CN107435953A - The coal-fired hot-air heating stove and its heating method and purposes of a kind of energy-conserving and environment-protective - Google Patents
The coal-fired hot-air heating stove and its heating method and purposes of a kind of energy-conserving and environment-protective Download PDFInfo
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- CN107435953A CN107435953A CN201710823657.1A CN201710823657A CN107435953A CN 107435953 A CN107435953 A CN 107435953A CN 201710823657 A CN201710823657 A CN 201710823657A CN 107435953 A CN107435953 A CN 107435953A
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- coal
- flue gas
- chimney
- fired hot
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 31
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 93
- 239000003546 flue gas Substances 0.000 claims abstract description 93
- 238000002485 combustion reaction Methods 0.000 claims abstract description 69
- 239000003245 coal Substances 0.000 claims description 58
- 238000002309 gasification Methods 0.000 claims description 29
- 239000002802 bituminous coal Substances 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000000197 pyrolysis Methods 0.000 claims description 7
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 6
- 239000003830 anthracite Substances 0.000 claims description 6
- 239000000571 coke Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims 1
- 238000010411 cooking Methods 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 8
- 239000000446 fuel Substances 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008236 heating water Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
- F24B7/00—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating
- F24B7/02—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating with external air ducts
- F24B7/025—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating with external air ducts with forced circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B90/00—Combustion methods not related to a particular type of apparatus
- F23B90/04—Combustion methods not related to a particular type of apparatus including secondary combustion
- F23B90/06—Combustion methods not related to a particular type of apparatus including secondary combustion the primary combustion being a gasification or pyrolysis in a reductive atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H7/00—Inclined or stepped grates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
- F24B13/00—Details solely applicable to stoves or ranges burning solid fuels
- F24B13/02—Arrangement or mountings of fire-grate assemblies; Arrangement or mountings of linings for fire-boxes, e.g. fire-backs
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
The invention provides a kind of coal-fired hot-air heating stove of energy-conserving and environment-protective and its heating method and purposes, the body of heater top side of the coal-fired hot-air heating stove is provided with chimney, heat-exchanger rig is set in the chimney, air distribution device is set outside chimney, the heat-exchanger rig includes tube side and shell, tube side leads in chimney the flue gas to circulate, and shell connects with air air-distribution device.The present invention in the chimney of coal-fired hot-air heating stove by setting heat-exchanger rig, the heat room air in recovered flue gas；Meanwhile the bag windband outside the body of heater of the coal-fired hot-air heating stove, the temperature in coal-char combustion area and flue gas burning-out zone can be effectively controlled, heated air can be also used for indoor heating, be recycled so as to reach air heating within doors.
Description
Technical field
The invention belongs to coal-fired combustion equipment field, is related to a kind of coal-fired hot-air heating stove and its heating method and purposes,
More particularly to the coal-fired hot-air heating stove and its heating method and purposes of a kind of energy-conserving and environment-protective.
Background technology
At present, the family of northern China certain areas, particularly small towns and country residentses, generally using native heating heating,
Due to the design of cooking stove, science, part coal are not unable to completely burned and discharged with cigarette, and utilization rate is low, not only coal consumption amount
Greatly, and serious pollution can be caused to air.Also, in real life, numerous rural subscribers are while heating, it is also desirable to
Stove can use simultaneously and cooking, such as heats up water, cooks and cooking.
At present, domestic stove mainly has two kinds of coal-fired forms on the market：
It is positive to burn stove (Fig. 1 (a))：It is i.e. traditional most simply and most common direct combustion mode, flame during solid fuel ignition
Propagated along heat smoke nature flow direction, combustion intensity is high, and firepower is prosperous, can meet user's cooking demand.The positive stove that burns is applied to nothing
The low fuel of the volatile matters such as bituminous coal.Although just burning stove with good cooking ability, using bituminous coal dispersion coal or using bituminous coal as
Made of raw material during moulded coal, heating of being heated after being added due to fire coal, Volatile, discharged immediately with flue gas, volatile matter is difficult to
After-flame, cause a large amount of black smokes (tar, CO, VOC, sulphur and nitrogen oxide etc.) and people's smell of choking to be emerged, seriously pollute environment.
Reverse burning furnace (Fig. 1 (b))：I.e. solid fuel ignition when flame backheating flue gas nature flow direction propagate burning side
Formula, there is the characteristics of delaying Volatile speed, furnace temperature is high, burning is abundant, black smoke can be substantially eliminated, suitable for bituminous coal etc.
The high fuel of volatile matter.Because counter combust more use more backhaul designs firepower is weaker, therefore its is unsuitable to improve after-flame degree
For cooking, it can only warm oneself, it is difficult to which by part, common people receive；Simultaneously because planning whole burner hearth is in oxygen-enriched high-temp combustion,
Discharged nitrous oxides concentration is higher.
