CN212361992U - Straw bundle burning direct-combustion grain drying hot-blast stove - Google Patents
Straw bundle burning direct-combustion grain drying hot-blast stove Download PDFInfo
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- CN212361992U CN212361992U CN202021124349.3U CN202021124349U CN212361992U CN 212361992 U CN212361992 U CN 212361992U CN 202021124349 U CN202021124349 U CN 202021124349U CN 212361992 U CN212361992 U CN 212361992U
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Abstract
The utility model discloses a straw bundle burns direct combustion grain stoving hot-blast furnace, include: the device comprises a firebrick hearth, a chain grate, a straw drying and bag breaking chamber, an air-cooled material stirring device and a feeding device; a front wall, a rear arch, a separation wall and the like are arranged in the firebrick hearth, and the firebrick hearth is provided with a semi-gasification combustion chamber, a fixed carbon burnout chamber and a strengthened combustion chamber; the chain grate is horizontally arranged at the bottom of the straw drying and bag breaking chamber and the firebrick hearth; the straw drying bag breaking chamber is arranged in front of a feed inlet of the firebrick hearth, and an air-cooled straw bag breaking device capable of supplying oxygen to the intensified combustion chamber is arranged in the straw drying bag breaking chamber; the feeding device is used for conveying the straw bundles to the straw drying and bag breaking chamber. The utility model solves the direct burning problem of straw bundle burning; the straw bundle can be quickly broken; the material can be continuously fed and the slag can be continuously discharged; the firebrick hearth adopts staged combustion, so that the combustion effect is improved, and the concentration of the generated nitrogen oxides is reduced; the air-cooled stirring device can also disperse and burn out unburnt straw fuel in the fixed carbon burnout chamber.
Description
Technical Field
The utility model relates to a straw burning technical field especially relates to a straw bundle burns direct-fired grain stoving hot-blast furnace.
Background
At present, most of grain drying enterprises in China use coal as fuel, smoke dust, sulfur dioxide, oxynitride and the like generated by coal combustion cause smoke type smoke pollution in the atmosphere, but due to the gradual generation of the shortage of fossil energy, the combustion and utilization of biomass straws are widely concerned by people, and biomass energy is the only renewable clean energy on the earth, and is very suitable for a large amount of development and conversion utilization because of the characteristics of large volatile ratio, strong carbon activity, small harm of emission after combustion to the environment and the like, so that the biomass energy is environment-friendly fuel. However, with the development of national economy, the energy structure of vast rural areas in China is also changed greatly, a large amount of straws are abandoned or burned on the spot in the field, and serious resource waste and environmental pollution are caused; the fly ash is seriously combusted in a suspension manner, so that the straw is difficult to transport; the energy consumption of compact forming combustion is high; the straw bundling combustion mode integrates the advantages of the three combustion modes, the bundling mode increases the density of straw biomass and is convenient to transport and store, and meanwhile, compared with a compression forming mode, the bundling mode consumes less energy, so that the bundling combustion mode is the combustion mode with the greatest development prospect in the future.
However, the current straw bundle burns and can not ensure the straw bundle fully burns, the straw bundle leans on the air-blower to give the wind natural combustion in furnace, not only combustion speed is slow, and the straw burning is not thorough, and the thermal efficiency is low, therefore, how to solve the current straw bundle and burn and exist the shortcoming in the technique, provide a straw bundle in furnace, can fully burn, the thermal efficiency is high, energy-concerving and environment-protective straw bundle burns grain stoving hot-blast furnace, be the one problem that technical staff in the field had urgent need to solve at present.
