GB718011A - Improvements in or relating to furnaces and methods of operating the same - Google Patents
Improvements in or relating to furnaces and methods of operating the sameInfo
- Publication number
- GB718011A GB718011A GB2186/50A GB218650A GB718011A GB 718011 A GB718011 A GB 718011A GB 2186/50 A GB2186/50 A GB 2186/50A GB 218650 A GB218650 A GB 218650A GB 718011 A GB718011 A GB 718011A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pebbles
- bed
- pebble
- chamber
- furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/24—Nitric oxide (NO)
- C01B21/30—Preparation by oxidation of nitrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/24—Nitric oxide (NO)
- C01B21/30—Preparation by oxidation of nitrogen
- C01B21/32—Apparatus
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
In the manufacture of nitrogen oxides by passing a mixture of nitrogen and oxygen, e.g. air, through a regenerative pebble bed furnace wherein the gaseous mixture is passed through a first preheating pebble bed, a reaction zone heated to nitrogen fixing temperatures and a second pebble bed to chill and stabilize the nitric oxide formed and in which the direction of flow is periodically reversed, the pebbles are passed periodically or p continuously into and out of the beds during the operation of the furnace. In the preferred apparatus, Fig. 2, the regenerative furnace is a unitary roof structure extending over both beds and the reaction zone. The reaction zone 110 is formed between a roof 114 composed of refractory bricks supported on a tubular water-cooled structure 115 and a base 112 formed of refractory material such as rammed magnesium oxide. On either side of the reaction chamber are pebble-filled spaces 121 and 122. The walls of the pebble chambers are formed by superposed layers 123 of refractory bricks that slant towards the centre of the furnace at the angle of repose of the pebbles and rest on base plates 125 and 126; successive strata of refractory material 123 are separated by metallic baffle plates 152 which terminate flush <PICT:0718011/III/1> <PICT:0718011/III/2> with the inner surface of the chamber 121. The baffle plates may be made of differing material depending on the temperature to be encountered in the zone 121; thus the lower plates 153 may be of stainless steel, the middle ones of a metal alloy and the upper ones are made of an iron free material such as nickel. Pebbles are fed to the two chambers 121, 122 from pebble reservoirs 141, 142 to flow between the edge of the roof 114 and the uppermost refractory stratum of the chamber wall, the pebbles assuming their natural angle of repose as they enter the beds. Pebbles may be withdrawn from the bottom of the chambers by rocking arms 131 and 132. In operation air is supplied alternately through pipes 161 and 162; for example is passes up through the hot chamber 121 and through the reaction zone 110, heated by the injection of fuel from nozzles 160; the nitric oxide formed is stabilized by passing through the bed of pebbles 122 which is cold. When bed 122 becomes hot and 121 becomes cold the direction of the passage of air is reversed. An alternative means of withdrawing pebbles from the bed is shown in Fig. 5 where a sheet 215a is oscillated about a crank 217 whereby quantities of pebbles from bed 211 are brought to the left by the oscillating plate and during the movement to the right of the plate the pebbles withdrawn are forced over the left edge of plate 215a by further pebbles which have by then dropped from chamber 211.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US297398XA | 1949-01-28 | 1949-01-28 | |
US310149XA | 1949-01-31 | 1949-01-31 | |
US270549XA | 1949-05-27 | 1949-05-27 | |
US191249XA | 1949-12-19 | 1949-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB718011A true GB718011A (en) | 1954-11-10 |
Family
ID=27486815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2186/50A Expired GB718011A (en) | 1949-01-28 | 1950-01-27 | Improvements in or relating to furnaces and methods of operating the same |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH297398A (en) |
FR (1) | FR1010162A (en) |
GB (1) | GB718011A (en) |
NL (2) | NL89664C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3149915A (en) * | 1961-05-16 | 1964-09-22 | Alfred M Thomsen | Method of maintaining continuous peak load operation at power generating centers based on fuel |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2918299A (en) * | 1956-11-28 | 1959-12-22 | Arnold L Lambert | Trail cart |
-
0
- NL NL76392D patent/NL76392C/xx active
- NL NL89664D patent/NL89664C/xx active
-
1950
- 1950-01-13 FR FR1010162D patent/FR1010162A/en not_active Expired
- 1950-01-26 CH CH297398D patent/CH297398A/en unknown
- 1950-01-27 GB GB2186/50A patent/GB718011A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3149915A (en) * | 1961-05-16 | 1964-09-22 | Alfred M Thomsen | Method of maintaining continuous peak load operation at power generating centers based on fuel |
Also Published As
Publication number | Publication date |
---|---|
NL89664C (en) | |
CH297398A (en) | 1954-03-31 |
FR1010162A (en) | 1952-06-09 |
NL76392C (en) |
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