CN210979826U - Biomass circulating fluidized bed furnace - Google Patents
Biomass circulating fluidized bed furnace Download PDFInfo
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- CN210979826U CN210979826U CN201921285333.8U CN201921285333U CN210979826U CN 210979826 U CN210979826 U CN 210979826U CN 201921285333 U CN201921285333 U CN 201921285333U CN 210979826 U CN210979826 U CN 210979826U
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- cyclone
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- fluidized bed
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Abstract
The utility model relates to a living beings circulation fluidized bed furnace, including furnace, cyclone and flue, furnace's exit links to each other with cyclone, cyclone's upper end is connected with the flue, cyclone's lower extreme passes through the returning charge ware and links to each other with furnace be equipped with the baffling board between furnace and the cyclone be equipped with over heater, economizer and air heater in the flue, just air heater is located the lower extreme of economizer. The utility model discloses utilize the viscidity entrapment lime-ash granule of inertia and lime-ash, let corrode and take place on the baffling board, the periodic replacement baffling board to protected cyclone and over heater boiler tube not corroded, prolonged life, reduced manufacturing cost.
Description
Technical Field
The utility model relates to a fluidizing device, in particular to a biomass circulating fluidized bed furnace.
Background
Biomass energy accounts for about 14% of the global primary energy, and is the fourth largest energy source following coal, oil and natural gas. In developing countries, biomass is a very important energy source, providing about 35% of the energy demand. The biomass is an environment-friendly fuel, contains lower sulfur and ash content, generates less environmental pollution, however, compared with coal, the biomass has higher alkali metal (potassium and sodium) content, and meanwhile, the grass biomass fuel has higher chlorine element content, which all cause serious high-temperature corrosion problems of biomass boilers and organic heat carrier boilers. The high-temperature corrosion directly causes the occurrence of leakage events, and influences the operation safety and stability of the biomass furnace unit, so that the high-temperature corrosion precaution measures of the biomass furnace have great significance.
According to relevant research data, the mechanism of high-temperature corrosion is that during the combustion process of biomass, a large amount of chlorine and sulfur elements and volatile alkali metal elements (such as potassium and sodium) enter flue gas in a vapor form, and micron-sized alkali metal chlorides (sodium chloride and potassium chloride) are formed through homogeneous reaction and are condensed and deposited on the pipe wall with lower temperature. The alkali metal chlorides (sodium chloride and potassium chloride) that condense and deposit on the outer surface of the tubes will react with the sulfur dioxide in the flue gas by sulfation to produce chlorine. Chlorine gas diffuses to react with iron element in the tube to generate ferric chloride, and the ferric chloride is gasified and diffuses to the smoke direction through the scale layer. Because the partial pressure of oxygen is high, namely under the condition of oxidizing atmosphere, ferric chloride reacts with oxygen to generate ferric oxide and chlorine. Chlorine gas is in a free state and can react with the metal again (diffused to the interface of the metal and the corrosion layer), and the furnace tube is repeatedly used for indicating the formation of the dispersed iron oxide corrosion layer. These corrosion reactions occur in the 730-650 ℃ region, and data show that the high temperature corrosion rate can reach 1.5-2 mm per year.
At present, measures for high-temperature corrosion are generally adopted by spraying inorganic closed anticorrosive coatings or surfacing high-temperature corrosion-resistant metal outside the outer walls of the furnace tube and the superheater in the area, and the measures can delay corrosion but cannot fundamentally solve the risk of corrosion of the furnace tube.
Disclosure of Invention
The utility model aims to solve the technical problem that to the not enough of prior art, provide an utilize viscidity entrapment lime-ash granule of inertia and lime-ash, let the corruption take place on the baffling board to the biomass circulation fluidized bed furnace of protection boiler tube.
The purpose of the utility model is realized through the following technical scheme: the utility model relates to a living beings circulation fluidized bed furnace, including furnace, cyclone and flue, furnace's exit links to each other with cyclone, cyclone's upper end is connected with the flue, cyclone's lower extreme links to each other with furnace through returning the glassware be equipped with the baffling board between furnace and the cyclone be equipped with over heater, economizer and air heater in the flue, just air heater is located the lower extreme of economizer.
