CN1076919A - Pearlstone roasting method and equipment - Google Patents
Pearlstone roasting method and equipment Download PDFInfo
- Publication number
- CN1076919A CN1076919A CN 92102236 CN92102236A CN1076919A CN 1076919 A CN1076919 A CN 1076919A CN 92102236 CN92102236 CN 92102236 CN 92102236 A CN92102236 A CN 92102236A CN 1076919 A CN1076919 A CN 1076919A
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- China
- Prior art keywords
- coal dust
- combustion chamber
- air
- coal
- nozzle
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
- C04B20/06—Expanding clay, perlite, vermiculite or like granular materials
- C04B20/066—Expanding clay, perlite, vermiculite or like granular materials in shaft or vertical furnaces
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/14—Minerals of vulcanic origin
- C04B14/18—Perlite
- C04B14/185—Perlite expanded
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Civil Engineering (AREA)
Abstract
The invention discloses a kind of with the perlitic method and apparatus of coal dust calcining expansion.Solve and to use the technical problem of the most general cheap coal dust as fuel, adopted vertical cyclone combustion chamber, go into stove through interchanger, hot blast, negative pressure is moved.Process stabilizing, good product quality, pollutes for a short time at the output height, and class produces can reach 50-80m
3, the ratio of first-grade products can reach more than 80%, and average coal consumption is at 40kg/m
3Below, remarkable in economical benefits is for extensively utilizing and developing the energy-saving material expanded perlite product and opened up wide approach.
Description
The present invention relates to pearlstone roasting method and equipment thereof.
Particularly be the roasting method and the equipment of fuel with the coal.
Pearlstone industry has only the history of two more than ten years in China, and initial production is based on fuel oil, because the oil fuel supply is becoming tight, production cost increases, so that can't produce.The also favourable artificial coal gas of using, thermal conversion rate is low, the production cost height.Some countries of early eighties successively work out the lump coal sinter process, (scientific and technical literature press 1989 " coal burning pearlstone ") breaks through, but burn the lump coal stove, the furnace temperature instability causes poor product quality, and it is insufficient that perlite is expanded, also influence output, the freezing of a furnace accident also often takes place, and atmospheric pollution is serious, and workman's labor condition is also very poor.
The objective of the invention is to overcome existing calciner and promptly burn the existing furnace temperature instability of lump coal stove, cause the problem of poor product quality and a kind of pearlstone roasting method and equipment thereof are provided.
The objective of the invention is to realize: the pearlstone sinter process that comprises combustion chamber, feed, expansion, cooling, finished product separating technology process by following measure, its characteristics are to adopt vertical firing coal dust cyclone combustion chamber, hot blast to advance stove, negative pressure operation, fineness of pulverized coal is that 80-120 order coal dust is blown into the combustion chamber by hot blast, the injection direction of coal dust nozzle and hot-air mouth and combustion chamber radially are angle, make flame be the whirlwind state.Interchanger is equipped with in cooling chamber, by gas blower freezing air is blown into interchanger, and air heating to 100-400 ℃, is blown into the combustion chamber.The flue gas outlet end is equipped with induced draft fan, and exhaust air rate makes the operation of body of heater negative pressure greater than blast volume.
Coal dust straying quatity and hot blast air quantity can be according to charging capacity and combustion chambers burn status adjustment.Coal dust and spray hot wind angle and combustion chamber radially angulation are 20 to 75 degree.
Realize the stoving oven that pearlstone roasting method of the present invention partly is made up of combustion chamber, shrinking zone, expansion chamber, cooling chamber, separate chamber, product bunker, its characteristics are to have in the side, combustion chamber an above coal dust nozzle and hot-air mouth, by coal powder supply device coal dust is conducted to nozzle, spray into the combustion chamber by nozzle, its injection direction and combustion chamber radially angulation are 20 to 75 degree, in cooling chamber interchanger is housed, by gas blower freezing air is blown into and is blown into the combustion chamber after interchanger becomes warm air.At the exhaust emissions end induced draft fan is housed, induced draft fan air inducing amount has the opening of removing " eyebrow burning ", and is provided with openable lid greater than the blast volume of gas blower on the top of coal dust nozzle.
