CN202881339U - Smoke discharging system of horizontal type annealing furnace - Google Patents
Smoke discharging system of horizontal type annealing furnace Download PDFInfo
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- CN202881339U CN202881339U CN 201220444015 CN201220444015U CN202881339U CN 202881339 U CN202881339 U CN 202881339U CN 201220444015 CN201220444015 CN 201220444015 CN 201220444015 U CN201220444015 U CN 201220444015U CN 202881339 U CN202881339 U CN 202881339U
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- interchanger
- dilution air
- smoke
- flue gas
- pipe line
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Abstract
The utility model provides a smoke discharging system of a horizontal type annealing furnace. The smoke discharging system comprises a smoke discharging pipeline, a heat exchanger and a smoke discharging fan, wherein an air inlet end C of the heat exchanger is connected with a combustion-supporting air fan; an air outlet end D of the heat exchanger is connected with a heating section of the annealing furnace through a combustion-supporting air conveying pipeline; a baffle for controlling furnace pressure is arranged on the smoke discharging pipeline between the heat exchanger and a preheating section of the annealing furnace and is connected with the smoke discharging fan through a furnace pressure transmission controller; a first air dilution valve is arranged on the smoke discharging pipeline between the baffle and a smoke inlet end A of the heat exchanger; and a combustion-supporting air discharging valve is arranged on the combustion-supporting air conveying pipeline behind the air outlet end D of the heat exchanger and is connected with a chimney. The smoke discharging system has the advantages of accurately measuring smoke temperature; and when a production line is abnormal, and the smoke temperature is relatively high, the heat exchanger can be well protected, and the furnace pressure can be precisely controlled.
Description
Technical field
The utility model relates to hot rolled strip annealing and pickling production line, is specifically related to a kind of Horizental annealer fume exhaust system.
Background technology
In hot rolled strip annealing and pickling production line, annealing furnace is the important component part of this production-line technique section, and in the fume exhaust system of annealing furnace, interchanger is installed in the smoke discharging pipe, from the flue gas after the burning, reclaim heat, simultaneously required combustion air during preheated burning.In process of production, when production line abnormal situation, process section cut operation or when running slowly, the flue-gas temperature of annealing furnace smoke discharging system can fast rise, if flue-gas temperature is too high in the fume exhaust system, interchanger is easily damaged, simultaneously, fume exhaust system is also being controlled the furnace pressure of whole annealing furnace, when furnace pressure can not accurately be controlled, combustion gases composition in the stove is also restive, can cause like this problems such as oxidated layer thickness increase of belt steel surface.
Summary of the invention
Technical problem to be solved in the utility model is that annealing furnace smoke discharging system above shortcomings provide a kind of casualty ratio of accidents low, can prevent the Horizental annealer fume exhaust system that interchanger is damaged in the existing hot rolled strip annealing and pickling production line.
The utility model is to solve the problems of the technologies described above the technical scheme that adopts to be:
A kind of Horizental annealer fume exhaust system, comprise flue gas exhausting pipe line, interchanger and smoke exhaust fan, flue gas exhausting pipe line is connected with the preheating section of annealing furnace, interchanger and smoke exhaust fan are located on the flue gas exhausting pipe line successively, the flue gas exhausting pipe line of smoke exhaust fan exit end leads to chimney, heat exchanger comprises smoke inlet end A and the smoke outlet B that communicates with flue gas exhausting pipe line, and the gas inlet end C that communicates with the combustion air transport pipe and airout end D, the gas inlet end C of heat exchanger is connected with the combustion air blower fan, airout end D links to each other with the heating zone of annealing furnace by the combustion air transport pipe, baffle plate for the control furnace pressure is installed on the flue gas exhausting pipe line between interchanger and the annealing furnace preheating section, this baffle plate links to each other with smoke exhaust fan by the furnace pressure transfer control, heating zone and the preheating section of described annealing furnace are equipped with pressometer, and described furnace pressure transfer control is connected with each pressometer; On the flue gas exhausting pipe line between baffle plate and the interchanger smoke inlet end A the first Dilution air valve is installed; Combustion air transport pipe behind the interchanger airout end D is provided with the combustion air vent valves, and combustion air vent valves and chimney join.
