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1. WO2013049058 - DRY SORBENT INJECTION DURING NON-STEADY STATE CONDITONS IN DRY SCRUBBER

Publication Number WO/2013/049058
Publication Date 04.04.2013
International Application No. PCT/US2012/057111
International Filing Date 25.09.2012
IPC
B01D 53/56 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
34Chemical or biological purification of waste gases
46Removing components of defined structure
54Nitrogen compounds
56Nitrogen oxides
CPC
B01D 2251/404
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2251Reactants
40Alkaline earth metal or magnesium compounds
404of calcium
B01D 2251/604
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2251Reactants
60Inorganic bases or salts
604Hydroxides
B01D 2258/0283
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2258Sources of waste gases
02Other waste gases
0283Flue gases
B01D 53/505
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
34Chemical or biological purification of waste gases
46Removing components of defined structure
48Sulfur compounds
50Sulfur oxides
501by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
505in a spray drying process
B01D 53/508
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
34Chemical or biological purification of waste gases
46Removing components of defined structure
48Sulfur compounds
50Sulfur oxides
508by treating the gases with solids
B01D 53/80
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
34Chemical or biological purification of waste gases
74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
80Semi-solid phase processes, i.e. by using slurries
Applicants
  • BABCOCK & WILCOX POWER GENERATION GROUP, INC. [US]/[US]
Inventors
  • JANKURA, Bryan, J
  • SILVA, Anthony, A
  • CAMPOBENEDETTO, Edward, J
Agents
  • MARICH, Eric
Priority Data
13/548,15012.07.2012US
61/540,80629.09.2011US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) DRY SORBENT INJECTION DURING NON-STEADY STATE CONDITONS IN DRY SCRUBBER
(FR) INJECTION D'UNE MATIÈRE ABSORBANTE SÈCHE DANS UN ÉPURATEUR À SEC EN RÉGIME TRANSITOIRE
Abstract
(EN) Methods of reducing emissions levels during upset periods such as startup are disclosed for use with a dry scrubber desulfurization system. A dry calcium hydroxide powder is injected into the gas flowpath and hydrated in the spray dryer absorber. The resulting hydrated powder is then deposited on the filter bags in the baghouse. This can be done at lower temperatures than the spray dryer absorber would otherwise be operable, enabling desulfurization to occur earlier in the combustion process, such as during startup of a cold combustion system at ambient temperature. The operation of the combustion system can also be backed up, made up, trimmed, or augmented depending on various operating scenarios.
(FR) Cette invention concerne des procédés pour réduire les niveaux d'émissions pendant les périodes instables telles que le démarrage, destinés à être utilisés dans un système de désulfuration par épurateur à sec. Une poudre d'hydroxyde de calcium sèche est injectée dans le circuit des gaz et hydratée dans le séchoir par atomisation/absorbeur. La poudre hydratée obtenue est ensuite déposée sur les sacs filtrants du dépoussiéreur. Ceci peut être effectué à des températures plus basses que celles auxquelles opère normalement le séchoir par atomisation/absorbeur, permettant à la désulfuration de se produire plus tôt dans le processus de combustion, par exemple, lors du démarrage d'un système de combustion à froid à température ambiante. Le fonctionnement du système de combustion peut également être soutenu, composé, corrigé, ou augmenté en fonction des diverses conditions de fonctionnement.
Related patent documents
UAa201403631This application is not viewable in PATENTSCOPE because the national phase entry has not been published yet or the national entry is issued from a country that does not share data with WIPO or there is a formatting issue or an unavailability of the application.
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