CN102721180B - Cooling control protecting device for hot air furnace - Google Patents
Cooling control protecting device for hot air furnace Download PDFInfo
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- CN102721180B CN102721180B CN201210213080.XA CN201210213080A CN102721180B CN 102721180 B CN102721180 B CN 102721180B CN 201210213080 A CN201210213080 A CN 201210213080A CN 102721180 B CN102721180 B CN 102721180B
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- temperature
- furnace body
- heat exchanger
- hot air
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a cooling control protecting device for a hot air furnace. The cooling control protecting device comprises a hot air furnace body, a heat exchanger, an air-blocking wall and a hearth negative pressure control instrument and the like. The heat exchanger is installed in the hot air furnace body, and a temperature sensor is installed on a side wall of the hot air furnace body. The air-blocking wall is built on a rear arch of a hearth, and an air supply pipe is installed on the side wall of the hot air furnace body corresponding to the air-blocking wall. The hearth negative pressure control instrument is installed in the hot air furnace hearth. The temperature sensor is connected with a temperature control instrument through a line, the temperature control instrument is connected with a frequency converter through a line, an air feeder is connected with the frequency converter through a line, and the hearth negative pressure control instrument is connected with the frequency converter through a line. The cooling control protecting device has the advantages of being simple in structure, safe and reliable. Temperature of flue gas at a high-temperature end of the heat exchanger of the hot air furnace can be monitored accurately. When the temperature of the flue gas at the high-temperature end of the heat exchanger reaches an upper limit, cold air can be conveyed in time to perform cooling, accidents caused by too high temperature of the flue gas at the high-temperature end of the heat exchanger can be effectively avoided, and the cooling control protecting device is suitable for being installed and used on various hot air furnaces.
Description
Technical field
The present invention relates to hot-blast stove watch-dog, refer more particularly to hot-blast stove cooling control protective unit.
Background technology
In order to ensure safety in production, the relevant criterion of country has been done ceiling restriction to heat exchanger for hot-blast stove temperature end flue-gas temperature.On request, hot-blast stove manufacturer mostly adopts at heat exchanger smoke inlet place installing temperature sensor at present, in the time that heat exchanger temperature end flue-gas temperature reaches ceiling restriction, air-introduced machine is out of service, burning weakens, and flue-gas temperature declines gradually, while dropping to design temperature, air-introduced machine restarts, and hot-blast stove resumes operation.The shortcoming of this set is to lower the temperature too slow.Especially in the time using high heating value coal, high-temperature burner hearth and because of environmental protection need to arrange more than 15 meters under chimney effect, also there will be of short duration intensification phenomenon, the danger that heat exchanger is burnt still exists, and mine hot blast heater also may cause well shooting accident.
Summary of the invention
Goal of the invention of the present invention; be to provide one can effectively overcome above-mentioned deficiency; can monitor timely and accurately heat exchanger for hot-blast stove temperature end flue-gas temperature; when heat exchanger temperature end flue-gas temperature reaches in limited time; can carry in time cold air to lower the temperature, can effectively prevent the hot-blast stove cooling control protective unit having an accident because heat exchanger temperature end flue-gas temperature is too high.
Technical scheme of the present invention is such, hot-blast stove cooling control protective unit, and it comprises hot-blast furnace body, heat exchanger, fire grate, ajutage, pressure fan, temperature sensor, air baffle wall, hearth vacuum control instrument and control cabinet for power distribution;
Described hot-blast furnace body internal upper part is equipped with described heat exchanger, between heat exchanger and hot-blast furnace body madial wall, is gas flue; Described temperature sensor is housed on the hot-blast furnace body sidewall described in described gas flue middle and upper part; Described fire grate is equipped with in the interior bottom of described hot-blast furnace body, burner hearth rear arch has been built on the top of fire grate by laying bricks or stones, described air baffle wall is longitudinally built on the top of burner hearth rear arch by laying bricks or stones, on described hot-blast furnace body sidewall corresponding with air baffle wall, described ajutage is housed, the other end of ajutage is connected with described pressure fan; Hearth of hot-blast stove is in-built described hearth vacuum control instrument; Described temperature sensor is connected with the temperature controller on described control cabinet for power distribution by circuit, and temperature controller is connected with the frequency converter on control cabinet for power distribution by circuit; Described pressure fan is connected by the above frequency converter of circuit and control cabinet for power distribution; Described hearth vacuum control instrument is connected by the above frequency converter of circuit and control cabinet for power distribution.
Feature of the present invention is simple in structure, reasonable in design, easy to operate, safe and reliable.Can monitor exactly heat exchanger for hot-blast stove temperature end flue-gas temperature, when heat exchanger temperature end flue-gas temperature reaches in limited time, can carry in time cold air to lower the temperature, can effectively prevent because of too high the having an accident of heat exchanger temperature end flue-gas temperature.Be applicable to installing and using of all kinds of hot-blast stoves.
Brief description of the drawings
Fig. 1 is hot-blast stove cooling control protective unit overall structure partial schematic sectional view;
Wherein: 1 hot-blast furnace body, 2 heat exchangers, 3 fire grates, 4 ajutages, 5 pressure fans, 6 temperature sensors, 7 air baffle walls, 8 burner hearth rear arches, 9 hearth of hot-blast stoves, 10 hearth vacuum control instrument, 11 gas flues, 12 control cabinet for power distribution.
Detailed description of the invention.
As shown in drawings, the upper left quarter in described hot-blast furnace body 1 is equipped with described heat exchanger 2, between the temperature end right side of heat exchanger 2 and hot-blast furnace body 1 Right Inboard, is gas flue 11; Described gas flue 11 middle and upper parts, are equipped with described temperature sensor 6 on described hot-blast furnace body 1 right side wall; Described fire grate 3 is equipped with in the interior bottom of described hot-blast furnace body 1, burner hearth rear arch 8 has been built on the top of fire grate 3 by laying bricks or stones, described air baffle wall 7 is longitudinally built on the top of burner hearth rear arch 8 by laying bricks or stones, on described hot-blast furnace body 1 right side wall corresponding with air baffle wall 7, described ajutage 4 is housed, the other end of ajutage 4 is connected with described pressure fan 5; Hearth of hot-blast stove is in-built described hearth vacuum control instrument 10; Described temperature sensor 6 is connected with the temperature controller on described control cabinet for power distribution 12 by circuit, and temperature controller is connected with the frequency converter on control cabinet for power distribution 12 by circuit; Described pressure fan 5 is connected by the above frequency converter of circuit and control cabinet for power distribution 12; Described hearth vacuum control instrument 10 is connected by the above frequency converter of circuit and control cabinet for power distribution 12.
In the time that heat exchanger entrance place flue-gas temperature reaches ceiling temperature, detection signal is transferred to temperature controller by temperature sensor 6, and temperature controller is passed to frequency converter by detection signal again, and frequency converter starts pressure fan, pressure fan starts to accelerate, and ever-increasing cold air is sent into burner hearth rear portion.For preventing cold air and the flue gas formation eddy current that liquidates, affect Combustion of Hot Air Furnace, in burner hearth rear arch top and ajutage corresponding section, build air baffle wall by laying bricks or stones.Under the effect of air baffle wall, cold air folding turn 90 degrees and rises and mix with flue gas.Along with the acceleration of pressure fan, cold air amount increases gradually, and flue-gas temperature constantly declines, and in burner hearth, negative pressure reduces gradually.Hearth vacuum control instrument detects when combustion chamber draft reaches setting value, and signal is passed to frequency converter, and Frequency Converter Control pressure fan stops accelerating, and keeps stable air-supply.In the time that temperature controller detects that heat exchanger enters cigarette place temperature and drops to safe temperature, signal is passed to frequency converter, Frequency Converter Control pressure fan is shut down.So go round and begin again, ensure that heat exchanger entrance place flue-gas temperature is all the time below ceiling temperature, and then reach the object of heat exchanger safe operation.
Claims (1)
1. hot-blast stove cooling control protective unit, it comprises hot-blast furnace body (1), heat exchanger (2), fire grate (3) and temperature sensor (6); It is characterized in that, it also comprises ajutage (4), pressure fan (5), air baffle wall (7), hearth vacuum control instrument (10) and control cabinet for power distribution (12);
Described hot-blast furnace body (1) internal upper part is equipped with described heat exchanger (2), between heat exchanger (2) and hot-blast furnace body (1) madial wall, is gas flue (11); Described temperature sensor (6) is housed on hot-blast furnace body (1) sidewall described in described gas flue (11) middle and upper part; Described fire grate (3) is equipped with in the interior bottom of described hot-blast furnace body (1), burner hearth rear arch (8) has been built on the top of fire grate (3) by laying bricks or stones, described air baffle wall (7) is longitudinally built on the top of burner hearth rear arch (8) by laying bricks or stones, on described hot-blast furnace body (1) sidewall corresponding with air baffle wall (7), described ajutage (4) is housed, the other end of ajutage (4) is connected with described pressure fan (5); Hearth of hot-blast stove is in-built described hearth vacuum control instrument (10); Described temperature sensor (6) is connected with the temperature controller on described control cabinet for power distribution (12) by circuit, and temperature controller is connected with the frequency converter on control cabinet for power distribution (12) by circuit; Described pressure fan (5) is connected by the above frequency converter of circuit and control cabinet for power distribution (12); Described hearth vacuum control instrument (10) is connected by the above frequency converter of circuit and control cabinet for power distribution (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210213080.XA CN102721180B (en) | 2012-06-27 | 2012-06-27 | Cooling control protecting device for hot air furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210213080.XA CN102721180B (en) | 2012-06-27 | 2012-06-27 | Cooling control protecting device for hot air furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102721180A CN102721180A (en) | 2012-10-10 |
| CN102721180B true CN102721180B (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210213080.XA Expired - Fee Related CN102721180B (en) | 2012-06-27 | 2012-06-27 | Cooling control protecting device for hot air furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102721180B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940749A (en) * | 2017-11-17 | 2018-04-20 | 芜湖新农夫机械有限公司 | A kind of automatic temperature control hot air furnace |
| CN108253802A (en) * | 2018-01-12 | 2018-07-06 | 郑州旭飞光电科技有限公司 | Kiln heat sink and kiln |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2249877Y (en) * | 1995-02-25 | 1997-03-19 | 北京市农业机械研究所 | Movable multifunctional hot-air furnace |
| CN2921618Y (en) * | 2006-07-24 | 2007-07-11 | 苏国胜 | Waste heat internal dust-removing hot-air furnace |
| CN201025387Y (en) * | 2007-03-11 | 2008-02-20 | 刘晓光 | Temperature reduction and fireproof device of thermal wind furnace for coal mine |
| CN201269636Y (en) * | 2008-07-08 | 2009-07-08 | 刘晓光 | Fireproof and explosion-proof cooling device for hot-blast stove used in coal mine |
| CN201733790U (en) * | 2010-06-24 | 2011-02-09 | 浙江绿峰机械有限公司 | Air-return and pressure-reduction type high temperature hot air furnace with dust and smoke removal pipe |
-
2012
- 2012-06-27 CN CN201210213080.XA patent/CN102721180B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2249877Y (en) * | 1995-02-25 | 1997-03-19 | 北京市农业机械研究所 | Movable multifunctional hot-air furnace |
| CN2921618Y (en) * | 2006-07-24 | 2007-07-11 | 苏国胜 | Waste heat internal dust-removing hot-air furnace |
| CN201025387Y (en) * | 2007-03-11 | 2008-02-20 | 刘晓光 | Temperature reduction and fireproof device of thermal wind furnace for coal mine |
| CN201269636Y (en) * | 2008-07-08 | 2009-07-08 | 刘晓光 | Fireproof and explosion-proof cooling device for hot-blast stove used in coal mine |
| CN201733790U (en) * | 2010-06-24 | 2011-02-09 | 浙江绿峰机械有限公司 | Air-return and pressure-reduction type high temperature hot air furnace with dust and smoke removal pipe |
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| Publication number | Publication date |
|---|---|
| CN102721180A (en) | 2012-10-10 |
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Granted publication date: 20140618 Termination date: 20170627 |
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| CF01 | Termination of patent right due to non-payment of annual fee |