CN1122441A - Briquet combusting reverberate furnace - Google Patents
Briquet combusting reverberate furnace Download PDFInfo
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- CN1122441A CN1122441A CN 94104552 CN94104552A CN1122441A CN 1122441 A CN1122441 A CN 1122441A CN 94104552 CN94104552 CN 94104552 CN 94104552 A CN94104552 A CN 94104552A CN 1122441 A CN1122441 A CN 1122441A
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- combustion chamber
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Abstract
The said furnace includes furnace body and combustor, which is formed by the wall and is suitable for combusting briquet. At the top of the combustor, there is a curved refractory heat-collecting arched crown supported by the combustor wall with a high-temp fume outlet being at the center of arched crown. The combustor has a briquet holder inside it and a door for briquet holder. The heat-collecting arched crown aims at prolonging the retention period of fume so as to raise the temp. of outlet fume.
Description
The present invention relates to a kind of Industrial Stoves, relate in particular to a kind of combustion chamber that is used for the low quality coal that can burn on the Industrial Stoves.
What present existing and widely used Industrial Stoves, their maximum operating temperature had will be more than 1350 ℃, and therefore, its combustion chamber only is suitable for the above bituminous coal of burning 5000 kilocalorie/kilograms,, the following coal of 4000 kilocalorie/kilograms can not burn.Its reason because the calorific value of colm is low, is difficult to meet the requirements of operating temperature on the one hand, on the other hand, and combustion chamber locust version and combustion system incompatibility burning inferior coal.Because the excessive height of the arch of existing combustion chamber, angle of radiation is not good, and firepower do not concentrate, and the temperature when making burning inferior coal in the stove is low, and it is not prosperous burn, the boiler slag carbon content height, and burning is difficult when causing the Industrial Stoves burning inferior coal, the thermal efficiency is low.
China utility model patent No89211692.7 discloses a kind of combustion chamber of grate firing type, and this combustion chamber is made up of vault, fire grate and airduct.Because vault is parabola shaped vertically.Be shaped form laterally, can play and prolong the interior temperature of retention time stove that combustion gas deposits in the combustion chamber and can obtain suitable raising, solved some problems of grate furnace.But because it is the normal burning grate furnace, burning be raw coal, still have incomplete combustion, still do not reach problems such as the condition of high temperature in row's black smoke and the stove.
And Chinese invention patent No90105764.9 discloses a kind of burner of briquet.This moulded coal burner is because of briquet, so ratio of combustion is more complete, and thermal efficiency height is little to the pollution of environment.Yet, the coal-adding type of this burner is to utilize propeller that moulded coal is pushed in the burner, moulded coal cracky and the often cleaning that may result in blockage, in addition in the frequent burner of coal filling hole, moulded coal cracky and the often cleaning that may result in blockage, the frequent unlatching of coal filling hole is difficult for grasping intake in addition, also just can not regulate the temperature in the stove freely, burner needs water-cooled, will take away heat, make to be difficult in the stove reach a high temperature, because every lump coal all contacts with the water-cooled metal tube wall, the coal of contact site easily causes local underburnt phenomenon again.Though, also disclose a kind of burner of carrying by fire grate of briquet, because this burner can't make the state that reaches a high temperature in the stove, still can not be used for the higher kiln of operating temperature.
The object of the present invention is to provide burn moulded coal, sufficient combustion, pollution-free and can make temperature in the kiln reach the kiln of the combustion chamber of desired high temperature a kind of having.Because this kiln has had a kind of like this combustion chamber, therefore, it can overcome the defective that exists in the existing kiln.