Coal powder supply device is made up of coal dust bucket, buncher, speed reduction unit, material feeder and air channel, coal dust nozzle that volume damper is housed, buncher power drives material feeder after slowing down, coal dust in the coal dust bucket is pushed the air channel that volume damper is housed, coal dust is sprayed into the combustion chamber by nozzle.Around the cooling chamber water tank and the air heat exchanger that can produce steam arranged, interchanger can be heat pipe-type, tube-sheet type, cross flow.
Compared with the prior art the present invention has the following advantages:
1, with the coal dust be fuel, the supply of fuel abundance, cost is low, and sufficient combustion, and coal dust is with cyclonic motion, therefore long the and air full contact of stroke burns fully, has reduced coal consumption, average every M coal consumption 30-40Kg(standard coal).Alleviate pollution, reached the purpose that improves product production.
2, because air output and coal dust supply amount to be and can to regulate, so furnace temperature can be controlled arbitrarily and regulate.Can satisfy high temperature and the desired different expansion temperature of low temperature ore in sand form like this, thereby can obtain maximum rate of expansion, improve quality product and output.The ratio of first-grade products (80kg/M
3Below) more than 80%.
3, by interchanger air heating is blown into the combustion chamber, thereby save energy, coal consumption reduced.Improve output, reduce cost.
Description of drawings is as follows:
Accompanying drawing 1 is a firing coal dust pearlstone stoving oven structural representation.
Accompanying drawing 2 is a combustion chamber section structure synoptic diagram.
Accompanying drawing 3 is a coal dust supplying regulator synoptic diagram.
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail: see that Fig. 1 is in the combustion chamber, spray into the above 80-120 order coal dust of calorific value 6000 kilocalorie/kilograms by coal dust nozzle (3), because nozzle and air port are to open radially 20-75 ° of angle (Fig. 2) partially, make coal dust in combustion chamber (1), be the burning of whirlwind state, enter expansion chamber (6) through shrinking zone (5) flame, ore in sand form expects that from the side hole (7) evenly puts into expansion chamber (6), this district's temperature is 1100-1300 ℃, perlite ore is in this interval, rapid expansion, the 5-25 that reaches original volume doubly.The cone table of body of heater for upwards shrinking.Enter cooling chamber (8) with the flame rising, outer water tank or the interchanger (8,9) that produces steam that be with of cooling chamber (8), then enter underpressure chamber (11), part product falls, be blown into bunker (14) by air-flow, pass through the big portion of centrifuge separator (12) product again and fall, be blown into bunker (14) by air-flow, tail gas is discharged to the external world by induced draft fan (13).Gas blower (10) is blown into interchanger (9) with freezing air, is blown into combustion chamber (1) after air is heated again.The exhaust air rate of induced draft fan causes to be the negative pressure operation in the body of heater greater than the blast volume of gas blower.Coal dust and hot blast straying quatity look charging capacity and state of combustion is regulated.The hole (4) that the removing " eyebrow burning " of inclination is arranged above the coal dust nozzle.The heap coke button that so-called " eyebrow burning " forms above nozzle is called " eyebrow combustion " untimely removing, influences the equipment operation.This opening also can be used as vision slit, and has lid to cover at any time.Coal powder supply device (seeing Fig. 2,3) drives material feeder (17) after being slowed down through speed reduction unit (16) by buncher (15).Material feeder can be auger type, tooth-like, abrasive disk type, and material feeder is conducted to nozzle (3) with coal dust, under the suction function of high velocity air, coal dust is blown in the combustion chamber (1).Coal dust is adjusted by buncher (15) for amount, and air quantity is regulated by the heating duct volume damper.The water tank (8) that produces steam can be installed around the cooling chamber, and steam can be done heating or do other as the maintenance pearlite slab usefulness of heating.Interchanger can be heat pipe-type, tube-sheet type, cross flow, and fuel gas temperature is descended, and hot blast temperature is improved.Stable through testing this apparatus and process, class produces can reach 50-80M
3, optimum regime can reach 100-120M
3, wherein the ratio of first-grade products reaches more than 30%, and average coal consumption reaches 40kg/M
3Below (standard coal), remarkable in economical benefits.
Claims (6)
1, the pearlstone roasting method, comprise the combustion chamber, feed, expand, cooling, finished product separates, it is characterized in that adopting the vertical cyclone combustion chamber of firing coal dust, hot blast advances stove, the negative pressure operation, fineness of pulverized coal is the 80-120 order, coal dust is blown into the combustion chamber by hot blast, and the injection direction of coal dust nozzle and hot-air mouth and combustion chamber radially are angle, makes flame be the whirlwind state, in cooling chamber interchanger is housed, by gas blower freezing air is blown into interchanger, air heating to 100-400 ℃, is blown into the combustion chamber, the flue gas outlet end is equipped with induced draft fan, and exhaust air rate makes the operation of body of heater negative pressure greater than blast volume.
2, method according to claim 1 is characterized in that coal dust straying quatity and hot blast air quantity can be according to charging capacity and combustion chambers burn status adjustment.
3, method according to claim 1 and 2, it is characterized in that coal dust and spray hot wind angle and combustion chamber radially angulation be 20 to 75 the degree.
4, realize the roasting apparatus of the described pearlstone roasting method of claim 1, comprise combustion chamber (1), shrinking zone (5), expansion chamber (6), cooling chamber (8), separate chamber (12), product bunker (14) part, it is characterized in that having coal dust nozzle (3) and hot-air mouth (2) in the side, combustion chamber, by coal powder supply device coal dust is conducted to nozzle, coal dust nozzle and hot-air mouth respectively are more than 1, its injection direction and combustion chamber radially angulation are 20 to 75 degree, gas blower (10) blasts freezing air and is blown into combustion chamber (1) after interchanger (9) becomes warm air, at the exhaust emissions end induced draft fan (13) is housed, induced draft fan air inducing amount is greater than the blast volume of gas blower, the opening (4) of removing " eyebrow burning " is arranged on the top of coal dust nozzle, and be provided with openable lid.
5, equipment according to claim 4, it is characterized in that coal powder supply device is by coal dust bucket (18) buncher (15) speed reduction unit (16), material feeder (17) and the air channel (2) of volume damper is housed and coal dust nozzle (3) is formed, buncher (15) power drives material feeder (17) coal dust in the coal dust bucket is pushed the air channel that volume damper is housed after slowing down, by nozzle coal dust is sprayed into the combustion chamber.
6, according to claim 4 and 5 described equipment, it is characterized in that around the cooling chamber water tank (8) and the air heat exchanger (9) that can produce steam being arranged, interchanger can be heat pipe-type, tube-sheet type, cross flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92102236 CN1076919A (en) | 1992-03-31 | 1992-03-31 | Pearlstone roasting method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92102236 CN1076919A (en) | 1992-03-31 | 1992-03-31 | Pearlstone roasting method and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1076919A true CN1076919A (en) | 1993-10-06 |
Family
ID=4939518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92102236 Pending CN1076919A (en) | 1992-03-31 | 1992-03-31 | Pearlstone roasting method and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1076919A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584065A (en) * | 2012-02-15 | 2012-07-18 | 关范 | Device for producing expanded perlite |
| CN106715358A (en) * | 2014-06-05 | 2017-05-24 | 宾德公司 | Method for expanding raw material in the form of sand grains |
| CN106715357A (en) * | 2014-06-05 | 2017-05-24 | 宾德公司 | Method for expanding sand-grain-shaped raw material |
-
1992
- 1992-03-31 CN CN 92102236 patent/CN1076919A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584065A (en) * | 2012-02-15 | 2012-07-18 | 关范 | Device for producing expanded perlite |
| CN102584065B (en) * | 2012-02-15 | 2015-05-06 | 关范 | Device for producing expanded perlite |
| CN106715358A (en) * | 2014-06-05 | 2017-05-24 | 宾德公司 | Method for expanding raw material in the form of sand grains |
| CN106715357A (en) * | 2014-06-05 | 2017-05-24 | 宾德公司 | Method for expanding sand-grain-shaped raw material |
| CN106715358B (en) * | 2014-06-05 | 2019-06-25 | 宾德公司 | Method for expanding sand grains type raw material |
| CN106715357B (en) * | 2014-06-05 | 2019-06-25 | 宾德公司 | Method for expanding sand grains type raw material |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |