JPS62724A - Air controlling device to burner - Google Patents

Abstract

PURPOSE:To obtain a stabilized combustion on a burner without regard to the atmospheric temperature, by providing a feed-air temperature sensor which detects the temperature in feed air in a drying chamber, in order to correct and to control the rate of feeding air in a feed air chamber. CONSTITUTION:Hot air for drying of grain is sucked by an exhaust air blower 9, passing through a hot air chamber 16 and a drying chamber 11. The grain from a storage bin 10 is dried, being exposed to the drying hot air while it is falling down through the drying chamber 11, fed downward through a feeder valve 12, and is dispersed uniformly in a storage bin 10 by a transmitting means. A controller automatically stops a dryer 4 when the water content in the grain gets to a specified value and a predetermined time has passed. During a drying operation, a feed-air temperature sensor 3 detects the temperature in hot air. The rate of feed air is controlled by the detected feed-air temperature, the atmospheric temperature being detected by an atmospheric temperature sensor 48, and the fuel feeding rate. Being controlled in such a manner, the fed fuel can be burned in the stabilized state on a burner 7 in a combustion chamber 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an air control device for controlling the supply of combustion air to a burner, and can be used in burners such as dryers for drying grains.

Conventional technology In the past, the flow rate of fuel supplied to the combustion section for combustion was determined by
This is a device that sucks the heated air heated in the combustion section with a blower, controls the amount of this suction, and controls the amount of air sent to the combustion section through the ventilation chamber. The device did not detect temperature and correct the amount of air supplied.

Problems to be Solved by the Invention When a burner is used in a dryer for drying grain, fuel is blown out from the combustion part of the burner provided at the front of the dryer to the front, and this combustion An exhaust system installed at the rear of the dryer to remove the flame and the outside air passing through the burner! By sucking in the L machine, this hot air is passed through the drying chamber, and the grains flowing down in the drying chamber are exposed to this hot air and dried. During this drying work, the combustion section of the burner The flow rate of the fuel to be burned varies depending on the type of grain to be dried, the amount of grain to be dried, the outside temperature detected by the outside temperature detection sensor, etc., and depending on the supplied fuel flow rate, the heated air heated in the combustion section is transferred to the blower. The suction amount is controlled to control the amount of air sent to the combustion section via the ventilation chamber, but the temperature of the air sucked and sent to the combustion section is not detected, so for example, the outside air temperature When the fuel flow rate is low and the fuel is burned at a low temperature, the temperature of the air sucked and sent by the X blower becomes low, so the supplied fuel is cooled by this air flow and the vaporization of the fuel becomes poor. , poor combustion may occur, or contrary to the above, when the outside air temperature is high and the amount of fuel to be combusted is large, the temperature of the air sucked and blown by the blower becomes high. This air flow may cause the supplied fuel to become too warm, resulting in poor combustion.

Means for Solving the Problems This invention provides an air supply chamber (2) that sucks in part of the heated air from the combustion section (1) and supplies the air to the combustion section (1). 2) The burner air control device is provided with an air supply temperature detection sensor (3) for detecting the air supply temperature for correcting and controlling the air supply amount.

Effect of the Invention The fuel supplied from the fuel pump and a part of the heated air heated by the combustion section (1) are controlled to be blown @-C to be sucked into the combustion section (1) through the air supply chamber (2). The air supply amount adapted to the supplied fuel flow rate is controlled and supplied as combustion air, and the combustion air is ejected and combusted while jetting the fuel forward from the combustion section (1), and the combustion flame and the burner section are The hot air for drying is created by the outside air passing through the surrounding area, and this hot air for drying passes through the drying chamber, and the grains flowing down the drying chamber are exposed to this hot air for drying. During combustion, the flow rate of fuel supplied from the fuel pump changes due to changes in outside air temperature, and at the same time, the amount of air sucked by the blower and sent into the air supply chamber (2) changes depending on this fuel flow rate. An air temperature detection sensor (3) provided in the air chamber (2) detects the temperature of the air to be blown, and controls the amount of air to be blown based on this detected air temperature. The supplied fuel is then combusted in the combustion section of the burner.

