CN109437608A - A kind of two-way wind built-in heat exchanger lime shaft kiln and its method for calcinating - Google Patents
A kind of two-way wind built-in heat exchanger lime shaft kiln and its method for calcinating Download PDFInfo
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- CN109437608A CN109437608A CN201811332745.2A CN201811332745A CN109437608A CN 109437608 A CN109437608 A CN 109437608A CN 201811332745 A CN201811332745 A CN 201811332745A CN 109437608 A CN109437608 A CN 109437608A
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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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Abstract
The invention discloses a kind of two-way wind built-in heat exchanger lime shaft kiln and its method for calcinating, the lime shaft kiln includes shaft furnace ontology (1), bottom wind wind seat (4), apoplexy wind seat (2), bottom wind blower (7), apoplexy blower (8), cross hollow beam (9), built-in heat exchanger (3), ash hoist (5), measuring chute (6), storage warehouse (10), and the shaft furnace ontology (1) is divided into feed zone (A), preheating zone (B), calcining zone (C), cooling zone (D) from top to bottom；It is intermediate above the cross hollow beam (9) that the apoplexy wind seat (2) is set, the built-in heat exchanger (3) are connected below；The bottom wind wind seat (4) is arranged in the lower part of the cooling zone (D), is connected to by pipeline with bottom wind blower (7)；Snorkel (31) in the built-in heat exchanger (3), lower end are connected to by pipeline with apoplexy blower (8), and the upper end is connected to apoplexy wind seat (2).
Description
Technical field
The invention belongs to lime calcining fields, and in particular to a kind of two-way wind built-in heat exchanger lime shaft kiln and its calcining side
Method.
Background technique
The thin block particle of powder of a large amount of 0~60mm is generated in limestone crushing screening production, 0~5mm is known as powder by us；
5~15mm is known as fine granules；15~30mm is known as cobbing, and 30~60mm is known as middle block pellet, currently, the thin lump lime stone object of powder
Material part is used for cement, sand processed, fills out the industries such as roadbed, construction material, mostly as solid waste in windrow composting, causes
Environmental pollution, especially high-grade fritter lime stone as waste material or for sand processed, fill out roadbed, cause to waste one's talent on a petty job, and
A kind of wasting of resources.
Some enterprises attempt small, middle lump lime stone being used for metallurgy, chemical industry by common shaft furnace lime calcining, by
Big in the small kiln internal resistance of particle, middle part improper ventilation when calcining causes material to generate in the edge " burning " of kiln at kiln center
" underburnt ", edge are oxidizing atmosphere, are reducing atmospheres in kiln, and when serious, due to kiln center anoxic, fuel generates not exclusively combustion
It burns, material to discharge outlet Oxygen Condition blazes up again when improving, causes to bring heat consumption while stove operating difficulties
It is high, operating environment is poor, low output, product quality are not able to satisfy requirement.Small, middle lump lime is fired using common shaft furnace, also
There are single kiln production capacity is not high, mostly in 100t/d hereinafter, high pressure drum can only be used since the kiln internal resistance of small, middle lump lime stone is big
Wind, so installed power is high, power consumption is also larger.
Once someone by plus " waist wind " and method attempt to solve the problems, such as, but " waist wind " or side wind, it is difficult to enter height temperate zone
Kiln in the middle part of, it is ineffective.
Summary of the invention
Goal of the invention: overcoming the shortcomings of common shaft furnace calcining performance, provide a kind of built-in heat exchange lime shaft kiln of two-way wind and
Its method for calcinating, improves ventilated environment inside shaft furnace, overcomes deficiency in draught of small, the middle lump lime stone in kiln, anoxic calcining
Disadvantage.
Technical solution: the present invention adopts the following technical scheme:
A kind of two-way wind built-in heat exchanger lime shaft kiln, including shaft furnace ontology, bottom wind wind seat, apoplexy wind seat, bottom wind blower,
Apoplexy blower, cross hollow beam, built-in heat exchanger, ash hoist, measuring chute, storage warehouse, the shaft furnace ontology are divided into from top to bottom
Feed zone, preheating zone, calcining zone, cooling zone, the cross hollow beam are erected at the intersection of calcining zone, cooling zone, rise and fix
Supporting role, top is intermediate to be arranged the apoplexy wind seat, connects the built-in heat exchanger below；The bottom wind wind seat is set
The lower part in the cooling zone is set, is connected to by pipeline with the bottom wind blower that shaft furnace body exterior is arranged in；The built-in heat exchange
Snorkel in device, lower end are connected to by pipeline with the apoplexy blower that shaft furnace body exterior is arranged in, and the upper end and setting exist
Apoplexy wind seat connection above cross hollow beam；The ash hoist, measuring chute, storage warehouse are successively set on the shaft furnace ontology
Lower section.
The feed zone includes material distributing machine, exhanst gas outlet, and raw limestone and anthracite fuel are from described in material distributing machine entrance
Shaft furnace ontology；The CO generated after lime calcining2Hot gas and hot fume are discharged from the exhanst gas outlet.
The ratio of height to diameter of the shaft furnace ontology is 4.5~6.5, and height of the apoplexy wind seat spacing from shaft furnace ontology bottom surface is institute
State the 1/3~1/4 of shaft furnace ontology whole height.
On the shaft furnace ontology at cross hollow beam position, it is additionally provided with airline pressure detection instrument, detects bottom
Wind reaches the real-time wind pressure in wind pressure and apoplexy wind seat herein, and by the pressure data measured feedback to being electrically connected therewith
Central control machine, the central control machine operate the pressure for requiring to adjust bottom wind blower and apoplexy blower further according to stove.
The bottom wind blower and apoplexy blower select high pressure from wind blower, and type selecting is according to drag evaluation and height above sea level
It is determined after amendment.
The total blast volume of the bottom wind blower and apoplexy blower is calculated according to fuel combustion formula.
The ash hoist lower part is equipped with measuring chute, for the weighing to finished product lime.
Preferably, the real-time wind pressure ratio bottom wind of the apoplexy wind seat outlet reaches the wind pressure at cross hollow beam sustained height
High 100~the 300Pa of absolute value.
Preferably, the bottom wind blower and apoplexy blower preferentially use roots blower.
Preferably, the air quantity of apoplexy blower accounts for the 30~40% of total blast volume.
Preferably, the material that the bottom wind seat is selected is Q235；The choosing of the material of the built-in heat exchanger and middle part wind seat
Use 310S.
Preferably, after built-in heat exchanger exchanges heat, outlet wind-warm syndrome >=550 DEG C of the apoplexy wind seat.
Equipment working principle: the air-supply all the way of common shaft furnace body bottom portion is changed to the air-supply of two tunnels, wherein bottom by the present invention
Wind wind seat outlet wind path is responsible for the ventilation of kiln edge, referred to as " bottom wind "；Another way is apoplexy wind seat outlet wind path, through built-in heat exchange
Device will be sent into the calcining zone after the air heating in apoplexy blower, also referred to as " apoplexy ", solve to return simultaneously in the middle part of kiln " anoxic "
The waste heat of cooling zone is received.
The invention also discloses a kind of method for calcinating of two-way wind built-in heat exchanger lime shaft kiln, comprising the following steps:
1, raw material and fuel prepare, feed:
By the anthracite grain of the fritter lime stone of 15~30mm and 5~10mm, or by the middle lump lime stone of 30~60mm with
The anthracite grain of 10~20mm, uniformly mixes after weighing, and is sent using Lifting Convey equipment to kiln top material distributing machine, rotates cloth and enters
Shaft furnace ontology；
2, blower blows, opens kiln igniting；Bottom wind blower and apoplexy blower and pipeline are respectively to bottom wind wind seat, built-in heat exchange
Device and apoplexy wind seat air feed, central control machine detect the pressure data that instrument transmits according to airline pressure and carry out pressure adjustment, make
Middle part wind seat outlet real-time wind pressure ratio bottom wind reach cross hollow beam sustained height at wind pressure absolute value it is high by 100~
300Pa reaches optimum value, opens kiln igniting；Open fire is uniform in kiln at this time, and the air velocity difference in border area and middle area greatly subtracts in kiln
It is few；
3, preheat, calcine: raw material and fuel burn in calcining zone, generate hot fume and CO2Hot gas, in air blast wind pressure and
It is moved upwards under the promotion of external air-introduced machine draft, the heat in flue gas and raw material and fuel carry out heat exchange, so that preheating zone
Interior raw material and fuel is preheated；
When raw material is lime stone cobbing, preheating time is 11.5~12h, and calcination time is 3.5~5.5h；
When raw material is block in lime stone, preheating time is 16~17h, and calcination time is 6.5~7h；
The temperature of preheating zone is 25~800 DEG C, and calcining zone edge-middle part-edge temperature is 800 DEG C -1200 DEG C -800
DEG C, the material movement speed that is averaged is about 1m/h in kiln.
4, it cooling, ash discharge: obtains carrying the lime finished product of amount of heat after calcining, drops into cooling zone, bottom wind wind seat
The cold wind of outlet directly cools down kiln border area, in the middle part of the cooling kiln of the built-in heat exchanger among the lower part of cooling zone；The built-in heat exchanger
Snorkel in apoplexy be heated obtaining heat, be sent to calcining zone lower part and help full combustion of fuel；At the same time, built-in
Heat exchanger cools the lime finished product in the middle part of cooling zone, and the ash discharge temperature of lime finished product is made to reach 50~70 DEG C；Lime finished product warp
After crossing ash hoist, measuring chute weighing, into storage warehouse.
Beneficial effects of the present invention: present invention is generally directed to existing common lime shaft furnaces to calcine 15~30mm lime stone fritter
Material, in 30~60mm lime stone block there are the problem of and design, it has the following advantages:
(1) simple process, occupied area are small, with low investment: than being obtained with rotary kiln production equipment calcining fritter process kiln is simple
More, rotary kiln generally takes up an area 10000 square metres or more, invests 1.6 thousand ten thousand yuan or more, and the present invention program takes up an area about 400 squares
Rice, investment are no more than 5,000,000 yuan, are the 1/3 of rotary kiln investment；
(2) production capacity is high: higher than common shaft furnace yield, common shaft furnace burns short grained maximum production about 100t/d, and product
Quality fluctuation is unstable；The technology of the present invention shaft furnace yield is up to 200t/d~400t/d, due to improving middle part oxygen deficit problem, kiln
Volume can increase, and firing period can also be accelerated, and efficiency of combustion is improved.
(3) product quality improves: common shaft furnace burns the life of fritter particle, burning rate is up to 20%, this technology < 8%, due to
Decomposition of limestone efficiency improves, CO in kiln gas2For concentration up to 35%, this recycles CO to trapping2Advantageously；
(4) energy-saving: the cooling effect of this technology is got well than traditional shaft furnace, the temperature of lime finished product after traditional shaft furnace is cooling
Generally 80~100 DEG C of degree, there are also open fire kiln discharges when serious, and the temperature of lime finished product is generally 50~70 after present invention cooling
℃；And the present invention guarantees fuel completely burned, waste heat makes full use of in the middle part of cooling zone, unit product heat consumption≤950 × 4.18KJ/
kg.CaO。
Detailed description of the invention
Fig. 1 is the structural schematic diagram (being not drawn into central control machine) of the built-in heat exchange lime shaft kiln of two-way wind of the present invention.
Description of symbols: 1, shaft furnace ontology, 2, apoplexy wind seat, 3, built-in heat exchanger, 31, snorkel, 4, bottom wind wind seat,
5, ash hoist, 6, measuring chute, 10, storage warehouse, 7, bottom wind blower, 8, apoplexy blower, 9, cross hollow beam, 91, airline pressure inspection
Survey instrument, A, feed zone, A1, material distributing machine, A2, exhanst gas outlet, B, preheating zone, C, calcining zone, D, cooling zone.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, right in the following with reference to the drawings and specific embodiments
The present invention is described in detail.
Such as the structural schematic diagram that Fig. 1 is two-way wind built-in heat exchanger lime shaft kiln of the invention.
A kind of two-way wind built-in heat exchanger lime shaft kiln, including shaft furnace ontology 1, bottom wind wind seat 4, apoplexy wind seat 2, Di Fengfeng
Machine 7, apoplexy blower 8, cross hollow beam 9, built-in heat exchanger 3, ash hoist 5, measuring chute 6, storage warehouse 10, the shaft furnace ontology 1
It is divided into feed zone A, preheating zone B, calcining zone C, cooling zone D from top to bottom, the cross hollow beam 9 is erected at calcining zone C, cooling
The intersection of area D, play fixed supporting role, and top is intermediate to be arranged the apoplexy wind seat 2, connects the built-in heat exchange below
Device 3；The lower part (under kiln at mouth) of the cooling zone D is arranged in the bottom wind wind seat 4, by pipeline and is arranged in shaft furnace ontology 1
External bottom wind blower 7 is connected to；Snorkel 31 in the built-in heat exchanger 3, lower end is by pipeline and is arranged in shaft furnace sheet
Apoplexy blower 8 outside body 1 is connected to, and the upper end is connected to the apoplexy wind seat 2 that 9 top of cross hollow beam is arranged in；The ash discharge
Machine 5, measuring chute 6, storage warehouse 10 are successively set on the lower section of the shaft furnace ontology 1.
The feed zone A includes material distributing machine A1, exhanst gas outlet A2, raw limestone and anthracite fuel from material distributing machine A1 into
Enter the shaft furnace ontology 1；The CO generated after lime calcining2Hot gas and hot fume are discharged from the exhanst gas outlet A2.
The ratio of height to diameter of the shaft furnace ontology 1 is 4.5~6.5, and height of the apoplexy wind seat spacing from 1 bottom surface of shaft furnace ontology is
The 1/3~1/4 of the shaft furnace ontology whole height.
On the shaft furnace ontology 1 at 9 position of cross hollow beam, it is additionally provided with airline pressure detection instrument 91, inspection
It surveys bottom wind and reaches the wind pressure at 9 sustained height of cross hollow beam and the real-time wind pressure of the outlet of apoplexy wind seat 2, and the pressure that will be measured
Data feedback is to the central control machine being electrically connected therewith, and the central control machine is further according to technique requirement regulation bottom wind blower 7
With the pressure of apoplexy blower 8.
The bottom wind blower 7 and apoplexy blower 8 select high pressure from wind blower, and type selecting is according to drag evaluation and height above sea level
It is determined after degree amendment.
The total blast volume of the bottom wind blower 7 and apoplexy blower 8 is calculated according to by the burning formula of fuel type.
5 lower part of ash hoist is equipped with measuring chute 6, for the weighing to finished product lime.
Preferably, the real-time wind pressure ratio bottom wind that the apoplexy wind seat 2 exports reaches the wind at 9 sustained height of cross hollow beam
Press the high 100~300Pa of absolute value.
Preferably, the bottom wind blower 7 and apoplexy blower 8 preferentially use roots blower.
Preferably, the air quantity of apoplexy blower 8 accounts for the 30~40% of total blast volume.
Preferably, the material that the bottom wind wind seat 4 is selected is Q235；The material of the built-in heat exchanger 3 and apoplexy wind seat 2
Select 310S.
Preferably, after the heat exchange of built-in heat exchanger 3, the apoplexy wind seat 2 exports wind-warm syndrome >=550 DEG C.
Equipment working principle: the air-supply all the way of common shaft furnace body bottom portion is changed to the air-supply of two tunnels, wherein bottom by the present invention
Wind wind seat 4 exports wind path, is responsible for the ventilation of kiln edge, referred to as " bottom wind "；Another way be apoplexy wind seat 2 export wind path, warp built in
Heat exchanger 3 will be sent into the calcining zone C, also referred to as " apoplexy " after the air heating in apoplexy blower 8, solve in the middle part of kiln " anoxic "
The waste heat of cooling zone D has been recycled simultaneously.
The invention also discloses a kind of method for calcinating of two-way wind built-in heat exchanger lime shaft kiln, comprising the following steps:
1, raw material and fuel prepare, feed: by the anthracite grain of the fritter lime stone of 15~30mm and 5~10mm, or will
The middle lump lime stone of 30~60mm and the anthracite grain of 10~20mm, are uniformly mixed after weighing, are sent using Lifting Convey equipment
To kiln top material distributing machine A1, rotates cloth and enter shaft furnace ontology 1；
2, blower blows, opens kiln igniting；Bottom wind blower 7 and apoplexy blower 8 are by pipeline respectively to bottom wind wind seat 4, built-in
2 air feed of heat exchanger 3 and apoplexy wind seat, central control machine detect the pressure data that instrument 9 transmits according to airline pressure and carry out pressure
Adjustment, so that the real-time wind pressure ratio bottom wind that apoplexy wind seat 2 exports reaches at the rood beam 4 high 100~300Pa of wind pressure absolute value,
Reach optimum value, opens kiln igniting；Open fire is uniform in kiln at this time, and the air velocity difference in border area and middle area is greatly reduced in kiln；
3, preheat, calcine: raw material and fuel burn in calcining zone C, generate hot fume and CO2Hot gas, in air blast wind pressure
Draft with external air-introduced machine moves upwards under pushing, and the heat in flue gas and raw material and fuel carry out heat exchange, enters
Raw material and fuel in the B of portion preheating zone are preheated；
When raw material is lime stone cobbing, preheating time is 11.5~12h, and calcination time is 3.5~5.5h；
When raw material is block in lime stone, preheating time is 16~17h, and calcination time is 6.5~7h；
The temperature of preheating zone B be 25~800 DEG C, calcining zone C edge-middle part-edge temperature be 800 DEG C -1200 DEG C -
800 DEG C, the material movement speed that is averaged is about 1m/h in kiln.
4, it cooling, ash discharge: obtains carrying the lime finished product of amount of heat after calcining, drops into cooling zone D, bottom wind wind seat
The cold wind of 4 outlets directly cools down kiln border area, in the middle part of the cooling kiln of the built-in heat exchanger 3 among the lower part D of cooling zone；The built-in heat exchange
Apoplexy in the snorkel 31 of device 3 is heated obtaining heat, is sent to the lower part calcining zone C and is helped full combustion of fuel；It is same with this
When, built-in heat exchanger 3 cools the lime finished product in the middle part of the D of cooling zone, and the ash discharge temperature of lime finished product is made to reach 50~70 DEG C；Stone
Grey finished product is after ash hoist 5, the metering weighing of measuring chute 6, into storage warehouse 10.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail.It should be pointed out that the above is only the preferred embodiment of the present invention, it is not intended to limit the scope of protection of the present invention,
For a person skilled in the art, without departing from the structure of the invention, several modifications and improvements can also be made,
These improvement also should be regarded as protection scope of the present invention, these all will not influence the practical of the effect implemented and patent of the invention
Property.
Claims (10)
1. a kind of two-way wind built-in heat exchanger lime shaft kiln, which is characterized in that including shaft furnace ontology (1), bottom wind wind seat (4), in
Wind wind seat (2), bottom wind blower (7), apoplexy blower (8), cross hollow beam (9), built-in heat exchanger (3), ash hoist (5), metering
Storehouse (6), storage warehouse (10), the shaft furnace ontology (1) are divided into feed zone (A), preheating zone (B), calcining zone (C), cold from top to bottom
But area (D), the cross hollow beam (9) is erected at the intersection of calcining zone (C), cooling zone (D), among top described in setting
Apoplexy wind seat (2) connects the built-in heat exchanger (3) below；The bottom wind wind seat (4) is arranged at the cooling zone (D)
Lower part is connected to setting in the external bottom wind blower (7) of shaft furnace ontology (1) by pipeline；It is logical in the built-in heat exchanger (3)
Tracheae (31), lower end are connected to setting in the external apoplexy blower (8) of shaft furnace ontology (1) by pipeline, the upper end and setting
Apoplexy wind seat (2) connection above cross hollow beam (9)；The ash hoist (5), measuring chute (6), storage warehouse (10) are successively set
It sets in the lower section of the shaft furnace ontology (1).
2. two-way wind built-in heat exchanger lime shaft kiln according to claim 1, which is characterized in that feed zone (A) packet
It includes material distributing machine (A1), exhanst gas outlet (A2), raw limestone and anthracite fuel and enters the shaft furnace ontology from material distributing machine (A1)
(1)；The CO generated after lime calcining2Hot gas and hot fume are discharged from the exhanst gas outlet (A2).
3. two-way wind built-in heat exchanger lime shaft kiln according to claim 1, which is characterized in that the shaft furnace ontology (1)
Ratio of height to diameter be 4.5~6.5, height of the apoplexy wind seat spacing from shaft furnace ontology (1) bottom surface is that the shaft furnace ontology is whole high
The 1/3~1/4 of degree.
4. two-way wind built-in heat exchanger lime shaft kiln according to claim 1, which is characterized in that in the shaft furnace ontology
(1) at cross hollow beam (9) position, it is additionally provided with airline pressure detection instrument (91), it is empty that detection bottom wind reaches cross
The real-time wind pressure of wind pressure at heart beam (9) equal height and apoplexy wind seat (2) outlet, and by the pressure data measured feedback to
The central control machine being electrically connected, the central control machine requires regulation bottom wind blower (7) and apoplexy blower further according to technique
(8) pressure.
5. two-way wind built-in heat exchanger lime shaft kiln according to claim 1, which is characterized in that the bottom wind blower (7)
It is determined after selecting high pressure blower, type selecting to be corrected according to drag evaluation and height above sea level with apoplexy blower (8)；The bottom wind wind
The total blast volume of machine (7) and apoplexy blower (8) is calculated according to by the burning formula of fuel type, the air quantity of apoplexy blower (8)
Account for the 30~40% of total blast volume.
6. two-way wind built-in heat exchanger lime shaft kiln according to claim 1, which is characterized in that under the ash hoist (5)
Portion is equipped with measuring chute (6), for the weighing to finished product lime.
7. two-way wind built-in heat exchanger lime shaft kiln according to claim 4, which is characterized in that apoplexy wind seat (2) outlet
Real-time wind pressure ratio bottom wind reach cross hollow beam (9) sustained height at the high 100~300Pa of wind pressure absolute value；Through described interior
After setting heat exchanger (3) heat exchange, the apoplexy wind seat (2) exports wind-warm syndrome >=550 DEG C.
8. two-way wind built-in heat exchanger lime shaft kiln according to claim 5, which is characterized in that the bottom wind blower (7)
High pressure is all made of from wind blower with apoplexy blower (8)；The material that the bottom wind wind seat (4) is selected is Q235；The built-in heat exchange
The material selection 310S of device (3) and apoplexy wind seat (2).
9. a kind of method for calcinating of two-way wind built-in heat exchanger lime shaft kiln, which comprises the following steps:
1) raw material and fuel prepare, charging: by the anthracite grain of the fritter lime stone of 15~30mm and 5~10mm, or by 30~
The middle lump lime stone of 60mm and the anthracite grain of 10~20mm, are uniformly mixed after weighing, are sent using Lifting Convey equipment to kiln
It pushes up material distributing machine (A1), rotation cloth enters shaft furnace ontology (1)；
2) blower blows, opens kiln igniting；Bottom wind blower (7) and apoplexy blower (8) are by pipeline respectively to bottom wind wind seat (4), interior
Heat exchanger (3) and apoplexy wind seat (2) air feed are set, central control machine detects the pressure data that instrument (9) are transmitted according to airline pressure
Pressure adjustment is carried out, so that the real-time wind pressure ratio bottom wind of middle part wind seat (2) outlet reaches at cross hollow beam (9) sustained height
High 100~the 300Pa of wind pressure absolute value, reaches optimum value, can open kiln igniting；
3) preheat, calcine: raw material and fuel burn at calcining zone (C), generate hot fume and CO2Hot gas, in air blast wind pressure and outside
It is moved upwards under the promotion of portion's air-introduced machine, the heat in flue gas and raw material and fuel carry out heat exchange, enter top preheating zone
(B) raw material and fuel in are preheated；The temperature of preheating zone (B) is 25~800 DEG C, calcining zone (C) edge-middle part-edge
Temperature be 800 DEG C -1200 DEG C -800 DEG C；
4) it cooling, ash discharge: obtains carrying the lime finished product of amount of heat after calcining, drops into cooling zone (D), bottom wind wind seat
(4) cold wind exported directly cools down kiln border area, in the middle part of the cooling kiln of the built-in heat exchanger (3) among the lower part cooling zone (D)；In described
It sets apoplexy in the snorkel (31) of heat exchanger (3) and is heated obtaining heat, be sent to the calcining zone lower part (C) and help fuel abundant
Burning；At the same time, built-in heat exchanger (3) cools the lime finished product in the middle part of cooling zone (D), makes the ash discharge temperature of lime finished product
Reach 50~70 DEG C；Lime finished product is after ash hoist (5), measuring chute (6) metering weighing, into storage warehouse (10).
10. the method for calcinating of two-way wind built-in heat exchanger lime shaft kiln according to claim 9, which is characterized in that in step
It is rapid 3) in, when raw material be lime stone cobbing when, preheating time be 11.5~12h, calcination time be 3.5~5.5h；Work as original
When material is block in lime stone, preheating time is about 16~17h, and calcination time is about 6.5~7h.
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| CN201811332745.2A CN109437608B (en) | 2018-11-09 | 2018-11-09 | Double-path air built-in heat exchanger lime shaft kiln and calcining method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110835238A (en) * | 2019-10-26 | 2020-02-25 | 石家庄奋进科技有限公司 | Volume-weight type sealing ash discharging machine |
| CN112556401A (en) * | 2020-12-09 | 2021-03-26 | 余松涛 | Rotary shaft kiln |
| WO2022238387A1 (en) * | 2021-05-11 | 2022-11-17 | Tecforlime | Decarbonation process of carbonated materials in a multi-shaft vertical kiln |
| WO2022238385A1 (en) * | 2021-05-11 | 2022-11-17 | Tecforlime | Decarbonation process of carbonated materials in a multi-shaft vertical kiln |
| CN116199435A (en) * | 2023-05-04 | 2023-06-02 | 北京瑞尔非金属材料有限公司 | Calcining limestone and recovering CO 2 Is a method of (2) |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110835238A (en) * | 2019-10-26 | 2020-02-25 | 石家庄奋进科技有限公司 | Volume-weight type sealing ash discharging machine |
| 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 |
| WO2022238387A1 (en) * | 2021-05-11 | 2022-11-17 | Tecforlime | Decarbonation process of carbonated materials in a multi-shaft vertical kiln |
| WO2022238385A1 (en) * | 2021-05-11 | 2022-11-17 | Tecforlime | Decarbonation process of carbonated materials in a multi-shaft vertical kiln |
| CN116199435A (en) * | 2023-05-04 | 2023-06-02 | 北京瑞尔非金属材料有限公司 | Calcining limestone and recovering CO 2 Is a method of (2) |
| CN116199435B (en) * | 2023-05-04 | 2023-06-27 | 北京瑞尔非金属材料有限公司 | Calcining limestone and recovering CO 2 Is a method of (2) |
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