KR101289512B1 - Wood boiler - Google Patents

Abstract

The present invention is to provide a firewood boiler for the house, in the construction of a grate fixed to the lower combustion chamber, the grate, the outer space consisting of a rectangular pipe so as to communicate with each other consisting of a pipe and spaced apart connecting the front and rear parts of the outer pipe. Consists of a plurality of intermediate pipes installed fixedly on the bottom of the combustion chamber, the heat recovery line is connected to the outer pipe located behind the combustion chamber, and the connection pipe connected to the heat storage tank through the outer wall of the combustion chamber to both outer pipes located in front of the combustion chamber. By combining is characterized in that the heating water is circulated through the pipe constituting the grate.

Description

Firewood boilers for homes {WOOD BOILER}

The present invention relates to a firewood boiler for producing heating water and hot water by using firewood as a fuel in a general home or a house, and in particular, by circulating the water inside the grate and improving the arrangement of heat exchange coils for hot water production. The present invention relates to a firewood boiler for a house that can effectively and conveniently use a firewood boiler in a general house.

As a fuel, firewood is self-sufficient, economical compared to most fuels such as kerosene and gas, and provides the energy resource for forest waste material that is left after thinning. In addition, since carbon dioxide emitted during the combustion process emits carbon dioxide absorbed during the photosynthesis process, there is an environmentally friendly advantage of not increasing the amount of carbon dioxide emitted.

Conventional firewood boilers include a combustion chamber for burning firewood in a cylindrical or box-shaped body, a flue for releasing combustion gas, a heat storage chamber formed on the outer wall of the combustion chamber to heat the heating water with combustion heat, and a heating circulation water. A heating water supply line and a heating water recovery line directly connected to the heat storage chamber for recovery after supply to the heating zone, a hot water supply line connected to a heat exchange coil installed in the heat storage tank to extract hot water, and a heating circulation reduced by vaporization Replenishment water supply device for continuous replenishment of water, and safety device to protect boiler in case of overheating or overpressure.It is installed at the bottom of combustion chamber to facilitate the discharge of combustion material, supply of air and support firewood. It consists of a grate.

When the firewood is burned by the above structure, the wall separating the combustion chamber and the heat storage chamber surrounding the heat is heated to heat the heating circulation filled in the heat storage chamber, and the heating water supply line when the heating circulation water reaches an appropriate temperature of 60 to 70 ° C. Heat is supplied through the process of circulating through the heating water recovery line after being provided to the heating zone, and when hot water is needed, the heat exchange is performed in the process of discharging the supply water connected to the water pipe through the heat exchange coil in the heat storage tank by opening the hot water valve. Hot water is produced.

Fossils have a shorter burning time than fossils or pellets and generate powerful thermal power instantly. Therefore, a large-capacity heat storage chamber is desirable to effectively absorb and regenerate the heat of combustion, and wood vinegar containing tar is generated during combustion. Because of the narrowing and poor heat transfer efficiency, flue and combustion chamber designs should be designed to allow periodic cleaning control. In the case of boilers using pellets as raw materials, regular feeding of fuel is easy by using automatic feeding device, but it is not easy to feed irregularly shaped firewood using automatic feeding device. It is preferable to put in a combustion chamber and to combust, and accordingly, the horizontal cylindrical boiler structure which can comprise a large-capacity combustion chamber and a heat storage chamber is utilized widely.

As such, existing horizontal cylindrical firewood boilers have a large-capacity combustion chamber and heat storage chamber structure, which can satisfy heating and hot water demand only by inputting firewood two or three times a day, and it is easy to secure a working space for internal cleaning. Although there is one advantage, in order to secure the space necessary for combustion, a high temperature heat acts directly on the grate in the state where the weight of the firewood is loaded on the grate installed on the entire length of the combustion chamber spaced from the bottom of the combustion chamber so that the heat damage of the grate occurs easily. There was this. That is, as shown in the Republic of Korea Utility Publication 1998-019156 (1998.7.6) shown in Figure 1a, the grill grate 6 is installed on the floor of the combustion chamber, the grate is loaded with a large amount of firewood As the direct heat of high temperature is repeatedly acted on, the entire frame is bent or distorted, which causes the durability of the boiler.

Due to this problem, the firewood boiler according to the Republic of Korea Patent 10-0846142 (2008.7.8) as shown in Figure 1b, the combustion is made by putting the firewood to contact the combustion chamber bottom without installing a grate on the bottom of the cylindrical combustion chamber (6) It suggests a structure to build. This is a structure that omits the grate and has the advantage of preventing boiler loss due to the deformation of the grate, but the direct contact between the firewood and the bottom of the combustion chamber, there is a problem that the initial ignition is difficult because the supply of air required for combustion is not desired. The first and second heat medium circulation parts 32 and 46 are disposed on the upper part of the combustion chamber in order to prevent the generated ash from being separated from unburned wood and difficult to discharge, and to reduce the combustion efficiency caused by condensate that surrounds the combustion chamber. By installing the circulation motors 36 and 52 to rapidly raise the temperature inside the combustion chamber at the initial stage of ignition, the combustion anxiety structure has to be solved such as condensation problems, and the manufacturing cost increases.

Regarding the deformation of the grate, Korean Patent No. 10-0793110 (2008.1.3) is arranged between the front water tank part 12 and the rear water tank part 13 while applying to a vertical firewood boiler as shown in FIG. 1C. And a heat exchange pipe 14b is installed in the front and rear water tanks, and the heat exchange pipe 14b is filled with water to prevent deformation of the heat exchange pipe 14b which performs the role of the grate by heat. It had a function. This configuration of filling water inside the grate provides the advantages of preventing damage to the grate construction pipe due to high heat and increasing heat absorption area in contact with the heat source to improve heat exchange efficiency. As bubbles are generated at the cavitation inside the pipe, there is a limit to the heat absorption performance and the grate heat deformation prevention performance. In addition, the heating water inside the tank has only a limited flow according to the heating water circulation, resulting in a large temperature difference depending on the zone, and thus a disadvantage in that the heating and hot water temperatures are not uniform. There was a problem that combustion is disturbed by condensate.

On the other hand, the use of hot water is the main purpose of using the body as a target, it is dangerous to increase the hot water temperature sharply, it is most preferable to maintain a constant temperature because the sharply lowered hot water temperature decreases the use satisfaction. Existing coal-fired boilers have a structure in which heat exchange coils are installed directly in the combustion chamber or heat exchange coils are placed close to the wall of the combustion chamber to produce hot water. . However, as mentioned above, since firewood boilers are not easy to apply to the automatic fuel supply system unlike pellet boilers, air is also actively supplied at the time of feeding firewood, which burns while maintaining high firepower, and stops feeding firewood. If the air supply is closed, combustion is slow with low fire power, and when the firewood is exhausted, the combustion ends. Therefore, there is a disadvantage in that the hot water demand is often generated when the thermal power is weak or the combustion is completed, and the temperature of the supply hot water is not uniform such as the hot water supply temperature is lowered.

KR Practical Publication 1998-019156 (1998.7.6) KR Patent 10-0846142 (2008.7.8) KR Patent 10-0793110 (2008.1.3)

In the present invention, in order to present a horizontal cylindrical firewood boiler, by improving the existing grate structure to configure the water in the pipe to be forced circulation without stagnation effectively solves the bubble generation and pipe damage problems due to direct heating, increase the heat absorption area It improves heat exchange efficiency, improves temperature uniformity by resolving local temperature difference of heating water in heat storage room, and minimizes condensate generated on grate surface during initial ignition of firewood, thereby relieving initial combustion disturbance problem. Has the purpose to provide.

In addition, an object of the present invention is to provide a firewood boiler which can obtain a uniform and safe hot water temperature by reducing the change in hot water temperature according to the combustion cycle in the existing firewood boiler.

In addition, the present invention can facilitate the internal cleaning and management of the firewood boiler, improve the durability life by minimizing the damage caused by heat, and furthermore can be configured to extend the combustion duration of the firewood by the automatic control of the air supply amount The purpose is to provide a firewood boiler.

The firewood boiler according to the present invention presented for the above purpose is a cylindrical body formed horizontally, a combustion chamber installed in the body to provide a space for burning the firewood, and a combustion chamber to heat and store heating water with combustion heat. A heat storage tank formed to surround the outer wall, a flue formed through the upper space of the heat storage chamber from the rear of the combustion chamber to discharge the combustion gas, and a circulating pump installed to supply and recover the heating circulation water to the heating zone; Heating water supply line and heating water recovery line directly connected to the heat storage tank, hot water supply line connected to the heat exchange coil installed in the heat storage tank to extract hot water, and supplemental water for continuously replenishing the heating circulation water reduced by vaporization Supply device, safety device to protect boiler in case of overheating or overpressure, discharge of combustion material and air A firewood boiler for a house comprising a grate installed at the bottom of a combustion chamber so as to smoothly supply and support a firewood, wherein the grate comprises a rectangular outer pipe configured to connect with each other and a front and rear part of the outer pipe so as to communicate with each other. Composed of a plurality of intermediate pipes spaced apart and fixedly installed on the bottom of the combustion chamber, the heating recovery line is connected to the outer pipe located behind the combustion chamber, and connected to the heat storage tank through the outer wall of the combustion chamber to both outer pipes located in front of the combustion chamber. By combining the pipes, the heating water is circulated through the pipes forming the grate.

In addition, the present invention, the bypass pipe for directly connecting the heating water supply line and the heating water recovery line is formed from the outside of the main body, the three-way valve is installed in the heating water supply line and the heating water recovery line connection, bypass The pipe is characterized in that the second circulation pump is installed so that the circulation of the heating water through the heating water supply line and the circulation of the heating water through the bypass pipe selectively.

In addition, the present invention is characterized in that the heat storage tank is formed to extend to the outside of the rear wall of the combustion chamber, the heat storage tank is provided with a heat exchange coil is connected to the hot water supply line outside the main body.

In addition, the present invention is characterized in that the air supply device for electrically adjusting the opening and closing amount is installed in the door for opening and closing the combustion chamber.

In the present invention, the heating water is circulated through the pipe constituting the grate to prevent damage due to the direct heating of the grate, bubbles are suppressed to improve the heat absorption performance. In addition, by supplying water to the grate through the heating water recovery line, the cooling effect of the grate is increased, and the supply water is sufficiently heated in the process of passing through the pipe to be discharged to the heat storage tank, thereby improving the uniformity of the heating water temperature inside the heat storage tank. .

In addition, by installing a bypass pipe that directly connects the heating water supply line and the heating water recovery line, it is possible to operate a firewood boiler for the purpose of producing hot water irrespective of heating, making it possible to use a four-season firewood boiler. It is possible to operate the circulation of the heating water through the pass pipe so that the internal temperature of the heat storage tank can be quickly increased, and the second circulation pump is operated even when the circulation pump is stopped to suppress the supply of the heating water at a low temperature. By virtue of the circulation inside the grate, thermal damage due to overheating can be prevented.

In addition, the present invention has the advantage that it is possible to stably maintain the hot water temperature by installing a heat exchange coil in the extended heat storage tank in the rear of the combustion chamber that does not directly receive the heat of combustion to maintain a uniform temperature regardless of the combustion cycle.

In addition, according to the present invention, the air supply can be adjusted according to the heating or heat storage tank internal temperature by installing the air supply to control the amount of opening and closing, and the combustion can be delayed in the state where the air supply is completely closed, thereby extending the firing cycle. That provides the benefits.

1a to 1c is a structural diagram of a conventional firewood boiler
2 is a perspective view of the configuration of a firewood boiler according to the present invention
3 is an internal configuration of a firewood boiler according to the present invention
4 is a cross-sectional view of aa part of FIG.
5 is a cross-sectional view of the portion bb of FIG.
6 is an embodiment of a grate according to the present invention
7 is an embodiment of the air supply device

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail with reference to the accompanying drawings.

2 to 5, the main body 10 of the cylindrical shape, the combustion chamber 20 is provided in the main body to provide a space for burning the firewood, and to heat the heating water by the heat of combustion The heat storage tank 30 is formed so as to surround the outer wall of the combustion chamber, the flue 40 formed in front of the main body by passing through the upper space of the heat storage chamber from the rear of the combustion chamber to discharge the combustion gas, and the heating circulation water is supplied to the heating zone. Hot water connected to the circulation water pump 51 and the heating water supply line 50 and heating water recovery line 60 directly connected to the heat storage tank, and the heat exchange coil 71 installed in the heat storage tank to extract hot water. Supply line 70, supplementary water supply device 80 for continuously replenishing the heating circulation water reduced by vaporization, safety device 90 for protecting the boiler in case of overheating or overpressure, and discharge of combustion materials And of air Smoothly class and give sustained harmony applies to residential reconciled boiler comprising a grate (100) disposed on the combustion chamber bottom.

The boiler body 10 is formed in a horizontal cylindrical shape, the outer wall is covered with a heat insulating material (11) for heat insulation and heat insulation, there is a support angle 12 in the front and rear of the lower is installed on a flat bottom foundation.

The combustion chamber 20 is formed in a cylindrical shape in the main body, the inner space of the wall constituting the cylinder constitutes the combustion chamber, the outside constitutes the heat storage tank 30, the door 21 for opening and closing in front of the combustion chamber is installed The inner side of the door is coated with a fireproof material 22 to prevent deterioration.

The heat storage tank 30 stores the heating water heated by absorbing the heat of combustion of the firewood, and the heat storage tank is filled with the heating water, and the supplementary water is supplied by the supplemental water supply device 80 as much as was consumed by vaporization. Maintaining the water level, the drain valve 140 is installed in the lower portion is configured to discharge the water inside the system when stopping the exchange of heating water and long-term operation.

The flue 40 has a first flue 41 formed vertically at the end of the combustion chamber, and a plurality of second flues 42 disposed in the front of the main body through the heat storage tank 30 in the first flue 41. And an opening and closing port 43 formed in front of the main body for management of the second year, and a third year 44 formed vertically in front of the main body. The first year and the second year are formed in the heat storage tank, the heat absorption by the heating water is made in the flue gas process, the third year is connected to the chimney 45, and the surface contacting the outside air, including the opening and closing 43 It has a structure which coat | covers with the fireproof material 46 and prevents deformation by overheating.

The present invention is characterized in that the grate 100, the grate structure according to the present invention, consisting of a pipe each consisting of a rectangular outer pipe 101 is formed in a rectangular shape so as to communicate with a plurality of intermediate connecting the front and rear parts of the outer pipe Composed of a pipe 102 and fixed to the bottom of the combustion chamber, the heat recovery line 60 is connected to the outer pipe 101a located behind the combustion chamber, and the combustion chamber outer wall is connected to both outer pipes 101b positioned in front of the combustion chamber. The connection pipe 103 connected to the heat storage tank 30 through the coupling is coupled so that the heating water is circulated through the pipe constituting the grate.

Figure 6 illustrates the embodiment of the grate applied to the present invention, the outer pipe 101 is made of a square pipe to maintain a rectangular frame, the intermediate pipe 102 is made of a circular pipe for water permeability The inner space of each pipe is connected to each other so that water obtained from the rear is discharged through the connecting pipe 103 in the front, and the intermediate pipes 102 are spaced apart from each other and support the intermediate pipes at regular intervals. Horizontal member 104 is installed is configured to prevent deformation due to the load of firewood.

The grate is stably supporting the firewood under high heat by being fixed to both sides of the outer pipe in contact with the combustion chamber in the state of being installed in the combustion chamber, through which the air supply for combustion and the separate discharge of the combustion material are made.

The water received into the grate through the heating recovery line 60 is deprived of heat in the process of passing through the heating zone, which is lower than the temperature of the water in the heat storage tank, which is advantageous for cooling the grate exposed to heat.

The water obtained into the interior through the heating recovery line 60 serves to cool down the grate and restrain deformation, thereby absorbing heat and releasing it into the heat storage tank, and the heating water of the heat storage tank is heated by the circulation pump 51. The heating circulation water supplied to the heating zone 110 through the water supply line 50 and cooled by heat exchange in the heating zone constitutes a circulation cycle introduced into the grate through the heating water recovery line 60. Therefore, the water inside the grate continuously maintains the flow state, thereby preventing bubbles generated in the overheated state and effectively absorbing heat, and inducing the flow inside the heat storage tank to maintain a uniform temperature.

The present invention is the bypass pipe 120 is directly connected to the heating water supply line 50 and the heating water recovery line 60 from the outside of the main body, the three-way valve is connected to the heating water supply line and heating water recovery line 121 is installed, and the second bypass pump 122 is installed in the bypass pipe to present a configuration of a firewood boiler in which the circulation of the heating water is performed through the bypass pipe.

The three-way valve 121 may be implemented in a structure that is electrically operated by a manpower or a control device (not shown).

The bypass pipe can control the flow of the heating circulating water in one of the following ways.

A) Heat storage tank-Heating water supply line-First circulation pump (51)-Heating zone 110-Heating recovery line-Grate-Heat storage tank

B) Heat storage tank-Bypass pipe-2nd circulation pump-Heating recovery line-Grate-Heat storage tank

C) heat storage tank-grate

In the flow of A in the case that the heating circulation water temperature of the heat storage tank maintains an appropriate state (50 ~ 70 ℃) and the heating demand in the heating zone, the three-way valve 121 is opened to the heating zone and the second circulation pump is In a stopped state, there is a flow of heating circulation water.

The flow of B is that when the heating circulation water temperature of the heat storage tank is below an appropriate state (50 to 70 ° C.), when there is no heating requirement in the heating zone, or when the boiler is operated for hot water supply, the three-way valve 121 is bypassed. Opened by the pass pipe, the first circulation pump is stopped and the flow of the heating circulation water.

C may be selected as needed to stop the flow of water inside the grate to prevent condensate generation by cold water at the initial grate of the firewood.

The flow and operation of the three-way valve and the circulation pump can be automatically realized by applying a program that selects an appropriate driving method by interpreting the values of the temperature sensors installed in the combustion chamber, heat storage tank, and heating zone as a control device. In the absence of seasons, heating zones maintain the proper heating temperature and stop the heating cycle.

The present invention, the heat storage tank is formed to extend to the outside of the rear wall 23 of the combustion chamber 20, the heat storage tank 30 is a heat exchange coil 71 is installed is connected to the hot water supply line 70 outside the main body It also presents a firewood boiler.

The heat exchange coil 71 is formed by winding a copper pipe having good heat transfer performance in the form of a coil, and absorbs heat from the heating water of the heat storage tank and is discharged as hot water in the process of supplying externally supplied water through the heat exchange coil. .

The heat exchange coil 71 is sufficiently spaced apart from the flue or the outer wall of the combustion chamber, and is formed in an extended heat storage tank at the rear of the combustion chamber where the temperature is relatively stable, thereby maintaining a constant hot water temperature without being affected by the combustion cycle and providing safe use. to provide.

The present invention also proposes a firewood boiler in which an air supply device 130 for electrically controlling the amount of opening and closing is installed in the door 21 for opening and closing the combustion chamber.

The air supply device may be configured in various forms, and FIG. 7 illustrates an embodiment of the air supply device. The air supply device 131 formed on the door, the shutter 132 for opening and closing the air supply device, and the shutter It consists of a stepping motor (133) for controlling the driving.

The stepping motor is connected to the control device and the temperature sensor is configured to open or close the air supply 131 or adjust the amount of opening and closing according to the conditions, when the temperature of the heat storage tank is more than a predetermined amount close the air supply to reduce the thermal power, temperature of the heat storage tank When the temperature falls below a certain level, it opens the air supply and increases the fire power, and controls the combustion degree of the injected firewood.

10: main body 11: insulation 12: support angle
20: combustion chamber 21: door 22: fireproof material
23: rear wall
30: heat storage tank
40: year 41: first year 42: second year
43: opening and closing 44: third year 45: chimney
46: fireproof material
50: heating water supply line 51: circulation pump
60: heating recovery line
70: hot water supply line 71: heat exchange coil
80: supplementary water supply device
90: safety device
100: grate 101: outer pipe 102: middle pipe
103: connecting pipe 104: horizontal member
110: heating zone
120: bypass pipe 121: three-way valve 122: second circulation pump
130: air supply 131: air supply 132: shutter
133: stepping motor

Claims (4)

A cylindrical body formed horizontally, a combustion chamber installed in the main body to provide a space for burning the firewood, a heat storage tank formed to surround the outer wall of the combustion chamber for warming and storing the heating water with combustion heat, and releasing the combustion gas To the front of the main body by passing through the upper space of the heat storage chamber at the rear of the combustion chamber, and a heating water supply line and a heating water recovery line directly connected to the circulation pump and the heat storage tank installed to supply and recover the heating circulation water to the heating zone. And a hot water supply line connected to the heat exchange coil installed in the heat storage tank to extract hot water, a supplemental water supply device for continuously replenishing the heating circulation water reduced by vaporization, and a safety to protect the boiler during overheating or overpressure. In the combustion chamber bottom to facilitate the discharge of combustion equipment and supply of air and support of firewood In a firewood boiler for a house comprising a grate to be fitted, wherein the grate is composed of a pipe each consisting of a rectangular outer pipe and a plurality of spaced apart intermediate pipes connecting the front and rear of the outer pipe is fixedly installed on the floor of the combustion chamber The heating water recovery line is connected to the outer pipe located at the rear of the combustion chamber, and the connecting pipe connected to the heat storage tank through the outer wall of the combustion chamber is coupled to both outer pipes located at the front of the combustion chamber, so that the heating water forms a grate. A firewood boiler for homes, characterized by being circulated.
The method according to claim 1,
A bypass pipe for directly connecting the heating water supply line and the heating water recovery line is formed outside the main body, and a three-way valve is installed at the connection portion of the heating water supply line and the heating water recovery line, and the second circulation pump is provided in the bypass pipe. Is installed is a firewood boiler for the house, characterized in that the circulation of the heating water through the heating water supply line and the circulation of the heating water through the bypass pipe is selectively made.
The method according to claim 1,
A heat storage tank extends to the outside of the rear wall of the combustion chamber, and the extended heat storage tank has a heat exchange coil installed to connect with the hot water supply line outside the main body.
The method according to claim 1,
A firewood boiler for a house, characterized in that an air supply device for controlling the amount of opening and closing is installed in the door for opening and closing the combustion chamber.

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