CN1016461B - Power-saving circular brick kiln - Google Patents
Power-saving circular brick kilnInfo
- Publication number
- CN1016461B CN1016461B CN 88101569 CN88101569A CN1016461B CN 1016461 B CN1016461 B CN 1016461B CN 88101569 CN88101569 CN 88101569 CN 88101569 A CN88101569 A CN 88101569A CN 1016461 B CN1016461 B CN 1016461B
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- cigarette
- kiln
- waste heat
- hot
- firing chamber
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Abstract
The present invention relates to a tile roasting energy saving annular kiln. Compared with German type annular kilns in days gone by, the present invention is characterized in that a smoke heat secondary utilizing system and a residual heat recovering and utilizing system are additionally arranged for forming a three ring and one path type structure for realizing five zone technological process which is disclosed in Drawing 2. The annular kiln can save 300kg to 350kg standard coal for making myriad tiles under the condition that the annular kiln satisfies normal technological requirements; when water content of kiln blanks is of 10% to 15%, kiln blanks can still be roasted into normal products, and eligible semi-products entering the kiln can all be roasted into normal products. Because the structure of the present invention has sufficient heat utilization rate, long periods and high fire speed, and therefore, the daily yield of the present invention is roughly equal to myriad standard tiles.
Description
The invention belongs to kiln.
At present, the annular kiln of the existing firing brick-and tile of my face mostly is to continue to use moral formula annular kiln, and its structure is " ring together " promptly one to encircle the firing chamber,, a flue collector, branch flue all passes underground, so constructional difficulties, easily ponding, hinder and ventilate, influence burning, this kiln cigarette heat can only be moved at flue, and the flue gas that causes discharge is temperature too high (up to 100～200 ℃) not only, heat loss is big, quite every 10,000 bricks decreases about 400 kilograms in coal, and takes away many unburned carbon particles, and this kiln is strict to the adobe water content simultaneously, only be suitable for water content adobe seldom, (water content will be less than 6%), otherwise percent defective is very high, even be difficult to burn till certified products.Use this annular kiln, air drag is big in the kiln road, and heat transfer efficiency is low, hear rate is big, generally burns till ten thousand standard bricks and need consume 1.5 tons in coal, and product percent of pass is low, this to the enterprise of condition difference under adobe water content situation rambunctious, even more serious.
Chinese invention patent CN85108871A discloses a kind of S type and has worn fork kiln and S type crossling operation method, its objective is provides a kind of waste heat of can recycling to come Wen Ji is dehydrated, do not need wet basis to dry in the air and hothouse, it is characterized in that: the S type is worn the fork kiln two outer kiln tubes and an inner kiln tube, and three kiln pipes are linked to be the dicyclo type that the head and the tail with the S type are connected its bend.Roasting flue net, hydrofuge flue net, salband hot blast and wet basis dewatering plate are arranged in the kiln, and its weak point is:
1. roasting flue net disperses parallel flue to form by four, such structure flue is long, area of dissipation is big, resistance coefficient is big, the corresponding energy consumption that just increased, also be easy to generate gas leak phenomenon, every flue of the layout of this spline structure can only be controlled several firing chambers separately in addition, and control disperses, and only plays the smoke evacuation effect in the roasting process.The roasting process fume afterheat can't be recycled.
2. humidity discharging flue net is two humidity discharging flue collectors that dispersion is parallel, hot-flow flue in can only utilizing between outer kiln tube waste heat of salband during narrow pipe in roasting process operates at, and can only use the rate of recovery of waste heat and utilize can be high as the humidity discharging of dewatering to the firing chamber of an outer kiln tube straight-tube portion institute sign indicating number hack; Utilizing on the mode be: the waste heat hot-flow flue low from the firing chamber is towards the humidity discharging mouth motion of top side, firing chamber, dehydration humidity discharging to whole firing chamber is difficult to spread evenly, it is wet uneven that this will make the base of a firing chamber itself just do, influence in the kiln hot parallel, also influence produces quality, make it inconsistent: the medium that is used for humidity discharging is the high temperature drying waste heat of directly drawing from kiln pipe salband, there is not regulating power again, it is danger close that such drying medium is used for to wet basis base dehydration humidity discharging, is easy to dehydrate because of overrunning cause product drying process crackle or burst.