Compared with the prior art, the utility model has the following advantage:
the ash particles are captured by utilizing inertia and viscosity of ash, corrosion is caused on the baffle plate, and the baffle plate is replaced periodically, so that the cyclone separator and the superheater furnace tube are protected from being corroded, the service life is prolonged, and the production cost is reduced.
Description of the drawings:
FIG. 1 is a block diagram of the present invention;
reference numbers in the figures: 1-hearth, 2-cyclone separator, 3-flue, 5-returning charge, 6-baffle plate, 7-superheater, 8-economizer and 9-air preheater.
The specific implementation mode is as follows:
in order to deepen the understanding of the present invention, the present invention will be further described in detail with reference to the following embodiments and the attached drawings, and the embodiments are only used for explaining the present invention, and do not constitute the limitation to the protection scope of the present invention.
Fig. 1 shows a biomass circulating fluidized bed furnace of the present invention: the novel furnace hearth structure comprises a hearth 1, a cyclone separator 2 and a flue 3, wherein an outlet of the hearth 1 is connected with the cyclone separator 2, the upper end of the cyclone separator 2 is connected with the flue 3, the lower end of the cyclone separator 2 is connected with the hearth 1 through a material returning device 5, a baffle plate 6 is arranged between the hearth 1 and the cyclone separator 2, a superheater 7, an economizer 8 and an air preheater 9 are arranged in the flue 3, and the air preheater 9 is located at the lower end of the economizer 8.
The biomass is boiled and combusted in the hearth, low-melting-point salt particles such as potassium chloride, sodium chloride and the like in the smoke are blocked and intercepted by the baffle plate due to inertia and viscosity, and then the smoke is discharged through the cyclone separator, the superheater, the economizer and the air preheater, so that the cyclone separator and the superheater furnace tube are protected from being corroded.
The utility model discloses utilize the viscidity entrapment lime-ash granule of inertia and lime-ash, let corrode and take place on the baffling board, regularly change the baffling board to protected cyclone and over heater boiler tube not corroded, prolonged life, reduced manufacturing cost
The applicant further states that the present invention is to explain the method and device structure of the present invention through the above embodiments, but the present invention is not limited to the above embodiments, and all the modes of the present invention that adopt the similar structure and method to realize the objects of the present invention are all within the protection scope of the present invention.
Claims (1)
1. A biomass circulating fluidized bed furnace is characterized in that: the boiler comprises a hearth (1), a cyclone separator (2) and a flue (3), wherein an outlet of the hearth (1) is connected with the cyclone separator (2), the upper end of the cyclone separator (2) is connected with the flue (3), the lower end of the cyclone separator (2) is connected with the hearth (1) through a material returning device (5), a baffle plate (6) is arranged between the hearth (1) and the cyclone separator (2), a superheater (7), an economizer (8) and an air preheater (9) are arranged in the flue (3), and the air preheater (9) is located at the lower end of the economizer (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921285333.8U CN210979826U (en) | 2019-08-09 | 2019-08-09 | Biomass circulating fluidized bed furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921285333.8U CN210979826U (en) | 2019-08-09 | 2019-08-09 | Biomass circulating fluidized bed furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210979826U true CN210979826U (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921285333.8U Active CN210979826U (en) | 2019-08-09 | 2019-08-09 | Biomass circulating fluidized bed furnace |
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| CN (1) | CN210979826U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332528A (en) * | 2019-08-09 | 2019-10-15 | 江苏恒科新材料有限公司 | A kind of biomass circulating fluidized bed furnace |
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2019
- 2019-08-09 CN CN201921285333.8U patent/CN210979826U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332528A (en) * | 2019-08-09 | 2019-10-15 | 江苏恒科新材料有限公司 | A kind of biomass circulating fluidized bed furnace |
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