CN114777484A - Baking system and control method - Google Patents
Baking system and control method Download PDFInfo
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- CN114777484A CN114777484A CN202210701222.0A CN202210701222A CN114777484A CN 114777484 A CN114777484 A CN 114777484A CN 202210701222 A CN202210701222 A CN 202210701222A CN 114777484 A CN114777484 A CN 114777484A
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- baking furnace
- baking
- temperature
- air supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0034—Regulation through control of a heating quantity such as fuel, oxidant or intensity of current
- F27D2019/004—Fuel quantity
- F27D2019/0043—Amount of air or O2 to the burner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0059—Regulation involving the control of the conveyor movement, e.g. speed or sequences
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- General Engineering & Computer Science (AREA)
- Tunnel Furnaces (AREA)
Abstract
The invention belongs to the technical field of baking systems, and discloses a baking system and a control method, wherein the baking system comprises a baking furnace, a conveying device and a control unit, a first temperature sensor is arranged in the baking furnace, materials can enter the baking furnace to be baked along with the conveying of the conveying device and then are moved out of the baking furnace, and the first temperature sensor and the conveying device are in signal connection with the control unit, so that the baking system can control the conveying speed of the conveying device according to the temperature in the baking furnace detected by the first temperature sensor, the baking time of the materials in the baking furnace is further controlled, the automatic control of the baking system is realized, the response speed is shortened, the production difficulty is reduced, and the product quality and the product percent of pass are improved.
Description
Technical Field
The invention relates to the technical field of baking systems, in particular to a baking system and a control method.
Background
The baking furnace is widely applied to modern industrial production as baking equipment for materials. In order to ensure the quality and the qualification rate of products, strict requirements are generally imposed on the temperature in the baking furnace, and if the baking temperature is too low or too high, the quality and the qualification rate of the products are reduced.
In the traditional process flow, the temperature of the baking furnace is usually adjusted by experienced workers, and the method not only requires operators to have rich production experience, but also has longer adjustment response speed and lower operability, so that the production is difficult, and the product quality and the product qualification rate are not improved.
Therefore, it is desirable to provide a baking system and a control method thereof to solve the above-mentioned problems.
Disclosure of Invention
An object of the present invention is to provide a baking system, which can adjust the conveying speed of a conveyor according to the temperature inside a baking oven, thereby achieving the effect of adjusting the baking time of the material on the conveyor, and achieving the effect of automatic control of the baking system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a torrefaction system comprising:
a baking furnace, wherein a first temperature sensor is arranged in the baking furnace;
the conveying device is used for conveying the materials into the baking furnace for baking and conveying the baked materials out of the baking furnace;
the control unit, first temperature sensor and conveyer all with the control unit signal connection, the control unit can be according to the temperature control conveyer's in the baking furnace that first temperature sensor detected conveying speed.
Optionally, the baking system further comprises a heat supply unit, the heat supply unit is communicated with the baking furnace, the heat supply unit can supply heat to the baking furnace, the heat supply unit is in signal connection with the control unit, and the control unit can control the heat supplied by the heat supply unit according to the temperature detected by the first temperature sensor in the baking furnace.
Optionally, the heat supply unit includes a burner, a combustible gas supply module, and a combustion-supporting gas supply module, the burner is communicated with the baking furnace, both the combustible gas supply module and the combustion-supporting gas supply module are communicated with the burner, the combustion-supporting gas supply module is in signal connection with the control unit, and the control unit can control the air supply amount of the combustion-supporting gas according to the temperature in the baking furnace detected by the first temperature sensor.
Another object of the present invention is to provide a control method capable of controlling the start-up of the baking system according to the temperature in the baking furnace at the initial stage of the start-up of the baking system, thereby reducing the defective rate of the product.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method of the baking system comprises the following steps:
starting the burner, the combustible gas supply module and the combustion-supporting gas supply module, and increasing the temperature T in the baking furnace, wherein the initial air supply amount of the combustion-supporting gas supply module is a preset air supply amount;
when T is less than Tmin and T is more than Tmax, the material baked by the baking furnace is a non-qualified product;
detecting the temperature T;
if Tmin is not less than T and not more than Tmax, starting the conveying device to convey the materials to the baking furnace, wherein the initial conveying speed of the conveying device is a preset conveying speed.
