JPH06341623A - Combustion device - Google Patents

Abstract

PURPOSE:To stably supply air independently of the chattering of an air pressure switch by a method wherein an air blower is energized for a predetermined time when an electric source switch is turned on the is controlled according to the air pressure after the lapse of a predetermined time from the time when the air pressure switch does not sense an air pressure of a predetermined value or larger. CONSTITUTION:When an electric source switch 36 is depressed, an on-timer TA starts timing and voltage is applied to a motor M of an air blower 31 and a smoke burn-off burner 23. Following this, when the on-timer TA terminates the timing of a first predetermined time and the amount of the air from the air blower 31 is reduced or becomes zero, an air pressure switch 32 does not sense an air pressure of a predetermined value or larger and an off-timer TB starts timing. When the air pressure switch 32 does not again sense an air pressure of a predetermined value or larger during a second predetermined time of the off-timer TB, the moter M of the air blower 31 and the smoke burn-off burner 23 are deenergized. Also, when the air pressure switch 21 senses again an air pressure of a predetermined value or larger until the timing of the second predetermined time is terminated, the moter M of the air blower 31 and the smoke burn-off burner 23 remain engaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incinerator for general garbage, plastics, urethane foam and the like.

[0002]

2. Description of the Related Art A conventional incinerator is, for example, Japanese Patent Laid-Open No. 63-
As seen in Japanese Patent No. 6318, the combustion flame of a burner arranged toward the combustion chamber is applied to the incineration object to be incinerated.
Exhaust smoke generated by the combustion of the incineration object is secondarily combusted by the smoke extinguishing burner, and the combusted exhaust gas is pressure-fed by a blower equipped with a wind pressure switch and is discharged into the outside air through the chimney. The air is pressure-fed to the secondary-burned smoke, but a large amount of air is required to suppress the temperature rise of the inner wall of the smoke eliminating chamber. Therefore, the blower is provided with a wind pressure switch that stops the energization of the blower unless it detects a wind pressure equal to or higher than a predetermined value, that is, the amount of compressed air.

[0003]

However, in the above-mentioned device, the wind pressure pumped by the blower is unstable when the blower starts up (immediately after the power is turned on), and therefore the wind pressure switch chatters (contacts are turned on and off). Easy to repeat several times). Even when the blower is operating stably, the air pressure switch often chatters due to fluctuations in air pressure inside the device, for example, when the service window inside the device is opened. In addition, these chattering often has one cycle of ON and OFF repetitions of 1 second or less. Therefore, the blower and the smoke eliminating burner interlocked therewith have a drawback that they are repeatedly turned on and off. Therefore, in view of the above-mentioned conventional drawbacks, the present invention provides an incinerator capable of stably supplying air regardless of chattering of a wind pressure switch.

[0004]

In order to solve the above-mentioned problems, the present invention includes a combustion chamber in which an incineration object is stored, a smoke eliminating chamber communicating with the combustion chamber, a combustion chamber and a smoke eliminating chamber, respectively. A blower equipped with a burner that radiates combustion flames and a smoke elimination burner, and a wind pressure switch that sends air to the smoke exhaust in the smoke exhalation chamber to discharge the smoke into the outside air and sense the wind pressure of the compressed air. And.
When the power switch is turned on, the blower is energized for a first predetermined time, and when the wind pressure switch detects a wind pressure equal to or higher than a predetermined value after the first predetermined time has passed, the blower continues to be energized and a first predetermined time elapses. When the wind pressure switch does not detect the wind pressure higher than the predetermined value later, electricity is supplied to each blower depending on whether or not the wind pressure switch again detects the wind pressure higher than the predetermined value within the second predetermined time after the wind pressure switch does not detect the wind pressure. It controls to continue and stop.

[0005]

As described above, according to the present invention, when the power switch is turned on, the blower is energized for the first predetermined time regardless of whether or not the wind pressure switch detects a wind pressure above a predetermined value. It is operated continuously. Further, even if the wind pressure switch is repeatedly turned on and off while the blower is operating stably, the blower is continuously operated and stable air supply is performed if it is repeated within the second predetermined time.

