CA1144018A - Hot-water boiler with firewoods - Google Patents
Hot-water boiler with firewoodsInfo
- Publication number
- CA1144018A CA1144018A CA000348494A CA348494A CA1144018A CA 1144018 A CA1144018 A CA 1144018A CA 000348494 A CA000348494 A CA 000348494A CA 348494 A CA348494 A CA 348494A CA 1144018 A CA1144018 A CA 1144018A
- Authority
- CA
- Canada
- Prior art keywords
- flue
- water
- boiler
- hot
- boiler body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ABSTRACT OF THE DISCLOSURE
A wood fired type hot-water boiler comprising a boiler body having a feed-water inlet and a hot-water outlet, a water storage chamber and a combustion chamber mounted respectively in the upper and lower portions inside the boiler body and a plurality of fire tubes connected respectively with the com-bustion chamber at an upper portion thereof and with a smoke box formed at the lower end of a flue which is allowed to pro-trude toward the outside penetrating both the water storage chamber and the upper end of the boiler body at an upper por-tion thereof, characterized in that the hot-water boiler com-prises a first damper in the flue for controlling the amount of ventilation through the flue; an auxiliary flue having a smaller diameter than that of the flue, protruding outwardly from the boiler body and interconnected to the combustion chamber; and a second damper in the auxiliary flue.
A wood fired type hot-water boiler comprising a boiler body having a feed-water inlet and a hot-water outlet, a water storage chamber and a combustion chamber mounted respectively in the upper and lower portions inside the boiler body and a plurality of fire tubes connected respectively with the com-bustion chamber at an upper portion thereof and with a smoke box formed at the lower end of a flue which is allowed to pro-trude toward the outside penetrating both the water storage chamber and the upper end of the boiler body at an upper por-tion thereof, characterized in that the hot-water boiler com-prises a first damper in the flue for controlling the amount of ventilation through the flue; an auxiliary flue having a smaller diameter than that of the flue, protruding outwardly from the boiler body and interconnected to the combustion chamber; and a second damper in the auxiliary flue.
Description
~4~
The present invention relates to wood fired type hot-water boilers. There has heretofore been utilized wood fired hot-water boilers, as discussed in detail hereinafter for supplying hot-water to a bathroom and a kitchen, etc.
~ ccording to the present invention, there is pro-vided an improved heating method and boiler to that of the prior art. Such improvements involve substantial energy savings since more effective utilization of energy from the fuel is obtained. Such stems from increasing the heat trans-fer areas of the boiler also providing better fuel combustion in the combustion chamber together with increasing the amount of water stored in the associated water storage chamber in-side the boiler body and further, providing the possibility of using paper scraps and combustible trash etc. as fuels.
In the case of the known boilers, when fuel such as firewood, paper scraps, wood and combustible trash are or become poor, or when the heat energy from burning out of the fuel is weak, and after burning out, the outdoor air flows into the ventilation flue comprising the combustion chamber, numerous fire tubes, smoke box and flue thereof. Thus, more n~merous fire tubes must be utilized in order to increase the transfer effect. Such however results in a further drawback in that there is provided more coolin~ effect because the number of fire tubes are increased. Furthermore, closing the flue thereof to prevent the outdoor air flow causes in-complete fuel combustion because the fuel combustion for keeping warmth is impossible when the flue is closed, be-fore the burning out of the fuel in order prevent the cooling.
It is therefore a prime object of the present in-vention to provide a wood fired hot-water boiler which over-comes t~e aforementioned disadvantages, including, to provide an arrangement wherein heat consumption from a boiler is t~
kept at a minimum and which enables combustion for keeping warmth and the complete combustion of the fuel, including utilizing combustible trash, such being a poor fuel, weak in fire power, and maintaining combustion until the burning out of the fuel, where low or little quantity of heat in fuels after burning out in the combustion chamber is present, also having large heat transfer areas and having large water storage capacity.
