CN106402887A - System and method for drying garbage by means of waste heat from flue gas - Google Patents
System and method for drying garbage by means of waste heat from flue gas Download PDFInfo
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- CN106402887A CN106402887A CN201610997626.3A CN201610997626A CN106402887A CN 106402887 A CN106402887 A CN 106402887A CN 201610997626 A CN201610997626 A CN 201610997626A CN 106402887 A CN106402887 A CN 106402887A
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- flue gas
- temperature flue
- drying
- middle temperature
- garbage
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Classifications
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- 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
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
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- 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
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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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
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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a system and method for drying garbage by means of waste heat from flue gas. The system comprises a high-temperature flue gas cooling pretreatment unit, an intermediate-temperate flue gas conveying unit and a drying unit. High-temperature flue gas passes through the high-temperature flue gas cooling pretreatment unit, and intermediate-temperate flue gas is obtained; the intermediate-temperate flue gas is input into the drying unit through the intermediate-temperate flue gas conveying unit to dry the garbage in the drying unit. The drying unit comprises a feeding belt sealed cabin and a feeding belt in the feeding belt sealed cabin, the garbage is arranged on the feeding belt, and the conveying direction of the feeding belt and the flowing direction of the intermediate-temperate flue gas are converse. According to the system and method for drying the garbage by means of the waste heat from the flue gas, the garbage is dried on the feeding belt, the surface area of the garbage is increased, the thickness of the garbage is decreased, and the drying speed of the garbage can be effectively increased. In addition, an additional heat source is not needed, and large transformation and changes do not need to be conducted on an original mechanism; in the actual operating process, flexibility is high, and operability is high.
Description
Technical field
The present invention relates to comprehensive utilization of energy technical field, more particularly, to a kind of system and method for garbage drying, more
Body ground, is related to a kind of system and method for utilization fume afterheat garbage drying.
Background technology
In recent years, the yield of China's municipal solid wastes is increased with annual 8%～10% speed, the composition of solid waste
Tend to variation and complicate, therefore need to consider innoxious, minimizing and resource when processing these solid waste.Tradition
Landfill disposal and compost method there is many deficiencies again, as low in recycling level, two can be brought to soil and groundwater
Secondary pollution etc..Incineration technology be presently believed to be realize daily-life garbage without environmental pollution, minimizing and resource most effective means it
One.The domestic garbage pyrolysis new technology that latest developments are got up also has the features such as process cleaning is thorough, energy utilization rate is high.
However, China's house refuse moisture content is typically more than 50%, calorific value is relatively low, the moisture solution in rubbish so as to
Burn and pyrolytic process energy consumption increases, thus increased the operating cost of garbage disposal.Therefore in waste incineration or pyrolytic process
In, important pre-treatment is exactly to reduce moisture content.
At present waste incineration project reduce crude waste moisture content method have by external heat source in drier to rubbish
Rubbish is dried, biological dewatered method, composting process etc..Biological dewatered method is i.e. using organic during microorganism high-temperature aerobic fermentation
Biological heat energy produced by thing degraded, promotes moisture evaporation by process adjustment means, thus quickly removing moisture removal.
If high temperature drying is carried out to rubbish using external heat source, undoubtedly can increase investment and the cost of garbage disposal.
Therefore, prior art discloses the garbage drying method a kind of operation be applied to incineration treatment of garbage, the method
It is characterised by that rubbish was previously dried device, the high-temperature flue gas of incinerator burner hearth outlet before entering incinerator burner hearth
By being arranged in the pipeline above drier, rubbish is contacted in drier with high-temperature flue gas, completes heat exchange dry run, is done
Rubbish after dry is admitted to be mixed with air in incinerator burner hearth and completes combustion process, burns the partial fume producing and enters
Enter drier and next group rubbish is dried.When refuse thermal value is relatively low it is impossible to when meeting whole burning process requirement, then in drier
The higher auxiliary material of middle interpolation calorific value, after so that rubbish is mixed with auxiliary material, is re-fed into garbage incinerator chamber inner combustion.
But, the shortcoming of this technology is that high-temperature flue gas are unprocessed directly and rubbish contact heat-exchanging, and rubbish is in drier
Interior easy generation pyrolysis or burning, are unfavorable for the stability that drier runs；In addition, flue gas is directly contacted with rubbish in drier
Heat exchange, is also easy to produce volume of smoke, and the process of follow-up flue dust makes technological process long, and equipment investment maintenance cost increases, economical
Poor；In addition the flying dust in flue gas, slag etc. can produce corrosive wear, the therefore material requirements of drier relatively to drier
Height, there is burn into the problems such as block in fume pipe Louis, overhaul of the equipments frequently, is difficult to realize industrialization.
To sum up, higher, economical poor, the commercial application difficult to realize of prior-art devices requirement property.
In addition to above-mentioned waste incineration and pyrolytic technique, also proposed biological drying technology for garbage disposal, biological
Drying is also a kind of preconditioning technique to municipal refuse.It is municipal refuse to be dried using biological respinse heat release, to improve
Its combustion characteristics.It is frequently used for municipal refuse being dried in mechanical biological processing plant.Biological drying technology is different from composting process,
It is intended to the biomass content being dried and retaining in Rubbish medium.In biological drying reactor, main drying machine is made as air pair
Flow evaporator, and the physical characteristic of material also has certain impact to drying effect.The selection of the type of reactor ventilating system is also
One important influence factor of biological drying.It is the process that using the principle of compost, rubbish is dried with dehydration, that is, exist
In the case of forced ventilation, compost microbe utilizes the organic matter fermentation heat production in composting, and ventilation under high temperature accelerates moisture
Volatilization, makes the moisture of composting be remarkably decreased, thus realizing the effect of biological drying.
However, as a kind of emerging technology, research shows, biological drying method need to be carried out to the different variables in process control
Process, just can obtain effective result.Handling process is more complicated, and parameters control more strict, force ventilation heat convection
Unit increased the operation energy consumption of process, and economy is poor, still needs to further research and development in terms of processing municipal refuse.
Content of the invention
For overcome prior art using burn and pyrolysis processing house refuse during, energy consumption increase, less economical, dry
Effect is poor, the low shortcoming of rate of drying, and the present invention provides a kind of system and method for utilization fume afterheat garbage drying.
The present invention provides a kind of system of utilization fume afterheat garbage drying.It is single that it includes cooling high-temperature fume pretreatment
First, middle temperature flue gas supply unit and drying unit.Wherein, high-temperature flue gas obtain through described cooling high-temperature fume pretreatment unit
Middle temperature flue gas, is then passed through described middle temperature flue gas supply unit and inputs described drying unit, to the rubbish in described drying unit
It is dried.
Described drying unit includes charging belt sealed compartment and the charging belt in described charging belt sealed compartment, rubbish
Rubbish is arranged on described charging belt, and described charging belt direction of transfer and described middle temperature flow of flue gas direction are reverse.
Described system also includes low temperature waste gas processing system, for processing after garbage drying low temperature waste gas (or the letter of residual
Claim " flue gas "), described by management be connected with rubbish directly contact drying unit with described middle temperature flue gas.
Described low temperature waste gas processing system includes the second air-introduced machine, low temperature waste gas pipeline and biological deodorizing tower, and described second
Air-introduced machine is arranged on the exhanst gas outlet of described drying unit, and low temperature waste gas are introduced described low temperature waste gas pipeline, then through described
Biological deodorizing tower is processed.
Described cooling high-temperature fume pretreatment unit includes flue gas surge tank, the first air-introduced machine and heat exchanger, wherein, by height
Warm flue gas, through described flue gas surge tank, is passed in described heat exchanger by described first air-introduced machine, produces middle temperature flue gas.
Described middle temperature flue gas supply unit includes middle temperature flue gas pipeline and air blast, and described middle temperature flue gas pipeline receives described
The middle temperature flue gas that cooling high-temperature fume pretreatment unit produces, and by the synergism of described air blast by described middle temperature flue gas
It is delivered to described drying unit.
It is provided with pipe insulating layer, for keeping the temperature in described middle temperature flue gas pipeline outside described middle temperature flue gas pipeline.
Described charging belt sealed compartment outer cover adopts stainless steel material, and described charging belt sealed compartment outer layer is provided with sealing
Cabin heat-insulation layer, for keeping the temperature in described belt sealed compartment.
Described sealed compartment heat-insulation layer adopts rock wool as insulation material.
In addition, present invention also offers a kind of method of utilization said system garbage drying, methods described includes following step
Suddenly：
High-temperature flue gas heat exchange：High-temperature flue gas the changing through described cooling high-temperature fume pretreatment unit that engine is discharged
Hot device, obtains the middle temperature flue gas of 100～200 DEG C of temperature；
Middle temperature flue gas conveying：Will be defeated for described middle temperature flue gas by the middle temperature flue gas pipeline in described middle temperature flue gas supply unit
Deliver to the drying unit of described middle temperature flue gas and rubbish directly contact；
Drying garbage：Using the heat of described middle temperature flue gas in the drying unit with rubbish directly contact for the described middle temperature flue gas
Amount is dried to rubbish.
Methods described is further comprising the steps of：
Low temperature waste gas are processed：With described low temperature waste gas processing system, the low temperature waste gas producing after garbage drying are processed.
The system and method for the utilization fume afterheat garbage drying being provided by the present invention, have been reclaimed fume afterheat, have passed through
Reduce into stove msw water content, improve garbage disposal furnace operational factor.In addition, the present invention different from the past in feed bin to rubbish
Rubbish is dried, and the present invention takes garbage drying on charging belt, increases the surface area of rubbish, reduces rubbish thickness,
Drying garbage speed can be effectively improved.Additionally, the present invention is without extra heat source, original mechanism need not be carried out with big transformation and become
More, in actual moving process, flexibility is high, workable.Finally, the present invention improves the entirety of crude waste drying process
Economy, also functions to certain effect to the energy consumption reducing garbage disposal furnace.
Brief description
Fig. 1 is the structural representation of the system of garbage drying of the present invention.
Fig. 2 is the process chart of the system garbage drying using the present invention.
Description of reference numerals：
1：Engine
2：Flue gas surge tank
3：Heat exchanger
4：Charging belt sealed compartment
5：Charging belt
6：Sealed compartment heat-insulation layer
7：Garbage disposal furnace
8：Middle temperature flue gas pipeline
9：Low temperature waste gas pipeline
10：Biological deodorizing tower
Specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in more details, so that energy
The advantage enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and enforcement
Example is only descriptive purpose, rather than limitation of the present invention.
First, the present invention provides a kind of system of utilization fume afterheat garbage drying.It includes cooling high-temperature fume and locates in advance
Reason unit, middle temperature flue gas supply unit and drying unit.Wherein, high-temperature flue gas are through described cooling high-temperature fume pretreatment unit
Obtain middle temperature flue gas, be then passed through described middle temperature flue gas supply unit and input described drying unit, in described drying unit
Rubbish is dried.
As shown in figure 1, described cooling high-temperature fume pretreatment unit includes flue gas surge tank 2, the first air-introduced machine (does not show
Go out) and heat exchanger 3, wherein, by high-temperature flue gas through described flue gas surge tank 2, it is passed into described by described first air-introduced machine
In heat exchanger 3, produce middle temperature flue gas.
As shown in figure 1, described high-temperature flue gas are usually from engine 1, engine 1 is not the engine of narrow sense herein,
Refer mainly to produce the mechanical device of high-temperature flue gas in the course of the work, such as internal combustion engine, gas turbine or gas fired-boiler etc..Logical
, for 400～500 DEG C it is impossible to be directly used in drying garbage, this temperature is too high, easily causes rubbish for the temperature of Chang Suoshu high-temperature flue gas
Dry run is pyrolyzed, its product is difficult to collect, and causes the waste of resource.
For reducing the impact to engine 1 performance for the exhaust back pressure change, the present invention is at the high-temperature flue gas outlet of engine 1
One flue gas surge tank 2 of setting, and one the first air-introduced machine is set in heat exchanger smoke outlet, the first air inducing fan delivery is with slow
Rush pressure tank to change and change, thus ensureing that engine 1 exhaust back pressure will not too high or too low impact to engine performance.
As shown in figure 1, described heat exchanger 3 generally adopts dividing wall type heat exchanger or using natural air cooled device etc., heat exchanger
Also cooling circulating water flowmeter can be set, flexible modulation can change the parameter such as exhaust gas volumn and temperature.Described high-temperature flue gas are through institute
State the first air-introduced machine described heat exchanger 3 of introducing and carry out cooling high-temperature fume pretreatment, produce middle temperature flue gas, the temperature of middle temperature flue gas
It is usually 100～200 DEG C, this temperature is the temperature being suitable for garbage drying, had both met the requirement of drying garbage, and had not resulted in rubbish again
Rubbish is pyrolyzed in advance.Dividing wall type heat exchanger adopts water as cooling medium, and water (flow) direction is contrary with flue gas flow direction, thus improving heat exchange effect
Rate, the hot water of generation is available for plant area or hot water user uses.
As shown in figure 1, described middle temperature flue gas supply unit includes middle temperature flue gas pipeline 8 and air blast (not shown), described
Middle temperature flue gas pipeline 8 receives the middle temperature flue gas that described cooling high-temperature fume pretreatment unit produces, and by described air blast
Described middle temperature flue gas is delivered to described drying unit by synergism.Described air blast generally adopts booster fan, its setting
In the porch of described drying unit,
In addition, being provided with pipe insulating layer (not shown) outside described middle temperature flue gas pipeline, for keeping described middle temperature flue gas
Temperature in pipeline, it is to avoid energy loss in being delivered to charging belt way for the middle temperature flue gas.Described pipe insulating layer is typically adopted
Outer wall used in middle temperature flue gas pipeline 8 wraps up the mode of insulation material.
As shown in figure 1, described drying unit includes charging belt sealed compartment 4 and in described charging belt sealed compartment 4
Charging belt 5, rubbish is arranged on described charging belt 5, the direction of transfer of described charging belt 5 and described middle temperature flue gas stream
Dynamic direction is reverse.Described charging belt sealed compartment 4 outer cover adopts stainless steel material, and described charging belt sealed compartment 4 outer layer sets
It is equipped with sealed compartment heat-insulation layer 6, described sealed compartment heat-insulation layer 6 is typically employed in the outer layer covers rock of described charging belt sealed compartment 4
The mode of the insulation materials such as cotton, for keeping the temperature in described charging belt sealed compartment 4, reduces thermal loss.
As shown in Figure 1 it is generally the case that charging belt 5 can horizontally or diagonally be placed according to live physical condition, feeding skin
Carry 5 length 10～20m, width 0.5～1.5m.Average thickness after rubbish tiling on charging belt 5 is 20～30mm, feeding skin
Rubbish outer surface 30～40mm on charging belt 5 for the outer cover with sealed compartment 4, thus form one between rubbish and outer cover
Bar middle temperature flue gas circulation road, and the rubbish reverse convection direct contact heat transfer being laid on charging belt 5, in continual and steady operating mode
Under the conditions of, on charging belt 5, endlessly rubbish is persistently purged by hot-fluid, and the moisture in rubbish is waved under middle temperature flue gas acts on
Send out and discharge charging belt sealed compartment 4 with low temperature waste gas, low-water-content rubbish after drying enters garbage disposal furnace 7 to be carried out
Generally 50～100 DEG C of the temperature of the low temperature waste gas after rubbish heat exchange on next step process, with charging belt 5.
It should be noted that time of contact of the thickness of rubbish tiling and middle temperature flue gas and rubbish on charging belt 5, connecing
Contacting surface the parameter such as is amassed and drying effect is played with vital effect, and thickness is less, and time of contact is longer, contact area (heat exchange
Area) bigger, the effect being dried is better.Generally contact area is determined with width by the length of charging belt 5, time of contact with upper
The transfer rate of material belt 5 is relevant.
Heat exchange area is S=D × L, and wherein D is charging belt 5 width, and L is charging belt 5 length.Flue gas is changed with rubbish
The thermo-contact time is T=L/V, and wherein V is belt feeding speed, can be adjusted by changing belt motor frequency.In flue gas pair
During drying garbage, flue gas with the heat exchange of rubbish is：Q=S α (Ta-T), Q are heat exchange amount in the unit time, and α is heat convection
Coefficient, Ta is flue-gas temperature, and T is rubbish surface temperature.In S, in the case that α and T is constant, the increase of Ta makes incoming heat Q
Increase, evaporation is also faster, moisture effusion rubbish surface is also easier.The rate of drying of rubbish is：V=(M0-Me)/M0T,
M0For rubbish initial mass, MeFor quality after drying garbage, t is middle temperature flue gas and rubbish time of contact.By changing middle temperature
The parameters such as flue-gas temperature Ta (120～180 DEG C), speed V of charging belt 5 can change heat exchange amount Q and the rubbish of flue gas and rubbish
Rate of drying v of rubbish.Thus being adjusted to the optimum condition of a flue gas drying rubbish.
Additionally, the air blast of described middle temperature flue gas supply unit can improve middle temperature flue gas hot blast and tiling on charging belt 5
Refuse container chamber heat transfer efficiency.
Described system also includes low temperature waste gas processing system, for processing the low temperature waste gas of residual after garbage drying, described
It is connected with rubbish directly contact drying unit with described middle temperature flue gas by management.
Described low temperature waste gas processing system includes the second air-introduced machine (not shown), low temperature waste gas pipeline 9 and biological deodorizing tower
10, described second air-introduced machine is arranged on the exhanst gas outlet of described drying unit, and low temperature waste gas are introduced described low temperature waste gas pipeline
9, then processed through described biological deodorizing tower 10, reduce air pollution.Processing low temperature waste gas using other modes still can be complete
Become the object of the invention.
In addition, present invention also offers a kind of method of utilization said system garbage drying, methods described includes following step
Suddenly：
High-temperature flue gas heat exchange：The high-temperature flue gas that engine 1 is discharged are through described cooling high-temperature fume pretreatment unit
Heat exchanger 2, obtains the middle temperature flue gas of 100～200 DEG C of temperature；
Middle temperature flue gas conveying：By the middle temperature flue gas pipeline 8 in described middle temperature flue gas supply unit by described middle temperature flue gas
It is delivered to the drying unit of described middle temperature flue gas and rubbish directly contact；
Drying garbage：Using the heat of described middle temperature flue gas in the drying unit with rubbish directly contact for the described middle temperature flue gas
Amount is dried to rubbish.
Methods described is further comprising the steps of：
Low temperature waste gas are processed：With described low temperature waste gas processing system, the low temperature waste gas producing after garbage drying are processed.
Additionally, simply being pre-processed to rubbish, such as screen out bulk inorganic matter, metal etc..The rubbish having sieved with
After crushed, be also greatly improved drying effect.
Embodiment 1：
Certain refuse pyrolysis factory, the pyrolysis gas of generation are used for generating electricity, and generating equipment uses gas internal-combustion engine.Internal combustion engine produces
Raw fume afterheat can be used as the thermal source of drying garbage.Crude waste moisture content of marching into the arena is 40%.Component of refuse consists of：
Table 1 house refuse becomes to be grouped into (wt%)
First, Xin Ru factory rubbish is sieved, screened out bulk inorganic matter, metal etc..The rubbish having sieved is with laggard
Row is broken, then by grab bucket, the rubbish being crushed to certain particle size is sent into charging belt, enters next step drying process.
Generator is 4, and the rated power of every generator is 500kw, and the discharge capacity of every internal combustion engine is 70L, smoke evacuation temperature
Spend for 400～450 DEG C.The flue gas of 4 internal combustion engines is delivered to dividing wall type heat exchanger after being aggregated into a house steward and is carried out cooling process.
Then, there is heat in the recirculated water that (400～450 DEG C) of high-temperature flue gas enter in dividing wall type heat exchanger and heat exchanger coils
Amount exchanges.The water inlet of heat exchanger is provided with water pump and flowmeter, thus it is possible to vary recirculated water enters into the flow of heat exchanger, from
And the temperature of heat exchanger exit flue gas can be adjusted.Heat exchanger water inlet water temperature is 15～25 DEG C, and delivery port water temperature is 70～90
℃.Heat exchanger entrance flue-gas temperature is 350～400 DEG C, and at heat exchanger exit, flue-gas temperature is 100～200 DEG C.The heat producing
Water can heat supply user use, and middle temperature flue gas (100～200 DEG C) is done to rubbish to the charging belt of sealing by Pipeline transport
Dry.
Then, charging belt takes hermetically sealed mode, and charging belt is slope bucket type, is 30 degree with horizontal plane angle,
The long 20m of charging belt, width 1m, on charging belt, rubbish average thickness is 200mm.Run duration, charging belt remains a constant speed
Rubbish is sent into garbage disposal furnace by continuous-stable.
It should be noted that middle temperature flue gas (100～200 DEG C) is delivered in charging belt sealed compartment changing with rubbish counter current contacting
Heat.Dried enter stove msw water content can reduce by 5～15%.
Because, after flue gas and rubbish heat exchange, the temperature of low temperature waste gas is 60～80 DEG C, gas componant be mainly carbon dioxide,
The gases such as stench, therefore can not directly discharge or as combustion air etc..Low temperature waste gas are delivered to biological deodorizing tower through air-introduced machine and are processed
After discharge.The whole operation of internal combustion engine flue gas drying rubbish completes.
Embodiment 2：
Certain refuse pyrolysis factory, the pyrolysis gas of generation are used for generating electricity, and generating equipment uses gas internal-combustion engine.Internal combustion engine produces
Raw fume afterheat can be used as the thermal source of drying garbage.Crude waste moisture content of marching into the arena is 50%.Component of refuse consists of：
Table 2 house refuse becomes to be grouped into (wt%)
First, Xin Ru factory rubbish is sieved, screened out bulk inorganic matter, metal etc..The rubbish having sieved is with laggard
Row is broken, then by grab bucket, the rubbish being crushed to certain particle size is sent into charging belt, enters next step drying process.
Run duration, rubbish is sent into garbage disposal furnace by the charging belt continuous-stable that remains a constant speed.Generator is 5, often
The rated power of platform generator is 800kw, and the discharge capacity of every internal combustion engine is 90L, and exhaust gas temperature is 450～500 DEG C.5 internal combustions
The flue gas of machine is delivered to dividing wall type heat exchanger after being aggregated into a house steward and is carried out cooling process.
Then, there is heat in the recirculated water that (450～500 DEG C) of high-temperature flue gas enter in dividing wall type heat exchanger and heat exchanger coils
Amount exchanges.The water inlet of heat exchanger is provided with water pump and flowmeter, thus it is possible to vary recirculated water enters into the flow of heat exchanger, from
And the temperature of heat exchanger exit flue gas can be adjusted.Heat exchanger water inlet water temperature is 20～25 DEG C, and delivery port water temperature is 60～80
℃.Heat exchanger entrance flue-gas temperature is 400～450 DEG C, and at heat exchanger exit, flue-gas temperature is 120～180 DEG C.The heat producing
Water can heat supply user use, and middle temperature flue gas (120～180 DEG C) is done to rubbish to the charging belt of sealing by Pipeline transport
Dry.
Then, charging belt takes hermetically sealed mode, and charging belt is horizontal, the long 30m of charging belt, width 2m, on
On material belt, rubbish average thickness is 150mm.
It should be noted that middle temperature flue gas (120～180 DEG C) is delivered in charging belt sealed compartment changing with rubbish counter current contacting
Heat.Dried enter stove msw water content can reduce by 15～25%.
Because, after flue gas and rubbish heat exchange, the temperature of low temperature waste gas is 60～80 DEG C, gas componant be mainly carbon dioxide,
The gases such as stench, therefore can not directly discharge or as combustion air etc..Low temperature waste gas are delivered to biological deodorizing tower through air-introduced machine and are processed
After discharge.The whole operation of internal combustion engine flue gas drying rubbish completes.
It should be noted that each embodiment above by reference to described by accompanying drawing only limits this in order to illustrate rather than
The scope of invention, it will be understood by those within the art that, right under the premise without departing from the spirit and scope of the present invention
Modification or equivalent that the present invention is carried out, all should cover within the scope of the present invention.Additionally, indication unless the context
Outward, the word occurring in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of can use in conjunction with all or part of of any other embodiment.
Claims (10)
1. a kind of system of utilization fume afterheat garbage drying, it is defeated that it includes cooling high-temperature fume pretreatment unit, middle temperature flue gas
Send unit and drying unit, wherein,
High-temperature flue gas obtain middle temperature flue gas through described cooling high-temperature fume pretreatment unit, are then passed through described middle temperature flue gas defeated
Send unit input described drying unit, the rubbish in described drying unit is dried it is characterised in that
Described drying unit includes charging belt sealed compartment and the charging belt in described charging belt sealed compartment, rubbish cloth
Put on described charging belt, described charging belt direction of transfer and described middle temperature flow of flue gas direction are reverse.
2. the system as claimed in claim 1 is it is characterised in that described system also includes low temperature waste gas processing system, for locating
The low temperature waste gas of residual after reason garbage drying, described by management and described middle temperature flue gas and rubbish directly contact drying unit phase
Even.
3. system as claimed in claim 2 is it is characterised in that described low temperature waste gas processing system includes the second air-introduced machine, low
Warm exhaust pipe and biological deodorizing tower, described second air-introduced machine is arranged on the exhanst gas outlet of described drying unit, by low temperature waste gas
Introduce described low temperature waste gas pipeline, then processed through described biological deodorizing tower.
4. described system as arbitrary in claims 1 to 3 is it is characterised in that described cooling high-temperature fume pretreatment unit includes
Flue gas surge tank, the first air-introduced machine and heat exchanger, wherein, by high-temperature flue gas through described flue gas surge tank, are drawn by described first
Blower fan is passed in described heat exchanger, produces middle temperature flue gas.
5. described system as arbitrary in claims 1 to 3 is it is characterised in that described middle temperature flue gas supply unit includes middle temperature cigarette
Air pipe and air blast, described middle temperature flue gas pipeline receives the middle temperature flue gas that described cooling high-temperature fume pretreatment unit produces,
And described middle temperature flue gas is delivered to by described drying unit by the synergism of described air blast.
6. system as claimed in claim 5, it is characterised in that being provided with pipe insulating layer outside described middle temperature flue gas pipeline, is used
Temperature in the described middle temperature flue gas pipeline of holding.
7. described system as arbitrary in claims 1 to 3 is it is characterised in that described charging belt sealed compartment outer cover is using stainless
Steel material, described charging belt sealed compartment outer layer is provided with sealed compartment heat-insulation layer, for keeping the temperature in described belt sealed compartment
Degree.
8. system as claimed in claim 7 is it is characterised in that described sealed compartment heat-insulation layer adopts rock wool as insulation material.
9. using the arbitrary described system garbage drying of such as claim 1～8 method it is characterised in that methods described includes
Following steps：
High-temperature flue gas heat exchange：The high-temperature flue gas that engine is discharged are through the heat exchange of described cooling high-temperature fume pretreatment unit
Device, obtains the middle temperature flue gas of 100～200 DEG C of temperature；
Middle temperature flue gas conveying：By the middle temperature flue gas pipeline in described middle temperature flue gas supply unit, described middle temperature flue gas is delivered to
Described middle temperature flue gas and the drying unit of rubbish directly contact；
Drying garbage：Using the heat pair of described middle temperature flue gas in the drying unit with rubbish directly contact for the described middle temperature flue gas
Rubbish is dried.
10. method as claimed in claim 9 is it is characterised in that methods described is further comprising the steps of：
Low temperature waste gas are processed：With described low temperature waste gas processing system, the low temperature waste gas producing after garbage drying are processed.
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Address after: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155 Applicant after: Shenwu science and technology group Limited by Share Ltd Address before: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155 Applicant before: Beijing Shenwu Environment Energy Technology Group Co., Ltd. |
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Application publication date: 20170215 |