CN205048423U - Biomass combustion system - Google Patents

Abstract

The utility model discloses a biomass combustion system, the utility model provides a biomass combustion system, including a plurality of combustion chambers of arranging in proper order, begin from first combustion chamber, previous combustion chamber discharge fume a section of thick bamboo all with the furnace intercommunication of a back combustion chamber, discharging fume of final combustion chamber tin is used for the flue gas discharge, wherein, every combustion chamber all includes furnace body, feed arrangement, dust discharging device and fluidized -bed combustion stove, it is unrestricted that this kind of biomass combustion system makes biomass fuel select, also need not mix several kinds of biomass fuel according to certain ratio, work load has been reduced, biomass fuel's application range has been enlarged, utilize the flue gas waste heat to heat to furnace, and simultaneously, send into the high pressure draught in to the fluidized -bed combustion ware through first air -blower, drive the biomass fuel boiling, make its and air intensive mixing, guarantee the abundant burning of fuel, avoid the emergence of coking phenomenon, the efficiency of the boiler is improved, reduce and discharge.

Description

A kind of biomass combustion system

Technical field

The utility model relates to biomass boiler equipment technical field, particularly a kind of biomass combustion system.

Background technology

Along with the day by day sternness of problem of environmental pollution; the day by day exhaustion of existing fossil energy sources; readjust the energy structure; the energy of a large amount of use clean environment firendly replaces the fuel such as coal, oil, natural gas of heavy contamination to become the focus of countries in the world concern; in the existing clean environment firendly energy; biomass fuel is due to the advantage of its cheap, clean environmental protection; become the new lover of this area; biomass fuel is used to effectively utilize natural resources; can greenhouse gas emission be reduced again, protect our living environment.Therefore, countries in the world all energetically research and development utilize biomass fuel burning technology.

In prior art, biomass fuel generally comprises the agriculture and forestry organic waste materials such as straw, straw, vinasse, due to calorific value and the ash fusion point difference of these biomass fuels, when burning together, need the generation mixing to avoid coking phenomenon by a certain percentage, this have received restriction with regard to making the selection of biomass fuel, add workload, reduce the scope of application of biomass fuel, simultaneously, biomass fuel is in static state in combustion, easy coking, burn insufficient, ignition temperature is low, tail-off time is long, causes boiler operating efficiency lower.

Therefore, how a kind of biomass combustion device is provided, make it the selection of biomass fuel can be made unrestricted while, ensure that it fully contacts with air, Thorough combustion, avoids the generation of coking phenomenon, reduces workload, rationally and utilize biomass fuel fully, the important technological problems that those skilled in the art are urgently to be resolved hurrily is become.

Utility model content

In view of this, the utility model provides a kind of biomass combustion system, make it the selection of biomass fuel can be made unrestricted while to reach, ensure that it fully contacts with air, Thorough combustion, avoid the generation of coking phenomenon, reduce workload, rationally and utilize the object of biomass fuel fully.

For achieving the above object, the utility model provides following technical scheme:

A kind of biomass combustion system, comprise multiple combustion chamber be arranged in order, from first combustion chamber, the smoke exhaust barrel of previous combustion chamber is all communicated with the burner hearth of a rear combustion chamber, the smoke exhaust barrel of last combustion chamber is used for flue gas to discharge, and multiple described combustion chamber includes:

Body of heater, is provided with ash discharging hole;

Be arranged on the feed arrangement on described body of heater, the discharging opening of described feed arrangement is communicated with the burner hearth of described body of heater;

Be arranged on the ash exhauster in burner hearth, described ash exhauster is positioned at below the discharging opening of described feed arrangement, for living beings lime-ash is sent to described ash discharging hole;

Boiling burner, comprise inner casing, shell and the first air blast, described inner casing and described shell to be arranged in described body of heater and between described feed arrangement discharging opening and described ash exhauster, described inner casing is nested in described shell and also and between described shell forms air cavity, the sidewall of described inner casing offers multiple pore, described shell is provided with ash releasing tube and blast pipe, described ash releasing tube is arranged on described outer casing bottom and extends to outside described body of heater, described blast pipe one end is communicated with described air cavity, and the other end is connected with described first blower outlet.

Preferably, described smoke exhaust barrel is all arranged on the top of described combustion chamber, through bending after after the bottom of a combustion chamber be communicated with the burner hearth of this combustion chamber.

Preferably, described biomass combustion system comprises first-stage burning room, combustion chamber, the second level and third level combustion chamber, the ash exhauster of described first-stage burning room and combustion chamber, the described second level is chain-type slag remover, and the ash exhauster of described third level combustion chamber is without chain-type slag remover.

Preferably, described first-stage burning room, combustion chamber, the described second level and described third level combustion chamber are all connected with the second air blast.

Preferably, described feed arrangement comprises hopper and conveying device, and the outlet of described hopper is communicated with the charging aperture of described conveying device, and the discharging opening of described conveying device is communicated with the burner hearth of described body of heater.

Preferably, described hopper comprises feeding-passage and heat exchanging part, and feeding-passage has import and outlet, and described outlet is towards described conveying device; Described heat exchanging part is wrapped in the outside of described feeding-passage, is provided with gas approach and exhanst gas outlet, and described gas approach is communicated with the waste gas outlet of biomass combustion system.

Preferably, described heat exchanging part comprises:

Housing, is arranged on outside described feeding-passage, forms heat exchanging interlayer between described housing and described feeding-passage, and described gas approach and described exhanst gas outlet are all arranged on the housing;

Multiple fin, staggered is arranged in described heat exchanging interlayer.

Preferably, the bottom near described conveying device in described feeding-passage is provided with filtering device, and described filtering device comprises filter net device and magnet filter.

Preferably, the discharging opening of described feed arrangement is provided with fireproof tempering device, described fireproof tempering device comprises lifting portion and cover plate, described lifting portion is hollow and two ends all have the tubular of opening, its one end is communicated with described feed arrangement discharging opening, the other end is hinged with described cover plate, and described lifting portion is inclined upwardly and meets 30 °≤α≤50 ° with the angle α of horizontal plane.

Preferably, the angle β of described feed arrangement and horizontal plane meets 8 °≤β≤15 °, and described lifting portion tilts upward away from the opening of one end of described feed arrangement, and the angle γ of its place plane and described horizontal plane meets 30 °≤γ≤50 °.

As can be seen from technique scheme, the biomass combustion system that the utility model provides, comprise multiple combustion chamber be arranged in order, from first combustion chamber, the smoke exhaust barrel of previous combustion chamber is all communicated with the burner hearth of a rear combustion chamber, and the smoke exhaust barrel of last combustion chamber is used for flue gas to discharge, wherein, each combustion chamber includes body of heater, feed arrangement, ash exhauster and fluidizing combustion furnace, and body of heater is provided with ash discharging hole; Feed arrangement is arranged on body of heater, and the discharging opening of feed arrangement is communicated with the burner hearth of body of heater; Ash exhauster is arranged in burner hearth, and ash exhauster is positioned at below the discharging opening of feed arrangement, for living beings lime-ash is sent to ash discharging hole; Boiling burner comprises inner casing, shell and the first air blast, inner casing and shell to be arranged in body of heater and between feed arrangement discharging opening and ash exhauster, inner casing is nested also and between shell forms air cavity in the enclosure, the sidewall of inner casing offers multiple pore, shell is provided with ash releasing tube and blast pipe, ash releasing tube is arranged on outer casing bottom and extends to outside body of heater, and blast pipe one end is communicated with air cavity, and the other end is connected with the first blower outlet;

By arranging multiple combustion chamber, in use, can multiple biomass fuel be placed in each combustion chamber be arranged in order from low to high according to calorific value and ash fusion point respectively, like this, calorific value and the ash fusion point of the biomass fuel used in first combustion chamber are minimum, temperature required for it also the most easily reaches, the high-temperature flue gas that its burning produces is entered in a rear combustion chamber by aiutage and carries out preheating, improve furnace temperature, for the burning of the calorific value in this combustion chamber and the higher biomass fuel of ash fusion point is prepared, so that it is temperature required to reach it fast, avoid the generation of coking phenomenon, combustion chamber below by that analogy, in combustion, by the thrust of mixing merga pass air-flow to boiling burner feeding air and biomass fuel by air blast, biomass fuel is seethed in boiling burner, thus biomass fuel is in combustion dynamically fully mix with air, as can be seen here, this biomass combustion system can use multiple biomass fuel simultaneously, biomass fuel is selected unrestricted, also several biomass fuel need not be mixed according to a certain ratio, reduce workload, expand the biomass fuel ground scope of application, fume afterheat is utilized to heat to burner hearth, simultaneously, in the combustion process of biomass fuel, in boiling burner, high pressure draught is sent into by the first air blast, drive biomass fuel seethes with excitement, it is made fully to mix with air, ensure that the Thorough combustion of biomass fuel, avoid the generation of coking phenomenon, improve the efficiency of boiler, reduce discharge, finally, biomass ash after various biomass combustion can be different according to characteristic, store classifiedly, storage, reasonable employment.

Accompanying drawing explanation

In order to be illustrated more clearly in a kind of embodiment of the utility model or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the structural representation of biomass combustion system in a kind of embodiment of the utility model;

Fig. 2 is biomass combustion system combustion chamber structural representation in a kind of embodiment of the utility model;

Fig. 3 is the structural representation of biomass combustion system in the another kind of embodiment of the utility model;

Fig. 4 is the structural representation of hopper in biomass combustion system in the utility model embodiment;

Fig. 5 is the structural representation of filtering device in biomass combustion system in the utility model embodiment

Fig. 6 is the structure for amplifying schematic diagram of fireproof tempering device in biomass combustion system in the utility model embodiment.

Detailed description of the invention

The utility model provides a kind of biomass combustion system, makes it the selection of biomass fuel can be made unrestricted while, ensure that it fully contacts with air to reach, Thorough combustion, avoid the generation of coking phenomenon, reduce workload, rationally and utilize the object of biomass fuel fully.

Below in conjunction with the accompanying drawing in a kind of embodiment of the utility model, technical scheme in a kind of embodiment of the utility model is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

Refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of biomass combustion system in a kind of embodiment of the utility model; Fig. 2 is biomass combustion system combustion chamber structural representation in a kind of embodiment of the utility model.

A kind of biomass combustion system that the utility model provides, comprise multiple combustion chamber be arranged in order, from first combustion chamber, the smoke exhaust barrel 5 of previous combustion chamber is all communicated with the burner hearth of a rear combustion chamber, and the smoke exhaust barrel 5 of last combustion chamber is for discharging flue gas.

Wherein, each combustion chamber includes body of heater, feed arrangement, ash exhauster and fluidizing combustion furnace, body of heater is provided with ash discharging hole 19; Feed arrangement is arranged on body of heater, and the discharging opening of feed arrangement is communicated with the burner hearth of body of heater; Ash exhauster is arranged in burner hearth, and ash exhauster is positioned at below the discharging opening of feed arrangement, for living beings lime-ash is sent to ash discharging hole 19; Boiling burner comprises inner casing 16, shell 17 and the first air blast 21, inner casing 16 and shell 17 to be arranged in body of heater and between feed arrangement discharging opening and ash exhauster, inner casing 16 is nested in shell 17 and also and between shell 17 forms air cavity, the sidewall of inner casing 16 offers multiple pore 15, shell 17 is provided with ash releasing tube 18 and blast pipe 20, ash releasing tube 18 to be arranged on bottom shell 17 and to extend to outside body of heater, blast pipe 20 one end is communicated with air cavity, and the other end is connected with the first air blast 21 air outlet.

Compared with prior art, the biomass combustion system that the utility model provides, by arranging multiple combustion chamber, in use, can multiple biomass fuel be placed in each combustion chamber be arranged in order from low to high according to calorific value and ash fusion point respectively, like this, calorific value and the ash fusion point of the biomass fuel used in first combustion chamber are minimum, temperature required for it also the most easily reaches, the high-temperature flue gas that its burning produces is entered in a rear combustion chamber by aiutage and carries out preheating, improve furnace temperature, for the burning of the calorific value in this combustion chamber and the higher biomass fuel of ash fusion point is prepared, so that it is temperature required to reach it fast, avoid the generation of coking phenomenon, combustion chamber below by that analogy, in combustion, the thrust of mixing merga pass air-flow to boiling burner feeding air and biomass fuel by the first air blast 21 makes biomass fuel seethe in boiling burner, thus biomass fuel is in combustion dynamically fully mix with air, as can be seen here, this biomass combustion system can use multiple biomass fuel simultaneously, biomass fuel is selected unrestricted, also several biomass fuel need not be mixed according to a certain ratio, reduce workload, expand the biomass fuel ground scope of application, fume afterheat is utilized to heat to burner hearth, simultaneously, in the combustion process of biomass fuel, in boiling burner, high pressure draught is sent into by air blast, drive biomass fuel seethes with excitement, it is made fully to mix with air, ensure that the Thorough combustion of biomass fuel, avoid the generation of coking phenomenon, improve the efficiency of boiler, reduce discharge, finally, biomass ash after various biomass combustion can be different according to characteristic, store classifiedly, storage, reasonable employment.

High-temperature flue gas can move upward, in order to enable high-temperature flue gas, even preheating is carried out to burner hearth, ensure the Thorough combustion of biomass fuel, in a kind of embodiment of the utility model, smoke exhaust barrel 5 is all arranged on the top of combustion chamber, through bending after after the bottom of a combustion chamber be communicated with the burner hearth of this combustion chamber, like this, by smoke exhaust barrel 5 being arranged on the top of previous combustion chamber, the high-temperature flue gas produced in this combustion chamber can be derived fast, then it is made to enter the burner hearth of a rear combustion chamber from the bottom of a rear combustion chamber, utilize the feature that it rises, to burner hearth from down to up carry out full and uniform preheating, ensure the even of a rear burning indoor temperature, thus ensure the Thorough combustion of its endogenous substance fuel, improve efficiency of combustion.

Biomass combustion system according to the kind of the biomass fuel obtained and can need the combustion chamber arranging varying number, in a kind of embodiment of the utility model, in order to optimize technique scheme further, biomass combustion system comprises first-stage burning room 1, combustion chamber, the second level 2 and third level combustion chamber 3, first-stage burning room 1, combustion chamber, the second level 2 and third level combustion chamber 3 include body of heater, feed arrangement and ash exhauster, wherein, body of heater is provided with ash discharging hole 19; The discharging opening that feed arrangement is arranged on body of heater upper feeding device is communicated with the burner hearth of body of heater; Ash exhauster is arranged in burner hearth, and ash exhauster is positioned at below the discharging opening of feed arrangement, for living beings lime-ash is sent to ash discharging hole 19.

In actual use, first-stage burning room 1 uses straw biological particles as fuel usually, Control for Kiln Temperature is at 400 DEG C ~ 600 DEG C, combustion chamber, the second level 2 uses distiller biomass particle to be fuel usually, Control for Kiln Temperature is at 500 DEG C ~ 800 DEG C, these two kinds of biomass fuel calorific values and ash fusion point lower, for how grey, the low forms of life matter of low melting point, the easy coking of misoperation, difficulty is caused to deashing, therefore, for reducing operation easier, in a kind of embodiment of the utility model, the ash exhauster of first-stage burning room 1 and combustion chamber, the second level 2 is chain-type slag remover 8.

The third level combustion chamber more than 3 be positioned at after first-stage burning room 1 and combustion chamber, the second level 2 uses wood chip biological particles or straw biomass particle to be fuel; Control for Kiln Temperature the calorific value of 900 DEG C ~ 1200 DEG C of these two kinds of fuel and ash fusion point higher; for few ash; dystectic advanced bio matter fuel; so in a kind of embodiment of the utility model, the ash exhauster of third level combustion chamber 3 is without chain-type slag remover 7.

For the ease of understanding in time to regulate intake for the combustion case in combustion chamber, ensure fully carrying out of burning, in a kind of embodiment of the utility model, the body of heater of first-stage burning room 1, combustion chamber, the second level 2 and third level combustion chamber 3 is provided with observation window 12, operating personnel can grasp combustion case in time by observation window 12, thus regulate intake to ensure the Thorough combustion of fuel.

For the ease of the discharge of the flue gas of last combustion chamber, in a kind of embodiment of the utility model, the smoke exhaust barrel 5 of third level combustion chamber 3 is connected with air-introduced machine 6.

First-stage burning room 1 is for the burning of ash fusion point and the low biomass fuel of calorific value, as straw biological particles etc., combustion chamber, the second level 2 is for the burning of ash fusion point and the lower biomass fuel of calorific value, as distiller biomass particle etc., third level combustion chamber 3 for the burning of ash fusion point and the higher biomass fuel of calorific value, as straw biomass particle, wood chip biological particles etc.

In order to ensure there is sufficient air in combustion chamber to ensure the Thorough combustion of biomass fuel, in a kind of embodiment of the utility model, first-stage burning room 1, combustion chamber, the second level 2 and third level combustion chamber 3 are all connected with the second air blast 9.

Except the above-mentioned biomass combustion system with three combustion chambers, biomass combustion system also can have the combustion chamber of varying number according to biomass fuel kind, in the another kind of embodiment of the utility model, refer to Fig. 3, Fig. 3 is the structural representation of biomass combustion system in the another kind of embodiment of the utility model, biomass combustion system comprises first-stage burning room 1, combustion chamber, the second level 2, third level combustion chamber 3 and fourth stage combustion chamber 4, first-stage burning room 1 with straw biological particles for fuel, Control for Kiln Temperature is at 400 DEG C ~ 600 DEG C, combustion chamber, the second level 2 with distiller biomass particle for fuel, Control for Kiln Temperature is at 500 DEG C ~ 800 DEG C, third level combustion chamber 3 with biological stalk matter particle for fuel, Control for Kiln Temperature is at 700 DEG C ~ 1000 DEG C, fourth stage combustion chamber 4 with wood chip biological particles for fuel, Control for Kiln Temperature is at 900 DEG C ~ 1200 DEG C.

Feed arrangement can adopt various structures, as ribbon conveyer, chain conveyor etc., in a kind of embodiment of the utility model, feed arrangement comprises hopper 10 and conveying device 11, the outlet of hopper 10 is communicated with the charging aperture of conveying device 11, and the discharging opening of conveying device 11 is communicated with the burner hearth of body of heater.

The fuel made moist can cause fire box temperature low when burning, to catch fire difficulty, time serious, even can cause the situation of burner hearth coking, and a large amount of high-temperature flue gas after burning directly enter air, not only pollute environment, also create energy waste, reduce boiler thermal output, therefore, in order to optimize technique scheme further, in the utility model embodiment, refer to Fig. 4, Fig. 4 is the structural representation of hopper in biomass combustion system in the utility model embodiment, feed arrangement comprises hopper 10 and conveying device 11, and hopper 10 comprises feeding-passage 101 and heat exchanging part, and feeding-passage 101 has import and outlet, exports towards conveying device 11, heat exchanging part is wrapped in the outside of feeding-passage 101, be provided with gas approach and exhanst gas outlet, gas approach is communicated with the waste gas outlet of biomass combustion system, in use, biomass fuel enters feeding-passage 101 from import, and fall along feeding-passage 101, in dropping process, with the boiler smoke generation heat exchange in the heat exchanging part be wrapped in outside feeding-passage 101, the high-temperature flue gas of being discharged by boiler and biomass fuel carry out heat exchange, oven dry heating is carried out to biomass fuel, it is made to catch fire easily, sufficient combustion, the generation of coking phenomenon can be avoided, meanwhile, flue-gas temperature reduces, the preheating of biomass fuel contributes to the raising of boiler hearth temperature, and then improve the thermal efficiency of boiler.

Heat exchanging part can adopt various structures, in the utility model embodiment, heat exchanging part comprises housing 102 and fin 103, wherein, housing 102 is arranged on outside feeding-passage 101, form heat exchanging interlayer between housing 102 and feeding-passage 101, gas approach and exhanst gas outlet are all arranged on housing 102; Fin 103 has multiple, staggered is arranged in heat exchanging interlayer, like this, flue gas is entering after in radiating part, due to the fin 103 be crisscross arranged, the flowing velocity of flue gas can be effectively reduced, make it to carry out sufficient heat exchange with the biomass fuel in feeding-passage 101, improve the utilization ratio to fume afterheat.

In order to avoid scattering and disappearing of heat, in the utility model embodiment, the outer wall of housing 102 being provided with heat-insulation layer, by arranging heat-insulation layer, the loss that fume afterheat is brought to external radiation by housing 102 can being reduced, improve the utilization rate of fume afterheat; Heat-insulation layer can adopt multiple material to make, such as, and asbestos fibre heat-insulation layer or fiberglass insulation.

The gas approach of heat exchanging part can directly be communicated with the waste gas outlet of boiler, also can be communicated with the waste gas outlet of boiler by air-supply arrangement, in the utility model embodiment, in order to raising efficiency, gas approach is connected by air-introduced machine 6 with the waste gas outlet of biomass boiler.

In order to avoid the harmful substance heat exchanging portion in flue gas causes corrosion at housing 102 and fin 103, affect the service life of heat exchanging part, in the utility model embodiment, gas approach is provided with filtrating equipment of flue gas.

Feeding-passage 101 can adopt various structures, such as straight-tube shape etc., in the utility model embodiment, in order to improve heat exchange efficiency, feeding-passage 101 have employed three stage structure, comprise the inducer be connected successively, middle diffuser and converging portion, the diameter of middle diffuser is greater than inducer diameter, converging portion is reduced diameter from the one end be connected with middle diffuser, like this, in the dropping process of biomass fuel, the middle diffuser that diameter is larger is entered after inducer, biomass fuel can be made fully to scatter, make the pre-heating drying of biomass fuel more thorough, then, biomass fuel enters boiler furnace burning after converging portion converges.

Biomass fuel too fast meeting of falling in feeding-passage 101 causes with flue gas heat exchange insufficient, pre-heating drying effect is undesirable, therefore, in order to optimize technique scheme further, in a kind of embodiment of the utility model, the inwall of middle diffuser is multiple to the centroclinal downward buffer board of middle diffuser every being crisscross arranged between the upper and lower, like this, what biomass fuel can replace in dropping process falls on each buffer board, the falling speed of biomass fuel can be effectively reduced, make it to carry out sufficient heat exchange if having time with flue gas, improve the utilization rate of fume afterheat.

Certainly, above-mentioned fuel buffer unit also can adopt other structure, and such as, in the another kind of embodiment of the utility model, the inwall of middle diffuser is provided with the slideway under screw, ways-end is towards converging portion.

Preferably, in order to further improve the drying effect of biomass fuel pre-heating drying device, in the utility model embodiment, the top of middle diffuser is provided with blower fan, the air circulation in middle diffuser can be strengthened by blower fan, further improve the drying effect of biomass fuel.

Bulk impurity and irony impurity is easily mixed in biomass fuel, the generation of the phenomenon such as cause coking and get stuck, harmful effect is brought to the normal use production of biomass boiler, therefore, in order to optimize technique scheme further, in the utility model embodiment, refer to Fig. 5, Fig. 5 is the structural representation of filtering device in biomass combustion system in the utility model embodiment; Bottom near conveying device 11 in feeding-passage 101 is provided with filtering device, filtering device comprises filter net device 22 and magnet filter 23, by installing filter net device 22 and magnet filter 23 in feeding-passage 101 additional, can bulk impurity in filtering fuel and irony impurity, can effectively avoid coking and the generation of the phenomenon that gets stuck, ensure that the normal table of biomass boiler runs.

Magnet filter 23 can adopt various structures, and such as, in a kind of embodiment of the utility model, magnet filter 23 comprises one or more and is fixed on annular magnet on feeding-passage 101 inwall.

Certainly, magnet filter 23 can be arranged on above filter net device 22, also can be arranged on the below of filter net device 22, and in the utility model embodiment, magnet filter 23 is arranged on the below of filter net device 22.

When magnet filter 23 is this permanent magnet of above-mentioned annular magnet, although the irony impurity in fuel can be removed, but because its magnetic unanimously exists, be not easy in the future for the cleaning of these impurity, especially when in impurity containing when being similar to the sharp object of iron nail, easily cleaning personnel are damaged, therefore, in order to optimize such scheme further, in the another kind of embodiment of the utility model, magnet filter 23 is electromagnet, comprise iron core and be wrapped in the outer and conductive winding be connected with power supply of iron core, wherein, iron core needs to use demagnetization, and soft iron or silicon steel material make faster, by adopting the electromagnet of this structure, when clearing up the irony impurity on magnet filter 23, power supply and conductive winding being disconnected to make magnet filter 23 lose magnetism, irony impurity attached thereto falls naturally, while being convenient to cleaning and collection, avoid the injury to cleaning personnel.

Preferably, in order to ensure the filter effect of electromagnet, in the utility model embodiment, above-mentioned magnet filter 23 is provided with multiple, is uniformly distributed along feeding-passage 101 circumference.

Filter net device 22 can be made up of a screen pack, also can be made up of multiple screen pack as required, in a kind of embodiment of the utility model, in order to improve the filter effect of filter net device 22, filter net device 22 comprises multiple screen pack increased successively along material falling direction order number.By this multiple filtration structure, more careful screening can be carried out to fuel, avoid the generation of coking phenomenon.

Further, in the utility model embodiment, filter net device 22 comprises the first screen pack and the second screen pack, and the order number of the first screen pack is 1-4 order, and the order number of the second screen pack is 8-10 order.

Above-mentioned its filter effect of filter net device 22 is certain, when different user demands, underaction, adaptability is poor, therefore, in the another kind of embodiment of the utility model, filter net device 22 comprises main filter screen and the secondary filter screen with the stacked setting of main filter screen, and secondary filter screen is connected with the extension adjustment device be positioned at outside hopper 10.Like this, secondary filter screen and main filter screen can be driven to misplace by extension adjustment device, to reach the object changing filter net device 22 order number, or directly secondary filter screen is taken away main filter screen position, only use main filter screen to filter, by this structure, can when not to filter net device 22 structure be changed, change the filter effect of filter, add the flexibility of filter greatly, different user demands can be met.

Extension adjustment device can adopt various structures to realize, such as chain telescoping mechanism, the expansion bend etc. that intersects, and in the utility model embodiment, extension adjustment device comprises support and piston cylinder, and wherein, support is fixed on hopper 10 outer wall; The cylinder body of piston cylinder is fixed on support, and the piston rod of piston cylinder is connected with the secondary filter screen in feeding-passage 101 through the flat groove on hopper 10 wall, and this extension adjustment device structure is simple, is convenient to make and safeguards.

In order to avoid feeding-passage 101 in use blocks, in the utility model embodiment, the outer wall bottom of hopper 10 is provided with vibration hammer, the outer wall of hopper 10 is provided with pressure regulator, wireway for pouring pressure-air into is all installed between vibration hammer and pressure regulator and on pressure regulator, the compressed-air actuated flow provided to vibration hammer is provided by pressure regulator, thus regulate the vibration force of vibration hammer, utilize the flowing of the material in the percussive assist hopper 10 of vibration hammer, prevent the blocking of feeding-passage 101.

In order to optimize technique scheme further, avoid the appearance of tempering phenomenon, in the utility model embodiment, refer to Fig. 6, Fig. 6 is the structure for amplifying schematic diagram of fireproof tempering device in biomass combustion system in the utility model embodiment, the discharging opening of feed arrangement is provided with fireproof tempering device, fireproof tempering device comprises lifting portion 13 and cover plate 14, lifting portion 13 is hollow and two ends all have the tubular of opening, its one end is communicated with feed arrangement discharging opening, the other end is hinged with cover plate 14, lifting portion 13 is inclined upwardly and meets 30 °≤α≤50 ° with the angle α of horizontal plane, by arranging a lifting portion 13 raised up at feed arrangement discharging opening, and in the outlet in lifting portion 13, cover plate 14 is set, in use, the lifting portion 13 of biomass fuel through raising up, wash open cover plate 14 parabolically shape be sprinkled in boiler furnace, in the dynamic process fallen, fully contact with air, sufficient combustion, efficiency of combustion is high, ignition temperature is high, tail-off time is short, and due to lifting portion 13 raise up and cover plate 14 can be good at avoiding the generation of tempering phenomenon, reach the thermal efficiency ensureing boiler, improve the object of security.

In order to improve the powder feeding efficiency of feed arrangement, and ensure that biomass fuel can be washed cover plate 14 open and fall into boiler furnace with parabolical form, in the utility model embodiment, the angle β of feed arrangement and horizontal plane meets 8 °≤β≤15 °.

Feed arrangement can adopt various structures, in the utility model embodiment, feed arrangement is conveying worm, conveying worm has the advantages such as structure is simple, good airproof performance, reliable operation, low cost of manufacture, be suitable for the conveying to bulk materials such as various powdery, graininess and little bulks, in use, it can play certain stirring action to biomass fuel, make it more even, and broken up by some biomass fuels lumpd, thus biomass fuel Thorough combustion can be made.

Lifting portion 13 can adopt various shape, such as straight-tube shape, bell mouth shape etc., no matter but be that straight-tube shape, its opening of bell mouth shape are all larger, be unfavorable for the generation avoiding tempering phenomenon, therefore, in the utility model embodiment, lifting portion 13 is from the one end be connected with feed arrangement to other end reduced diameter, like this, the port of export in lifting portion 13 diminishes, biomass fuel not only can be made more easily to wash cover plate 14 open, and better can avoid the generation of tempering phenomenon, improve the security of feed arrangement.

The length in lifting portion 13 can adopt different length according to the size of biomass fuel type and biomass boiler, and in the utility model embodiment, the length L in lifting portion 13 meets 80cm≤L≤100cm.

Lifting portion 13 outlet can adopt multiple towards, such as export place plane parallel with perpendicular, be tilted to down or tilt upward etc., but in actual use, parallel with perpendicular or be tilted to down and all easily make biomass fuel export in lifting portion 13 or lifting portion 13 combustion, and then cause the material in feed arrangement to burn, cause tempering, therefore, in order to optimize technique scheme further, in the utility model embodiment, lifting portion 13 tilts upward away from the opening of one end of feed arrangement, and the angle γ of its place plane and horizontal plane meets 30 °≤γ≤50 °, so, in guarantee, biomass fuel is dished out, and while falling with parabola, avoid the generation of tempering phenomenon, ensure security.

It is hinged that cover plate 14 can be accomplished in several ways with lifting portion 13, in the utility model embodiment, lifting portion 13 is provided with mount pad away from the top of one end of feed arrangement, mount pad is arranged hinged ear, cover plate 14 is cutting with scissors on ear by hinge, simultaneously, in order to prevent the biomass fuel gone out, cover plate 14 is rushed, make it to be in vertical state or to rotate greater angle to cause it to be difficult to fall with self gravitation, cannot continue to carry out capping to lifting portion 13, in the utility model embodiment, limited block is provided with above mount pad, can prevent cover plate 14 from rotating to vertical state or rotating greater angle by limited block, ensure its capping for lifting portion 13, fireproof tempering device is avoided to lose efficacy.

In order to further improve the anti-backfire effect of fireproof tempering device, in the utility model embodiment, cover plate 14 is provided with at least one circle annular protrusion, one end hinged with cover plate 14, lifting portion 13 is provided with the annular groove matched with annular protrusion, after the opening in lifting portion 13 covers by cover plate 14, annular protrusion coordinates with annular groove, like this, it is more tight that cover plate 14 can coordinate with lifting portion 13, improves anti-backfire effect.

Annular protrusion can adopt various shape, and in the utility model embodiment, the cross section of annular protrusion is circular or oval.

In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.

To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. a biomass combustion system, it is characterized in that, comprise multiple combustion chamber be arranged in order, from first combustion chamber, the smoke exhaust barrel (5) of previous combustion chamber is all communicated with the burner hearth of a rear combustion chamber, the smoke exhaust barrel (5) of last combustion chamber is for discharging flue gas, and multiple described combustion chamber includes:

Body of heater, is provided with ash discharging hole (19);

Be arranged on the feed arrangement on described body of heater, the discharging opening of described feed arrangement is communicated with the burner hearth of described body of heater;

Be arranged on the ash exhauster in burner hearth, described ash exhauster is positioned at below the discharging opening of described feed arrangement, for living beings lime-ash is sent to described ash discharging hole (19);

Boiling burner, comprise inner casing (16), shell (17) and the first air blast (21), described inner casing (16) and described shell (17) to be arranged in described body of heater and between described feed arrangement discharging opening and described ash exhauster, described inner casing (16) to be nested in described shell (17) and and form air cavity between described shell (17), the sidewall of described inner casing (16) offers multiple pore (15), described shell (17) is provided with ash releasing tube (18) and blast pipe (20), described ash releasing tube (18) is arranged on described shell (17) bottom and extends to outside described body of heater, described blast pipe (20) one end is communicated with described air cavity, the other end is connected with described first air blast (21) air outlet.

2. biomass combustion system according to claim 1, is characterized in that, described smoke exhaust barrel (5) is all arranged on the top of described combustion chamber, through bending after after the bottom of a combustion chamber be communicated with the burner hearth of this combustion chamber.

3. biomass combustion system according to claim 1, it is characterized in that, described biomass combustion system comprises first-stage burning room (1), combustion chamber, the second level (2) and third level combustion chamber (3), the ash exhauster of described first-stage burning room (1) and combustion chamber, the described second level (2) is chain-type slag remover (8), and the ash exhauster of described third level combustion chamber (3) is without chain-type slag remover (7).

4. biomass combustion system according to claim 3, it is characterized in that, described first-stage burning room (1), combustion chamber, the described second level (2) and described third level combustion chamber (3) are all connected with the second air blast (9).

5. biomass combustion system according to claim 1, it is characterized in that, described feed arrangement comprises hopper (10) and conveying device (11), the outlet of described hopper (10) is communicated with the charging aperture of described conveying device (11), and the discharging opening of described conveying device (11) is communicated with the burner hearth of described body of heater.

6. biomass combustion system according to claim 5, it is characterized in that, described hopper (10) comprises feeding-passage (101) and heat exchanging part, feeding-passage (101) has import and outlet, and described outlet is towards described conveying device (11); Described heat exchanging part is wrapped in the outside of described feeding-passage (101), is provided with gas approach and exhanst gas outlet, and described gas approach is communicated with the waste gas outlet of biomass combustion system.

7. biomass combustion system according to claim 6, is characterized in that, described heat exchanging part comprises:

Housing, is arranged on outside described feeding-passage, forms heat exchanging interlayer between described housing (102) and described feeding-passage, and described gas approach and described exhanst gas outlet are all arranged on described housing (102);

Multiple fin (103), staggered is arranged in described heat exchanging interlayer.

8. biomass combustion system according to claim 6, it is characterized in that, bottom near described conveying device (11) in described feeding-passage (101) is provided with filtering device, and described filtering device comprises filter net device (22) and magnet filter (23).

9. biomass combustion system according to claim 1, it is characterized in that, the discharging opening of described feed arrangement is provided with fireproof tempering device, described fireproof tempering device comprises lifting portion (13) and cover plate (14), described lifting portion (13) is for hollow and two ends all have the tubular of opening, its one end is communicated with described feed arrangement discharging opening, the other end is hinged with described cover plate (14), and described lifting portion (13) is inclined upwardly and meets 30 °≤α≤50 ° with the angle α of horizontal plane.

10. biomass combustion system according to claim 9, it is characterized in that, the angle β of described feed arrangement and horizontal plane meets 8 °≤β≤15 °, described lifting portion (13) tilts upward away from the opening of one end of described feed arrangement, and the angle γ of its place plane and described horizontal plane meets 30 °≤γ≤50 °.