[0006]

Embodiment An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a sectional view of the incinerator according to this embodiment. In this figure, a combustion chamber 1 is a chamber surrounded by a combustion cylinder 2, which is made of an iron plate and has a substantially double-layered structure, a bottom portion 3, and a lid 4. The lid body 4 pivotally supports a part to open and close the charging port 5 of the combustion cylinder 2. The L-shaped discharge pipe 6 is connected to the central portion, and the handle 7 winds the wire 8 or loosens the winding. The above-mentioned opening / closing operation is performed.

A burner 9 for combustion that is provided below the side wall of the combustion cylinder 2 and radiates combustion flame toward the combustion chamber 1.
And the combustion chamber 1 provided above the side wall of the combustion tube 2.
The burner 10 for incineration which radiates a combustion flame toward is provided. The combustion burner 9 is mainly composed of a blower 11, a duct 12 fixed to the blower 11, and a burner body (not shown) fixed to the duct 12 and provided with a nozzle. An ignition plug is arranged near the nozzle described above, and an electromagnetic pump for pressure-feeding kerosene and an optical sensor (not shown) for observing the presence or absence of ignition are arranged around the blower 11. When the output signal is input to the burner 9, the blower 11 rotates, the spark plug sparks, and kerosene is supplied from the electromagnetic pump to the nozzle to burner 9.
Is ignited. Ignition is confirmed by an optical sensor and combustion begins. Like the burner 9, the burner 10 also includes a blower 13, a duct 14, a nozzle, a burner body, an ignition plug, an electromagnetic pump, and an optical sensor, and performs the same ignition and combustion operations as the burner 9. The grate 15 supports the incineration object 16 input from the input port 5, and has a transmission hole formed in a suitable place so that the ash after incineration passes and is dropped on the ash outlet 17.

The water sprinkler 18 is provided on the side wall of the combustion tube 2 and generates fog when the temperature in the smoke eliminating chamber 19 described later exceeds a predetermined temperature, and controls the heat generation amount of the burner 9 or the burner 10. To do. Head 20 is sprinkler 1
8 is a long one that is located at the tip of 8 and is curved along the combustion tube 2, and has holes formed at predetermined intervals.

The smoke extinguishing cylinder 21 is disposed above the combustion cylinder 2 and has a smoke extinguishing chamber 19 for burning the unburned gas discharged from the combustion chamber 1. The temperature sensor 22 is a sensor that is attached to the inner wall of the smoke eliminator 21 and detects the temperature of the smoke eliminator 19. A thermometer (not shown) connected to the temperature sensor 22 is used to incinerate the incinerated substance 16 in the combustion chamber 1.
The predetermined temperature is set according to the type of. This predetermined temperature is about 700 ° C for self-combustibility (the property that it will continue to burn naturally once ignited) is low and for garbage that requires continuous ignition or rubber that is forced to ignite until self-combustion occurs.
Is set to about 750 ° C. when burning tires, plastics, etc., which have no moisture and are highly self-combustible.

The smoke extinguishing burner 23 is provided in the lower part of the smoke extinguishing cylinder 21 and injects a combustion flame toward the inside of the smoke extinguishing chamber 19 from the lower part. It is provided above 23, and absorbs and removes odors and gases that fill the inside of the smoke eliminating chamber 19 because the smoke eliminating burner 23 becomes hot due to overheating. The first exhaust duct 25 connects the lower portion of the combustion tube 2 and the smoke extinguishing tube 21 to each other.
6 is connected between the burner 9 and the burner 10 of the combustion cylinder 2 and communicates with the smoke extinguishing cylinder 21, the third exhaust duct 27 communicates the upper part of the combustion cylinder 2 with the smoke extinguishing cylinder 21, and the fourth exhaust duct 2
8 is connected to the discharge pipe 6 when the lid 4 is closed, and is connected to the combustion cylinder 2
And the smoke eliminator 21 are provided so as to communicate with each other.

The chimney 29 is fixed to the upper part of the smoke extinguishing chamber 19 and has a pipe-like shape with its upper end opened to the outside air. Inside the chimney 29, a smoke passage is formed to connect the smoke extinguishing chamber 19 and the outside air. . The air supply duct 30 has an opening at the upper end connected to the lower end of the chimney 29. The blower 31 pressure-feeds air to the smoke in the smoke eliminating chamber 19 through the air duct 30, and the smoke mixed with the air is discharged to the outside air through the chimney 29.

As described above, the smoke emitted by the combustion of the incineration object 16 in the combustion chamber 1 is drawn into the smoke eliminating chamber 19, is secondarily burned by the smoke eliminating burner 23, and is the secondarily burned smoke. Are pumped by a blower 31 and discharged through a chimney 29. The air for sending the flue gas is for forcibly discharging the flue gas into the outside air in this device and for suppressing the temperature rise of the inner wall of the smoke eliminating chamber 19. Therefore, the blower 31 needs to pump a large amount of air. Therefore, the blower 31 is provided with a wind pressure switch 32 as a safety device that stops the energization of the blower 31 unless it detects a predetermined air volume, that is, a wind pressure of a predetermined value or more. The main incinerator 33 is configured by these components.

Next, the control means of the incinerator 33 will be described with reference to the control block diagram of FIG. In this figure, the control device 34 is composed of, for example, a microcomputer for controlling based on the contents programmed beforehand, or a relay sequence. The automatic manual changeover switch 35 selects either the automatic course or the manual course, and its output is input to the control device 34. The power switch 36 is for starting operation, and the wind pressure switch 32 is for turning off and turning on the contacts according to whether or not the pressure of the air blown by the blower 31 is above a predetermined value. This output signal of the wind pressure switch 32 is input to the control device 34 through a timer 37 described later. The temperature measured in the smoke eliminating chamber 19 by the temperature sensor 22 is input to the controller 34, the operating time (combustion time and smoke eliminating time) is set by the main timer (not shown), and the output is the controller. Has been input to 34. The blower 31, the smoke eliminating burner 23, the burner 9, the burner 10, and the sprinkler device 18 are ON / OFF controlled according to the output signal of the control device 34.

Further, a part of the circuit including the control device 34 will be described with reference to the circuit diagram of FIG. In this figure, the AC power supply 38 is connected to one power supply line 39 and the other power supply line 40. The power switch 36, the contact T _B1 of the off timer T _B , and the electromagnetic contactor MC are connected in series between the power lines 39 and 40. The contact M _C1 of the electromagnetic contactor MC is connected in parallel with the power switch 36, and the automatic manual changeover switch 3
5 and the contact M _C2 of the electromagnetic contactor MC are connected in series and both power supply lines 3
It is connected between 9 and 40. The contact T _A1 of the on-timer T _A, the wind pressure switch 32, and the timer T _B are connected in series between both power supply lines 39 and 40, and the timer T _A and the blower 3
The motor M of No. 1 and the smoke eliminating burner 23 are connected in parallel between both power supply lines 39 and 40. Also the wind pressure switch 32
Contacts are closed when there is no air blow.

Next, the operation will be described with reference to FIG. The automatic manual changeover switch 35 is set to the automatic position to close the contact, the power switch 36 is pressed to close the contact, and the voltage is applied to the electromagnetic contactor MC. Then, the contacts M _C1 and M _C2 are closed and the on-timer T _A starts timing, and at the same time, it is applied to the motor M of the blower 31 and the smoke eliminating burner (S) 23, and the smoke eliminating burner 23 is ignited to start combustion. Since the contact T _A1 is open during that time, the operation of the wind pressure switch 32 does not affect the blower 31 and the smoke eliminating burner 23.

Next, the on-timer T _A has the first predetermined time 4
When the timing of 1 (for example, 10 seconds) is completed, the contact T _A1 is closed. The blower 31 is operated to continue, if the air pressure switch 32 senses the air pressure of the predetermined value or more, does not energize the off timer T _B open contact of the air pressure switch 32 is, power supply to the motor M of the blower 31 The smoke elimination burner (S) 23 continues to burn.

[0017] When the if fewer air volume of the blower 31 or blown by accident something is stopped, the air pressure switch 32 is the timing of the off-timer T _B closes contacts of the air pressure switch 32 will not sense the wind pressure of a predetermined value or more Be started. The off timer T _B has a second predetermined time 42 (for example, 15 seconds).
If the contact of the wind pressure switch 32 does not open once before the end of the time measurement, that is, if the wind pressure switch 32 does not sense the wind pressure above the predetermined value again during the second predetermined time 42, the off timer T _When the timing of _B ends, the contact T _B1 opens, and the power supply to the motor M of the blower 31 and the smoke eliminating burner 23 is stopped.

Further, when the wind pressure switch 32 no longer senses the wind pressure above the predetermined value and the wind pressure switch 32 again senses the wind pressure above the predetermined value by the end of the second predetermined time 42 (for example, 14 seconds). opens the contacts of the air pressure switch 32 is off timer T _B is the measured time is reset back to zero, the motor M and Shokemuri burner 23 of the blower 31
Energization continues.

Next, the operation of the incinerator 33 will be described with reference to the flowcharts of FIGS. 4 and 5. FIG. 5 shows a continuation of the flowchart shown in FIG. In these figures,
It is started in standby (S1), the automatic course is selected by the automatic manual changeover switch 35, and the operating time (combustion time and smoke elimination time) is set by the main timer (S2). When the power switch 36 is turned on (S3), the blower 31 is turned on, the smoke eliminating burner 23 is ignited, and the on timer T
Timing of _A starts (S4). After that, ignition is confirmed by the optical sensor of the smoke eliminating burner 23, and the combustion of the smoke eliminating burner 23 starts (S5). ON timer T _A is the first predetermined time 4
When the timing of 1 is finished (S6), the combustion of the smoke eliminating burner 23 and the operation of the blower 31 are continued (S7).

Further, when it is determined that the wind pressure switch 32 is ON (the wind pressure above a predetermined value is detected) (S8),
Continue to energize the blower 31 and burn the smoke elimination burner 23,
When the predetermined idle time (operation of only the smoke eliminating burner 23 and the blower 31) ends (S9), ignition of the burner 9 and the burner 10 starts (S10), and step A follows. (At this time, the smoke eliminating burner 23 and the blower 31 are continuously operated.) Next, when the air volume of the blower 31 decreases due to something unusual, the wind pressure switch 32 detects (the wind pressure above a predetermined value is detected. That is) is determined to be NO (S8), the off timer T _B is turned on, and time counting is started (S11). After that, when it is determined to be NO for "the wind pressure switch 32 is OFF" (S12), that is, when the wind pressure switch 32 detects a wind pressure equal to or higher than a predetermined value, the operation is restarted from step S7 and the blower 31 and the smoke eliminating burner 23 are restarted. Energization continues.

If the off-timer T _B ends the second predetermined time 42 (S13) while the wind pressure switch 32 remains OFF (a wind pressure above a predetermined value is not sensed) (S13), the power supply to the smoke eliminating burner 31 is stopped. (S14), original step S1
Return to. At this time, not only the chattering of the wind pressure switch 32, but a serious abnormality with respect to the blow of the blower 31 (for example, something is caught in the fan of the blower 31 and it is not rotating, or an air amount adjustment damper attached to the fan is normal). All operations are stopped because there is a possibility that the air supply duct 30 or the chimney 29 is clogged with something or the position is not adjusted.

Next, as shown in FIG. 5, as a continuation of step A, combustion of the burners 9 and 10 starts (S15),
If the wind pressure switch 32 detects a wind pressure above a predetermined value (S
16), the burners (9, 10) continue to burn (S17),
When the combustion time set by the main timer ends (S1
8), the burners (9, 10) stop combustion (S19),
When the wind pressure switch 32 senses (S20) and the smoke elimination time ends (S21), the smoke elimination burner 23 stops (S2).
2). Then, the temperature of the smoke eliminating chamber 19 is measured by the temperature sensor 22, and if the temperature becomes equal to or lower than the set temperature (S2
3), the blower 23 is stopped (S24), and the process returns to step S1.

If the burners (9, 10) are burning (S1
5) If the wind pressure switch 32 does not detect the wind pressure above the predetermined value (S16), the off-timer T _B starts counting (S25), and the wind pressure switch 32 does not detect the wind pressure above the predetermined value (S26). When the second predetermined time 42 of the off timer T _B ends (S27), the burners (9, 10), the smoke elimination burner 23, and the blower 31 are stopped (S28).

Similarly, when the operation of the burners (9, 10) is finished (S19) and the wind pressure switch 32 does not detect a wind pressure above a predetermined value (S20), the off timer T _B is turned on (S29), and the wind pressure is changed. When the switch 32 does not sense the wind pressure above the predetermined value (S30) and the second predetermined time 42 of the off timer T _B ends (S31), the smoke removal burner 23 and the blower 31 are de-energized (S32). ), And returns to step S1.

As described above, the first predetermined time 41 and the second predetermined time 41
Each predetermined time 42 is an on-timer T _AAnd off timer T_B
Can be set arbitrarily. In addition, the control device 34
If you use a microcomputer,
Immer T_AAnd off timer T_BThe function of
This can be done inside the data.

[0026]

As described above, according to the present invention, when the power switch is turned on, the blower is energized for the first predetermined time regardless of whether the wind pressure switch senses a wind pressure of a predetermined value or more.
It is prevented that the blower is repeatedly turned on and off as in the conventional case, and the blower is continuously operated when the blower starts up. As a result, the smoke eliminating burner linked with the blower can also be operated stably and continuously. Also, when the blower is operating stably, the wind pressure switch chatters (turns on and off in a short cycle).
Even if the FF is repeated), the blower is continuously operated if it is repeated within the second predetermined time, and stable air supply can be performed. Further, if the wind pressure switch remains off for the second predetermined time or longer, it causes a serious change due to the reduction or stop of the air flow of the blower, so that the power supply to the blower, the smoke eliminating burner and the burner is stopped. Therefore, the safety of the device can be secured.

[Brief description of drawings]

FIG. 1 is a sectional view of an incinerator according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating control of the incinerator according to the embodiment of the present invention.

FIG. 3 is a circuit diagram including a control device in the incinerator according to the embodiment of the present invention.

FIG. 4 is a flowchart of an incinerator according to an embodiment of the present invention.

FIG. 5 is a diagram showing a flowchart following the flowchart of FIG.

[Explanation of symbols]

 1 Combustion chamber 9, 10 Burner 16 Incinerator 19 Smoke eliminating chamber 23 Smoke eliminating burner 31 Blower 32 Wind pressure switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuki Toyama 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Santo Denki Co., Ltd.

Claims (1)

[Claims] 1. A combustion chamber for accommodating an incineration object, a smoke extinguishing chamber communicating with the combustion chamber, a burner and a smoke extinguishing burner for radiating combustion flames to the combustion chamber and the smoke extinguishing chamber, respectively. And a blower provided with a wind pressure switch for sending air to the smoke in the smoke eliminating chamber to discharge the smoke into the outside air and to detect the wind pressure of the compressed air, and when the power switch is turned on, the blower is turned on. When the wind pressure switch senses a wind pressure equal to or higher than a predetermined value after energization for a first predetermined time and the wind pressure switch senses a wind pressure equal to or higher than a predetermined value, the fan is continuously energized When the wind pressure above the value is not sensed, the energization to the blower is continued depending on whether the wind pressure switch senses the wind pressure above the predetermined value again within a second predetermined time after the wind pressure is not sensed. An incinerator characterized by being controlled to stop.