CN212030257U - Industrial furnace - Google Patents
Industrial furnace Download PDFInfo
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- CN212030257U CN212030257U CN202020203045.XU CN202020203045U CN212030257U CN 212030257 U CN212030257 U CN 212030257U CN 202020203045 U CN202020203045 U CN 202020203045U CN 212030257 U CN212030257 U CN 212030257U
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Abstract
The utility model discloses an industrial furnace with adjustable control by temperature change and air-fuel ratio establishes industrial furnace from temperature data feedback and air, gas flow data feedback and control in through, realizes industrial furnace temperature and air-fuel ratio's self-interacting. The industrial furnace specifically comprises a cavity, a heat supply system, a smoke exhaust system, an air transmission device, a fuel gas transmission device and a control system, wherein the heat supply system comprises a plurality of burner devices, and each burner device comprises a burner, an ignition electrode, an air input port and a fuel gas input port; the air transmission device comprises a plurality of air transmission branches, and each air transmission branch comprises a first branch pipeline, a first manual valve and a first electromagnetic valve; the gas transmission device comprises a plurality of gas transmission branch circuits, and each gas transmission branch circuit comprises a second branch pipeline, a second manual valve and a second electromagnetic valve.
Description
Technical Field
The utility model relates to an industrial furnace technical field specifically is a pulse combustion industrial furnace with variable air-fuel ratio.
Background
Industrial furnaces are thermal devices that heat materials or workpieces by using heat generated by burning fuel or converting electric energy in industrial production. Therefore, the industrial furnace is applied to the field of processing different materials and workpieces, but the requirements on the environment such as the temperature, the atmosphere and the like of the industrial furnace are different due to different materials, characteristics and shapes of the materials and the workpieces. However, the industrial furnace on the market at present can only adjust the ignition quantity of the combustion nozzles in the industrial furnace and adjust the temperature in the industrial furnace by simply changing instruction input, the control precision is very poor, and meanwhile, the atmosphere in the industrial furnace cannot be further adjusted, so that the material processing quality is seriously influenced.
To above problem, the utility model provides an industrial furnace with adjustable control by temperature change and air-fuel ratio establishes the industrial furnace from temperature data feedback and air, gas flow data feedback and control in through, realizes the self-interacting of industrial furnace temperature and air-fuel ratio.
SUMMERY OF THE UTILITY MODEL
The utility model provides an industrial furnace who possesses variable air-fuel ratio pulse combustion control realizes the self-interacting ability of industrial furnace temperature self-feedback, pulse combustion control and variable air-fuel ratio control.
In order to achieve the above object, the utility model adopts the following technical scheme:
an industrial furnace comprises a cavity, a heat supply system, a smoke exhaust system, an air transmission device, a fuel gas transmission device and a control system,
wherein, the heat supply part of the heat supply system is connected with the inner part of the cavity and outputs heat to the cavity of the industrial furnace, the smoke exhaust system is positioned above the cavity and is used for exhausting waste gas and waste smoke in the industrial furnace, the air pipeline and the fuel gas pipeline are connected with the heat supply system and are used for providing fuel and oxygen, the control system is connected with the air transmission device and the fuel gas transmission device and is used for controlling the opening and closing of the air transmission device and the fuel gas transmission device,
the heating system is characterized by comprising a plurality of burner devices, wherein each burner device comprises a burner, an ignition electrode, an air input port and a fuel gas input port; the air transmission device comprises a plurality of air transmission branches, and each air transmission branch comprises a first branch pipeline, a first manual valve and a first electromagnetic valve; the gas transmission device comprises a plurality of gas transmission branches, each gas transmission branch comprises a second branch pipeline, a second manual valve and a second electromagnetic valve,
the burner is positioned in the cavity, the outer extension of the burner is hermetically connected with the cavity, the ignition end of the ignition electrode is in contact with the burner and is used for igniting the burner, and the signal receiving end is connected with the control system and is used for finishing the ignition action under the instruction sent by the control system; the air input port is connected with the air transmission branch, the gas input port is connected with the gas transmission branch, the first manual valve and the first electromagnetic valve are arranged in the air transmission branch, the first electromagnetic valve is in electric signal connection with the control system, the second manual valve and the second electromagnetic valve are arranged in the gas transmission branch, and the second electromagnetic valve is in electric signal connection with the control system.
More preferably, the industrial furnace further comprises a temperature sensing system, and the temperature sensing system is arranged in the cavity and is in electric signal connection with the control system.
More preferably, the temperature sensor system can be a plurality of temperature sensors, and each temperature sensor is uniformly distributed in the cavity according to the distribution position of the burner tip device and is respectively connected with the control system through an electric signal.
In order to realize the adjustment of the air-fuel ratio in the industrial furnace, the air transmission device is also provided with a first air flow meter and an air electromagnetic main valve, the gas transmission device is provided with a first gas flow meter and a gas electromagnetic main valve, the first air flow meter and the air electromagnetic main valve are arranged on a main pipeline of the air transmission device, and the first gas flow meter and the gas electromagnetic main valve are arranged on the main pipeline of the gas transmission device.
For more accurate to temperature and air-fuel ratio control, more preferably, every air transmission branch all be equipped with the second air flow meter, the gas transmission branch is equipped with the second gas flowmeter, the second air flow meter all is connected with control system, the second gas flowmeter all is connected with control system.
In order to realize the self-feedback capacity of the air-fuel ratio of the industrial furnace, the industrial furnace further preferably comprises an oxygen analyzer, and the oxygen analyzer is arranged in the cavity and is in electric signal connection with the control system.
Drawings
FIG. 1 is a schematic view of the overall structure of an industrial furnace
FIG. 2 is a view showing the structure of the burner tip device, the air transmission branch and the gas transmission branch according to the first embodiment
FIG. 3 is a view showing the structure of a burner tip device, an air transmission branch and a gas transmission branch according to a second embodiment
Detailed Description
The structure and operation of an industrial furnace will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic view of the overall structure of the industrial furnace according to the embodiment, which includes a chamber 100, a heat supply system 200, a smoke evacuation system 300, an air transmission device 400, a gas transmission device 500, a control system 600, a temperature sensing system 700, an oxygen analyzer 800, a first gas flow meter 550, a gas solenoid main valve 540, a first air flow meter 450, and an air solenoid main valve 440, wherein the heat supply system includes a plurality of burner tip devices.
FIG. 2 is a structural diagram of each burner tip device, an air transmission branch and a fuel gas transmission branch in the heating system 800 of this embodiment,
comprises a burner 210, an ignition electrode 220, an air input port 230 and a gas input port 240.
The air delivery device 400 includes a plurality of air delivery branches including a first branch duct 410, a first manual valve 420, and a first solenoid valve 430.
The gas transmission device 500 comprises a plurality of gas transmission branches, and the gas transmission branches comprise a second branch pipeline 510, a second manual valve 520 and a second electromagnetic valve 530.
Wherein, the cavity 100 is an inner cavity for main processing materials of the industrial furnace. The heat supply part of the heat supply system 200 is connected with the inside of the cavity 100, and outputs heat to the cavity 100 of the industrial furnace. The smoke exhaust system 300 is located above the chamber 100, and is used for exhausting waste gas and waste smoke in the industrial furnace. The air transmission device 400 and the gas transmission device 500 are connected with the heating system 200 and are used for transmitting fuel and oxygen, and the opening and the closing of the devices are realized according to the control of personnel operation and a controller.
The control system 600 is a control monitoring center of the embodiment, and has functions of an external input device, a sensing device, an electromagnetic valve and other execution mechanisms, and has an audible and visual alarm function.
Specifically, the sensing device includes a temperature sensing system 700, an oxygen analyzer 800, a first air flow meter 450, and a first gas flow meter 550; the actuator includes a first solenoid valve 430, a second solenoid valve 530, an air solenoid valve 440, a gas solenoid valve 540, and an ignition electrode 220.
The burner 210 is located inside the cavity 100, the outer extension of the burner 210 is hermetically connected with the cavity 100, the ignition end of the ignition electrode 220 is in contact with the burner 210, and the signal receiving end is in electrical signal connection with the control system 600.
The air input port 230 is connected to the air transmission branch, the gas input port 240 is connected to the gas transmission branch, the first manual valve 420 and the first electromagnetic valve 430 are disposed in the air transmission branch, the first electromagnetic valve 430 is electrically connected to the control system 600, the second manual valve 520 and the second electromagnetic valve 530 are disposed in the gas transmission branch, and the second electromagnetic valve 530 is electrically connected to the control system 600.
The temperature sensing system 700 is disposed in the cavity, and may be a single temperature sensing device or a system in which a plurality of temperature sensing devices are uniformly distributed in the cavity 100, where a single temperature sensing device can only roughly monitor the temperature of the cavity 100, and the temperature sensing system 700 communicated with a plurality of temperature sensing devices can accurately monitor the temperature data of each position in the cavity 100.
In order to adjust the air-fuel ratio in the industrial furnace, the air transmission device 400 is further provided with a first air flow meter 450 and an air electromagnetic main valve 440, the gas transmission device 500 is provided with a first gas flow meter 550 and a gas electromagnetic main valve 540, the first air flow meter 450 and the air electromagnetic main valve 440 are arranged on a main pipe of the air transmission device 400, and the first gas flow meter 550 and the gas electromagnetic main valve 540 are arranged on the main pipe of the gas transmission device 500.
The first manual valve 420 and the second manual valve 520 are used for completing corresponding adjustment and switching of the industrial furnace through external force when the control system has problems.
The specific control method and principle are as follows:
a. inputting parameters: the operator presets the parameter for control system 600 through the input, and control system 600 receives control parameter, and control parameter includes: after the temperature, the combustion time and the air-fuel ratio of the industrial furnace in the cavity 100 are input, selecting a starting option by an operator, and entering the step b and initializing;
b. initialization: when an operator inputs a start command through the control system 600, the control system 600 detects the on/off states of the gas solenoid valve 540, the air solenoid valve 440, the first solenoid valve 430, and the second solenoid valve 530. If not, executing opening action, if opened, entering step c and igniting;
c. and (3) ignition: and d, controlling the ignition electrode 220 by the control system 600, starting the ignition electrode 220, igniting the burner 210, and if the burner is ignited, performing operation monitoring in the step d, and if the burner is ignited, feeding back the problem that the burner is not ignited by the control system 600 through audible and visual alarm.
d. Operation monitoring: the control system 600 performs control of the relevant executive device through a signal fed back by the sensor, and specifically includes:
d1, pulse combustion monitoring: taking a temperature sensing system composed of a plurality of temperature sensing devices as an example, when it is detected that the temperature of a certain area cannot reach the initial set temperature, the heating system 200 of the nearby area is started by opening the first electromagnetic valve 430, the second electromagnetic valve 530 and the ignition electrode 220, and when the temperature of a certain area exceeds the initial set temperature, the heating system 200 of the nearby area is closed by closing the first electromagnetic valve 430 and the second electromagnetic valve 530;
d2, variable air-fuel ratio monitoring: the flow data is transmitted to the control system 600 through the first air flow meter 450 and the first gas flow meter 550, and the control system 600 calculates the air flow and the gas flow according to the formula: the air-fuel ratio is the air flow/gas flow, the numerical calculation is carried out, the air-fuel ratio is initially set and compared,
if the calculated value is larger than the set value, which indicates that the gas flow is large, the control system 600 completes the adjustment of the air-fuel ratio by increasing the time of the air electromagnetic main valve 440 and moderately increasing the number of the burners which are not operated,
if the calculated value is less than the set value, which indicates that the air flow is large, the control system 600 completes the adjustment of the air-fuel ratio by increasing the time of the gas electromagnetic main valve 540 and moderately increasing the number of the non-operating burners.
The time of opening can be calculated according to the following. Natural gas is taken as fuel, the calorific value is 8400kcal for example, according to the burner power of 100kw, the gas flow is 10Nm3Air flow rate of 100 Nm/hour3Hour, calculate the amount of air needed for the current situation, e.g. 10Nm needed3The valve opening time is 10/100 × 3600 s-360 s.
Because the flowmeter is input type monitoring, the closed loop which can not be completed for adjusting the air-fuel ratio is poor in detection precision, and the oxygen analyzer 800 can be introduced at the moment, and the oxygen analyzer 800 is arranged in the cavity 100. The oxygen analyzer 800 detects the oxygen content in the cavity 100 and feeds back the detection data to the control system 600, so that the control of the air-fuel ratio forms a complete closed-loop control, and the air-fuel ratio control accuracy is further improved.
e. And (4) ending: the method includes two methods, one is that the control system 600 further confirms with the operator whether to change the operation time 30 seconds before the set time is reached, if the operator does not respond within 30 seconds, the industrial furnace is normally stopped, and the other method is that the operator instructs the control system 600 to stop the operation of the industrial furnace through the input device, and the industrial furnace is immediately stopped.
In order to make the air-fuel ratio control more accurate, the patent also provides a second embodiment, as shown in fig. 3 on the basis of the first embodiment, each air delivery branch is provided with a second air flow meter 460, each gas delivery branch is provided with a second gas flow meter 560, the second air flow meters 460 are electrically connected with the control system 600, and the second gas flow meters 560 are electrically connected with the control system 600.
The control system 600 further controls the switch sizes of the first solenoid valve 430 and the second solenoid valve 530 through the data monitored by the second air flow meter 460 and the second air flow meter 560 to complete the air-fuel ratio adjustment of the single heating system.
Claims (7)
1. An industrial furnace comprises a cavity, a heat supply system, a smoke exhaust system, an air transmission device, a fuel gas transmission device and a control system,
wherein, the heat supply part of the heat supply system is connected with the inner part of the cavity and outputs heat to the cavity of the industrial furnace, the smoke exhaust system is positioned above the cavity and is used for exhausting waste gas and waste smoke in the industrial furnace, the air pipeline and the fuel gas pipeline are connected with the heat supply system and are used for providing fuel and oxygen, the control system is connected with the air transmission device and the fuel gas transmission device and is used for controlling the opening and closing of the air transmission device and the fuel gas transmission device,
the heating system is characterized by comprising a plurality of burner devices, wherein each burner device comprises a burner, an ignition electrode, an air input port and a fuel gas input port; the air transmission device comprises a plurality of air transmission branches, and each air transmission branch comprises a first branch pipeline, a first manual valve and a first electromagnetic valve; the gas transmission device comprises a plurality of gas transmission branches, each gas transmission branch comprises a second branch pipeline, a second manual valve and a second electromagnetic valve,
the burner is positioned in the cavity, the outer extension of the burner is hermetically connected with the cavity, the ignition end of the ignition electrode is in contact with the burner and is used for igniting the burner, and the signal receiving end is connected with the control system and is used for finishing the ignition action under the instruction sent by the control system; the air input port is connected with the air transmission branch, the gas input port is connected with the gas transmission branch, the first manual valve and the first electromagnetic valve are arranged in the air transmission branch, the first electromagnetic valve is in electric signal connection with the control system, the second manual valve and the second electromagnetic valve are arranged in the gas transmission branch, and the second electromagnetic valve is in electric signal connection with the control system.
2. The industrial furnace of claim 1 further comprising a temperature sensing system disposed within the chamber and in electrical communication with the control system.
3. An industrial furnace as claimed in claim 2 wherein said temperature sensing system comprises a plurality of temperature sensors, each temperature sensor being uniformly distributed within the chamber depending on the location of the burner tip assembly and being in electrical communication with the control system.
4. The industrial furnace as claimed in any one of claims 1 to 3, wherein the air transmission device further comprises a first air flow meter and a first electromagnetic gas valve, the gas transmission device comprises a first gas flow meter and a first electromagnetic gas valve, the first air flow meter and the first electromagnetic gas valve are arranged on the main pipe of the air transmission device, and the first gas flow meter and the first electromagnetic gas valve are arranged on the main pipe of the gas transmission device.
5. The industrial furnace as claimed in any one of claims 1 to 3, wherein each air delivery branch is provided with a second air flow meter, the gas delivery branch is provided with a second gas flow meter, the second air flow meters are connected with the control system, and the second gas flow meters are connected with the control system.
6. The industrial furnace of claim 4, further comprising an oxygen analyzer disposed within the chamber and in electrical communication with the control system.
7. The industrial furnace of claim 5, further comprising an oxygen analyzer disposed within the chamber and in electrical communication with the control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020203045.XU CN212030257U (en) | 2020-02-24 | 2020-02-24 | Industrial furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020203045.XU CN212030257U (en) | 2020-02-24 | 2020-02-24 | Industrial furnace |
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| Publication Number | Publication Date |
|---|---|
| CN212030257U true CN212030257U (en) | 2020-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020203045.XU Active CN212030257U (en) | 2020-02-24 | 2020-02-24 | Industrial furnace |
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| Country | Link |
|---|---|
| CN (1) | CN212030257U (en) |
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2020
- 2020-02-24 CN CN202020203045.XU patent/CN212030257U/en active Active
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