CN108317864A - A kind of cement kiln depth waste heat recovery collaboration refuse burning system - Google Patents
A kind of cement kiln depth waste heat recovery collaboration refuse burning system Download PDFInfo
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- CN108317864A CN108317864A CN201810239896.7A CN201810239896A CN108317864A CN 108317864 A CN108317864 A CN 108317864A CN 201810239896 A CN201810239896 A CN 201810239896A CN 108317864 A CN108317864 A CN 108317864A
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- Prior art keywords
- air
- valve
- refuse burning
- bypass
- waste heat
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- 239000004568 cement Substances 0.000 title claims abstract description 63
- 239000002918 waste heat Substances 0.000 title claims abstract description 43
- 238000011084 recovery Methods 0.000 title claims abstract description 27
- 238000000605 extraction Methods 0.000 claims abstract description 32
- 238000004056 waste incineration Methods 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 230000001172 regenerating effect Effects 0.000 claims description 20
- 230000000740 bleeding effect Effects 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 9
- 239000008246 gaseous mixture Substances 0.000 claims description 7
- 230000001939 inductive effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 25
- 230000005611 electricity Effects 0.000 abstract description 20
- 239000002699 waste material Substances 0.000 abstract description 19
- 238000010248 power generation Methods 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000004575 stone Substances 0.000 abstract description 4
- 239000010813 municipal solid waste Substances 0.000 description 28
- 239000012716 precipitator Substances 0.000 description 11
- 239000000428 dust Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 239000000284 extract Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 241000209202 Bromus secalinus Species 0.000 description 3
- 241000370738 Chlorion Species 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/002—Incineration of waste; Incinerator constructions; Details, accessories or control therefor characterised by their grates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/006—General arrangement of incineration plant, e.g. flow sheets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2203/00—Furnace arrangements
- F23G2203/10—Stoker grate furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2203/00—Furnace arrangements
- F23G2203/50—Fluidised bed furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2900/00—Special features of, or arrangements for incinerators
- F23G2900/50213—Preheating processes other than drying or pyrolysis
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a kind of cement kiln depth waste heat recoveries to cooperate with refuse burning system, belong to manufacture of cement waste heat recovery and technical field of waste incineration, including kiln hood residual neat recovering system, rotary kiln residual neat recovering system, bypass system and refuse burning system, kiln hood residual neat recovering system includes grate-cooler, first dust-extraction unit, waste heat boiler, second dust-extraction unit, blower unit and connecting pipe, rotary kiln residual neat recovering system includes air-supply arrangement, air heating apparatus and connecting pipe, bypass system includes third dust-extraction unit and connecting pipe, refuse burning system includes incinerator, a wind pipe and First air air preheater, secondary air duct and air preheater of secondary air.The present invention effectively reduces energy waste present in waste incineration and generating electricity and cement industry, and manufacture of cement operational efficiency is improved while effectively improving the overall power generation efficiency of waste incineration and generating electricity with killing two birds with one stone, reduces operation energy consumption.
Description
Technical field
The invention belongs to manufacture of cement waste heat recovery and technical field of waste incineration, and in particular to more than a kind of cement kiln depth
Recuperation of heat cooperates with refuse burning system.
Background technology
In recent years, urban garbage disposal has become worldwide social concern, is one very arduous
Comprehensive, systemic engineering.Currently, many countries, especially some advanced countries in the world, to the place of domestic waste
Reason uses heat treating process, and what heat treating process was currently mainly used is burning method, and the rubbish that countries in the world generally use at present
Processing method has the characteristics that treating capacity is big, volume reduction is good and has thermal energy recycling.
Refuse incineration and power generation journey is more and more in China, the problem of alleviating some refuse pollutions.But garbage power
The flying dust harmful components of factory are high, belong to dangerous waste one kind, it is necessary to pass through stringent technical finesse, it is this usually by landfill disposal
The flying dust of landfill still has the danger of pollution environment and occupies part place.The stove of the waste incinerator discharge of refuse-burning plant
Slag generally uses burying method to handle, due in garbage slag there are harmful components such as heavy metals, this method there are still
The lime-ash of the refuse-burning plant landfill of some countries such as danger of environmental pollution, such as Japan occurs polluting the accident of environment,
There are some landfill yards that will fill after lime-ash digs up and has been sent into cement rotary kiln incineration disposal.
Waste incineration and generating electricity has the characteristics that garbage treatment quantity is big, volume reduction is good, additionally it is possible to convert the thermal energy of rubbish to electricity
Energy.Clinker and flying dust are sent into cement production system produced by burning so that soot object is handled well.In addition, cement
Production system is power consumption rich and influential family, and waste incineration electricity will be directly used in cement production system, and it is outside both to have reduced rubbish electricity
The waste of electric energy and the investment construction of transmission facility in electricity transmission process caused by conveying, and solve the need of a large amount of power consumptions in cement plant
It asks.Therefore, refuse incineration and power generation journey and cement works collaborative building are a kind of feasible methods of operation.
But current refuse incineration and power generation journey is with cement works collaborative building still in research and trial stage, waste incineration
There are energy waste in power generation and cement industry, there is the overall power generation efficiency of waste incineration and generating electricity is low, manufacture of cement fortune
Line efficiency is low and problem that operation energy consumption is high.
Invention content
It is an object of the invention to:It proposes a kind of cement kiln depth waste heat recovery collaboration refuse burning system, effectively reduces
Energy waste present in waste incineration and generating electricity and cement industry effectively improves the totality of waste incineration and generating electricity with killing two birds with one stone
Manufacture of cement operational efficiency is improved while generating efficiency, reduces operation energy consumption.
The object of the invention is realized by following technical proposals:
A kind of cement kiln depth waste heat recovery collaboration refuse burning system, including more than kiln hood residual neat recovering system, rotary kiln
Heat recovery system, bypass system and refuse burning system, kiln hood residual neat recovering system include grate-cooler, the first dedusting dress
It sets, waste heat boiler, the second dust-extraction unit, blower unit and connecting pipe, rotary kiln residual neat recovering system include air-supply arrangement, sky
Gas heating device and connecting pipe, bypass system include third dust-extraction unit and connecting pipe, and refuse burning system includes
Incinerator, a wind pipe and First air air preheater, secondary air duct and air preheater of secondary air, a wind pipe warp
Heat primary air is supplied for incinerator after First air air preheater, secondary air duct is incinerator after air preheater of secondary air
Supply hot Secondary Air;
In kiln hood residual neat recovering system, in the middle part of grate-cooler and bleeding point is arranged in tail portion, is extracted from middle part bleeding point
Hot-air enters waste heat boiler by the first dust-extraction unit, by the second dust-extraction unit dedusting after residual heat boiler for exchanging heat, passes through
Blower unit is incorporated to after drawing in a wind pipe after First air air preheater, or after being incorporated to air preheater of secondary air
Secondary air duct in;The hot-air extracted from tail portion bleeding point enters the second dust-extraction unit;
In rotary kiln residual neat recovering system, cold air is sent by air heating apparatus by air-supply arrangement, in rotary kiln
After the heat that Surface absorption rotary kiln distributes, part hot-air is sent into the bypass before the third dust-extraction unit of bypass system
It mixes with bypass as cold air in system of leaking informaton introduction pipe, and draws blower unit in kiln hood residual neat recovering system
When the hot-air gone out is incorporated to a wind pipe, the hot-air part after air heating means heats is incorporated to secondary air preheating
In secondary air duct after device, or in kiln hood residual neat recovering system the hot-air that blower unit is drawn is incorporated to secondary air duct
When, the hot-air part after air heating means heats is incorporated in a wind pipe after First air air preheater;
In bypass system, the part hot-air introduced from rotary kiln residual neat recovering system is mixed with bypass,
Gaseous mixture after third dust-extraction unit dedusting is sent into refuse burning system, and the part combustion air as refuse burning system makes
With.
In the present invention, in order to reduce energy waste present in waste incineration and generating electricity and cement industry, kill two birds with one stone ground
Manufacture of cement operational efficiency is improved while improving the overall power generation efficiency of waste incineration and generating electricity, reduces operation energy consumption, inventor
Waste incineration and generating electricity and cement production process are in depth had studied, is found in research:
In refuse incineration and power generation journey, in order to make waste of low heating value preferably burn, it to be used for one, the two of incineration firing
Secondary air temperature should fully consider that refuse moisture is high, ash content is high, the lower characteristic of calorific value, and it is pre- that burning air has to pass through steam air
After hot device heating, incinerator could be sent into.Burning air into incinerator burner hearth should be maintained at stable temperature.This temperature
It needs to heat the flow of steam by adjusting to maintain.First air enters before incinerator, first passes through steam regenerative air heater
It is heated to 200-220 DEG C, is then blown from stove lower segment.Secondary Air enters before incinerator, and it is pre- to first pass through steam-type air
Hot device is heated to 150-180 DEG C, is then grouped from the front and back arch of incinerator and uniformly sprays into Secondary Air, reinforced the disturbance of flue gas, prolong
The fire stroke of long flue gas, makes air be sufficiently mixed with flue gas, ensures that fuel gas thoroughly burns in flue gas.But this articles for use
The higher steam of taste has been bound to cause the waste of high-quality heat source come the method that heats air.
However, there is also a large amount of heat waste in cement production system, wind turbine rouses in cement clinker burning system
The normal temperature air for entering grate-cooler, cools down clinker, is discharged, leads to as exhaust gas by the heated air part of high temperature chamotte
It is often recycled by building mating Waste Heat Power Station, this portion is introduced to the residual heat boiler for exchanging heat of Waste Heat Power Station.It is remaining
The exhaust gas of hot pot outlet of still can be down to 100 DEG C or so.Simultaneously in the low of about 120 DEG C of the exhaust outlet discharge temperature of cooling drive end unit
Warm exhaust gas, this two parts low temperature waste gas carry amount of heat and are discharged from chimney, result in a large amount of wastes of energy.
Cement production system kiln is since internal temperature is very high, although cylinder wall surface takes various insulations to arrange
It applies, but its surface can still reach certain temperature.To ensure the safe handling of rotary kiln.Its most of kiln body is direct
Exposure in air, in some special cases, can also use wind turbine progress kiln cylinder body surface air-cooled, to reduce kiln cylinder body surface
Temperature.Although this layout can meet the needs of rotary kiln running, cause a large amount of during rotary kiln running
Thermal energy is directly lost in air, and a large amount of wastes of energy are resulted in.
In addition, in cement production system, the chlorion (Cl that crude fuel is brought into is encountered sometimes-) the high situation of content,
Chlorion (the Cl of volatilization-) reach preheater in temperature lower region when can condense in the lower raw material of temperature, the chlorine of condensation
Ion (Cl-) come again with preheated raw meal in the higher kiln of temperature, and volatilize again, cause chlorion (Cl-) can be in kiln system
The internal cycle of system and enrichment, are easy to generate skinning in pre-heating system, or even result in blockage, seriously affect system production and product
Quality, so, it is to solve harmful constituent cycle that bypass measure appropriate is often taken in manufacture of cement, reduces in clinker and is harmful to
The practical method of component.But what bypass exhausted is the very high exhaust gas of temperature, results in a large amount of wastes of energy.
Therefore, the present invention proposes that a kind of cement kiln depth waste heat recovery cooperates with refuse burning system, including kiln hood waste heat to return
Receipts system, rotary kiln residual neat recovering system, bypass system, refuse burning system, wherein in kiln hood residual neat recovering system,
In the middle part of grate-cooler and bleeding point is arranged in tail portion, and the higher hot-air of temperature extracted from middle part bleeding point is filled by the first dedusting
It postpones and is drawn into waste heat boiler by blower unit, by the second dust-extraction unit dedusting after residual heat boiler for exchanging heat due to drawing
The air of wind apparatus outlet is still the hot-air for having certain temperature, using this hot-air as the part one, two of refuse burning system
Secondary wind uses.
In rotary kiln residual neat recovering system, cold air is sent by air heating apparatus by air-supply arrangement, in rotary kiln
The heat that Surface absorption rotary kiln distributes, the hot-air after this is heated make as the part primary and secondary air of refuse burning system
With, simultaneously because this part hot air temperature is relatively low, cooling air of a small amount of hot-air as bypass system.
In bypass system, since bypass temperature is higher, nuisance need to cool down bypass still in gaseous state
To 400-450 DEG C, nuisance is allowed to condense, a small amount of hot-air is introduced from rotary kiln residual neat recovering system and is mixed with bypass,
It drops to and introduces third dust-extraction unit after suitable temperature nuisance is solidificated in dust, the gaseous mixture after dedusting is sent into rubbish and is burnt
Burning system, the part combustion air as refuse burning system use.
Alternatively, in kiln hood residual neat recovering system, valve is set on pump-line in the middle part of the grate-cooler, is evacuated in tail portion
Valve is set on pipeline, when waste heat boiler normal operation, valve opening on the pump-line of middle part, valve on the pump-line of tail portion
It closes;When waste heat boiler off-the-line, valve is closed on the pump-line of middle part, valve opening on the pump-line of tail portion.In the program,
Valve is set on pump-line in the middle part of the grate-cooler, valve is set on the pump-line of tail portion, when waste heat boiler normal operation,
Valve opening on the pump-line of middle part, valve is closed on the pump-line of tail portion, and hot-air enters the second dedusting by waste heat boiler
Device, when waste heat boiler off-the-line, valve is closed on the pump-line of middle part, valve opening on the pump-line of tail portion, and hot-air is straight
It taps into the second dust-extraction unit.
Alternatively, blower unit outlet conduit is connected to chimney and is connected to rubbish by valve and burns by valve respectively
Burning system closes the valve that is connected with chimney when refuse burning system normal operation, opens and refuse burning system associated valve
Door;When refuse burning system off-the-line, the valve that is connected with refuse burning system is closed, opens the valve that is connected with chimney.The program
In, blower unit outlet conduit is connected to chimney by valve and is connected to refuse burning system by valve, works as waste incineration
When system normal operation, the valve that is connected with chimney is closed, opens the valve that is connected with refuse burning system, hot-air enters rubbish and burns
Burning system closes the valve that is connected with refuse burning system when refuse burning system off-the-line, opens the connected valve of chimney, and heat is empty
Gas is discharged into air.
Alternatively, valve is set on the pipeline that rotary kiln residual neat recovering system is connect with refuse burning system, works as rubbish
By valve opening when rubbish incineration system normal operation, valve is closed when refuse burning system off-the-line;With bypass system
Valve is set on the pipeline of system connection, when bypass system normal operation by valve opening, when bypass system sectionalizing
When valve is closed.
As further selection, on bypass system introduction pipe and in third dust-extraction unit and waste incineration system
Valve is set on the connected pipeline of system, when bypass system is put into, while opening bypass system introduction pipe upper valve
Door, the valve being connected with refuse burning system and the valve being connected with rotary kiln residual neat recovering system, when bypass system
When off-the-line, connected valve is closed.
Alternatively, setting control valve is exported in First air air preheater.
Alternatively, setting control valve is exported in air preheater of secondary air.
In said program, in refuse burning system, usual First air cheats interior extraction air from garbage storing, makes in garbage storing hole
Pressure maintains negative pressure state, prevents foul smell from escaping, and Secondary Air extracts the foul smell in incinerator dispenser seal closure, maintains to burn
Between air environment.Due to needed for waste incineration First air and Secondary Air temperature it is relatively low, and by kiln hood residual neat recovering system and
The hot-air that rotary kiln residual neat recovering system is sent has had certain temperature and flow, only needs primary air fan by a small amount of air
It is sent into First air steam regenerative air heater, a small amount of air is sent into Secondary Air steam regenerative air heater by overfire air fan, is led to
Cross after the heating of external heating steam be sent into incinerator after being mixed to the hot wind of cement production system.In addition, bypass system
The gaseous mixture with higher temperature of uniting is directly entered waste incinerator, and the part combustion air as refuse burning system uses.
Control valve is arranged in First air steam regenerative air heater exit, controls the temperature and flow of First air, makes First air and comes
To the hot wind mixing of cement system, mixes the temperature of hot wind and flow disclosure satisfy that the requirement of incinerator, in Secondary Air steam
Regenerative air heater outlet setting control valve, controls the temperature and flow of Secondary Air, makes Secondary Air and come to cement system
After hot wind mixing, mixes the temperature of hot wind and flow disclosure satisfy that the requirement of incinerator.
The foregoing main solution of the present invention and further alternatives thereof can be freely combined to form multiple schemes, be this
Invent the scheme that can be used and be claimed;And the present invention, between (each non conflicting selection) selection and between other selections
It can also be freely combined.Those skilled in the art, which can be illustrated after understanding the present invention program according to the prior art and common knowledge, to be had
Multiple combinations are the claimed technical solution of the present invention, do not do exhaustion herein.
Beneficial effects of the present invention:A kind of cement kiln depth waste heat recovery provided by the invention cooperates with refuse burning system,
Waste incineration and cement kiln waste heat recovery are organically combined, energy present in waste incineration and generating electricity and cement industry is effectively reduced
Source wastes, and manufacture of cement operation effect is improved while effectively improving the overall power generation efficiency of waste incineration and generating electricity with killing two birds with one stone
Rate reduces operation energy consumption, has good economic benefit and environmental benefit:
Cement kiln waste heat depth is recycled 1. realizing, take full advantage of the relatively low hot-air of temperature of kiln head and is returned
Cement kiln low temperature exhaust heat is recycled one, two come needed for partial alternative waste incineration by the radiation loss of rotary kiln drum surface
Secondary wind reduces the quantity of steam for heating air, and with low-quality heat source instead of high-quality heat source, the steam of high-quality is used
In power generation, improves the overall power generation efficiency of waste incineration and generating electricity and improve manufacture of cement operational efficiency, reduce operation energy consumption.
2. when the chloride ion content that crude fuel brings cement production system into is unstable, bypass system not timing is frequently opened
When the operating mode that start-stop stops, connected system valve need to be only turned on and off;Meanwhile when the unlatching of bypass system, from
A small amount of hot-air is introduced in rotary kiln residual neat recovering system to mix with bypass, is dropped to suitable temperature nuisance and is solidificated in dust
In after introduce high temperature dust-precipitator, gaseous mixture after dedusting is sent into refuse burning system, the part as refuse burning system
Combustion air uses, and can meet cement production system requirement and influence refuse burning system normal operation, while can also be by this
Partial heat recycles.
3. realizing that rubbish power generation by waste combustion is complementary with manufacture of cement, clinker produced by waste incineration and flying dust are sent into manufacture of cement
In system so that soot object is handled well.Waste incineration and generating electricity has the characteristics that garbage treatment quantity is big, volume reduction is good, also
The thermal energy of rubbish can be converted to electric energy, waste incineration electricity will be directly used in cement production system, both reduce rubbish hair
Electricity outward conveying caused by electricity transmission process in the waste of electric energy and the investment construction of transmission facility, and solve cement kiln it is a large amount of
The demand of power consumption.
Description of the drawings
Fig. 1 is the device flow diagram of the embodiment of the present invention 1;
Fig. 2 is the device flow diagram of the embodiment of the present invention 2;
Wherein 1---- grate-coolers, 2---- dust-precipitators, 3----AQC boilers, 4---- dedusters, 5---- air-introduced machines,
6---- chimneys, 7---- pressure fan, 8---- air heating apparatus, 9---- high temperature dust-precipitators, 10---- incinerators, 11---- mono-
Secondary wind turbine, 12---- First air steam regenerative air heaters, 13---- overfire air fans, 14---- Secondary Air steam-type air preheats
Device, 15---- rotary kilns, 16---- dore furnaces, 17---- system for cleaning fume, 18---- valves.
Specific implementation mode
Following non-limiting examples are for illustrating the present invention.
Embodiment 1:
Refering to what is shown in Fig. 1, cement kiln depth waste heat recovery cooperates with refuse burning system by kiln hood residual neat recovering system, revolution
Kiln residual neat recovering system, bypass system, refuse burning system composition, kiln hood residual neat recovering system include grate-cooler 1, gather dust
Device 2 (the first dust-extraction unit), AQC boilers 3 (waste heat boiler), deduster 4 (the second dust-extraction unit), air-introduced machine 5 (blower unit),
Chimney 6 and connecting pipe, rotary kiln residual neat recovering system include pressure fan 7 (air-supply arrangement), air heating apparatus 8 and connecting tube
Road, bypass system include high temperature dust-precipitator 9 and connecting pipe, refuse burning system include incinerator 10, primary air fan 11,
First air steam regenerative air heater 12, overfire air fan 13, Secondary Air steam regenerative air heater 14 and connecting pipe.
In kiln hood residual neat recovering system, bleeding point is set at 1 middle part of grate-cooler and tail portion, is extracted from middle part bleeding point
The higher hot-air of temperature enters AQC boilers 3 by dust-precipitator 2, by 4 dedusting of deduster after the heat exchange of AQC boilers 3, from tail
The hot-air that portion's bleeding point extracts also enters 4 dedusting of deduster, is then drawn by air-introduced machine 5, the sky exported due to air-introduced machine 5
Gas is still the hot-air for having certain temperature, is used this hot-air as the part First air of refuse burning system.
Valve 18 is set on 1 middle part pump-line of grate-cooler, valve 18 is set on the pump-line of tail portion, when AQC pots
When 3 normal operation of stove, valve 18 is opened on the pump-line of middle part, and valve 18 is closed on the pump-line of tail portion, and hot-air passes through AQC
Boiler 3 enters deduster 4, and when AQC 4 off-the-lines of boiler, valve 18 is closed on the pump-line of middle part, valve on the pump-line of tail portion
18 open, and hot-air is directly entered deduster 4, and 5 outlet conduit of air-introduced machine by valve 18 is connected to chimney 6 and by valve 18
It is connected to refuse burning system, when refuse burning system normal operation, closes the valve 18 that is connected with chimney 6, unlatching and rubbish
Incineration system is connected valve 18, and hot-air enters refuse burning system, when 10 off-the-line of incinerator, closes and refuse burning system
Be connected valve 18, opens chimney 6 and is connected valve 18, hot-air is discharged into air.
In rotary kiln residual neat recovering system, cold air is sent by air heating apparatus 8 by pressure fan 7, in rotary kiln
The heat that Surface absorption rotary kiln distributes, the hot-air after this is heated are used as the part Secondary Air of refuse burning system,
Simultaneously because this part hot air temperature is relatively low, cooling air of a small amount of hot-air as bypass system.With
Valve 18 is set on the pipeline of refuse burning system connection, valve 18 is opened when refuse burning system normal operation, works as rubbish
Valve 18 is closed when rubbish incineration system off-the-line, valve 18 is set on the pipeline being connect with bypass system, when bypass is put
Valve 18 is opened when wind system normal operation, closes valve 18 when bypass system sectionalizing.
In bypass system, since bypass temperature is higher, nuisance need to cool down bypass still in gaseous state
To 400-450 DEG C, nuisance is allowed to condense, a small amount of hot-air is introduced from rotary kiln residual neat recovering system and is mixed with bypass,
It drops to and introduces high temperature dust-precipitator 9 (third dust-extraction unit) after suitable temperature nuisance is solidificated in dust, it is mixed after dedusting
It closes pneumatic transmission and enters refuse burning system, the part combustion air as refuse burning system uses.In bypass system introduction pipe
Valve 18 above and on the pipeline that high temperature dust-precipitator 9 is connected with refuse burning system is set, when bypass system is put into,
Open valve 18 on bypass system introduction pipe, the valve 18 being connected with refuse burning system and rotary kiln waste heat simultaneously
The connected valve 18 of recovery system closes connected valve 18 when bypass system sectionalizing.
In refuse burning system, usual First air cheats interior extraction air from garbage storing, and pressure in garbage storing hole is made to maintain
Negative pressure state prevents foul smell from escaping, and Secondary Air extracts the foul smell in incinerator dispenser seal closure, maintains air ring between burning
Border.Due to needed for waste incineration First air and Secondary Air temperature it is relatively low, and by more than kiln hood residual neat recovering system and rotary kiln
The hot-air that heat recovery system is sent has had certain temperature and flow, only needs primary air fan 11 that a small amount of air is sent into one
A small amount of air is sent into Secondary Air steam regenerative air heater 14 by secondary wind steam regenerative air heater 12, overfire air fan 13, is led to
Cross after the heating of external heating steam with come feeding incinerator 10 after being mixed to the hot wind of cement production system.In addition, bypass
There is system the gaseous mixture of higher temperature to be directly entered waste incinerator 10, and the part combustion air as refuse burning system makes
With.Control valve 18 is set in 12 exit of First air steam regenerative air heater, controls the temperature and flow of First air, makes one
Secondary wind and the requirement that disclosure satisfy that incinerator 10 come the temperature and flow that after being mixed to the hot wind of cement system, mix hot wind,
Secondary Air steam regenerative air heater 13 outlet setting control valve 18, control the temperature and flow of Secondary Air, make Secondary Air with
Come to the hot wind mixing of cement system, mixes the temperature of hot wind and flow disclosure satisfy that the requirement of incinerator 10.
Embodiment 2:
Refering to what is shown in Fig. 2, cement kiln depth waste heat recovery cooperates with refuse burning system by kiln hood residual neat recovering system, revolution
Kiln residual neat recovering system, bypass system, refuse burning system composition, kiln hood residual neat recovering system include grate-cooler 1, gather dust
Device 2 (the first dust-extraction unit), AQC boilers 3 (waste heat boiler), deduster 4 (the second dust-extraction unit), air-introduced machine 5 (blower unit),
Chimney 6 and connecting pipe, rotary kiln residual neat recovering system include pressure fan 7 (air-supply arrangement), air heating apparatus 8 and connecting tube
Road, bypass system include high temperature dust-precipitator 9 and connecting pipe, refuse burning system include incinerator 10, primary air fan 11,
First air steam regenerative air heater 12, overfire air fan 13, Secondary Air steam regenerative air heater 14 and connecting pipe.
In kiln hood residual neat recovering system, bleeding point is set at 1 middle part of grate-cooler and tail portion, is extracted from middle part bleeding point
The higher hot-air of temperature enters AQC boilers 3 by dust-precipitator 2, by 4 dedusting of deduster after the heat exchange of AQC boilers 3, from tail
The hot-air that portion's bleeding point extracts also enters 4 dedusting of deduster, is then drawn by air-introduced machine 5, the sky exported due to air-introduced machine 5
Gas is still the hot-air for having certain temperature, is used this hot-air as the part Secondary Air of refuse burning system.
Valve 18 is set on 1 middle part pump-line of grate-cooler, valve 18 is set on the pump-line of tail portion, when AQC pots
When 3 normal operation of stove, valve 18 is opened on the pump-line of middle part, and valve 18 is closed on the pump-line of tail portion, and hot-air passes through AQC
Boiler 3 enters deduster 4, and when AQC 4 off-the-lines of boiler, valve 18 is closed on the pump-line of middle part, valve on the pump-line of tail portion
18 open, and hot-air is directly entered deduster 4, and 5 outlet conduit of air-introduced machine by valve 18 is connected to chimney 6 and by valve 18
It is connected to refuse burning system, when refuse burning system normal operation, closes the valve 18 that is connected with chimney 6, unlatching and rubbish
Incineration system is connected valve 18, and hot-air enters refuse burning system, when 10 off-the-line of incinerator, closes and refuse burning system
Be connected valve 18, opens chimney 6 and is connected valve 18, hot-air is discharged into air.
