CN202002308U - Three-return-stroke environment-friendly and energy-saving hot-blast stove - Google Patents
Three-return-stroke environment-friendly and energy-saving hot-blast stove Download PDFInfo
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- CN202002308U CN202002308U CN2011200916306U CN201120091630U CN202002308U CN 202002308 U CN202002308 U CN 202002308U CN 2011200916306 U CN2011200916306 U CN 2011200916306U CN 201120091630 U CN201120091630 U CN 201120091630U CN 202002308 U CN202002308 U CN 202002308U
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Abstract
The utility model discloses a three-return-stroke environment-friendly and energy-saving hot-blast stove. The hot-blast stove comprises a first layer of wall body, a second layer of wall body, a third layer of wall body, a fourth layer of wall body, a fifth layer of wall body, a sixth layer of wall body and a seventh layer of wall body, which are sequentially sleeved and fixedly connected with one another; a first barrel body is arranged in the middle of the first layer of wall body; a plurality of spiral heat-transferring air passages are arranged at the periphery of the first barrel body; the first barrel body is fixedly connected with the inner wall of the second layer of wall body through the plurality of heat-transferring air passages in a sealed way; a second barrel body is fixedly communicated with a fourth barrel body; the fourth barrel body is fixedly connected with the top part of the third layer of wall body; a third barrel body is fixedly communicated with the fifth barrel body; a first opening is formed at the top part of the second layer of wall body; the fourth barrel body is arranged in the fourth barrel body; the second layer of wall body is arranged between the first layer of wall body and the third layer of wall body; and the second layer of wall body is fixedly connected with the first layer of wall body through the plurality of heat-transferring air passages. The hot-blast stove has the advantages of relatively high heat exchanging temperature, relatively high heat utilizing rate, small volume, stable hot-blast temperature, no requirement for a switching mechanism, relatively long service life, relatively lower maintenance cost and low purchasing cost.
Description
Technical field
The utility model relates to a kind of hot-blast stove, especially a kind of three backhaul environmental protection and energy saving hot-blast stoves.
Background technology
At present, begin extensive use in late 1970s in China as the hot-blast stove of thermal power machinery, it has become the regeneration product of electric heat source and traditional steam power thermal source in many industries.
By long production practices, it has been recognized that to have only the hot blast of utilization as medium with carrier could improve heat utilization efficiency and the thermal technology makes effect biglyyer.Traditional electrical thermal source and steam thermal power often dispose many circulating fans in course of conveying, make it the final hot blast operation of drying or heat that still forms indirectly.The obvious existence of this process wastes energy in a large number and causes many shortcomings such as auxiliary device is too much, complex technical process.And bigger problem is, this thermal source is then felt simply helpless for the sort of requirement that needs higher temperature drying or baking operation.Through concentrating on studies for many years, develop the JRL series helix finned tube heat exchange indirect type hot-blast stove and the high direct-type hot-blast stove that purifies of ZRL series that welcome by users at home and abroad at these practical problems finally.
1, the high hot-blast stove that purifies of direct-type: be exactly to adopt fuel directly to burn, form hot blast through high purified treatment, and the dry or baking with the material Direct Contact Heating.The consumption of this kind method fuel is approximately than reducing about half with steam-type or other indirect heaters.Therefore, under the situation that does not influence the oven dry product quality, can use the high hot blast that purifies of direct-type fully.Fuel can be divided into: 1. solid fuel, and as coal, coke.2. liquid fuel is as 3. gaseous fuel of diesel oil, heavy oil, as coal gas, natural gas, liquid gas.
The high-temperature combustion gas that fuel obtains after combustion reaction further contacts with outside air, directly enters hothouse or bakery after being mixed into a certain temperature, contact with the material that is dried, and heating, transpiring moisture, thus obtain dry products.In order to utilize the combustion reaction heat of these fuel, must set up a cover fuel burner.As: coal-fired combusting device, oil burner, coal gas burner etc.
