CN113685804A - Anti-coking and firepower-assisted structure of direct-fired straw biomass boiler - Google Patents
Anti-coking and firepower-assisted structure of direct-fired straw biomass boiler Download PDFInfo
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- CN113685804A CN113685804A CN202110999707.8A CN202110999707A CN113685804A CN 113685804 A CN113685804 A CN 113685804A CN 202110999707 A CN202110999707 A CN 202110999707A CN 113685804 A CN113685804 A CN 113685804A
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- coking
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- swinging shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B30/00—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses an anti-coking and firepower-boosting structure of a direct-fired straw biomass boiler, which comprises a boiler body, wherein a material combustion chamber, an ash residue collection chamber and a heat utilization chamber are arranged in the boiler body; the ash collecting chamber is positioned at the bottom of the inner side of the boiler body, a material combustion chamber is arranged on the ash collecting chamber, reciprocating grates are arranged in the material combustion chamber and the ash collecting chamber, and the reciprocating grates can convey materials to the material combustion chamber for combustion; the heat utilization chamber is positioned above the material combustion chamber and can fully collect the heat of the flue gas; an anti-coking structure is arranged in the reciprocating grate. The invention has the advantage of preventing the material from burning and coking.
Description
Technical Field
The invention relates to the technical field of biomass boiler equipment, in particular to an anti-coking and firepower-assisted structure for a direct-fired straw biomass boiler.
Background
With the decreasing reserves of fossil energy such as coal, oil, natural gas, etc., the development of renewable energy has become a global focus of attention. The biomass energy has the characteristics of being renewable, low in pollution, wide in distribution, rich in total amount and the like, and can partially replace fossil energy to be supplied to human beings for use. The development and utilization of biomass energy are more and more paid more and more attention by people. The biomass boiler mainly uses biomass energy as fuel, and concretely, the fuel can be straw, sawdust, bagasse, rice chaff and the like. Compared with traditional fuels such as coal, petroleum and natural gas, the biomass fuel has the problems of insufficient combustion, low boiler thermal efficiency, environmental pollution and the like due to coking during combustion.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a direct-fired straw biomass boiler anti-coking and firepower-boosting structure which can fully combust straw biomass, prevent the straw biomass from coking during combustion in a combustion chamber and ensure that the firepower for biomass material combustion is more vigorous.
The technical scheme of the invention is as follows: a direct-fired straw biomass boiler anti-coking and firepower energy-boosting structure comprises a boiler body, wherein a material combustion chamber, an ash residue collection chamber and a heat utilization chamber are arranged in the boiler body; the ash collecting chamber is positioned at the bottom of the inner side of the boiler body, a material combustion chamber is arranged on the ash collecting chamber, reciprocating grates are arranged in the material combustion chamber and the ash collecting chamber, and the reciprocating grates can convey materials to the material combustion chamber for combustion; the heat utilization chamber is positioned above the material combustion chamber and can fully collect the heat of the flue gas; an anti-coking structure is arranged in the reciprocating grate and can loosen the material burnt on the anti-coking structure to prevent coking.
The further technical scheme of the invention is as follows: the anti-coking structure comprises a stirring disc, a swinging shaft and a driving device, wherein two ends of the swinging shaft are movably connected to the ash residue collecting chamber, the stirring disc is arranged on the swinging shaft and is positioned between longitudinal gaps of the reciprocating grate, one end of the swinging shaft is exposed out of the ash residue collecting chamber and is connected with the driving device, and when the driving device drives the swinging shaft to swing, the swinging shaft can drive the stirring disc to swing around the swinging shaft.
The further technical scheme of the invention is as follows: the driving device comprises a driving motor, an eccentric wheel, a connecting rod and a driving rod; the driving motor is connected with the eccentric wheel, two ends of the connecting rod are respectively hinged with the eccentric wheel and the driving rod, and the driving rod is connected with the swinging shaft and can drive the swinging shaft to swing.
The further technical scheme of the invention is as follows: the driving rod is a rack, the end of the oscillating shaft, which is exposed out of the ash collecting chamber, is connected with a driving gear, the driving gear is meshed with the driving rod, and the non-rack surface of the driving rod is movably connected with a pressing wheel movably connected to the outside of the ash collecting chamber.
The further technical scheme of the invention is as follows: the opposite surfaces of the driving rod and the driving gear are racks, and the pressing wheel is a gear and meshed with the racks on the corresponding surfaces of the driving rod.
The further technical scheme of the invention is as follows: the stirring disc is semicircular and is provided with a mounting hole, the stirring disc is fixed on the oscillating shaft through the mounting hole, and the straight edge of the stirring disc is flush with the upper surface of the reciprocating grate.
The further technical scheme of the invention is as follows: the distance between the tooth top of each stirring tooth and the center of the mounting hole is different.
