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Method and device for exhaust gas purification

A technology of exhaust gas and catalyst, applied in the field of devices implementing the method

Active Publication Date: 2016-09-28
化学热处理技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] A further major disadvantage is that, in the known process with three regenerators, if a uniformly extruded material or corrugated SCR catalyst made of relatively soft material is to be used instead of the significantly more expensive coated SCR-catalytically active For washcoat ceramic honeycomb heat exchangers, at least three grids per regenerator are necessary for structural reasons

Method used

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  • Method and device for exhaust gas purification
  • Method and device for exhaust gas purification
  • Method and device for exhaust gas purification

Examples

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Embodiment Construction

[0062] according to figure 1 , the regenerative thermal afterburner has two regenerators A and B connected by means of a common combustion chamber 1 to a burner 2 or an electric heating. In the combustion chamber 1 in which the temperature is eg 900° C., the exhaust gas is thermally purified.

[0063] Regenerators A and B are each divided into two in the flow direction. That is to say they each consist of a lower section A' and B' facing away from the combustion chamber 1 and an upper section A" and B" facing the combustion chamber 1 respectively. Sections A', A", B' and B" are each filled with heat storage bodies 3.

[0064] The two sections A', A" and B', B" of each regenerator A and B are connected to each other by means of pipes 4 and 5 respectively, each provided with shut-off valves V-5A and V-5B.

[0065] The two regenerators A and B have a common SCR catalyst 6 .

[0066] For this purpose, the upper sections A" and B" are connected at their lower ends to the pipe ...

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Abstract

For the purification of exhaust gases containing nitrogen oxides combined with CO, VOC or nitrous oxide, in particular from the production of cement clinker, nitric acid, adipic acid, fertilizers and uranium trioxide, a regenerator with at least two (A,B) Regenerative thermal after-combustion system by means of which CO, VOC and nitrous oxide are thermally purified in the combustion chamber (1) at a temperature of 800 to 1000 °C and Compounds thermally reduce nitrogen oxides with an SCR catalyst (6), where the thermally purified exhaust gas is removed from the corresponding two-part regenerator (A or B) at a temperature of about 300 °C at a suitable location via the SCR The catalyst (6) is directed in a fixed flow direction and then fed back to the remaining section (A', B') of the regenerator (A or B).

Description

technical field [0001] The invention according to the preamble of claim 1 relates to a method. The invention also relates to a device for carrying out the method and to the use of the device. Background technique [0002] The combination of a regenerative thermal afterburner system with selective catalytic reduction (SCR) is known from DE 19905733 B4. In this method, SCR catalyst materials are each disposed on a regenerative heat exchanger material, thereby achieving thorough catalytic denitrification with high thermal efficiency when adding a reductant at the regenerator inlet. However, this method does not allow the simultaneous purification of organic components because the temperature above the catalyst is not sufficient to thermally oxidize organic contaminants. [0003] A method for purification of exhaust gases according to the preamble of claim 1 is known from EP 472 605 B1 in which the regenerator is divided vertically into three sections ( FIG. 4 ). First, the e...

Claims

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Application Information

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IPC IPC(8): B01D53/34B01D53/38B01D53/86F23G7/06F28D17/00
CPCB01D53/343B01D53/38B01D53/8625F23G7/068F28D17/00B01D2251/206B01D2251/2062B01D2251/2067B01D2257/402B01D2257/406B01D2257/502B01D2257/708B01D2258/0233B01D2259/655Y02C20/10F28D17/005F28D17/04Y02P20/30B01D53/869F01N3/2066
Inventor 克里斯蒂安·穆勒德
Owner 化学热处理技术有限责任公司
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