2, indirect type hot-blast stove: it is contaminated to be applicable to that mainly the material that is dried does not allow, or is applied to the lower heat sensitive material drying of temperature.As: milk powder, pharmacy, synthetic resin, fine chemistry industry etc.This kind heater promptly is that steam, conduction oil, flue gas etc. are done carrier, and the heat exchanger by various ways adds hot-air.The essential problem of indirect type hot-blast stove is exactly heat exchange.Heat exchange area is big more, and thermal conversion rate is high more, and the energy-saving effect of hot-blast stove is good more, and the life-span of body of heater and heat exchanger is long more.Otherwise the size of heat exchange area also can be discerned on flue-gas temperature.The cigarette temperature is low more, and thermal conversion rate is high more, and heat exchange area is just big more.
Operation principle can be divided into two kinds of heat accumulating type and heat exchange types: heat accumulating type: press the heat storage bulb separation formula hot-blast stove (being called for short the ball stove) of hot-blast stove inside and the hot-blast stove of employing checker brick, can be divided into top ignition by combustion system, and internal combustion type, external-burnings etc. are several.How improving wind-warm syndrome, is the direction that the insider studies for a long period of time.Way commonly used is the combustion gas of multifuel combustion high heating value, or increases the heat exchange area of stove fillings, or changes material, the density of checker brick, or changes the shape (as heat-storing sphere) of heat storage, and by various methodologies with coal gas and combustion air preheating.Shortcoming: volume is big, and the battlefield area is big, the hot blast temperature instability, and switching mechanism is many, easily goes wrong, and the heat storage life-span is short, the maintenance cost height, acquisition cost is high.
Heat exchange type: main being to use uses high temperature resistant heat exchanger to be core component, and these parts can not use.The metal material heat exchanger can only use the refractory ceramics heat exchanger, and combustion gas gas is fully burning in the combustion chamber, and the hot-air after the burning through heat exchanger, is given fresh cold air to heat, and the fresh air temperature is reached more than 1000 degree.Shortcoming: the heat exchange temperature is less than the heat accumulating type height, occurs laterly, is not commonly used.
The utility model content
The purpose of this utility model provides a kind of simple in structure, convenient and practical, three backhaul environmental protection and energy saving hot-blast stoves that cost is lower, and is not only durable in use, safe and reliable, and install easily, the scope of application is wider.
For solving the problems of the technologies described above, the technical solution of the utility model is:
This three backhaul environmental protection and energy saving hot-blast stoves comprise: feeding mouth, and hot-blast stove comprises: the 1st layer of wall body, the 2nd layer of wall body, the 3rd layer of wall body, the 4th layer of wall body, the 5th layer of wall body, the 6th layer of wall body, the 7th layer of wall body, preceding 7 are inserted in connection fastened to each other successively; The 1st layer of wall body is the cup shape; The middle part of the 1st layer of wall body is provided with the 1st cylindrical shell, and the periphery of the 1st cylindrical shell is provided with the spiral heat transfer of multiple tracks air channel, and the 1st cylindrical shell is fixedlyed connected with the inner wall sealing of the 2nd layer of wall body by the heat transfer air channel; Fixedly connected with the 2nd cylindrical shell, the 3rd cylindrical shell respectively in the top of the 1st cylindrical shell, bottom; The 2nd cylindrical shell fixedly is communicated with the 4th cylindrical shell, and the 4th cylindrical shell is fixedlyed connected with the top of the 3rd layer of wall body, and the 3rd cylindrical shell fixedly is communicated with the 5th cylindrical shell; The top of the 2nd layer of wall body is provided with the 1st opening, and the 4th cylindrical shell is located in the 1st opening; The 2nd layer of wall body be located at the 1st layer of wall body and and the 3rd layer of wall body between, the 2nd layer of wall body fixedlyed connected with the 1st layer of wall body by multiple tracks heat transfer air channel, the 2nd layer of wall body fixedlyed connected with the inwall of the 3rd layer of wall body by multiple tracks heat transfer air channel; Fixedly connected with the lower end of the 5th layer of wall body in the lower end of the 3rd layer of wall body, fixedly be communicated with between the 4th layer of wall body and the 3rd layer of wall body and constitute the 1st heat radiation flue, the 1st heat radiation flue fixedly is communicated with the multiple tracks vertical gas pass that is made of the polylith fin through the 1st outlet, and vertical gas pass seals to be located between the 4th layer of wall body and the 5th layer of wall body; The 4th layer of wall body is fixedly connected with the top sealing of the 3rd layer of wall body, and the upper end of the 5th layer of wall body is provided with the 2nd opening, and the periphery of the 5th layer of wall body is provided with a plurality of flue tubes, and the lower end of flue tube fixedly is communicated with furnace foundation; The 5th layer of wall body fixedlyed connected with the 6th layer of wall body by a plurality of flue tubes; Constitute between the 6th layer of wall body and the furnace foundation and advance cold air duct, the periphery of the 6th layer of wall body is provided with a plurality of vertical air channels, and the upper end is provided with into the 7th layer of wall body of cold wind mouth and fixedlys connected with furnace foundation with the 6th layer of wall body through vertical air channel; Air outlet fixedly is communicated with the 2nd layer of wall body and the 7th layer of wall body, and air outlet is symmetrically set in the both sides of hot-blast stove; Feeding mouth fixedly is communicated with the 1st layer of wall body and the 7th layer of wall body; Fixedly connected with furnace foundation in the lower end of the 1st layer of wall body, the 2nd layer of wall body, the 5th layer of wall body, the 6th layer of wall body.