When the supplied fuel amount is below a predetermined amount, the outside air temperature is below a predetermined temperature, and the detected air supply temperature is below a predetermined temperature, the air supply amount is controlled to decrease from the predetermined air supply amount to It burns in the combustion section.

Contrary to the above, when the supplied fuel is above the predetermined amount, the outside air temperature is above the predetermined temperature, and the air supply temperature is above the predetermined temperature, this air supply amount is lower than the predetermined air supply amount. The combustion is performed in the combustion section of the burner in an incrementally controlled manner.

Effects of the Invention According to the present invention, the air supply temperature is detected, and the air supply amount is corrected and controlled based on the detected air supply temperature, so that when the outside air temperature is low and the fuel flow rate is small, the air supply amount is Since the supplied fuel is controlled to decrease, it will not be cooled, and when the outside air temperature is high and the fuel flow rate is large, the air supply amount is controlled to increase, so that the supplied fuel will not become too warm. The burner always burns in a stable state.

Embodiment In the illustrated example, the machine wall (5) of the dryer (4) consists of front and rear wall plates and left and right wall plates, and a burner case (6) is provided on this front wall plate. ) has a built-in burner (7) and an operating device (8) for starting, stopping, etc. the dryer (4), and the rear wall plate of the machine wall (5) An exhaust fan (9) is provided at the rear wall plate, and a motor (20) is provided at the lower part of the rear wall plate.

The upper part of the machine wall (5) has a storage chamber (1O) for storing grains.
At the bottom of this storage chamber (10), there are two drying chambers (11) arranged side by side through which the grains flow.
At the bottom, there is a feeding valve (12) that feeds out the grains and lets them flow down.
(12), a grain collection gutter (13) equipped with a transfer helix is provided at the bottom of the feed valve (12), (12), and a transfer gutter (13) equipped with a transfer helix is installed above the storage chamber (10).
14), and a diffusion plate (15) is provided at the lower center of the transfer gutter (14), and this diffusion plate (15) is configured to uniformly diffuse and return the transferred grains into the storage chamber (10). be. A hot air chamber (1B) is provided between the drying chambers (2), (2), and the hot air chamber (16) and the burner (7) are in communication with each other. 2) and the left and right wall plates are provided with ventilation chambers (17), (17).
), (17) and the exhaust fan (9) are configured to communicate with each other, and a hot air temperature detection sensor (18) is installed in the hot air chamber (1B) to detect the hot air temperature in the hot air chamber (16). established,
a transfer helix in the grain collecting trough (13) by the motor (20);
It is configured to rotationally drive the delivery valves (12), (12), the exhaust fan (9), etc.

A grain raising machine (19) is attached to the front part of the m wall (5), a packet conveyor is provided inside, and the upper end and the transfer gutter (1
0 starting end for communication, and a supply gutter for communication between the lower end and the terminal end of the grain hoist (13). (19) At the top is the motor (
21), and this motor (21) rotates the packet conveyor belt and the transfer spiral in the transfer gutter (14).

The burner (7) has a combustion section (1) at the front and an air supply chamber (2) at the rear. This burner (7) is installed on top of the burner (7).
) and outside air passing around the burner (7) are sucked by the exhaust fan (9) to become drying hot air, and this drying hot air is ventilated through the drying room (11),
The grains flowing down the drying chamber (11) are exposed to this drying hot air and dried.

The air supply chamber (2) is cylindrical and open at the center for supplying combustion air, and the temperature of the air passing through the air supply chamber (2) is detected in the air supply chamber (2). Air supply temperature detection sensor (
3), and a motor (24) for rotationally driving the carburetor tube (23) etc. is fixed, and a combustion tube (25) with an open center is fixed to the front part of the air supply chamber (2). A conical guide tube (26) with an open tip is fixed to the opening, and the outside of this guide tube (26) has a nozzle hole (27) that is open in the center and through which vaporized fuel is ejected and burned. A disk (28) is fixed to the combustion tube (25), and an ignition heater (29) is provided near the outer periphery of the combustion tube (25).

