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Combustion and flue gas treatment system and SOx removal unit

A gas treatment system and flue technology, applied in gas treatment, combustion product treatment, waste heat treatment, etc., can solve the problems of polluted flue gas, catalyst deactivation, etc.

Inactive Publication Date: 2016-03-09
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In fact, at the heat exchanger 4, oxygen slip (i.e. oxygen into the flue gas) can occur; this is disadvantageous because oxygen contaminates the flue gas and must be removed in order to obtain high purity carbon dioxide
[0010] Furthermore, since NO x The removal unit 3 is immediately downstream of the furnace 2, so deactivation of the catalyst typically occurs

Method used

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  • Combustion and flue gas treatment system and SOx removal unit
  • Combustion and flue gas treatment system and SOx removal unit
  • Combustion and flue gas treatment system and SOx removal unit

Examples

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Embodiment Construction

[0043] Reference is made to the drawings, which illustrate a combustion and flue gas treatment system 1 comprising a furnace 2 (eg, part of a boiler) for combusting fuel and oxidant to generate flue gas.

[0044] In different examples, the fuel can be gas, liquid or solid fuel, but preferably the fuel is solid fuel such as coal, lignite, etc.; the oxidant can also be any, but preferably it is pure or approximately pure oxygen or oxygen-enriched air. Pure or substantially pure oxygen may be preheated before being supplied into the furnace 2 .

[0045] The system 1 also has ducts 15 for conveying flue gas between different units performing different processes. Specifically, conduit 15 is connected to the NO x remove unit 3 and SO x Remove unit 6, where SO X The removal unit 6 is located at NO with respect to the flue gas flow x Remove unit 3 upstream. For example, SO x SO removed from unit 6 x The removal efficiency exceeds 60%, and preferably exceeds 80%.

[0046] The s...

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Abstract

The combustion and flue gas treatment system (1) comprises a furnace (2) for combusting a fuel with an oxidizer generating a flue gas, ducting (15) for the flue gas connected to a NO x removal unit (3) and a SO x removal unit (6), a recirculation line (11) for recirculating a part of the flue gas back to the furnace (2). The SO x removal unit (6) is located upstream of the NO x removal unit (3) with reference to the flue gas flow, and the recirculation line (11) is connected to the ducting (15) downstream the SO x removal unit (6).

Description

technical field [0001] The present invention relates to a combustion and flue gas treatment system and SO x Remove the unit. [0002] For example, the system may be part of a power station or a factory; any instance of the system is possible anyway. Background technique [0003] figure 1 Combustion and flue gas treatment systems are shown, such as those typically used in power stations; system 1 has a furnace 2 (eg, part of a boiler) where fuel is mixed with an oxidant (eg, oxygen or rich oxygen air) combustion. [0004] Flue gases produced in Furnace 2 proceed to NO x Removal unit 3, e.g., SCR, where the flue gas is contained in relation to the NO x Remove reagents by backwashing with water. The flue gas then passes through a heat exchanger 4 where it is cooled and then proceeds to a dedusting unit 5 such as a filter or an electrostatic precipitator. [0005] Take away NO x The cooled flue gas with dust then passes through the SO x Remove unit 6, where the flue gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F23J15/02B01D53/50B01D53/83
CPCB01D53/508B01D53/75B01D53/83B01D53/8625B01D53/869B01D2251/404B01D2257/302B01D2257/402B01D2257/404B01D2258/0283B01D2259/128F23J15/006F23J15/022F23J15/04F23J2215/10F23J2215/20F23J2219/40F23J2219/60Y02C20/10B01D53/50F22D1/02
Inventor O.斯塔尔曼恩W.王E.W.贝斯
Owner GENERAL ELECTRIC TECH GMBH