The shape of cross section of the 1st layer of wall body, the 2nd layer of wall body, the 3rd layer of wall body, the 4th layer of wall body, the 5th layer of wall body, the 6th layer of wall body, the 7th layer of wall body, the 1st cylindrical shell, the 2nd cylindrical shell, the 3rd cylindrical shell, the 4th cylindrical shell, the 5th cylindrical shell is circular or square; The top profile of the 1st layer of wall body, the 2nd layer of wall body, the 3rd layer of wall body, the 4th layer of wall body, the 5th layer of wall body, the 6th layer of wall body, the 7th layer of wall body, the 1st cylindrical shell, the 2nd cylindrical shell, the 3rd cylindrical shell, the 4th cylindrical shell, the 5th cylindrical shell is round table-like, and the under shed diameter of the 3rd cylindrical shell is littler than upper shed diameter.
The two ends of furnace foundation are arranged with sewage draining exit.
The beneficial effects of the utility model:
This utility model is a kind of simple in structure, convenient and practical, three backhaul environmental protection and energy saving hot-blast stoves that cost is lower, not only durable in use, safe and reliable, install easily and the scope of application wider.The heat exchange temperature of this product is higher, and heat utilization efficiency is higher, and volume is little, and hot blast temperature is stable, no switching mechanism, and the life-span is longer, and maintenance cost is lower, and acquisition cost is low; This hot-blast stove should be the new product of this area according to the knowledge of the applicant.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Fig. 1 is a combination cross-sectional view of the present utility model.
Fig. 2 is the structural representation of windward route and leeward route.
Fig. 3 is the structural representation of the 1st layer of wall body.
Fig. 4 is the structural representation of the 2nd layer of wall body.
Fig. 5 is the structural representation of the 3rd layer of wall body.
Fig. 6 is the structural representation of the 4th layer of wall body.
Fig. 7 is the structural representation of the 5th layer of wall body.
Fig. 8 is the structural representation of the 6th layer of wall body.
Fig. 9 is the structural representation of the 7th layer of wall body.
The structural representation of the 1st layer of wall body that Figure 10 is and air outlet combination.
The specific embodiment
According to Fig. 1-shown in Figure 10, the utility model mainly comprises: the 1st layer of wall body 1, the 2nd layer of wall body 2, the 3rd layer of wall body 3, the 4th layer of wall body 4, the 5th layer of wall body 5, the 6th layer of wall body 6, the 7th layer of wall body 7, the 1st cylindrical shell 8, the 2nd cylindrical shell 9, the 3rd cylindrical shell 10, the 4th cylindrical shell 11, the 5th cylindrical shell 12, air outlet 13, feeding mouth 14, heat transfer air channel 15, the 1st heat radiation flue 16, the 2nd heat radiation flue 17, the 2nd outlet 18, advance cold wind mouth 19, advance cold air duct 20, the 1st opening 21, flue tube 22, vertical gas pass 23, vertical air channel 24, windward route 25, leeward route 26, furnace foundation 27, sewage draining exit 28, the 2nd opening 29, motor 30.