In such scheme, the second Dilution air valve is installed on the flue gas exhausting pipe line between described interchanger smoke outlet B and the smoke exhaust fan.
In such scheme, the first thermopair for the flue-gas temperature before the smoke inlet end A that measures interchanger is installed on the flue gas exhausting pipe line between described interchanger and the first Dilution air valve, the first thermopair is connected with the first Dilution air valve by the first temperature transfer control, correspondence is connected with the first Dilution air pipeline on the first Dilution air valve, and correspondence is equipped with the first Dilution air blower fan on the first Dilution air pipeline.
In such scheme, the second thermopair for the flue-gas temperature after the smoke outlet B that measures interchanger is installed on the flue gas exhausting pipe line between described interchanger and the second Dilution air valve, and the second thermopair is connected with the combustion air vent valves by the second temperature transfer control.
In such scheme, the three thermocouple that enters smoke exhaust fan flue-gas temperature before for measurement is installed between described the second Dilution air valve and the smoke exhaust fan, three thermocouple is connected with the second Dilution air valve before the smoke exhaust fan by the 3rd temperature transfer control, correspondence is connected with the second Dilution air pipeline on the second Dilution air valve, and correspondence is equipped with the second Dilution air blower fan on the second Dilution air pipeline.
The utility model principle of work is:
(1) baffle plate and smoke exhaust fan are used for the control furnace pressure, measure the pressure of heating zone burner hearth and preheating section burner hearth by pressometer, get the mean value of all observed values, signal is connected by the front baffle plate of furnace pressure transfer control and interchanger, when furnace pressure during greater than set(ting)value, at first the automatic regulating fender aperture of system's meeting can't satisfy setting pressure after baffle opening is transferred to maximum, heightens rotational speed of smoke extractor again.Otherwise flue gas exhausting pipe line pressure reduces first rotational speed of smoke extractor during less than set(ting)value, when smoke exhaust fan is transferred to minimum speed, can't satisfy setting pressure, reduces baffle opening again.
(2) first Dilution air valves are for the protection of interchanger, when the first thermopair detects after the heat exchanger entrance flue-gas temperature reaches certain value, the first Dilution air valve is regulated aperture automatically according to the variation of flue-gas temperature, thereby regulates the air quantity that enters flue by the first Dilution air pipeline; When flue-gas temperature too high, when the first Dilution air valve regulated still can not satisfy the permission entrance flue gas temperature of interchanger to maximum opening, the first Dilution air blower fan starts automatically, adding Wind Volume dilutes high-temperature flue gas, reduce flue-gas temperature, prevent that interchanger from damaging owing to flue-gas temperature is too high.
(3) the combustion air vent valves is for the protection of interchanger; when production line stops or slowing down; interchanger can not bear too high temperature; for preventing such situation; need to regulate the aperture of combustion air vent valves; the combustion air of suitable proportion directly is disposed to chimney, can increases like this air capacity by interchanger in time to take away the heat of interchanger, reach the purpose of protection interchanger.
(4) second Dilution air valve installations are before smoke exhaust fan, after entrance flue gas temperature that the three thermocouple before the smoke exhaust fan detects smoke exhaust fan is higher than certain value, the second Dilution air valve can be regulated aperture automatically according to temperature signal, thereby the air capacity of regulating in the factory building that absorbs by the second Dilution air pipeline reduces flue-gas temperature; When flue-gas temperature was too high, the second Dilution air blower fan started automatically, adds Wind Volume high-temperature flue gas is diluted, and further reduces flue-gas temperature, thereby prevented the impeller excess Temperature of smoke exhaust fan and the damage that arrives.
(5) first thermopairs are used for accurately measurement and enter interchanger smoke inlet end A flue-gas temperature before; the second thermopair is used for accurately measuring interchanger smoke outlet B flue-gas temperature afterwards; three thermocouple is used for measurement and enters smoke exhaust fan flue-gas temperature before; measure more exactly flue-gas temperature by three thermopairs and corresponding temperature transfer control thereof, protect better interchanger.
The beneficial effect of the utility model device is: can measure more exactly flue-gas temperature, when production line abnormal situation, when flue-gas temperature is higher, can protect well interchanger, accurately control simultaneously furnace pressure.
Description of drawings
Fig. 1 is the structural representation of the utility model Horizental annealer fume exhaust system.
Among the figure, the 1-annealing furnace; The 2-pressometer; 3-furnace pressure transfer control; The 4-baffle plate; 5.1-the first Dilution air pipeline; 5.2-the second Dilution air pipeline; 6.1-the first Dilution air blower fan; 6.2-the second Dilution air blower fan; 7.1-the first Dilution air valve; 7.2-the second Dilution air valve; 8-combustion air transport pipe; 9.1-the first temperature transfer control; 9.2-the second temperature transfer control; 9.3-the 3rd temperature transfer control; 10.1-the first thermopair; 10.2-the second thermopair; 10.3-three thermocouple; 11-combustion air blower fan; The 12-interchanger; The 13-smoke exhaust fan; The 14-flue gas exhausting pipe line; 15-combustion air vent valves.
Embodiment
Below in conjunction with drawings and Examples the technical solution of the utility model is described further.
With reference to shown in Figure 1, a kind of Horizental annealer fume exhaust system described in the utility model, comprise flue gas exhausting pipe line 14, interchanger 12 and smoke exhaust fan 13, flue gas exhausting pipe line 14 is connected with the preheating section of annealing furnace 1, interchanger 12 and smoke exhaust fan 13 are located on the flue gas exhausting pipe line 14 successively, the flue gas exhausting pipe line 14 of smoke exhaust fan 13 exit end leads to chimney, heat exchanger 12 comprises smoke inlet end A and the smoke outlet B that communicates with flue gas exhausting pipe line 14, and the gas inlet end C that communicates with combustion air transport pipe 8 and airout end D, the gas inlet end C of heat exchanger 12 is connected with combustion air blower fan 11, airout end D links to each other with the heating zone of annealing furnace 1 by combustion air transport pipe 8, baffle plate 4 for the control furnace pressure is installed on the flue gas exhausting pipe line 14 between interchanger 12 and annealing furnace 1 preheating section, this baffle plate 4 links to each other with smoke exhaust fan 13 by furnace pressure transfer control 3, the heating zone of described annealing furnace 1 and preheating section are equipped with pressometer 2, and described furnace pressure transfer control 3 is connected with each pressometer; On the flue gas exhausting pipe line 14 between baffle plate 4 and the interchanger 12 smoke inlet end A the first Dilution air valve 7.1 is installed; Combustion air transport pipe 8 behind the interchanger 12 airout end D is provided with combustion air vent valves 15, and combustion air vent valves 15 is joined with chimney.
On the flue gas exhausting pipe line 14 between described interchanger 12 smoke outlet B and the smoke exhaust fan 13 the second Dilution air valve 7.2 is installed.
The first thermopair 10.1 that enters interchanger 12 smoke inlet end A flue-gas temperature before for measurement is installed on the flue gas exhausting pipe line 14 between described interchanger 12 and the first Dilution air valve 7.1, the first thermopair 10.1 is connected with the first Dilution air valve 7.1 by the first temperature transfer control 9.1, correspondence is connected with that correspondence is equipped with the first Dilution air blower fan 6.1 on the first Dilution air pipeline 5.1, the first Dilution air pipelines 5.1 on the first Dilution air valve 7.1.
The second thermopair 10.2, the second thermopairs 10.2 that are equipped with on the flue gas exhausting pipe line 14 between described interchanger 12 and the second Dilution air valve 7.2 for the flue-gas temperature after the smoke outlet B that measures interchanger 12 are connected with combustion air vent valves 15 by the second temperature transfer control 9.2.
The three thermocouple 10.3 that enters smoke exhaust fan 13 flue-gas temperature before for measurement is installed between described the second Dilution air valve 7.2 and the smoke exhaust fan 13, the second Dilution air valve 7.2 of three thermocouple 10.3 before by the 3rd temperature transfer control 9.3 and smoke exhaust fan 13 is connected, correspondence is connected with that correspondence is equipped with the second Dilution air blower fan 6.2 on the second Dilution air pipeline 5.2, the second Dilution air pipelines 5.2 on the second Dilution air valve 7.2.
During work, baffle plate 4 and smoke exhaust fan 13 are used for the control furnace pressure, measure the pressure of heating zone burner hearth and preheating section burner hearth by pressometer 2, get the mean value of all observed values, the baffle plate 4 of signal before by furnace pressure transfer control 3 and interchanger 12 is connected, and when furnace pressure during greater than set(ting)value, at first automatic regulating fender 4 apertures are understood by system, after baffle plate 4 apertures are transferred to maximum, can't satisfy setting pressure, heighten again smoke exhaust fan 13 rotating speeds.Otherwise flue gas exhausting pipe line pressure reduces first smoke exhaust fan 13 rotating speeds during less than set(ting)value, when smoke exhaust fan 13 is transferred to minimum speed, can't satisfy setting pressure, reduces baffle plate 4 apertures again.
The first Dilution air valve 7.1 is for the protection of interchanger 12, when the first thermopair 10.1 detects after interchanger 12 entrance flue gas temperatures reach certain value, the first Dilution air valve 7.1 is regulated aperture automatically according to the variation of flue-gas temperature, thereby regulates the air quantity that enters flue 14 by the first Dilution air pipeline 5.1; When flue-gas temperature too high, the first Dilution air valve 7.1 is adjusted to maximum opening still can not satisfy the permission entrance flue gas temperature of interchanger 12 time, the first Dilution air blower fan 6.1 starts automatically, adding Wind Volume dilutes high-temperature flue gas, reduce flue-gas temperature, prevent that interchanger 12 from damaging owing to flue-gas temperature is too high.
Combustion air vent valves 15 is for the protection of interchanger 12; when production line stops or slowing down; interchanger 12 can not bear too high temperature; for preventing such situation; need to regulate the aperture of combustion air vent valves 15; the combustion air of suitable proportion directly is disposed to chimney, can increases like this air capacity by interchanger 12 in time to take away the heat of interchanger 12, reach the purpose of protection interchanger 12.
Before the second Dilution air valve 7.2 is installed in smoke exhaust fan 13, after entrance flue gas temperature that the three thermocouple 10.3 before the smoke exhaust fan 13 detects smoke exhaust fan 13 is higher than certain value, the second Dilution air valve 7.2 can be regulated aperture automatically according to temperature signal, thereby the air capacity of regulating in the factory building that absorbs by the second Dilution air pipeline 5.2 reduces flue-gas temperature; When flue-gas temperature was too high, the second Dilution air blower fan 6.2 started automatically, adds Wind Volume high-temperature flue gas is diluted, and further reduces flue-gas temperature, thereby prevented the impeller excess Temperature of smoke exhaust fan 13 and the damage that arrives.
The first thermopair 10.1 is used for accurately measurement and enters interchanger smoke inlet end A flue-gas temperature before; the second thermopair 10.2 is used for accurately measuring interchanger smoke outlet B flue-gas temperature afterwards; three thermocouple 10.3 is used for measurement and enters smoke exhaust fan 13 flue-gas temperature before; measure more exactly flue-gas temperature by three thermopairs 10.1 ~ 10.3 and corresponding temperature transfer control 9.1 ~ 9.3 thereof, protect better interchanger.
Above disclosed only is preferred embodiment of the present utility model; the utility model also can be applicable to vertical annealing furnace and other continuous annealing furnaces; therefore can not limit with this interest field of the utility model; the equivalence of doing according to the utility model claim changes, and still falls into protection domain of the present utility model.
Claims (5)
1. Horizental annealer fume exhaust system, comprise flue gas exhausting pipe line (14), interchanger (12) and smoke exhaust fan (13), flue gas exhausting pipe line (14) is connected with the preheating section of annealing furnace (1), interchanger (12) and smoke exhaust fan (13) are located on the flue gas exhausting pipe line (14) successively, the flue gas exhausting pipe line (14) of smoke exhaust fan (13) exit end leads to chimney, heat exchanger (12) comprises smoke inlet end A and the smoke outlet B that communicates with flue gas exhausting pipe line (14), and the gas inlet end C that communicates with combustion air transport pipe (8) and airout end D, the gas inlet end C of heat exchanger (12) is connected with combustion air blower fan (11), airout end D links to each other with the heating zone of annealing furnace (1) by combustion air transport pipe (8), it is characterized in that: the baffle plate (4) for the control furnace pressure is installed on the flue gas exhausting pipe line (14) between interchanger (12) and annealing furnace (1) preheating section, this baffle plate (4) links to each other with smoke exhaust fan (13) by furnace pressure transfer control (3), the heating zone of described annealing furnace (1) and preheating section are equipped with pressometer (2), and described furnace pressure transfer control (3) is connected with each pressometer; On the flue gas exhausting pipe line (14) between baffle plate (4) and interchanger (12) the smoke inlet end A the first Dilution air valve (7.1) is installed; Combustion air transport pipe (8) behind interchanger (12) the airout end D is provided with combustion air vent valves (15), and combustion air vent valves (15) is joined with chimney.
2. Horizental annealer fume exhaust system as claimed in claim 1 is characterized in that: the second Dilution air valve (7.2) is installed on the flue gas exhausting pipe line (14) between described interchanger (12) smoke outlet B and the smoke exhaust fan (13).
3. Horizental annealer fume exhaust system as claimed in claim 1, it is characterized in that: the first thermopair (10.1) for the flue-gas temperature before the smoke inlet end A that measures interchanger (12) is installed on the flue gas exhausting pipe line (14) between described interchanger (12) and the first Dilution air valve (7.1), the first thermopair (10.1) is connected with the first Dilution air valve (7.1) by the first temperature transfer control (9.1), the upper correspondence of the first Dilution air valve (7.1) is connected with the first Dilution air pipeline (5.1), and the upper correspondence of the first Dilution air pipeline (5.1) is equipped with the first Dilution air blower fan (6.1).
4. Horizental annealer fume exhaust system as claimed in claim 2, it is characterized in that: the second thermopair (10.2) for the flue-gas temperature after the smoke outlet B that measures interchanger (12) is installed on the flue gas exhausting pipe line (14) between described interchanger (12) and the second Dilution air valve (7.2), and the second thermopair (10.2) is connected with combustion air vent valves (15) by the second temperature transfer control (9.2).
5. Horizental annealer fume exhaust system as claimed in claim 2, it is characterized in that: between described the second Dilution air valve (7.2) and the smoke exhaust fan (13) three thermocouple (10.3) that enters smoke exhaust fan (13) flue-gas temperature before for measurement is installed, three thermocouple (10.3) is connected by the second front Dilution air valve (7.2) of the 3rd temperature transfer control (9.3) and smoke exhaust fan (13), the upper correspondence of the second Dilution air valve (7.2) is connected with the second Dilution air pipeline (5.2), and the upper correspondence of the second Dilution air pipeline (5.2) is equipped with the second Dilution air blower fan (6.2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220444015 CN202881339U (en) | 2012-09-03 | 2012-09-03 | Smoke discharging system of horizontal type annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220444015 CN202881339U (en) | 2012-09-03 | 2012-09-03 | Smoke discharging system of horizontal type annealing furnace |
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| Publication Number | Publication Date |
|---|---|
| CN202881339U true CN202881339U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220444015 Expired - Fee Related CN202881339U (en) | 2012-09-03 | 2012-09-03 | Smoke discharging system of horizontal type annealing furnace |
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| CN (1) | CN202881339U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816902A (en) * | 2012-09-03 | 2012-12-12 | 中冶南方(武汉)威仕工业炉有限公司 | Smoke evacuation system of horizontal type annealing furnace |
| CN108788043A (en) * | 2018-07-11 | 2018-11-13 | 尚成荣 | A kind of copper rod up-leading conticaster multi-channel energy-saving exhausting system |
-
2012
- 2012-09-03 CN CN 201220444015 patent/CN202881339U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816902A (en) * | 2012-09-03 | 2012-12-12 | 中冶南方(武汉)威仕工业炉有限公司 | Smoke evacuation system of horizontal type annealing furnace |
| CN108788043A (en) * | 2018-07-11 | 2018-11-13 | 尚成荣 | A kind of copper rod up-leading conticaster multi-channel energy-saving exhausting system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20140903 |
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| EXPY | Termination of patent right or utility model |