CN208869325U - A kind of furnace atmosphere circulation formula lime stone muffle calcination system - Google Patents
A kind of furnace atmosphere circulation formula lime stone muffle calcination system Download PDFInfo
- Publication number
- CN208869325U CN208869325U CN201821340402.6U CN201821340402U CN208869325U CN 208869325 U CN208869325 U CN 208869325U CN 201821340402 U CN201821340402 U CN 201821340402U CN 208869325 U CN208869325 U CN 208869325U
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- China
- Prior art keywords
- gas
- lime stone
- combustion chamber
- furnace
- lime
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000001354 calcination Methods 0.000 title claims abstract description 47
- 239000006028 limestone Substances 0.000 title claims abstract description 33
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 25
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 14
- 239000001569 carbon dioxide Substances 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 23
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 23
- 239000004571 lime Substances 0.000 abstract description 23
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 210000000952 spleen Anatomy 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 37
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 19
- 239000003546 flue gas Substances 0.000 description 19
- 229960004424 carbon dioxide Drugs 0.000 description 11
- 239000000446 fuel Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 235000011089 carbon dioxide Nutrition 0.000 description 3
- 239000005431 greenhouse gas Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
The utility model discloses a kind of furnace atmosphere circulation formula lime stone muffle calcination systems, belong to technical field of lime production.It includes the circulatory system and heating system, the circulatory system includes cryogenic heat exchanger, high-temperature heat-exchanging and the calcining furnace for constituting loop, the road of working off one's feeling vent one's spleen of calcining furnace is connected with gas exhaust piping by triple valve, injector is additionally provided in circulatory system loop, injector is connected with driving blower；Heating system includes combustion chamber and the air preheater being connected respectively with combustion chamber, gas preheater and regenerator, the outlet of combustion chamber is sequentially connected to the dielectric cavity of high-temperature heat-exchanging, cryogenic heat exchanger, air preheater and gas preheater by pipeline, and the dielectric cavity of regenerator is connected in the gas exhaust piping.The design of the utility model calcination system is very ingenious, can be improved the quality of lime product, and is attached to production CO2, bring new economic benefit.Meanwhile the heat utilization efficiency of this system is higher, has the characteristics that environmental protection and energy saving, is convenient for marketing, has broad application prospects.
Description
Technical field
The utility model belongs to technical field of lime production, particularly relates to a kind of furnace atmosphere circulation formula lime stone muffle calcining system
System.
Background technique
It is obtained currently, industry and civilian lime mainly pass through lime stone and calcine in limekiln.The master that this method uses
Wanting equipment is limekiln, is divided into four temperature band in limekiln, is storing band, preheating zone, burning zone and cooling zone, core respectively
Heart district is burning zone.Burner noz(zle) is distributed in burning zone, by these Jet control industrial gas, natural gas, fuel oil or
The burning of coal dust, is distributed even flame.The high-temperature flue gas that burning generates directly is contacted with lime stone, heating lime stone to 900
After DEG C, CO2Start to be precipitated from lime stone, the CO by the calcining of certain time, inside lime stone2After being precipitated completely, calcine
At.
The characteristics of this calcining manners is that the burn high-temperature flue gas of generation is directly contacted with lime stone, heat transfer efficiency
It is high.But the problem of existing simultaneously is, the harmful substance that different fuel burning generates will affect the quality of lime, such as H2O、SO2, charcoal
Black, NOxEtc..In addition, these harmful substances can also contact simultaneously with the lime stone (main component is calcium oxide) calcined in kiln
It chemically reacts, generates non-lime substance (e.g., CaSO4), to influence the overall quality of lime.Therefore, it is connect using flame
The lime that touch is sintered into, generally will be to the processing of blocky lime sur-face peeling just when producing medical or food-grade calcium carbonate
It can use, and can only manually remove.
As it can be seen that existing lime calcining mode had not only polluted environment but also had caused the very big wasting of resources and energy waste, simultaneously
Lime surface impurity residual is uncontrollable, directly affects medical or food-grade calcium carbonate quality.Application No. is 2014102641325
Chinese patent disclose " a kind of muffle calcination lime burner ", the limekiln using muffle mode to lime stone carry out heating forge
It burns, it can be with the quality of effective guarantee lime.But the utilization efficiency of heat energy in the limekiln is lower, the waste heat being emitted into atmosphere
More, there is also biggish rooms for improvement.
Utility model content
In view of the above problems, the utility model proposes a kind of furnace atmosphere circulation formula lime stone muffle calcination system, which is adopted
With multi-stage heat exchanger mode, and furnace atmosphere circulation is run, can be improved the utilization efficiency of thermal energy.
In order to achieve the above purposes, the technical solution adopted by the utility model is:
A kind of furnace atmosphere circulation formula lime stone muffle calcination system comprising the circulatory system and heating system, the cyclic system
System includes the cryogenic heat exchanger, high-temperature heat-exchanging and calcining furnace for being sequentially connected with and constituting loop, the outlet gas circuit of the calcining furnace
It is upper that gas exhaust piping is connected with by triple valve, the injector for driving gas to recycle is additionally provided in the circulatory system loop,
The injector is connected with driving blower；The heating system includes that combustion chamber and the air being connected respectively with combustion chamber are pre-
Hot device, gas preheater and regenerator, the outlet of the combustion chamber by pipeline sequentially with high-temperature heat-exchanging, cryogenic heat exchanger,
Air preheater is connected to the dielectric cavity of gas preheater, and the dielectric cavity of the regenerator is connected in the gas exhaust piping.
Optionally, the first dust-extraction unit and first positioned at the regenerator downstream is also arranged in sequence in the gas exhaust piping
Carbon dioxide capture device.
Optionally, the downstream of the gas preheater dielectric cavity also passes through pipeline the second dust-extraction unit and second is arranged in sequence
Carbon dioxide capture device.
It optionally, further include control module, the triple valve is electrically-controlled valve, and the calcining furnace is equipped with pressure sensor,
The control module is connect with triple valve and pressure sensor respectively.
Beneficial effect by adopting the above technical scheme is:
1, the utility model devises two sets of air-channel systems, all the way to include the circulatory system including calcining furnace, another way
For the heating system for generating heat by burning, two systems are isolated from each other, and are passed heat from heating system by heat exchange mode
Pass the circulatory system.This calcination system can effectively avoid combustion product gases from contacting with the direct of lime stone, to prevent lime
Stone generates non-lime substance in calcination process, and then promotes the quality of lime.
2, the utility model, which is provided with many places heat exchange facilities, can sufficiently recycle whole system using multi-stage heat exchanger mode
In waste heat, avoid energy waste and waste heat from polluting, the design of entire calcination system is very ingenious, has energy-saving and environment-friendly spy
Point.
3, the utility model uses two sets of air-channel systems, thus high-purity CO that calcining is generated2The flue gas generated with burning
Keep apart.Meanwhile the gas in the circulatory system can make CO by iterative cycles2Reach high concentration, to be conducive to
To CO2Recycling.The CO of recycling2It can be used as the raw material of junior's industry, therefore, this system not only contributes to reduce greenhouse gases
Discharge, can also create additional economic benefit.
In short, the design of the utility model calcination system is very ingenious, the quality of lime product can be improved, and be attached to life
Produce CO2, bring new economic benefit.Meanwhile the heat utilization efficiency of this system is higher, has the characteristics that environmental protection and energy saving, is convenient for market
It promotes, has broad application prospects.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of furnace atmosphere circulation formula lime stone muffle calcination system in the utility model embodiment.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described further the utility model.
As shown in Figure 1, a kind of furnace atmosphere circulation formula lime stone muffle calcination system comprising the circulatory system and heating system,
The circulatory system includes the cryogenic heat exchanger, high-temperature heat-exchanging and calcining furnace for being sequentially connected with and constituting loop, the calcining furnace
Road of working off one's feeling vent one's spleen gas exhaust piping is connected with by triple valve, be additionally provided in the circulatory system loop for driving gas to recycle
Injector, the injector is connected with driving blower；The heating system includes combustion chamber and is connected respectively with combustion chamber
Air preheater, gas preheater and the regenerator connect, the outlet of the combustion chamber by pipeline sequentially with high-temperature heat-exchanging, low
Warm heat exchanger, air preheater are connected to the dielectric cavity of gas preheater, and the dielectric cavity of the regenerator is connected to the exhaust
In pipeline.
In the system, injector may be provided at the inlet of cryogenic heat exchanger, may also be arranged on the entrance of high-temperature heat-exchanging
Place, this depends on the temperature of used driving blower blow gas.
Calcining furnace can use existing Conventional calcination furnace, but usage mode is unlike the prior art.It is in the prior art
Directly fuel gas is sent into calcining furnace, and is burnt in calcining furnace.This system then utilizes the original gas circuit entrance of calcining furnace
The recyclegas of high temperature is sent into, is not burnt in furnace.
Cryogenic heat exchanger, high-temperature heat-exchanging, air preheater, gas preheater and regenerator in the system are heat exchange
Device can select in the prior art suitable type directly to use, can also be customized as needed.
Optionally, still see Fig. 1, the first dedusting dress positioned at the regenerator downstream is also arranged in sequence in the gas exhaust piping
It sets and the first carbon dioxide capture device.
Optionally, still see Fig. 1, the downstream of the gas preheater dielectric cavity also passes through pipeline and the second dedusting dress is arranged in sequence
It sets and the second carbon dioxide capture device.
It optionally, further include control module, the triple valve is electrically-controlled valve, and the calcining furnace is equipped with pressure sensor,
The control module is connect with triple valve and pressure sensor respectively；The control module is used in calcining furnace pressure be more than to set
Gas exhaust piping is opened by triple valve when definite value, excessive gas is discharged to maintain the balance of furnace gas and ensures gas
Normal circulation.The control target of control module is as previously mentioned, the specific implementation of control algolithm is those skilled in the art
Common knowledge, details are not described herein again.
The working principle of the utility model is as follows:
Lime stone is calcined in calcining furnace, and the exhaust gas of generation is discharged out of furnace.The exhaust gas of discharge is divided into two parts: one
Part is exhaust, and another part is circulating air.
Exhaust recycles heat by regenerator, using bag filter dedusting, finally by Collecting carbonic anhydride device
After trapping, residual gas is discharged into atmosphere.
Circulating air first passes around cryogenic heat exchanger, and the temperature of circulating air is promoted to 300~400 DEG C, high temperature is entered back into and changes
Its temperature is promoted to 1100 DEG C or so, finally enters in calcining furnace, directly heat lime stone by hot device.
The heat source of entire calciner plant is an independent combustion chamber, and combustion chamber needs to input combustion air, main air
And fuel.Wherein, combustion air is heated by regenerator, thus the heat of recovery of circulatory system discharge exhaust gas；Main combustion is empty
Gas is heated by air preheater, to recycle a part of heat of heating system discharge flue gas；Fuel is pre- by combustion gas
Hot device continues to heat, thus a part of heat of recycling heating system discharge flue gas.
Enter in combustion chamber after the above three parts gas preheating and burn, 1300 DEG C or so high-temperature flue gas of generation initially enter
High-temperature heat-exchanging enters back into cryogenic heat exchanger.700 DEG C or so are cooled to after high-temperature flue gas and circulating air heat exchange, enters back into air
Preheater and main air exchange heat, and temperature is down to 400 DEG C or so.Finally, flue gas enters gas preheater, dropped after exchanging heat with fuel
Down to 150 DEG C or so.Low-temperature flue gas is discharged into atmosphere using smoke duster and Collecting carbonic anhydride device, last residual gas.
The high-temperature flue gas heat cycles gas that this furnace atmosphere circulation formula lime stone muffle calcination system is generated by burning, then by
The flue gas that burning generates is isolated with lime stone, efficiently avoids the harmful components in flue gas by circulating air heating lime stone
Pollution to lime improves the purity of lime.In addition, the system is additionally provided with Collecting carbonic anhydride device, all discharges are trapped
Carbon dioxide in gas reduces carbon emission.Multiple heat exchangers in system can also sufficiently recycle the heat in exhaust and flue gas
Amount, improves capacity usage ratio, reduces environmental pollution.
Lime stone is during production, and the form and chemical component of fuel are not fixed very much and relative complex, the cigarette for generation of burning
Gas ingredient has many uncertain factors, in the flue gas impurity that the production method of conventional lime kiln generates burning with regard to inevitable
It is mixed into lime finished product, causes " pollution " of finished product lime.This furnace atmosphere circulation formula lime stone muffle calcination system during production,
The flue gas that fuel combustion generates transfers heat to the circulatory system by heat exchange equipment, and heat is supplied lime stone again by the circulatory system
Reaction, i.e., the flue gas of fuel combustion does not contact directly with production material directly, this has just prevented band due to fuel impurity problem
The pollution come provides a kind of more reliable method for production high-purity lime.
In this furnace atmosphere circulation formula lime stone muffle calcination system, limestone calcination during institute's calorific requirement from low temperature,
Heat is only passed to the circulatory system from combustion chamber high temperature flue gas by high-temperature heat exchanger, exchanger.Therefore the cyclic system of this system
There is no flue gas (flue gas after combustion chambers burn) ingredient, the only carbon dioxide of lime stone reaction generation in the exhaust gas of system discharge.
Meanwhile the iterative cycles of recyclegas make gas concentration lwevel therein quite high, in this way, the exhaust gas of discharge is due to its dioxy
It is higher to change carbon purity, thus can be by relatively easy and utilize again at low cost.Also, it reasonably collects and utilizes this part
Carbon dioxide can also reduce the discharge of greenhouse gases.As it can be seen that this system is a kind of very environmentally friendly production facility, it is not only able to
Reduce the discharge of greenhouse gases, additionally it is possible to provide more good raw material for next stage industry (deep processing of carbon dioxide), create
Make additional economic benefit.
In short, the design of the utility model calcination system is very ingenious, the quality of lime product can be improved, and be attached to life
Produce CO2, bring new economic benefit.Meanwhile the heat utilization efficiency of this system is higher, has the characteristics that environmental protection and energy saving, is convenient for market
It promotes, has broad application prospects.
It should be pointed out that the above specific embodiment is the specific case of this patent implementation, without also can not
All implementations of this patent can be covered, therefore the restriction to the scope of this patent cannot be regarded as；All and above case
Belong to the implementation of same idea or the assembled scheme of above-mentioned several schemes, within the protection domain of this patent..
Claims (4)
1. a kind of furnace atmosphere circulation formula lime stone muffle calcination system, it is characterised in that: described including the circulatory system and heating system
The circulatory system includes the cryogenic heat exchanger, high-temperature heat-exchanging and calcining furnace for being sequentially connected with and constituting loop, and the calcining furnace goes out
Implication road passes through triple valve and is connected with gas exhaust piping, and the spray for driving gas to recycle is additionally provided in the circulatory system loop
Emitter, the injector are connected with driving blower；The heating system includes combustion chamber and is connected respectively with combustion chamber
The outlet of air preheater, gas preheater and regenerator, the combustion chamber is sequentially changed with high-temperature heat-exchanging, low temperature by pipeline
Hot device, air preheater are connected to the dielectric cavity of gas preheater, and the dielectric cavity of the regenerator is connected to the gas exhaust piping
In.
2. furnace atmosphere circulation formula lime stone muffle calcination system according to claim 1, it is characterised in that: the gas exhaust piping
In the first dust-extraction unit and the first carbon dioxide capture device positioned at the regenerator downstream is also arranged in sequence.
3. furnace atmosphere circulation formula lime stone muffle calcination system according to claim 1, it is characterised in that: the gas-preheating
The downstream of device dielectric cavity also passes through pipeline and the second dust-extraction unit and the second carbon dioxide capture device is arranged in sequence.
4. furnace atmosphere circulation formula lime stone muffle calcination system according to claim 1, it is characterised in that: further include control mould
Block, the triple valve be electrically-controlled valve, the calcining furnace be equipped with pressure sensor, the control module respectively with triple valve and pressure
Force snesor connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821340402.6U CN208869325U (en) | 2018-08-20 | 2018-08-20 | A kind of furnace atmosphere circulation formula lime stone muffle calcination system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821340402.6U CN208869325U (en) | 2018-08-20 | 2018-08-20 | A kind of furnace atmosphere circulation formula lime stone muffle calcination system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208869325U true CN208869325U (en) | 2019-05-17 |
Family
ID=66465088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821340402.6U Withdrawn - After Issue CN208869325U (en) | 2018-08-20 | 2018-08-20 | A kind of furnace atmosphere circulation formula lime stone muffle calcination system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208869325U (en) |
-
2018
- 2018-08-20 CN CN201821340402.6U patent/CN208869325U/en not_active Withdrawn - After Issue
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190517 Effective date of abandoning: 20240223 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190517 Effective date of abandoning: 20240223 |