Hot-blast stove comprises: the 1st layer of wall body 1, the 2nd layer of wall body 2, the 3rd layer of wall body 3, the 4th layer of wall body 4, the 5th layer of wall body 5, the 6th layer of wall body 6, the 7th layer of wall body 7, and preceding 7 are inserted in connection fastened to each other successively; The 1st layer of wall body 1 is the cup shape; The periphery that the middle part of the 1st layer of wall body 1 is provided with the 1st cylindrical shell 8, the 1 cylindrical shells 8 is provided with the spiral heat transfer of multiple tracks air channel 15, the 1 cylindrical shells 8 and fixedlys connected with the inner wall sealing of the 2nd layer of wall body 2 by heat transfer air channel 15; Fixedly connected with the 2nd cylindrical shell the 9, the 3rd cylindrical shell 10 respectively in the top of the 1st cylindrical shell 8, bottom; The 2nd cylindrical shell 9 fixedly is communicated with the 4th cylindrical shell 11, and the 4th cylindrical shell 11 is fixedlyed connected with the top of the 3rd layer of wall body 3, and the 3rd cylindrical shell 10 fixedly is communicated with the 5th cylindrical shell 12; The top of the 2nd layer of wall body 2 is provided with the 1st opening 21, the 4 cylindrical shells 11 and is located in the 1st opening 21; The 2nd layer of wall body 2 be located at the 1st layer of wall body 1 and and the 3rd layer of wall body 3 between, the 2nd layer of wall body 2 fixedlyed connected with the 1st layer of wall body 1 by multiple tracks heat transfer air channel 15, the 2nd layer of wall body 2 fixedlyed connected with the inwall of the 3rd layer of wall body 3 by multiple tracks heat transfer air channel 15; Fixedly connected with the lower end of the 5th layer of wall body 5 in the lower end of the 3rd layer of wall body 3, fixedly be communicated with between the 4th layer of wall body 4 and the 3rd layer of wall body 3 and constitute the 1st heat radiation flue 16, the 1st heat radiation flue 16 fixedly is communicated with the multiple tracks vertical gas pass 23 that is made of the polylith fin through the 2nd outlet 18, and vertical gas pass 23 seals to be located between the 4th layer of wall body 4 and the 5th layer of wall body 5; The 4th layer of wall body 4 is fixedly connected with the top sealing of the 3rd layer of wall body 3, and the periphery that the upper end of the 5th layer of wall body 5 is provided with 29, the 5 layers of wall body 5 of the 2nd opening is provided with a plurality of flue tubes 22, and the lower end of flue tube 22 fixedly is communicated with furnace foundation 27; The 5th layer of wall body 5 fixedlyed connected with the 6th layer of wall body 6 by a plurality of flue tubes 22; Constitute the periphery of advancing 20, the 6 layers of wall body 6 of cold air duct between the 6th layer of wall body 6 and the furnace foundation 27 and be provided with a plurality of vertical air channels 24, the upper end is provided with into the 7th layer of wall body 7 of cold wind mouth 19 and fixedlys connected with furnace foundation 27 with the 6th layer of wall body 6 through vertical air channel 24; Air outlet 13 fixedly is communicated with the 2nd layer of wall body 2 and the 7th layer of wall body 7, and air outlet 13 is symmetrically set in the both sides of hot-blast stove; Feeding mouth 14 fixedly is communicated with the 1st layer of wall body 1 and the 7th layer of wall body 7; Fixedly connected with furnace foundation 27 in the lower end of the 1st layer of wall body 1, the 2nd layer of wall body 2, the 5th layer of wall body 5, the 6th layer of wall body 6.
The shape of cross section of the 1st layer of wall body 1, the 2nd layer of wall body 2, the 3rd layer of wall body 3, the 4th layer of wall body 4, the 5th layer of wall body 5, the 6th layer of wall body 6, the 7th layer of wall body the 7, the 1st cylindrical shell the 8, the 2nd cylindrical shell the 9, the 3rd cylindrical shell the 10, the 4th cylindrical shell the 11, the 5th cylindrical shell 12 is circular or square; The top profile of the 1st layer of wall body 1, the 2nd layer of wall body 2, the 3rd layer of wall body 3, the 4th layer of wall body 4, the 5th layer of wall body 5, the 6th layer of wall body 6, the 7th layer of wall body the 7, the 1st cylindrical shell the 8, the 2nd cylindrical shell the 9, the 3rd cylindrical shell the 10, the 4th cylindrical shell the 11, the 5th cylindrical shell 12 is round table-like, and the under shed diameter of the 3rd cylindrical shell 10 is littler than upper shed diameter.