Optionally, when Ta is more than or equal to T and less than or equal to Tb and the conveying speed is a preset conveying speed, the material baked by the baking furnace is a qualified product, wherein Tmin is more than Ta and more than Tb and less than Tmax;
adjusting the conveying speed and the air supply quantity according to the detected value of the temperature T:
if T is more than or equal to Ta and less than or equal to Tb, keeping the transmission speed at a preset transmission speed and keeping the air supply quantity at a preset air supply quantity;
if Tmin is less than or equal to T and less than Ta, increasing the air supply amount and reducing the conveying speed;
if Tb < T ≦ Tmax, the amount of air supply is decreased and the transport speed is increased.
Optionally, the temperature T is detected once every other first preset time, and if Tmin is less than or equal to T and less than Ta, the air supply amount is continuously increased.
Alternatively, when the air supply amount reaches the maximum air supply amount of the combustion-supporting gas supply module, if T < Ta, the roasting system is stopped.
Optionally, the temperature T is detected once every second preset time period, and if Tb is greater than T and less than or equal to Tmax, the air supply amount is continuously decreased.
Alternatively, when the air supply amount reaches the minimum air supply amount of the combustion-supporting gas supply module, if T > Tb, the roasting system is stopped.
Alternatively, after the conveyor is activated, the torrefaction system is shut down when T < Tmin and T > Tmax.
Has the advantages that:
according to the baking system provided by the invention, the first temperature sensor is arranged in the baking furnace, part of the conveying device is positioned outside the baking furnace, the materials enter the baking furnace along with the conveying of the conveying device and are then moved out of the baking furnace, and the first temperature sensor and the conveying device are in signal connection with the control unit, so that the baking system can control the conveying speed of the conveying device according to the temperature in the baking furnace detected by the first temperature sensor, further the baking time of the materials in the baking furnace is controlled, the automatic control of the baking system is realized, the response speed is shortened, the production difficulty is reduced, and the improvement of the product quality and the product qualification rate is facilitated.
The control method of the baking system provided by the invention sets the initial air supply quantity of the combustion-supporting gas supply module as a preset air supply quantity, and when the temperature T in the baking furnace is less than Tmin and the temperature T in the baking furnace is greater than Tmax, the material baked by the baking furnace is a non-qualified product; and starting a burner, a combustible gas supply module and a combustion-supporting gas supply module in the baking system, wherein the burner transfers heat to the baking furnace to raise the temperature T in the baking furnace, detecting the temperature T, and starting a conveying device to convey materials to the baking furnace at a preset conveying speed when T is not less than Tmin and not more than Tmax. According to the control method of the baking system, the burner, the combustible gas supply module and the combustion-supporting gas supply module are started firstly at the initial starting stage of the baking system, and the conveying device is started after the temperature T in the baking furnace reaches a certain value, so that the problem of non-qualified products caused by baking materials due to the fact that the temperature T in the baking furnace is smaller than Tmin or larger than Tmax at the initial starting stage of the baking system is solved, and the defective rate of products is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a baking system provided in the present embodiment;
FIG. 2 is a schematic view of the material processing flow in this example;
fig. 3 is a control flowchart of the roasting system provided in the present embodiment from the start-up.
In the figure:
100. baking the furnace; 110. a first temperature sensor; 200. a conveying device; 210. a servo motor; 300. a control unit; 410. a burner; 420. a combustible gas supply module; 421. a combustible gas delivery pipe; 422. a first electrically operated valve; 430. a combustion-supporting gas supply module; 431. a magnetic suspension blower; 432. a combustion-supporting gas delivery pipe; 433. a second electrically operated valve; 434. a ripple compensator; 500. a gas mixing chamber; 510. a concentration detector; 520. a mixed gas delivery pipe; 530. a third electrically operated valve; 600. and (5) heating the furnace.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used based on the orientations or positional relationships shown in the drawings for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
This embodiment provides a baking system, can be according to the conveying speed of the temperature regulation conveyer in baking the stove, and then played the effect of the stoving time of adjusting the last material of conveyer, reached baking system automatic control's effect.
