JPS5594121A - Overheating detector for rotary regenerative heat exchanger - Google Patents
Overheating detector for rotary regenerative heat exchangerInfo
- Publication number
- JPS5594121A JPS5594121A JP126379A JP126379A JPS5594121A JP S5594121 A JPS5594121 A JP S5594121A JP 126379 A JP126379 A JP 126379A JP 126379 A JP126379 A JP 126379A JP S5594121 A JPS5594121 A JP S5594121A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- voltage
- detection
- thermocouple
- comparator
- 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.)
- Pending
Links
- 238000013021 overheating Methods 0.000 title abstract 2
- 230000001172 regenerating effect Effects 0.000 title 1
- 238000001514 detection method Methods 0.000 abstract 4
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/006—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for regenerative heat-exchange apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
PURPOSE:To accomplish an accurate detection of abnormal temperature rise regardless of operation temperature by continuously comparing the operation temperature with the reference temperature for a fixed period. CONSTITUTION:This overheating detector is composed of a temperature detecting cylinder 40 incorporating a thermocouple 4 provided close to the heat transferring device 1 in a hot gas outlet 21 of an air preheater and a warning device 41 comprising a reference temperature memorizing circuit 42 and a warning generating circuit 43. In operation, voltage generated by the thermocouple is applied to a comparator 45 as detection voltage through a milli-volt/volt converter 45 while done to the comparator 46 as the reference voltage through a sampling electronic switch 48 controlled with a timer 47 and a hold circuit 49 whereby the detection voltage is continually compared with the reference voltage. When the detection voltage exceeds the reference voltage, it is judged that a fire is occurring and a buzzer is actuated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP126379A JPS5594121A (en) | 1979-01-12 | 1979-01-12 | Overheating detector for rotary regenerative heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP126379A JPS5594121A (en) | 1979-01-12 | 1979-01-12 | Overheating detector for rotary regenerative heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5594121A true JPS5594121A (en) | 1980-07-17 |
Family
ID=11496557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP126379A Pending JPS5594121A (en) | 1979-01-12 | 1979-01-12 | Overheating detector for rotary regenerative heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5594121A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58213242A (en) * | 1982-06-07 | 1983-12-12 | Showa Denko Kk | Method for measuring physical property value of heated material |
| FR2689226A1 (en) * | 1992-03-30 | 1993-10-01 | Stein Industrie | Surveillance appts. sensing fires starting in rotary air heaters - uses optical radiation pyrometers monitoring radial zone above rotating drum to detect fires. |
| WO1995022039A1 (en) * | 1994-02-10 | 1995-08-17 | Abb Air Preheater, Inc. | Temperature monitoring method and system for regenerative heat exchanger |
| CN102243109A (en) * | 2011-06-28 | 2011-11-16 | 高明逊 | Metal wall temperature measurement system for rotary air preheater |
| CN112433551A (en) * | 2020-11-03 | 2021-03-02 | 北方魏家峁煤电有限责任公司 | Air preheater warning system, method and computer readable medium |
-
1979
- 1979-01-12 JP JP126379A patent/JPS5594121A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58213242A (en) * | 1982-06-07 | 1983-12-12 | Showa Denko Kk | Method for measuring physical property value of heated material |
| FR2689226A1 (en) * | 1992-03-30 | 1993-10-01 | Stein Industrie | Surveillance appts. sensing fires starting in rotary air heaters - uses optical radiation pyrometers monitoring radial zone above rotating drum to detect fires. |
| WO1995022039A1 (en) * | 1994-02-10 | 1995-08-17 | Abb Air Preheater, Inc. | Temperature monitoring method and system for regenerative heat exchanger |
| CN102243109A (en) * | 2011-06-28 | 2011-11-16 | 高明逊 | Metal wall temperature measurement system for rotary air preheater |
| CN112433551A (en) * | 2020-11-03 | 2021-03-02 | 北方魏家峁煤电有限责任公司 | Air preheater warning system, method and computer readable medium |
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