A scattering body (31) for receiving and rotating fuel supplied from a fuel nozzle (30) and the vaporizing cylinder (23) are fixed to the shaft end of the motor (20). The vaporizing plate (32) is fixed with a small gap through which the fuel can flow out, and the leading edge of the vaporizing Ml (32) is diagonally expanded forward and outward, and this enlarged diameter part and the combustion A jet nozzle (33) is formed between the combustion disc (28) and the combustion disc (28), and the vaporized fuel is spouted and combusted from the jet nozzle (32) and the nozzle hole (27) of the combustion disc (28). be.

A blower (34) is installed on the outer side of the upper plate of the burner case (6).
and a blower motor (35), and this blower fi (3
An intake cylinder (3B) is provided to protrude into the burner case (6) from part 4), and the intake cylinder (3B) and the blower (34) are communicated with each other, and the blower (34) and the vaporization chamber are connected to each other. There is a ventilation duct between the opening in the center of (2) (3)
7), the heated air ejected from the combustion section (1) is sucked in from the intake port (38) of the intake cylinder (3B), and the air duct (37) is introduced from the air blower m (34). This heated air is then sent into the air supply chamber (2), and the amount of air sent is changed by the rotation of the blower motor (35).

A fuel pump (39) is provided on the outer side of the lower plate of the burner case (6), and a fuel hose (41), the fuel pump (39), and a fuel supply pipe are provided at the front of the dryer (4). (42) and the fuel nozzle (30) to supply fuel to the outer peripheral portion of the scattering body (31).

The operating device (8) is box-shaped, and the surface of the box has a start switch (43), a stop switch (44), a hot air temperature setting hole (45), and a grain type setting hole (4B).
, a time setting notch (47), etc., an outside temperature detection sensor (4 days) for detecting outside air temperature is installed on the outside of the bottom plate, and a control device (49) is installed inside. The device (49) includes an input circuit (50) into which the operations of the switches (43), (40 and the setting switches (45), (46), (47), etc. are input), and the air supply temperature detection sensor. (3), an A-D converter (51) that converts the detection values detected by the hot air temperature detection sensor (1st day) and the outside temperature detection sensor (4th day) into A-D; this A-D converter ( 51)
an input circuit (50) into which the converted value is input;
It is configured to have an output circuit (53) that calculates various input values input from these input circuits (50) and (50), receives various commands from this CPU (52), and outputs them, and this control device (48) and said ignition heater (29)
, the fuel pump (38) and each motor (20),
This is a configuration in which starting and stopping controls such as (21), (24), and (35) are performed.

The control device (49) supplies fuel into the burner (7) so that the hot air temperature is set by operating the grain type setting hole (4B) and the hot air temperature setting hole (45). The fuel pump (39) is configured to control the fuel pump (39), and when the outside air temperature detected by the outside air temperature detection sensor (48) changes to a high temperature, this set hot air temperature is set in the control device (49). When the set hot air temperature is set in the control device (49) and the stored temperature amount is increased, and the temperature changes to a low temperature, the set hot air temperature is set in the control device (49) and the stored temperature amount is decreased. ) is detected by the hot air temperature detection sensor (18), and this detected hot air temperature is compared with the set hot air temperature by this control device (49), and this detected hot air temperature is determined as the set hot air temperature. The fuel pump (39) is controlled so that the temperature is the same as that of the fuel pump (39).