The two ends of furnace foundation 27 are arranged with sewage draining exit 28.
Operation principle:
The 1st layer of hot blast that wall body 1 heating back produces, it rises to the 3rd cylindrical shell 10 from the 5th cylindrical shell 12 bottoms, pass to the 2nd cylindrical shell 9 through the 1st cylindrical shell 8, concentrate and rise to the 4th cylindrical shell 11, after it enters the 4th layer of wall body 4, along the top of the 4th layer of wall body 4 to around sink, enter in the 5th layer of wall body 5 through the 2nd outlet 18, hot blast is gone here and there down more towards periphery through the upper opening of the 5th layer of wall body 5, and hot blast enters furnace foundation 27 after importing each root flue tube 22 into.
Cold wind outside the stove enters in the stove from the cold wind mouth 19 that advances of furnace roof portion, along around sink to the bottom, the cold air duct 20 that advances through the bottom enters in the 3rd layer of wall body 3, it rises and enters in the 2nd layer of wall body 2 through multiple tracks heat transfer air channel 15, go here and there the bottom under its continues then, be provided with air outlet 13 by two ends again and discharge out of the furnace.
The air channel all is the spiral heat transfer sheet, is sealed into 0, totally 24 of every layer of heat transfer sheets; Flue all is a vertical fins, is sealed into 0, totally 12 of every layer of fin; The flue square tube is divided 12 five equilibriums, square tube at a distance of being 50mm; At a distance of being 70mm, be 30mm apart between flue between the air channel; Air channel and flue all are to finish through three backhauls running.
Claims (3)
1. backhaul environmental protection and energy saving hot-blast stove, comprise: feeding mouth, it is characterized in that: hot-blast stove comprises: the 1st layer of wall body (1), the 2nd layer of wall body (2), the 3rd layer of wall body (3), the 4th layer of wall body (4), the 5th layer of wall body (5), the 6th layer of wall body (6), the 7th layer of wall body (7), and preceding 7 are inserted in connection fastened to each other successively; The 1st layer of wall body (1) is the cup shape; The middle part of the 1st layer of wall body (1) is provided with the 1st cylindrical shell (8), and the periphery of the 1st cylindrical shell (8) is provided with the spiral heat transfer of multiple tracks air channel (15), and the 1st cylindrical shell (8) is fixedlyed connected with the inner wall sealing of the 2nd layer of wall body (2) by heat transfer air channel (15); Fixedly connected with the 2nd cylindrical shell (9), the 3rd cylindrical shell (10) respectively in the top of the 1st cylindrical shell (8), bottom; The 2nd cylindrical shell (9) fixedly is communicated with the 4th cylindrical shell (11), and the 4th cylindrical shell (11) is fixedlyed connected with the top of the 3rd layer of wall body (3), and the 3rd cylindrical shell (10) fixedly is communicated with the 5th cylindrical shell (12); The top of the 2nd layer of wall body (2) is provided with the 1st opening (21), and the 4th cylindrical shell (11) is located in the 1st opening (21); The 2nd layer of wall body (2) be located at the 1st layer of wall body (1) and and the 3rd layer of wall body (3) between, the 2nd layer of wall body (2) fixedlyed connected with the 1st layer of wall body (1) by multiple tracks heat transfer air channel (15), and the 2nd layer of wall body (2) fixedlyed connected with the inwall of the 3rd layer of wall body (3) by multiple tracks heat transfer air channel (15); Fixedly connected with the lower end of the 5th layer of wall body (5) in the lower end of the 3rd layer of wall body (3), fixedly be communicated with between the 4th layer of wall body (4) and the 3rd layer of wall body (3) and constitute the 1st heat radiation flue (16), the 1st heat radiation flue (16) fixedly is communicated with the multiple tracks vertical gas pass (23) that is made of the polylith fin through the 2nd outlet (18), and vertical gas pass (23) sealing is located between the 4th layer of wall body (4) and the 5th layer of wall body (5); The 4th layer of wall body (4) is fixedly connected with the top sealing of the 3rd layer of wall body (3), the upper