The objective of the invention is to realize by following technical scheme.Be that kiln of the present invention comprises body of heater and combustion chamber, wherein the combustion chamber is surrounded by chamber wall, this combustion chamber is suitable for briquet, it is characterized in that having one vertically and/or laterally to be fire-resistant heat build-up vault curved and that support by chamber wall at the top of combustion chamber, the interposition of this vault is equipped with high-temperature flue gas outlet, one a moulded coal frame and a combustion chamber door for the discrepancy of moulded coal frame in order to the stacking moulded coal arranged in the combustion chamber.The purpose of this heat build-up vault is the time of staying of prolong smoke, improves the outlet temperature of flue gas.
The exhanst gas outlet that is preferably on the vault selects to be similar to oval-shaped hole, and the longitudinal length (can claim major axis) of the exhanst gas outlet on the preferred vault is the 1/3--3/5 of vault length, and its lateral length (can claim minor axis) is the 1/3--3/5 of vault lateral length.
For fuel gas is burnt as much as possible, side wall of combustion chamber is provided with secondary air duct, the air inlet of secondary air duct is positioned at the lower position of moulded coal frame bottom, and the secondary air duct exit position should be higher than on the moulded coal frame the moulded coal height of close chamber wall, and outlet up or oblique setting.Be more preferably and also be provided with the tertiary air road on chamber wall, the air inlet in tertiary air road is positioned at the below of moulded coal frame bottom, and the tertiary air road extends to the chamber wall top face always, and the outlet of tertiary air road is positioned at the outside of vault.
For the moulded coal of each position of making the moulded coal frame reaches even burning basically, the bottom of combustion chamber has been designed cap shape projection.Like this, can guarantee basically that primary air evenly flows through each air channel that is formed by the pre-manufactured hole on the moulded coal, does not burn it partially.
Being preferably the moulded coal frame is a car, and sets up guide rail in the bottom, combustion chamber, is convenient to like this propelling of moulded coal car is pulled out, and reduces labor intensity of operating personnel.
In order more clearly now to separate the present invention, a specific embodiment of the present invention is done more detailed description below in conjunction with accompanying drawing:
Fig. 1 (a), (b) and (c) plane that concerns of several different structures of the combustion chamber of expression kiln of the present invention and body of heater;
Fig. 2 represents the structure of the combustion chamber of kiln of the present invention;
Fig. 2 (b) is the cutaway view of B-B line among Fig. 2 (a);
Fig. 3 (a) is (b) with the front view of (c) representing the heat build-up vault respectively, mansion view and side view;
Fig. 4 (a) and (b) be the front view and the mansion view of moulded coal car;
Fig. 5 is the guide rail of a kind of portable fire door of expression;
Fig. 6 is the cutaway view of the combustion chamber of bottom ventilation;
Fig. 7 has schematically shown a kind of door structure.
With reference now to Fig. 1 (a),, (b) and (c), among Fig. 1, label 1 is represented the combustion chamber.And kiln can be circular, and is square with rectangular.Combustion chamber 1 can fully be in the kiln, or on the kiln body, or fully in the external side of kiln, specifically how to transform and arrange by concrete condition and decide.
Fig. 2 has represented combustion chamber of the present invention.This combustion chamber is surrounded by three walls and moulded coal car inlet fire door 2.Three walls are to be built into refractory material.Fire door 2 also is inlaid with refractory material towards interior one side.Fire door 2 can be multiple mode, as the simple gate hinge type, two-door opposite opened, upper-turn-type, on move formula and transverse type.For different door structures, should dispose corresponding parts.As moving door, can be arranged to structure shown in Figure 7, at door the pulley (not shown) is housed respectively up and down, and correspondingly in body of heater upper-lower position configuration pulley guide rails, guide rail has a segmental arc in the both sides of corresponding gate-width, reaches the better seal state so that door shown in Figure 7 can be embedded in the inlet of moulded coal car.Below fire door 2, be provided with shutter 4 substantially in the centre position, open air door 4, in the combustion chamber, form negative pressure because the high-temperature gas in the combustion chamber rises, suck air supply-type coal combustion by air door 4.The aperture of damper 4 just can correspondingly be regulated air inflow, and is single between control very.