SUMMERY OF THE UTILITY MODEL
Therefore, an object of the utility model is to provide a straw bundle burns direct-fired grain stoving hot-blast furnace to effectively solve the above-mentioned problem that current straw bundle burns the technique and exists, its concrete technical scheme as follows:
the utility model provides a straw bundle burns direct combustion grain stoving hot-blast furnace, includes: the device comprises a firebrick hearth, a chain grate, a straw drying and bag breaking chamber, an air-cooled material stirring device and a feeding device;
the front wall of the firebrick hearth is provided with a feed inlet, the feed inlet is used for conveying the broken straws into the firebrick hearth through the chain grate, the rear end of the firebrick hearth is provided with a rear arch, a separation wall is arranged between the front wall and the rear arch of the firebrick hearth, and the separation wall, the front wall and the firebrick hearth jointly form a semi-gasification combustion chamber; the rear arch top wall, the separation wall and the firebrick hearth form a strengthened combustion chamber together; the lower wall of the rear arch, the partition wall and the firebrick hearth jointly enclose a fixed carbon burnout chamber, a flame jet communicated with the semi-gasification combustion chamber and the intensified combustion chamber is arranged on the partition wall, a flue gas outlet communicated with the intensified combustion chamber and the fixed carbon burnout chamber is arranged at the end part of the rear arch close to the partition wall, a high-temperature flue gas outlet is arranged at the rear upper part of the intensified combustion chamber, and the high-temperature flue gas outlet is communicated with a flue gas inlet of a heat exchanger;
the straw drying and bag breaking chamber is arranged in front of the feed inlet of the firebrick hearth, and an air-cooled straw bag breaking device is arranged in the straw drying and bag breaking chamber; the air-cooled straw bale breaking device comprises a bale breaking roller assembly, the bale breaking roller assembly is fixed on the side wall of the straw drying bale breaking chamber through bearing blocks at two ends and is used for breaking straw bales, one end of the bale breaking roller assembly is connected with a first air blower through an air pipe, and the other end of the bale breaking roller assembly is communicated with the intensified combustion chamber through an air pipe;
the chain grate is horizontally arranged at the straw drying bag breaking chamber and the bottom of the firebrick hearth, and gaps exist between the top surface of the chain grate and the upper end of the feed inlet at the lower part of the front wall of the firebrick hearth as well as the bottom end of the partition wall; a plurality of air chambers are arranged below the chain grate along the conveying direction of the chain grate;
the air-cooled stirring device is arranged at the lower part of the fixed carbon burnout chamber in the firebrick hearth and above the traveling grate stoker, and comprises a stirring roller assembly which is fixed on the side wall of the firebrick hearth through bearing seats at two ends and is used for stirring and scattering unburnt straw fuel to burn out;
the feeding device is arranged at the front end of the straw drying and bag breaking chamber and used for conveying the straw bundles into the straw drying and bag breaking chamber.
Through the technical scheme, the utility model provides a straw bundle burns direct-fired grain stoving hot-blast furnace, it is first, the straw bundle has been solved and has burnt the direct-fired problem, the straw bundle is carried to the dry broken package of straw indoor through loading attachment, receive the radiation of flue gas and dry when broken package of broken package roller assembly in the dry broken package of straw, moisture in the straw has been reduced, the density of straw diminishes after the broken package of straw bundle of straw simultaneously, be favorable to the straw bundle to break the burning in furnace behind the package.
Second, the utility model provides a broken package roller assembly can carry out quick broken package to the straw, and the straw that scatters also can tentatively be burnt absolutely in the broken package room of straw drying to improve follow-up combustion effect. Simultaneously, the one end of broken package roller assembly passes through the tuber pipe and links to each other with first air-blower, and the other end links to each other and sends the hot-blast of broken package roller assembly of cooling to the firebrick furnace's of nai intensive combustion chamber through the tuber pipe in with the tuber pipe, has realized the dual function effect to the cooling protection of broken package roller assembly and to the firebrick furnace's of nai intensive combustion chamber injection oxygen.
Third, because the utility model provides a firebrick furnace has adopted the fractional combustion of half gasification combustion chamber, fixed carbon burn-off room and intensive combustion chamber, has not only improved the combustion effect, and produced nitrogen oxide concentration is low moreover, has reached energy-concerving and environment-protective effect.
Fourthly, the utility model discloses owing to adopted the traveling grate stoker, can realize continuous feeding and slag tap in succession.
Fifth, the utility model discloses still installed in resistant firebrick furnace and to dial scattered burn-out's forced air cooling and dial material device with the straw fuel that fixed carbon burn-out indoor not burnt out.
Sixth, the utility model discloses pass through the heat exchanger heat transfer with the high temperature smog that produces in the resistant firebrick furnace, the clean air of high temperature after the heat transfer supplies grain to dry and uses.
On the basis of the technical scheme, the utility model discloses still can make following improvement:
preferably, the bale breaking roller assembly comprises two bale breaking roller main shaft pipes which are arranged in the straw drying bale breaking chamber side by side; two ends of each bale breaking roller main shaft pipe are rotatably connected with the side walls of two sides in the straw drying bale breaking chamber through bearing seats, and the two bale breaking roller main shaft pipes rotate oppositely; the outer side walls of the rings of the main shaft pipes of the two bag breaking rollers are provided with a plurality of bag breaking thorns; the inner parts of the two main shaft pipes of the bale breaking roller are both air channels; one end of the air channel of the two main shaft pipes of the bale breaking roller is respectively connected with the first blower through an air pipe, and the other end of the air channel is respectively communicated with the intensified combustion chamber through an air pipe.
The main shaft pipes of the two oppositely rotating bale breaking rollers are provided with bale breaking thorns, so that straw bales can be quickly broken, and scattered straws can be initially burnt in the straw drying bale breaking chamber, so that the subsequent burning effect is improved; the two bag breaking roller main shaft pipes are connected with the first air blower through the air channels in the two bag breaking roller main shaft pipes, the bearing seats and other structures can be prevented from being damaged due to the fact that the two bag breaking roller main shaft pipes are in a high-temperature state for a long time, the working capacity of the structures is guaranteed, and the service life of the structures is prolonged.
Meanwhile, the other ends, far away from the first air blower, of the air channels of the two bag breaking roller main shaft pipes are communicated with the intensified combustion chamber through air pipes, and hot air after the bag breaking roller main shaft pipes are cooled can be sent into the intensified combustion chamber through the air pipes so as to inject oxygen into the intensified combustion chamber of the firebrick hearth.
Preferably, two wherein one end of broken package roller main shaft pipe equidirectional all is equipped with broken package roller sprocket, simultaneously, in this end one side install first drive motor on the dry broken package outdoor wall of straw, first drive motor is located two break between the package roller sprocket, be equipped with respectively on first drive motor's the output shaft two with two break package roller sprocket relative in position, break package roller sprocket and rather than corresponding first drive motor sprocket passes through the chain and realizes the transmission.
Preferably, the material stirring roller assembly comprises two material stirring roller main shaft pipes which are arranged in the firebrick hearth side by side; two ends of each material stirring roller main shaft pipe are rotatably connected with the side walls of two sides in the firebrick hearth through bearing seats; the outer side walls of the rings of the main shaft pipes of the two material stirring rollers are provided with a plurality of material stirring thorns; the inner parts of the two main shaft pipes of the material stirring roller are both air channels; the outer side walls of the rings of the two main shaft pipes of the material stirring roller are provided with a plurality of air holes communicated with the air channel; one end of the main shaft pipe of the material stirring roller is connected with a second air blower through an air pipe, the end part of one end of the main shaft pipe of the material stirring roller in the same direction is sealed, and the other ends of the main shaft pipes of the material stirring rollers in the same direction are communicated through the air pipe.
The two rotatable stirring roller main shaft pipes are provided with stirring thorns which can stir and disperse the unburnt fuel to burn out; the two material stirring roller main shaft pipes are connected with the second air blower through the air channels in the material stirring roller main shaft pipes, the bearing seats and other structures can be prevented from being damaged due to the fact that the materials stirring roller main shaft pipes and the bearing seats are in a high-temperature state for a long time, the working capacity of the structures is guaranteed, and the service life of the structures is prolonged.
Meanwhile, one end of one of the main shaft pipes of the material stirring roller is communicated with the second air blower through an air pipe, the other end of the main shaft pipe of the material stirring roller is communicated with the main shaft pipe of the other material stirring roller through the air pipe, the other end of the main shaft pipe of the other material stirring roller is sealed, air holes are formed in the main shaft pipes of the two material stirring rollers, and cooling air entering the main shaft pipe of the material stirring roller supplies oxygen to unburned fuel through the air holes, so that the fuel can be further combusted.
Preferably, the two material shifting roller chain wheels are arranged at one end of the two material shifting roller main shaft pipes in the same direction, meanwhile, a second transmission motor is arranged on the outer wall of the firebrick hearth at one side of the end, the second transmission motor is positioned between the two material shifting roller chain wheels, two second transmission motor chain wheels opposite to the two material shifting roller chain wheels are respectively arranged on the output shaft of the second transmission motor, and the material shifting roller chain wheels and the second transmission motor chain wheels corresponding to the material shifting roller chain wheels realize transmission through chains.
Preferably, the feeding device comprises a feeding device main body, a lifting bracket for supporting the straw bundles is arranged in the feeding device main body, the lifting bracket is driven by a lifting mechanism to move up and down, and bracket guide mechanisms for guiding the lifting bracket to move up and down are further arranged on two side walls in the feeding device main body.
Preferably, a clearance of 1000-1300mm is formed between the upper end of the feed inlet at the lower part of the front wall of the firebrick hearth and the top surface of the traveling grate stoker; and a clearance of 800-1000mm is formed between the bottom end of the isolation wall and the top surface of the chain grate, so that the broken straws enter a firebrick hearth.
Preferably, the air chamber is an isobaric air chamber and is uniformly distributed below the chain grate so as to uniformly convey oxygen required by straw combustion into a firebrick hearth.
Preferably, the rear end of the traveling grate stoker is provided with a recovery processing device for recovering and processing straw combustion waste residues.
Known via foretell technical scheme, compare with prior art, the utility model discloses a straw bundle burns direct-fired grain stoving hot-blast furnace has following beneficial effect:
1. the straws do not need to be processed into particles or briquettes, and can be directly combusted, so that an intermediate processing link is omitted, and the operation cost is greatly reduced.
2. The density of the straw after the straw bundle is broken is small, the combustion temperature can not reach the ash melting point of the straw ash, and the straw is not easy to coke during combustion.
3. The continuous feeding and continuous slag discharging can be realized due to the adoption of the chain grate.
4. The staged combustion of the semi-gasification combustion chamber, the fixed carbon burnout chamber and the reinforced combustion chamber not only improves the combustion effect, but also produces low concentration of nitrogen oxides, thereby achieving the effects of energy conservation and environmental protection.
5. The automatic feeding of straw bundles is realized by adopting the lifting type feeding device.
6. The air-cooled straw bale breaking device and the air-cooled material stirring device both adopt air-cooled cooling structures, so that the bale breaking roller assembly, the material stirring roller assembly, corresponding bearing seats and other structures are prevented from being damaged due to high temperature for a long time, and the working reliability of the structures is ensured.
7. The problem of the straw fully burn out in the firebrick furnace fixed carbon burnout chamber is solved, if the moisture of the straw that breaks burning seriously exceeds standard, then it just can't burn thoroughly in furnace, and under the rotation of two-stage stirring roller main shaft pipe and the circumstances of giving oxygen, can make the straw obtain abundant burning and burn out.
8. The utility model discloses in the broken hot-blast after the package device internal cooling of forced air cooling straw is further sent the enhancement combustion chamber of resistant firebrick furnace through the tuber pipe again to for it pours into oxygen into, make it can obtain more sufficient burning.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic diagram of a main section structure provided by the present invention.
Fig. 2 is a schematic top sectional view of fig. 1.
Wherein, in the figure,
1-firebrick hearth, 2-traveling grate, 3-straw drying and bag breaking chamber, 4-air cooling and material stirring device, 5-feeding device, 6-feeding port, 7-front wall, 8-rear arch, 9-separating wall, 10-semi-gasification combustion chamber, 11-intensified combustion chamber, 12-fixed carbon burnout chamber, 13-fire nozzle, 14-flue gas outlet, 15-high temperature flue gas outlet, 16-air cooling straw bag breaking device, 17-bag breaking roller spindle pipe, 18-bearing seat, 19-bag breaking thorn, 20-air channel, 21-first blower, 22-air pipe, 23-first drive motor, 24-first drive motor sprocket, 25-chain, 26-material stirring spindle pipe, 27-material stirring thorn, 28-air hole, 29-a second blower, 30-a second transmission motor, 31-a kickoff roller chain wheel, 32-a feeding device main body, 33-a lifting bracket, 34-a lifting mechanism and 35-a bracket guide mechanism.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Example (b):
the straw bundle burning direct-combustion grain drying hot blast stove provided by the embodiment of the utility model is described in detail below according to the figures 1-2.
Referring to the attached drawings 1 and 2, the embodiment of the utility model discloses a straw bundle burns grain stoving hot-blast furnace directly, include: the device comprises a firebrick hearth 1, a chain grate 2, a straw drying and bag breaking chamber 3, an air-cooled material stirring device 4 and a feeding device 5;
a front wall 7 of the firebrick hearth 1 is provided with a feed inlet 6, the feed inlet 6 is used for conveying the broken straws into the firebrick hearth 1 through the chain grate 2, the rear end of the firebrick hearth 1 is provided with a rear arch 8, a separation wall 9 is arranged between the front wall 7 and the rear arch 8 of the firebrick hearth 1, and the separation wall 9, the front wall 7 and the firebrick hearth 1 jointly enclose a semi-gasification combustion chamber 10; the top wall of the rear arch 8, the partition wall 9 and the firebrick hearth 1 jointly enclose a reinforced combustion chamber 11; the lower wall of the rear arch 8, the partition wall 9 and the firebrick hearth 1 jointly enclose a fixed carbon burnout chamber 12, a flame spray opening 13 for communicating the semi-gasification combustion chamber 10 and the intensified combustion chamber 11 is arranged on the partition wall 9, a flue gas outlet 14 for communicating the intensified combustion chamber 11 and the fixed carbon burnout chamber 12 is arranged at the end part of the rear arch 8 close to the partition wall 9, a high-temperature flue gas outlet 15 is arranged at the rear upper part of the intensified combustion chamber 11, and the high-temperature flue gas outlet 15 is communicated with a flue gas inlet of the heat exchanger.
The straw drying and bag breaking chamber 3 is arranged in front of the feed inlet 6 of the firebrick hearth 1, and an air-cooled straw bag breaking device 16 is arranged in the straw drying and bag breaking chamber; the air-cooled straw bale breaking device 16 comprises a bale breaking roller assembly, the bale breaking roller assembly is fixed on the side wall of the straw drying bale breaking chamber 3 through bearing seats 18 at two ends and is used for breaking straw bales, one end of the bale breaking roller assembly is connected with a first air blower 21 through an air pipe 22, and the other end of the bale breaking roller assembly is communicated with the intensified combustion chamber 11 through the air pipe 22.
Specifically, the bale breaking roller assembly comprises two bale breaking roller main shaft pipes 17 which are arranged in the straw drying bale breaking chamber 3 side by side; two ends of each bale breaking roller main shaft pipe 17 are rotatably connected with the side walls of two sides in the straw drying bale breaking chamber 3 through bearing seats 18, and the two bale breaking roller main shaft pipes 17 rotate oppositely; the outer side walls of the main shaft pipes 17 of the two bag breaking rollers are provided with a plurality of bag breaking thorns 19; the air channels 20 are arranged inside the main shaft pipes 17 of the two bale breaking rollers; one ends of air ducts 20 of the two bag breaking roller main shaft pipes 17 are respectively connected with a first blower 21 through air pipes 22, and the other ends of the air ducts are respectively communicated with the intensified combustion chamber 11 through the air pipes 22.
The one of them one end in two broken package roller main shaft pipes 17 equidirectional all is equipped with broken package roller sprocket, simultaneously, install first drive motor 23 on the dry broken package room 3 outer wall of straw on this end one side, first drive motor 23 is located between two broken package roller sprockets, be equipped with two first drive motor sprockets 24 relative with two broken package roller sprocket positions on the output shaft of first drive motor 23 respectively, broken package roller sprocket and rather than the first drive motor sprocket 24 that corresponds realize the transmission through chain 25. That is, the rotation of the main shaft pipe 17 of the bale breaking roller is realized by the first transmission motor 23 driving the chain 25 and the chain wheel of the bale breaking roller.
The chain grate 2 is horizontally arranged at the bottom of the straw drying bag breaking chamber 3 and the firebrick hearth 1, and gaps are reserved between the top surface of the chain grate 2 and the upper end of a feeding hole 6 at the lower part of a front wall 7 of the firebrick hearth as well as the bottom end of a separation wall 9; a plurality of air chambers are arranged below the traveling grate 2 along the conveying direction, and the air chambers are isobaric air chambers and are uniformly distributed below the traveling grate 2.
Specifically, a clearance of 1000-1300mm is formed between the upper end of a feeding hole 6 at the lower part of the front wall 7 of the firebrick hearth and the top surface of the traveling grate 2; a clearance of 800-1000mm is arranged between the bottom end of the partition wall 9 and the top surface of the traveling grate 2.
The rear end of the chain grate 2 is provided with a recovery processing device for recovering and processing straw combustion waste residues.
The air-cooled stirring device 4 is arranged at the lower part of the carbon burnout chamber 12 fixed in the firebrick hearth 1 and above the traveling grate 2, the air-cooled stirring device 4 comprises a stirring roller assembly, and the stirring roller assembly is fixed on the side wall of the firebrick hearth 1 through bearing seats 18 at two ends and is used for stirring and scattering unburnt straw fuel.
Specifically, the material stirring roller assembly comprises two material stirring roller main shaft pipes 26 which are arranged in the firebrick hearth 1 side by side; both ends of each material shifting roller main shaft pipe 26 are rotatably connected with the side walls at both sides in the firebrick hearth 1 through bearing seats 18; the outer side wall of the ring of the main shaft pipe 26 of the two material stirring rollers is provided with a plurality of material stirring thorns 27; the air channels 20 are arranged inside the main shaft pipes 26 of the two material poking rollers; the outer side walls of the main shaft pipes 26 of the two material stirring rollers are provided with a plurality of air holes 28 communicated with the air duct 20; one end of one of the main shaft pipes 26 of the material shifting roller is connected with a second air blower 29 through an air pipe 22, one end part of the other main shaft pipe 26 of the material shifting roller in the same direction is sealed, and the other ends of the two main shaft pipes 26 of the material shifting roller in the same direction are communicated through the air pipe 22.
