GB2160309A

GB2160309A - Boiler

Info

Publication number: GB2160309A
Application number: GB8413111A
Authority: GB
Inventors: Geoffrey Asprey
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-05-22
Filing date: 1984-05-22
Publication date: 1985-12-18
Also published as: GB8413111D0

Abstract

A closed boiler with an arrangement of chimneys 10,11 to slow down combustion but still be able to introduce more air to the combustion chamber 15 without fierce combustion. Chimney 10 at the top of the boiler returns to the area underneath the firebed 16, and chimney 11 exhausts to the atmosphere. The arrangement ensures that volatiles not fully burnt are returned to the firebed, and provides greater heat transfer at higher temperatures for less fuel. <IMAGE>

Description

SPECIFICATION Siamese chimney Improvement to combustion of fossil and solid fuels on a domestic open and closed fires and also commercial boilers and fires that exhaust waste combustion and gasses into the atmosphere through flues, ducts, chimneys and the like.

The present invention relates to domestic solid fuel and central heating boilers and boilers where heat exchange takes place with water or air. This invention can be used on multi fuels and the like. It is widely recognised in all combustion that fuel is burnt rapidly. Many novelties are available to either help combustion or slow down combustion.

The primary novelty is to control the air ie. the least air the slower combustion takes place.

The greater the flow of air the greater the combustion.

This method is very unsatisfactory the reason being you can only have no air at all leaving the fire to idle. Say the thermostat is on a scale of 1 to 10 1 and 2 possibly 3 have the same effect sleeping fire, 3 to 10 has also got the same effect rapid and fierce combustion as explained not very satisfactory.

The present invention gives a much better control of combustion even though twice or three times the volume of air is required for different fuels. For example burning wood takes a very small amount of air because it is very volatile. On the other end of the scale coke needs more air because of its solidness and absence of volitiles. Lets take for example when certain types of wood are burnt on the present invention its burning rate is slowed down 20 times to the same amount of wood burnt on a similar type of appliance. Different thickness in wood also slows down the burning rate.

The present invention is uniqe and has this ability of slowing down burning rate because of the arrangement of the flues exhausting the gasses. On any other type of appliance there is one chimney and one exhaust hole from the combustion chamber. On the present invention there are two exhaust holes and two chimneys from the combustion chamber. One chimney is slightly smaller and one slightly larger in this case. The larger chimney is at the top of the boiler and is returned into the ashcan area just under the fire bed. This is to take the volatiles which have not fully burned and return them through the fire bed. Air is mixed with these volatiles in the ash pit area this is then pulled through the fire bed with a fan or any other means but in this case under its own hot air.This rises through the bed and burns off any volatiles and then exhausts some of the waste hot gasses up the smaller flue.

The smaller chimney is located in the bottom of the combustion chamber just above the fire bed. This takes some of the volatiles but mostly it is super burnt gasses. The flues as mentioned are not nesserseraly in that order of sizes but are in that arrangement.

The present invention is to slow down combustion as well as burn volatiles and also give greater heat transfer at much higher temperatures for far less fuel. As mentioned wood can be now used more economically. Present wood burners are hungry and uneconomical.

On the chimney which goes down to the ash pit is a bypass for when re fuelling. This allows the exhausted gasses and smoke to go up the smaller chimney and exhaust into the atmosphere.

This is required on closed boilers because when the door is open smoke comes into the room. There is no baffles inside this boiler as in other wood burning stoves and fossil fuel burners. The siamese chimneys either pass volatiles back by means of the larger chimney or extract the gasses into the atmosphere. To make things clear I will explain with a drawing on Fig. 1.

For uses with combustion Fig. 1 is a side veiw has one flue 10 from combustion chamber 1 5 to ash pit for carrying and gasses for re cycaling through fire bed 16. It also has another flue 11 which comes from bottom of fire be out into the atmosphere with connecting flue 1 4 for bypass from 1 0. To control air a butterfly 1 2 are put into the flues. Combustion takes place on the fire bars 1 3. Fig. 2 is a front elevation showing the flue 10.Bending down to ash pit carrying smoke and flue 11 going to the atmosphere 1 5 Fig. 3 shows the door to the fire box 1 9 with air inlets 1 7 allowing air to enter a hollow door with smaller air holes 1 8 spaced out on the inside plate of the door.

1. A siamese arrangement of chimneys mounted on a boiler or boilers for maximum heat exchange. The heat exchange can be on air heating or a wet system. The chimneys arranged to recycle waste gasses and volatiles.

2. An arrangement of chimneys as in claim 1 to pass super heated gasses through the fire bed.

3. An arrangement of chimney as in claims 1 and 2 to exhaust waste gasses out into the atmosphere.

4. An arrangement of chimneys as in claim 3 to slow combustion down and give more heat transfer.

5. An arrangement of chimneys as in previous claim to re heat gasses over and over again to take heat out through heat transfer.

6. An arrangement of chimney as substantially described wiyh reference to Fig. 1 and 2 of the attached drawing.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Siamese chimney Improvement to combustion of fossil and solid fuels on a domestic open and closed fires and also commercial boilers and fires that exhaust waste combustion and gasses into the atmosphere through flues, ducts, chimneys and the like. The present invention relates to domestic solid fuel and central heating boilers and boilers where heat exchange takes place with water or air. This invention can be used on multi fuels and the like. It is widely recognised in all combustion that fuel is burnt rapidly. Many novelties are available to either help combustion or slow down combustion. The primary novelty is to control the air ie. the least air the slower combustion takes place. The greater the flow of air the greater the combustion. This method is very unsatisfactory the reason being you can only have no air at all leaving the fire to idle. Say the thermostat is on a scale of 1 to 10 1 and 2 possibly 3 have the same effect sleeping fire, 3 to 10 has also got the same effect rapid and fierce combustion as explained not very satisfactory. The present invention gives a much better control of combustion even though twice or three times the volume of air is required for different fuels. For example burning wood takes a very small amount of air because it is very volatile. On the other end of the scale coke needs more air because of its solidness and absence of volitiles. Lets take for example when certain types of wood are burnt on the present invention its burning rate is slowed down 20 times to the same amount of wood burnt on a similar type of appliance. Different thickness in wood also slows down the burning rate. The present invention is uniqe and has this ability of slowing down burning rate because of the arrangement of the flues exhausting the gasses. On any other type of appliance there is one chimney and one exhaust hole from the combustion chamber. On the present invention there are two exhaust holes and two chimneys from the combustion chamber. One chimney is slightly smaller and one slightly larger in this case. The larger chimney is at the top of the boiler and is returned into the ashcan area just under the fire bed. This is to take the volatiles which have not fully burned and return them through the fire bed. Air is mixed with these volatiles in the ash pit area this is then pulled through the fire bed with a fan or any other means but in this case under its own hot air.This rises through the bed and burns off any volatiles and then exhausts some of the waste hot gasses up the smaller flue. The smaller chimney is located in the bottom of the combustion chamber just above the fire bed. This takes some of the volatiles but mostly it is super burnt gasses. The flues as mentioned are not nesserseraly in that order of sizes but are in that arrangement. The present invention is to slow down combustion as well as burn volatiles and also give greater heat transfer at much higher temperatures for far less fuel. As mentioned wood can be now used more economically. Present wood burners are hungry and uneconomical. On the chimney which goes down to the ash pit is a bypass for when re fuelling. This allows the exhausted gasses and smoke to go up the smaller chimney and exhaust into the atmosphere. This is required on closed boilers because when the door is open smoke comes into the room. There is no baffles inside this boiler as in other wood burning stoves and fossil fuel burners. The siamese chimneys either pass volatiles back by means of the larger chimney or extract the gasses into the atmosphere. To make things clear I will explain with a drawing on Fig. 1. For uses with combustion Fig. 1 is a side veiw has one flue 10 from combustion chamber 1 5 to ash pit for carrying and gasses for re cycaling through fire bed 16. It also has another flue 11 which comes from bottom of fire be out into the atmosphere with connecting flue 1 4 for bypass from 1 0. To control air a butterfly 1 2 are put into the flues. Combustion takes place on the fire bars 1 3. Fig. 2 is a front elevation showing the flue 10.Bending down to ash pit carrying smoke and flue 11 going to the atmosphere 1 5 Fig. 3 shows the door to the fire box 1 9 with air inlets 1 7 allowing air to enter a hollow door with smaller air holes 1 8 spaced out on the inside plate of the door. CLAIMS

5. As claimed in one, two, three and four twin flued boilers and appliances having sloping fire bars from back flue to front of boiler.

CLAIMS Amendments to the claims have been filed, and have the following effect: Claims 1 to 6 above have been deleted or textually amended.

New or textually amended claims have been filed as follows:-

1. Twin flued boilers and appliances having one flue for exhausting spent gases into the atmosphere and one flue for recycling unburnt combustible gases through the fire bed.

2. As claimed in claim one twin flued boilers and appliances the flues evenly balanced between each other as to create the proper air flow through the fire bed giving maximum combustion.

3. As claimed in one and two twin flues arranged having one flue at the seat of the combustion chamber going out into the atmosphere. This promotes the flow of air through the fire bed and also cleans the spent gases makeing a cleaner environment.

4. As claimed in one, two and three twin flues arranged to become one by a sliding lever sitated at the bottom of both flues at the top of the boiler this is a bypass straight into the atmosphere.