The system that vapor reclaims pyrolytic carbon waste heat garbage drying in a kind of utilization rotary hearth furnace
Technical field
The utility model is related to solid waste resource recovery process field, more particularly to one kind utilizes refuse pyrolysis rotary hearth furnace
Interior vapor is reclaimed after pyrolytic carbon waste heat, the system for carrying out drying garbage.
Background technology
With China's rapid development of economy, urbanization process speed is constantly accelerated, and living standards of the people are improved constantly, Gu
The yield of body discarded object, particularly domestic waste is also being continuously increased, and serious pollution is caused to environment.Sustainable
Under the influence of idea of development, solid waste is innoxious, minimizing and the development and application of resource treatment technique and industrialization, will
A wide prospect can be faced.Therefore, solid waste treating technology research turns into after waste water, exhaust-gas treatment research
Another study hotspot.Wherein, solid waste resource recovery processing refers to using management and technological measure from solid waste
Material and the energy are reclaimed, the circulation of matter and energy can be accelerated, certain economic value is created.
Refuse pyrolysis method refers under conditions of anaerobic or anoxic, using the thermal instability of organic matter in garbage, to it
Heating distillation is carried out, organic matter is cracked, the condensed rear various new gases of formation, liquid and solid, then therefrom extract
Fuel oil, combustible gas etc..
It is related to a kind of rotary hearth furnace of radiant tube isolated smoke gas heating in the prior art, rotary hearth furnace is loop configuration, body of heater
It is made up of rotary furnace bottom and fixed furnace wall, furnace roof, furnace bottom is driven by furnace bottom machine to be rotated, and heated bulk material is laid in stove
On bottom, material is rotated with furnace bottom, and is remained static relative to furnace bottom, and the process for going to discharging opening from charging door completes to add
Thermally and chemically react.Some radiation tube heaters are provided with burner hearth, the material in stove is heated with radiation mode.
When carrying out pyrolysis processing to rubbish using above-mentioned rotary hearth furnace, rubbish is rotated in stove with furnace bottom, is gradually heated up heating
Complete dry, pyrolytic process.Accordingly, rotary hearth furnace can be divided into feed zone, dry section, pyrolysis zone, discharge zone.In dry section,
Moisture is evaporated in rubbish, is formed vapor, simultaneously because radiant tube temperature is higher, is had a small amount of rubbish and be pyrolyzed, and is formed
Combustible pyrolysis's gas.Generally, gas-liquid can be sent to together by drying the pyrolysis gas of the vapor formed and refuse pyrolysis formation
Piece-rate system carries out gas-liquid separation, and vapor is condensed into aqueous water.In the process, dry section generation vapor not by
Effectively utilize, and the steam vapour amount is big, about the 30%~50% of rubbish quality, cause greatly waste.
Utility model content
The utility model aims at effective utilization that vapor is produced to drying garbage pyrolysis in rotary hearth furnace, by vapor
After pyrolytic carbon heat exchange, drying garbage is carried out.The utility model can control the content of combustible gas in the vapor that rotary hearth furnace is generated,
The waste of heat in vapor is avoided, high financial profit is advantageously implemented industrial applications.
To achieve the above object, pyrolytic carbon waste heat is reclaimed the utility model proposes vapor in one kind rotary hearth furnace to dry
The system of rubbish, including rotary hearth furnace, blower fan, discharging machine, drying garbage device;
The rotary hearth furnace includes annular furnace wall, annular furnace roof, rotatable ring-shaped furnace bottom;The rubbish be placed on it is described can
On the ring-shaped furnace bottom of rotation;The rotary hearth furnace upper furnace is provided with radiation tube heater;
The rotary hearth furnace has feed zone, dry section, pyrolysis zone and discharge zone successively;The feed zone and the dry section
Between be provided with baffle plate;Baffle plate is provided between the dry section and the pyrolysis zone;
The dry section has gas outlet;
The blower fan has fan air inlet and blower fan gas outlet;The fan air inlet connects the outlet of the dry section
Mouthful;
The discharging machine is located in the discharge zone or near the discharge zone;The air inlet connection of the discharging machine is described
The gas outlet of blower fan;
The drying garbage device has air inlet, and the air inlet connects the gas outlet of the discharging machine;
The drying garbage device has garbage outlet, and the garbage outlet connects the feed zone.
Further, the rotary hearth furnace, drying garbage device, the regional of blower fan are provided with multiple air inlets or outlet
Mouthful.
Further, the blower fan is two or more.
Further, the discharging machine is indirect cooling spiral discharging machine.
Further, the drying garbage device is roller dryer.
Further, temperature instrument and combustible gas composition detection instrument are provided with the gas outlet of the dry section.
Further, rubbish turning device and Duo Tai pressure instrumentations are provided with the dry section.
Further, the radiation tube heater is indirect radiant tube heating device.
In the utility model, rubbish is dried the mode that rotary hearth furnace uses radiant tube indirectly heat, at pyrolysis
Reason, the pressure in each region of temperature and rotary hearth furnace by controlling radiant tube, and rubbish is overturn, it can be prevented effectively from dry
Refuse pyrolysis generates combustible gas in dry area, so as to ensure the high-purity of vapor produced in rotary hearth furnace.And the vapor
The waste heat of pyrolytic carbon can be fully reclaimed, the drying process of rubbish is then carried out, the effective recycling of the energy can be achieved.
Brief description of the drawings
Fig. 1 illustrates for the system architecture for reclaiming pyrolytic carbon waste heat garbage drying with vapor in rotary hearth furnace in the utility model
Figure.
Fig. 2 is the structural representation of rotary hearth furnace in the utility model.
Fig. 3 is the system flow chart in the utility model with vapor recovery pyrolytic carbon waste heat garbage drying in rotary hearth furnace.
Reference in accompanying drawing is as follows:
Ith, rotary hearth furnace;IIth, blower fan;IIIth, discharging machine;IV, drying garbage device;
1st, feed zone;2nd, dry section;3rd, pyrolysis zone;4th, discharge zone;5th, gas outlet;6th, gas outlet;7th, gas outlet.
Embodiment
Below in conjunction with drawings and examples, embodiment of the present utility model is described in more details, with
Just scheme of the present utility model and the advantage of its various aspects be better understood when.However, specific implementations described below
Mode and embodiment are only the purposes of explanation, rather than to limitation of the present utility model.
As shown in figure 1, being the system for reclaiming pyrolytic carbon waste heat garbage drying in the utility model with vapor in rotary hearth furnace
Structural representation, figure includes rotary hearth furnace I, blower fan II, discharging machine III, drying garbage device IV.
As shown in Fig. 2 be the structural representation of above-mentioned rotary hearth furnace I, the rotary hearth furnace have successively feed zone 1, dry section 2,
Pyrolysis zone 3, discharge zone 4.
See Fig. 2, above-mentioned dry section 2 has gas outlet 5, and above-mentioned pyrolysis zone 3 has gas outlet 6 and gas outlet 7.
Above-mentioned blower fan II include blower fan 1 and blower fan 2, and all have air inlet and gas outlet, wherein the air inlet of blower fan 1 with
The gas outlet 5 of dry section 2 is connected.
Discharging machine III is arranged in the discharge zone 4 or in its vicinity, with air inlet and gas outlet, the discharging machine III
The gas outlet of air inlet connecting fan 1.
Drying garbage device IV has air inlet, and the air inlet is connected with the gas outlet of discharging machine III.
Drying garbage device IV has garbage outlet, and the garbage outlet is connected with the feed zone 1 of rotary hearth furnace I.
The body of heater of rotary hearth furnace I includes annular furnace wall, annular furnace roof, rotatable ring-shaped furnace bottom, rubbish be placed on it is described can
On the ring-shaped furnace bottom of rotation.The upper space of the burner hearth of rotary hearth furnace I is provided with radiation tube heater.
It is provided with dry section 2 at rubbish turning device, gas outlet 5 and is provided with temperature instrument and combustible gas into go-on-go
Instrument is surveyed, the gas outlet 5 is connected with the air inlet of blower fan 1, one or more gas outlets in other areas connect with the air inlet of blower fan 2
Connect.
The boundary, dry section 2 and the boundary of pyrolysis zone 3 of dry section 2 and feed zone 1 are both provided with baffle plate and many
The gap between material on pressure instrumentation, the baffle plate and rotatable ring-shaped furnace bottom is the ㎜ of < 100.
Drying garbage device IV uses roller dryer in the utility model.
As shown in figure 3, being the system for reclaiming pyrolytic carbon waste heat garbage drying in the utility model with vapor in rotary hearth furnace
Flow chart, comprises the following steps:
A, rubbish pretreatment:Garbage raw material is transported in roller dryer first, using vapor to rubbish therein
Rubbish raw material is dried, and reduces the moisture content of garbage raw material, obtains the rubbish through pre-dried.
B, drying garbage pyrolysis processing:Rubbish through pre-dried is transported to the He of dry section 2 successively by feed zone 1
In pyrolysis zone 3, it is placed on rotatable ring-shaped furnace bottom and is dried, is pyrolyzed, produces vapor and pyrolytic carbon.Rubbish upset dress
Putting can be overturn to above-mentioned rubbish, it is ensured that rubbish is heated evenly, it is to avoid hot-spot causes refuse pyrolysis generation a large amount of flammable
Gas, so as to effectively control the content of combustible gas composition in vapor.The radiant tube that the processing procedure is set in burner hearth provides heat
Amount, uses the mode of radiant tube indirec radiation heating, also can effectively ensure that the high-purity of vapor.
The boundary of dry section 2 and feed zone 1 is provided with baffle plate and many pressure instrumentations.The wherein effect of baffle plate
It is that the gas for preventing feed zone flows into dry section.Pressure instrumentation is used to detect the pressure near boundary baffle plate, works as detection
When the pressure differential arrived is < 5Pa, by adjusting blower fan 1, the high 5~20Pa of pressure of the pressure ratio feed zone 1 of dry section 2 is maintained.
Dry section 2 and the boundary of pyrolysis zone 3 are provided with baffle plate and many pressure instrumentations.The wherein effect of baffle plate
It is that the combustible gas for preventing pyrolysis zone from producing flows into dry section.Pressure instrumentation is used to detect the pressure near boundary baffle plate,
When the pressure differential detected is < 5Pa, by adjusting blower fan 1 and blower fan 2, the pressure of pyrolysis zone 3 is reduced, dry section 2 is maintained
Pressure ratio pyrolysis zone 3 the high 5~20Pa of pressure.
Temperature instrument is used to detect the temperature of vapor at gas outlet 5, by control the heating efficiency of radiant tube come
Ensure that the temperature of vapor is maintained between 120~400 DEG C.Combustible gas composition detection instrument is used to detect flammable at gas outlet 5
The mass content of gas, when detecting the mass content > 1% of combustible gas in vapor, blower fan 1 is stopped, and makes dry section 2
The gas of interior generation all extracts rotary hearth furnace out by blower fan 2 via other gas outlets beyond gas outlet 5.
C, vapor heating:The pyrolytic carbon that pyrolysis zone 3 is produced is transported in discharging machine III via discharge zone 4, in dry section 2
The vapor of generation is by blower fan 1, at the air inlet that discharging machine III is drawn to via gas outlet 5, also into discharging machine III.
In discharging machine III, vapor realizes the heating of vapor as the cooling medium of pyrolytic carbon while pyrolytic carbon temperature is reduced.
In the utility model, discharging machine III uses indirect cooling spiral discharging machine, for being produced in pyrolysis zone 3
Temperature is discharged and cooled down for 750 DEG C of pyrolytic carbon, and in the indirect cooling spiral discharging machine, the temperature of vapor can rise to
450~500 DEG C.
D, vapor are recycled:Vapor after will heat up is transported to drying garbage by the gas outlet of discharging machine III and filled
IV is put, garbage raw material therein is dried, predrying rear rubbish is obtained, then again transported predrying rear rubbish to turning bottom back
Proceed the process described in step B in stove I.
Embodiment 1
Use moisture content for 45% pretreated rubbish as the garbage raw material in the embodiment, treating capacity is
100t/d (ton day).
Moisture content is transported to roller dryer for 45% garbage raw material first, conveyed into roller dryer
180~230 DEG C of vapor, pre-dried is carried out to rubbish therein, and moisture content is predrying to containing for 45% rubbish
Water rate is 30%, and the consumption of vapor is 20t/d.
Rubbish through pre-dried is transported in rotary hearth furnace and is dried, is pyrolyzed, maintains the pressure ratio of dry section to enter
It is 120~180 DEG C to expect that steam temperature at high 5Pa, dry section gas outlet is distinguished in area, pyrolysis zone pressure.Vapor is transported to
In indirect cooling spiral discharging machine, 450 DEG C are warming up to, rear vapor is will heat up and is transported in roller dryer and carry out rubbish and do
Dry processing.
Embodiment 2
Step be the same as Example 1 in the present embodiment, maintains the pressure ratio feed zone of dry section, pyrolysis zone pressure high respectively
Steam temperature is 180~230 DEG C at 10Pa, dry section gas outlet, and 500 DEG C of steam temperature after heating, other each conditions are same
Embodiment 1.
Embodiment 3
Step be the same as Example 1 in the present embodiment, maintains the pressure ratio feed zone of dry section, pyrolysis zone pressure high respectively
Steam temperature is 230~400 DEG C at 20Pa, dry section gas outlet, and 500 DEG C of steam temperature after heating, other each conditions are same
Embodiment 1.
Variation
Many variations can also be expanded out based on embodiment of the present utility model and embodiment, for example:
Furnace wall in the body of heater of rotary hearth furnace, furnace roof, rotatable stove bottom can may make up rotary hearth furnace for other in addition to annular
Shape, furnace bottom can use arbitrary rotating manner.
Radiant tube may be provided in the other positions of rotary hearth furnace, but not influence to use in its heating function, or rotary hearth furnace
Other types of mode of heating.
The order of connection of each subregion can not influence the order that rotary hearth furnace works for other in rotary hearth furnace, or the quantity of subregion can
Decrease or increase, any number of air inlet or gas outlet can be set in each region.
Temperature instrument, combustible gas composition detection instrument, baffle plate, pressure instrumentation, the quantity of blower fan are not limited
System.
Discharging machine can have discharging and the device of refrigerating function using other any kinds.
Drying garbage device can be other devices for having functions/drying worked suitable for the rotary hearth furnace.
Finally it should be noted that:Obviously, above-described embodiment is only intended to clearly illustrate the utility model example,
And the not restriction to embodiment.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.And thus
Among the obvious changes or variations amplified out is still in protection domain of the present utility model.