In one aspect of the present invention there is provided a wood fired type hot-water boiler comprising a boiler body having a feed-water inlet and a hot-water out-let, a water storage chamber and a combustion chamber mounted ~ respectively in the upper and lower portions inside the i boiler body and a plurality of fire tubes connected respec-tively with the combustion chamber at an upper portion thereof and with a smoke box formed at the lower end of a flue which . is allowed to protrude toward the outside penetrating both the water storage chamber and the upper end of the boiler body at an upper portion thereof, characterize~ in that the hot-water boiler comprises a first damper in the flue for controlling the amount of ventilation through the flue; an . auxiliary flue having a smaller diameter than that of the flue, protruding outwardly from the boiler body and inter-connected to the combustion chamber, and a second damper in the auxiliary flue.
The invention is illustrated by way of example in the accompanying drawings wherein:
Figure 1 is a sectional elevational view of a wood fired hot-water boiler in accordance with the prior art, prior to modification in accordance with the present invention;
: Figure 2 is a sectional elevational view of a wood fired hot-water boiler in accordance with the present inven-tion;
~J
Figure 3 is a sectional elevational view of the boiler shown in Figure 2 including further modification.
The invention will become more apparent following reference to the drawings and the description hereinafter.
Referring now to the prior art wood fired hot- -water boiler shown in Figure 1. ~umeral 1 represents a boiler adapted to receive feed-water into a water storage chamber 5 formed inside the boiler body 2, the feed-water being received through feed pipe 4 connected to a feed-water opening 3 formed penetrating through side wall 2b of the cylinder-like, boiler body 2. Furthermore, at one end of feed pipe 4 is a cistern tank 6 having a float valve therein and boiler body 2 further having a hot-water suppl~ing opening 7 for feeding hot-water heated in the storage chamber 5 in the boiler body 2 to a .~
bathroom and kitchen etc. A drain valve 8 and an expansion tube for pressure control 9 etc. are also provided for the boiler body 2 as is conventionally known, thus detailed ex-planation of these features is omitted.
Furthermore, at the lower portion of the boiler body 2, an ash receiving part 11 having an ash removing open- -ing 10 is provided and at the upper end of said ash re~eiving part 11, a flange 12 is formed whereby a grate is supported thereon. Above grate 13 there is provided a combustion chamber 15 defined by an upper wall 15a and side walls 15b thus providing the lower portion of said storage chamber 5.
A fire door 16 is provided penetrating through the side wall 15b of combustion chamber 15 and the side wall 2b of the boiler body 2, corresponding to the side wall 15b respect-ively so that such fuels as wood, paper, scraps, combustible trash etc. may be fed therethrough. Further, there is pro-vided a plurality of passages 17 which are perforated through the upper wall 15a, passages 17 being inserted into respect-.
L4~8 ively one end of the numerous water sealed fire tubes 18.
At the other ends of the numerous fire tubes 18, a smoke box 1~ is formed in the lower portion of flue 20. Furthermore, flue 20 is adapted to protrude outwardly, penetrating the upper wall 2a of the boiler body 2. Therefore, the combustion gas and the air etc. generated in the combustion chamber are exhausted to the outdoors via the ventilation flue, compris-ing combustion chambex 15, the numerous fire tubes 18, smoke box 19 and flue 20 in that order.
In Figure 2 there is shown the outline of a wood -fired hot-water boiler 51 in accordance with the present invention. Detailed description has been omitted since as will be realized, marking the same numbers as the correspond-ing portions to the Figure 1, said Figure 2 has the common features with Figure 1 except for the following points, noked in Figure 2.
A first damper 52 secured so as to be able to open or to close to an appropriate position of the flue 20 protruding through the upper wall 2a of boiler body 2 against the oppo-site side of the smoke box 19 of the flue 20.
An auxiliary flue 54 extends upperwards along the side wall 2b of said boiler body 2 connected outside thereof with said combustion chamber 15 penetrating the side wall 2b of said boiler body 2 and the outside wall 15b of said com-bustion chamber 15 respectively therethrough, and a second damper 55 secured adjacent the upper end of said auxiliary flue 54 so as to be able to close or to open easily, said auxiliary flue 54 having a smaller diameter than that of said flue 20.
Figure 2 thus discloses, by way of example, a wood fired boiler according to the present invention. With the features shown in Figure 2, it is possible that when the hot~
D
water boiler 51 is stoked, the fuels containing the combusti-ble trash etc. are commenced to burn in a state of opening the first damper 52 and closing the second damper 55 or opening the ventilation flue consisting of the combustion chamber 15, plurality of fire tubes 18, smoke box 19 and flue 20 is utilized, then during the period from becoming poor in fuels to burning out of it, said second damper 55 is held in open position while the first damper is closed and the ventila-tion flue consists of the combustion chamber 15, auxiliary fire tubes (not shown) and a~Yiliary flue 54 is utilized, be-~ ing allowed to close the ventilation flue including said plur-; ality of fire tubes 18 and further when the combustion is ended, said second damper 55 is adapt~d so as to be in a closed state. - -Therefore, according to the present invention the amount of heat loss from the fire tubes and the flue can be controlled to a minimum when the fuel becomes poor or the fire power is weak during the period until the fuel is burnt out, and after the burning out of the fuel. Furthermore, since the combustion of the fuel for keeping warmth is the complete use of the fuel, and the use of combustible trash as fuels are possible, various beneficial effects are obtained including energy saving and prevention of environmental contamination.
Furthermore, the present invention is not limited to the example described above since the auxiliary flue 54 ~ay be attached at various alternative locations on the way up the flue 20 The main point is that the air from the combus-tion chamber 15 can only be allowed to exhaust outwards through the auxiliary flue. Furthermore, the construction of the b~iler may be modified to remove the attached portion of flange 12 with grate 13 and the curved area of the combustion chamber shown in Figure 1 and Figure 2 to that illustrated in Figure 3 thereby making it possible to simpli~y the construc-tion and reduce overheat damage of the boiler body.
The present invention relates to wood fired type hot-water boilers. There has heretofore been utilized wood fired hot-water boilers, as discussed in detail hereinafter for supplying hot-water to a bathroom and a kitchen, etc.
~ ccording to the present invention, there is pro-vided an improved heating method and boiler to that of the prior art. Such improvements involve substantial energy savings since more effective utilization of energy from the fuel is obtained. Such stems from increasing the heat trans-fer areas of the boiler also providing better fuel combustion in the combustion chamber together with increasing the amount of water stored in the associated water storage chamber in-side the boiler body and further, providing the possibility of using paper scraps and combustible trash etc. as fuels.
In the case of the known boilers, when fuel such as firewood, paper scraps, wood and combustible trash are or become poor, or when the heat energy from burning out of the fuel is weak, and after burning out, the outdoor air flows into the ventilation flue comprising the combustion chamber, numerous fire tubes, smoke box and flue thereof. Thus, more n~merous fire tubes must be utilized in order to increase the transfer effect. Such however results in a further drawback in that there is provided more coolin~ effect because the number of fire tubes are increased. Furthermore, closing the flue thereof to prevent the outdoor air flow causes in-complete fuel combustion because the fuel combustion for keeping warmth is impossible when the flue is closed, be-fore the burning out of the fuel in order prevent the cooling.
It is therefore a prime object of the present in-vention to provide a wood fired hot-water boiler which over-comes t~e aforementioned disadvantages, including, to provide an arrangement wherein heat consumption from a boiler is t~
kept at a minimum and which enables combustion for keeping warmth and the complete combustion of the fuel, including utilizing combustible trash, such being a poor fuel, weak in fire power, and maintaining combustion until the burning out of the fuel, where low or little quantity of heat in fuels after burning out in the combustion chamber is present, also having large heat transfer areas and having large water storage capacity.
In one aspect of the present invention there is provided a wood fired type hot-water boiler comprising a boiler body having a feed-water inlet and a hot-water out-let, a water storage chamber and a combustion chamber mounted ~ respectively in the upper and lower portions inside the i boiler body and a plurality of fire tubes connected respec-tively with the combustion chamber at an upper portion thereof and with a smoke box formed at the lower end of a flue which . is allowed to protrude toward the outside penetrating both the water storage chamber and the upper end of the boiler body at an upper portion thereof, characterize~ in that the hot-water boiler comprises a first damper in the flue for controlling the amount of ventilation through the flue; an . auxiliary flue having a smaller diameter than that of the flue, protruding outwardly from the boiler body and inter-connected to the combustion chamber, and a second damper in the auxiliary flue.
The invention is illustrated by way of example in the accompanying drawings wherein:
Figure 1 is a sectional elevational view of a wood fired hot-water boiler in accordance with the prior art, prior to modification in accordance with the present invention;
: Figure 2 is a sectional elevational view of a wood fired hot-water boiler in accordance with the present inven-tion;
~J
Figure 3 is a sectional elevational view of the boiler shown in Figure 2 including further modification.
The invention will become more apparent following reference to the drawings and the description hereinafter.
Referring now to the prior art wood fired hot- -water boiler shown in Figure 1. ~umeral 1 represents a boiler adapted to receive feed-water into a water storage chamber 5 formed inside the boiler body 2, the feed-water being received through feed pipe 4 connected to a feed-water opening 3 formed penetrating through side wall 2b of the cylinder-like, boiler body 2. Furthermore, at one end of feed pipe 4 is a cistern tank 6 having a float valve therein and boiler body 2 further having a hot-water suppl~ing opening 7 for feeding hot-water heated in the storage chamber 5 in the boiler body 2 to a .~
bathroom and kitchen etc. A drain valve 8 and an expansion tube for pressure control 9 etc. are also provided for the boiler body 2 as is conventionally known, thus detailed ex-planation of these features is omitted.
Furthermore, at the lower portion of the boiler body 2, an ash receiving part 11 having an ash removing open- -ing 10 is provided and at the upper end of said ash re~eiving part 11, a flange 12 is formed whereby a grate is supported thereon. Above grate 13 there is provided a combustion chamber 15 defined by an upper wall 15a and side walls 15b thus providing the lower portion of said storage chamber 5.
A fire door 16 is provided penetrating through the side wall 15b of combustion chamber 15 and the side wall 2b of the boiler body 2, corresponding to the side wall 15b respect-ively so that such fuels as wood, paper, scraps, combustible trash etc. may be fed therethrough. Further, there is pro-vided a plurality of passages 17 which are perforated through the upper wall 15a, passages 17 being inserted into respect-.
L4~8 ively one end of the numerous water sealed fire tubes 18.
At the other ends of the numerous fire tubes 18, a smoke box 1~ is formed in the lower portion of flue 20. Furthermore, flue 20 is adapted to protrude outwardly, penetrating the upper wall 2a of the boiler body 2. Therefore, the combustion gas and the air etc. generated in the combustion chamber are exhausted to the outdoors via the ventilation flue, compris-ing combustion chambex 15, the numerous fire tubes 18, smoke box 19 and flue 20 in that order.
In Figure 2 there is shown the outline of a wood -fired hot-water boiler 51 in accordance with the present invention. Detailed description has been omitted since as will be realized, marking the same numbers as the correspond-ing portions to the Figure 1, said Figure 2 has the common features with Figure 1 except for the following points, noked in Figure 2.
A first damper 52 secured so as to be able to open or to close to an appropriate position of the flue 20 protruding through the upper wall 2a of boiler body 2 against the oppo-site side of the smoke box 19 of the flue 20.
An auxiliary flue 54 extends upperwards along the side wall 2b of said boiler body 2 connected outside thereof with said combustion chamber 15 penetrating the side wall 2b of said boiler body 2 and the outside wall 15b of said com-bustion chamber 15 respectively therethrough, and a second damper 55 secured adjacent the upper end of said auxiliary flue 54 so as to be able to close or to open easily, said auxiliary flue 54 having a smaller diameter than that of said flue 20.
Figure 2 thus discloses, by way of example, a wood fired boiler according to the present invention. With the features shown in Figure 2, it is possible that when the hot~
D
water boiler 51 is stoked, the fuels containing the combusti-ble trash etc. are commenced to burn in a state of opening the first damper 52 and closing the second damper 55 or opening the ventilation flue consisting of the combustion chamber 15, plurality of fire tubes 18, smoke box 19 and flue 20 is utilized, then during the period from becoming poor in fuels to burning out of it, said second damper 55 is held in open position while the first damper is closed and the ventila-tion flue consists of the combustion chamber 15, auxiliary fire tubes (not shown) and a~Yiliary flue 54 is utilized, be-~ ing allowed to close the ventilation flue including said plur-; ality of fire tubes 18 and further when the combustion is ended, said second damper 55 is adapt~d so as to be in a closed state. - -Therefore, according to the present invention the amount of heat loss from the fire tubes and the flue can be controlled to a minimum when the fuel becomes poor or the fire power is weak during the period until the fuel is burnt out, and after the burning out of the fuel. Furthermore, since the combustion of the fuel for keeping warmth is the complete use of the fuel, and the use of combustible trash as fuels are possible, various beneficial effects are obtained including energy saving and prevention of environmental contamination.
Furthermore, the present invention is not limited to the example described above since the auxiliary flue 54 ~ay be attached at various alternative locations on the way up the flue 20 The main point is that the air from the combus-tion chamber 15 can only be allowed to exhaust outwards through the auxiliary flue. Furthermore, the construction of the b~iler may be modified to remove the attached portion of flange 12 with grate 13 and the curved area of the combustion chamber shown in Figure 1 and Figure 2 to that illustrated in Figure 3 thereby making it possible to simpli~y the construc-tion and reduce overheat damage of the boiler body.
Claims (3)
1. A wood fired type hot-water boiler comprising a boiler body having a feed-water inlet and a hot-water outlet, a water storage chamber and a combustion chamber mounted respectively in the upper and lower portions inside the boiler body and a plurality of fire tubes connected respectively with the com-bustion chamber at an upper portion thereof and with a smoke box formed at the lower end of a flue which is allowed to pro-trude toward the outside penetrating both the water storage chamber and the upper end of the boiler body at an upper por-tion thereof, characterized in that the hot-water boiler com-prises a first damper in the flue for controlling the amount of ventilation through the flue; an auxiliary flue having a smaller diameter than that of the flue, protruding outwardly from the boiler body and interconnected to the combustion chamber, and a second damper in the auxiliary flue.
2. A hot-water boiler in accordance with claim 1, wherein said auxiliary flue is interconnected indirectly to said com-bustion chamber.
3. A hot-water boiler in accordance with claim 1, wherein said combustion chamber is extended to the bottom surface of the boiler body and includes a grating and mounting therefore inside said combustion chamber remote from the boiler body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000348494A CA1144018A (en) | 1980-03-26 | 1980-03-26 | Hot-water boiler with firewoods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000348494A CA1144018A (en) | 1980-03-26 | 1980-03-26 | Hot-water boiler with firewoods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1144018A true CA1144018A (en) | 1983-04-05 |
Family
ID=4116567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000348494A Expired CA1144018A (en) | 1980-03-26 | 1980-03-26 | Hot-water boiler with firewoods |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1144018A (en) |
-
1980
- 1980-03-26 CA CA000348494A patent/CA1144018A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |