JPH094814A - Combustion device fro both of solid and fluid fuels - Google Patents

Abstract

PURPOSE: To make manual operation, necessitated for a solid fuel device, unnecessary and permit automatic complete combustion by a method wherein a solid fuel combustion detecting means, detecting the temperature of a solid fuel combustion unit and monitoring the temperature rise of a temperature detector by increasing the amount of ventilating air through a ventilating amount changing mechanism, provided in a ventilating fan, is provided. CONSTITUTION: Solid fuel is supplied onto the grate 2 of a combustion chamber 1 through a solid fuel charging port 3 to ignite and burn it by the flame of fluid fuel. During stopping the operation of a combustion device, the operation of a burner 4 for fluid fuel is stopped and a solid fuel combustion detecting means is operated. The solid fuel combustion detecting means monitors the rise of detecting temperature of a temperature detector 6 while increasing the amount of ventilation by a ventilating amount changing mechanism 5a and when a temperature rise is recognized, the detecting means judges that the solid fuel is burnt. When the rise of detecting temperature of the temperature detector 6 is not recognized during repeating this operation, it is judged that the combustion of solid fuel is finished and the operation of the ventilating fan 5 as well as a combustion device are stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus which burns both a fluid fuel such as gas and kerosene and a solid fuel such as dust and firewood.

[0002]

2. Description of the Related Art Combustion devices in which a combustion device that burns solid fuel and a combustion device that burns fluid combustion of gas or kerosene are integrally combined have been put to practical use as a hot water boiler or a heating stove. . Instead of conventional fuels such as coal and wood as solid fuels, dust, waste materials and some waste plastics have been used recently, and as a combustion device, these are discarded when heating and hot water supply by a burner for fluid fuel. This is the effective use of the thermal energy of a material.

In a general structure, a rostrut is installed in the combustion chamber of the fluid fuel burner, and the solid fuel is injected from the solid fuel inlet into the burner for operating the fluid fuel burner.
The burner flame at this time ignites the solid fuel. After that, the calorific value of the burner for fluid fuel is reduced to perform mixed combustion, or the fuel supply to the burner for fluid fuel is stopped to burn only solid fuel.

[0004]

The solid fuel, once ignited, continues to burn until the entire amount of the solid fuel injected into the solid fuel combustion section burns up. In the case of the temperature and the water heater, the temperature of the hot water decreases, and this signal restarts the operation of the fluid fuel burner.

On the other hand, when the calorific value of the solid fuel increases, the burner controller for the fluid fuel controls the calorific value of the combustion device by controlling the combustion amount including the operation stop of the burner for the fluid fuel, and the heating that is expected in the stove is performed. The effect can be obtained, and the boiler can provide the expected constant temperature hot water in combination with the automatic temperature control valve.

However, in order to stop the operation of the combustion apparatus, it is necessary to switch to the solid fuel combustion operation and supply the combustion air with the blower until the solid fuel injected into the solid fuel combustion section of the combustion chamber is burned up. However, in the past, there was no device to detect the burning of this solid fuel, and the operator sometimes opened the solid fuel inlet to check the combustion state and stopped the operation of the combustion device manually after confirming complete extinction. Therefore, it is considered that such inability to perform fully automatic operation hinders the spread of this type of product.

[0007]

According to the present invention, a gust 2 is provided in the middle of a combustion chamber 1, a solid fuel combustion part 1a is provided on the upper part of the gust, and the solid fuel combustion part 1a is provided above or to the side. Is provided with a solid fuel inlet 3, a burner 4 for fluid fuel is attached to the solid fuel combustion section 1a, and a blower 5 for combustion is attached to the burner 4 for fluid fuel. In a combustion device that can also be operated, a temperature detector 6 that detects the temperature of the solid fuel combustion section 1a
In addition, the blower 5 is provided with an air blowing amount varying mechanism 5a, and the solid fuel combustion detecting means 7 for monitoring the temperature rise of the temperature detector 6 while increasing the air blowing amount by the air blowing amount varying mechanism 5a is provided. When the temperature of the detector 6 rises, it is determined that the solid fuel is burning.

Further, a timing means 7a is attached to the solid fuel combustion detection means 7, and the solid fuel combustion detection means 7 performs a detection operation by a signal of the timing means 7a,
It is possible to immediately notify the termination of solid fuel combustion.

Further, the temperature detector 6 is composed of a radiant heat sensor and can be attached to the fluid fuel burner 4 to serve as a combustion detector of the fluid fuel burner 4 as well. The output level of the detector 6 is detected, and the output change of the temperature detector 6 is detected during solid fuel combustion.

[0010]

[Function] The combustion state in which the solid / fluid fuel can be combusted is changed from the solid fuel inlet 3 to the loss 2 of the combustion chamber 1 prior to the operation.
The solid fuel is supplied to the above to start the combustion of the fluid fuel, and the solid fuel starts the ignition combustion by the flame of the fluid fuel. The heating / hot water supply capacity is changed by the control of the fluid fuel burner 4, and the blower 5 continues to operate even when the combustion amount is varied and the operation is intermittent.

When the operation of the combustion apparatus is stopped, the operation of the fluid fuel burner is stopped and the solid fuel combustion detection means 7 is operated. The solid fuel combustion detection means 7 monitors an increase in the temperature detected by the temperature detector 6 while increasing the air flow rate by the air flow rate variable mechanism 5a, and when the temperature increase is recognized, it is determined that the solid fuel combustion is in progress. Then, when the temperature detected by the temperature detector 6 is not increased while repeating this operation, it can be determined that the combustion of the solid fuel is completed, the operation of the blower 5 is stopped, and the operation of the combustor is stopped.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment of a heating stove. Reference numeral 1 is a combustion chamber, 2 is a rostrtor mounted in the middle of the combustion chamber 1, and 3 is a side wall of the combustion chamber 1 above the rostrtor 2. It is a solid fuel input port provided, and the solid fuel is input to the solid fuel combustion unit 1 a above the roster 2 by opening the solid fuel input port 3.

Reference numeral 4 denotes a burner for a fluid fuel which is mounted so as to look into the solid fuel combustion section 1a. Reference numeral 5 denotes a blower which is mounted on the burner 4 for a fluid fuel and sends combustion air to the combustion chamber 1. The fluid fuel burner 4 of the embodiment is a pressure spray type burner using kerosene as fuel, 8 is a spray nozzle, and 9 is a spray nozzle 8.
A fuel pump 10 for supplying kerosene pressurized to a fuel cell 10 is an ignition device for generating a discharge spark for ignition and igniting atomized fuel.

Reference numeral 11 is a fluid burner starting means composed of operation switches, 12 is a signal received from the fluid burner starting means 11 to start the operation, and controls the fluid fuel burner 4 while displaying the operating condition on the display means 13 as appropriate. This is a fluid burner controller. The fluid burner controller 12 receives a signal from a room temperature detector (not shown) as an input and receives the fuel pump 9
When the solid fuel is supplied to the solid fuel combustion section 1a in the combustion chamber 1 and the ignition of the fluid fuel burner 4 is performed by the flame, the amount of heat generated from the entire combustor is controlled. Therefore, a large amount of combustion, including extinguishing the burner 4 for the fluid fuel, can be adjusted.

Reference numeral 14 is a solid for burning the solid fuel additionally charged from the solid fuel charging port 3 without stopping the operation of the fluid fuel burner 4 and automatically operating by a signal from the room temperature detector or the like. The burner starting means, 15 is a solid burner controller, 7 is a solid fuel combustion detection means, 5a is a blower amount variable mechanism of the blower 5, and the solid burner controller 15 mainly burns the solid fuel while controlling the blower 5 of the blower 5. The driving status is displayed by the display means 16.

Reference numeral 6 denotes a temperature detector composed of a radiant heat sensor, which is mounted on the windward side of the combustion air so as not to be affected by combustion exhaust gas and ash. The temperature detector 6 of the embodiment is attached to the fluid fuel burner 4 and is a position where both the flame of the fluid fuel burner 4 and the heat generated from the solid fuel combustion section 1a except the fluid fuel burner 4 can be detected. It is in.

Therefore, when the fluid fuel burner 4 is started by the fluid burner starting means 11, the ignition of the ignition device 10 is stopped after the ignition is confirmed by the signal of the temperature detector 6, and the combustion is in progress. When the misfire is detected by the signal from the temperature detector 6, the safe operation is performed.

On the other hand, after the operation of the fluid fuel burner 4 is stopped by the solid burner starting means 14, the temperature detector 6 is connected to the input of the solid fuel combustion detection means 7 to operate the fluid fuel burner 4. When an input signal equal to or more than the output signal suitable for solid fuel combustion different from the above time is obtained, the solid fuel combustion detection means 7 determines that the solid fuel is burning normally, and the blown air amount varying mechanism 5a controls the appropriate combustion air. The amount is sent to the solid fuel combustion section 1a.

Reference numeral 7a is a timing means attached to the solid fuel combustion detecting means 7, and the temperature detector 6 is provided at the time of solid fuel combustion.
When the solid fuel combustion detection means 7 determines that the solid fuel combustion detecting means 7 is in a fire extinguishing state, the blown air amount is increased more than the blown air amount corresponding to the output signal of the temperature detector 6, and the temperature detected by the temperature detector 6 becomes If it rises, it confirms that the solid fuel is burning in every other state.

The timing means 7 automatically confirms such a combustion state by manual operation without performing many times, and the timing means 7 sends a start signal to the solid fuel every 20 seconds to 3 minutes. When the solid fuel is confirmed to be combusted by sending it to the combustion detecting means 7, the blast air is increased and the ash is blown off, and when the temperature detector 6 does not detect the temperature rise even if the oxygen supply is increased, the The solid fuel in the state is burned, and the blower 5 is stopped to stop the operation of the combustor.

[0021]

As described above, according to the present invention, the confirmation of the combustion state in the solid fuel combustion unit 1a is realized for the first time by detecting the increase in the amount of blast air and the temperature rise in the solid fuel combustion unit 1a. Because of the instability of the detection by the sensor, it was possible to obtain an epoch-making effect that defies the idea that combustion detection of solid fuel is impossible.

Further, since the solid fuel combustion detection means 7 is provided with the timing means 7a, the timing means 7a automatically repeats the detection operation for detecting the increase in the blown air amount and the temperature rise. When the combustion of the solid fuel is completed, the combustor can be automatically stopped, the manual operation required for the solid fuel combustion device is not required, and completely automatic combustion is possible for the first time.

Further, if the combustion flame sensor attached to the fluid fuel burner 4 as the temperature detector 6 is constituted by a radiant heat sensor, the temperature detector 6 detects combustion between the fluid fuel burner 4 and the solid fuel combustion section 1a. Since it can be used also as, it can be implemented with an extremely simple structure.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a combustion apparatus according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a control unit of the combustion apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion chamber 1a Solid fuel combustion part 2 Rostru 3 Solid fuel input port 4 Fluid fuel burner 5 Blower 5a Blower amount variable mechanism 6 Temperature detector 7 Solid fuel combustion detection means 7a Timing means

Claims (3)

[Claims] 1. A roster 2 is provided in the middle of the combustion chamber 1, a solid fuel combustion section 1a is provided on the upper side of the rostrut 2, and a solid fuel injection port 3 is provided above or at the side of the solid fuel combustion section 1a. In a combustion device in which a burner 4 for fluid fuel is attached to the solid fuel combustion section 1a, and a blower 5 for combustion is attached to the burner 4 for fluid fuel, the blower 5 being operable even during solid fuel combustion. The temperature detector 6 for detecting the temperature of the solid fuel combustion section 1a is provided, and the blower 5 is provided with the air flow rate changing mechanism 5a. The air flow rate changing mechanism 5a increases the air flow rate to increase the air flow rate. A solid / fluid fuel combined combustion apparatus provided with a solid fuel combustion detection means 7 for monitoring a temperature rise. 2. The solid / fluid fuel dual combustion apparatus according to claim 1, wherein a timing means 7a is attached to the solid fuel combustion detection means 7, and the solid fuel combustion detection means 7 performs a detection operation in response to a signal from the timing means 7a. 3. The solid / fluid fuel dual-use combustion device according to claim 1, wherein the temperature detector 6 is composed of a radiant heat sensor and is attached to the fluid fuel burner 4 so as to also serve as a combustion detector of the fluid fuel burner 4.