Reduction of byproduct-gas emissions from a coking-oven chambers

Patent metadata

Field	Value
Publication number	US-9487709-B2
Application number	US-201214000208-A
Country	US
Kind code	B2
Filing date	Feb 8, 2012
Priority date	Feb 16, 2011
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

The invention relates to a method of reducing emissions of byproduct gas when charging oven chambers of a battery of coking ovens, on the proviso that the oven chamber ( 1 ) to be charged is opened on the machine side (MS) of the battery of coking ovens, and a block of compressed coal ( 10 ) is introduced into the opened oven chamber ( 1 ). Byproduct gases released during introduction of the block of compressed coal ( 10 ) into the hot oven chamber ( 1 ), are discharged through a byproduct-gas manifold ( 11 ) attached to the oven chamber ( 1 ) and are then preferably freed of dust and incinerated. Crude gases formed in the closed oven chambers during coking are discharged through a crude-gas manifold ( 3 ) attached to the oven chambers ( 1 ) and are passed on for treatment by at least one gas scrubber. According to the invention, conduits connecting the crude-gas manifold ( 3 ) and the byproduct-gas manifold ( 11 ) to the oven chambers ( 1 ) are alternately opened and closed such that the byproduct gases that form during the charging of the oven chambers ( 1 ) are admitted only into the byproduct-gas manifold ( 11 ), and that the crude gases that form during coking in the closed oven chambers are fed only into the crude-gas manifold ( 3 ).

First claim

The invention claimed is:

1. A method of reducing byproduct-gas emissions when charging hot oven chambers of a coke-oven battery with compressed-coal blocks, the method comprising the steps of:
opening the hot oven chamber to be charged on the machine side of the battery and introducing a block of compressed coal into the opened oven chamber such that byproduct gases are released,
conducting the byproduct gases released in the open chamber and during the introduction of the block of compressed coal into the hot oven chamber to a byproduct-gas manifold connected to the open chamber while preventing introduction of the byproduct gas into a crude-gas manifold connected to the chamber,
withdrawing the byproduct gases from the byproduct-gas manifold and removing dust from and incinerating the withdrawn byproduct gases,
thereafter closing the hot chamber, coking the block in the hot chamber, and thereby forming crude gas,
conducting crude gases formed during coking inside the closed oven chamber through the crude-gas manifold separate from the byproduct-gas manifold to a gas-treatment system that has at least a gas scrubber while preventing introduction of the crude gases into the byproduct-gas manifold.

2. The method according to claim 1 , wherein the byproduct gases are aspirated into the byproduct-gas manifold by pressure control in the byproduct-gas manifold.

3. The method according to claim 1 , wherein the byproduct gases are dedusted in to a stationary dust removal station.

4. The method according to claim 1 , wherein the byproduct-gas manifold is connected to a byproduct-gas aspirating car that is able to travel along the battery for aspirating the byproduct gases.

5. The method according to claim 1 , wherein blocking dampers and slides with temperature-resistant blocking elements are used for closing the conduits that connect the oven chambers to the byproduct-gas manifold.

6. The method according to claim 1 , wherein the byproduct-gas manifold extends as a collecting pipe along the battery of coke oven chambers and is connected by respective conduits with flow blockers to the oven chambers of the battery, the flow blockers being water-immersion means that are opened or closed from the outside in order to open or block the gas path.

7. The method according to claim 1 , further comprising the step of:
individually controlling the pressures inside the closed coke oven chambers during coking.

8. The method according to claim 7 , wherein the crude-gas manifold extends as a collecting pipe along the battery of coke oven chambers and is connected by respective conduits with flow blockers to the oven chambers of the battery, the flow blockers each have a water-filled dip cup as well as a dip pipe connected to the gas-carrying conduit, the fluid level within the dip cup is controlled, and the gas path is thereby opened and blocked.

9. The method according to claim 1 , wherein control organs made of temperature-resistant elements are used with or without water immersion in order to maintain predetermined pressure values inside the oven chambers.

10. A method of operating a coke-oven battery having a hot coking chamber with
at least one closable door through which a compressed-coal block can be passed,
a closable connection to a crude-gas manifold, and
a closable connection to a byproducts-gas manifold, the method comprising the steps of:
opening the door of the chamber and pushing a compressed-coal block into the chamber such that the block and ambient oxygen together create byproduct gases in the chamber;
while the door is opened, aspirating the byproduct gases from the chamber into the byproduct-gas manifold while preventing the byproduct gases from entering the crude-gas manifold;
withdrawing the aspirated byproduct gases from the byproduct-gas manifold and dedusting and combusting the withdrawn byproduct gases;
closing the door when the block is inside the chamber such that oxygen no longer is admitted into the chamber;
thereafter coking the block in the chamber to generate crude gas while aspirating the crude gas into the crude-gas manifold and preventing the crude gas from entering the byproduct-gas manifold; and
withdrawing the aspirated crude gas from the crude-gas manifold and scrubbing the withdrawn crude gas.

11. A coke-oven battery comprising:
a plurality of hot oven chambers arrayed next to each other and having doors on a machine side and on a coke side,
a pusher machine movable on the machine side along the battery, and
a crude-gas manifold for discharging crude gases that form during coking inside the closed oven chambers,
means for introducing a block of compressed coal by the pusher machine into an oven chamber that is open on the machine side, and after the coking process for removing coke from the oven chamber that is open on the coke side,
a separate byproduct-gas manifold for the discharge of byproduct gases released during the introduction of the compressed-coal blocks into the hot oven chamber, and
flow blockers connecting the byproduct-gas manifold and the crude-gas manifold to the oven chamber and to the byproduct-gas manifold and the crude-gas manifold, the flow blockers being alternately actuated such that the byproduct gases that form when charging the oven chambers are only conducted to the byproduct-gas manifold and not to the crude-gas manifold and the gas-treatment system and the crude gases that form for during the coking action inside the closed oven chambers are only conducted to the crude-gas manifold; and
means connected to the byproduct-gas manifold for removing dust from and incinerating the byproduct gases.

12. The cokeoven battery according to claim 11 , wherein the means connected to the byproduct-gas manifold is a byproduct-gas aspirating car for aspirating the byproduct gases that travels along the battery of coke ovens and that can be connected to the byproduct-gas manifold of an oven chamber to be charged with coal.

13. The battery of coke ovens according to claim 12 , wherein the byproduct-gas aspirating car has a combustion chamber for incinerating the byproduct gases.

14. The battery of coke ovens according to claim 11 , wherein the flow blocker of the byproduct-gas manifold is configured as a blocking damper or slider and has a temperature-resistant blocking element.

15. The battery of coke ovens according to claim 11 , wherein the byproduct-gas manifold extends as a collecting pipe along the battery of coke ovens and is connected via respective conduits with flow blockers to the oven chambers of the coke oven batteries, the flow blockers having water-immersion means that can be opened and closed from the outside in order to free or block gas flow.

16. The battery of coke ovens according to claim 11 , wherein the byproduct-gas manifold extends along the battery of coke ovens on the coke side, and the crude-gas manifold extends along the battery of coke ovens on the machine side.

17. The battery of coke ovens according to claim 11 , wherein the byproduct-gas manifold extends along the battery of coke ovens on the machine side, and the crude-gas manifold extends along the battery of coke ovens on the coke side.

18. The battery of coke ovens according to claim 11 , further comprising:
an arrangement made up of the byproduct-gas manifold and the crude-gas manifold is disposed as a system component either on the machine side or the coke side of the battery of coke ovens.

Assignees

• Reinke Martin
• Thielert Holger
• Worberg Rainer
• Thyssenkrupp Uhde Gmbh

Inventors

• Reinke Martin
• Thielert Holger
• Worberg Rainer

Classifications

• C10B27/04 Primary

  during the charging operation of the oven · CPC title

• C10B31/10 Primary

  with one compact charge · CPC title