JP2556030B2 - Burner combustion controller for dryer - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner combustion control system,
It can be used in a dryer for drying grains.

Conventional technology Conventionally, a hot air temperature generated from a burner is set, and fuel is supplied to a diffusion cylinder that is rotationally driven to reach the set hot air temperature, and the fuel and combustion air are mixed in the diffusion cylinder. Then, the vaporized fuel is jetted and combusted from the jet port formed between the diffusion cylinder and the jet combustion plate.

Problems to be Solved by the Invention For example, when a burner is used in a grain dryer, the hot air temperature generated from this burner is set by the amount of grain to be dried, etc., and when the burner is started, it is rotationally driven. A set amount of ignition fuel is supplied into the diffusion cylinder for a certain period of time, the ignition fuel and combustion air are mixed and vaporized in the diffusion cylinder, and the vaporized fuel is discharged between the jet combustion plate and the diffusion cylinder. From the jet outlet formed in the above, jet combustion is performed to form a combustion flame, and after a certain ignition fuel supply time elapses, fuel and combustion air are supplied into the diffusion cylinder so as to reach the set hot air temperature and jet combustion Becomes a combustion flame, and this combustion flame is sucked by an exhaust fan provided in the dryer to become hot air, and the grains are exposed to this hot air to dry, but at the time of this drying operation, from the amount of ignition fuel When the amount of fuel at the set hot air temperature changes If the outside air temperature is low and the set hot air temperature is high, the amount of fuel supplied is controlled in stages, so it takes a long time to reach the set hot air temperature, or On the contrary, if the outside air temperature is high and the set hot air temperature is low, the hot air temperature may exceed the set hot air temperature, which may cause distrust to the operator or start re-drying. At times, the grain is exposed to hot air at a temperature higher than the set hot air temperature,
As a result, the quality of the grain may decrease.

Means for Solving Problems The present invention is proposed to solve the problems described above, and is a diffusion cylinder 1 for inducing and diffusing fuel by rotation.
An ejection combustion board 3 having an ejection port 2 for ejecting and burning vaporized fuel; an outside air temperature sensor 4 for detecting an outside air temperature;
In a dryer having a hot air temperature setting device 51 for setting the hot air temperature, when the burner of the dryer is started, it is burned with a set amount of supplied fuel for a certain time, and thereafter, the set hot air temperature and the outside air temperature sensor The burner is burned with a predetermined supply fuel calculated based on the difference between the detected outside air temperature detected by No. 4, and then the set hot air temperature is changed based on the difference between the set hot air temperature and the outside air temperature detected by the outside air temperature sensor. A burner combustion control device in a dryer is characterized in that a control means for burning the burner is provided until that time.

Effect of the Invention When the temperature of hot air generated from the burner is set and combustion control of the burner is started, the set amount of ignition fuel is supplied into the rotationally driven diffusion cylinder 1 for a certain period of time.

The ignition fuel and the combustion air are mixed and vaporized in the diffusion cylinder 1, and the vaporized fuel is ejected and combusted from the ejection port 2 formed between the ejection combustion board 3 and the diffusion cylinder 1 to form a combustion flame. After that, the set hot air temperature and the detected outside air temperature detected by the outside air temperature sensor 4 are compared, and the temperature obtained by calculating from the temperature difference is generated as the hot air temperature from the burner with a constant supply fuel for a predetermined time. The burner is subjected to combustion control, and after the elapse of this predetermined time, the fuel supplied to the burner is controlled so that the set hot air temperature is generated.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has the following technical effects.

That is, a jet combustion board 3 having a diffusion cylinder 1 for inducing and diffusing fuel by rotation and a jet port 2 for jetting and burning vaporized fuel.
In the dryer having the outside air temperature sensor 4 for detecting the outside air temperature and the hot air temperature setting device 51 for setting the hot air temperature, when the burner of the dryer is activated, the fuel is burned for a fixed time with the set amount of the supplied fuel. After that, for a certain period of time, the burner is burned with a predetermined supply fuel calculated based on the difference between the set hot air temperature and the detected outside air temperature detected by the outside air temperature sensor 4, and thereafter, the set hot air temperature and the outside air temperature sensor are detected. Based on the difference with the outside air temperature, the control means is provided to burn the burner until it reaches the set hot air temperature.Therefore, after a certain period of time after the burner is started, the form of combustion control will switch greatly in steps. As a result, the time required to reach the target set hot air temperature is shortened.

Moreover, in the present invention, during the transition from the ignition combustion to the set hot air temperature combustion, the intermediate hot air temperature, in other words, the intermediate hot air temperature located between the ignition hot air temperature and the set hot air temperature, is set. Since the burner combustion control is performed so that the hot air temperature is reached, the time to reach the set hot air temperature is shortened and there is no fear of degrading the quality of the grain. Is not exposed to hot air having a temperature higher than the set hot air temperature, so that the quality of the grain is not deteriorated.

Example In addition, the illustrated example shows the burner (6) used in the dryer (5).
Will be described.

The machine wall (7) of the dryer (5) has a rectangular shape that is long in the front-back direction in a plan view, and is composed of front and rear wall plates and left and right wall plates, and a burner case (in which the burner (6) is installed on the front wall plate ( 8) and an operating device (9) for operating the dryer (5),
An air blower (10) is provided on the rear wall plate, and a grain collecting gutter (11) having a transfer spiral is provided in the center of the lower portion of the machine wall (7) while extending in the front-rear direction. , A drying chamber (13) equipped with a feeding valve (12) in the lower part is installed on the upper side of the grain collecting gutter (11) so as to communicate with each other, and a hot air temperature is provided between the insides of the drying chambers (13) and (13). A hot air chamber (15) provided with a sensor (14) is formed so as to communicate with the burner (6), and the drying chamber (13),
(13) Exhaust chambers (16) and (16) are formed on the outside to communicate with the exhaust fan (10), and the exhaust fan (10) is a motor (17) provided on the rear wall plate. It is configured to be rotationally driven.

A transfer gutter (20) having a storage chamber (18) formed above the drying chambers (13) and (13) and having ceiling plates (19) and (19) and a transfer spiral installed inside the storage chamber (18). A supply port is provided in the center of the transfer gutter (20) for supplying the transfer grains into the storage chamber (18), and a diffusion plate (21) is provided below the supply port.
The front wall board is provided with a window (22), and the window (22) is provided with a numerical value on the side of the window (22) for displaying the stored grain amount.

A grain raising machine (23) is provided in the front part of the front wall plate, and a bucket conveyor (24) belt is stretched between the upper and lower pulleys inside, and between the upper end and the transfer gutter (20) starting end. Is provided with a throw-out tube (25) for communication, and a supply gutter (26) is provided between the lower end and the end of the grain collecting gutter (11) for communication with the motor (27) provided on the upper part. The bucket conveyor (24) belt, the diffusion plate (21), the upper and lower transfer spirals, the feeding valve (12), etc. are rotationally driven, and a moisture sensor (28) is provided in the vertical center. The moisture sensor (28) is provided, and a motor (29) incorporated in the moisture sensor (28) is rotated by transmission of an electrical measurement signal transmitted from the operating device (9), and the moisture sensor (28) is provided. Is configured to rotate and detect the moisture content of the grain.

The burner (6) is mounted on a mounting plate (30) projecting upward from the inner wall of the lower plate of the burner case (8), and the burner (6) has a cylindrical shape with combustion air passing through the rear part thereof. A blower tube (31) having an opening in the center of the wall plate is provided, and a motor (32) for rotationally driving the diffusion tube (1) is provided in the blower tube (31). The wall plate is provided with a combustion tube (33) having an open central portion, and the opening of the combustion tube (33) is provided with a conical guide tube (34) having an open tip, and the combustion tube (33) is provided. Has an ejection hole (35) through which a part of the vaporized fuel is ejected, and an ejection combustion plate (3) having an inclined portion that is opened in the center and inclined inward is provided, and the outer periphery of the combustion cylinder (33) Ignition heater (3
6) and flame sensor (37) to detect the presence or absence of combustion flame
Is provided, and a passage (38) through which vaporized fuel passes is formed between the combustion cylinder (33) and the jet combustion platen (3). The attachment plate (30) is provided with an outside air temperature. This is a configuration in which an outside air temperature sensor (4) for detecting is provided.

At the shaft end of the motor (32), a scatterer (40) for receiving and spattering the fuel jetted from the fuel nozzle (39) and the diffusion cylinder (1) along the guide cylinder (34) are fixed. The diffusion tube (1) has a cup-like shape, the rim is bent toward the outer circumference, the outer peripheral edge (41) is conically expanded, and the other end is a small diameter cylinder. The diffusion cylinder (1) has a vertical portion that connects the vertical portion and the vertical portion, and the vertical portion and the rim portion are fixed to each other with a small gap through which fuel can flow out.
A jet outlet (2) is formed between the enlarged diameter portion of the nozzle and the inclined portion of the jet combustion board (3), and vaporized fuel is jetted from the jet outlet (2), and the vaporized fuel is jetted and burned. Then, it becomes a combustion flame.

A fuel tank (42) is provided at the front of the dryer (5),
A fuel pump (43) having a fuel valve is provided on the outside of the lower plate of the burner case (8), and the fuel is sucked from the fuel tank (42) by opening and closing the fuel valve, and the fuel nozzle (39) and the like. It is configured to be jetted and supplied to the outer peripheral portion of the scatterer (40) through the blower, and the combustion air is rotationally driven by the motor (45) in the blower (44) provided on the outer side of the upper plate of the burner case (8). The suction cylinder (46) communicating with the blower (44) sucks air, and the blower (44) blows air into the blower tube (31) through the blower duct (47).

The operating device (9) has a box shape, and a start switch (48) for performing operations such as starting and stopping the dryer (5), a stop switch (49), and a target finish moisture value on the surface plate of the box body. The target moisture setting depth (50), the hot air temperature setting depth (51) for setting the hot air temperature, and the detection values detected by the hot air temperature sensor (14) and the moisture sensor (28) are displayed alternately. Is provided with a display window (52) for controlling and a control device (53) and a fuel control device (54) are provided inside, and the setting knobs (50) and (51) are rotary switch type. When the setting scoop (50) is operated to the position of the numerical value which is the finishing target of the surface plate, the finishing target moisture value is set, and the set scoop (51) is stored in the storage chamber (18). When the numerical value of the window (22) displaying the quantity is operated to the same position as the numerical value of the surface plate, the hot air temperature is A constant Configurations.

The control device (53) has an A-D converter (55) for A-D converting the detection value detected by the moisture sensor (28), and the conversion value converted by the A-D converter (55). An input circuit (56) to be input, an input circuit (57) to which the operation of each of the switches (48) and (49) and the setting knob (50) is input, and each of these input circuits (56) and (57) A CPU (58) for performing various arithmetic and logical operations and comparison operations on various input values input from the CPU (58) and an output circuit (59) for receiving and outputting various commands instructed by the CPU (58) are provided.

The fuel control device (54) has an A-D converter (60) for A-D converting the detection values detected by the outside air temperature sensor (4), the hot air temperature sensor (14) and the flame sensor (37), An input circuit (61) to which the converted value converted by the AD converter (60) is input, an input circuit (62) to which the operation of the setting knob (51) is input, and these input circuits (6)
1), the CPU (58) for performing arithmetic logic operation and comparison operation on various input values input from (62), and an output circuit (63) for receiving and outputting various commands instructed by the CPU (58). This is the configuration provided.

The fuel control device (54) inputs the operation of the setting switch (50) and the start switch (48) to the control device (53), and the setting switch (51) is input to the fuel control device (55).
Is input, the dryer (5) is started and at the same time, the burner (6) and the moisture sensor (28)
Is started, the fuel valve of the fuel pump (43) is opened and closed a predetermined number of times for a fixed time set and stored in the CPU (58), and the fuel is sucked and supplied by the fuel pump (43). The burner (6) ignites and burns, and after the elapse of a predetermined time, the outside air temperature sensor (4) detects the outside air temperature, and when the detected outside air temperature is input, the input outside air temperature and the set hot air temperature are Are calculated, the temperature difference is calculated, and the temperature difference is calculated for each calculated temperature so as to become the calculated temperature obtained by this calculation.
The supplied fuel amount set and stored in the CPU (58) is supplied from the fuel pump (43) for a certain period of time, and after this certain period of time, the hot air temperature sensor (14) detects the hot air temperature. The temperature is compared with the set hot air temperature set by operating the setting knob (51), and if there is a difference, the temperature of the fuel valve of the fuel pump (43) is adjusted to the same temperature as the set hot air temperature. The number of opening / closing operations is controlled to change the amount of fuel sucked by the fuel pump (43), and the amount of combustion air blown by the blower (44) is controlled by the amount of fuel sucked.

Further, when the moisture sensor (28) detects the same grain moisture value as the finishing target moisture value set by operating the setting scoop (50), the control device (53) automatically drives the dryer (5). It is a configuration to stop.

When controlling the amount of fuel supplied by the fuel pump (43) to be larger than the amount of ignition fuel, the fuel is supplied so that the increase control of the amount of combustion air blown by the blower (44) is delayed for a predetermined time. When controlling by the control device (54), or conversely to controlling to a side smaller than the ignition fuel amount, the fuel control device (54) controls the reduction control of the combustion air amount so as to be advanced by a predetermined time. When the fuel amount is controlled to a side larger than the ignition fuel amount, the increase in the combustion air amount is controlled to be delayed from the increase in the fuel amount so that both the fuel and the combustion air that rapidly increase at the same time are controlled. The diffusion cylinder (1) is cooled by this, the vaporization of the fuel is deteriorated by this cooling, the red flame combustion in which the burner (6) burns red flame can be prevented, and the fuel amount is reduced to the side smaller than the ignition fuel amount. Control Occasionally, by controlling the decrease in the amount of combustion air faster than the decrease in the amount of fuel, the diffusion cylinder (1) is overheated by the fuel and the combustion air that are rapidly and simultaneously decreased, and this overheated state is set. The fuel flowing down inside the diffuser cylinder (1) has become a drop of oil from the inner wall of the diffuser (1), and the burner (6) burns red fire by this drop of oil to prevent this red fire combustion. it can.

By operating the setting knobs (50) and (51) of the operating device (9) to predetermined positions and operating the start switch (48), the dryer (5) is started at the same time as the burner (6) and The moisture sensor (28) is started and the ignition heater (36) of the burner (6) is energized, the ignition heater (36) becomes red hot, and the ignition fuel is fed from the fuel tank (42) to the fuel pump (4).
3), it is jetted and supplied to the outer periphery of the scatterer (40) through the fuel nozzle (39), and this fuel is scattered by the scatterer (40) to the inner wall of the diffusion cylinder (1), and this diffusion cylinder (1) While the inner wall is flowing down, it is jetted from the small gap portion of the vertical portion of the diffusion cylinder (1), and a part of the jetted fuel is scattered to the ignition heater (36) which is red-hot, and it is automatically ignited to start combustion. .

This combustion heats the diffusion cylinder (1), vaporizes the fuel flowing down in the diffusion cylinder (1), and mixes the vaporized fuel with combustion air blown by the blower (44). The jet flame is emitted from two places, the jet port (2) and the jet hole (35), to form a combustion flame, and the combustion flame becomes hot air.

For a certain period of time from the start of combustion, the ignition fuel is supplied and burns, and when this ignition combustion time elapses, the detected outside air temperature detected by the outside air temperature sensor (4) and the set throttle (5
1) is operated to compare with the set hot air temperature, the temperature difference is calculated, and the fuel is burned for a predetermined time so as to maintain the calculated temperature obtained by this calculation, and after this predetermined time has elapsed The fuel is supplied and burned so that the temperature is maintained at the set temperature set by the set scoop (51).

When this hot air is sucked by the air exhauster (10), it is ventilated from the hot air chamber (15) through the drying chamber (13), and is then sucked and exhausted by the air exhauster (10) through the air exhaust chamber (16), and the drying is performed. The grain stored in the storage chamber (18) of the machine (5) is exposed to the hot air and dried while flowing down from the storage chamber (18) in the drying chamber (13), and the feeding valve (12). ) To the lower part, and the lower transfer spiral passes through the grain collecting gutter (11) and the supply gutter (26), and then the grain raising machine (2
3) It is transferred and fed into the inside, is conveyed to the upper part by the bucket conveyor (24), is supplied into the transfer gutter (20) through the throw-out cylinder (25), and is passed through this transfer gutter (20) by the upper transfer spiral. It is transferred and supplied to the diffusion plate (21), is uniformly diffused and reduced in the storage chamber (18) by the diffusion plate (21), is circulated and dried, and has the finishing target moisture value set by the setting scoop (50). When the moisture value of the same grain is detected by the moisture sensor (28), the controller (53) of the operating device (9) automatically controls the dryer (5) to stop automatically.

In the previous stage of shifting from the ignition combustion to the set hot air temperature set by operating the set scoop (51), the difference between the set hot air temperature and the outside air temperature is calculated, and the burner (6) is operated at this calculated temperature. By burning the burner (6), the transition to the set hot air temperature becomes easy.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a block diagram, FIG. 2 is a flow chart diagram, FIG. 3 is an enlarged side sectional view, FIG. 4 is an enlarged front view, and FIG. Partial cross-sectional side view of the dryer, FIG. 6 is a partial cross-sectional front view of the dryer, FIG. 7 is an enlarged front view of part of the dryer, and FIG. 8 is a burner combustion-related diagram. . In the figure, reference numeral (1) is a diffusion cylinder, (2) is an ejection port, (3) is an ejection combustion board, and (4) is an outside air temperature sensor.

Claims (1)

(57) [Claims] 1. A diffusion cylinder 1 for inducing and diffusing fuel by rotation.
An ejection combustion board 3 having an ejection port 2 for ejecting and burning vaporized fuel; an outside air temperature sensor 4 for detecting an outside air temperature;
In a dryer having a hot air temperature setting device 51 for setting the hot air temperature, when the burner of the dryer is started, it is burned with a set amount of supplied fuel for a certain time, and thereafter, the set hot air temperature and the outside air temperature sensor The burner is burned with a predetermined supply fuel calculated based on the difference between the detected outside air temperature detected by No. 4, and then the set hot air temperature is changed based on the difference between the set hot air temperature and the outside air temperature detected by the outside air temperature sensor. A burner combustion control device in a dryer, characterized in that a control means for burning the burner until that time is provided.