The further technical scheme of the invention is as follows: the number of teeth of the stirring teeth is symmetrically arranged on two sides of the stirring disc body, and the top end of each tooth of the stirring teeth inclines towards a straight line edge.
The further technical scheme of the invention is as follows: the stirring disc body is provided with a plurality of stirring teeth, and tooth tops of the stirring teeth are higher than the stirring disc body.
Compared with the prior art, the invention has the following characteristics:
1. when biomass materials are combusted in the material combustion chamber, the biomass materials are easy to coke in the combustion process due to the fact that the biomass materials in the combustion process are not stirred, and therefore the middle of the piled materials is not easy to combust and the combustion is not sufficient. Because the anti-coking structure is arranged, the burning material can be turned over in the material burning process, so that the material can be fully burnt, and meanwhile, because the material is turned over, enough oxygen can be provided for the middle part of the burning material, so that the effect of vigorous fire is achieved.
2. The driving device of the anti-coking structure is provided with the eccentric wheel gap structure, and the driving motor can drive the driving rod to horizontally reciprocate through the eccentric wheel, so that the stirring disc intermittently reciprocates around the swinging shaft, the stirring teeth on the stirring disc can more easily loosen materials falling on the stirring disc, and the materials are prevented from coking during combustion.
3. Because the stirring disk is of a semicircular structure, the stirring teeth inclined towards the straight line side are symmetrically arranged on the stirring disk, and the distance between the tooth top of each stirring tooth and the swing shaft is different, the stirring disk is more beneficial to stirring materials, and the materials are fully combusted.
The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a view from the direction B of FIG. 2;
FIG. 4 is a schematic view of the construction of the stirring plate;
FIG. 5 is a schematic view showing the state of use of the stirring plate.
Detailed Description
Example 1
As shown in fig. 1-4, a direct-fired straw biomass boiler comprises a boiler body, wherein a material combustion chamber 11, an ash collecting chamber 12 and a heat utilization chamber 13 are arranged in the boiler body;
the ash collecting chamber 12 is positioned at the bottom of the inner side of the boiler body, a material combustion chamber 11 is arranged on the ash collecting chamber 12, the material combustion chamber 11 and the ash collecting chamber 12 are provided with a reciprocating grate 2, and the reciprocating grate 2 can convey materials into the material combustion chamber 11 for combustion; the ash and slag after the combustion of the material in the material combustion chamber 11 falls into the ash and slag collection chamber 12 and is discharged out of the boiler through the ash discharge mechanism, of course, an air inlet 121 is formed in the ash and slag collection chamber 12, and oxygen is supplied to the boiler through the air inlet 121, so that the material in the material combustion chamber 11 can be sufficiently combusted.
The material combustion chamber 11 is provided with a feeding hole 111, the feeding hole 111 is positioned above one end of the reciprocating grate 2, so that the material enters the reciprocating grate 2 in the boiler through the feeding hole 111, the material is conveyed to the material combustion chamber 11 through the reciprocating grate 2 to be combusted, and in the transportation process, because the temperature in the material combustion chamber 11 and the oxygen of the air inlet 121 are blown, the moisture of the material can be gradually evaporated, and meanwhile, the temperature of the material can be gradually increased, so that the subsequent sufficient combustion is facilitated.
The heat utilization chamber 13 is positioned above the material combustion chamber 11, namely the whole boiler body is divided into three layers, namely the heat utilization chamber 13, the material combustion chamber 11 and the ash residue collection chamber 12 from top to bottom.
The heat utilization chamber 13 can fully collect the heat of the flue gas generated by the combustion of the materials in the material combustion chamber 11, the top of the heat utilization chamber is provided with a flue gas pipeline 1321 for discharging the flue gas, the bottom of the heat utilization chamber is provided with a flue gas inlet pipeline 1322, and the flue gas in the material combustion chamber 11 is introduced into the heat utilization chamber 13 by the flue gas inlet pipeline 1322.
In order to prevent the direct-fired straw biomass materials from coking when the materials are combusted in the material combustion chamber 11, the boiler is provided with an anti-coking and firepower energy-boosting structure, namely, the anti-coking structure is arranged in the gap of the reciprocating grate 2 at the top of the ash residue collection chamber 12.
The anti-coking structure comprises a stirring disc 41, a swinging shaft 42 and a driving device, wherein two ends of the swinging shaft 42 are movably connected to the ash collecting chamber 12 through bearings or bearing bushes, namely the swinging shaft 42 can rotate relative to the ash collecting chamber 12. The oscillating shaft 42 is provided with the stirring disc 41, and the stirring disc 41 is positioned between the longitudinal gaps of the reciprocating grate 2, as shown in figure 2, so that the gap of the installation position of the existing reciprocating grate 2 is utilized to install the reciprocating grate, and the production cost is saved. Preferably, the agitator disk 41 is semi-circular, and when the anti-coking structure is not in operation, the straight edge of the agitator disk 41 is flush with the upper surface of the reciprocating grate 2, as shown in fig. 1, the straight edge of the agitator disk 41 cannot be higher than the upper surface of the reciprocating grate 2, otherwise the resistance of the reciprocating grate 2 to material transportation is increased. This facilitates the turning of the material on the reciprocating grate 2 as the agitator plate 41 oscillates.
