Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
  • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
  • B07C5/16—Sorting according to weight
  • B07C5/22—Sorting according to weight using a plurality of stationary weighing mechanisms
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D53/00—Separation 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
  • B01D53/02—Separation 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 by adsorption, e.g. preparative gas chromatography
  • B01D53/06—Separation 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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
  • B01D53/08—Separation 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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds according to the "moving bed" method
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D53/00—Separation 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
  • B01D53/34—Chemical or biological purification of waste gases
  • B01D53/46—Removing components of defined structure
  • B01D53/48—Sulfur compounds
  • B01D53/50—Sulfur oxides
  • B01D53/508—Sulfur oxides by treating the gases with solids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
  • B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
  • B01J8/12—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles moved by gravity in a downward flow
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
  • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
  • B07C5/16—Sorting according to weight
  • B07C5/32—Sorting according to weight with associated check-weighing means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
  • B01D2253/10—Inorganic adsorbents
  • B01D2253/102—Carbon
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2257/00—Components to be removed
  • B01D2257/30—Sulfur compounds
  • B01D2257/302—Sulfur oxides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2257/00—Components to be removed
  • B01D2257/40—Nitrogen compounds
  • B01D2257/404—Nitrogen oxides other than dinitrogen oxide

Definitions

• the invention relates to a cross-flow moving bed reactor with a rectangular cross-section for granular adsorbent, in particular for flue gas desulfurization and / or denitrification, in which on the inflow and / or outflow side of the gas in the reactor shaft guide blinds and pre-blinds for guiding the adsorbent are provided.
• Such moving bed reactors are known for example from DE-AS 19 46 457.
• the blinds and the associated pre-blinds or perforated aprons improve the bulk material mechanics (mass flow) on the inflow and / or outflow side of the gas in the reactor shaft.
• mass flow mass flow
• the caking takes place because there are dust particles in the flue gases that accumulate in the intermediate grain volume of the adsorbent fill, glue them to the bottom and also cause caking on the side walls and on the blinds.
• Increased caking occurs when additional aerosols are added, for example ammonium salts, which are formed during the NO reduction in the presence of sulfur dioxide, the hygroscopic properties of which increase caking and overgrowth.
• the invention has for its object to avoid such caking.
• Figure 1 is the upstream view of a cross-flow moving bed reactor according to the prior art with lateral caking
• FIG. 2 shows detail A of a moving bed reactor according to FIG. 1 with transverse blinds according to the invention arranged parallel to the side walls;
• Figure 3 shows the object of Figure 2 in a partial section
• FIG. 4 shows the subject of FIG. 2 in a partially cut top view
• FIG. 8 a discharge funnel for the adsorbent with several discharge ducts.
• FIG. 1 which represents the state of the art, shows the lower region of a reactor shaft 11 which has guide blinds 2 on the inflow side, which are arranged between the side walls 1 and 1 a.
• the leading blinds 2 are associated with pre-blinds 3 (FIG. 3) which are not visible in FIG. 1.
• the outflow side of the reactor shaft 11, which is also equipped with guide blinds 2 and pre-blinds 3, is likewise not visible.
• the reactor shaft 11 is filled with a filling, not shown here, of adsorbent grains which pass through the reactor shaft 11 as a moving layer under the influence of gravity from top to bottom.
• the exhaust gas for example flue gas
• caking builds up in front of the side walls 1, which in the example extends to the dashed lines 12, 13. This caking occurs because the adsorbent flow in the wall area is disturbed. They consist of the dust that is separated from the flue gas and / or from other aerosols, e.g. B.
• FIGS. 2 to 4 show the embodiment of a reactor shaft according to the invention in which the aforementioned disadvantages are eliminated.
• transverse blinds 4, 5, 6, 41, 51, 61 are arranged obliquely in the direction of flow of the adsorbent toward the reactor walls 1, 1 a and fastened to the guide blinds 2 or pre-blinds 3 (FIG. 3) .
• the transverse blinds 4, 5, 6, 41, 51, 61 have the effect that the adsorbent grains of the traveling layer remain in motion in the region of the reactor walls 1, 1 a as it flows through the reactor shaft 11, so that caking is effectively prevented in this way .
• FIGS. 1 According to another embodiment of the invention, as shown in FIGS.
• the transverse blinds 8, 9, 10, 81, 91, 101 can also be attached only in the area of the guide blinds 2 and pre-blinds 3, since the caking occurs build mostly from the corner areas of the shaft 11, which are formed by the side walls 1, la and the Leitlalienien 2 or Vorjalou ⁇ sien 3.
• the cross blinds 4, 5, 6, 41, 51, 61; 8, 9, 10; 81, 91, 101 can be made from profiles which consist of gas-permeable or closed sheets.
• the uniform adsorbent flow also ensures that dusts and ammonium salts also flow off and are discharged.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Analytical Chemistry (AREA)
• Environmental & Geological Engineering (AREA)
• Health & Medical Sciences (AREA)
• Biomedical Technology (AREA)
• Organic Chemistry (AREA)
• Treating Waste Gases (AREA)
• Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
• Separation Of Gases By Adsorption (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=6365430

Family Applications (1)

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• 1988
  • 1988-10-19 DE DE19883835550 patent/DE3835550C1/de not_active Expired - Fee Related
• 1989
  • 1989-10-17 WO PCT/EP1989/001232 patent/WO1990004447A1/de not_active Ceased
  • 1989-10-17 EP EP19890911808 patent/EP0439500A1/de not_active Withdrawn
  • 1989-10-17 JP JP1510994A patent/JPH04501083A/ja active Pending

Non-Patent Citations (1)

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