Specifically, as shown in fig. 1, the baking system includes a baking furnace 100, a conveying device 200, and a control unit 300, a first temperature sensor 110 is disposed in the baking furnace 100, the conveying device 200 is configured to convey a material into the baking furnace 100 for baking and convey the baked material out of the baking furnace 100, both the first temperature sensor 110 and the conveying device 200 are in signal connection with the control unit 300, and the control unit 300 is capable of controlling a conveying speed of the conveying device 200 according to a temperature in the baking furnace 100 detected by the first temperature sensor 110.
In the baking system, the material enters the baking furnace 100 to be baked along with the conveying of the conveying device 200 and then moves out of the baking furnace 100, and under the action of the first temperature sensor 110 and the control unit 300, the conveying speed of the conveying device 200 can be controlled according to the temperature in the baking furnace 100, so that the effect of controlling the baking time of the material in the baking furnace 100 according to the temperature in the baking furnace 100 is achieved, the automatic control of the baking system is realized, the response speed is shortened, the production difficulty is reduced, and the product quality and the product qualification rate are improved.
Further, the conveying device 200 includes a conveyor belt and a servo motor 210, a part of the conveyor belt is located in the baking furnace 100, a part of the conveyor belt is located outside the baking furnace 100, the conveyor belt conveys the material under the driving of the servo motor 210, and the servo motor 210 is connected with the control unit 300 in model to realize the adjustment of the conveying speed of the conveyor belt. It is understood that in other embodiments, the transfer device 200 may be other transfer devices 200 such as a robot.
Optionally, as shown in fig. 1, the baking system further includes a heat supply unit, the heat supply unit is communicated with the baking furnace 100 to supply heat to the baking furnace 100, and the heat supply unit is in signal connection with the control unit 300 to control the amount of heat supplied by the heat supply unit according to the temperature detected by the first temperature sensor 110 in the baking furnace 100, so as to achieve the effect of controlling the temperature in the baking furnace 100, achieve the control of the baking system over two dimensions, namely the temperature in the baking furnace 100 and the material baking time, and provide a further guarantee function for improving the product quality and the product yield.
Further, as shown in fig. 1, the heat supply unit includes a burner 410, a combustible gas supply module 420 and a combustion-supporting gas supply module 430, the burner 410 is communicated with the baking furnace 100, both the combustible gas supply module 420 and the combustion-supporting gas supply module 430 are communicated with the burner 410 to deliver combustible gas and combustion-supporting gas to the burner 410, and heat generated by combustion of the combustible gas and the combustion-supporting gas in the burner 410 is transferred to the baking furnace 100 to bake the materials in the baking furnace 100. A second temperature sensor is provided in the burner 410 in signal connection with the control unit 300 to detect the temperature inside the burner 410. The combustion-supporting gas supply module 430 is in signal connection with the control unit 300 to control the air supply amount of the combustion-supporting gas according to the temperature in the baking furnace 100 detected by the first temperature sensor 110, and the combustion intensity of the combustible gas and the combustion-supporting gas in the burner 410 can be increased or decreased along with the increase or decrease of the air supply amount of the combustion-supporting gas, so that adjusting the air supply amount of the combustion-supporting gas has the effect of adjusting the flame intensity in the burner 410, and adjusting the effect of transferring heat from the burner 410 to the baking furnace 100. In addition, in actual production, combustible gas is usually provided by a special process section in a plant area, and the pressure and the flow of the combustible gas are generally constant, so that the method for adjusting the air supply quantity of the combustion-supporting gas in the embodiment has stronger practicability.
Further, as shown in fig. 1, in this embodiment, the combustible gas supply module 420 includes a combustible gas delivery pipe 421, the combustible gas delivery pipe 421 is provided with a first electric valve 422 in signal connection with the control unit 300, and is used for controlling on/off of the combustible gas delivery pipe 421, and the combustible gas delivery pipe 421 is further provided with conventional pipe fittings such as a check valve, a safety valve, a thermometer, and a pressure gauge. The combustion-supporting gas supply module 430 comprises a magnetic suspension blower 431 and a combustion-supporting gas delivery pipe 432, and an air outlet of the magnetic suspension blower 431 is communicated with the combustion-supporting gas delivery pipe 432 through a corrugated compensator 434, so that the acting force on the magnetic suspension blower 431 and the combustion-supporting gas delivery pipe 432 due to installation errors is reduced, and the effect of vibration and noise reduction is also achieved. The combustion-supporting gas conveying pipe 432 is provided with a second electric valve 433 in signal connection with the control unit 300 and used for controlling the on-off of the combustion-supporting gas conveying pipe 432, and in addition, the combustion-supporting gas conveying pipe 432 is also provided with conventional pipeline accessories such as a one-way valve, a manual butterfly valve, a thermometer, a pressure gauge, an orifice flowmeter and the like. It should be noted that in the technical solution provided in this embodiment, the combustion-supporting gas is oxygen, and compared with other combustion-supporting gases, the oxygen can be obtained by a simple device such as a blower, and certainly, in other embodiments, the combustion-supporting gas may also be a gas such as chlorine or ozone. In the embodiment, the oxygen is supplied by the magnetic levitation blower 431, and compared with other devices, the magnetic levitation blower 431 has the advantages of high integration, high efficiency, energy saving and the like. In the technical solution provided in this embodiment, the magnetic levitation blower 431 is in signal connection with the control unit 300 to realize the adjustment of the air output of the magnetic levitation blower 431 and further the adjustment of the oxygen supply amount, but in other embodiments, the adjustment of the oxygen supply amount may also be realized by adjusting the opening and closing degree of the second electrically operated valve 433.
Optionally, as shown in fig. 1, the heat supply unit further includes a gas mixing chamber 500, a concentration detector 510 is disposed in the gas mixing chamber 500, both the combustion-supporting gas delivery pipe 432 and the combustible gas delivery pipe 421 are communicated with the gas mixing chamber 500, the gas mixing chamber 500 is communicated with the burner 410 through a mixed gas delivery pipe 520, a third electric valve 530 is disposed on the mixed gas delivery pipe 520, the third electric valve 530 is in signal connection with the control unit 300, the combustion-supporting gas and the combustible gas are mixed in the gas mixing chamber 500, when the concentration of the mixed gas detected by the concentration detector 510 reaches a set concentration range, the control unit 300 controls the third electric valve 530 to open, the mixed gas enters the burner 410 through the mixed gas delivery pipe 520, when the concentration of the mixed gas detected by the concentration detector 510 exceeds the set concentration range, the control unit 300 controls the first electric valve 422, the second electric valve 433 and the third electric valve 530 to close, ensuring the production safety.
The embodiment also provides a control method of the baking system, which has the effect of reducing the defective rate of products.
Specifically, the control method includes the steps of:
starting the burner 410, the combustible gas supply module 420 and the combustion-supporting gas supply module 430, and increasing the temperature T in the baking furnace 100, wherein the initial air supply amount of the combustion-supporting gas supply module 430 is a preset air supply amount; when T is less than Tmin and T is more than Tmax, the material baked by the baking furnace 100 is a non-qualified product; detecting the temperature T by the first temperature sensor 110; if Tmin is not less than T and not more than Tmax, the conveying device 200 is started to convey the material to the baking furnace 100, and the initial conveying speed of the conveying device 200 is the preset conveying speed.
According to the control method of the baking system, at the initial stage of starting the baking system, the burner 410, the combustible gas supply module 420 and the combustion-supporting gas supply module 430 are started firstly, and the conveying device 200 is started after the temperature T in the baking furnace 100 reaches a certain value, so that the problem of non-qualified products caused by baking materials at the temperature T in the baking furnace 100 which is less than Tmin or more than Tmax at the initial stage of starting the baking system is avoided, the defective rate of products is reduced, and the problem of material waste caused by the production of the non-qualified products is also reduced.
Further, when T is more than or equal to Ta and less than or equal to Tb and the conveying speed is a preset conveying speed, the material baked by the baking furnace 100 is a qualified product, wherein Tmin is more than Ta and more than Tb and more than Tmax; the control unit 300 adjusts the delivery speed and the air supply amount according to the temperature T fed back by the first temperature sensor 110, specifically:
if T is more than or equal to Ta and less than or equal to Tb, keeping the conveying speed at the preset conveying speed, and keeping the air supply quantity at the preset air supply quantity, so that the baking system continuously bakes qualified products meeting the standard requirements;
if Tmin is less than or equal to T and less than Ta, the control unit 300 controls the air supply amount of the combustion-supporting gas supply module 430 to increase so as to enhance the flame intensity in the burner 410, increase the heat provided by the burner 410 to the baking furnace 100, and further increase the temperature T so that the temperature T is close to the Ta and Tb ranges, or reaches the Ta to Tb temperature range; meanwhile, the control unit 300 controls the transmission speed of the transmission device 200 to be reduced, so that the transmission device 200 can transmit the material at a lower speed, the time for baking the material in the baking furnace 100 is prolonged, and the probability of qualified products baked by a baking system is improved;
if Tb is greater than T and less than or equal to Tmax, the control unit 300 controls the air supply amount of the combustion-supporting gas supply module 430 to decrease, so as to weaken the flame intensity in the burner 410, decrease the heat provided by the burner 410 to the baking furnace 100, and further decrease the temperature T, so that the temperature T is close to the Ta and Tb ranges, or reaches the Ta to Tb temperature range; meanwhile, the control unit 300 controls the transmission speed of the transmission device 200 to increase, so that the transmission device 200 can transmit the material at a higher speed, thereby shortening the time for baking the material in the baking furnace 100 and improving the probability of qualified products baked by the baking system.
According to the control method, the baking system is controlled from two dimensions of the temperature T and the conveying speed, the probability of producing qualified products is improved, and the problem of material waste caused by producing unqualified products is also reduced.
Further, a first preset time is set in the control unit 300, and every other first preset time, the first temperature sensor 110 detects and feeds back the temperature T to the control unit 300 once, and if Tmin is less than or equal to T and less than Ta, the control unit 300 controls the air supply amount of the combustion-supporting gas supply module 430 to continue to increase according to a certain proportion. Under the condition that all parts of the baking system are normal, the temperature T in the baking furnace 100 is continuously increased along with the continuous increase of the air supply quantity, so that the temperature T is continuously closed to the range of Ta and Tb or reaches the temperature range of Ta to Tb, and the probability of baking qualified products by the baking system is further improved. In the present embodiment, the air supply source of the combustion-supporting gas supply module 430 is the magnetic suspension blower 431, and the air volume adjustment mode of the magnetic suspension blower 431 in the present stage is a proportional adjustment mode, so in the present embodiment, the air volume of the combustion-supporting gas supply module 430 is also increased according to a certain proportion, and in other embodiments, the air volume of the combustion-supporting gas supply module 430 is increased by adopting a linear increase mode, for example.
Further, when the air supply amount of the combustion-supporting gas supply module 430 reaches the maximum air supply amount thereof, if T is still less than Ta, the control unit 300 controls the baking system to stop according to the first sequence, so as to reduce the probability that the baking system produces non-qualified products.
Further, the first sequence includes that the conveying device 200 is closed before the heating unit, so that the waste of materials is avoided, and the effect of saving the materials is achieved.
Further, the first sequence further comprises the final closing of the combustion-supporting gas supply module 430, i.e. after the conveyor 200 is closed, the first electric valve 422, the second electric valve 433 and the third electric valve 530 are closed, and the final closing of the combustion-supporting gas supply module 430 is performed, so as to ensure the safety of the whole roasting system.
Further, when the air supply amount of the combustion-supporting gas supply module 430 reaches the maximum air supply amount, if the temperature T fed back to the control unit 300 by the first temperature sensor 110 each time reaches the temperature range from Ta to Tb, the control unit 300 controls the transmission speed of the transmission device 200 to recover the preset transmission speed, and at the same time, the control unit 300 controls the air supply amount of the combustion-supporting gas supply module 430 to recover the preset air supply amount, so that the baking system continuously bakes qualified products meeting the standard requirements.
Optionally, a second preset time period is set in the control unit 300, every second preset time period, the first temperature sensor 110 detects and feeds back the temperature T to the control unit 300 once, if Tb is greater than T and less than or equal to Tmax, the control unit 300 controls the air supply of the combustion-supporting gas supply module 430 to be continuously reduced according to a certain proportion, and under the condition that the components of the baking system are all normal, the temperature T in the baking furnace 100 is reduced along with the continuous reduction of the air supply, so that the temperature T is continuously closed to the Ta and Tb ranges, or reaches the temperature range from Ta to Tb, so as to further improve the probability that the baking system bakes qualified products. In the present embodiment, the air supply source of the combustion-supporting gas supply module 430 is the magnetic suspension blower 431, and the air volume adjustment method of the magnetic suspension blower 431, which is common at present, is proportional adjustment, so in the present embodiment, the air volume of the combustion-supporting gas supply module 430 is also reduced according to a certain proportion, and in other embodiments, the air volume of the combustion-supporting gas supply module 430 may be reduced by linear increase, for example. It should be noted that the second preset time period may be equal to or different from the first preset time period, and may be determined according to an actual use condition.
Further, when the air supply amount of the combustion-supporting gas supply module 430 reaches the minimum air supply amount thereof, if T is still greater than Tb, the control unit 300 controls the baking system to stop according to the first sequence, so as to reduce the probability that the baking system produces non-qualified products.
Further, the first sequence includes that the conveying device 200 is closed before the heating unit, so that the waste of materials is avoided, and the effect of saving the materials is achieved.
Further, the first sequence further comprises the final closing of the combustion-supporting gas supply module 430, i.e. after the conveyor 200 is closed, the first electric valve 422, the second electric valve 433 and the third electric valve 530 are closed, and the final closing of the combustion-supporting gas supply module 430 is performed, so as to ensure the safety of the whole roasting system.
Further, when the air supply amount of the combustion-supporting gas supply module 430 reaches the minimum air supply amount, if the temperature T fed back to the control unit 300 by the first temperature sensor 110 each time reaches the temperature range from Ta to Tb, the control unit 300 controls the transmission speed of the transmission device 200 to recover the preset transmission speed, and at the same time, the control unit 300 controls the air supply amount of the combustion-supporting gas supply module 430 to recover the preset air supply amount, so that the baking system continuously bakes qualified products meeting the standard requirements.
Optionally, after the control unit 300 controls the conveyor 200 to start, when T < Tmin and T > Tmax, the control unit 300 controls the torrefaction systems to stop according to the second sequence, when T < Tmin and T > Tmax, the torrefaction systems have a high probability of failure, and at this time, the torrefaction systems need to be stopped and repaired.
Further, the second sequence includes that the conveyor 200 and the heating unit are turned off at the same time, and when T < Tmin or T > Tmax, there is a high possibility that major components in the torrefaction system, such as the magnetic levitation blower 431, the burner 410, etc., are out of order, and at this time, the conveyor 200 and the heating unit are turned off at the same time, which plays a role in saving materials while ensuring the safety of the torrefaction system.
The control flow of the baking system in this embodiment is briefly described below with reference to the material processing process flow:
as shown in fig. 2, the raw material enters the heating furnace 600 to be heated for one time to form a semi-finished material, the semi-finished material enters the baking furnace 100 to be baked by the conveying device 200 to form a finished product, during baking, oxygen and the combustible gas are respectively introduced into the gas mixing chamber 500, after being uniformly mixed in the gas mixing chamber 500, the mixed gas enters the burner 410 to be burned, and the burner 410 transfers heat to the baking furnace 100 to bake the material.
As shown in fig. 3, after the baking system is started, the magnetic suspension blower 431 is started and the second electric valve 433 is opened, oxygen is introduced into the gas mixing chamber 500, the control unit 300 monitors whether the air output of the magnetic suspension blower 431 reaches the preset air output, when the air output of the magnetic suspension blower 431 reaches the preset air output, the control unit 300 controls the first electric valve 422 to be opened, combustible gas is introduced into the gas mixing chamber 500, the combustible gas and oxygen are mixed in the gas mixing chamber 500, the concentration ratio of the mixed gas in the gas mixing chamber 500 is detected by the concentration detector 510 and fed back to the control unit 300, when the concentration ratio of the gas reaches the preset concentration ratio, the control unit 300 controls the third electric valve 530 to be opened, the burner 410 is ignited, as the burner 410 is started, the temperature in the baking furnace 100 starts to rise from the room temperature, the temperature T in the baking furnace 100 is detected by the first temperature sensor 110 and fed back to the control unit 300, when Tmin is less than or equal to T and less than or equal to Tmax, the control unit 300 controls the conveying device 200 to start conveying the materials into the baking furnace 100, the materials are conveyed out of the baking furnace 100 by the conveying device 200 after being baked in the baking furnace 100, at this time, the conveying speed of the conveying device 200 is a preset conveying speed, the first temperature sensor 110 detects and feeds back the temperature T in the baking furnace 100 to the control unit 300, if Ta is less than or equal to T and less than or equal to Tb, the conveying speed is kept at the preset conveying speed, and the air supply amount is kept at the preset air supply amount;
if Tmin is less than or equal to T and less than Ta, increasing the air supply amount and reducing the transmission speed, detecting and feeding back the temperature T in the baking furnace 100 to the control unit 300 by the first temperature sensor 110 every other first preset time, simultaneously controlling the air supply amount of the magnetic suspension blower 431 to continue to increase by the control unit 300, and when the air supply amount of the magnetic suspension blower 431 reaches the maximum air supply amount thereof, if the temperature T is still less than Ta, controlling the baking system to stop according to a first sequence by the control unit 300; when the air volume of the magnetic levitation blower 431 reaches the maximum air volume, the temperature T fed back to the control unit 300 by the first temperature sensor 110 each time reaches the temperature range from Ta to Tb (i.e., Ta is less than or equal to T and less than or equal to Tb), then the control unit 300 controls the transmission speed of the transmission device 200 to recover the preset transmission speed, and the air volume of the magnetic levitation blower 431 to recover the preset air volume;
if Tb is less than or equal to Tmax, decreasing the air supply amount and increasing the transfer speed, and every second preset time interval, the first temperature sensor 110 detects and feeds back the temperature T in the baking furnace 100 to the control unit 300, and at the same time, the control unit 300 controls the air supply amount of the magnetic suspension blower 431 to continue decreasing, and when the air supply amount of the magnetic suspension blower 431 reaches the minimum air supply amount thereof, if the temperature T is still greater than Tb, the control unit 300 controls the baking system to stop according to the first sequence; when the air volume of the magnetic levitation blower 431 reaches the minimum air volume, the temperature T fed back to the control unit 300 by the first temperature sensor 110 each time reaches the temperature range from Ta to Tb (i.e., Ta is less than or equal to T and less than or equal to Tb), then the control unit 300 controls the transmission speed of the transmission device 200 to recover the preset transmission speed, and the air volume of the magnetic levitation blower 431 to recover the preset air volume;
when the conveyor 200 is started, if the first temperature sensor 110 detects and feeds back to the control unit 300 that the temperature T in the primary baking furnace 100 is less than Tmin and the temperature T is greater than Tmax, the control unit 300 controls the baking system to stop in the second order.
In the baking system and the control method of the baking system provided by the embodiment, the magnetic suspension blower 431 is used for introducing combustion-supporting gas into the gas mixing chamber 500, and the combustion-supporting gas is fully mixed with the combustible gas in the gas mixing chamber 500, so that the combustible gas can be fully combusted, the combustion performance is improved, and the energy loss is reduced; the air output of the magnetic suspension blower 431 and the conveying speed of the conveying device 200 are adjusted according to the temperature in the baking furnace 100, so that the materials can be baked and processed in a proper temperature environment and a proper baking time period all the time, the automatic control of a baking system is realized, the product quality and the product qualification rate are improved, and the probability of material waste is reduced.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A method of controlling a torrefaction system, comprising:
the device comprises a baking furnace (100), wherein a first temperature sensor (110) is arranged in the baking furnace (100);
a conveyor (200), said conveyor (200) being adapted to convey material into said roaster (100) for roasting and to convey said roasted material out of said roaster (100);
a control unit (300), wherein the first temperature sensor (110) and the conveying device (200) are in signal connection with the control unit (300), and the control unit (300) can control the conveying speed of the conveying device (200) according to the temperature in the baking furnace (100) detected by the first temperature sensor (110);
the heat supply unit is communicated with the baking furnace (100), the heat supply unit can supply heat to the baking furnace (100), the heat supply unit is in signal connection with the control unit (300), and the control unit (300) can control the heat supplied by the heat supply unit according to the temperature in the baking furnace (100) detected by the first temperature sensor (110);
the heat supply unit comprises a burner (410), a combustible gas supply module (420) and a combustion-supporting gas supply module (430), the burner (410) is communicated with the baking furnace (100), both the combustible gas supply module (420) and the combustion-supporting gas supply module (430) are communicated with the burner (410), the combustion-supporting gas supply module (430) is in signal connection with the control unit (300), and the control unit (300) can control the air supply amount of the combustion-supporting gas according to the temperature in the baking furnace (100) detected by the first temperature sensor (110);
the control method comprises the following steps:
starting the burner (410), the combustible gas supply module (420) and the combustion-supporting gas supply module (430), wherein the temperature T in the baking furnace (100) is increased, and the initial air supply amount of the combustion-supporting gas supply module (430) is a preset air supply amount;
when T is less than Tmin and T is more than Tmax, the material baked by the baking furnace (100) is a non-qualified product;
detecting the temperature T;
if Tmin is not less than T and not more than Tmax, starting the conveying device (200) to convey the materials to the baking furnace (100), wherein the initial conveying speed of the conveying device (200) is a preset conveying speed;
when T is more than or equal to Ta and less than or equal to Tb and the conveying speed is the preset conveying speed, the material baked by the baking furnace (100) is a qualified product, wherein Tmin is more than Ta and more than Tb and more than Tmax;
adjusting the delivery speed and the air supply amount according to the detected value of the temperature T:
if T is more than or equal to Ta and less than or equal to Tb, keeping the transmission speed as the preset transmission speed, and keeping the air supply quantity as the preset air supply quantity;
if Tmin is more than or equal to T and less than Ta, increasing the air supply amount and reducing the transmission speed;
if Tb is more than T and less than or equal to Tmax, the air supply quantity is reduced and the transmission speed is increased.
2. The control method according to claim 1, wherein the temperature T is detected every first preset time period, and if Tmin ≦ T < Ta, the air supply amount is continuously increased.
3. The control method according to claim 2, characterized in that when the air supply amount reaches the maximum air supply amount of the combustion-supporting gas supply module (430), the torrefaction system is stopped if T < Ta.
4. The control method according to claim 1, wherein the temperature T is detected every second preset period, and the amount of air supply is continuously reduced if Tb < T ≦ Tmax.
5. The control method according to claim 4, characterized in that when said air supply reaches a minimum air supply of said comburent gas supply module (430), if T > Tb, the torrefaction system is stopped.
6. A control method according to any one of claims 1-5, characterized in that, after activation of the conveyor (200), the torrefaction system is shut down when T < Tmin and T > Tmax.
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| CN202210701222.0A CN114777484A (en) | 2022-06-21 | 2022-06-21 | Baking system and control method |
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| CN202210701222.0A CN114777484A (en) | 2022-06-21 | 2022-06-21 | Baking system and control method |
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Cited By (1)
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| CN116951434A (en) * | 2023-07-28 | 2023-10-27 | 广州超凌热力设备有限公司 | Acid-base waste gas treatment device and waste heat recycling device |
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