting effect, improved combustion status, expanded coal adaptability, improved efficiency, saved energy, and enhanced hardness, fully enhanced erosion resistance and acid- alkali corrosion resistance. The heat transfer in the disturbed and destroyed stage is much stronger than that in the stable stage, and its enhancement degree depends on the Reynolds number Re of the airflow and the geometric parameters of the threaded pipe, such as pitch, convex height and apex angle. On the one hand, the thread can enhance the heat transfer process of the medium, reduce the thermal resistance between the medium and the pipe wall, and make the pipe wall temperature closer to that of the high-temperature medium, thus achieving the purpose of increasing the pipe wall temperature, fully burning coal and reducing the emission of PM2.5; the sprayed coating has high wear resistance, acid and alkali corrosion resistance, good heat transfer performance, fineness and smoothness. The copper-chromium based TGr- titanium film air preheater is replaced once every 5-8 years, which saves the cost and improves the energy utilization efficiency.
It can save three times of basic materials, effectively utilize basic materials such as steel pipes, etc., and will certainly drive product structure adjustment and industrial optimization and upgrading in the same industry, and further promote the sustainable development of social
BL-5533 economy. The whole production process of this product is an environment-friendly green LU502602 production process, and there 1s no pollution in the whole production process. The service life of this product is 2-3 times that of ordinary products. It not only solves the three major problems of corrosion, ash blocking and wear of industrial boilers for many years, but also makes better use of the waste heat and recycles the tail gas temperature. After being recovered by the air preheater, the exhaust gas temperature is reduced, saving energy, reducing the PM2.5 and compound pollutants fully discharged from combustion-supporting combustion, and reducing the pollution to the atmospheric environment.
Its technical advantages are oxidation resistance at high temperature, high wear resistance and acid and alkali corrosion resistance; the surface is delicate and smooth, and it is not easy to hang ash, which fully solves the problem of ash blocking; cu-Cr-based TGr-Ti film has higher hardness, which also solves the problem of smoke abrasion. With the addition of Cu-Cr-based
TGr-50, the abrasion resistance is enhanced, and the heat exchange effect is better. When heated to above 1100°C, it won't crack after rapid cooling and rapid heating, and the service life can be prolonged by 2-3 times. The powder synthesized by various elements of Cu-Cr-based TGr-
Ti film has the following characteristics: ©) high infiltration plating speed; @ High bonding strength; © the coating is compact and uniform; @ Simple equipment; © The advantage of pollution-free, the combination of CuO and NiO is 3:1, which makes the hardness of CuO increase many times; tGr in the copper-based TGr-titanium film is a material with strong hardness, but it is brittle, so Mn is added to increase its toughness. The combination of CuO,
NiO and TGr makes the wear resistance of its surface coating several times stronger, while
LiCO3 can enhance its acid resistance.
The present invention is not limited to the above-mentioned embodiments, and anyone should know that the same or similar technical solutions made under the inspiration of the present invention fall within the scope of protection of the present invention.
The technologies, shapes and structures not described in detail in the present invention are all known technologies.
Claims (4)
1. À copper-chromium-based TGr-titanium membrane threaded tubular air preheater and tube membrane composition, characterized by comprising a base tube and a copper-chromium based TGr-titanium membrane layer, wherein the outer side of the base tube is provided with the copper-chromium based TGr-titanium membrane layer. 5
2. A copper-chromium-based TGr-titanium membrane threaded tubular air preheater and tube membrane composition according to claim 1, characterized in that the weight percentage of the main components of the copper-chromium based TGr-titanium film is TGr-50 10%, MnO; 5%, CuO 9%, NiO 3%, LiCOs 2%, B203 6%, TiO: 9%, Pb,032%, MgO: 5%, KO 5%, S10,44%.
3. The processing technology of a copper-chromium-based TGr-titanium membrane threaded tubular air preheater and tube membrane composition according to claim 1, which is characterized by comprising the following steps: preparation of charged copper-chromium based TGr-titanium powder, pretreatment, embossing, automatic spraying, sintering, cooling and rolling, and assembly.
4. A copper-chromium-based TGr-titanium membrane threaded tubular air preheater and tube membrane composition according to claim 1, characterized in that the base pipe is a threaded pipe, and threads are arranged on the inner wall and the outer wall of the base pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU502602A LU502602B1 (en) | 2022-07-28 | 2022-07-28 | A copper-chromium-based tgr-titanium membrane threaded tubular air preheater and tube membrane composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU502602A LU502602B1 (en) | 2022-07-28 | 2022-07-28 | A copper-chromium-based tgr-titanium membrane threaded tubular air preheater and tube membrane composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU502602B1 true LU502602B1 (en) | 2023-01-30 |
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ID=85113064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU502602A LU502602B1 (en) | 2022-07-28 | 2022-07-28 | A copper-chromium-based tgr-titanium membrane threaded tubular air preheater and tube membrane composition |
Country Status (1)
| Country | Link |
|---|---|
| LU (1) | LU502602B1 (en) |
-
2022
- 2022-07-28 LU LU502602A patent/LU502602B1/en active IP Right Grant
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| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20230130 |