JPS5813916A - Melting method for waste - Google Patents

Abstract

PURPOSE:To stably perform melting of waste and exhaust of molten waste in an apparatus for melting waste or the intermediate product of the waste in a high temperature hearth made of carbonaceous combustible substance by specifying the quantity of supplied oxygen to each section and the temperature of each section. CONSTITUTION:A high temperature hearth 2 made of carbonaceous combustible substance is formed at a melting furnace 1, and industrial waste or its intermediate product from a hopper 3 is incinerated and molten at the upper part of the furnace. Combustion waste gas is exhausted through a rising temperature passage 7 and a passage 8 connected to the lower part of the hearth 2. In this melting method, the superficial velocity of rising gas in the hearth 2 is set to 15-60Nm<3>/m<2>.min, and exhaust gas temperature of the passage 8 is set to higher than 1,350 deg.C. Further, the quantity of supplied combustible substance is adjusted so that the quantity of O2 to the hearth 2 becomes 0.8-1.2 times of theoretical oxygen quantity of the carbonaceous combustible substance supplied to the hearth 2, and exhaust gas afterburning air containing predetermined quantity of O2 is supplied to the passage 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes various industrial waste materials such as sewage sludge, or intermediate geological materials that have been previously dried, incinerated or pulverized as necessary, for landfilling. At times, the decision was made to prevent heavy metals from escaping9, or to incinerate and melt them so that they could be used as aggregates for mine construction.
At the top of the high-temperature hearth formed by combustible materials, the temperature rises to 10! , by supplying oxygen-containing gas for combustion to a 1mf high bed to incinerate and melt industrial waste or its medium-sized waste, and discharge the combustion exhaust gas to the bottom of the 11-meter connected to the bottom of the waste waste melter. The purpose of this method is to ensure combustion in a high-temperature hearth, descent of molten material, and removal of fg whale material, and to prevent dust flying and PIJ! Damage can be suppressed, and in addition, odor components and harmful components in the combustion exhaust gas can be stably decomposed by combustion, and the amount of Nox (m# oxides) in the combustion exhaust gas can be reduced, making it possible to operate the furnace as a golden cup. Tofu pull prevention rk
The point is that it provides an extremely effective method for J and Kosho prevention songs.

Next, the operation of zero firing will be explained with reference to illustrative diagrams.

A blast hearth (2) made of highly combustible material is formed in a cupola type melting furnace 111, and f
On the i4 wet floor (!j), open and close Gumper (4m) and (4b) each other, and mix the intermediate treated material of IR1 Mulberry 6 Rui So, with the IQ Itomachi Fuel Award. A layer of vertical combustible materials and magic materials, or potted materials in between, is formed on the high-temperature hearth (2), and then high-temperature water is supplied from the 981 tuyere (@) below. Supplying an acidic bulk-containing gas such as air to the hearth tel, burning and melting the Shimokuwa product or its intermediate processed product in the upper part of the high temperature hearth (2),
Then, the combustion exhaust gas is discharged to the ascending flow path (7) formed above the high temperature hearth (2) and the lower flow path (8) connected to the lower part of the high temperature hearth +21, and the melt t
-n is taken out to the furnace body (9) through the lower channel (8), and the melt t%l and 182 slag outlet (LOM) taken out to the furnace body (9).

(10b), and the combustion exhaust gas generated from the high temperature hearth (2) is collected in one packed bed (6) t.
- In order to burn and decompose the odor components and harmful components generated during the passage, post-combustion is carried out in the ascending flow path (7) by ## government-owned gas such as air supplied from the second tuyere till. That's how it is.

The combustion exhaust gas from the above-mentioned rising K m ff) is discharged into the atmosphere by removing the exhaust duct ring connected to the top of the furnace, the dust removal cyclone 0, and the first heat exchanger Glow A9, and P body (
9) The combustion exhaust gas is discharged into the atmosphere by passing through the first exchanger ring and the first blower. Further, the oxygen-containing gas supplied through the second blower at the eleventh second separate port (6) is supplied to the heat exchanger Q41.
It is designed to be added at .

