A fuel nozzle assembly includes an inner fuel nozzle; a plurality of outer fuel nozzles disposed radially around the inner fuel nozzle, each outer fuel nozzle including a central body for fuel injection, a shroud spaced apart from and surrounding the central body, the shrouds forming an outer periphery of the fuel nozzle assembly, and an inlet formed at one end of the shroud; and a peripheral rim formed at the inlets and disposed to cover at least a portion of the outer periphery. The fuel nozzle assembly is connected to an end plate of a combustion chamber. The one end of a corresponding shroud is disposed at a set distance from an end plate of a combustion chamber, the set distance depending on at least one of relative positions of the inner fuel nozzle and the plurality of outer fuel nozzles and an inlet radius of the corresponding shroud.

An engine can utilize a combustor to combust fuel to drive the engine. A fuel nozzle assembly can supply fuel to the combustor for combustion or ignition of the fuel. The fuel nozzle assembly can include a swirler and a fuel nozzle to supply a mixture of fuel and air for combustion, which can supply a primary fuel supply and a secondary fuel supply. Increasing efficiency and reducing emission require the use of alternative fuels, which combust at higher temperatures or burn at faster burn speeds than traditional fuels, requiring improved fuel introduction without the occurrence of flame holding or flashback.

A water heater includes a vessel (20) provided with a burner (3) having a downward combustion surface, a fan casing (10) accommodating a fan (10a) for supplying a mixture gas of primary combustion air and fuel gas to the burner, an annular packing connecting a first connection end surface at a downstream end of a first passage forming a downstream-side passage of the fan casing with a second connection end surface at an upstream end of a second passage forming an upstream-side passage of the vessel in airtight state, and a check valve (5) disposed near the upstream end in the second passage (2).

A storage system includes a storage tank adapted to store a fluid therein, a flame arrestor being positioned downstream from the storage tank, a thermal valve being positioned downstream from the flame arrestor, and a flare stack being positioned downstream from and in fluid communication with the thermal valve. An outlet port of the storage tank is in fluid communication with an inlet port of the flame arrestor, and an outlet port of the flame arrestor is in fluid communication with an inlet port of the thermal valve. A flow path is formed between the storage tank and the flare stack via the flame arrestor and the thermal valve. The thermal valve has a cross-sectional area along a direction of the flow path which is substantially vacant of physical detonation-inducing obstructions.

An engine can utilize a combustor to combust fuel to drive the engine. A fuel nozzle assembly can supply fuel to the combustor for combustion or ignition of the fuel. The fuel nozzle assembly can include a swirler and a fuel nozzle to supply a mixture of fuel and air for combustion, which can supply a primary fuel supply and a secondary fuel supply. Increasing efficiency and reducing emission require the use of alternative fuels, which combust at higher temperatures or burn at faster burn speeds than traditional fuels, requiring improved fuel introduction without the occurrence of flame holding or flashback.

A storage system includes a storage tank adapted to store a fluid therein, a flame arrestor being positioned downstream from the storage tank, a thermal valve being positioned downstream from the flame arrestor, and a flare stack being positioned downstream from and in fluid communication with the thermal valve. An outlet port of the storage tank is in fluid communication with an inlet port of the flame arrestor, and an outlet port of the flame arrestor is in fluid communication with an inlet port of the thermal valve. A flow path is formed between the storage tank and the flare stack via the flame arrestor and the thermal valve. The thermal valve has a cross-sectional area along a direction of the flow path which is substantially vacant of physical detonation-inducing obstructions.

The invention provides a burner device 100 for providing thermal energy by combustion of an air-fuel mixture G, which burner device comprises a flame body 1 which delimits an interior space 11 which is connected via openings in the flame body 1 to an outer combustion surface 12 of the flame body 1, on which the combustion of an air-fuel mixture G, which is introduced into the interior space 11 and flows through the openings, takes place in one or more burner flames, and a flow guiding device 2 which comprises an axial flow channel 21, which is located mostly or completely in the interior space 11, for guiding through the air-fuel mixture G, which runs in particular parallel to a longitudinal axis LA of the flame body 1, the axial length of which is selected as a function of an oscillation frequency induced by the one or more burner flames.

A low-concentration gas differential combustion device includes a low-concentration gas super-cooling dehydration and demisting device, a gas pretreatment device, a burner, a long-term burning open fire device, a high-energy self-heat dispersion rapid ignition device, a combustion chamber, and a waste-heat utilization device. With the low-concentration gas differential combustion device, the problems of gas escaping, forced direct emission, low heat extraction efficiency, concentration over-limit explosions, increase in equipment volume and increase in investment caused by the reversal process in the existing ventilation air oxidation technology, and the problems of narrow gas adaptation concentration range, small adaptive concentration and pressure change amplitude, poor combustion temperature adjustability, high NOx content, high shutdown rate, and low gas utilization rate in the low-concentration gas internal combustion engine power generation technology are solved.

A burner combustion system comprising: a burner casing comprising a first inlet and a first outlet; a combustion substrate disposed in the burner casing, wherein the combustion substrate is porous, and wherein the burner casing first outlet is disposed on an exterior of the combustion substrate; an inlet conduit disposed in the burner casing, the conduit comprising a second inlet and second outlet, wherein the second inlet of the conduit is outside the burner casing, and, wherein the second outlet of the conduit is connected to the burner casing first inlet, and wherein the combustion substrate may have a flat shape and wherein the burner combustion system may further comprise a baffle.

There is provided a system for consistent production of a low-or zero-emission flame comprising an electrolyser, a power assembly, a burner element, and a gas flow control system. There is also provided a device for consistent production of a low-or zero-emission flame using the disclosed systems. There is also provided a method for consistent production of a low-or zero-emission flame. There is further provided a kit for assembling, modifying or retrofitting an apparatus to permit consistent production of low-or zero-emission flame using the disclosed systems and methods.