KR20230162308A - Firewood Boiler With An Exhaust Gas Purifier - Google Patents

Abstract

The present invention relates to a firewood boiler equipped with a combustion gas purification device, and more specifically, to minimize heat loss from firewood by transmitting heat from paraffin heated to a certain temperature simultaneously and complexly in addition to the heat resulting from combustion of firewood. It is a wood-burning boiler that can maximize thermal efficiency and is harmless to the human body by effectively filtering and discharging harmful substances inevitably generated during combustion of wood. It can also prevent air pollution and does not impose separate restrictions on indoor installation. It's about.

Description

Firewood Boiler With An Exhaust Gas Purifier}

The present invention relates to a firewood boiler equipped with a combustion gas purification device, and more specifically, to minimize heat loss from firewood by transmitting heat from paraffin heated to a certain temperature simultaneously and complexly in addition to the heat resulting from combustion of firewood. It is a wood-burning boiler that can maximize thermal efficiency and is harmless to the human body by effectively filtering and discharging harmful substances inevitably generated during combustion of wood. It can also prevent air pollution and does not impose separate restrictions on indoor installation. It's about.

A wood-fired boiler is a boiler that generates heating and hot water by cutting and splitting wood into several pieces and putting it into the combustion space and burning it to generate heating and hot water. It uses solid fuel such as pellets and wood as its main fuel, and due to its material characteristics, While it has the advantage of a simple structure and low price, it has lower thermal efficiency compared to gas heaters or oil heaters, and since heating is done by heating the outer wall of the boiler, there is a high risk of accidents in case of direct contact, and it heats up quickly and burns when the firewood is finished. The disadvantage is that it cools down quickly, so it is difficult to expect a continuous heating effect.

In addition, firewood boilers produce acrid smoke when the firewood is first ignited, and ash and wood vinegar generated during combustion of firewood accumulate on the boiler's firebox, flue, and combustion port, so if not removed periodically, they will pollute the air and other environments. There is a problem that requires regular cleaning because it can cause health problems.

In addition, wood-fired boilers also have the problem that the combustion gases emitted during combustion of wood are hazardous to life and health when flown indoors, and when discharged outdoors, they cause air pollution and cause environmental destruction.

In addition, the smoke emitted when burning wood contains a significant number of harmful substances such as fine dust, carbon monoxide, hydrocarbons, benzopyrene, nitrogen dioxide, volatile organic compounds, ketones, and aldehydes, so special care is needed when treating combustion gases.

However, the wood-burning boiler of the prior invention only installs a flue on one side of the boiler and connects it directly to the outdoors without a special purification facility for processing combustion gas, so the smoke that flows into the room and the smoke that is discharged directly to the outdoors is harmful to health and pollutes the environment. It has the problem of pollution, and is pointed out as a problem that must be solved in addition to the disadvantage of low thermal efficiency.

Republic of Korea Patent Publication No. 10-1005721

The present invention was created to solve the above-mentioned problems in the prior art, and is a method of minimizing heat loss from firewood by simultaneously transmitting the heat of paraffin heated to a certain temperature in addition to the heat resulting from combustion of firewood. It can maximize thermal efficiency, effectively filters and discharges harmful substances inevitably generated during combustion of wood, so it is harmless to the human body, prevents air pollution, and provides a wood-fired boiler that does not impose any restrictions on indoor installation. There is a purpose to doing so.

The present invention is a means for achieving the above object, comprising: a combustion unit comprising a combustion space in which firewood is introduced and burned, and is provided with an upwardly extending flue; A heating unit that is in contact with the upper surface of the combustion unit and is heated by the heat of the combustion unit; and a purifier installed adjacent to the side of the combustion unit and connected to the top of the flue to purify the incoming combustion gas, wherein the purifier has a connection pipe connected to the flue on one side and a purifier on the other side. A housing in the form of a box in which an exhaust pipe for discharging combustion gas is formed; and a direct water tank disposed at the inner center of the housing, spaced a certain distance from the inner wall and lower surface of the housing, thereby forming a movement space for combustion gas, and receiving direct water supplied therein. The gas is condensed on the outer surface of the direct water tank, purified first, and then discharged through the discharge pipe.

In addition, a partition plate is installed in the moving space to divide the moving space into a descending space and an ascending space, and the lower portions of the descending space and the ascending space are configured to communicate with each other, and the combustion gas flowing into the connecting pipe is connected to the descending space and the ascending space. It is characterized by continuously passing through the rising space and then being discharged through the discharge pipe.

In addition, descending vanes for guiding the downward flow of combustion gas are installed in the descending space, and rising vanes for guiding the upward flow of combustion gas are installed in the rising space.

In addition, a condensate recovery tank is installed at the lower part of the housing to recover condensate that has condensed and fallen on the outer surface of the direct water tank.

In addition, the front of the housing is formed to be open, and a door member capable of opening and closing the open portion is installed, and the door member includes: a plate-shaped door panel rotatably coupled to the open portion of the housing through a hinge; A cleaning pipe installed on a side of the door panel facing the inside of the housing; and a plurality of cleaning spray nozzles installed on the piping of the cleaning pipe, wherein the cleaning pipe is connected to a condensate recovery container through a condensate transfer pipe, and the condensate recovery container is provided with recovered condensate toward the condensate transfer pipe. A condensate discharge pump is installed to pump the condensate, and the condensate recovered in the condensate recovery tank is supplied to the cleaning pipe and then sprayed onto the surface of the direct water tank through the cleaning spray nozzle.

The present invention has the following effects.

First, in addition to firewood, it is a structure that uses heated paraffin to raise the temperature. Paraffin releases latent heat and adds heat, thereby providing a heating effect, so that the operating water of the heating pipe and the hot water in the hot water tank are maintained in a certain section. The temperature rises or maintains the current water temperature, and even if the water temperature drops, it falls very slowly and with a delay. Therefore, even when the firewood is completely burned and does not generate heat, the temperature of the surrounding temperature, operating water, and hot water does not easily fall below the standard, and even when new firewood is ignited, the temperature can rise more quickly, increasing thermal efficiency. It seems effective.

Second, since harmful substances are not discharged to the outside from combustion gases, there is an advantage that indoor installation is possible.

Third, by treating the combustion gas using a water treatment method that comes into contact with water, it is more environmentally friendly and has the effect of improving the collection efficiency of hazardous substances.

Figure 1 is a diagram showing the front configuration of a wood-fired boiler according to the present invention.
FIG. 2 is a diagram showing a cross-sectional configuration based on line AA shown in FIG. 1.
FIG. 3 is a diagram showing a cross-sectional configuration based on line AA shown in FIG. 2.
Figure 4 is a diagram showing the plan configuration of the purification unit.
Figure 5 is a diagram showing a cross-sectional configuration based on line AA shown in Figure 4.
FIG. 6 is a diagram showing a cross-sectional configuration based on line AA shown in FIG. 5.
Figure 7 is a diagram showing the structure of a partition plate.
Figure 7 is a diagram showing a cross-sectional configuration based on line BB shown in Figure 5.
Figure 9 is a view showing a door member.
Figure 10 is a diagram showing a state in which the post-processing unit is combined.
Figure 11 is a diagram schematically showing the internal cross-sectional configuration of the post-processing unit.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those with average knowledge in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that identical members in each drawing may be indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that are judged to unnecessarily obscure the gist of the present invention are omitted.

As shown in Figures 1 to 3, a wood-fired boiler (hereinafter referred to as a wood-fired boiler) equipped with a combustion gas purification device according to the present invention largely consists of a combustion space 120 into which firewood is introduced and burned. A combustion unit 100 provided with an upwardly extending flue 130, a heating unit 200 that is in contact with the upper surface of the combustion unit 100 and heated by the heat of the combustion unit 100, and adjacent to the side of the combustion unit 100. It can be defined as including a purification unit 300 that is connected to the top of the flue 130 and purifies the incoming combustion gas.

The wood-fired boiler of the present invention has a combustion unit 100 located at the bottom, a heating unit 200 disposed thereon, and a purification unit 300 is disposed on the side, and the flue 130 of the combustion unit 100 and the purification unit ( By forming a structure in which 300 is connected, a structure is provided that allows combustion gas generated in the combustion unit 100 to be purified through the purification unit 300.

When firewood is put into the combustion unit 100 and burned, the heat is transferred to the heating unit 200 to heat the heating water and hot water for bathing, and the flue 130 leading to the upper part of the combustion unit 100 is purified. When connected to the unit 300, the combustion gas generated during combustion of firewood flows into the purification unit 300 and is then discharged to the outside through a purification process. The purification unit 300 is presented as a key feature of the present invention.

In addition, another feature is that the panel forming the frame wall of the combustion unit 100 and the heating unit 200 is filled with paraffin (P), so that the heat provided by the combustion unit 100 is stored and then gradually converted into latent heat to maximize the heat. It has a thermal efficiency of , and the accumulated latent heat is gradually released even after combustion is completed, allowing the heating effect to continue.

First, the combustion unit 100 includes a casing 110, a combustion space 120, a flue 130, and an opening/closing door 140.

The casing 110 forms the outer shape of the combustion unit 100 and is surrounded by a hexahedral wall, and is provided with a flue 130 extending upwardly to the top and an opening/closing door 140 on the side. In this case, the casing 110 ) The wall is composed of combustion panels 111 of a predetermined thickness.

A combustion space 120 is formed inside one side of the casing 110. When firewood (firewood) is put into the combustion space 120 and burned, the heat is transferred to the upper surface of the casing 110, and the combustion gas generated during combustion is transferred to the flue. Take (130) and exit.

The combustion unit 100 is equipped with a door 140 with a lever 142 on the front like a general wood boiler, and can be opened by turning the lever 142 in one direction, and after closing the door 140, the lever ( 142) can be turned in the other direction to lock the door 140.

In addition, the opening/closing door 140 is equipped with an air lock device 141 to control the amount of air inserted into the combustion unit 100, thereby controlling the thermal power. On one side of the opening/closing door 140, there is a gas discharge pipe 143 equipped with a detachable cap. This is provided and can be used to artificially discharge the gas generated in the combustion space 120.

In addition, the sweet potato box may be provided on one side of the casing 110, preferably on the side of the combustion unit 100, at a position that does not interfere with the opening/closing door 140, the heating unit 200, and the purifying unit 300. The enclosure 112 is a drawer type with a handle on the outside, an open upper surface, and a receiving space formed inside, and can be inserted into the combustion unit 100 from the outside of the combustion unit 100 and then removed from the outside of the combustion unit 100. As a structure, roasted sweet potatoes can be made by pulling out the sweet potato box to the outside of the combustion unit (100), putting sweet potatoes in the receiving space, and pushing them back into the combustion unit (100).

Inside the casing 110, the combustion space 120 may be divided into two parts by a diaphragm 150. In this case, fuel may be placed on one side of the combustion space 120 divided by the diaphragm 150. Let it happen.

The bottom of the diaphragm 150 is spaced at a certain height from the bottom of the casing 110 to allow the heat of the fuel ignited at the bottom to pass through, and the top of the diaphragm 150 allows combustion gases rising upward due to combustion to pass through. A passing hole 151 is formed to allow combustion gas to flow into the flue 130.

In particular, when using cylindrical log firewood fuel, relatively thin fuel with fast combustion characteristics is concentrated at the bottom, and fuel whose thickness (volume) gradually increases toward the top is stacked and arranged, and then placed at the bottom. When only the thin fuel located there is ignited, the relatively thin fuel begins to burn quickly, the generated heat can be transferred to the lower part of the diaphragm 150, and the combustion gas can be transferred to the flue 130 through the passage hole 151. there is.

At this time, as the fuel located below is carbonized, the fuel above descends layer by layer, and continuous ignition and combustion occurs according to heat transfer. Therefore, it has a structure that enables constant combustion for a long period of time, and in particular, it has a structure that allows continuous combustion for a long time of about 10 to 15 hours to maximize heating efficiency.

The heating unit 200 has a shape placed on the upper surface of one side of the combustion unit 100. The heating unit 200 is heated by the heat generated when firewood is burned in the combustion unit 100, and the wall of the heating unit 200 is also predetermined. It consists of a thick heating panel 210.

The heating panel 210 is a square or circular shape surrounding the heating panel 210 to form a space at the center, and a heated water tank 220 filled with hot water for bathing is provided at the center.

The outer surface of the heated water tank 220 is formed to a size corresponding to the inner surface of the heating panel 210, but is not formed to fit tightly, and the heated water tank 220 and the heating panel 210 form a predetermined gap. As it is configured to be in close contact, insertion and replacement of the heated hot water tank 220 is easy, and heat from the heating panel 210 can be transmitted without loss.

The heating panel 210 has a built-in heating pipe 211, and after tightly winding the heating panel 210 in a spiral shape, the upper and lower ends of each are exposed to the outside of the heating panel 210 and then connected to the pipe of the space to be heated. do.

In addition, a direct water discharge pipe 322, which will be described later, is connected to the heated hot water tank 220, so that preheated water can be supplied to the inside.

Meanwhile, the interior of the heating panel 210 and the combustion panel 111 may be filled with paraffin (P).

Paraffin (P) is a substance that changes phase into a solid or liquid depending on heat and is liquefied at the same time as it is heated. At this time, the combustion unit 100 and the heating unit 200 are maintained at a high temperature for a longer period of time due to the heated paraffin (P). In addition, paraffin (P) accumulates heat, and even after combustion is stopped or completed, when the temperature of paraffin (P) falls below the phase change range, it changes phase from liquid to solid and releases the accumulated latent heat. .

In other words, the paraffin (P) releases the stored latent heat without separate combustion and continuously warms the combustion unit 100 and the heating unit 200, so that the resulting heating effect can be provided for a long time.

Ultimately, when the wood is burned in the combustion space 120 and heat is generated, the combustion panel 111 of the combustion unit 100 and the heating panel 210 of the heating unit 200 are heated. The heating panel 210 is heated. As the temperature of the heating pipe 211 embedded in the heating panel 210 increases, heating is achieved by increasing the temperature of the heating water and supplying it. Additionally, as the heating panel 210 is heated, the heating pipe 211 surrounded by the heating panel 210 is heated. The heated hot water tank 220 is heated, thereby increasing the temperature of the water filled inside, and supplying it as bath hot water.

Meanwhile, the combustion unit 100 may be provided with a heating panel 121 protruding from the combustion space 120 in one or more layers.

The heating panel 121 protrudes inward from the wall of the casing 110 toward the combustion space 120, and is preferably formed on the path leading from the combustion space 120 to the flue 130 to allow the heat generated when the firewood is burned. It can be allowed to pass through the heating panel 121 and exit through the flue 130.

In this case, the heat used to heat the combustion unit 100 and the heating unit 200 can be discharged by heating the heating panel 121 rather than just being discharged to the flue 130.

Direct water stored in the direct water tank 320 of the purification unit 300, which will be described later, may flow through the heating panel 121. Accordingly, a portion of the direct water stored in the direct water tank 320 passes through the heat of the combustion unit 100. Partial heating may be effected.

Next, the purification unit 300 separates and removes various harmful condensable moisture or fine dust contained in the combustion gas generated by combustion as condensate through a condensation method according to cooling, and removes chemicals such as catalysts or filters. By not using wasteful purification means such as these, a more environmentally friendly purification process is possible, and high purification efficiency can be expected.

To this end, the purification unit 300 can be largely defined as including a housing 310 and a direct water tank 320.

The housing 310 constitutes the overall appearance of the purification unit 300, and has a connection pipe 311 connected to the flue 130 on one side and an exhaust pipe 312 for discharging combustion gas on the other side. It consists of a structure that is formed in the form of a box.

That is, the combustion gas rising through the flue 130 can be introduced into the housing 310 through the connection pipe 311, and the residual combustion gas after the condensation reaction within the housing 310 is discharged into the housing through the discharge pipe 312. (310) Can be discharged to the outside.

The connection pipe 311 and the discharge pipe 312 are formed to be biased toward the top of the housing 310, so that the combustion gas flowing into the housing 310 through the connection pipe 311 descends inside the housing 310. , then rises again and is sufficiently moored within the housing 310 so that it can be discharged through the discharge pipe 312.

Next, the direct water tank 320 is disposed at the inner center of the housing 310, and is configured to receive direct water inside, so that the outer surface can be maintained at a relatively low temperature, and is configured to maintain a relatively low temperature state of the combustion gas generated due to combustion. Assuming the temperature is at least 100 degrees, when this high-temperature combustion gas flows into the housing 310 and comes into contact with the outer surface of the direct water tank 320, it condenses on the cold outer surface of the direct water tank 320 to generate condensate.

In the condensate generated in this way, various particulate harmful substances contained in the combustion gas can be dissociated and separated from the combustion gas, so that the combustion gas can be purified by condensation and then discharged.

At this time, the direct water tank 320 is spaced a certain distance from the inner wall and lower surface of the housing 310, thereby forming a movement space for combustion gas between the inner wall and the lower surface of the housing 310.

That is, the combustion gas flowing into the housing 310 through the connection pipe 311 flows into the moving space, while the combustion gas flowing into the moving space is condensed on the outer surface of the direct water tank 320 and is first purified. A structure is provided to discharge through the discharge pipe 312.

In the case of the residual combustion gas after the condensation reaction, it exits the housing 310 in a state where it has been cooled to a sufficient temperature, and the combustion gas that has been purified in this way is introduced into the post-processing unit 400, which will be described later, and purified again. It may be released into the atmosphere.

In addition, in the case of direct water stored in the direct water tank 320, it can be preheated by heat exchange with combustion gas, and the preheated direct water is supplied to the heated hot water tank 220 described above.

More specifically, the direct water tank 320 is a cylindrical structure that allows combustion gas contact to be induced more effectively on the outer surface, and a direct water supply pipe 321 for supplying direct water is directly connected to the bottom, which is necessary. Ensure that direct water is supplied internally.

At the top of the direct water tank 320, a direct water discharge pipe 322 connecting the heated hot water tank 220 and the direct water tank 320 is directly connected. Although not shown, the direct water stored in the direct water tank 320 is discharged from the direct water tank 320. A pump is provided for pumping the water to the heated hot water tank 220 through the pipe 322, so that the direct water preheated in the direct water tank 320 can be supplied toward the heated hot water tank 220.

Accordingly, since preheated water is supplied to the heated hot water tank 220 and heated, the water can be heated and used faster than the target temperature.

A safety valve 323 is provided at the top of the direct water tank 320, so that when an internal pressure abnormality occurs, the inside of the sealed direct water tank 320 is opened to solve the problem.

Meanwhile, a partition plate 330 may be installed in the moving space to divide the moving space into a lowering space (a1) and an upper space (a2).

By the partition plate 330, based on the direction shown in FIG. 6, a descending space (a1) can be formed on the left and an ascending space (a2) can be formed on the right.

The partition plate 330 may have an 'ㄱ'-shaped bent structure between the inner surface of the housing 310 and the outer surface of the direct water tank 320. In this case, the upper end of the partition plate 330 is at least connected to the connection pipe 311. ) to prevent the upward movement of the combustion gas flowing into the lowering space (a1) through the connection pipe 311, and the lower end is extended only to the bottom of the direct water tank 320 to lower the lower space (a1). ) and the lower part of the rising space (a2) are communicated with each other so that the combustion gas that has moved to the lower part of the falling space (a1) can flow into the rising space (a2).

That is, the combustion gas flowing into the housing 310 through the connection pipe 311 passes through the descending space (a1) and the rising space (a2) in succession and is discharged to the discharge pipe 312, while being discharged to the direct water tank ( 320) It has sufficient contact area and contact time on the outer surface and can be condensed.

At this time, a lowering vane 340 is installed in the lowering space (a1) to guide the lower flow of combustion gas, and a rising vane 350 to induce an upper flow of combustion gas is installed in the rising space (a2). This ensures that combustion gases flowing into the moving space can move smoothly.

The lowering vane 340 and the rising vane 350 are each fixedly installed on the inner surface of the housing 310. In particular, the lowering vane 340 has a plate-shaped structure with the end inclined downward, and the rising vane 350 On the contrary, is a plate-shaped structure with an end inclined upward, and may have a structure spirally wrapped along the inner surface of the housing 310.

Accordingly, the combustion gas flowing into the descending space (a1) is guided to the descending vane 340 and moves downward, forming a descending airflow, while the combustion gas flowing into the rising space (a2) is guided by the rising vane 350. It forms an upward air current and moves upward, contacting the outer surface of the direct water tank 320 over a larger area for a longer period of time, and has a structure in which the condensation reaction can be performed more effectively.

In some cases, for the purpose of replacing the lowering vane 340 and the rising vane 350, a suction fan 480 may be installed inside the housing 310 to forcibly blow combustion gas.

Meanwhile, a condensate water recovery tank 360 may be installed at the lower part of the housing 310 to recover condensate that has condensed and fallen on the outer surface of the direct water tank 320.

Accordingly, the condensed water that condenses on the surface of the direct water tank 320 and then freely falls from the direct water tank 320 can be recovered and treated in the condensate water recovery tank 360 disposed directly below the direct water tank 320.

At this time, a recovery hole 361 for passing condensate may be formed through the upper surface of the condensate water recovery tank 360, and the direct water tank 320 may be formed at a certain level on the upper surface of the condensate water recovery tank 360. It can be installed spaced apart from the upper part of the condensate water recovery tank 360 through the support legs 324 that support the height.

If necessary, the upper surface of the condensate water recovery tank 360 is inclined at a certain angle toward the recovery hole 361 so that condensate water can be collected through the recovery hole 361 by its own weight.

On the other hand, if the condensate condensed on the outer surface fails to fall due to its own weight, and remains for a long time, mold grows. Additionally, if the condensate is evaporated as is from the surface of the direct water tank 320, various particulate matter contained in the condensate This adheres to the direct water tank 320, and if this phenomenon worsens, the heat exchange function is not effectively achieved due to the irregular foreign matter film formed on the surface of the direct water tank 320, and condensation efficiency is significantly reduced.

Accordingly, in consideration of the ease of cleaning or maintenance of the direct water tank 320, the front of the housing 310 is formed open, and a door member 370 that can open and close the inside of the housing 310 is installed in the open area, This ensures workability such as cleaning and maintenance of the direct water tank 320 sealed within the housing 310.

In particular, rather than allowing workers to directly enter the open housing 310 to clean the direct water tank 320, wet cleaning of the direct water tank 320 is possible even in a sealed state without separately opening the door member 370. This can be said to be the main feature of the door member 370.

To this end, the door member 370 may be largely illustrated as including a door panel 371, a cleaning pipe 372, and a cleaning spray nozzle 373.

The door panel 371 is a plate-shaped structure with an area large enough to cover the open front of the housing 310, and is rotatably coupled to the open portion of the housing 310 through a hinge (H) to perform opening and closing operations. You can.

A handle for operating the door panel 371 may be provided on the front of the door panel 371, and a direct water supply pipe 321 and a condensate transfer pipe 374, which will be described later, penetrate into the lower part of the housing 310. Can be piped in either direction.

The cleaning pipe 372 is fixedly installed on the surface of the door panel 371 facing the inside of the housing 310 and is provided in a wave-shaped structure over the entire area of the door panel 371. Washing water may flow through the cleaning pipe 372.

The cleaning spray nozzle 373 is installed on the duct of the cleaning pipe 372, and a plurality of cleaning spray nozzles may be installed at equal intervals.

The cleaning spray nozzle 373 is configured to spray the washing water flowing through the cleaning pipe 372 toward the direct water tank 320. When the door panel 371 is in a state of closing the open portion of the housing 310, By being arranged to face the direct water tank 320, washing water can be sprayed toward the direct water tank 320.

At this time, condensate recovered in the condensate water recovery tank 360 is preferably used as washing water for cleaning the surface of the direct water tank 320.

In other words, the recovered condensate is not immediately discarded, but is recycled for cleaning the direct water tank 320, thereby minimizing unnecessary waste of resources.

For this purpose, the cleaning pipe 372 may be connected to the condensate water recovery container 360 through the condensate transfer pipe 374, and the recovered condensate may be directed to the condensate transfer pipe 374 in the condensate recovery container 360. It is equipped with a structure in which a condensate discharge pump (375) for pressure delivery is installed.

In other words, the cleaning pipe 372 and the condensate recovery container 360 are connected to each other, and the condensate recovered in the condensate recovery container 360 is supplied to the cleaning pipe 372 and then to the cleaning spray nozzle ( It can be sprayed onto the surface of the direct water tank 320 as washing water through 373).

In addition, the washing water sprayed in this way has a circulation structure in which foreign substances on the surface of the direct water tank 320 are removed by spraying pressure, and then, like condensate, it falls freely and is recovered in the condensate recovery tank 360.

Accordingly, the worker can replace the condensate with new one, considering the degree of contamination of the condensate recovered in the condensate water recovery container 360.

In this structure, the combustion gas that has undergone primary purification may flow into the post-processing unit 400 connected to the discharge pipe 312, undergo secondary purification, and then be discharged into the atmosphere.

In particular, the post-processing unit 400 treats the combustion gas using a water treatment method, more specifically, spraying water on the combustion gas to remove various harmful substances contained in the combustion gas.

Typically, combustion gas contains a large amount of representative gaseous substances that cause air pollution, such as nitrogen oxides, hydrocarbons, and carbon monoxide. At the same time, it also contains particulate matter (PM), so if the combustion gas is discharged into the atmosphere as is, Pollution problems arise, which also makes it difficult for wood-fired heating devices to be used indoors.

Accordingly, in this embodiment, the combustion gas generated during the combustion process is not discharged as is, but is purified in primary and secondary stages, thereby providing a structure that is environmentally friendly and allows the heating device to be used indoors without difficulty.

More specifically, as shown in FIG. 11, the post-processing unit 400 is shaped like a box, and path plates 411 are formed alternately on the inner upper and lower surfaces to form a zigzag-shaped movement path in the inner space, and A purification box 410 in which an discharge port 412 through which combustion gas passing through the movement path is discharged is formed, an upper chamber 420 installed on the upper part of the purification box 410 and storing a certain amount of water, the upper A plurality of rain nozzles 430 connected to the chamber 420 and spraying water stored in the upper chamber 420 through the upper surface of the purification box 410 to the moving path of the purification box 410, the purification box A lower chamber 440 installed at the lower part of 410, which is formed with a connector 441 connected to the discharge pipe 312 and into which a certain amount of water is stored, and a circulation pump built into the lower chamber 440 ( 450), a water level detection module 460 built into the lower chamber 440 and controlling the operation of the circulation pump 450 according to the level of water stored in the lower chamber 440, and the circulation pump 450 and the upper chamber The chamber pipe 470 connecting the 420 and the suction fan ( 480).

Due to this structure, when combustion gas flows into the lower chamber 440 through the discharge pipe 312 as shown in the two-dot chain line in FIG. 10, the introduced combustion gas is forcibly sucked upward by the suction fan 480 and moves. While being moved to the path entrance end (e1), it circulates inside the purification box 410 along a zigzag-shaped movement path inside the purification box 410. At this time, the lane moves from the top of the purification box 410 to the bottom. Since the nozzle 430 sprays water, various harmful substances contained in the combustion gas may freely fall to the inner lower surface of the purification box 410 together with the water.

At this time, the combustion gas has a long residence time inside the purification box 410 along a zigzag-shaped movement path, so the contact time with the water sprayed from the rain nozzle 430 increases, and the sprayed water is connected to the combustion gas and heat. lowers the temperature to some extent.

The sprayed water freely falls into the lower chamber 440 below the purification box 410 through the inlet end (e1) of the movement path provided on the lower surface of the purification box 410 and is stored in the lower chamber 440.

Meanwhile, the circulation pump 450 pumps the water stored in the lower chamber 440 to the upper chamber 420 through the chamber pipe 470, thereby transferring the water consumed by the rain nozzle 430 to the upper chamber 420. It can be recharged.

At this time, the circulation pump 450 may be operated under the control of the water level detection module 460. For example, when the water level detection module 460 detects that the level of water stored in the lower chamber 440 is above a certain level, the pump is operated. By operating it, the water stored in the lower chamber 440 can be pumped to the upper chamber 420 to fill the upper chamber 420 with water.

The water level detection module 460 may include a water level sensor that detects the water level of the lower chamber 440 and a control unit that controls the operation of the circulation pump 450 based on the detection result of the water level sensor.

Accordingly, when the rain nozzle 430 sprays the water stored in the upper chamber 420 into the moving path of the purification box 410, the sprayed water comes into contact with the combustion gas moving along the moving path and removes the water contained in the combustion gas. After collecting the hazardous substances, they freely fall back into the lower chamber 440, and the water stored in the lower chamber 440 has a circulation structure where it is supplied to the upper chamber 420 again.

In other words, the water supply structure is simplified by circulating water in the upper chamber 420 and the lower chamber 440 and using it to purify combustion gas, without the need to provide a separate means for supplying water for purification of combustion gas. At the same time, since water is not used once and then discarded, unnecessary waste of water can be prevented and the purification function of water can be utilized to the fullest extent.

Depending on the situation, if the contamination level of the water exceeds an appropriate level, the user can drain all the water and replace it with new water.

Combustion gas moved to the outlet end (e2) of the zigzag-shaped movement path may be discharged to the outside through the discharge port 412 connected to the exit end (e2) of the movement path.

Meanwhile, the discharge port 412 may communicate not only with the outlet end e2 but also with the interior of the lower chamber 440. Accordingly, when the suction fan 480 is not operated, the combustion gas is directly discharged from the discharge port. It may be bypassed at (412) and discharged to the outside. In other words, in cases where secondary purification treatment of the combustion gas is not necessary, it is revealed that the combustion gas can be discharged directly without water treatment.

The embodiments of the present invention described above are merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims. In addition, the present invention should be understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims.

100: Combustion unit
200: heating unit
300: Purification department

Claims (5)

A combustion section comprising a combustion space in which firewood is introduced and burned, and which is provided with an upwardly extending flue;
A heating unit that is in contact with the upper surface of the combustion unit and is heated by the heat of the combustion unit; and
It includes a purification unit installed adjacent to the side of the combustion unit and connected to the top of the flue to purify the incoming combustion gas,
The purification department,
A housing in the form of a box in which a connecting pipe connected to the flue is formed on one side and an exhaust pipe for discharging combustion gas is formed on the other side; and
A direct water tank is disposed at the inner center of the housing and is spaced a certain distance from the inner wall and lower surface of the housing to form a movement space for combustion gas, and receives direct water supplied to the interior,
A wood-fired boiler equipped with a combustion gas purification device, characterized in that the combustion gas flowing into the moving space is condensed on the outer surface of the direct water tank, purified first, and then discharged through the discharge pipe. In claim 1,
A partition plate is installed in the moving space to divide the moving space into a descending space and an ascending space, and the lower portions of the descending space and the ascending space are configured to communicate with each other,
A wood-burning boiler equipped with a combustion gas purification device, characterized in that the combustion gas flowing into the connection pipe passes through the descending space and the rising space in succession and is then discharged through the discharge pipe. In claim 2,
A wood-fired boiler equipped with a combustion gas purification device, characterized in that a descending vane to induce a downward flow of combustion gas is installed in the descending space, and an upward vane to induce an upper flow of combustion gas is installed in the upward space. In claim 1,
A wood-fired boiler equipped with a combustion gas purification device, characterized in that a condensate recovery tank is installed at the lower part of the housing to recover condensate that has condensed and fallen on the outer surface of the direct water tank. In claim 4,
The front of the housing is open, and a door member that can open and close the open portion is installed,
The door member is,
A plate-shaped door panel rotatably coupled to the open portion of the housing through a hinge;
A cleaning pipe installed on a side of the door panel facing the inside of the housing; and
It includes a plurality of cleaning spray nozzles installed on the duct of the cleaning pipe,
The cleaning pipe is connected to the condensate recovery tank through a condensate transfer pipe,
A condensate discharge pump is installed in the condensate recovery container to pump the recovered condensate toward the condensate transfer pipe. The condensate recovered in the condensate recovery container is supplied to the cleaning pipe and then to the surface of the direct water tank through the cleaning spray nozzle. A wood-fired boiler equipped with a combustion gas purification device characterized in that it is sprayed.

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