The stirring plate 41 has a mounting hole 412 in the middle thereof, and the mounting hole 412 allows the stirring plate 41 to be mounted on the swing shaft 42 and to swing with the swing shaft 42.
The stirring plate 41 is provided with a plurality of stirring teeth 411, the tooth tops of the stirring teeth 411 are higher than the stirring plate 41, preferably, the stirring teeth 411 are symmetrically arranged on two sides of the stirring plate 41, in this embodiment, 6 stirring teeth 411 are provided, as shown in fig. 4, three stirring teeth 411 are provided on the left and right, and other numbers are certainly possible. In order to facilitate the turning of the materials, the tip ends of the stirring teeth 411 are inclined toward the straight side of the stirring plate 41, i.e., both are inclined toward the middle, but it is preferable that the tip ends thereof do not exceed the straight side of the stirring plate 41. When the stirring disc 41 swings left and right, as shown in fig. 5, the left and right hooking of the materials is facilitated, the material stirring is more efficient, the burning materials are more fully contacted with air, the burning is facilitated, and the effect of boosting the strong fire is achieved.
Preferably, the distance between the tooth top of each of the agitating teeth 411 and the center of the mounting hole 412 is different, so that when the agitating plate 41 intermittently swings left and right, the movement locus of the tooth top of all the agitating teeth 411 is prevented from being a circle with the same radius, and because the movement locus of the tooth top of each of the agitating teeth 411 is a circle with the same radius, the material falling thereon can hardly be turned over.
In order to drive the agitation plate 41 to swing left and right, i.e., to swing left and right intermittently, one end of the swing shaft 42 is exposed outside the ash collection chamber 12 and connected to a driving means, preferably, the driving means includes a driving motor 441, an eccentric 442, a connecting rod 443 and a driving rod 444; the driving motor 441 is connected to the eccentric wheel 442, the connecting rod 443 is hinged to the eccentric wheel 442 and the driving rod 444 at two ends, and the driving rod 444 is connected to the swing shaft 42 and drives the swing shaft 42 to rotate.
Preferably, the driving rod 444 is a rack, the end of the swinging shaft 42 exposed out of the ash collecting chamber 12 is connected with a driving gear 445, the driving gear 445 is meshed with the driving rod 444, and the non-rack surface of the driving rod 444 is movably connected with a pressing wheel 446 movably connected outside the ash collecting chamber 12. When the driving motor 441 rotates, the eccentric wheel 442 rotates to drive the connecting rod 443 to move the driving rod 444 left and right in the horizontal direction (as viewed from the direction of fig. 3), and the rack surface of the driving rod 444 is engaged with the driving gear 445 to drive the oscillating shaft 42 to intermittently oscillate left and right, so that the stirring plate 41 intermittently oscillates left and right, and the falling material is stirred, thereby preventing coking during material combustion and achieving the purpose of vigorous fire. The state of the oscillating stirring plate 41 is shown in fig. 5.
Preferably, the opposite surface of the driving rod 444 and the driving gear 445 is also a rack, and the pressing wheel 446 is a gear and is meshed with the rack on the corresponding surface of the driving rod 444. That is, the driving rod 444 is a double-sided rack, one side of the rack is meshed with the driving gear 445 to drive the stirring disc 41 to move intermittently, and the other side of the rack is meshed with the pressing wheel 446 to make the driving rod 444 move more stably.
As shown in fig. 3, the driving rod 444 is engaged with three driving gears 445 and two pressing wheels 446, that is, the driving device drives three swing shafts 42 at the same time. As shown in fig. 2, each oscillating shaft 42 is provided with seven stirring disks 41, and the seven stirring disks 41 on the same oscillating shaft 42 are preferably arranged at equal intervals, although the stirring disks 41 are installed in the longitudinal gaps of the reciprocating grate 2 so as not to interfere with the movement of the reciprocating grate 2. Of course, the number of the swing shafts 42, the stirring plates 41 and the pressing rollers 446 is set according to the size of the boiler.
The above-described embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit and scope of the present invention.
Claims (9)
1. A direct-fired straw biomass boiler anti-coking and firepower boosting structure comprises a boiler body, wherein a material combustion chamber (11), an ash collecting chamber (12) and a heat utilization chamber (13) are arranged in the boiler body;
the ash collecting chamber (12) is positioned at the bottom of the inner side of the boiler body, a material combustion chamber (11) is arranged on the ash collecting chamber (12), the material combustion chamber (11) and the ash collecting chamber (12) are provided with a reciprocating grate (2), and the reciprocating grate (2) can convey materials into the material combustion chamber (11) for combustion;
the heat utilizes room (13) to be located the top of material combustion chamber (11), can fully collect the heat of flue gas, its characterized in that: an anti-coking structure is arranged in the reciprocating grate (2), and the anti-coking structure can loosen materials combusted on the anti-coking structure to prevent coking.
2. The direct-fired straw biomass boiler anti-coking and firepower energy-saving structure as claimed in claim 1, wherein: the anti-coking structure comprises a stirring disc (41), a swinging shaft (42) and a driving device, wherein two ends of the swinging shaft (42) are movably connected to an ash residue collecting chamber (12), the stirring disc (41) is installed on the swinging shaft, the stirring disc (41) is positioned in a longitudinal gap of the reciprocating grate (2), one end of the swinging shaft (42) is exposed out of the ash residue collecting chamber (12) and is connected with the driving device, and when the driving device drives the swinging shaft (42) to swing, the swinging shaft (42) can drive the stirring disc (41) to swing around the swinging shaft (42).
3. The direct-fired straw biomass boiler anti-coking and firepower energy-saving structure as claimed in claim 2, wherein: the driving device comprises a driving motor (441), an eccentric wheel (442), a connecting rod (443) and a driving rod (444); the driving motor (441) is connected with the eccentric wheel (442), two ends of the connecting rod (443) are respectively hinged with the eccentric wheel (442) and the driving rod (444), and the driving rod (444) is connected with the swinging shaft (42) and can drive the swinging shaft (42) to swing.
4. The direct-fired straw biomass boiler anti-coking and firepower energy-saving structure as claimed in claim 3, wherein: the driving rod (444) is a rack, the end, exposed out of the ash collecting chamber (12), of the swinging shaft (42) is connected with a driving gear (445), the driving gear (445) is meshed with the driving rod (444), and the non-rack surface of the driving rod (444) is movably connected with a pressing wheel (446) movably connected to the outside of the ash collecting chamber (12).
5. The direct-fired straw biomass boiler anti-coking and firepower energy-saving structure as claimed in claim 4, wherein: the opposite surface of the driving rod (444) and the driving gear (445) is also a rack, and the pressing wheel (446) is a gear and is meshed with the rack on the corresponding surface of the driving rod (444).
6. The direct-fired straw biomass boiler anti-coking and firepower energy-saving structure as claimed in claim 2, wherein: the stirring disc (41) is semicircular, a mounting hole (412) is formed in the stirring disc, the stirring disc (41) is fixed on the swinging shaft (42) through the mounting hole (412), and the straight edge of the stirring disc is flush with the upper surface of the reciprocating grate (2).
7. The direct-fired straw biomass boiler anti-coking and firepower energy-saving structure as claimed in claim 6, wherein: the stirring disc (41) body is provided with a plurality of stirring teeth (411), and the tooth tops of the stirring teeth (411) are higher than the stirring disc (41) body.
8. The direct-fired straw biomass boiler anti-coking and firepower energy-assisted structure as claimed in claim 7, wherein: the distance between the tooth top of each stirring tooth (411) and the center of the mounting hole (412) is different.
9. The direct-fired straw biomass boiler anti-coking and firepower energy-assisted structure as claimed in claim 7, wherein: the number of teeth of the stirring teeth (411) is symmetrically arranged on two sides of the stirring disc (41) body, and the top end of each tooth of the stirring teeth (411) inclines towards a straight line side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110999707.8A CN113685804A (en) | 2021-08-29 | 2021-08-29 | Anti-coking and firepower-assisted structure of direct-fired straw biomass boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110999707.8A CN113685804A (en) | 2021-08-29 | 2021-08-29 | Anti-coking and firepower-assisted structure of direct-fired straw biomass boiler |
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| Publication Number | Publication Date |
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| CN113685804A true CN113685804A (en) | 2021-11-23 |
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| CN202110999707.8A Pending CN113685804A (en) | 2021-08-29 | 2021-08-29 | Anti-coking and firepower-assisted structure of direct-fired straw biomass boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413243A (en) * | 2022-01-29 | 2022-04-29 | 湖北和瑞能源科技股份有限公司 | Biomass steam combustion boiler with anti-scald protection structure |
-
2021
- 2021-08-29 CN CN202110999707.8A patent/CN113685804A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413243A (en) * | 2022-01-29 | 2022-04-29 | 湖北和瑞能源科技股份有限公司 | Biomass steam combustion boiler with anti-scald protection structure |
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