GB719378A - Improvements in heat exchangers - Google Patents
Improvements in heat exchangersInfo
- Publication number
- GB719378A GB719378A GB26104/50A GB2610450A GB719378A GB 719378 A GB719378 A GB 719378A GB 26104/50 A GB26104/50 A GB 26104/50A GB 2610450 A GB2610450 A GB 2610450A GB 719378 A GB719378 A GB 719378A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- bank
- tubes
- banks
- air
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
719,378. Heating air for combustion. BABCOCK & WILCOX, Ltd. Oct. 26, 1950 [Oct. 29,1949], No. 26104/50. Class 64(1) In a heat-exchanger in which a cool fluid (e.g. combustion air) is heated by furnace gases, heat-exchange elements are disposed in groups along the cool fluid flow path leading from a cool fluid inlet, and means are provided whereby the gas flow through the group of elements adjacent the cool fluid inlet may be increased to maintain the elements of that group at a sufficiently high temperature to inhibit the condensation thereon of vapour in the furnace gases. The air heater shown comprises two units A, B, Fig. 2, connected in parallel to a common gas inlet 8 and leading to an inlet chamber 23 for each unit and thence through the heat-exchanger elements to individual gas outlet chambers 27 each 'having an outlet duct 26. Each unit A, B comprises successive banks C, D, E, F, Fig. 1, of tubes 16, the tubes in bank C adjacent the inlet 12 for air to be heated being fewer in number and more widely spaced than are the tubes of bank F, while the tubes of bank D are more closely spaced than those of bank C but are fewer and more widely spaced than those of banks E and F. The banks C, F are connected in series by a passage 31 and the banks D, E are similarly connected in series by a passage 32, Fig. 1. Dampers 41, 42 are provided in passages 31, 32 respectively. Combustion air is forced by a fan 13 through the duct 12 or individual ducts corresponding with the sections A, B, over the banks C, D, E, F in succession to the outlet 15 leading to the burners of a furnace. Hot gas is directed through the banks E, F in parallel and thereafter some of the gas is directed by way of passage 32 to bank D, the remainder being directed by way of passage 31 to bank C, which is adjacent the air inlet. By directing relatively hot gas to the bank C, the gas is not cooled below the dew point and corrosion of the tube walls is prevented. The proportion of gas directed to the bank C is controlled according to the temperature of the tubes by means comprising a thermocouple 121 adjacent the tubes in bank C which regulates the opening of the dampers 42. The maintenance of a suitable minimum gas temperature in the tube bank C is aided by the disposition of the tubes therein as compared with the other banks. In bank C the relatively wide tube spacing reduces the speed of air flow and therefore of heat flow from the tubes, and also the reduced number of tubes in bank C as compared with the other banks reduces the gas flow area and therefore increases the relative speed of the gas and therefore the rate of heat absorption from the gas by the tubes C is also increased. The cooled gas is finally discharged through the ducts 26. Additional dampers 11 and 14 are provided for controlling gas and air flow respectively. Provision is made for washing the tubes.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US719378XA | 1949-10-29 | 1949-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB719378A true GB719378A (en) | 1954-12-01 |
Family
ID=22104542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26104/50A Expired GB719378A (en) | 1949-10-29 | 1950-10-26 | Improvements in heat exchangers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB719378A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101813322A (en) * | 2010-04-13 | 2010-08-25 | 山东北辰压力容器有限公司 | Air preheater for preventing corrosion of dew points |
-
1950
- 1950-10-26 GB GB26104/50A patent/GB719378A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101813322A (en) * | 2010-04-13 | 2010-08-25 | 山东北辰压力容器有限公司 | Air preheater for preventing corrosion of dew points |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2363870A (en) | Temperature control of heat transfer surfaces | |
RU2436011C1 (en) | Flue gas heat utilisation device and method of its operation | |
US2744733A (en) | Heat exchange apparatus | |
US2213121A (en) | Method of and means for superheat control | |
GB719378A (en) | Improvements in heat exchangers | |
US2147609A (en) | Direct fired oil heater | |
US2417606A (en) | Furnace for the production of carbon black | |
GB1221560A (en) | A tubular heat exchanger | |
US2578783A (en) | Combustion gas heater apparatus for multitemperature air supply for furnaces | |
GB530792A (en) | Improvements in or relating to air heaters | |
US2832571A (en) | Fluid heating apparatus | |
US1789401A (en) | Air heater | |
US2599594A (en) | Fluid heater unit | |
USRE21396E (en) | Direct fired oil heater | |
GB729793A (en) | Improvements in heat exchangers | |
GB719423A (en) | Improvements in fluid heat exchange apparatus | |
US2820614A (en) | Fluid heater unit | |
GB514345A (en) | Improvements relating to tubular heat exchange apparatus suitable for heating air | |
SU142749A1 (en) | Water heater | |
SU798421A1 (en) | Recuperator section | |
GB726244A (en) | Improvements in tubulous vapour generating and vapour heating units and the operation thereof | |
JPS5936197B2 (en) | Multi-passage anti-corrosion air heating device | |
US2257821A (en) | Fluid heating unit | |
GB818730A (en) | Improvements relating to heat-exchangers | |
US2639695A (en) | Vapor generator |