Burner for burning fuel and a device comprising such a burner
a burner and fuel technology, applied in the direction of combustion process, combustion ignition, heating types, etc., can solve the problems of high carbon monoxide emissions, limited design options of compact burners and heat exchangers, and material destruction risk
Inactive Publication Date: 2015-12-24
HEATCORE
View PDF6 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0003]An object of the present invention is to avoid the above mentioned drawbacks and problems of the prior and provide a more reliable and efficient burner. The invention results in the possibility of obtaining more compact and cost efficient devices for heating.
[0004]The present invention relates to a burner for combustion of fuel, comprising an outer cover having an inlet for the fuel, and a combustion chamber arranged within the outer cover, in which chamber the fuel is converted into combustion gases, characterised in that the burner comprises an inner cover arranged in the outer cover and provided with an inlet opening for the fuel to form a space between the outer cover and the inner cover for conducting incoming fuel around the inner cover and to the inlet opening of the inner cover. Hence, the burner is cooled by means of incoming fuel or mixture of fuel and air, wherein simplified cooling of the burner is obtained to avoid backfiring.
[0006]The burner can comprise a catalyst for catalytic combustion of the fuel to combustion gases. The catalyst can be tapered, such as conical or formed as a half sphere or in any other suitable manner, so that the combustion takes place from the outside and into the burner. Further, the device can be arranged so that the combustion takes place from the top and downwards. Thereby, overheating of the covers of the burner is avoided, which covers in addition are cooled by incoming fuel or mixture of fuel and air and also conductively by contact with the heat exchanger.
[0009]Disclosed is also a device for heating, comprising a burner provided with a catalyst to provide the first medium through catalytic combustion of fuel, and a plate heat exchanger as above connected to the burner to transfer heat from the first medium to the second medium. Hence, the first medium is combustion gases and the second medium can be a liquid, such as water. The resulting device is efficient and can be made compact and with long durability.
[0010]Disclosed is also a heat exchanger plate for plate heat exchangers, comprising a plurality of ports, a first side, a second side and a centre point through which an imaginary centre axis extends in a direction perpendicular to a plane of the plate, wherein the plate comprises a first port for a first medium, and at least a second port and a third port for a second medium. The plate further comprises a first sealing arranged on the second side around the first port, a second sealing arranged on the second side at a circumference of the plate, and a closed third sealing arranged between the first and second sealing to form a first heat transfer area and a second heat transfer area separated from the first heat transfer area, wherein the second port is arranged in the first heat transfer area and the third port is arranged in the second heat transfer area. By the design of the heat exchanger plate efficient heat transfer from the first medium to the second medium is made possible, wherein overheating, particularly at a rim around the first port, is avoided. In turn this prevents formation of cracks due to thermo-mechanical phenomena and too high temperatures and makes it possible to obtain a long life time of heat exchangers comprising such plates. Further, heat exchange is made possible in which the flow directions are counter current radial and the second medium can flow both in parallel and sequentially through a plate package of a heat exchanger. By the efficient heat transfer boiling of a second medium in the form of, for example, water can be avoided, which also can reduce precipitation of lime compounds. Further, poor condensation of a first medium in the form of combustion gases can be avoided.
[0014]Disclosed is also a plate heat exchanger comprising a plate package having a first end plate, a second end plate and a plurality of heat exchanger plates as above arranged between them, wherein the plates are arranged to alternatingly form a first interspace between them for the first medium, and alternatingly a second interspace between them for the second medium, wherein the plates are arranged to form a passage in the radial direction between the first port and the circumference of the plates in the first interspaces, so that the first medium can flow radially between the first port and a position outside the circumference of the plates, wherein at the second end plate the heat exchanger is arranged with a passage between the second port and the third port, so that the second medium can flow between them. Hence, a compact and efficient heat exchanger for transferring heat from a first medium, such as combustion gases, to a second medium, such as water, is provided.
Problems solved by technology
The possibilities to design compact burners and heat exchangers are limited by the combustion technique in which a specific flame length is required to obtain efficient combustion.
Further, there is a risk that the flame per se or the flame zone come into direct contact with heat transfer surfaces of the heat exchanger, which will lead to high emissions of carbon monoxide and a risk of destruction of materials.
Hence, the result is that prior art devices are inefficient, space requiring, heavy and expensive.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028]Referring to FIG. 1 a device 10 for heating according to one embodiment is illustrated schematically. The device 10 comprises a burner 11, a heat exchanger 12 and a shell 13 for containing the heat exchanger 12. For example, the device 10 is arranged for heating a medium, such as a liquid or a gas. For example, the device 10 is arranged for producing heat and hot water in buildings, such as dwelling houses, industry facilities, office buildings and similar. According to one embodiment the device 10 is mounted in a central heater, such as a wall-mounted heating boiler for production of heat and hot water.
[0029]The burner 11 comprises an inlet 14 for conducting fuel, such as natural gas or any other suitable type of fuel, into the burner 11. For example, the inlet 14 is arranged for conducting a mixture of fuel and air into the burner 11. Alternatively, the burner 11 is arranged with a separate inlet for air or oxygen, which is not illustrated in the drawings. The burner 11 furt...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A burner (11) is provided for combustion of fuel, comprising an outer cover (23) having an inlet (14) for the fuel, and a combustion chamber (27) arranged within the outer cover (23), in which chamber the fuel is converted into combustion gases. The burner (11) comprises an inner cover (24) provided with an inlet opening (26) for the fuel, the inner cover being arranged within the outer cover (23) to form a space (25) between the outer cover (23) and the inner cover (24) for conducting incoming fuel around the inner cover (24) and to the inlet opening (26) of the inner cover (24). The invention also relates to a device for heating, comprising such a burner (11).
Description
FIELD OF THE INVENTION[0001]The invention relates to a burner for burning fuel. The invention also relates to a device for heating, comprising a burner and a heat exchanger for recovering thermal energy from combustion gases produced by the burner. This type of devices for heating can be used in central heaters for heat and hot water production. Heat exchangers are used for recovering thermal energy from a first medium to a second medium, such as for recovering heat from the first medium. One type of heat exchanger comprises a plurality of heat exchangers in the form of a plate package and can be arranged as a so called plate and shell heat exchanger.PRIOR ART[0002]There are numerous different types of burners and devices for heating in the prior art. In the heating industry moulded or tube shaped heat exchangers are used for recovering thermal energy from combustion gases, also called combustion heat, which is produced by flame combustion of a mixture of fuel and air. Flame combust...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityApplications(United States)
IPC IPC(8): F23C13/00F23C5/02F24H1/32
CPCF23C13/00F23C5/02F24H1/32F23C5/08F23D14/00F23C3/00F23C7/00F23C2900/13001F23D14/02F23D14/66F23D2900/00003F24D3/08F24H1/0045F24H1/38F24H1/43F24H1/48F28D9/0012F28D9/0043F28D21/0007F28F3/086Y02E20/34F23C9/00F28D1/0333
InventorSILVERSAND, FREDRIK
OwnerHEATCORE