Also, the 8th prowa scream and the 1iJ note! The pigeon with one tuyere (6) is installed with a next flow of 1 ktlJ (Vt), an abortion control valve installed between the ascending flow path 7) and the lower sfi * (11) and the first blower (to). (V J-(V s) 0Ni
lK Yoste, the rising gas superficial velocity of the above l1ii & hearth (2) circle is IS~6ONm/m-m (HmaL<tig
G to 40 Nd/dm), and the temperature of the exhaust gas in the lower flow path (8) of IIJ is maintained at 11,850°C or higher. Tuyere, 1st tuyere 16
) and the amount of gas supplied from Sunsakuura, and by dividing the rising flow path (7) and the lower flow path ('81) by 1 km from the Shingas gorge, the high-temperature hearth ( 2) By burning the rising gas sky column jkK is low: iIk
If the molten material is in a high-temperature furnace! (It suppresses palindromic viscosity, and when the exhaust gas in the lower flow path has a low excess, the melt flows into the lower flow path (
8) Lowering and taking out the molten material by suppressing the viscosity in the t It is possible to prevent this from happening.

Rumor has it that the high-temperature bed (phantom truth FiH1k+s+~10-dashi, the vertical distance between the first tuyere (6) and the lower S channel (8) is 20 to 50 tres, 111 Ik!, lower part) Flow path (9L of exhaust gas in season is 0.6 to 8N-/-6).

In addition, Aya Soi, which is supplied to the high-temperature hearth (sag), is a vertical cable system combustible material supplied to the high-temperature hearth (sag).
suddenly o o, s ~ Ls times (!il casing L<Fitl, 96
~105 times), the supply amount t of the R cord system material is
S + clause. In other words, when there is too much carbon, the temperature of the combustion exhaust gas decreases due to the ring element reaction between carbon and 8-saponified carbon. By burning it in the hearth (21k appropriate state cram school), you can efficiently dispose of potted plants at #ll14111 or somewhere in between.

In addition, if the temperature of the next rising gas is 400℃ to 1♀00℃ (mfL<ti700℃
to 1,000° C.), the supply amount of the Koqin product or the intermediately processed product is set at t. In other words, if the gas #IA degree is too high, the scattered dust may fall onto the furnace wall and damage the furnace wall, and the above-mentioned 5 ascending flow path (7
) Due to the heat generated during after-combustion in the furnace
The inconvenience of heat loss can be suppressed, and in addition, if the gas Ii draw is too low, the inconvenience of not being able to stably decompose the abhorrent components and ml in the exhaust gas due to sIIIJ post-combustion, resulting in the inconvenience of YtIQ + vice. be.

In addition, m volume supplied from the second tuyere (2) into the IQ Kijo valve passageway (7) is supplied from the first tuyere (6) to the high temperature hearth (!l). The sum of the amount of oxygen and the combustion process of the supplemented coal-based fuel material - Sunsugaro and the combustion of the pre-arranged corpses or seven medium-processed materials P @ eclipse oxygen LO~, the flow control valve (V4), J
Adjust by. In other words, it is possible to suppress the inconvenience that the post-IIIJ combustion cannot be performed properly when the amount of oxygen supplied to the second tuyere is too small, and also to reduce NOx when the amount of oxygen supplied is too large. This makes it possible to suppress the inconvenience that tends to occur in large quantities.

The present invention is applicable to sewage sludge, human waste sludge, factory wastewater treatment sludge, water treatment plant sludge, and activated! It is suitable for processing sludge, etc., but it can also be used for various brittle materials such as 411 city garbage, its incineration ash, and various industrial waste, and it can also be used for crushing, drying, granulation, etc. Medium iI obtained by applying spoon M of gong etc.
J can also be applied to potted plants.

Also, use #! The furnace can be made of various types of cedar. The gs8 diagram shows an example of the axial hearth 1
The side walls for 138 minutes are shaped into 18-fold pipes and a water-cooled jacket (2) is formed.In front of the high-temperature hearth, 111 tons of carbon-based combustible material is mainly used. However, various materials such as AM bandits, graphite electrode scraps, etc. may also be used.

Furthermore, as mentioned above, the oxygen gas supply ili◆ to the carbon-based circuit (7) to the optical layer (6) can be adjusted manually or automatically by an appropriate control mechanism. You can also have them do it.

In summary, the present invention provides the above-mentioned magic material melting method,
The high temperature hearth (increasing gas tower speed in 21 is 115 to 60
The temperature of the exhaust gas in the lower flow % 1111 is maintained at t-1850°C or higher, and the temperature is maintained at 1 (l)
AC! , so that M - the oxygen supplied to the hearth i2J - is 0.8 to U times the amount of theoretical acid 1# for smoking the smoldering material supplied to the high temperature hearth (2). , the amount of replenishment of the carbonaceous town fuel tank is adjusted, and the i
So that the temperature of the rising gas that electrified the packed bed (5) of the i*s Qinmono or Intermediate Processing Product would be between 400°C and 1800°C! The amount P of the industrial waste or intermediate treatment material is set to t, and is supplied to the gas 1 containing the flue gas for post-combustion in the ascending channel (7) indicated by -q, and the ascending channel (7) ) The sum of the oxygen supplied to the high temperature furnace body (2) and the amount of oxygen supplied to the high temperature furnace body (2) is 1ζJ.

The method is characterized in that the theoretical amount of oxygen for combustion is adjusted to be 1.0 to 1 dew times the phase of the theoretical amount of oxygen for combustion of the industrial waste or its intermediate treatment product. In other words, the air quality of the rising gas in the high-temperature hearth (2) is 16
By maintaining the temperature at ~40 Nm/m-1, the melt can descend smoothly while maintaining the high mud hearth (! In addition, the lower flow path (81
Increase the humidity of exhaust gas to 1850℃ or higher #! By holding it, the tg-object can be taken out effectively.

Moreover, the amount of oxygen supplied to the 7t4 hot hearth + 21 or the combustion of carbon-based combustible materials replenished to the high temperature hearth (2)
By adjusting the replenishment wrinkle of carbon-based combustion material so that it is 0.8 to L2 times the amount of i2 detonation, the combustion exhaust gas can be suppressed to a low level of 1 ton, making it a magical object or a medium F#J. This allows us to efficiently map out local objects.

Besides,! ii) Oxygen-containing gas for combustion is supplied to the combustion exhaust gas in the ascending passage (7), and also to the wood supplied in the ascending passage (7), and to the high-temperature furnace body (!). The sum of the amount of oxygen is in front! , Adjust so that it is LO to L2 times the phase of the coal cliffs, the field for burning combustible materials, and the amount of excavation, and the amount of m canopy, Aya'11'IIL, of the lO Kiyogyo Island vehicle or its intermediate treatment. i! in the supply gas by Even if # is included, N in the combustion exhaust gas
It is possible to post-combust the combustion exhaust gas so as to burn and decompose the gaseous components and 4 apricot components (- urea oxide, - water bulk, etc.) stored therein while imparting OXk't energy. It can be done.

moreover,! iQ 11ll-Industry # that sells above the hearth (2)! The next rising gas passes through the packed bed (6) of the first product or intermediate product! Ij11uO℃ to xg
oo'crc, birth j1! The above-mentioned after-combustion can be carried out well by adding one lid of footwork or intermediate processing material, and one lid is M* of dust.
This can prevent damage or heat loss to one wall.

In short, it has become possible to perform the process well and stably with a condition that is advantageous for preventing fg melting and rotting of corpses, and a lying motion that is advantageous for preventing the heating process from pulling. Ta.

A simple example of the drawings illustrates the difficulties in implementing the drug melting method. It is a schematic exposure diagram of a furnace.

(21...1i6 hearth, +61...
Filled bed, (1)...Top f#ate, (81・-
-7r s a wh.

Ward 1 Figure 2 Kinuta b ′　・°Dinear、：・：】′　　　Ro 2. . .

6 °°°°2 1/’”’’＼8

Claims (1)

[Claims] In the upper part of the high-temperature hearth (2) formed by vertical cable combustible materials, incinerate and elute industrial waste or the middle j & 1 m* by supplying oxygen-containing gas for combustion to the hearth (2), An upward flow path () formed above the high humidity hearth (2) for the combustion exhaust gas 1
) and 1TJk! , a method for discharging corpses into a channel (8) connected to the lower part of a high-temperature hearth (2),
k! , the superficial velocity of the rising gas in the high-temperature hearth (!J is 15 to 6
ON-～・- has m, IQ&! , the temperature of the exhaust gas in the lower flow path (8) is raised to 1B50°C or higher, and the amount of oxygen supplied to the high-temperature hearth (phantom) is replenished to the high-temperature hearth (!). - 0.8~L of dedication amount
Divide the amount of carbon-based 1 material so that it is doubled, and 1
111 The industrial waste is placed above the high-grade furnace (2) so that the temperature of the rising gas that has passed through the packed bed (-1) of chestnut industry products or intermediate processing products is between 400℃ and 1200℃. The P supply amount of mulberry or intermediate g & tj!! is - clause,
A bulk-containing gas for post-combustion of the fuel hood gas is supplied into the ascending channel (7), and oxygen mt1 is supplied into the ascending channel (7) and supplied to the high-temperature furnace body. The sum of the amount of oxygen is LO to Ls times the sum of the theoretical oxygen amount for burning #a of the vertical line combustible material listed in ltj and the amount of sediment for burning the combustible vehicle or its intermediate treatment product. The m*thing@ken method is characterized by adjusting it so that it becomes the same.