3. process operation is to wear the fork operation with the S type in kiln, when running on inner kiln tube, passage will stay in corresponding outer brickkiln door place, make the bad buttress of outer kiln tube all get twice yard dress, increased operation, increased because of difficulty, strengthened material consumption, just be difficult to accomplish that the base type of twice yard dress or density are consistent with temperature.
4. the wet basis dehydration is provided with, and mainly is the cover plate that utilizes on kiln roasting flue collector and the humidity discharging flue collector, and this is difficult to realize.
It is to avoid above-mentioned the deficiencies in the prior art and provide that a kind of control is concentrated, the flue area of dissipation is little that order of the present invention is engaged in, resistance coefficient is little, the service efficiency height, can make full use of the salband waste heat, the cigarette heat loss is extremely low, each system can Comprehensive Control and improve burning condition, heat transfer, drying property, the energy-conservation and roasting kiln that improves product quality and yield in the kiln.
Finishing technical solution of the present invention is:
1. flue collector is arranged in the middle of firing chamber's ring, main cigarette vertical shaft and main cigarette lock divide two rows to be staggered in flue collector, and main cigarette lock and flue collector baseplane are contour, exceed the step in baseplane, firing chamber at the bottom of the flue collector, chimney or air-introduced machine mouth are located in the middle of the flue collector, this structure flue collector is not only done the smoke evacuation in the roasting process, is the control hinge of other system yet, and flue is concentrated, flue collector is short, resistance coefficient is little, area of dissipation is little, seal tight, chimney bottom temperature height, draft is strong.
2. salband heat recovery system is by: the coal feeding hole that each top, firing chamber is provided with connect waste heat air lock that the waste heat by-path of each coal feeding hole links to each other with waste heat by-path one end and along contour with the hot road of cigarette ring between ring inboard, firing chamber and the flue collector, and parallel ground outside flue collector a week continuously closed waste heat road ring form, waste heat road ring has only to encircle with the firing chamber by waste heat lock, waste heat by-path, coal feeding hole and communicates.Such structural configuration, its function are the waste heats of the whole roasting process salband of recovery that can be full and uniform, concentrate in the waste heat road ring, and a part of waste heat lock in combustion back transfers to the roasting band, to the oxygen supply of roasting band secondary, has not only replenished oxygen but also can improve burning condition.Most of waste heat transfers to dry zone, under waste heat lock and the control of main cigarette lock, supply with each firing chamber of dry zone as required, mix the drying medium that is adjusted to suitable temperature and humidity with the flue gas of recycling, again because waste heat is equally distributed each coal feeding hole from each top, firing chamber, spray into from top to bottom, hothouse air curtain and dry atmosphere are improved, dry humidity discharging process is longer, therefore, not only reached and make full use of waste heat but also can reach good drying effect, promptly reduced the waste heat loss, improved product quality again, enlarged the adaptability of kiln the unfired bricks moisture content.
3. be provided with flue gas recycling system, encircle the outside in each firing chamber by being arranged on the firing chamber, the above a plurality of cigarette hot-air mouths of Horizon between two wickets.The hot vertical shaft of cigarette that links to each other with the cigarette hot-air mouth, be installed on the hot pit mouth of cigarette Yan Rezha and along between the ring outside, firing chamber and the external wall of kiln, more than the wicket, and the closed continuously together hot road of the cigarette ring composition on parallel ground.The hot lock of cigarette is installed on the interior hot pit mouth of cigarette of the hot road of cigarette ring.The hot road of cigarette ring has only by Yan Rezha, the hot vertical shaft of cigarette, cigarette hot-air mouth and communicates with firing chamber's ring.The feature of this system layout is: be recovered in the hot road of the cigarette ring passed through the flue gas that also has suitable high-temperature that once conducts heat by the preheating zone; do not make its direct discharge; but each the dry firing chamber that transfers to dry zone again carries out discharging behind the secondary heat exchange to hack; cigarette heat is fully used; make in the flue gas with not combustion or unburnt carbon granules or high temperature flying dust further obtain filtered and recycled, not only reduced the cigarette heat loss, improved dry run but also purified flue gas.
