JP3831513B2 - Waste carbonization pyrolysis melting combustion equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is used for pyrolysis melting combustion treatment of waste such as municipal waste, and by making improvements to a heat recovery system for combustion exhaust gas from a melting combustion device, heat from combustion exhaust gas is used to heat dry distillation. The present invention relates to a dry distillation pyrolysis melting combustion apparatus capable of economically decomposing waste without causing high temperature corrosion on a cracking drum.
[0002]
[Prior art]
FIG. 3 and FIG. 4 show an example of a conventional waste carbonization pyrolysis melting combustion apparatus, and the waste C supplied into the carbonization pyrolysis drum 2 by the supply apparatus 1 Then, after being heated to a temperature of 300 ° C. to 600 ° C. for a certain period of time and converted into a pyrolysis gas G and a pyrolysis residue D, it is separated into a pyrolysis gas G and a pyrolysis residue D in the carry-out device 3.
[0003]
The separated pyrolysis gas G is subsequently sent to the melt combustion device 4 and burned at a high temperature. Further, the pyrolysis residue D is sent to the sorting device 5 and separated into a relatively coarse incombustible solid and a fine combustible solid. Further, the combustible solid I thus separated is finely pulverized by the pulverizer 6 and then supplied to the melt combustion device 4 and melted and burned at a temperature of 1200 ° C. or higher.
Note that the molten slag F formed in the molten combustion device 4 is sequentially taken out as a granulated slag. Further, the combustion exhaust gas G _O from the melt combustion apparatus 4 a waste heat boiler 7, the dust collecting device 8, the gas purifier 9, go is discharged through the chimney 10 into the atmosphere.
[0004]
The dry distillation pyrolysis drum 2 is formed of a rotary drum provided with a heating tube 11, and a heating gas for heating the waste C into the plurality of heating tubes 11 arranged in the longitudinal direction of the drum. K is circulating.
Meanwhile, as the heating gas K for heating waste C carbonization pyrolysis drum 2, using a high temperature combustion exhaust gas G _O from the melt combustion apparatus 4, heat to supply it to the carbonization pyrolysis drum 2 This is the most economical policy.
However, the high-temperature combustion exhaust gas G _O from the melt combustion apparatus 4, hydrogen chloride (HCl) gas produced by the combustion of organic chlorine compounds such as vinyl chloride contained in the waste C are contained in a large amount Because of its severe corrosiveness at high temperatures, it is generally avoided to use it as the heating gas K for the dry distillation pyrolysis drum 2.
[0005]
Therefore, in the conventional dry distillation pyrolysis melting combustion apparatus, an oil or gas-fired hot air generator 12 is connected between the gas inlet side and the gas outlet side of the dry distillation pyrolysis drum 2, and the hot air generator The heated gas K from 12 is supplied into the heating tube 11 of the dry distillation pyrolysis drum 2 to heat the waste C (FIG. 3), or a high-temperature air heater 13 is provided on the outlet side of the melt combustion apparatus 4 During the steady operation, high temperature air (heated gas K) heated by the air heater 13 is supplied into the dry distillation pyrolysis drum 2 to heat the waste C (FIG. 4).
[0006]
3 and 4, 14 is a steam turbine power generator, 15 is a blower, 16 is an induction fan, 17 is a cooling conveyor, 18 is a combustible fine powder storage tank, 19 is a heated gas flow path, and 20 is A circulation fan, 21 is a heat exchanger, 22 is an oil burner or gas burner, 23 is a waste pit, and 24 is a waste supply crane.
[0007]
[Problems to be solved by the invention]
The combustion gas (heating gas K) generated in the hot air generator 12 using the fossil fuel is usually a so-called clean gas and hardly contains corrosive substances. Therefore, troubles due to high temperature corrosion are almost completely prevented.
Similarly, since high temperature air (heating gas K) from the air heater 13 does not contain corrosive substances, troubles due to high temperature corrosion of the heating tube 11 of the dry distillation pyrolysis drum 2 and the like are almost completely prevented. .
