CN209783323U - device for preventing burner from extinguishing at low-temperature section of industrial furnace - Google Patents

Abstract

The utility model discloses a device that industrial furnace low temperature section prevents nozzle flame-out installs at the terminal and the gentle cooling zone of continuous type industrial furnace heat preservation section, including furnace body, furnace, nozzle, stove pressure sensor, zirconia detection case, branch pipe way of discharging fume, branch pipe motorised valve of discharging fume, main pipe way of discharging fume, combustion-supporting wind branch pipe way, combustion-supporting wind trunk line, gas branch pipe way and gas trunk line. The device installs at the terminal gentle cooling section of heat preservation section, and mainly through detecting how much of this regional oxygen content, through the stove pressure sensor by the branch pipe electric valve control volume of discharging fume to control furnace pressure provides an aerobic environment for the nozzle burning, is unlikely to flame-out when making this low temperature district small fire fine setting state, the sudden temperature drop that causes. Thus stabilizing the thermal regulation of the whole furnace, improving the automatic control system of the industrial furnace and improving the automation level of the industrial furnace.

Description

Device for preventing burner from extinguishing at low-temperature section of industrial furnace

Technical Field

The utility model relates to an industrial furnace field, in particular to industrial furnace low temperature section prevents flame-out device of nozzle.

Background

The position between the tail end of the heat preservation section and the cooling section of the continuous industrial furnace is called as a slow cooling section. The temperature of the section is lower due to the heat treatment process, the furnace temperature is difficult to be ensured to be constant in the section, the temperature of the slow cooling section is easy to exceed the temperature due to high-temperature hot flue gas from the heat preservation section, the heat dissipation of products and the heat supply of a tail end burner, the tail end burner is turned down once the temperature is exceeded, and the tail end burner is extremely easy to extinguish due to small flame. The extinguishing of the burner at the tail end enables the temperature of the slow cooling section to be rapidly reduced, and the temperature of the heat preservation section can be affected, so that the burner of the whole furnace starts to be adjusted greatly. The thermal regulation in the furnace is unstable, and the normal heat treatment of the product is affected. The adjustment of the position needs to be stable, great time and labor are required, the technical requirements on debugging personnel are high, and automatic control is required to be realized by a plurality of manufacturers.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides an industrial furnace low temperature section prevents the flame-out device of nozzle prevents that continuous type industrial furnace low temperature section end nozzle from extinguishing, plays the effect of stabilizing interior thermal technology system to, improve the quality of product, alleviate operating personnel work load, improved the automation level of industrial furnace.

The utility model provides a low temperature section prevents device that nozzle is flamed out installs at the terminal gentle cooling zone of continuous type industrial furnace heat preservation section, including furnace body, furnace, branch pipeline of discharging fume, main pipeline of discharging fume, combustion-supporting wind branch pipeline, combustion-supporting wind main pipeline, gas branch pipeline and gas main pipeline, the furnace body outside is installed the zirconia detection case, the zirconia detection case is installed at the slow cooling zone, be equipped with the test probe on the zirconia detection case, the test probe is installed at the position that the furnace body slow cooling zone leans on in the front, in the middle of the furnace body top and stretch into furnace; the burner nozzles are arranged on the outer side of the furnace body and are arranged on the two sides of the furnace body; the furnace pressure sensor is arranged at the tail end of the heat preservation section at the outer side of the furnace body, and is provided with a probe which is arranged at the top between the two burners at the tail end of the heat preservation section and extends into the hearth; the smoke exhaust branch pipeline is arranged on one side of the top of the hearth and is communicated with the smoke exhaust main pipeline; the combustion-supporting air branch pipeline is arranged on the outer side of the furnace body, one end of the combustion-supporting air branch pipeline is connected with the burner, one end, far away from the burner, of the combustion-supporting air branch pipeline is communicated with the combustion-supporting air main pipeline, and the combustion-supporting air main pipeline is arranged above the furnace body; the gas branch pipeline is installed on the outer side of the furnace body, one end of the gas branch pipeline is connected with the burner, and one end, far away from the burner, of the gas branch pipeline is communicated with the gas main pipeline.

In the scheme, the number of the burners is multiple.

In the scheme, the burner is provided with an automatic adjusting device.

In the scheme, the combustion-supporting air branch pipeline is provided with the electric valve and the manual control valve, and the electric valve is arranged above the manual control valve.

In the above scheme, the smoke exhaust branch pipe is provided with the smoke exhaust branch pipe electric valve.

In the above scheme, the smoke exhaust branch pipes are multiple.

In the above scheme, a control cabinet is arranged outside the furnace body, a computer is arranged in the control cabinet, and control lines of the automatic regulating device of the zirconia detection box, the furnace pressure sensor and the burner are all connected with the computer in the control cabinet.

The utility model has the advantages and the beneficial effects that: the utility model provides an industrial furnace low temperature section prevents flame-out device of nozzle, it is how much through detecting this regional oxygen content, through stove pressure sensor by the branch pipe electric valve control volume of discharging fume to control furnace pressure provides an aerobic environment for the nozzle burning, is unlikely to flame-out when making this low temperature district small fire fine setting state, the abrupt temperature drop who causes. Thus stabilizing the thermal regulation of the whole furnace, improving the automatic control system of the industrial furnace and improving the automation level of the industrial furnace.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a working principle diagram of the present invention.

In the figure: 1. furnace body 2, furnace 3, nozzle 4, gas branch pipeline

5. Gas main pipeline 6, combustion-supporting air branch pipeline 7 and furnace pressure sensor

8. Zirconia detection case 9, manual control valve 10, motorised valve

11. Main combustion air duct 12, main smoke exhaust duct 13 and branch smoke exhaust duct

14. Electric valve of smoke exhaust branch pipe

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 and 2, the utility model relates to a device for preventing burner flameout in low temperature section of industrial furnace, which is installed at the end and slow cooling section of the continuous industrial furnace heat preservation section, comprising a furnace body 1, a furnace chamber 2, a smoke exhaust branch pipe 13, a smoke exhaust main pipe 12, a combustion-supporting air branch pipe 6, a combustion-supporting air main pipe 11, a gas branch pipe 4 and a gas main pipe 5, wherein a zirconia detection box 8 is installed at the outer side of the furnace body 1, the zirconia detection box 8 is installed at the slow cooling section, a detection probe is arranged on the zirconia detection box 8, the detection probe is installed at the front part of the slow cooling section of the furnace body 1, and extends into the furnace chamber 2 in the middle; the outer side of the furnace body 1 is provided with a burner 3, and the burner 3 is arranged at the two sides of the furnace body 1; the tail end of the heat preservation section at the outer side of the furnace body 1 is provided with a furnace pressure sensor 7, the furnace pressure sensor 7 is provided with a probe, and the probe of the furnace pressure sensor 7 is arranged at the top between the two burners 3 at the tail end of the heat preservation section and extends into the hearth 2; the smoke exhaust branch pipeline 13 is arranged on one side of the top of the hearth 2, and the smoke exhaust branch pipeline 13 is communicated with the smoke exhaust main pipeline 12; the combustion-supporting air branch pipeline 6 is arranged on the outer side of the furnace body 1, one end of the combustion-supporting air branch pipeline 6 is connected with the burner 3, one end of the combustion-supporting air branch pipeline 6, which is far away from the burner 3, is communicated with the combustion-supporting air main pipeline 11, and the combustion-supporting air main pipeline 11 is arranged above the furnace body 1; the gas branch pipeline 4 is installed in the furnace body 1 outside, and the one end and the nozzle 3 of gas branch pipeline 4 are connected, and the one end and the gas trunk line 5 intercommunication of nozzle are kept away from to gas branch pipeline 4.

Specifically, a plurality of burners 3 are arranged on two sides of the furnace body 1, and automatic adjusting devices are arranged on the burners 3 and can adjust the proportion of air and fuel gas and transmit signals of the proportion of air and fuel gas.

Furthermore, an electric valve 10 and a manual control valve 9 are arranged on the combustion-supporting air branch pipe 6, and the electric valve 10 is arranged above the manual control valve 9.

Furthermore, a plurality of exhaust branch pipes 13 are arranged on the exhaust branch pipe 13 and are communicated with the main exhaust pipe 12.

Wherein, the control lines of the zirconia detection box 8, the furnace pressure sensor 7 and the automatic regulating device of the burner 3 are all connected with a computer in the control cabinet and are controlled by the computer comprehensive data in a centralized way.

The working principle of the scheme is that an aerobic combustion environment is provided for the burner 3 by adjusting the pressure of the hearth 2 through detecting the oxygen content at the position so as to help the low-temperature section burner to keep burning with small fire. The zirconia detection box 8 detects that the oxygen content is lower than a certain value (the comparison result is observed for a long time), then the oxygen content is compared with the temperature of the burner 3 at the tail end of the heat preservation section, the value of the furnace pressure sensor 7 at the position is also compared, if the temperature is equal to or slightly higher than the set temperature and the negative value of the furnace pressure is larger, the computer requires the electric valve 14 of the branch pipe of the smoke exhaust pipe to be slightly closed, namely the suction force in the furnace is reduced, the negative value of the furnace pressure is reduced, and the oxygen content at the position is increased or kept unchanged; if the temperature is lower than the set temperature, the furnace pressure is normal, and the adjustment is not needed at the moment.

Wherein, the burnt smoke enters the main smoke exhaust pipeline 12 after entering the branch smoke exhaust pipeline 13, the main smoke exhaust pipeline 12 exhausts the smoke through the smoke exhaust fan, and the flow of the branch smoke exhaust pipeline 13 is controlled by the branch smoke exhaust pipeline electric valve 14; when the oxygen content needs to be increased at the burner 3, combustion-supporting air generated by a combustion-supporting fan enters a main combustion-supporting air pipeline 11 and then flows into each branch combustion-supporting air pipeline 6 respectively and is transmitted to the burner 3, and the gas flow of the branch combustion-supporting air pipelines 6 is controlled by an electric valve 10 and a manual control valve 9 of the branch combustion-supporting air pipelines 6; the gas flows into each gas branch pipeline 4 through the gas main pipeline 5 and then is transmitted to the burner 3, and the gas, the oxygen and the proportion at the burner 3 are controlled and adjusted by a proportional valve.

The utility model has the advantages and beneficial effect:

The utility model provides a device for preventing burner flameout in low temperature section of industrial furnace, which is used for stabilizing the thermotechnical system in the industrial furnace, is the comprehensive adjusting result of the measurement and comparison of a plurality of instruments, and by adding the device, the operator of the user can simply train after the furnace building and debugging are finished without explaining a plurality of related thermotechnical knowledge, thereby facilitating the production management and the management of the user; through detecting the oxygen content of the area, the smoke discharge amount is controlled by the smoke discharge branch pipe electric valve through the furnace pressure sensor, so that the furnace pressure is controlled, an aerobic environment is provided for the combustion of the burner, and the small fire fine adjustment state of the low-temperature area is not easy to extinguish, so that the temperature suddenly drops. Thus stabilizing the thermal regulation of the whole furnace, improving the automatic control system of the industrial furnace and improving the automation level of the industrial furnace.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A device for preventing a burner from flameout at a low-temperature section of an industrial furnace is arranged at the tail end and a slow cooling section of a continuous industrial furnace heat preservation section and is characterized by comprising a furnace body, a hearth, a smoke exhaust branch pipeline, a smoke exhaust main pipeline, a combustion air branch pipeline, a combustion air main pipeline, a gas branch pipeline and a gas main pipeline, wherein a zirconium oxide detection box is arranged on the outer side of the furnace body and is arranged at the slow cooling section; the burner nozzles are arranged on the outer side of the furnace body and are arranged on the two sides of the furnace body; the furnace pressure sensor is arranged at the tail end of the heat preservation section at the outer side of the furnace body, and is provided with a probe which is arranged at the top between the two burners at the tail end of the heat preservation section and extends into the hearth; the smoke exhaust branch pipeline is arranged on one side of the top of the hearth and is communicated with the smoke exhaust main pipeline; the combustion-supporting air branch pipeline is arranged on the outer side of the furnace body, one end of the combustion-supporting air branch pipeline is connected with the burner, one end, far away from the burner, of the combustion-supporting air branch pipeline is communicated with the combustion-supporting air main pipeline, and the combustion-supporting air main pipeline is arranged above the furnace body; the gas branch pipeline is installed on the outer side of the furnace body, one end of the gas branch pipeline is connected with the burner, and one end, far away from the burner, of the gas branch pipeline is communicated with the gas main pipeline.

2. The device for preventing flameout of a burner of an industrial furnace in a low-temperature section is characterized in that the number of the burners is multiple.

3. The device for preventing the flameout of the burner of the low-temperature section of the industrial furnace as claimed in claim 2, wherein the burner is provided with an automatic adjusting device.

4. The device for preventing the flameout of the burner of the low-temperature section of the industrial furnace as claimed in claim 1, wherein the branch combustion air pipe is provided with an electric valve and a manual control valve, and the electric valve is arranged above the manual control valve.

5. The device for preventing the flameout of the burner of the low-temperature section of the industrial furnace as claimed in claim 1, wherein the electric valve of the smoke exhaust branch pipe is installed on the smoke exhaust branch pipe.

6. The device for preventing burner flameout in the low-temperature section of the industrial furnace according to claim 5, wherein the number of the smoke exhaust branch pipes is plural.

7. The device for preventing the flameout of the burner of the low-temperature section of the industrial furnace as claimed in claim 3, wherein a control cabinet is arranged outside the furnace body, a computer is arranged in the control cabinet, and the control lines of the zirconia detection box, the furnace pressure sensor and the automatic adjusting device of the burner are all connected with the computer in the control cabinet.