Process for the disposal of residual substances from waste incineration plants as well as activated coke and/or activated carbon

• US 5,771,822 A
• Filed: 11/22/1995
• Issued: 06/30/1998
• Est. Priority Date: 12/03/1994
• Status: Expired due to Fees

• Current Assignee: Metallgesellschaft AG (GEA Group AG)
• Original Assignee: Metallgesellschaft AG (GEA Group AG)
• Inventors: Rizzon, John
• Primary Examiner(s): Bennett, Henry A.
• Assistant Examiner(s): TINKER, SUSANNE CHRISTINE
• Application Number:
  US08/561,649
• Time in Patent Office: 951 Days
• Field of Search: 110/165 A, 110/259, 110/344, 110/346, 588/205, 588/231
• US Class Current: 110/346
• CPC Class Codes: B09B 3/0066 Disposal of asbestos
• CPC Class Codes: C03B 3/00 Charging the melting furnaces
• CPC Class Codes: C03B 5/005 of glass-forming waste materials disposal or transformation of solid waste in general B09B; treatment of radioactive waste G21F9/00
• CPC Class Codes: C03B 5/12 in shaft furnaces C03B5/02 takes precedence
• CPC Class Codes: F23G 2201/301 Treating pyrogases
• CPC Class Codes: F23G 2201/302 Treating pyrosolids
• CPC Class Codes: F23G 2201/303 Burning pyrogases
• CPC Class Codes: F23G 2201/304 Burning pyrosolids
• CPC Class Codes: F23G 2201/602 different sizes
• CPC Class Codes: F23G 2201/70 Blending
• CPC Class Codes: F23G 2201/80 Shredding
• CPC Class Codes: F23G 2202/102 with supplementary heating
• CPC Class Codes: F23G 2202/103 in separate chambers
• CPC Class Codes: F23G 2202/20 to temperatures melting waste
• CPC Class Codes: F23G 2203/212 Sealing arrangements between rotary and stationary parts
• CPC Class Codes: F23G 2205/14 using hopper or bin
• CPC Class Codes: F23G 2205/18 using airlock systems
• CPC Class Codes: F23G 2209/12 Sludge, slurries or mixtures of liquids
• CPC Class Codes: F23G 2209/28 Plastics or rubber like materials
• CPC Class Codes: F23G 2900/50002 Burning with downwards directed draft through the waste mass
• CPC Class Codes: F23G 5/006 : General arrangement of incineration plant, e.g. flow sheets
• CPC Class Codes: F23G 5/085 : High-temperature heating means, e.g. plasma, for partly melting the waste
• CPC Class Codes: F23J 15/003 : for supplying chemicals to fumes, e.g. using injection devices
• CPC Class Codes: F23J 2219/10 : Catalytic reduction devices
• CPC Class Codes: F23J 2219/80 : Quenching
• CPC Class Codes: F23L 2900/07005 : Injecting pure oxygen or oxygen enriched air
• CPC Class Codes: Y02E 20/34 : Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
• CPC Class Codes: Y02P 40/50 : Glass production, e.g. reusing waste heat during processing or shaping

Abstract

The present invention describes a process for the disposal of residual substances from waste incineration plants as well as activated coke and/or activated carbon. For this purpose the residual substance as well as activated coke and/or activated carbon is introduced into the annular shaft (3) of the primary chamber (2) of the furnace (1). In the primary chamber (2) a temperature of 1250° C. to 1500° C. is set. The molten material flowing off leaves the primary chamber (2) together with the flue gases through the central outlet (4). The molten material is passed through the secondary chamber (5) and is discharged as slag. The present invention furthermore describes an apparatus for such process, where in the furnace roof (10) of the primary chamber (2) of the furnace (1) one or several burners (7) are disposed and at one or several points (22) of the furnace roof (10) secondary air is introduced into the primary chamber (2) and at one or several points (23) of the furnace roof (10) tertiary air is introduced into the primary chamber (2).

Claims

1. A process for the disposal of residual substances from waste incineration plants as well as at least one of activated coke and activated carbon by surface-melting of a furnace charge where

a) the residual substance is introduced into the primary chamber (2) of the furnace (1),

b) at least one of the activated coke and activated carbon are comminuted to a grain size<

1 mm and are directly blown into the primary chamber (2) via a burner (7),

c) in the primary chamber (2) a temperature of 1250°

C. to 1500°

C. is set, d) a molten material flowing off from the surface of the furnace charge leaves the primary chamber (2) together with flue gases, the molten material is passed through a secondary chamber (5) and is discharged as slag.

2. The process as claimed in claim 1, wherein in accordance with process step (c) a temperature of 1300°

C. to 1400°

C. is set.

3. The process as claimed in claim 1, wherein at least one of the activated coke and activated carbon are mixed with rust ash, and the mixture including the residual substance is introduced into the primary chamber (2) or the mixture is directly introduced into the primary chamber (2).

4. The process as claimed in claim 3, wherein rust ash is separated from iron-containing substances in a magnetic separator, the rust ash separated from iron-containing substances is screened, where a coarse fraction having a grain size>

50 mm is separated and a fine fraction having a grain size<

50 mm is introduced into the primary chamber (2).

5. The process as claimed in claim 3, wherein the fine fraction having a grain size<

50 mm is screened and a fraction having a grain size of 2 mm to 50 mm is separated and a fraction having a grain size<

2 mm is introduced into the primary chamber (2).

6. The process as claimed in claim 1, wherein in the primary chamber (2) an excess-air coefficient of λ

=0.7 to λ

=1.3 is set.

7. The process as claimed in claim 1, wherein oxygen-enriched air is introduced into the furnace (1).

8. An apparatus for the disposal of residual substances from waste incineration plants as claimed in claim 1, where in the furnace roof (10) of the primary chamber (2) of the furnace (1) one or several burners (7) are disposed and at one or several points (22) of the furnace roof (10) secondary air is introduced into the primary chamber (2) and at one or several points (23) of the furnace roof (10) tertiary air is introduced into the primary chamber (2).