JP2003527551A - Coke-fired circulating gas cupola for materially and / or energetically recycling waste of different composition - Google Patents

Abstract

(57) [Summary] In a coke-fired circulating gas cupola for materially and / or energetically recycling wastes of different composition, the lower intake and gas stabilization annular chamber is still completely removed. Arrangements are made to ensure that the intake of gaseous organic substances which have not been decomposed or already recombined into the basic components CO, H ₂ , H ₂ O, CO _{2 and} their trace components is blocked. The lower intake and gas stabilization annular chamber is located down to the surface of the melting and superheating zone formed by the location of the gas jet compressor. Thus, the surplus gas is directly sucked from the furnace tube from the melting / superheating zone having about 2000 ° C. Excess gas is likewise directed through the coke layer in the red-hot molten superheated zone of the coke combustion type circulating gas cupola, CO ₂ is converted to CO by lowering the gas temperature by energy action of Budoaru equilibrium. At the same time, excess gas is fluidly separated from the process gas.

Description

DETAILED DESCRIPTION OF THE INVENTION       [0001]   The present invention is different from that described in JP-A-8-504937.
Coke fuel for material and / or energy recycling of composition waste
It relates to a firing type circulation gas cupola.       [0002]   Conical or conical from the loading hopper to the hearth
And / or the furnace tube of the circulating gas cupola comprising a cylindrical furnace tube part is provided with a circulating gas intake stage.
And one large-capacity intake / gas stabilization annular chamber each in the range of the excess gas intake stage
These annular chambers are provided with a narrow portion whose cross section is gradually narrowed by a furnace tube portion, and
Oxygen direct injection pipe installed inside the furnace and inclined with respect to the melting / superheating zone
It is connected. An additional gas intake is located below the loading hopper,
In the annulus / gas stabilization annular chamber, for peepholes or for installation of spare burners
A short tube section is provided. The lower intake / gas stabilization annular chamber is directly connected to the solids supply port.
It is connected and connected, and is equipped with a short gas intake short pipe and one or more water supply devices.
. The arrangement and configuration of such individual furnace sections may result in different consistency and different softening ranges.
Process for reusing material and / or energy from different loading materials
The gas flow in the area of both gas intake stages, and thus the circulation gas.
Reduced clogging and dust accumulation in the area of the gas inlet and excess gas inlet.
Even if a wet load such as household debris is loaded,
Process proceeds unhindered, and the temperature of 800 ° C
Prevent premature harmful sintering phenomena so that they can be performed without stagnation
Things. In addition, the furnace cylinder in the region of the oxygen nozzle above the excess gas intake stage is locally
Partial narrowing allows for high temperature thermochemical activity characterized by adjustable oxygen supply.
A second zone is formed, which allows the charge to stay longer
This allows the charge to carry out all of the material-specific gasification and degassing processes of the charge.
Can be completed before sinking. Described in JP-A-8-504937
Such a circulating gas cupola does indeed materialize wastes of different composition.
And / or may be advantageously used for energetically reusing
Above the melting / superheating zone formed by the jet compressor
Since the gas stabilization annular chamber is arranged, its basic components CO, H_Two,
H_TwoO, CO_TwoAnd has not been decomposed into their trace components or has already recombined
It is often not possible to prevent the combined gaseous organics from being inhaled. It
Therefore, in order to carry out the process industrially, it is necessary to analyze the excess gas inhaled.
A viewing device is additionally required.       [0003]   The invention relates to the material and / or energy recycling of wastes of different composition
In such a coke combustion type circulating gas cupola,
The arrangement of the gas-stabilized annular chamber is still completely complete with its basic components CO, H_Two, H_TwoO, CO _Two As well as gases that have not been broken down into their trace components or have already recombined
The present invention relates to an improved device for surely preventing the intake of organic substances in a state.       [0004]   This is because the lower intake and gas stabilization annular chamber is located at the position of the gas jet compressor.
It is achieved by being placed down to the surface of the melting / superheating zone formed
Is done. With such an arrangement, excess gas is directly discharged from the melting / superheating zone by about 200 mm.
Air is taken in from the furnace tube at a high temperature of 0 ° C. Excess gas is likewise circulated by coke combustion.
It is led through a red hot coke layer in the melting and superheating zone of the ring gas cupola.
This allows the energy consumption of the Budal equilibrium to reduce CO2_TwoIs low gas temperature
Converted to CO below.       [0005]   At the same time, excess gas is fluidly separated from the process gas. From the loading hopper
The furnace tube that extends conically to the hearth is located below the step surface in the melting and superheating zone.
To increase the amount of coke for the Budal reaction, and
It is also an advantage to ensure a higher efficiency of the new reducing action. Metallurgically,
Therefore, it is possible to dissolve waste materials of different composition in the material and / or energy recycling.
Improvements have been made to the reduction conditions for oxides in the melt phase, which also results in better gold
Generic and slag quality results.       [0006]   For recycling material and / or energetically the waste of different composition
This generation of the lower intake and gas stabilization annular chamber in
The arrangement according to the invention will be described in detail for one embodiment. For this, the attached
The drawing is a longitudinal section from the circulating gas intake stage of the coke combustion type circulating gas cupola to the hearth.
Is shown.       [0007]   FIG. 1 shows that a furnace tube 4 extending conically downwardly below a loading hopper 1 is shown.
To the top of the circulating gas intake stage 2
The gas supply nozzle 3 which is inclined for the purpose is arranged. This gas supply nozzle is shown
It is connected to the pure gas side of a gas regenerator not used or to a separate gas tank.
Circulating gas intake stage 2 has a large volume of intake gas and gas that expands conically upward.
There is a stabilizing annulus 5 which is lined with refractory material 10 to start and stop the process.
It is connected to a water cooling device 6 for stopping. This intake / gas stabilizing annular chamber 5 is
In addition, check the short pipe section 7 for installing a spare burner and / or viewing window, and
It has one or more circulating gas intake pipes 8 with ports 25, which are connected to the pipeline.
Built-in adjustment mechanism, measuring device for determining volume flow and tube expansion
With a compensating element for direct
Connected. Immediately below the intake / gas stabilizing annular chamber 5, a cylindrical furnace tube portion 9 is provided.
The furnace tube is connected so as to reduce its cross section to the area of the excess gas intake stage 11.
One or more lined with fire material 10 and inclined obliquely to the melting / heating zone
Has an oxygen direct injection pipe 13. This furnace tube portion 9 is located in the range of the excess gas intake stage 11.
Is connected to a large-capacity intake / gas stabilizing annular chamber 12 at the lower side. this
A water supply device 15 is provided in the annular chamber 12 or separately from the excess gas intake short pipe 14.
Above the leverage water supply device 15, two airtight closing devices 17, 18 are thrown.
A solid supply section 16 having an input hopper 19 is provided. Excess gas intake short
The pipe 14 is also connected to a gas regeneration unit (not shown) via a transport mechanism (not shown).
The gas regenerator itself is selectively connected to the gas supply nozzle on the pure gas side.
3 is connected. The gas jet is attached to the height of the excess gas intake short pipe 14 in the annular chamber 12.
The outlet of the compressor 24 is connected, and the furnace tube 20 widens downward in a conical shape.
Continues as a truncated cone and is formed cylindrically below the annular chamber 12 with a backing
Has moved to the hearth 21 that has been set. In the hearth, the molten metal outlet 22 and the liquid
An outlet 23 for the slag is provided.       [0008]   Uses a mixture of household garbage fragments, oversized garbage, and organic so-called stabilizers
Processing as described below for re-use of energy and / or energy
Is done. The content of this mixture was 26.7% of ground household waste (I), scrap
31.6% oversized garbage (II) and 18.9% household garbage stabilizer (III)
/ 20-60 mm), 17.2% household waste stabilizer (IV / 0-20 mm), 3.
One charge of 8% coke (V) and 1.8% limestone (VI) as slag material
Become. The main composition of this material is shown in Tables 1-3.       [0009]   The weight per charge is 1000 kg. The furnace is equipped with six circulating gas units,
It has a loading capacity of 7.50 t / h. This furnace is a coke burning vertical furnace
It is made. After charging the floor coke, the furnace is closed and the auxiliary burner and natural
It is ignited through the emergency chimney with the ventilation gas and surplus gas pipeline closed with ventilation.
Oxygen and air are blown after the coke pillars burn to incandescent state. Moth
The air port of the jet compressor 24 is closed, and the circulation gas and excess gas lines are closed.
The lid is opened. Shortly thereafter, the process is started for the first and subsequent loadings.
This is performed until the level mark on the side is reached. All subsequent charges are gasified and burned
And time as a function of dissolution capacity, i.e. as a function of
Be done. The gas jet compressor 24 has a total of 2164 Nm^Three Luck with / h oxygen
Turned. Therefore, 100% or more of the gas from the circulating gas intake stage 2, that is,
There is 3750Nm^Three/ H and 52 Nm taken in via the loading hopper 1^Three / H and the sum of the amount of the sealing gas are sucked and blown into the melting / combustion zone. Or
Also, due to the evaporation products generated when relatively high temperature sealing gas is used.
Is provided on the seal gas pipe. This gas intake section 27 is a gas
It is connected to a regenerator and the vaporized products pass directly through the gas
Guided to the raw device. Because these processes are temperature related in the furnace,
Between the surplus gas step 11 and the circulating gas step 2 in the conical furnace tube 26;
Approximately 50% of the process gas volume and the rest are combusted and thermochemically
Formed by mass conversion, i.e., primarily by combustion of solid carbon potential
It is. 8693 Nm as surplus gas^Three/ H is aspirated and gas regeneration including cracking mill
Guided to the device. The temperature of this gas is 550 ° C. Leave the cracking mill at about 35 ° C
Gas is about 36% H_Two4.6% N_Two, 15.3% CO_Two, 42% CO
And 3.1% H_TwoConsists of O. About 359 l / h of water is condensed. Furthermore, roughly
800 kg / h of molten metal and 1660 that satisfies the conditions for use as a building material
kg / h of slag is produced. After gas purification, 19.48 MW energy equivalent
A purified combustion gas is generated. In addition, about 40 kg / h of decomposed slag and 0.1 kg
8 kg / h of activated coke are formed. These materials create external dust in the system.
As an addition, it is mounted through a gas jet compressor 24 or briquetted.
It is provided through the filling hopper 1 and is slagged and used energetically. water
The cooling device 6 is used as an initial heating of the charged material during normal operation. Starting
This function is used as cooling during stop operation.       [0010]       [Table 1] Elemental analysis (% by mass) Material FeCSCuCudNiAl       Hg Pb Cr As Zn I 3.62 36.21 0.66 0.07 0.01 0.01 0.53       0.00067 0.13 0.03 0.00001 0.20 II 22.98 34.41 0.21 0.02 0.01 0.01 0.18       0.00067 0.04 0.01 0.00001 0.06 III 3.62 36.21 0.66 0.07 0.01 0.01 0.53       0.00067 0.13 0.03 0.00001 0.20 IV 2.53 25.28 0.46 0.05 0.01 0.01 0.37       0.00 0.09 0.02 0.00 0.14 V 90 1 VI       [0011]       [Table 2] Gas component (% by mass) Material H_Two     O_Two     N_Two   C0_Two   Cl_Two   H_TwoO I 4.60 24.48 0.40 0.66 15 II 4.21 27.65 0.26 0.21 10 III 4.60 24.48 0.40 0.66 15 IV 3.21 17.09 0.28 0.46 15 V VI 50       [0012]       [Table 3] Mineral component (% by mass) Material SiO_TwoAl_TwoO_ThreeCaO Mg0 Fe_TwoO_ThreeFeO MnO K_TwoO I 14.7 4.53 4.13 0.6 2.00 0.40 II 5.10 1.52 1.53 0.20 0.70 III 14.7 4.53 4.13 0.6 2.00 0.40 IV 25.9 8.0 7.3 1.1 3.5 0.7 V 3.79 2.48 1.13 0.05 0.75 0.75 0.08 VI 50.00 [Brief description of the drawings] FIG. 1 is a longitudinal sectional view of a cupola according to the present invention. [Explanation of symbols] 1 loading hopper 2 Circulating gas intake stage 3 Gas supply nozzle 4 Furnace tube part spread in a conical shape 5. Large-capacity intake / gas stabilization annular chamber 6 Water cooling system 7 Short tube 8 Circulating gas intake short pipe 9 Furnace tube with local constriction 10 Refractory materials 11 Excess gas intake stage 12 Large capacity absorption and gas stabilization annular chamber 13 Oxygen direct injection tube 14 Excess gas short pipe 15 Water supply device 16 Solids supply section 17 Closure device 18 Closure device 19 Input hopper 20 Frusto-conical furnace part 21 Hearth 22 Molten metal outlet 23 Slag outlet 24 Gas jet compressor 25 Inspection port 26 Conical furnace tube 27 Gas inlet

