JPH0723767B2 - Combustion device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a combustion device.

More specifically, the present invention relates to the improvement of the structure around the rostrur relating to the combustion efficiency and the like in a combustion device which is attached to a heat exchange mechanism such as heating using a solid fuel composed of lime, industrial waste pellets, etc. as a fuel source.

[Prior Art] Conventionally, as a combustion device of this type, for example, a temperature sensor for detecting a combustion temperature or the like is provided, and a fuel supply mechanism is operated at any time based on a comparison between a temperature detected by the controller and a set temperature. It is known that the combustion state is automatically controlled by stopping and intermittently supplying the solid fuel.

[Problems to be Solved by the Invention] In the above-described conventional combustion apparatus, when combustion takes a long time, combustion ash formed by the combustion of solid fuel is deposited on the rostr, and further, on the deposited combustion ash. Since solid fuel is supplied from the fuel supply unit located at a fixed position,
Since the fuel and the combustion ash are compressed and laminated to reduce the flowability of the combustion air and inhibit the combustion, there is a problem that the effective control of the combustion state becomes impossible.

Furthermore, since the combustion does not rise and fall immediately due to the nature of the solid fuel and the responsiveness of the combustion state is low, the control effect is delayed by the control simply by the intermittent operation of the fuel supply mechanism, so that effective control cannot be performed. Have a point.

The present invention has been made to solve such problems, and an object thereof is to provide a combustion device capable of sharply controlling the combustion state for a long time.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the combustion apparatus according to the present invention is
The following means are adopted.

That is, according to the first aspect of the present invention, a combustion apparatus in which a fuel supply unit for supplying solid fuel from a fixed position is provided above a rostrut installed substantially horizontally in the combustion chamber, and a combustion ash drop space is formed below In, a rostrul is formed in a disk shape with a permeable groove, is rotatably installed substantially horizontally, and an actuator that rotates the rostrut, and a fuel supply mechanism that is connected to the fuel supply part and sends solid fuel to the fuel supply part. , A mechanism consisting of an ash extraction mechanism that is installed in the combustion ash drop space and discharges the combustion ash into a sensor consisting of a high temperature sensor that detects the high temperature limit and a temperature setting sensor that detects the set temperature via the controller. Coordinatedly, the controller is set to switch between normal operation and limited operation depending on at least the operating time of the fuel supply mechanism. All the mechanisms are stopped, and only the fuel supply mechanism is operated in a limited range so that the combustion of solid fuel does not stop in the temperature range between the high temperature limit and the set temperature, and the fuel supply mechanism is limited to the set temperature. In the temperature range, the fuel supply mechanism is normally operated so that the solid fuel normally burns, and along with this, the actuator controls the operation of the ash extraction mechanism by rotating the roster.

According to a second aspect of the present invention, in the combustion apparatus of the first aspect, the mechanisms are provided with an ignition burner for igniting solid fuel, and when the controller exceeds a high temperature limit and falls to a temperature range below a set temperature, It is characterized in that a reset circuit is set to cause the mechanisms to perform the driving operation in a temperature range below the set temperature and further to operate the ignition burner.

[Operation] According to the above-mentioned means, in claim 1, the mechanism including the fuel supply mechanism in each of the three stages of the temperature range exceeding the high temperature limit, the high temperature limit, the temperature range between the set temperatures and the temperature range below the set temperature. Since the combustion state is controlled by operating and stopping the fuel cells and the fuel supply mechanism can be controlled in two stages of operation state, it is possible to eliminate and correct the low responsiveness of the combustion state of the solid fuel. Therefore, it becomes possible to sharply control the combustion state.

Also, in the combustion in a temperature range below the set temperature at which combustion ash is most likely to be formed, the rostrut rotates and shakes the combustion ash accumulated on the rostrul into the falling space below the rostrum,
Furthermore, since the combustion ash that has been dropped is discharged by the ash extraction mechanism, there is no possibility that the rust will be blocked by the combustion ash and the flowability of the combustion air will not deteriorate, and therefore the combustion state can be controlled for a long time. Become.

Therefore, the object of providing a combustion device capable of sharply controlling the combustion state for a long time is achieved.

Further, in claim 2, since all the mechanisms stopped in the temperature range exceeding the high temperature limit are reset, the continuous operation of the device under the effective control of claim 1 is performed.

[Embodiment] An embodiment of a combustion apparatus according to the present invention will be described below with reference to the drawings.

In this embodiment, as shown in FIG. 1, a combustion chamber 2 surrounded by a cylindrical combustion cylinder 1 is shown.

In this embodiment, a grate 3 is installed in the combustion chamber 2 substantially in the center thereof in a horizontal or slightly inclined manner. This roster 3
Has a disk shape and is rotatable on its installation surface, and is provided with a large number of through grooves 3'communicating the upper and lower surfaces thereof. A fuel supply unit 4 to which solid fuel is supplied is fixed above the grate 3, and the grate 3
In the lower part of, a drop space 5 is formed so that the combustion ash can drop from the through groove 3 ′ of the grate 3.

Furthermore, around this roster 3, there are mechanisms 6 and sensors 7.
Are installed, and these mechanisms 6 and sensors 7 are linked via a controller 8.

The mechanism 6 includes an actuator 61 such as a motor that rotates the roster 3, and a fuel supply mechanism 62 such as a spring conveyor that sends solid fuel from a fuel bucket or the like to the fuel supply unit 4.
And an ignition burner 63 that is installed in the combustion cylinder 1 above the roster 3 so as to be inwardly directed to the combustion chamber 2 and ignites solid fuel, and combustion ash and discharge ash that is installed below the falling space 5 to the outside of the combustion cylinder 1. And a ashing mechanism 64 such as a screw conveyor.

The sensors include a high temperature sensor 71 that selectively detects the high temperature limit of the temperature in the combustion chamber 2 as YES and NO, and a set temperature that is set as a suitable temperature in the combustion chamber 2 as YES and NO. Temperature setting sensor 72 and an ignition confirmation sensor that selectively detects YES and NO confirmation of ignition of solid fuel by the ignition burner 63.
It consists of 73 and.

The controller 8 has a built-in microprocessor, and the control shown in FIG. 2 is set.

That is, the operation switch connected to the controller 8
When turned on, first, the fuel supply mechanism 62 is operated for a long time (for example,
The operation operation (normal operation) is performed for 10 seconds, and the solid fuel is deposited on the roster 3 via the fuel supply unit 4. Next, the ignition burner 63 operates to ignite the solid fuel accumulated on the roster 3, and further confirms this ignition with the ignition confirmation sensor 73, and if it is not ignited, re-ignites. After that, the normal operation of the fuel supply mechanism 62 is performed again, and the solid fuel is replenished onto the roster 3. After this (for example, after 3 seconds)
Then, the actuator 61 is operated to rotate the roster 3 by a certain angle (for example, 90 degrees), and the normal operation of the fuel supply mechanism 62 is repeated, and the normal combustion operation is performed. If the combustion ash is accumulated in the falling space 5 to some extent during this repetition, the ash extraction mechanism 64 is operated to discharge the combustion ash.

During such operation control, when the high temperature sensor 71 sends a NO signal indicating that the inside of the combustion chamber 2 has reached the high temperature limit,
All of the mechanisms 6 are stopped immediately or after completing their operation. Then, when the solid fuel is extinguished and the temperature setting sensor issues a YES signal indicating that the temperature inside the combustion chamber 2 has dropped below the set temperature, the same control as when the operation switch is turned on is restarted.

Further, during such operation control, conversely, when the high temperature sensor 71 sends out a YES signal indicating that the inside of the combustion chamber 2 has fallen below the high temperature limit, if the temperature setting sensor 72 sends out a YES signal, The control (control after the ignition confirmation sensor 73) when the operation switch of is turned ON is continued, but the temperature setting sensor 72 indicates that the inside of the combustion chamber 2 is higher than the set temperature.
If the signal is transmitted, the fuel supply mechanism 62 is operated for a short time (for example, a few seconds) (restricted operation) over a long time interval, and the rotation of the roster 3 is stopped.
The combustion operation of the pilot fire is performed to the extent that the solid fuel does not extinguish. Then, when the temperature setting sensor 72 transmits the YES signal, the control (the control after the ignition confirmation sensor 73) when the operation switch is turned on is restarted.

According to such an embodiment, the mechanism 6 including the fuel supply mechanism 61 is operated in three stages of the temperature range exceeding the high temperature limit, the high temperature limit, the temperature range between the set temperatures and the temperature range below the set temperature. , Stop and control the combustion state, enable the fuel supply mechanism 61 to operate in two stages, and immediately return to the normal combustion state when the set temperature drops when the set temperature rises. If the pilot fire remains so that the set temperature rises significantly, the pilot fire is also extinguished because there is a margin in the normal combustion state when the preset temperature drops. Therefore, the low responsiveness of the combustion state of the solid fuel is corrected and corrected, and the combustion state can be sharply controlled.

Further, in the combustion in a temperature range less than the set temperature at which combustion ash is most likely to be formed, the roast 3 is rotated by the actuator 61 and the combustion ash accumulated on the rost 3 is sprinkled to the falling space 5 below the rostr 3. Since the combustion ash dropped and further dropped is discharged by the ash extraction mechanism 64, the roast 3 is not blocked by the combustion ash and the flowability of the combustion air is not reduced. In this way, the combustion state can be controlled for a long time.

As described above, in addition to the illustrated embodiment, the sensors 7 are
For example, the high temperature sensor 71 and the temperature setting sensor 72 may be an embodiment in which they are detected on the heat exchanging mechanism side to which this combustion device is attached or on the heat receiving side via the heat exchanging mechanism (for example, the room temperature of indoor heating). It is possible. In such an embodiment,
It is necessary to provide a sensor or the like that protects the combustion chamber 2 from abnormally high temperatures.

Further, the high temperature sensor 71 and the set temperature sensor 72 may be an embodiment in which a mechanism for selectively detecting the rise and the lower limit of the temperature range of YES and NO respectively is shared.

EFFECTS OF THE INVENTION As described above, the combustion device according to the present invention is
The combustion state is controlled by operating and stopping the mechanisms including the fuel supply mechanism in the three-stage temperature range, respectively, and the operating state of the fuel supply mechanism is controlled in two stages to reduce the responsiveness of the combustion state of the solid fuel. Since the correction is made to eliminate the problem, there is an effect that the combustion state can be sharply controlled.

Furthermore, in combustion in the temperature range where combustion ash is most likely to be formed, the rust rotates and scrapes off the ash accumulated on the rust, and discharges it by the ash extraction mechanism. Since the flowability does not decrease, the combustion state can be controlled for a long time.

Further, since the supply position of the solid fuel on the rostrur is changed by the rotation of the rostrut, the stacking of the solid fuel on the rostrur is equalized, so that combustion unevenness does not occur and the combustion effect is good. There is.

Further, in the second aspect, in addition to the effect of the first aspect, all the stopped mechanisms are restored, so that the continuous operation of the device under the effective control of the first aspect becomes possible. effective.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a combustion apparatus according to the present invention,
FIG. 2 is a flowchart of the control shown in FIG. 2 ... Combustion chamber 3 ... Rostrul 3 '... Through groove 4 ... Fuel supply part 5 ... Falling space 6 ... Mechanisms 61 ... Actuator 62 ... Fuel supply mechanism 63 ... Ignition burner 64 ... Ash Feeding mechanism 7 …… Sensors 71 …… High temperature sensor 72 …… Set temperature sensor

Claims (2)

[Claims] 1. A combustion apparatus in which a fuel supply section for supplying solid fuel from a fixed position is provided above a rostrut installed substantially horizontally in a combustion chamber, and a falling space for combustion ash is formed below the roastor. An actuator that rotates the rostrut in a disk shape with a permeable groove and is installed on a substantially horizontal surface to rotate the rostrut, a fuel supply mechanism that is connected to the fuel supply unit and sends solid fuel to the fuel supply unit, and a combustion A mechanism consisting of an ash extraction mechanism that is installed in the ash drop space and discharges combustion ash is linked via a controller to sensors that consist of a high temperature sensor that detects the high temperature limit and a temperature setting sensor that detects the set temperature. The controller should be set to switch between normal operation and limited operation depending on at least the length of the operating time of the fuel supply mechanism. S was stopped, hot limit, restrict driving only the fuel supply mechanism to allow the degree of pilot flame burning combustion of solid fuel is not stopped in a temperature range between the set temperature,
In the temperature range below the set temperature, the fuel supply mechanism is normally operated so that the solid fuel normally burns, and along with this, the actuator controls the operation of the ash extraction mechanism by rotating the roster. Combustion device. 2. The combustion apparatus according to claim 1, wherein the mechanism is provided with an ignition burner for igniting solid fuel, and the controller is controlled when the temperature falls below a set temperature after exceeding a high temperature limit. A combustion circuit is characterized in that a reset circuit for setting the above-mentioned operation in a temperature range less than a set temperature and further operating an ignition burner is set.