For problem present in conventional oven, people work out the civil that can be applied to cooking and heating simultaneously
Stove-gasification furnace (such as CN 201212696Y and CN 201555250U), but have that stove combustion period is strong, load is not easy
Regulation, the defects of fire-sealing time is short and coal consumption is big.It can be brought rapidly up after coal, and volatile matter quickly separates out, and cause a large amount of
Sulphur and nitrogen oxides drastically separate out.
However, existing coal-burning stove for heating stove, is the Heating stove that fuel realizes smokeless combustion especially with bituminous coal, is
Heating furnace.There is no the northern area of central heating, especially samll cities and towns and rural area, this Household water heating stove application in China
It is very wide.Using this coal heating stove heat supply, it is necessary to which supporting a set of hot-water heating system, including backwater and hot water piping are connected to one group
Or multigroup radiator (being commonly called as " native heating "), realize the heat supply to heating space.But it is this using hot-water heating system, pipeline and
The cost and mounting cost of radiator are very high, and the heating thermal efficiency is relatively low；And to some buildings, building such as without central heating or
Tier building, it is larger using difficulty.
Also, because coal-fired cooking and heating furnace takes into account cooking and heating, it is desirable to which stove must assure that certain heat when designing
Load, it is too high in turn result in combustion zone temperature in stove, it is necessary to using water circulation to control body of heater material temperature；But in practical application
In, that a large amount of need to only provide comfortably is heated without cooking be present.In these cases, stove thermic load can enter one
Step reduces.Therefore, it is necessary to design a kind of only with the hot-blast stove that air is heat transfer medium.
The content of the invention
It is low for the heating thermal efficiency existing for existing coal-fired cooking hot-blast stove and the problem of cost is high, and most of combustion
Coal cooking hot-blast stove has only used the problem of heating in the application, and the invention provides a kind of coal hot-air of energy-conserving and environment-protective
Heating stove and its heating method and purposes.The present invention is reclaimed by setting heat-exchanger rig in the chimney of coal-fired hot-air heating stove
Heat room air in flue gas；Meanwhile the bag windband outside the body of heater of the coal-fired hot-air heating stove, can effectively it control
Coal-char combustion area processed and the temperature of flue gas burning-out zone, heated air can be also used for indoor heating, so as to reach within doors
Air heating recycles.
To use following technical scheme up to this purpose, the present invention：
In a first aspect, the invention provides a kind of coal-fired hot-air heating stove, the body of heater top of the coal-fired hot-air heating stove
Side is provided with chimney, and the lower section of the furnace interior chimney sets the first diaphragm plate, side and the body of heater chimney of the first diaphragm plate
The furnace wall of side connects, the opposite side of the first diaphragm plate perpendicular to the first diaphragm plate set first it is perpendicular every, the first vertical clapboard by stove
Internal body portion is segmented into the chamber of two connections, and the chamber positioned at chimney side is pyrolytic gasification area, and the chamber of opposite side is flue gas
Burning-out zone；Pyrolytic gasification area inclined downward sets fire grate, and primary air nozzle is set below the fire grate；The flue gas combustion
Overfiren air port is set to the greatest extent below area；The furnace wall of pyrolytic gasification area side is provided with coal filling hole；The pyrolytic gasification area and flue gas
It is coal-char combustion area below burning-out zone；Heat-exchanger rig is set in the chimney, air air-distribution device is set outside chimney, it is described to change
Thermal includes tube side and shell, and tube side leads in chimney the flue gas to circulate, and shell connects with air air-distribution device.
In the present invention, by setting heat-exchanger rig in chimney, the heat in recovered flue gas, by heat contained in flue gas
The air attracted by heat-exchanger rig with outside is exchanged heat, after the air that outside attracts absorbs the heat in flue gas, for room
Interior heating.
Currently preferred technical scheme is used as below, but not as the limitation of technical scheme provided by the invention, is passed through
Following technical scheme, it can preferably reach and realize the technical purpose and beneficial effect of the present invention.
As currently preferred technical scheme, the end of the fire grate opens up wind distributing hole；Stove i.e. of the present invention
Grate is designed using part open, and the top of fire grate is seamless design, and non-fuel provides support, and only end opens up wind distributing hole,
Reduce First air incoming air area, and then reduce the combustion volume in coal-char combustion area.
Preferably, the percent opening of the fire grate be 10%~50%, such as 10%, 15%, 20%, 25%, 30%,
35%th, 40%, 45% or 50% etc., it is not limited to cited numerical value, other interior unrequited numerical value of the number range
It is equally applicable.
As currently preferred technical scheme, windband, the wind are surrounded by outside the body of heater of the coal-fired hot-air heating stove
The air inlet of set connects with blower fan, and the air outlet of the windband connects with the air air-distribution device.
In the present invention, the bag windband outside the body of heater of the coal-fired hot-air heating stove, room air is introduced by blower fan
Windband, windband can absorb the heat of coal-char combustion area and flue gas burning-out zone, not only can effectively control coal-char combustion area with
And the temperature of flue gas burning-out zone, heated air can be also used for indoor heating, so as to reach the circulation profit of air heating within doors
With.
As currently preferred technical scheme, venturi conduit is vertically arranged in the flue gas burning-out zone.
Preferably, tertiary air orifice is set around trunnion at the trunnion of the venturi conduit.
Preferably, the number ＞ of the tertiary air orifice 1, such as 2,3,4,5 or 6 etc., but simultaneously not only limit
It is equally applicable in other unrequited numerical value in cited numerical value, the number range.
Preferably, the furnace wall of the flue gas burning-out zone side is provided with the after-flame air port connected with tertiary air orifice.
In the present invention, by setting Venturi tube, and tertiary air orifice is set at Venturi tube trunnion, forms tertiary air
Secondary burning-out zone, flue gas after-flame degree is greatly enhanced, realize under full working scope (coal, deslagging, cooking, heating and banking etc.) flue gas
Stable smokeless combustion.
As currently preferred technical scheme, longitudinally disposed volatile matter return duct, described in the pyrolytic gasification area
It is higher than coal filling hole at the top of volatile matter return duct, coal-char combustion area is stretched into bottom.
In the present invention, the setting of the volatile matter return duct, it can be will diffuse into by stack draught at the top of coal seam
Cigarette and volatile matter are drawn onto coal-char combustion area top, are then eliminated smoke by primary and secondary burning-out zone after-flame；Add so as to avoid opening
The phenomenon of falling cigarette during coal mouth.
Second aspect, the invention provides the heating method of above-mentioned coal-fired hot-air heating stove, methods described includes following step
Suddenly：
(a) fire coal is added in coal-fired hot-air heating stove by coal filling hole, fire coal enters pyrolytic gasification area and carries out pyrolysis gas
Change, produce tar, volatile matter and semicoke；
(b) tar, volatile matter and semicoke caused by step (a) flow downward into coal-char combustion area, are passed through with primary air nozzle
The air contact that fire grate introduces, tar, volatile matter, semicoke and air contact is set to burn；
(c) caused flue gas enters flue gas burning-out zone after step (b) volatile matter, semicoke and air contact burning, with
The air contact that overfiren air port introduces carries out an after-flame, the heat-exchanger rig that the flue gas in afterburnt enters in chimney, and from sky
The air of gas air-distribution device is discharged after being exchanged heat, and the air after heat exchange is used for indoor heating.
More specifically, when being vertically arranged venturi conduit in the flue gas burning-out zone, step (b) volatile matter,
Semicoke enters flue gas burning-out zone with caused flue gas after air contact burning, is carried out once with the air contact that overfiren air port introduces
After-flame, uncombusted flue gas enters venturi conduit and carries out secondary after-flame burning with the air contact that tertiary air orifice introduces, secondary
The heat-exchanger rig that the flue gas in afterburnt enters in chimney, is discharged after being exchanged heat with the air from air air-distribution device, is exchanged heat
Air afterwards is used for indoor heating.
As currently preferred technical scheme, described in step (a) and (d) it is coal-fired independently be bituminous coal, anthracite,
Any one in semi-coke or clean moulded coal or at least two combination, the combination is typical but non-limiting examples have：Bituminous coal and
The combination of the combination of anthracitic combination, anthracite and semi-coke, semi-coke and clean moulded coal, the combination of bituminous coal, anthracite and semi-coke,
Combination of anthracite, semi-coke and clean moulded coal etc., it is not limited to listed fire coal.
Preferably, the clean moulded coal is the clean moulded coal prepared by bituminous coal；
Preferably, the clean moulded coal is the clean moulded coal prepared by bituminous coal containing solid grey agent, sulphur-fixing agent and denitrfying agent
As currently preferred technical scheme, the ignition temperature in step (b) the coal-char combustion area is 850 DEG C~1000
DEG C, such as 850 DEG C, 870 DEG C, 900 DEG C, 950 DEG C or 1000 DEG C etc., it is not limited to cited numerical value, the number range
Other interior unrequited numerical value are equally applicable.
Preferably, the volume thermic load in step (b) the coal-char combustion area is 300kW/m3~800kW/m3, such as
300kW/m3、350kW/m3、400kW/m3、450kW/m3、500kW/m3、550kW/m3、600kW/m3、650kW/m3、700kW/
m3、750kW/m3Or 800kW/m3Deng it is not limited to cited numerical value, other interior unrequited numerical value of the number range
It is equally applicable；Area thermic load is 2kW/m2~8kW/m2, such as 2kW/m2、3kW/m2、4kW/m2、5kW/m2、6kW/m2、7kW/
m2Or 8kW/m2Deng it is not limited to cited numerical value, other unrequited numerical value are equally applicable in the number range.By
This, relative to traditional water jacket stove, coal-char combustion area volume thermic load and area thermic load are low, effectively reduce flue gas Circulation Area
The temperature in domain, furnace body temperature is kept to create condition to be covered using air.Additionally due to coal-char combustion area temperature reduces, it is effective
Nitrogen oxides is reduced, solid sulphur formed coal sulfur-fixing rate is improved and provides ecotopia.
Preferably, the flue gas Burn-out temperature of step (c) the flue gas burning-out zone be 600 DEG C~1000 DEG C, such as 600 DEG C,
650 DEG C, 700 DEG C, 750 DEG C, 800 DEG C, 850 DEG C, 900 DEG C, 950 DEG C or 1000 DEG C etc., it is not limited to cited numerical value,
Other unrequited numerical value are equally applicable in the number range.
As currently preferred technical scheme, in the combustion process in step (b) the coal-char combustion area and step
(c) in the flue gas burnout of the flue gas burning-out zone, room air is introduced into windband with blower fan, absorbing semicoke by windband fires
The heat of area and flue gas burning-out zone is burnt, absorbs the air air inlet air-distribution device of heat.
The third aspect, the invention provides the purposes of above-mentioned coal-fired hot-air heating stove, the coal-fired hot-air heating stove is used for
Civil heating field.
Compared with prior art, the invention has the advantages that：
(1) by setting heat-exchanger rig in the chimney of coal-fired hot-air heating stove, the heat in recovered flue gas adds the present invention
Hot room air；Meanwhile the bag windband outside the body of heater of the coal-fired hot-air heating stove, can effectively control coal-char combustion area with
And the temperature of flue gas burning-out zone, make the temperature control in coal-char combustion area at 850 DEG C~1000 DEG C, the temperature control in smoke combustion area
At 600 DEG C~1000 DEG C；Heated air can be also used for indoor heating, be recycled so as to reach air heating within doors,
And then the efficiency of cooking hot-blast stove is greatly improved, the thermal efficiency may be up to more than 80%；
(2) heretofore described fire grate is designed using part open, can reduce First air incoming air area, and then reduce
The combustion volume in coal-char combustion area, reduce the body of heater size in coal-char combustion area；Also, the coal-fired hot-air heating stove is installed and made
With convenient, heating level of comfort height.
Brief description of the drawings
Fig. 1 (a) is traditional positive burning stove burning schematic diagram；
Fig. 1 (b) is traditional reverse burning furnace burning schematic diagram；
Fig. 2 is the structural representation of coal-fired hot-air heating stove described in the embodiment of the present invention 1；
Fig. 3 is the structural representation of heat-exchanger rig described in the embodiment of the present invention 1；
Fig. 4 is the structural representation of coal-fired hot-air heating stove described in the embodiment of the present invention 2；
Wherein, 1- chimneys, the diaphragm plates of 2- first, the vertical clapboards of 3- first, 4- fire grates, 5- primary air nozzles, 6- overfiren air ports,
7- coal filling holes, 8- heaters, 9- air air-distribution devices, 10- windbands, 11- blower fans, 12- venturi conduits, 13- tertiary air orifices,
14- after-flames air port, 15- volatile matter return ducts.
Embodiment
For the present invention is better described, technical scheme is readily appreciated, below to the present invention further specifically
It is bright.But following embodiments is only the simple example of the present invention, the scope of the present invention is not represented or limits, this
Invention protection domain is defined by claims.
Specific embodiment of the invention mode part provides a kind of coal-fired hot-air heating stove and its heating method, the fire coal
The body of heater top side of hot-blast stove is provided with chimney 1, and the lower section of the furnace interior chimney 1 sets the first diaphragm plate 2, and first
The side of diaphragm plate 2 connects with the furnace wall of the side of body of heater chimney 1, and the opposite side of the first diaphragm plate 2 is set perpendicular to the first diaphragm plate 2
The first vertical clapboard 3 is put, furnace interior is divided into the chamber of two connections by the first vertical clapboard 3, and the chamber positioned at the side of chimney 1 is
Pyrolytic gasification area, the chamber of opposite side is flue gas burning-out zone；Pyrolytic gasification area inclined downward sets fire grate 4, the stove
The lower section of grate 4 sets primary air nozzle 5；Overfiren air port 6 is set below the flue gas burning-out zone；The furnace wall of pyrolytic gasification area side
It is provided with coal filling hole 7；It is coal-char combustion area below the pyrolytic gasification area and flue gas burning-out zone；Heat exchange is set in the chimney 1
Device 8, the outside of chimney 1 set air air-distribution device 9, and the heat-exchanger rig 8 includes tube side and shell, and tube side, which leads in chimney 1, to flow
Logical flue gas, shell connect with air air-distribution device 9.
The heating method comprises the following steps：
(a) fire coal is added in coal-fired hot-air heating stove by coal filling hole 7, fire coal enters pyrolytic gasification area and carries out pyrolysis gas
Change, produce tar, volatile matter and semicoke；
(b) tar, volatile matter and semicoke caused by step (a) flow downward into coal-char combustion area, are passed through with primary air nozzle 5
The air contact that fire grate 4 introduces, tar, volatile matter, semicoke and air contact is set to burn；
(c) caused flue gas enters flue gas burning-out zone after step (b) volatile matter, semicoke and air contact burning, with
The air contact that overfiren air port 6 introduces carries out an after-flame, the heat-exchanger rig 8 that the flue gas in afterburnt enters in chimney 1, with from
The air of air air-distribution device 9 is discharged after being exchanged heat, and the air after heat exchange is used for indoor heating.
It is below present invention typical case but non-limiting example：
Embodiment 1：
A kind of coal-fired hot-air heating stove and its heating method are present embodiments provided, as shown in Fig. 2 the coal fuel heating elegance
The body of heater top side of radiator is provided with chimney 1, and the lower section of the furnace interior chimney 1 sets the first diaphragm plate 2, the first diaphragm plate
2 side connects with the furnace wall of the side of body of heater chimney 1, and the opposite side of the first diaphragm plate 2 sets first perpendicular to the first diaphragm plate 2
Furnace interior is divided into the chamber of two connections by vertical clapboard 3, the first vertical clapboard 3, and the chamber positioned at the side of chimney 1 is pyrolysis gas
Change area, the chamber of opposite side is flue gas burning-out zone；Pyrolytic gasification area inclined downward sets fire grate 4, under the fire grate 4
Side sets primary air nozzle 5；Overfiren air port 6 is set below the flue gas burning-out zone；The furnace wall of pyrolytic gasification area side is provided with
Coal filling hole 7；It is coal-char combustion area below the pyrolytic gasification area and flue gas burning-out zone；As shown in figure 3, set in the chimney 1
Heat-exchanger rig 8, the outside of chimney 1 is set and air air-distribution device 9, the heat-exchanger rig 8 include tube side and shell, and tube side leads to chimney
The flue gas to be circulated in 1, shell connect with air air-distribution device 9.
Wherein, the end of the fire grate 4 opens up wind distributing hole；The percent opening of fire grate 4 is 30%.
Windband 10 is surrounded by outside the body of heater of the coal-fired hot-air heating stove, air inlet and the blower fan 11 of the windband 10 connect
Logical, the air outlet of the windband 10 connects with the air air-distribution device 9.
The heating method comprises the following steps：
(a) will be added by clean moulded coal prepared by bituminous coal by coal filling hole 7 in coal-fired hot-air heating stove, fire coal enters pyrolysis
Gasification zone carries out pyrolytic gasification, produces tar, volatile matter and semicoke；
(b) tar, volatile matter and semicoke caused by step (a) flow downward into coal-char combustion area, are passed through with primary air nozzle 5
The air contact that fire grate 4 introduces, tar, volatile matter, semicoke and air contact is set to burn；
(c) caused flue gas enters flue gas burning-out zone after step (b) volatile matter, semicoke and air contact burning, with
The air contact that overfiren air port 6 introduces carries out an after-flame, the heat-exchanger rig 8 that the flue gas in afterburnt enters in chimney 1, with from
The air of air air-distribution device 9 is discharged after being exchanged heat, and the air after heat exchange directly carries out heat supply to room, realizes adopting for house
It is warm；
Wherein, in the combustion process in step (b) the coal-char combustion area and step (c) the flue gas burning-out zone flue gas
In burnout, room air is introduced into windband 10 with blower fan 11, coal-char combustion area and flue gas burning-out zone are absorbed by windband 10
Heat, absorb the air air inlet air-distribution device 9 of heat.
In the present embodiment, the ignition temperature in step (b) the coal-char combustion area is 1000 DEG C；The volume heat in coal-char combustion area
Load is 460kW/m3, area thermic load is 3.5kW/m2；The flue gas Burn-out temperature of step (c) the flue gas burning-out zone is 800
℃；The thermal efficiency of cooking hot-blast stove is about 78%.
Embodiment 2：
A kind of coal-fired hot-air heating stove and its heating method are present embodiments provided, as shown in figure 4, the coal fuel heating elegance
The body of heater top side of radiator is provided with chimney 1, and the lower section of the furnace interior chimney 1 sets the first diaphragm plate 2, the first diaphragm plate
2 side connects with the furnace wall of the side of body of heater chimney 1, and the opposite side of the first diaphragm plate 2 sets first perpendicular to the first diaphragm plate 2
Furnace interior is divided into the chamber of two connections by vertical clapboard 3, the first vertical clapboard 3, and the chamber positioned at the side of chimney 1 is pyrolysis gas
Change area, the chamber of opposite side is flue gas burning-out zone；Pyrolytic gasification area inclined downward sets fire grate 4, under the fire grate 4
Side sets primary air nozzle 5；Overfiren air port 6 is set below the flue gas burning-out zone；The furnace wall of pyrolytic gasification area side is provided with
Coal filling hole 7；It is coal-char combustion area below the pyrolytic gasification area and flue gas burning-out zone；As shown in figure 3, set in the chimney 1
Heat-exchanger rig 8, the outside of chimney 1 is set and air air-distribution device 9, the heat-exchanger rig 8 include tube side and shell, and tube side leads to chimney
The flue gas to be circulated in 1, shell connect with air air-distribution device 9.
Wherein, the end of the fire grate 4 opens up wind distributing hole；The percent opening of fire grate 4 is 15%.
Windband 10 is surrounded by outside the body of heater of the coal-fired hot-air heating stove, air inlet and the blower fan 11 of the windband 10 connect
Logical, the air outlet of the windband 10 connects with the air air-distribution device 9.
Venturi conduit 12 is vertically arranged in the flue gas burning-out zone, is set at the trunnion of venturi conduit 12 around trunnion
Tertiary air orifice 13, the number of tertiary air orifice 13 is 4；The furnace wall of the flue gas burning-out zone side is provided with to be connected with tertiary air orifice 13
Logical after-flame air port 14.
Longitudinally disposed volatile matter return duct 15 in the pyrolytic gasification area, the top of volatile matter return duct 15 are higher than
Coal-char combustion area is stretched into coal filling hole 7, bottom.
The heating method comprises the following steps：
(a) will be added by clean moulded coal prepared by bituminous coal by coal filling hole 7 in coal-fired hot-air heating stove, fire coal enters pyrolysis
Gasification zone carries out pyrolytic gasification, produces tar, volatile matter and semicoke；
(b) tar, volatile matter and semicoke caused by step (a) flow downward into coal-char combustion area, are passed through with primary air nozzle 5
The air contact that fire grate 4 introduces, tar, volatile matter, semicoke and air contact is set to burn；
(c) caused flue gas enters flue gas burning-out zone after step (b) volatile matter, semicoke and air contact burning, with
The air contact that overfiren air port 6 introduces carries out an after-flame, and uncombusted flue gas enters venturi conduit and introduced with tertiary air orifice
Air contact carry out secondary after-flame burning, the heat-exchanger rig 8 that the flue gas in secondary afterburnt enters in chimney 1, and from air
The air of air-distribution device 9 is discharged after being exchanged heat, and the air after heat exchange directly carries out heat supply to room, realizes the heating in house；
Wherein, in the combustion process in step (b) the coal-char combustion area and step (c) the flue gas burning-out zone flue gas
In burnout, room air is introduced into windband 10 with blower fan 11, coal-char combustion area and flue gas burning-out zone are absorbed by windband 10
Heat, absorb the air air inlet air-distribution device 9 of heat.
In the present embodiment, the ignition temperature in step (b) the coal-char combustion area is 850 DEG C；The volume heat in coal-char combustion area
Load is 320kW/m3, area thermic load is 2.4kW/m2；The flue gas Burn-out temperature of step (c) the flue gas burning-out zone is 700
℃；The thermal efficiency of cooking hot-blast stove is about 81%.
Embodiment 3：
Present embodiments provide a kind of coal-fired hot-air heating stove and its heating method, the structure of the coal-fired hot-air heating stove
With reference to the structure of coal-fired hot-air heating stove in embodiment 2, difference is：The number of the tertiary air orifice 13 is 2.
The heating method is with reference to the method in embodiment 2, difference：Fire coal used is to contain solid grey agent, sulphur-fixing agent
With the clean moulded coal prepared by bituminous coal of denitrfying agent.
In the present embodiment, the ignition temperature in step (b) the coal-char combustion area is 900 DEG C；The volume heat in coal-char combustion area
Load is 330kW/m3, area thermic load is 2.5kW/m2；The flue gas Burn-out temperature of step (c) the flue gas burning-out zone is 800
℃；The thermal efficiency of cooking hot-blast stove is about 80%.
Embodiment 4：
Present embodiments provide a kind of coal-fired hot-air heating stove and its heating method, the structure of the coal-fired hot-air heating stove
With reference to the structure of coal-fired hot-air heating stove in embodiment 2.
The heating method is with reference to the method in embodiment 2, difference：Fire coal used is anthracite.
In the present embodiment, the ignition temperature in step (b) the coal-char combustion area is 950 DEG C；The volume heat in coal-char combustion area
Load is 350kW/m3, area thermic load is 2.3kW/m2；The flue gas Burn-out temperature of step (c) the flue gas burning-out zone is 850
℃；The thermal efficiency of cooking hot-blast stove is about 79%.
Comparative example 1：
This comparative example provides a kind of coal-fired hot-air heating stove, the structure of the coal-fired hot-air heating stove with reference to embodiment 1,
Difference is：Heat-exchanger rig 8 is not provided with the chimney 1, and heating water pipeline is set in chimney 1, directly utilizes flue gas
Water in heating water pipeline, heating is connected to radiator to give room heat supply with water pipeline.
In this comparative example, the ignition temperature in the coal-char combustion area is 1200 DEG C；The volume thermic load in coal-char combustion area is
2000kW/m3, area thermic load is 300kW/m2；The flue gas Burn-out temperature of flue gas burning-out zone described in step is 1000 DEG C；Cooking heat
The thermal efficiency of elegance radiator about 72%.
Summary embodiment and comparative example can be seen that the present invention by being set in the chimney of coal-fired hot-air heating stove
Heat-exchanger rig, the heat room air in recovered flue gas；Meanwhile the bag wind outside the body of heater of the coal-fired hot-air heating stove
Set, can effectively control the temperature in coal-char combustion area and flue gas burning-out zone, make the temperature control in coal-char combustion area 850 DEG C~
1000 DEG C, the temperature control in smoke combustion area is at 600 DEG C~1000 DEG C；Heated air can be also used for indoor heating, from
And reach air heating within doors and recycle, and then the efficiency of cooking hot-blast stove is greatly improved, the thermal efficiency may be up to
More than 80%.
Heretofore described fire grate is designed using part open, can reduce First air incoming air area, and then reduce half
The combustion volume of burnt combustion zone, reduce the body of heater size in coal-char combustion area；Also, the coal-fired hot-air heating stove installation and use
Convenient, heating level of comfort is high.
Applicant states that the present invention illustrates the detailed process equipment of the present invention and technological process by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, it is above-mentioned detailed not mean that the present invention has to rely on
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, selection of concrete mode etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of coal-fired hot-air heating stove, it is characterised in that the body of heater top side of the coal-fired hot-air heating stove is provided with chimney
(1), the lower section of the furnace interior chimney (1) sets the first diaphragm plate (2), side and the body of heater chimney of the first diaphragm plate (2)
(1) furnace wall of side connects, and the opposite side of the first diaphragm plate (2) sets the first vertical clapboard (3) perpendicular to the first diaphragm plate (2),
Furnace interior is divided into the chamber of two connections by the first vertical clapboard (3), and the chamber positioned at chimney (1) side is pyrolytic gasification
Area, the chamber of opposite side is flue gas burning-out zone；Pyrolytic gasification area inclined downward sets fire grate (4), the fire grate (4)
Lower section sets primary air nozzle (5)；Overfiren air port (6) is set below the flue gas burning-out zone；The furnace wall of pyrolytic gasification area side
It is provided with coal filling hole (7)；It is coal-char combustion area below the pyrolytic gasification area and flue gas burning-out zone；Set in the chimney (1)
Heat-exchanger rig (8), chimney (1) is outside to set air air-distribution device (9), and the heat-exchanger rig (8) includes tube side and shell, tube side
The flue gas of circulation, shell connect with air air-distribution device (9) in logical chimney (1).
2. coal-fired hot-air heating stove according to claim 1, it is characterised in that the end of the fire grate (4) opens up cloth
Air holes；
Preferably, the percent opening of the fire grate (4) is 10%~50%.
3. coal-fired hot-air heating stove according to claim 1 or 2, it is characterised in that the stove of the coal-fired hot-air heating stove
Windband (10) is surrounded by outside body, the air inlet of the windband (10) connects with blower fan (11), the air outlet of the windband (10) with
Air air-distribution device (9) connection.
4. according to the coal-fired hot-air heating stove described in claim any one of 1-3, it is characterised in that erected in the flue gas burning-out zone
It is straight that venturi conduit (12) is set；
Preferably, tertiary air orifice (13) is set around trunnion at the trunnion of the venturi conduit (12)；
Preferably, the number ＞ 1 of the tertiary air orifice (13)；
Preferably, the furnace wall of the flue gas burning-out zone side is provided with the after-flame air port (14) connected with tertiary air orifice (13).
5. according to the coal-fired hot-air heating stove described in claim any one of 1-4, it is characterised in that indulged in the pyrolytic gasification area
To volatile matter return duct (15) is set, it is higher than coal filling hole (7) at the top of the volatile matter return duct (15), semicoke is stretched into bottom
Combustion zone.
A kind of 6. heating method of coal-fired hot-air heating stove as described in claim any one of 1-5, it is characterised in that the side
Method comprises the following steps：
(a) fire coal is added in coal-fired hot-air heating stove by coal filling hole (7), fire coal enters pyrolytic gasification area and carries out pyrolysis gas
Change, produce tar, volatile matter and semicoke；
(b) tar, volatile matter and semicoke caused by step (a) flow downward into coal-char combustion area, with primary air nozzle (5) through stove
The air contact that grate (4) introduces, tar, volatile matter, semicoke and air contact is set to burn；
(c) caused flue gas enters flue gas burning-out zone after step (b) volatile matter, semicoke and air contact burning, and secondary
The air contact that air port (6) introduces carries out an after-flame, and the flue gas in afterburnt is into the heat-exchanger rig (8) in chimney (1), with coming
Discharged after being exchanged heat from the air of air air-distribution device (9), the air after heat exchange is used for indoor heating.
7. heating method according to claim 6, it is characterised in that step (a) independently is with coal-fired described in (d)
Any one in bituminous coal, anthracite, semi-coke or clean moulded coal or at least two combination；
Preferably, the clean moulded coal is the clean moulded coal prepared by bituminous coal；
Preferably, the clean moulded coal is the clean moulded coal prepared by bituminous coal containing solid grey agent, sulphur-fixing agent and denitrfying agent.
8. the heating method according to claim 6 or 7, it is characterised in that the burning temperature in step (b) the coal-char combustion area
Spend for 850 DEG C~1000 DEG C；
Preferably, the volume thermic load in step (b) the coal-char combustion area is 300kW/m3~800kW/m3, area thermic load is
2kW/m2~8kW/m2；
Preferably, the flue gas Burn-out temperature of step (c) the flue gas burning-out zone is 600 DEG C~1000 DEG C.
9. according to the heating method described in claim any one of 6-8, it is characterised in that in step (b) the coal-char combustion area
Combustion process in and the flue gas burnout of step (c) the flue gas burning-out zone in, room air is drawn with blower fan (11)
Enter windband (10), the heat of coal-char combustion area and flue gas burning-out zone is absorbed by windband (10), the air for absorbing heat enters
Air air-distribution device (9).
A kind of 10. purposes of coal-fired hot-air heating stove as described in claim any one of 1-5, it is characterised in that the fire coal
Hot-blast stove is used for civil heating field.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710823657.1A CN107435953A (en) | 2017-09-13 | 2017-09-13 | The coal-fired hot-air heating stove and its heating method and purposes of a kind of energy-conserving and environment-protective |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710823657.1A CN107435953A (en) | 2017-09-13 | 2017-09-13 | The coal-fired hot-air heating stove and its heating method and purposes of a kind of energy-conserving and environment-protective |
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| CN107435953A true CN107435953A (en) | 2017-12-05 |
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| CN201710823657.1A Pending CN107435953A (en) | 2017-09-13 | 2017-09-13 | The coal-fired hot-air heating stove and its heating method and purposes of a kind of energy-conserving and environment-protective |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686276A (en) * | 2019-10-31 | 2020-01-14 | 兖矿集团有限公司 | Graded combustion normal-pressure hot water stove and using method thereof |
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| WO1999036731A1 (en) * | 1998-01-13 | 1999-07-22 | Puulämpö Suomi Oy | A furnace structure, a method for burning wood as well as a method for retrieving combustion heat |
| RU2186299C2 (en) * | 2000-05-15 | 2002-07-27 | Коммандитное товарищество "Черноиванов и Ко Таганрогский механический завод" | Heating stove |
| CN102121711A (en) * | 2011-04-01 | 2011-07-13 | 山西正和机械制造有限公司 | Foldback type flue smoke dust purification energy-saving cooking and warming dual-purpose furnace |
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| CN2166330Y (en) * | 1993-04-29 | 1994-05-25 | 陆宝臣 | Coal, firewood two-purpose energy-saving warming air stove |
| WO1999036731A1 (en) * | 1998-01-13 | 1999-07-22 | Puulämpö Suomi Oy | A furnace structure, a method for burning wood as well as a method for retrieving combustion heat |
| RU2186299C2 (en) * | 2000-05-15 | 2002-07-27 | Коммандитное товарищество "Черноиванов и Ко Таганрогский механический завод" | Heating stove |
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| CN110686276A (en) * | 2019-10-31 | 2020-01-14 | 兖矿集团有限公司 | Graded combustion normal-pressure hot water stove and using method thereof |
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