Fig. 1 is an annular kiln differing heights plane cut-away view.
Wherein: E-E V ± 0.000
F-F V +1.000
G-G V +2.500
H-H V +4.000
Fig. 2 is the annular kiln front section view.
Fig. 3 is the annular kiln cross-sectional view.
Fig. 4 is the thermal technology principle figure of annular kiln.
Fig. 5 is the hot cross section of an annular kiln cigarette flow graph.
Fig. 6 is an annular kiln waste heat cross section flow graph.
Fig. 7 is an annular kiln waste heat vertical section flow graph.
Fig. 8 is the hot vertical section flow graph of annular kiln cigarette.
Brick (watt) relation between roasting energy saving annular kiln primary structure and each one:
One. structure:
Firing chamber ring (1), the main cigarette vertical shaft in main cigarette air port (6) (7), main cigarette lock (8) flue collector (9), chimney or blower fan (10), coal feeding hole (11), wicket (15) and the hot secondary of cigarette utilize system: cigarette hot-air mouth (2), the hot vertical shaft of cigarette (3), the hot lock of cigarette (4), the hot road of cigarette ring (5) and residual neat recovering system: waste heat by-path (12), waste heat lock (13), waste heat road ring (14), heating pipe (16).
Two, the relation between each one:
Firing chamber's ring (1) is an archway, establishes a wicket (15) at a certain distance.Between each wicket (15) of firing chamber's ring (1), the outside is provided with the logical hot vertical shaft of cigarette (3) of two cigarette hot-air mouths (2), is communicated with the hot road of cigarette ring (5) by Yan Rezha (4) control.Inboard between firing chamber's ring (1) each wicket correspondingly is provided with the logical main cigarette vertical shaft (7) in a main cigarette air port (6), is communicated with flue collector (9) by main cigarette lock (8) control.The middle part of flue collector (9) is provided with chimney or the logical airspace of air blower (10).The vault of (1) is provided with four coal feeding holes (11) every about one meter outside the firing chamber in addition, and as throwing in external combustion and seeing fire, each coal feeding hole (11) communicates with waste heat by-path (12).Communicate with waste heat road ring (14) by waste heat lock (13) control.
Annular kiln of the present invention except that the basis all structures all more than ground.
Use the annular kiln of said structure, just can whole sintering procedure be divided into five bands, that is: dry zone (I), pre-temperate zone (II), roasting band (III), insulation belt (IV), salband (V) according to the requirement of roasting technique.Whole sintering procedure all carries out by above five bands in firing chamber (1) circularly, goes out the continuous production of load continuously.
All power of annular kiln of the present invention are paid by chimney or blower fan, utilize just paying and press principle to finish each process.
1. cigarette thermal flow process and function:
Air enters salband (V) from the wicket (15) opened and the empty firing chamber (1) that goes out dress section.Portion of air is heated through insulation belt (IV), continue to participate in burning to roasting band III forward, the high-temperature flue gas that generates moves forward in firing chamber (1) and enters preheating zone (II), hack is carried out pre-temperature heating, have then and enter cigarette hot-air mouth (2) distributively and enter Yan Redao ring (5) by Yan Rezha (4) control through the hot vertical shaft of cigarette (3), in Yan Redao ring (5), move to the position-dry zone (I) that is not burnt paper retaining (a) more forward and enter the horizontal hack of plunderring in firing chamber (1) respectively through the hot vertical shaft of cigarette (3) cigarette hot-air mouth (2), under the control of main cigarette lock (8), enter flue collector (9) by main air port (6) through main cigarette vertical shaft (7) through secondary heat transfer back by the hot lock of corresponding cigarette (4) control.
2. heat recovery flow process and function:
Enter the gas that another part in the salband (V) has been heated, enter waste heat by-path (12) through coal feeding hole (11), enter waste heat road ring (14) by waste heat lock (13) control with the form of waste heat.Under action of pressure, travel forward.Sub-fraction waste heat air-flow moves to roasting band (III) front end and passes waste heat by-path (12) by waste heat lock (13) control and enter firing chamber (1) from top to bottom by coal feeding hole (III), as the secondary air feed, improves oxidation reaction; Most of waste heat gas moves to dry zone (I) position by several corresponding waste heat lock (13) control, enter firing chamber (1) through waste heat by-path (12) from top to bottom by coal feeding hole (11), at this moment the dry gas waste heat air-flow with uniform temperature and the horizontal flue gas of plunderring in the firing chamber that enter in the firing chamber (1) bump against mixing, the hack heat exchange after the main cigarette vertical shaft in main cigarette air port (6) (7) enters flue collector (9) by main cigarette lock (8) control, is discharged by chimney or blower fan (10) at last.
Annular kiln of the present invention is compared with moral formula annular kiln in the past, has obviously advantage and economic benefit.
One, the advantage of the hot secondary utilization of cigarette:
1. improved heat utilization efficiency:
This annular kiln is that the flue gas of preheating zone (II) has been called in again dry zone (I) in batches, is distributed in 5～6 firing chambers, and hack is conducted heat again, therefore, has improved heat utilization efficiency. (seeing Table one)
Can see that by upper table ten thousand standard bricks of this kiln roasting can reduce the suitable 316.3kg mark of exhaust gas heat loss coal.
2. reduced the loss of the mechanical incomplete combustion of fuel:
Moral formula annular kiln is because due to its structure, and carbon particle of burning (account for input amount 10%) and high temperature flying dust have not caused the waste of fuel directly by chimney or blower fan discharge.The function of this kiln because of there being the hot secondary of cigarette to utilize, this part high temperature flying dust and free charcoal particle are filtered at dry zone (II) be adsorbed on billet surface, unlikely direct discharge has not only improved heat transfer efficiency but also can burn once more when entering roasting band (III), has saved fuel and has improved the thermal efficiency again.Generally per hour can economize on coal and mark coal about 28kg, more than quite every 10,000 bricks feast-brand mark coal 80kg.
3. improve drying property, improve adaptability, guarantee product quality:
Brick (watt) in the sintering procedure, concerning any kiln, get rid of the process of the remaining mechanical water in the base substrate, must strict control the temperature and humidity of suitable drying medium well, grasp rate of drying, otherwise product quality will be subjected to very big influence.The unfired bricks water content is bigger than normal or dried wet inconsistent, then even more serious.General annular kiln is difficult to satisfy this condition.The utility model kiln just has this function, because, the flue gas of being transferred to dry zone (I) is accessed by high temperature preheating band (II), it has the low humidity high temperature properties, pass through the distribution utilization of several firing chambers again, the gas flow temperature and the flow that enter each chamber hack are subjected to suitable control, just can realize by low temperature to high temperature, are heated to stably carrying out humidity discharging step by step at a high speed by low speed.The main foundation that Here it is improves adaptability and improve the quality of products.
Two, the advantage of heat recovery:
1. minimizing heat waste cuts down the consumption of energy:
General brick (watt) kiln, burn till back insulation cooling stage at product and storing a large amount of heat, this part heat part is entered the air of firing chamber (1) and is brought into the roasting band, but still there is a large amount of storage heat not take away, influence cools, influence that kiln discharge is working properly to carry out, for this reason, other kiln mostly adopts the way of artificial heat elimination and cooling, cause a large amount of surpluses drain the waste very big, annular kiln of the present invention per hour can force to reclaim 150 ℃ of mean temperatures, flow 8000m from salband (V) by residual neat recovering system
3The waste heat of/h transfers in the firing chamber of dry zone (I), participates in the humidity discharging of hack is heated, and quite per hour reclaims 26kg mark coal, but every 10,000 bricks province-norm coal 77kg.
2. improve the oxic gas branch of roasting process:
The waste heat gas that accesses from salband, also can transfer it a part to charge into roasting band (III) front end according to the condition of a fire, make the secondary air feed, improve burning condition, avoid unburnt generation to guarantee that product is fully reacting in the oxic gas branch, improve the quality of products, prevent that embossing and evil mind brick from occurring.
3. raising drying property:
Because waste heat is to have the high dry gas of temperature, again in coal feeding hole (11) carries out firing chamber (1) from top to bottom.It bumps against with horizontal flue gas of plunderring hack and mixes, and has just improved the convection heat transfer' heat-transfer by convection performance greatly, has increased heat transfer area, has also replenished the temperature of flue gas accordingly, has improved drying property and heat transfer efficiency.
4. replenished the temperature of dry zone (I) and chimney bottom:
This part waste heat is directly to enter dry zone (I) resistance, heat waste seldom from salband (V), both replenished the heat energy of medium, improved temperature, accelerated simultaneously the rate of drying of base substrate accordingly, created condition for improving the output value, the also corresponding rate of drying that has improved base substrate guarantees to have enough drafts.
5. comprehensive utilization also can be laid a certain amount of pipeline heating steam and hot water.
Table 1 energy saving annular kiln and moral formula annular kiln cigarette decrease contrast
Quite mark coal kg
Exhaust gas temperature working flow exhaust gas heat loss
Ten thousand of ℃ kg/h kJ/h kg/h kg/
Energy saving annular kiln～50 1,500 474,750 16.2 46.3
Moral formula annular kiln 100～200～25,470 3.6 * 10
6～122.3 407.6
Claims (2)
1, a kind of power-saving circular brick kiln, comprise and form firing chamber, firing chamber ring (1), throw the coal feeding hole (11) of coal by main cigarette air port (6), main cigarette vertical shaft (7), main cigarette lock (8), the flue collector (9) that communicates with the firing chamber, chimney or blower fan mouth (10), in the firing chamber, and the hot secondary of cigarette utilizes system and residual neat recovering system.The hot secondary of cigarette utilize system to comprise to be positioned at the ring outside, firing chamber the hot road of cigarette ring (5), the hot road of UNICOM's cigarette ring (5) and firing chamber cigarette hot-air mouth (2), the hot vertical shaft of cigarette (3) that links to each other with cigarette hot-air mouth (2) and be installed in Yan Rezha (4) on the hot vertical shaft of cigarette (3) mouth; Residual neat recovering system comprise be positioned at the firing chamber inboard with flue collector (9) between circlewise waste heat road ring (14), be communicated with the waste heat by-path (12) of waste heat road ring (14) and firing chamber and be installed in waste heat air lock (13) on the waste heat by-path (12); It is characterized in that the baseplane of flue collector (9) exceeds step of terrace of firing chamber (1), main cigarette lock (8) and main cigarette vertical shaft (7) divide two rows to be staggered in flue collector (9), chimney or air-introduced machine mouth (10) are arranged in the middle of the flue collector (9), the hot road of cigarette ring (5) and waste heat road ring (14) are continuously closed, and waste heat by-path (12) connects with coal feeding hole (11).
2, power-saving circular brick kiln as claimed in claim 1 is characterized in that being laid with heating pipe (16) in the said waste heat road ring (14), and water pipe one end and watering join, the other end with communicate with drainage facility.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88101569 CN1016461B (en) | 1988-03-24 | 1988-03-24 | Power-saving circular brick kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88101569 CN1016461B (en) | 1988-03-24 | 1988-03-24 | Power-saving circular brick kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1034993A CN1034993A (en) | 1989-08-23 |
| CN1016461B true CN1016461B (en) | 1992-04-29 |
Family
ID=4831802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88101569 Expired CN1016461B (en) | 1988-03-24 | 1988-03-24 | Power-saving circular brick kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016461B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2129985B8 (en) * | 2007-09-18 | 2012-10-31 | INNOVATHERM Prof. Dr. Leisenberg GmbH + Co. KG | Method and device for heat recovery |
| CN103925790B (en) * | 2014-05-12 | 2017-11-24 | 祥云县黄金工业有限责任公司 | A kind of ring-type backheating type roaster |
-
1988
- 1988-03-24 CN CN 88101569 patent/CN1016461B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1034993A (en) | 1989-08-23 |
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