In rotary kiln residual neat recovering system, cold air is sent by air heating apparatus 8 by pressure fan 7, in rotary kiln
The heat that Surface absorption rotary kiln distributes, the hot-air after this is heated are used as the part First air of refuse burning system,
Simultaneously because this part hot air temperature is relatively low, cooling air of a small amount of hot-air as bypass system.With
Valve 18 is set on the pipeline of refuse burning system connection, valve 18 is opened when refuse burning system normal operation, works as rubbish
Valve 18 is closed when rubbish incineration system off-the-line, valve 18 is set on the pipeline being connect with bypass system, when bypass is put
Valve 18 is opened when wind system normal operation, closes valve 18 when bypass system sectionalizing.
In bypass system, since bypass temperature is higher, nuisance need to cool down bypass still in gaseous state
To 400-450 DEG C, nuisance is allowed to condense, a small amount of hot-air is introduced from rotary kiln residual neat recovering system and is mixed with bypass,
It drops to and introduces high temperature dust-precipitator 9 (third dust-extraction unit) after suitable temperature nuisance is solidificated in dust, it is mixed after dedusting
It closes pneumatic transmission and enters refuse burning system, the part combustion air as refuse burning system uses.In bypass system introduction pipe
Valve 18 above and on the pipeline that high temperature dust-precipitator 9 is connected with refuse burning system is set, when bypass system is put into,
Open valve 18 on bypass system introduction pipe, the valve 18 being connected with refuse burning system and rotary kiln waste heat simultaneously
The connected valve 18 of recovery system closes connected valve 18 when bypass system sectionalizing.
In refuse burning system, usual First air cheats interior extraction air from garbage storing, and pressure in garbage storing hole is made to maintain
Negative pressure state prevents foul smell from escaping, and Secondary Air extracts the foul smell in incinerator dispenser seal closure, maintains air ring between burning
Border.Due to needed for waste incineration First air and Secondary Air temperature it is relatively low, and by more than kiln hood residual neat recovering system and rotary kiln
The hot-air that heat recovery system is sent has had certain temperature and flow, only needs primary air fan 11 that a small amount of air is sent into one
A small amount of air is sent into Secondary Air steam regenerative air heater 14 by secondary wind steam regenerative air heater 12, overfire air fan 13, is led to
Cross after the heating of external heating steam with come feeding incinerator 10 after being mixed to the hot wind of cement production system.In addition, bypass
There is system the gaseous mixture of higher temperature to be directly entered waste incinerator 10, and the part combustion air as refuse burning system makes
With.Control valve 18 is set in 12 exit of First air steam regenerative air heater, controls the temperature and flow of First air, makes one
Secondary wind and the requirement that disclosure satisfy that incinerator 10 come the temperature and flow that after being mixed to the hot wind of cement system, mix hot wind,
Secondary Air steam regenerative air heater 13 outlet setting control valve 18, control the temperature and flow of Secondary Air, make Secondary Air with
Come to the hot wind mixing of cement system, mixes the temperature of hot wind and flow disclosure satisfy that the requirement of incinerator 10.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (9)
1. a kind of cement kiln depth waste heat recovery cooperates with refuse burning system, it is characterised in that:Including kiln hood residual neat recovering system,
Rotary kiln residual neat recovering system, bypass system and refuse burning system, kiln hood residual neat recovering system include grate-cooler, first
Dust-extraction unit, waste heat boiler, the second dust-extraction unit, blower unit and connecting pipe, rotary kiln residual neat recovering system include air-supply
Device, air heating apparatus and connecting pipe, bypass system include third dust-extraction unit and connecting pipe, waste incineration system
System includes incinerator, a wind pipe and First air air preheater, secondary air duct and air preheater of secondary air, First air
Pipeline supplies heat primary air after First air air preheater for incinerator, and secondary air duct is after air preheater of secondary air
Incinerator supplies hot Secondary Air;
In kiln hood residual neat recovering system, in the middle part of grate-cooler and bleeding point is arranged in tail portion, and the heat extracted from middle part bleeding point is empty
Gas enters waste heat boiler by the first dust-extraction unit, by the second dust-extraction unit dedusting after residual heat boiler for exchanging heat, passes through air inducing
Device is incorporated to after drawing in a wind pipe after First air air preheater, or be incorporated to after air preheater of secondary air two
In secondary wind pipeline;The hot-air extracted from tail portion bleeding point enters the second dust-extraction unit;
In rotary kiln residual neat recovering system, cold air is sent by air heating apparatus by air-supply arrangement, in rotary kiln surface
After absorbing the heat that rotary kiln distributes, part hot-air is sent into the bypass before the third dust-extraction unit of bypass system
It is mixed with bypass as cold air in system introduction pipe, and draw blower unit in kiln hood residual neat recovering system
When hot-air is incorporated to a wind pipe, after the hot-air part after air heating means heats is incorporated to air preheater of secondary air
Secondary air duct in, or when the hot-air that blower unit is drawn is incorporated to secondary air duct by kiln hood residual neat recovering system,
Hot-air part after air heating means heats is incorporated in a wind pipe after First air air preheater;
In bypass system, the part hot-air introduced from rotary kiln residual neat recovering system is mixed with bypass, through
Gaseous mixture after three dust-extraction unit dedustings is sent into refuse burning system, and the part combustion air as refuse burning system uses.
2. cement kiln depth waste heat recovery as described in claim 1 cooperates with refuse burning system, it is characterised in that:Kiln hood waste heat
In recovery system, valve is set on pump-line in the middle part of the grate-cooler, valve is set on the pump-line of tail portion, works as waste heat boiler
When normal operation, valve opening on the pump-line of middle part, valve is closed on the pump-line of tail portion;When waste heat boiler off-the-line, in
Valve is closed on portion's pump-line, valve opening on the pump-line of tail portion.
3. cement kiln depth waste heat recovery as described in claim 1 cooperates with refuse burning system, it is characterised in that:Blower unit
Outlet conduit is connected to chimney by valve respectively and is connected to refuse burning system by valve, when refuse burning system is normal
When operation, the valve that is connected with chimney is closed, opens the valve that is connected with refuse burning system;When refuse burning system off-the-line, close
The valve that is connected with refuse burning system is closed, the valve that is connected with chimney is opened.
4. cement kiln depth waste heat recovery as described in claim 1 cooperates with refuse burning system, it is characterised in that:In rotary kiln
Valve is set on the pipeline that residual neat recovering system is connect with refuse burning system, when refuse burning system normal operation by valve
It opens, closes valve when refuse burning system off-the-line;Valve is set on the pipeline being connect with bypass system, works as side
Road leak informaton system normal operation when by valve opening, valve is closed when bypass system sectionalizing.
5. cement kiln depth waste heat recovery as claimed in claim 4 cooperates with refuse burning system, it is characterised in that:It is put in bypass
Valve is set on wind system introduction pipe and on the pipeline that third dust-extraction unit is connected with refuse burning system, when bypass is put
Wind system put into when, while open valve on bypass system introduction pipe, the valve being connected with refuse burning system and
The valve being connected with rotary kiln residual neat recovering system closes connected valve when bypass system sectionalizing.
6. cement kiln depth waste heat recovery as described in claim 1 cooperates with refuse burning system, it is characterised in that:In First air
Air preheater outlet setting control valve.
7. cement kiln depth waste heat recovery as described in claim 1 cooperates with refuse burning system, it is characterised in that:In Secondary Air
Air preheater outlet setting control valve.
8. cement kiln depth waste heat recovery as described in claim 1 cooperates with refuse burning system, it is characterised in that:First air is empty
Air preheater is First air steam regenerative air heater, and air preheater of secondary air is Secondary Air steam regenerative air heater.
9. cement kiln depth waste heat recovery as described in claim 1 cooperates with refuse burning system, it is characterised in that:Waste incineration
Incinerator is grate type incinerator or fluidized bed incinerator in system.
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CN109855432A (en) * | 2019-03-28 | 2019-06-07 | 成都建筑材料工业设计研究院有限公司 | A kind of cement rotary kiln barrel residual heat utilizes device and assemble method |
CN111792859A (en) * | 2020-07-24 | 2020-10-20 | 天津水泥工业设计研究院有限公司 | Cement production system capable of reducing heat loss of surface of kiln cylinder and heat enthalpy loss of residual wind without kiln head |
CN112013638A (en) * | 2020-07-30 | 2020-12-01 | 国网山东省电力公司电力科学研究院 | Garbage drying system and method utilizing flue gas waste heat |
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CN112066713A (en) * | 2020-09-17 | 2020-12-11 | 成都建筑材料工业设计研究院有限公司 | Kiln head waste gas bypass air discharge waste heat utilization and coarse grain material recovery system and method |
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CN109855432A (en) * | 2019-03-28 | 2019-06-07 | 成都建筑材料工业设计研究院有限公司 | A kind of cement rotary kiln barrel residual heat utilizes device and assemble method |
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