end of the 5th layer of wall body (5) is provided with the 2nd opening (29), the periphery of the 5th layer of wall body (5) is provided with a plurality of flue tubes (22), and the lower end of flue tube (22) fixedly is communicated with furnace foundation (27); The 5th layer of wall body (5) fixedlyed connected with the 6th layer of wall body (6) by a plurality of flue tubes (22); Constitute between the 6th layer of wall body (6) and the furnace foundation (27) and advance cold air duct (20), the periphery of the 6th layer of wall body (6) is provided with a plurality of vertical air channels (24), and the 7th layer of wall body (7) that the upper end is provided with cold wind mouth (19) into fixedlyed connected with furnace foundation (27) with the 6th layer of wall body (6) through vertical air channel (24); Air outlet (13) fixedly is communicated with the 2nd layer of wall body (2) and the 7th layer of wall body (7), and air outlet (13) is symmetrically set in the both sides of hot-blast stove; Feeding mouth (14) fixedly is communicated with the 1st layer of wall body (1) and the 7th layer of wall body (7); Fixedly connected with furnace foundation (27) in the lower end of the 1st layer of wall body (1), the 2nd layer of wall body (2), the 5th layer of wall body (5), the 6th layer of wall body (6).
2. three backhaul environmental protection and energy saving hot-blast stoves according to claim 1 is characterized in that: the shape of cross section of described the 1st layer of wall body (1), the 2nd layer of wall body (2), the 3rd layer of wall body (3), the 4th layer of wall body (4), the 5th layer of wall body (5), the 6th layer of wall body (6), the 7th layer of wall body (7), the 1st cylindrical shell (8), the 2nd cylindrical shell (9), the 3rd cylindrical shell (10), the 4th cylindrical shell (11), the 5th cylindrical shell (12) is for circular or square; The top profile of the 1st layer of wall body (1), the 2nd layer of wall body (2), the 3rd layer of wall body (3), the 4th layer of wall body (4), the 5th layer of wall body (5), the 6th layer of wall body (6), the 7th layer of wall body (7), the 1st cylindrical shell (8), the 2nd cylindrical shell (9), the 3rd cylindrical shell (10), the 4th cylindrical shell (11), the 5th cylindrical shell (12) is round table-like, and the under shed diameter of the 3rd cylindrical shell (10) is littler than upper shed diameter.
3. three backhaul environmental protection and energy saving hot-blast stoves according to claim 1, it is characterized in that: the two ends of described furnace foundation (27) are arranged with sewage draining exit (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200916306U CN202002308U (en) | 2011-03-31 | 2011-03-31 | Three-return-stroke environment-friendly and energy-saving hot-blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200916306U CN202002308U (en) | 2011-03-31 | 2011-03-31 | Three-return-stroke environment-friendly and energy-saving hot-blast stove |
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| Publication Number | Publication Date |
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| CN202002308U true CN202002308U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200916306U Expired - Lifetime CN202002308U (en) | 2011-03-31 | 2011-03-31 | Three-return-stroke environment-friendly and energy-saving hot-blast stove |
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| CN (1) | CN202002308U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121752A (en) * | 2011-03-31 | 2011-07-13 | 卢洲德 | Three-return-stroke environment-friendly energy-saving hot blast heater |
| CN106196592A (en) * | 2016-05-18 | 2016-12-07 | 横县华能生物质燃料有限公司 | A kind of biomass thermal furnace system |
-
2011
- 2011-03-31 CN CN2011200916306U patent/CN202002308U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121752A (en) * | 2011-03-31 | 2011-07-13 | 卢洲德 | Three-return-stroke environment-friendly energy-saving hot blast heater |
| CN106196592A (en) * | 2016-05-18 | 2016-12-07 | 横县华能生物质燃料有限公司 | A kind of biomass thermal furnace system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111005 Effective date of abandoning: 20130529 |
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| RGAV | Abandon patent right to avoid regrant |