One end of each material shifting roller main shaft pipe 26 in the same direction is provided with a material shifting roller chain wheel 31, meanwhile, the outer wall of the firebrick hearth 1 on one side of the end is provided with a second transmission motor 30, the second transmission motor 30 is positioned between the two material shifting roller chain wheels 31, the output shaft of the second transmission motor 30 is respectively provided with two second transmission motor chain wheels opposite to the two material shifting roller chain wheels 31, and the material shifting roller chain wheels 31 and the second transmission motor chain wheels corresponding to the material shifting roller chain wheels are driven by chains 25. That is, the rotation of the main shaft tube 26 of the material shifting roller is realized by the second transmission motor 30 driving the chain 25 and the material shifting roller chain wheel 31.
The feeding device 5 is arranged at the front end of the straw drying and bag breaking chamber 3 and used for conveying the straw bundles into the straw drying and bag breaking chamber 3.
Specifically, loading attachment 5 includes loading attachment main part 32, and the inside promotion bracket 33 that is used for bearing the straw bundle that is equipped with of loading attachment main part 32 promotes the bracket 33 and is driven by hoist mechanism 34 and carries out the up-and-down motion, still is equipped with the bracket guiding mechanism 35 that is used for guiding promotion bracket 33 to carry out the up-and-down motion on the both sides wall in loading attachment main part 32.
The utility model discloses a concrete theory of operation does:
the straw bundles are automatically fed into the straw drying and bag breaking chamber 3 in front of the feed inlet 6 of the firebrick hearth by the feeding device 5, the two bag breaking roller main shaft pipes 17 drive the bag breaking thorns 19 thereon to break the bags of the straw bundles through opposite rotation, and the straw bundles are dried by being irradiated by smoke while being broken; meanwhile, the first blower 21 is started to bring cooling air into the main shaft pipes 17 of the bale breaking rollers, so that continuous cooling protection of the two main shaft pipes 17 of the bale breaking rollers and other corresponding structures is realized, and the cooled hot air is sent into the intensified combustion chamber 11 of the firebrick hearth 1 through the air pipe 22 to supply oxygen to the intensified combustion chamber 11;
broken and burned straw falls onto the chain grate 2 through the feed inlet 6, the isobaric air chamber at the lower part of the chain grate 2 supplies air in a proper amount, the straw is burnt to separate out a large amount of volatile components and is filled in the semi-gasification combustion chamber 10, the burning temperature of the straw does not reach the ash melting point of straw ash because the density of the straw becomes small after the straw bundle is broken, the straw is not easy to coke during burning, and meanwhile, the temperature of the semi-gasification combustion chamber 10 is controlled below 800 ℃ and is lower than the ash melting point, so that the coking can be effectively prevented, and the generation of nitrogen oxides is inhibited; gas generated in the semi-gasification combustion chamber 10 enters the intensified combustion chamber 11 through the flame ports 13;
in the process, straws which are not completely combusted in the semi-gasification combustion chamber 10 are flatly laid on the traveling grate 2 in the space below the partition wall 9, and solid carbon formed under the action of radiant heat of the rear arch 8 is combusted and burned out in the fixed carbon burnout chamber 12 along with the uniform motion of the traveling grate 2 and the uniform air distribution of the isobaric air chamber; the main shaft pipes 26 of the material stirring rollers, which are positioned at the lower part of the fixed carbon burnout chamber 12 and on the chain grate 2, can further stir and disperse the unburnt fuel to be burnt out, and meanwhile, the second air blower 29 is started to bring cooling air into the main shaft pipes 26 of the material stirring rollers, so that the continuous cooling protection of the two main shaft pipes 26 of the material stirring rollers and other corresponding structures is realized, and the cooling air supplies oxygen to the unburnt fuel through the air holes 28 on the main shaft pipes 26 of the material stirring rollers, so that the fuel can be fully burnt out;
the high-temperature flue gas fully combusted in the fixed carbon burnout chamber 12 flows through the flue gas outlet 14 to enter the reinforced combustion chamber 11 and is converged with the flue gas sprayed out from the semi-gasification combustion chamber 10 for secondary combustion, split-phase convergent combustion is realized in the process, the concentration of the generated nitrogen oxide is low, and the atmosphere environmental protection effect is good;
high-temperature smoke generated in the intensified combustion chamber 11 flows out from the high-temperature smoke outlet 15, heat is exchanged through the heat exchanger, and the high-temperature clean air after heat exchange is used for drying grains.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a straw bundle burns direct combustion grain stoving hot-blast furnace which characterized in that includes: the device comprises a firebrick hearth (1), a chain grate (2), a straw drying and bag breaking chamber (3), an air-cooled material stirring device (4) and a feeding device (5);
a front wall (7) of the firebrick hearth (1) is provided with a feed inlet (6), the feed inlet (6) is used for conveying the broken straws into the firebrick hearth (1) through the traveling grate (2), the rear end of the firebrick hearth (1) is provided with a rear arch (8), a separation wall (9) is arranged between the front wall (7) and the rear arch (8) of the firebrick hearth (1), and the separation wall (9), the front wall (7) and the firebrick hearth (1) jointly enclose a semi-gasification combustion chamber (10); the top wall of the rear arch (8), the separation wall (9) and the firebrick hearth (1) jointly enclose a strengthened combustion chamber (11); the lower wall of the rear arch (8), the partition wall (9) and the firebrick hearth (1) jointly enclose a fixed carbon burnout chamber (12), a flame jet (13) for communicating the semi-gasification combustion chamber (10) with the intensified combustion chamber (11) is arranged on the partition wall (9), a flue gas outlet (14) for communicating the intensified combustion chamber (11) with the fixed carbon burnout chamber (12) is arranged at the end part of the rear arch (8) close to the partition wall (9), a high-temperature flue gas outlet (15) is arranged at the rear upper part of the intensified combustion chamber (11), and the high-temperature flue gas outlet (15) is communicated with a flue gas inlet of a heat exchanger;
the straw drying and bag breaking chamber (3) is arranged in front of the feeding hole (6) of the firebrick hearth (1), and an air-cooled straw bag breaking device (16) is arranged in the straw drying and bag breaking chamber; the air-cooled straw bale breaking device (16) comprises a bale breaking roller assembly, the bale breaking roller assembly is fixed on the side wall of the straw drying bale breaking chamber (3) through bearing seats (18) at two ends and is used for breaking straw bales, one end of the bale breaking roller assembly is connected with a first air blower (21) through an air pipe (22), and the other end of the bale breaking roller assembly is communicated with the reinforced combustion chamber (11) through the air pipe (22);
the chain grate (2) is horizontally arranged at the bottom of the straw drying bag breaking chamber (3) and the firebrick hearth (1), and gaps are reserved between the top surface of the chain grate (2) and the upper end of the feed inlet (6) at the lower part of the firebrick hearth front wall (7) as well as the bottom end of the partition wall (9); a plurality of air chambers are arranged below the chain grate (2) along the conveying direction;
the air-cooled material stirring device (4) is arranged at the lower part of the fixed carbon burnout chamber (12) in the firebrick hearth (1) and above the traveling grate (2), the air-cooled material stirring device (4) comprises a material stirring roller assembly, and the material stirring roller assembly is fixed on the side wall of the firebrick hearth (1) through bearing seats (18) at two ends and is used for stirring and scattering unburnt straw fuel to burn out;
the feeding device (5) is arranged at the front end of the straw drying and bag breaking chamber (3) and used for conveying the straw bundles into the straw drying and bag breaking chamber (3).
2. The straw bale-burning direct-combustion grain drying hot blast stove according to claim 1, wherein the bale breaking roller assembly comprises two bale breaking roller main shaft pipes (17) arranged in the straw drying bale breaking chamber (3) side by side; two ends of each bale breaking roller main shaft pipe (17) are rotatably connected with the side walls of two sides in the straw drying bale breaking chamber (3) through bearing seats (18), and the two bale breaking roller main shaft pipes (17) rotate oppositely; the outer side walls of the two bag breaking roller main shaft pipes (17) are provided with a plurality of bag breaking thorns (19); the inner parts of the two bag breaking roller main shaft pipes (17) are both provided with air channels (20); one ends of the air channels (20) of the two bag breaking roller main shaft pipes (17) are respectively connected with a first air blower (21) through an air pipe (22), and the other ends of the air channels are respectively communicated with the intensified combustion chamber (11) through the air pipe (22).
3. The straw bundle-burning direct-combustion grain drying hot blast stove according to claim 2, characterized in that two of the two bale breaking roller main shaft pipes (17) are provided with bale breaking roller chain wheels at one end in the same direction, and a first transmission motor (23) is arranged on the outer wall of the straw drying bale breaking chamber (3) at one side of the one end, the first transmission motor (23) is positioned between the two bale breaking roller chain wheels, two first transmission motor chain wheels (24) opposite to the two bale breaking roller chain wheels are respectively arranged on the output shaft of the first transmission motor (23), and the bale breaking roller chain wheels and the first transmission motor chain wheels (24) corresponding thereto realize transmission through chains (25).
4. The straw-bale-burning direct-combustion grain drying hot blast stove according to claim 1, characterized in that the poking roller assembly comprises two poking roller main shaft pipes (26) arranged side by side in the firebrick furnace (1); both ends of each material poking roller main shaft pipe (26) are rotatably connected with the side walls of the two sides in the firebrick hearth (1) through bearing seats (18); the outer side walls of the two material shifting roller main shaft pipes (26) are provided with a plurality of material shifting thorns (27); the inner parts of the two main shaft pipes (26) of the material poking roller are both provided with air ducts (20); the outer side walls of the two material poking roller main shaft pipes (26) are provided with a plurality of air holes (28) communicated with the air duct (20); one end of one of the material stirring roller main shaft pipes (26) is connected with a second air blower (29) through an air pipe (22), the end part of one end of the other material stirring roller main shaft pipe (26) in the same direction is sealed, and the other ends of the two material stirring roller main shaft pipes (26) in the same direction are communicated through the air pipe (22).
5. The straw bundle-burning direct-combustion grain drying hot blast stove according to claim 4, characterized in that one end of the two main shaft pipes (26) of the material poking roller is provided with a material poking roller chain wheel (31) in the same direction, and a second transmission motor (30) is arranged on the outer wall of the firebrick hearth (1) on one side of the end, the second transmission motor (30) is arranged between the two material poking roller chain wheels (31), the output shaft of the second transmission motor (30) is respectively provided with two second transmission motor chain wheels opposite to the two material poking roller chain wheels (31), and the material poking roller chain wheels (31) and the second transmission motor chain wheels corresponding to the material poking roller chain wheels are driven by a chain (25).
6. The straw bundle-burning direct-combustion grain drying hot blast stove according to any one of claims 1 to 5, wherein the feeding device (5) comprises a feeding device main body (32), a lifting bracket (33) for supporting the straw bundle is arranged inside the feeding device main body (32), the lifting bracket (33) is driven by a lifting mechanism (34) to move up and down, and bracket guide mechanisms (35) for guiding the lifting bracket (33) to move up and down are further arranged on two side walls in the feeding device main body (32).
7. The straw-bundle-burning direct-combustion grain drying hot blast stove according to any one of claims 1 to 5, characterized in that a gap of 1000-1300mm is formed between the upper end of the feed inlet (6) at the lower part of the firebrick hearth front wall (7) and the top surface of the traveling grate (2); and a clearance of 800-1000mm is formed between the bottom end of the partition wall (9) and the top surface of the traveling grate (2).
8. The straw-bale-burning direct-combustion grain drying hot blast stove according to any one of claims 1 to 5, characterized in that the plenum is an isobaric plenum and is uniformly distributed below the traveling grate (2).
9. The straw-bundle-burning direct-combustion grain drying hot blast stove according to any one of claims 1 to 5, characterized in that the rear end of the traveling grate stoker (2) is provided with a recovery processing device for recovering and processing straw-burning waste residues.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021124349.3U CN212361992U (en) | 2020-06-17 | 2020-06-17 | Straw bundle burning direct-combustion grain drying hot-blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021124349.3U CN212361992U (en) | 2020-06-17 | 2020-06-17 | Straw bundle burning direct-combustion grain drying hot-blast stove |
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| Publication Number | Publication Date |
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| CN212361992U true CN212361992U (en) | 2021-01-15 |
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| CN202021124349.3U Active CN212361992U (en) | 2020-06-17 | 2020-06-17 | Straw bundle burning direct-combustion grain drying hot-blast stove |
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| CN (1) | CN212361992U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11852409B2 (en) * | 2020-07-24 | 2023-12-26 | Triple Green Products Inc. | Use of biomass furnace for direct air-drying of grain and other particulate |
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2020
- 2020-06-17 CN CN202021124349.3U patent/CN212361992U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11852409B2 (en) * | 2020-07-24 | 2023-12-26 | Triple Green Products Inc. | Use of biomass furnace for direct air-drying of grain and other particulate |
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Denomination of utility model: Straw bundle burning direct burning grain drying hot blast stove Effective date of registration: 20220509 Granted publication date: 20210115 Pledgee: Industrial Bank Co.,Ltd. Harbin Branch Pledgor: HAILUN LIMIN ENERGY SAVING BOILER MANUFACTURING Co.,Ltd. Registration number: Y2022230000014 |