────────────────────────────────────────────────── ─── Continuation of front page    (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, I T, LU, MC, NL, PT, SE), AU, BR, B Y, CA, CN, CZ, EE, FI, HU, JP, KR , LT, LV, MX, NO, NZ, PL, RO, RU, SI, SK, UA, US (71) Applicants Scheidegg, Claus             Federal Republic of Germany Day-07338 Cowl             Sudolf am Wachhugel 7 (72) Inventor Voistel, Hans Ulrich             Federal Republic of Germany Day-04277 Leip             Chich an der Marchenwiese               72 (72) Inventors Maron, Joachim             Germany Day-04466 Leip             Chich Verlengerte Schwede             Strasse 36 (72) Inventor Schaaf, Michael             Federal Republic of Germany Day-04430             Kumarsdorf Alte Dorfstra             -5 (72) Inventors Scheidwig, Claus             Federal Republic of Germany Day-07338 Cowl             Sudolf am Wachhugel 7 F term (reference) 4K001 AA10 DA10 FA14 GA01 GB03                       HA10 HA12                 4K045 AA02 BA01 GA05 GB11 GB12

Claims (1)

Claims: 1. A vertical furnace tube extending conically from a loading hopper toward a hearth, and a plurality of furnace gases disposed around the furnace tube and below the loading hopper. An inlet port, the furnace gas inlet port being connected through a passage with a nozzle located in the region of the melting and superheating zone on the hearth, the nozzle having a centrally introduced oxygen injection pipe and a gas inlet. The furnace cylinder operates as a jet compressor, and has a large-capacity intake / gas stabilization chamber in the range of a circulating gas intake stage and a surplus gas intake stage. Materialized waste of different composition, which is connected to an oxygen direct injection pipe incorporated therein and inclined with respect to the melting and superheating zone, and an additional gas intake is disposed immediately below the loading hopper. And / or energy In a coke-fired circulating gas cupola for recycling in a lug-like manner, an excess gas intake stage (11) and a large-capacity intake / gas stabilization chamber (12) are formed by the position of a gas jet compressor (24). -A coke-fired circulating gas cupola, which is disposed below the surface of the superheat zone.