[0008]
However, the dry distillation pyrolysis melting combustion apparatus using the hot air generating furnace 12 requires external fuel such as oil and gas during the operation of the apparatus, which inevitably increases the running cost and significantly increases the processing cost of the waste C. There is a problem that it is difficult to lower the price.
[0009]
Further, in carbonization pyrolysis melt combustion apparatus using the air heater 13, since air heater 13 is in direct contact with the combustion exhaust gas G _O containing hydrogen chloride, high temperature corrosion occurs in the air heater 13 itself, this It must be replaced in a short time. As a result, after causing maintenance costs or rising sharply, such that adhering dust in the combustion exhaust gas G _O decreases the heat recovery efficiency problem, if the nature and amount of waste C has changed There are problems such as difficulty in controlling the temperature of air (heating gas K).
[0010]
[Problems to be solved by the invention]
The present invention has the above-mentioned problems in the conventional dry distillation pyrolysis melting combustion apparatus, that is, (1) when fuel such as oil is used for heating the waste, it is difficult to save energy, Waste treatment costs cannot be significantly reduced. (2) High temperature corrosion due to hydrogen chloride is unavoidable when the combustion exhaust gas from a melting combustion device is used as a heating source. (3) Waste It is intended to solve problems such as difficulty in controlling the temperature of the heated gas when the nature and amount of the gas changes, and it can greatly reduce running costs and maintenance costs, as well as due to hydrogen chloride. It is an object of the present invention to provide a dry distillation pyrolysis melting combustion apparatus for waste which does not cause problems such as high temperature corrosion and has excellent controllability.
[0011]
[Means for Solving the Problems]
The invention of claim 1 is a dry distillation pyrolysis drum that pyrolyzes waste to pyrolyze it into pyrolysis gas and pyrolysis residue, a melt combustion apparatus that melts and combusts pyrolysis gas and combustibles in the pyrolysis residue, A sand heating device that is provided downstream of the melting combustion device and that heats the sand to recover heat by spraying sand as a heat medium into the combustion exhaust gas from the melting combustion device, and below the sand heating device The thermal decomposition gas heating device that heats the waste gas with the high-temperature sand from the sand heating device, and the heat of the combustion exhaust gas that is provided downstream of the sand heating device and discharged from the sand heating device A waste heat boiler that collects the sand and a sand transport device that returns the sand discharged from the pyrolysis gas heating device to a sand spraying port above the sand heating device, and the pyrolysis gas heating device is disposed below. A cylindrical body with a sand outlet, and a cylindrical body A heating pipe disposed within the body, a portion of the low-temperature heating gas which is arranged below the heating pipes in which the basic configuration of the invention that was formed from a purge nozzle for injecting into the sand.
[0012]
The invention of claim 2 is a dry distillation pyrolysis drum that pyrolyzes waste to pyrolyze it into pyrolysis gas and pyrolysis residue, a melt combustion apparatus that melts and combusts pyrolysis gas and combustibles in the pyrolysis residue, A sand heating device that is provided downstream of the melting combustion device and that heats the sand to recover heat by spraying sand as a heat medium into the combustion exhaust gas from the melting combustion device, and below the sand heating device The thermal decomposition gas heating device that heats the heated gas of the waste flowing in the heating pipe with the high-temperature sand from the sand heating device, and the downstream of the sand heating device, discharged from the sand heating device A waste heat boiler for recovering the heat of the combustion exhaust gas, and a sand conveying device for returning the sand discharged from the pyrolysis gas heating device to a sand spraying port above the sand heating device, and the pyrolysis gas heating The cylindrical body of the device Oscillatably connected to Jo body, in which the basic configuration of the invention that was configured to micro-vibration by the main vibration system of the oscillatably supported pyrolytic gas heating device.
[0013]
The invention of claim 3 is the invention of claim 1, wherein the main body of the sand heating device and the main body of the pyrolysis gas heating device are integrally formed into a vertical cylindrical body, from the intermediate portion of the cylindrical body Combustion exhaust gas is introduced upward and led out from the upper part, and a sand spraying port is formed at the uppermost part of the cylindrical body, and a sand discharge port is formed at the lowermost part.
[0014]
The invention of claim 4 is the invention of claim 1 or claim 2, wherein the sand conveying device comprises a sanding screw device for extracting sand from the pyrolysis gas heating device, and a bucket conveyor device for conveying the derived sand. And a screen device for removing foreign matter from the sand.
[0015]
According to a fifth aspect of the present invention, in the first or second aspect of the present invention, the gas inlet side and the gas outlet side are communicated with each other by a bypass passage having a damper device in the heating pipe of the pyrolysis gas heating device. This is a heating tube having the above-described configuration.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall system diagram of a dry distillation pyrolysis melting combustion apparatus for waste according to an embodiment of the present invention. In FIG. 1, the same parts and members as those in FIGS. The same reference numbers are used.
In FIG. 1, 1 is a supply device, 2 is a dry distillation pyrolysis drum, 3 is an unloading device, 4 is a melt combustion device, 5 is a sorting device, 6 is a crushing device, 7 is a waste heat boiler, and 8 is a dust collector. , 9 is a gas purification device, 10 is a chimney, 15 is a blower, 16 is an induction fan, 17 is a cooling conveyor, 18 is a combustible fine powder storage tank, 19 is a heated gas flow path, 20 is a circulation fan, and 23 is waste The pit 24 is a waste supply crane, which has the same configuration as that shown in FIGS.
[0018]
In FIGS. 1 and 2, S is sand, 25 is a sand heating device, 25a is a cylindrical body, 25b is a sand spraying port, 25c is a combustion exhaust gas inlet, 25d is a combustion exhaust gas outlet, and 26 is heat. Gas heater for decomposition, 26a is a cylindrical body, 26b is a heating tube, 26c is a purge nozzle, 27 is a sand replenishment silo, 27a is a sand spreader, 28 is a sand transport device, 28a is a sanding screw device, and 28b is Bucket conveyor device, 28c is a screen device, 29 is a slag water cooling tank, 30 is a bypass flow path, 31 is a damper device, 32 is a vibration generator, 33 is a temperature control device, 34 is a header, 35 is a dust collecting ash silo, 36 Is a blower, 37 is a combustion exhaust gas flow path, and members from FIG. 25 to FIG. 35 are members constituting the main part of the present invention.
[0019]
The dry distillation pyrolysis drum 2 is rotatably supported at an inclination angle of about 1.5 degrees with respect to the horizontal so that the inlet side is positioned upward and the outlet side is positioned downward. It is rotationally driven at a rotational speed of 1 to 3 rpm. In addition, a plurality of heating tubes (not shown) are disposed in the dry distillation pyrolysis drum 2 in parallel to the axial direction of the drum. Each heating tube is supported and fixed in a state where both ends thereof are communicated with the inlet casing and the outlet casing, respectively, and rotates together with the dry distillation pyrolysis drum 2.
[0020]
Said molten combustion device 4, a vertical cylindrical body 4a and the inclined bottom surface 4b is provided with a discharge channel 4c, etc. of the combustion exhaust gas G _O, pyrolysis gas G from above the main body 4a, the pyrolysis residue in D The carbon residue I _O and the dust collection ash E from the dust collection ash silo 35 are injected, and are melted and burned at a high temperature.
Moreover, the molten slag F produced | generated by the melt combustion flows down along the bottom face 4b, and falls in the slag water cooling tank 29 from the slag discharge port 4d.
[0021]
The sand heating device 25 is a sand spray type heating device formed in a so-called vertical cylindrical shape as shown in FIG. 2, and its main part is constituted by a cylindrical main body 25a. That is, a combustion exhaust gas inlet 25c is formed on the lower side wall of the cylindrical main body 25a, a combustion exhaust outlet 25d is provided on the upper side wall of the cylindrical main body 25a, and sand is sprayed on the uppermost portion of the cylindrical main body 25a. Each mouth 25b is formed.
A lower portion of the cylindrical main body 25a is opened and communicated with an upper opening of the pyrolysis gas heating device 26 as described later.
Further, the combustion exhaust gas inlet 25c of the cylindrical main body 25a communicates with the gas discharge passage 4c of the molten combustion device 4, and the combustion exhaust gas outlet 25d of the cylindrical main body 25a passes through the combustion exhaust gas passage 37 and is a waste heat boiler. 7 to communicate.
[0022]
The pyrolysis gas heating device 26 includes a cylindrical main body 26a whose bottom surface is formed in an inverted conical shape, a heating pipe 26b disposed in the cylindrical main body 26a, and a purge nozzle 26c installed below the heating pipe 26b. Etc., and the hot sand S descending in the sand heating device 25 is sequentially discharged above the cylindrical body 26a.
Moreover, the upper end of the cylindrical main body 26a is connected to the lower end of the cylindrical main body 25a of the sand heating device 25 via an expansion joint 26e, and the pyrolysis gas heating device is connected to the fixed sand heating device 25. As will be described later, 26 is supported so as to be relatively movable by a small dimensional distance.
Further, a sand discharge port 26d is provided at the lowermost end of the cylindrical main body 26a, and the sand S is discharged at a predetermined flow rate through a sand discharge screw device 28a described later.
[0023]
In the present embodiment, the pyrolysis gas heating device 26 is suspended and supported so as to freely vibrate via expansion joints 26e and 26f, a support spring 26g, a flexible tube 26h, and the like, so that vibration is generated. By operating the device (vibration motor) 32, a fine vibration of a predetermined frequency is given to the cylindrical main body 26a, thereby increasing the heat transfer coefficient between the sand S and the heating pipe 26b. Of course, the cylindrical main body 25a and the cylindrical main body 26a of the pyrolysis gas heating device 26 may be integrally formed, and the pyrolysis gas heating device 26 may be fixed.
[0024]
A plurality of the heating tubes 26b are arranged in parallel in the cylindrical main body 26a. The gas inlet side and the gas outlet side of each heating pipe 26b are connected to the header 34, and the heating gas (air) K is circulated through the heating gas flow path 19 by the circulation fan 20 at a predetermined flow rate. .
In addition, the gas inlet side and the gas outlet side of the heating pipe 26b are communicated with each other by a bypass passage 30 provided with a damper device 31, and the opening degree of the damper device 31 is adjusted by a signal from the temperature control device 33. By doing this, the temperature of the high-temperature heated gas K circulating to the dry distillation pyrolysis drum 2 is adjusted.
In FIG. 2, reference numeral 38 denotes a sand level meter.
[0025]
The sand replenishment silo 27 stores replenishment sand S, and new sand S is supplied above the sand spreader 27a as necessary.
[0026]
The sand conveying device 28 includes a sand removing screw device 28a that takes out the sand S from the pyrolysis gas heating device 26, a bucket conveyor device 28b that conveys the taken sand S, and the sand S discharged from the bucket conveyor device 28b. Are formed from a screen device 28c and the like excluding the solid matter. In addition, as the sand S for a heat medium, silicon carbide having a particle diameter of 1 to 3 mm is used.
[0027]
Next, the operation of the waste carbonization pyrolysis melting combustion apparatus of the present invention will be described.
The waste C stored in the waste pit 23 is sequentially supplied into the dry distillation pyrolysis drum 2 by the supply device 1 and is heated to room temperature by the heated gas K flowing through the heating pipe in a state where substantially oxygen is shut off. To 300 ° C. to 600 ° C., preferably 400 ° C. to 500 ° C. By stirring and mixing in this state for about 1 hour, the waste C in the dry distillation pyrolysis drum 2 is pyrolyzed, and a pyrolysis gas G and a solid pyrolysis residue D are generated.
[0028]
Thermal decomposition of the waste C is usually completed in about 1 hour, and approximately 75 wt% of pyrolysis gas G and 25 wt% of pyrolysis residue D are generated.
The generated pyrolysis residue D is homogenized by stirring and mixing in the dry distillation pyrolysis drum 2 and becomes particles of uniform size.
The generated pyrolysis gas G is mainly composed of moisture, CO, CO ₂ , H ₂ and hydrocarbons, and contains a little dust and tar, and its lower heating value is about 1500 to 2000 kcal. / Kg.
Furthermore, although the pyrolysis residue D is mainly composed of carbon and ash, the carbon content varies depending on the particle size of the pyrolysis residue D, and the smaller the particle size, the greater the carbon content. For example, when the particle size of the pyrolysis residue D is 5 mm or less, the carbon content is approximately 35 wt%.
[0029]
The pyrolysis gas G and pyrolysis residue D in the dry distillation pyrolysis drum 2 are discharged into the adjacent carry-out device 3 where they are separated into pyrolysis gas G and pyrolysis residue D.
The separated pyrolysis gas G is supplied to the melt combustion apparatus 4 and is so-called melt burned together with the carbon residue _IO and dust collection ash E described later.
Further, the pyrolysis residue D is cooled on the cooling conveyor 17 from a temperature of about 400 ° C. to 500 ° C. to a temperature of about 80 ° C., and in the sorting device 5, iron, aluminum, or non-combustible material that is a valuable material. By sorting sand, glass and the like, the combustible solid material I mainly composed of combustible material is separated.
Further, the separated combustible solid I is atomized by the pulverizer 6 and then stored in the combustible fine powder storage tank 18, and as described above, the dust collection ash E from the waste heat boiler 7, the dust collector 8 or the like. At the same time, it is sent to the melt combustion apparatus 4 by pneumatic transportation, where it is burned together with the pyrolysis gas G.
That is, the carbon residue I 2 _O having a high carbon content supplied into the melt combustion apparatus 4 is heated at a high temperature of about 1300 ° C., which is about 100 to 150 ° C. higher than the melting temperature of ash in the melt combustion apparatus 4 together with the pyrolysis gas G The molten slag F is burned and flows down along the inclined bottom surface 4b, and is discharged into the slag water cooling tank 29 from the slag discharge port 4d, thereby forming a so-called granulated slag.
[0030]
Combustion exhaust gas G _O of elevated temperature of about 1100 to 1200 ° C. occurring in the melt combustion apparatus within 4 is introduced from the lower part of the cylindrical main body 25a of the sand heating device 25 through the gas discharge channel 4c to its interior. The combustion exhaust gas G _O of the introduced high temperature, giving the cylindrical body 25a in the sand S which drops are sprayed with the heat retained from above while passing upward through the subsequent flue gas passage 37 It is introduced into the waste heat boiler 7.
[0031]
Into the cylindrical main body 25a of the sand heating device 25, the heat medium sand S is sprayed at a predetermined flow rate from the sand spray port 25b provided at the uppermost portion thereof. While descending the inside of the main body 25a, it comes into contact with the high-temperature combustion exhaust gas _GO and is heated.
Specifically, the high temperature of the inlet temperature of the combustion exhaust gas G _O is 1000 to 1100 ° C., outlet temperature 700 to 800 ° C., inlet temperature of the sand S is 300 to 400 ° C., the outlet temperature are respectively set to 700 to 800 ° C. ing.
Further, the sand S is dispersed and released uniformly by the sand spreader 27a with respect to the cross section of the cylindrical main body 25a.
[0032]
The sand S heated to 700 to 800 ° C. in the sand heating device 25 is lowered by gravity from below the cylindrical main body 25a to above the cylindrical main body 26a of the pyrolysis gas heating device 26. Further, the combustion exhaust gas G _O, as described above is sent to the waste heat boiler 7 through flue gas passage 37, the exhaust gas G _O cooled to about 200 ° C.-position by heat recovery in the waste heat boiler, dust collecting device After the dust is removed by 8, it is cleaned by the gas purification device 9, and after removing harmful substances such as HCl, SOx, NOx, etc., it is discharged from the chimney 10 into the atmosphere.
[0033]
In the cylindrical main body 26a of the pyrolysis gas heating device 26, sand S as a heat medium is accumulated in layers, and the amount of sand S descending from the sand heating device 25 and the sand The amount of sand S discharged from the cylindrical body 26a by the take-out screw device 28a is almost balanced.
That is, the sand S as the heat medium circulates in a circulation path formed by the sand heating device 25, the pyrolysis gas heating device 26, and the sand transport device 28, and enters the system from a sand replenishment silo 27 described later. The shortage of sand S is replenished.
[0034]
In the pyrolysis gas heating device 26, while the high-temperature sand S flows down in the cylindrical main body 26a, the retained heat is given to the heating gas (air) K through the heating pipe 26b, and the heating gas K is heated. Is done.
Specifically, in the pyrolysis gas heating device 26 of the present embodiment, the sand inlet temperature 700 to 800 ° C, the outlet temperature 400 to 500 ° C, the heating gas K inlet temperature 250 to 350 ° C, and the outlet temperature 500 to 600. Each is set to ℃.
[0035]
A part of the low-temperature heating gas (air) K circulated from the dry distillation pyrolysis drum 2 is jetted into the sand S from the purge nozzle 26 c provided at the bottom of the pyrolysis gas heating device 26. The by heated gas K jetted into the sand S, the combustion exhaust gas G _O including adhering to the sand S has been brought into the pyrolysis gas heating device 26 HCl or the like is dissipated upward, the cylindrical main body 26a The inside is kept in a cleaner state.
Moreover, in order to improve the heat exchange property between the sand S and the heating pipe 26b, the cylindrical body 26a is held so as to be able to vibrate slightly, and the vibration generating device 32 is operated as necessary to generate a gas heater for pyrolysis. 26 may be slightly vibrated.
Furthermore, in order to adjust the outlet side temperature of the heated gas K, the inlet side and the outlet side of the heating pipe 26b are connected by a bypass flow path 30 provided with a damper device 31, and a damper device 31 is connected by a temperature control device 33. The temperature of the heating gas K returned to the dry distillation pyrolysis drum 2 is maintained at 500 to 600 ° C. by controlling the opening and closing of the gas and adjusting the flow rate of the low temperature heating gas K mixed into the high temperature heating gas K.
[0036]
In the pyrolysis gas heating device 26, the heated gas (air) K heated to about 500 ° C. to 600 ° C. by the high-temperature sand S is sent to the dry distillation pyrolysis drum 2 through the heated gas passage 19 as described above. Then, the waste C is refluxed in a state where the temperature is lowered to 250 to 350 ° C. by heating the waste C.
[0037]
The sand S discharged from the pyrolysis gas heating device 26 by the sand removing screw device 28a is conveyed onto the screen device 28c by the bucket conveyor device 28b, where solids such as clinker generated in the sand heating device 25 are transported. after the dust contained in the foreign matter and the combustion exhaust gas G _O is removed and returned to the sand heating device 25. Further, an appropriate amount of sand is replenished from the sand replenishment silo 27 into the system.
[0038]
【The invention's effect】
In the present invention, sand is used as a heat medium, and the sand is heated by high-temperature exhaust gas from the melt combustion apparatus, and the waste gas is heated to a predetermined temperature by sensible heat of the sand.
As a result, a heating gas generating device using fossil fuel as in the conventional dry distillation pyrolysis melting combustion device of this kind of waste becomes unnecessary, and the waste processing cost can be greatly reduced.
Further, in the present invention, the sand heating device and the pyrolysis gas heating device are formed in a vertical cylindrical shape, both are arranged in a line in the vertical direction, and the sand is heated by countercurrent contact with the high-temperature combustion exhaust gas. Is lowered into the pyrolysis gas heating device by gravity. As a result, the structure of the sand heating device and the pyrolysis gas heating device can be simplified, and the driving energy of the kiln such as the rotary kiln type sand heating device is not required, and further energy saving is possible.
Furthermore, the high-temperature sand obtained by heat exchange with the flue gas from the melt combustion apparatus contains almost no corrosive gas components such as hydrogen chloride gas contained in the flue gas, and becomes a clean heat source. Is.
As a result, the heating tube provided in the pyrolysis gas heating apparatus is placed under conditions that hardly cause high-temperature corrosion, and can be operated stably over a long period of time.
[0039]
Further, in the invention of claim 1, the pyrolysis gas heating device includes a cylindrical main body provided with a sand discharge port below, a heating pipe disposed in the cylindrical main body, and a lower part of the heating pipe. Since it is configured to include a purge nozzle that ejects a portion of the provided low-temperature heating gas into the sand, by heating a predetermined amount of heating gas (air) from the purge nozzle into the sand layer, Combustion exhaust gas that has entered the pyrolysis gas heating apparatus accompanying the sand from the apparatus is easily eliminated, and high-temperature corrosion of the heating pipe can be more completely prevented.
According to a second aspect of the present invention, the cylindrical main body of the pyrolysis gas heating device is connected to the cylindrical main body of the sand heating device so as to vibrate, and the cylindrical main body of the pyrolysis gas heating device is connected by the vibration device. Since it is configured to slightly vibrate, the heat exchange between the sand and the heated gas is improved by slightly vibrating the pyrolysis gas heating device, which is convenient for heat recovery.
In addition, when a bypass flow path provided with a damper device in parallel with the heating pipe is disposed, the temperature of the heated gas can be controlled very easily by controlling the opening and closing of the damper device, which is convenient. is there.
The present invention has excellent practical utility as described above.
[Brief description of the drawings]
1 is an overall system diagram of a dry distillation pyrolysis melting combustion apparatus for waste according to an embodiment of the present invention.
FIG. 2 is a partially enlarged longitudinal sectional view showing a main part of a dry distillation pyrolysis melting combustion apparatus for waste according to the present invention.
FIG. 3 is an overall system diagram showing an example of a conventional waste carbonization pyrolysis melting and combustion apparatus.
FIG. 4 is an overall system diagram showing another example of a conventional carbonization pyrolysis melting and combustion apparatus for waste.
[Explanation of symbols]
C ... Waste, D ... Pyrolysis residue, G ... Pyrolysis gas, I ... Combustible solid, _IO ... Carbon residue, F ... Molten slag, _G0 ... Combustion exhaust gas, K ... Heating gas, E ... Dust collection Ash, S ... sand, 1 ... supply device, 2 ... dry distillation pyrolysis drum, 3 ... unloading device, 4 ... melt combustion device, 4a ... main body, 4b ... bottom surface, 4c ... gas discharge flow path, 4d ... slag discharge port, DESCRIPTION OF SYMBOLS 5 ... Sorting device, 6 ... Crushing device, 7 ... Waste heat boiler, 8 ... Dust collector, 9 ... Gas purification device, 10 ... Chimney, 15 ... Blower, 16 ... Induction fan, 17 ... Cooling conveyor, 18 ... Combustible Fine powder storage tank, 19 ... heated gas flow path, 20 ... circulating fan, 21 ... heat exchanger, 22 ... oil burner (or gas burner), 23 ... waste pit, 24 ... waste supply crane, 25 ... sand heating Apparatus, 25a ... cylindrical main body, 25b ... sand spout, 25c ... combustion exhaust gas inlet, 5d ... Combustion exhaust gas outlet, 26 ... Pyrolysis gas heating device, 26a ... Cylindrical body, 26b ... Heating pipe, 26c ... Purge nozzle, 26d ... Sand outlet, 26e ... Expansion joint, 26f ... Expansion joint, 26g DESCRIPTION OF SYMBOLS ... Support spring, 26h ... Flexible pipe, 27 ... Sand replenishment silo, 27a ... Sand spreader, 28 ... Sand conveying device, 28a ... Sand removal screw device, 28b ... Bucket conveyor device, 28c ... Screen device, 29 ... Slag water cooling tank , 30 ... Bypass passage, 31 ... Damper device, 32 ... Vibration generator, 33 ... Temperature control device, 34 ... Header, 35 ... Dust ash silo, 36 ... Blower, 37 ... Combustion exhaust gas passage, 38 ... Sand level Total.

Claims (5)

A dry distillation pyrolysis drum that pyrolyzes waste into pyrolysis gas and pyrolysis residue, a melt combustion device that melts and combusts pyrolysis gas and combustibles in the pyrolysis residue, and a downstream side of the melt combustion device A sand heating device that heats sand to recover heat by spraying sand as a heat medium from above into the flue gas from the melting combustion device, and a sand heating device provided at a position below the sand heating device. A pyrolysis gas heating device for heating waste heating gas with high-temperature sand from the device, and a waste heat boiler provided on the downstream side of the sand heating device for recovering the heat of the combustion exhaust gas discharged from the sand heating device; A sand transport device for returning the sand discharged from the pyrolysis gas heating device to a sand spraying port above the sand heating device, and the pyrolysis gas heating device is provided with a sand discharge port below. Arranged in a cylindrical main body and a cylindrical main body A heat pipe, carbonization pyrolysis melt combustion apparatus of waste a portion of the low-temperature heating gas which is arranged below the heating pipes, characterized in that consisted purge nozzle for injecting into the sand. A dry distillation pyrolysis drum that pyrolyzes waste into pyrolysis gas and pyrolysis residue, a melt combustion device that melts and combusts pyrolysis gas and combustibles in the pyrolysis residue, and a downstream side of the melt combustion device A sand heating device that heats sand to recover heat by spraying sand as a heat medium from above into the flue gas from the melting combustion device, and a sand heating device provided at a position below the sand heating device. A pyrolysis gas heating device that heats the heating gas of the waste that circulates in the heating pipe with high-temperature sand from the device, and the heat of the combustion exhaust gas discharged from the sand heating device is provided downstream of the sand heating device A waste heat boiler, and a sand transport device that returns sand discharged from the pyrolysis gas heating device to a sand spraying port above the sand heating device, and a cylindrical main body of the pyrolysis gas heating device. Can vibrate to the cylindrical body of the sand heating device Linked to, the vibratable the carbonization pyrolysis melt combustion apparatus of waste, characterized in that the arrangement for micro-vibration by supporting the vibrating apparatus the body of the pyrolysis gas heating device.   The main body of the sand heating device and the main body of the pyrolysis gas heating device are integrally formed into a vertical cylindrical body, and combustion exhaust gas is introduced upward from the middle portion of the cylindrical body, from the upper portion thereof The waste carbonization pyrolysis melting and combustion apparatus for waste according to claim 1, wherein the waste spray outlet is formed at the uppermost part of the cylindrical body and the sand discharge outlet is formed at the lowermost part. Claim that the sand transport device is composed of a sanding screw device for extracting sand from the pyrolysis gas heating device, a bucket conveyor device for transporting the derived sand, and a screen device for removing foreign matter from the sand. The dry distillation pyrolysis melting combustion apparatus according to claim 1 or 2 . The heating tubes of the pyrolysis gas heating apparatus, by bypass passage which is interposed a damper device, waste of claim 1 or claim 2 and a heating pipe structure communicating with the gas inlet side and gas outlet side Dry distillation pyrolysis melting combustion equipment.

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