Air flow into the bottom 15 of moulded coal car 8 after entering from air door 4, and enters in the hole prefabricated on the moulded coal, along rising on the duct that the pre-manufactured hole of moulded coal forms, makes the moulded coal burning.Be called wind one time along the air-flow that rises on the duct prefabricated on the moulded coal.Only supply wind one time, also contain the fuel gas of a great deal of in the combustion gas.In order to burn these fuel gas, on at least one wall of combustion chamber, be provided with secondary air duct 19 (see figure 6)s, the inlet 17 of secondary air duct 19 is positioned at the below of the bottom 15 of moulded coal car 8, and the outlet 21 of secondary air duct 19 is higher than the moulded coal height of close chamber wall on the moulded coal car 8, and this outlet 21 is provided with up or obliquely.In general, this goes out open height and should design by the height of possible maximum coal capacities.In a word, moulded coal can not block this secondary wind outlet 21, otherwise will influence efficiency of combustion.Be not that secondary air duct 19 must be located in the chamber wall.Another feasible method is the gap of more accurately designing between the wall of tapered outer surface that moulded coal forms and combustion chamber 1, makes this gap play the effect of secondary air duct 19.Perhaps, the tapered outer surface of outermost moulded coal is made flute profile, by these grooves as secondary air duct 19.On the contrary, also can make the shape that there is groove on the surface to the refractory brick that faces moulded coal, also can form secondary air duct 19.
Even considering provides secondary wind, still have the part fuel gas in the combustion gas and do not burnt, therefore, also be provided with tertiary air road 20.The inlet 18 in tertiary air road 20 also is positioned at the below of the bottom 15 of moulded coal car 8.And its outlet is 22 different with the outlet 21 of secondary air duct 19, is that it is good highly being chosen in 20--60cm in the outside that is higher than the vault above the combustion wall end face one.Respectively there is adjusting device in secondary air duct 19 and tertiary air road 20, regulate secondary air flow and tertiary air quantity.Adopt known adjusting device to get final product.
For the moulded coal everywhere that can make the moulded coal car evenly burns, just must make the primary air flow that flows through in the prefabricated duct of moulded coal basic identical, therefore, the bottom surface of combustion chamber 1 is not to be a plane, and formed a projection 16 that is similar to the cap shape, regulate the flow resistance of air by this cap shape projection 16, thereby reach the uniformity of a desired wind.
Referring now to Fig. 3 (a),, (b) and (c), they represent the front view of combustion chamber heat-gathering vault 6 respectively, mansion view and side view.Can find from figure that the vertical of vault 6 is shaped form, and it laterally also is a shaped form.She Ji purpose is the retention time for prolong smoke like this, reaches the purpose that high furnace temperature is provided, and fuel gas is burnt.There is a high-temperature flue gas flow export 7 at the place in the vault centre position, the shape of this flow export 7 is similar to ellipse, the major axis R ' of outlet 7 is preferably the 1/3--3/6 into vault longitudinal length R, be the R of R '=(1/3--3/5), and the minor axis r ' of this outlet is preferably the 1/3--3/5 into vault transverse width r, be r ,=(1/3--3/5) r.Vault 6 is made by refractory, and preferably vault is mixed and made into by alumina cement and aggregate.Vault 6 is to cover on the wall of combustion chamber 1, promptly supports this vault 6 by chamber wall.Fig. 4 (a) and (b) represented the front view and the mansion view of moulded coal car.The moulded coal car has crosspiece limit 13 and vertical shelves limit 14, roller 9, strap 12 and cross rib 11.Strap 12 is used to hold moulded coal, and cross rib 11 is used to increase the intensity of stay 12.Fig. 4 is schematic figure, also can design the moulded coal car 8 of other shape as requested, and this is not difficult concerning a those of ordinary skill.
Fig. 5 is the enlarged drawing of air door 4.Air door 4 is a plate, is installed on the fire door with hinge or other suitable manner.Air door can be adjusted on any position.If desired, can also offer the air inlet (not shown), especially, can drive gas port in the bottom of two side, and add air door in (b) and the situation (c) of Fig. 1 in the bottom of chamber wall.
Install material base in kiln after, open the combustion chamber door, moulded coal car 8 is pushed in the combustion chamber along guide rail 5, set off igniting piece (known) on moulded coal top with open firing point, the moulded coal that ignites (is disclosed in 90105094.6), can make the interior temperature of stove reach requirement after a period of time.Because the present invention's burning is moulded coal, and the structure of combustion chamber has been done corresponding improvement, can reach following effect:
1. can improve significantly the thermal efficiency, save a large amount of burnings.
2. can burning low grade coal, thus production cost reduced.
3. sufficient combustion, essentially no black smoke produces, and has reduced the pollution to environment, and can be not Build chimney stack, beautified environment.
4. even burning low grade coal also can make and reach desired high temperature in the stove, thereby makes finished product Rate improves.
5. reduced workman's labour intensity, the workman only needs the moulded coal code on the moulded coal car and push away Enter in the combustion chamber to get final product.
The contrast table of a moulded coal upper burning type and scatter fire of raw coal formula below
Table 1
| Classification of the items | Scatter fire of raw coal | Fire on the moulded coal |
| The combustion space | 3900×1600mm | 3000×1400mm |
| Combustion system | Hand burns (fat coal) | Automatic or semi-automatic burns |
| Advance the coal mode | 1 time/30 minutes-1 time/5 minutes | Changed once in 24 hours |
| Coal consumption | 1 stove/16 ton | 1 stove/7 ton |
| Furnace temperature | 1000℃ | 1300℃ |
| Flame height | 1m | 2m |
| Chimney | 30m | 3m |
| Boiler slag carbon content | 50％ | 5％ |
| Oke exhaust blackness | More than 3 grades (Lin Geman) | (Lin Geman) below 1 grade |
| Environment | Pollute | Pollution-free |
| Labour intensity | 10 people | 2 people |
Claims (9)
1. the counter-burning type kiln of a briquet, this kiln comprises body of heater and combustion chamber (1), wherein combustion chamber (1) is surrounded by chamber wall, this combustion chamber (1) is suitable for briquet, the top that it is characterized in that in the combustion chamber (1) has one vertically and/or laterally to be fire-resistant heat build-up vault (6) curved and that supported by chamber wall, the interposition of this vault (6) is equipped with high-temperature flue gas outlet (7), one a moulded coal frame (8) and a combustion chamber door (4) for the discrepancy of moulded coal frame in order to the stacking moulded coal arranged in the combustion chamber (1).The purpose of this heat build-up vault (6) is the time of staying of prolong smoke, improves the outlet temperature of flue gas.
2. counter-burning type kiln according to claim 1, it is characterized in that heat build-up vault (6) centre position place high-temperature flue gas outlet (7) shape approximation in or oval, the length R ' of its major axis is (1/3--3/5) of vault longitudinal length R, the width r ' of its minor axis is vault transverse width r (1/3-3/5), moulded coal frame (8) is the moulded coal car of band roller (9), and the guide rail that moves thereon for the moulded coal car is set inside and outside the combustion chamber.
3. counter-burning type kiln according to claim 1 and 2, it is characterized in that being provided with at least one chamber wall secondary air duct (19), the inlet of secondary air duct (17) is positioned at the below of the bottom 15 of moulded coal car (8), its outlet (21) is higher than the height of the moulded coal that stacks near chamber wall, moulded coal can not block this outlet (21), this outlet (21) is provided with up or obliquely, and combustion chamber (1) also comprises the secondary air flow adjusting device.
4. counter-burning type kiln according to claim 1 and 2, it is characterized in that also being provided with in the chamber wall tertiary air road (20), the inlet (18) in tertiary air road (20) is positioned at the below of moulded coal car (8) bottom 15, the outlet (22) in tertiary air road (20) is positioned at the position of top, chamber wall top, be in the outside of vault (6), this outlet (18) is provided with up or obliquely, and combustion chamber (1) also has a tertiary air quantity adjusting device.
5. counter-burning type kiln according to claim 3, it is characterized in that also being provided with in the chamber wall tertiary air road (20), the inlet (18) in tertiary air road (20) is positioned at the below of moulded coal car (8) bottom 15, the outlet (22) in tertiary air road (20) is positioned at the position of top, chamber wall top, be in the outside of vault (6), this outlet (18) is provided with up or obliquely, and combustion chamber (1) also has a tertiary air quantity adjusting device.
6. counter-burning type kiln according to claim 1 and 2, the bottom that it is characterized in that burning (1) is a cap shape projection (16), this projection (16) is in order to the flow resistance of adjustments of gas (1) bottom in the combustion chamber, so that make the air that enters an air channel keep even substantially.
7. counter-burning type kiln according to claim 3, the bottom that it is characterized in that burning (1) is a cap shape projection (16), this projection (16) is in order to the flow resistance of adjustments of gas (1) bottom in the combustion chamber, so that make the air that enters an air channel keep even substantially.
8. counter-burning type kiln according to claim 4, the bottom that it is characterized in that burning (1) is a cap shape projection (16), this projection (16) is in order to the flow resistance of adjustments of gas (1) bottom in the combustion chamber, so that make the air that enters an air channel keep even substantially.
9. counter-burning type kiln according to claim 5, the bottom that it is characterized in that burning (1) is a cap shape projection (16), this projection (16) is in order to the flow resistance of adjustments of gas (1) bottom in the combustion chamber, so that make the air that enters an air channel keep even substantially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94104552 CN1122441A (en) | 1994-04-29 | 1994-04-29 | Briquet combusting reverberate furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94104552 CN1122441A (en) | 1994-04-29 | 1994-04-29 | Briquet combusting reverberate furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1122441A true CN1122441A (en) | 1996-05-15 |
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ID=5031668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94104552 Pending CN1122441A (en) | 1994-04-29 | 1994-04-29 | Briquet combusting reverberate furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1122441A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614472B (en) * | 2009-07-31 | 2010-12-29 | 吉林省建筑材料工业设计研究院 | Inner spiral drum-type rotary kiln |
| CN105526798A (en) * | 2016-02-19 | 2016-04-27 | 重庆升上源环境治理有限公司 | Combustion kiln system |
| CN106642676A (en) * | 2017-02-27 | 2017-05-10 | 中南大学 | Tunnel type reversal combustion hot blast stove |
| CN106642675A (en) * | 2017-02-27 | 2017-05-10 | 中南大学 | Reverse burning tunnel furnace for intensive flue-cured tobacco |
-
1994
- 1994-04-29 CN CN 94104552 patent/CN1122441A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614472B (en) * | 2009-07-31 | 2010-12-29 | 吉林省建筑材料工业设计研究院 | Inner spiral drum-type rotary kiln |
| CN105526798A (en) * | 2016-02-19 | 2016-04-27 | 重庆升上源环境治理有限公司 | Combustion kiln system |
| CN106642676A (en) * | 2017-02-27 | 2017-05-10 | 中南大学 | Tunnel type reversal combustion hot blast stove |
| CN106642675A (en) * | 2017-02-27 | 2017-05-10 | 中南大学 | Reverse burning tunnel furnace for intensive flue-cured tobacco |
| CN106642676B (en) * | 2017-02-27 | 2022-04-29 | 中南大学 | Tunnel type counter-burning hot-blast stove |
| CN106642675B (en) * | 2017-02-27 | 2022-07-19 | 中南大学 | Reverse burning tunnel furnace for intensive flue-cured tobacco |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |