CN110981229A - Annular sleeve type shaft kiln and method for calcining co-fired lime - Google Patents
Annular sleeve type shaft kiln and method for calcining co-fired lime Download PDFInfo
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- CN110981229A CN110981229A CN201911366890.7A CN201911366890A CN110981229A CN 110981229 A CN110981229 A CN 110981229A CN 201911366890 A CN201911366890 A CN 201911366890A CN 110981229 A CN110981229 A CN 110981229A
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- kiln body
- shaft kiln
- shaft
- calcining
- ejector
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- 238000001354 calcination Methods 0.000 title claims abstract description 57
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 12
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 12
- 239000004571 lime Substances 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 238000009423 ventilation Methods 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000428 dust Substances 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 2
- 238000007664 blowing Methods 0.000 abstract description 6
- 239000002245 particle Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000010344 co-firing Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
Images
Classifications
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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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The invention provides a ring sleeve-shaped shaft kiln and a method for calcining co-fired lime, belonging to the technical field of lime calcination, wherein the ring sleeve-shaped shaft kiln comprises a shaft kiln body and an inner kiln body, the inner kiln body is arranged in the shaft kiln body, and a calcining area is formed by an annular cavity between the inner kiln body and the shaft kiln body; the ring sleeve-shaped shaft kiln further comprises a driving air-blowing system, and the driving air-blowing system comprises: the ejector is arranged at the bottom of the inner kiln body and used for upwards ejecting and guiding water so as to form negative pressure at the bottom of the inner kiln body; the driving fan is used for pumping the gas in the shaft kiln body out of the air draft cylinder and circulating the gas to the ejector for ejection; the heat exchanger is arranged outside the shaft kiln body and used for cooling the gas pumped out from the shaft kiln body and then circulating the gas to the ejector to be ejected. According to the invention, the inner kiln body is arranged in the shaft kiln body, and the annular cavity between the inner kiln body and the shaft kiln body forms the calcining area, so that ventilation is uniform, and uniform calcination of materials is realized.
Description
Technical Field
The invention belongs to the technical field of lime calcination, and particularly relates to an annular sleeve-shaped shaft kiln.
Background
When the small blocks and the medium blocks are fired by a conventional vertical kiln, because the material particles are small and the resistance in the kiln is large, poor ventilation exists in the middle during calcination, the material is over-burnt at the edge of the kiln, and under-burnt at the center of the kiln, namely lime calcination is not uniform, and the product percent of pass is low.
Disclosure of Invention
Based on the background problem, the invention aims to provide an annular sleeve type shaft kiln, wherein an inner kiln body is arranged in a shaft kiln body, and a calcining area is formed in an annular space between the inner kiln body and the shaft kiln body, so that ventilation is uniform, and uniform calcination of materials is realized. The invention also aims to provide a method for calcining the co-fired lime in the annular shaft kiln.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides an annular ring shaft kiln, includes the shaft kiln body, still includes: the inner kiln body is arranged in the shaft kiln body and forms a ring sleeve structure with the shaft kiln body, and an annular cavity between the inner kiln body and the shaft kiln body forms a calcining area.
In one embodiment, the inner kiln body is fixed in the shaft kiln body through a plurality of connecting arch bridges, and the connecting arch bridges are annularly distributed between the inner kiln body and the shaft kiln body; the inner kiln body comprises an upper kiln body distributed above the connecting arch bridge and a lower kiln body distributed below the connecting arch bridge, the lower kiln body extends downwards to the bottom of the shaft kiln body, and the lower kiln body and the shaft kiln body are supported on the same plane; a calcining area is formed between the upper kiln body and the shaft kiln body, and the lower kiln body is arranged in the cooling area.
Preferably, the top of the upper kiln body is of a conical structure.
Preferably, the height of the inner kiln body is 2/5-3/5 of the height of the shaft kiln body.
In one embodiment, the ring-sleeve shaft kiln further comprises a driving blower system comprising: and the ejector is arranged at the bottom of the inner kiln body, and the ejector sprays and guides the water upwards to enable the bottom of the inner kiln body to form negative pressure.
Preferably, the driving blowing system further includes: the air draft tube is arranged at the top of the shaft kiln body and is positioned above the inner kiln body; and the driving fan is arranged outside the shaft kiln body and used for pumping gas in the shaft kiln body out of the air draft tube and circulating the gas to the ejector to be ejected.
Preferably, the driving blowing system further includes: the heat exchanger is arranged outside the shaft kiln body and is respectively communicated with the air draft tube and the ejector through pipelines, so that the air drawn out of the shaft kiln body is cooled and then circulates to the ejector to be ejected.
In one embodiment, the top of the shaft kiln body is also communicated with a dust collector through a pipeline.
In order to achieve the purpose, the invention also provides a method for calcining the co-fired lime in the annular shaft kiln, which comprises the following steps: the materials move from top to bottom in the shaft kiln body and enter an annular cavity between the inner kiln body and the shaft kiln body for calcination, and the calcined materials pass through the bottom of the inner kiln body and are discharged after being cooled; the ventilation in the shaft kiln body consists of two parts, wherein the main air volume is provided by a driving fan and forms driving air, the secondary air volume is sucked by an ejector at the bottom of the inner kiln body under negative pressure and forms negative pressure suction air, and the driving air and the negative pressure suction air are mixed and then are sprayed by the ejector to complete the ventilation; the driving wind and the negative pressure suction wind are both hot wind.
Wherein, the material calcination is divided into a preheating zone, a calcination zone, a post-positioned zone and a cooling zone from top to bottom; the temperature of the preheating zone is less than 850 ℃, the temperature of the calcining zone is 850-1100 ℃, the temperature of the post-positioned zone is 1100-650 ℃, and the temperature of the cooling zone is 650-60 ℃; the preheating zone time is 3-7h, the calcining zone time is 2-4h, the post zone time is 0.5-1h, and the cooling zone time is 1-3 h.
Compared with the prior art, the invention has the following effects:
1. the inner kiln body is arranged in the shaft kiln body, and the annular cavity between the inner kiln body and the shaft kiln body forms the calcining area, namely the calcining areas are all positioned at the edge part of the shaft kiln body, so that the ventilation is uniform to realize the uniform calcination of materials.
2. The ejector is arranged at the bottom of the shaft kiln body, the ejector ejects upwards to guide the flow to drive the shaft kiln body to ventilate, negative pressure can be formed at the bottom of the shaft kiln body, the defects of air leakage and ash leakage caused by high-pressure blast in the conventional method are overcome, no special requirement is required on the tightness of ash discharging equipment, and the investment cost of the equipment is reduced.
3. According to the invention, the air draft tube is arranged at the top of the shaft kiln body, the air flow in the shaft kiln body is organically drawn out from the air draft tube by driving the fan, then the air flow exchanges heat with the heat exchanger arranged outside the shaft kiln body, and finally the driving gas enters the ejector to be sprayed out, namely enters the shaft kiln body to be subjected to oxygen supplementation combustion.
4. The annular sleeve type shaft kiln reduces the under-burning rate and the over-burning rate of materials from 10 to 30 percent to 4 to 5 percent; the concentration of the dust at the bottom of the kiln is 100g/m3Reduced to 10mg/m3。
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic structural view of a ring-in-ring type shaft kiln in example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings of the specification, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example 1
In order to solve the defect of uneven material calcination caused by poor ventilation at the center of the conventional shaft kiln, as shown in fig. 1, the invention provides an annular sleeve type shaft kiln, which comprises a shaft kiln body 1 and an inner kiln body, wherein the shaft kiln body 1 is divided into a feeding area A, a preheating area B, a calcining area C and a cooling area D from top to bottom, the inner kiln body is arranged in the shaft kiln body 1 and forms an annular sleeve structure with the shaft kiln body 1, an annular cavity between the inner kiln body and the shaft kiln body 1 forms the calcining area C, so that the whole calcining area C is equivalent to the edge part of the shaft kiln body 1, the whole calcining area C is uniformly ventilated, and the material is uniformly calcined.
In this embodiment, as shown in fig. 1, the inner kiln body is fixed in the shaft kiln body 1 through a plurality of connecting arch bridges 201, and the plurality of connecting arch bridges 201 are annularly distributed between the inner kiln body and the shaft kiln body 1, that is, one end of the connecting arch bridge 201 is fixed to the outer wall of the inner kiln body, and the other end is fixed to the inner wall of the shaft kiln body 1, so as to ensure the stability of the inner kiln body.
Specifically, the inner kiln body comprises an upper kiln body 2-1 distributed above the connecting arch bridge 201 and a lower kiln body 2-2 distributed below the connecting arch bridge 201, the lower kiln body 2-2 extends downwards to the bottom of the shaft kiln body 1, the lower kiln body 2-2 and the shaft kiln body 1 are supported on the same plane, and therefore the upper kiln body 2-1 is located in the calcining area C, and the lower kiln body 2-2 is arranged in the cooling area D.
In this embodiment, the height of the inner kiln body is 1/2 of the height of the shaft kiln body 1, that is, the inner kiln body of this embodiment is disposed at the lower part of the shaft kiln body 1, and the top end of the inner kiln body extends upward to the center of the height of the shaft kiln body 1, but the height of the inner kiln body is not limited thereto, and in other embodiments, the height of the inner kiln body may be slightly lower than 1/2 of the height of the shaft kiln body 1, or slightly higher than 1/2 of the height of the shaft kiln body 1.
In order to enable the materials to smoothly enter an annular cavity (calcining area C) between the upper kiln body 2-1 and the shaft kiln body 1, the top of the upper kiln body 2-1 is arranged to be of a conical structure, and the materials can completely enter the calcining area C for calcining after entering.
The ring-sleeve shaft kiln further comprises a driving air blowing system, and in the embodiment, the driving air blowing system comprises: a draft tube 3, a driving fan, a heat exchanger 4 and an ejector 5.
In this embodiment, the air draft tube 3 is arranged at the top of the shaft kiln body 1 and is positioned above the inner kiln body, the air in the shaft kiln body 1 is drawn out from the air draft tube 3 through the driving fan and circulated to the ejector 5 for ejection, and the air flow drawn out from the air draft tube 3 can be recycled due to the fact that the temperature of the air flow is about 800 ℃, specifically, the heat exchanger 4 is arranged outside the shaft kiln body 1, the heat exchanger 4 is respectively communicated with the air draft tube 3 and the ejector 5 through a pipeline, the air flow drawn out from the air draft tube 3 enters the heat exchanger 4 for heat exchange and cooling and then is conveyed to the ejector 5, and the air temperature after heat exchange and cooling is about 450 ℃.
The ejector 5 is arranged at the bottom of the inner kiln body, specifically in the lower kiln body 2-2, the ejector 5 upwards ejects and drains to drive the interior of the shaft kiln body 1 to ventilate, so that negative pressure is formed at the bottom of the shaft kiln body 1, the problem of air leakage and ash leakage can be solved, and gas after heat exchange and temperature reduction is ejected through the ejector 5 to enter the shaft kiln body 1 for oxygen supplement combustion. Because the drainage effect of the ejector 5 generates negative pressure at the bottom of the lower kiln body 2-2, peripheral airflow is brought into the lower kiln body 2-2 by jet flow, and therefore the peripheral airflow can enter the ejector 5 after heat exchange through a cooling zone, and the entering temperature is about 300 ℃.
In order to remove dust, the top of the shaft kiln body 1 is also communicated with a dust collector 6, and the dust is pumped into the dust collector 6 through a fan.
The ring sleeve-shaped shaft kiln of the embodiment reduces the under-burning rate and the over-burning rate of the materials from 10-30% to 4-5%; the concentration of the dust at the bottom of the kiln is 100g/m3Reduced to 10mg/m3。
It should be noted that the driving fan, the heat exchanger 4, the ejector 5, and the dust collector 6 in this embodiment are all existing products, and therefore, detailed descriptions of the structures of these components will not be repeated in this embodiment.
Example 2
The embodiment provides a calcination method for co-firing lime in an annular shaft kiln, which comprises the following steps:
1. weighing and uniformly mixing the medium lump material with the particle size of 30-60mm and the smokeless coal particles with the particle size of 10-20mm, lifting the mixture to the top of the shaft kiln body 1 by adopting lifting and transporting equipment, and rotationally distributing the mixture into the shaft kiln body 1;
2. the materials move from top to bottom in the shaft kiln body 1, enter the calcining area C for calcining under the action of the conical top of the upper kiln body 2-1, pass through the lower kiln body 2-2 after the decomposition of the calcium carbonate is finished, and are discharged by an ash discharging machine after being cooled.
The calcination of material is divided into "four zones" from top to bottom, which are respectively: a preheating zone (normal temperature-850 ℃), a calcining zone (high temperature zone) 850-1100 ℃, a post zone (1100-650 ℃), and a cooling zone (650-60 ℃); the calcination times for the four bands were: a preheating zone 7h, a calcining zone (high-temperature zone) 4h, a post-positioned zone 1h and a cooling zone 3h, wherein the whole period is as follows: and (5) 15 h.
3. Ventilation (oxygen supply) in the shaft kiln body 1: the air conditioner is divided into two parts, wherein the main air volume (about 2/3) is provided by a driving fan, the secondary air volume (about 1/3) is sucked in by the negative pressure of an ejector 5 at the bottom of the inner kiln body, and the driving air and the negative pressure sucked air are mixed and then sprayed in by the ejector to complete ventilation (oxygen supply);
the two parts of air supply are hot air, the main air is subjected to heat exchange by a heat exchanger 4 to obtain hot air with the temperature of 450 ℃, and the heat of the secondary air is from the hot air with the temperature of 300 ℃ which is subjected to heat exchange with hot materials at the bottom of the shaft kiln body 1; the air draft tube 3 at the upper part in the shaft kiln body 1 is a device for ensuring that the air flow in the kiln overcomes the material resistance to realize smooth flow, the temperature of the air flow in the air draft tube 3 is about 800 ℃, and hot air (flue gas) in the air draft tube 3 is subjected to heat exchange by the heat exchanger 4, then is converged with the flue gas at the top of the kiln, enters the dust collector 6 for treatment and then is discharged into the atmosphere.
The preheating zone corresponds to the preheating zone B, the calcining zone corresponds to the calcining zone C, and the postzone and the cooling zone correspond to the cooling zone D.
Example 3
The embodiment provides a calcination method for co-firing lime in an annular shaft kiln, which comprises the following steps:
1. weighing and uniformly mixing small lump materials with the particle size of 15-30mm and smokeless coal particles with the particle size of 5-10mm, lifting the mixture to the top of the shaft kiln body 1 by adopting lifting and transporting equipment, and rotationally distributing the mixture into the shaft kiln body 1;
3. the materials move from top to bottom in the shaft kiln body 1, enter the calcining area C for calcining under the action of the conical top of the upper kiln body 2-1, pass through the lower kiln body 2-2 after the decomposition of the calcium carbonate is finished, and are discharged by an ash discharging machine after being cooled.
The material is calcined and is divided into four bands from top to bottom, which are respectively: a preheating zone (normal temperature-850 ℃), a calcining zone (high temperature zone) 850-1100 ℃, a post zone (1100-650 ℃), and a cooling zone (650-60 ℃); the calcination times for the four bands were: preheating zone 3h, calcining zone (high temperature zone) 2h, postzone 0.5h, cooling zone 1h, full cycle: 6.5 h.
3. Ventilation (oxygen supply) in the shaft kiln body 1: the air conditioner is divided into two parts, wherein the main air volume (about 2/3) is provided by a driving fan, the secondary air volume (about 1/3) is sucked in by the negative pressure of an ejector 5 at the bottom of the inner kiln body, and the driving air and the negative pressure sucked air are mixed and then sprayed in by the ejector to complete ventilation (oxygen supply);
the two parts of air supply are hot air, the main air is subjected to heat exchange by a heat exchanger 4 to obtain hot air with the temperature of 450 ℃, and the heat of the secondary air is from the hot air with the temperature of 300 ℃ which is subjected to heat exchange with hot materials at the bottom of the shaft kiln body 1; the air draft tube 3 at the upper part in the shaft kiln body 1 is a device for ensuring that the air flow in the kiln overcomes the material resistance to realize smooth flow, the temperature of the air flow in the air draft tube 3 is about 800 ℃, and hot air (flue gas) in the air draft tube 3 is subjected to heat exchange by the heat exchanger 4, then is converged with the flue gas at the top of the kiln, enters the dust collector 6 for treatment and then is discharged into the atmosphere.
It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (10)
1. The utility model provides an annular ring shaft kiln, includes the shaft kiln body, its characterized in that still includes:
the inner kiln body is arranged in the shaft kiln body and forms a ring sleeve structure with the shaft kiln body, and an annular cavity between the inner kiln body and the shaft kiln body forms a calcining area.
2. The annular sleeve-shaped shaft kiln as claimed in claim 1, wherein the inner kiln body is fixed in the shaft kiln body by a plurality of connecting arch bridges annularly distributed between the inner kiln body and the shaft kiln body;
the inner kiln body comprises an upper kiln body distributed above the connecting arch bridge and a lower kiln body distributed below the connecting arch bridge, the lower kiln body extends downwards to the bottom of the shaft kiln body, and the lower kiln body and the shaft kiln body are supported on the same plane;
a calcining area is formed between the upper kiln body and the shaft kiln body, and the lower kiln body is arranged in the cooling area.
3. The annular sleeve-shaped shaft kiln as claimed in claim 2, wherein the top of the upper kiln body is of a cone-shaped structure.
4. The annular sleeve-shaped shaft kiln as claimed in claim 2, wherein the height of the inner kiln body is 3/5-4/5 of the height of the shaft kiln body.
5. The ring sleeve shaft kiln of claim 1, further comprising a drive blower system, said drive blower system comprising:
and the ejector is arranged at the bottom of the inner kiln body, and the ejector sprays and guides the water upwards to enable the bottom of the inner kiln body to form negative pressure.
6. The ring sleeve shaft kiln of claim 5 wherein said drive blower system further comprises:
the air draft tube is arranged at the top of the shaft kiln body and is positioned above the inner kiln body;
and the driving fan is arranged outside the shaft kiln body and used for pumping gas in the shaft kiln body out of the air draft tube and circulating the gas to the ejector to be ejected.
7. The ring sleeve shaft kiln of claim 6 wherein said drive blower system further comprises:
the heat exchanger is arranged outside the shaft kiln body and is respectively communicated with the air draft tube and the ejector through pipelines, so that the air drawn out of the shaft kiln body is cooled and then circulates to the ejector to be ejected.
8. The ring sleeve type shaft kiln according to claim 1, wherein the top of the shaft kiln body is further communicated with a dust collector through a pipeline.
9. The method for calcining the co-fired lime in the annular shaft kiln is characterized by comprising the following steps of:
the materials move from top to bottom in the shaft kiln body and enter an annular cavity between the inner kiln body and the shaft kiln body for calcination, and the calcined materials pass through the bottom of the inner kiln body and are discharged after being cooled;
the ventilation in the shaft kiln body consists of two parts, wherein the main air volume is provided by a driving fan and forms driving air, the secondary air volume is sucked by an ejector at the bottom of the inner kiln body under negative pressure and forms negative pressure suction air, and the driving air and the negative pressure suction air are mixed and then are sprayed by the ejector to complete the ventilation;
the driving wind and the negative pressure suction wind are both hot wind.
10. The method for calcining ring-shaped shaft kiln co-fired lime according to claim 9,
the calcination of the material is divided into a preheating zone, a calcining zone, a post-positioned zone and a cooling zone from top to bottom; the temperature of the preheating zone is less than 850 ℃, the temperature of the calcining zone is 850-1100 ℃, the temperature of the post-positioned zone is 1100-650 ℃, and the temperature of the cooling zone is 650-60 ℃;
the preheating zone time is 3-8h, the calcining zone time is 2-5h, the post-zone time is 0.5-1h, and the cooling zone time is 1-3 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911366890.7A CN110981229A (en) | 2019-12-26 | 2019-12-26 | Annular sleeve type shaft kiln and method for calcining co-fired lime |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911366890.7A CN110981229A (en) | 2019-12-26 | 2019-12-26 | Annular sleeve type shaft kiln and method for calcining co-fired lime |
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| CN110981229A true CN110981229A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911366890.7A Pending CN110981229A (en) | 2019-12-26 | 2019-12-26 | Annular sleeve type shaft kiln and method for calcining co-fired lime |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556401A (en) * | 2020-12-09 | 2021-03-26 | 余松涛 | Rotary shaft kiln |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4740157A (en) * | 1985-05-29 | 1988-04-26 | Agrosa D D | Method of calcining solid materials and single column kiln therefor |
| CN2570273Y (en) * | 2002-08-13 | 2003-09-03 | 马敬甫 | Two-section type active lime shaft kiln with secondary deoxidation chamber |
| CN203284334U (en) * | 2013-03-07 | 2013-11-13 | 上海宝冶建设工业炉工程技术有限公司 | Energy-saving twin-tube vertical lime kiln |
| CN106986561A (en) * | 2017-05-17 | 2017-07-28 | 江苏中圣园科技股份有限公司 | Annular lime shaft kiln |
| CN211546342U (en) * | 2019-12-26 | 2020-09-22 | 余松涛 | Annular sleeve type shaft kiln |
-
2019
- 2019-12-26 CN CN201911366890.7A patent/CN110981229A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4740157A (en) * | 1985-05-29 | 1988-04-26 | Agrosa D D | Method of calcining solid materials and single column kiln therefor |
| CN2570273Y (en) * | 2002-08-13 | 2003-09-03 | 马敬甫 | Two-section type active lime shaft kiln with secondary deoxidation chamber |
| CN203284334U (en) * | 2013-03-07 | 2013-11-13 | 上海宝冶建设工业炉工程技术有限公司 | Energy-saving twin-tube vertical lime kiln |
| CN106986561A (en) * | 2017-05-17 | 2017-07-28 | 江苏中圣园科技股份有限公司 | Annular lime shaft kiln |
| CN211546342U (en) * | 2019-12-26 | 2020-09-22 | 余松涛 | Annular sleeve type shaft kiln |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556401A (en) * | 2020-12-09 | 2021-03-26 | 余松涛 | Rotary shaft kiln |
| CN112556401B (en) * | 2020-12-09 | 2024-03-22 | 余松涛 | Rotary shaft kiln |
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