The control device (49) controls the rotation of the blower motor (35) according to the set hot air temperature so that the rotation speed is set and stored in the control device (49). The heated air heated in the combustion section (1) is sucked through the intake port (38) and sent into the air supply chamber (2), and the fuel pump (3B) supplies fuel; a set fuel amount in which the outside air temperature detected by the outside air temperature detection sensor (4B) and the air supply temperature detected by the air supply temperature detection sensor (3) are set and stored in the control device (48); When the set outside air temperature and the set air supply temperature are both below the detected value, this control device (48)
The control device (48) is configured to reduce the rotational speed set and stored in the air supply chamber (2), and control the amount of air sent into the air supply chamber (2) to decrease. On the other hand, when the set fuel amount, set outside air temperature, and set air temperature that are set and stored in the controller (49) are all higher than the detected values, the rotational speed that is set and stored in the control device (49) is increased. The control device (4θ) controls the increase in the amount of air sent into the air supply chamber (2).

Each setting of the operating device (8) (45), (4B), (4
7) and the start switch (43), the dryer (4) starts and at the same time the burner (7)
The ignition heater (2θ) is energized, and the ignition heater (2θ) is energized.
9) becomes red hot, and the fuel flows through the fuel tank (40), fuel hose (41), fuel pump (39), and fuel supply pipe (42).
) and the fuel nozzle (30) to the outer circumferential surface of the scattering body (31), and this scattering body (31) supplies the fuel to the vaporization tube (2).
3) The fuel is scattered to the inner wall, and while flowing down the inner wall of this vaporizer cylinder (23), fuel is ejected from the small gap between this vaporizer cylinder (23) and the vaporizer plate (32), and a part of this ejected fuel becomes red-hot. The fuel scatters to the ignition heater (23) and automatically ignites, starting the fuel.
Further, combustion air is taken in through the intake port (38) of the intake cylinder (36) and sent into the air supply chamber (2) through the blower (34) and the ventilation duct (37). This combustion flame causes the vaporization tube (23
) is heated, the fuel flowing down in this vaporization tube (23) is vaporized, and this vaporized fuel is heated to the combustion plate (28) of the combustion section (1).
) is ejected from the nozzle (27) and nozzle (32) and burns to become a combustion flame.

This combustion flame and the outside air passing around the burner (7) become drying hot air, and this drying hot air is
) is sucked in by the exhaust air m (9) provided on the rear wall plate part, and is ventilated from the hot air chamber (16) to the drying chamber (11), and then to the storage chamber (10).
The grains flowing down in the drying chamber (11) are dried by being exposed to this drying hot air, and are delivered to the lower part by the delivery valve (12), and sent to the grain collecting trough (13) by the lower transfer spiral. The grains are transferred and discharged into the supply trough, conveyed to the upper part by the hoisting machine (13), and passed through the transfer trough (14) by the upper transfer spiral to the spreading plate (1).
5) The grains are transferred and supplied to the top, are evenly diffused and returned to the storage chamber (10) by this diffusion plate (15), and are circulated and dried until the grains reach a specified moisture content and are then sent to the time setting chamber (47). When the set time has elapsed, the control device (48) of the operating device (8)
) to automatically stop the dryer (4), but during this drying operation, the air temperature detection sensor (3) monitors the temperature of the heated air sucked and sent by the blower (34). The amount of air to be sent is controlled by the detected outside air temperature detected by the outside air temperature detection sensor (48), and the amount of fuel supplied to the combustion section (1) of the burner (7). )
The supplied fuel is combusted.

Since the amount of air sucked and sent by the blower (30) is controlled by the air temperature, the outside air temperature, and the amount of fuel supplied,
Regardless of whether the outside air temperature is low or high, the burner (7
) always burns in a stable state.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is an enlarged side sectional view, Fig. 3 is an enlarged rear view,
FIG. 4 is a partially cutaway front view of the dryer, and FIG. 5 is an enlarged front view of a portion of the dryer. In the figure, reference numeral (1) indicates a combustion section, (2) indicates an air blowing chamber, and (3) indicates a sent air temperature detection sensor.

Claims (1)

[Claims] This air supply chamber (2) is provided in an air supply chamber (2) that sucks in part of the air heated by the combustion section (1) and supplies the air to the combustion section (1).
) A burner air control device is provided with an air supply temperature detection sensor (3) for detecting the air supply temperature for correcting and controlling the air supply amount within ).