15 results about "Autoignition temperature" patented technology

A lubricating oil composition configured for lubricating an internal combustion engine fueled with an alternative fuel having an auto-ignition temperature greater than about 700K. The lubricating oil composition includes at least a detergent system including at least one overbased metal-containing sulfonate detergent, optionally at least one neutral to low-based metal containing sulfonate detergent, and where the metal provided from the overbased sulfonate detergent is balanced relative to the total detergent metal and / or the composition total base number.

The present invention relates to a method for determining whether to use spontaneous combustion or artificial ignition in an oil reservoir, which comprises the following steps: step one, using an accelerating calorimeter to determine the spontaneous combustion temperature; step two, considering the oxidation time required to reach a certain spontaneous combustion temperature when heat loss is taken into account; step three, determining whether to use spontaneous combustion or artificial ignition; the spontaneous combustion temperature is determined by experiment, and the oxidation time required to reach the spontaneous combustion temperature is calculated in step two; if the decrease in oil production caused by the delay of combustion results in a decrease in income that is greater than the cost of artificial ignition, then artificial ignition is used, otherwise, spontaneous combustion is used. The present invention can design a more economically efficient oil production method, and if the oil reservoir can spontaneously combust, expensive artificial ignition equipment does not need to be invested.

A lubricating oil composition configured for lubricating an internal combustion engine fueled with an alternative fuel having an autoignition temperature above about 700K. The lubricating oil composition comprises at least a detergent system comprising at least one overbased metal sulfonate-containing detergent, at least one neutral to low-based metal sulfonate-containing detergent, and at least one overbased metal phenate-containing detergent, wherein the metals provided by the overbased sulfonate detergent are appropriately balanced relative to the total detergent metals and / or the total base number of the composition.

An apparatus can be arranged and configured so that after a gas turbine is shut down due to a detected condition, a higher autoignition temperature fuel can be utilized to purge a fuel delivery system and facilitate a quicker restart of the turbine. Embodiments can utilize conduits, valves, and a control system for detection of a fault condition warranting a shut down, purging of a lower autoignition temperature fuel via venting and use of a higher autoignition temperature fuel for purging to facilitate subsequent restarting of the turbine. Embodiments can be configured so an inert gas purge is not needed for venting and purging of the fuel delivery system.

Disclosed in the present invention is a diffuse regenerative combustion industrial furnace, comprising a furnace chamber, an airflow reversing system and at least two regenerative boxes, wherein burners are mounted on the furnace chamber, at least two burners are provided, and within a period of time in a low-temperature stage, the at least two burners maintain continuous operation without interruption, the low-temperature stage referring to a period of time in which the temperature in the furnace chamber has not reached the auto-ignition temperature of fuel. Further provided in the present invention is a heating method for heating a material by using the diffuse regenerative combustion industrial furnace described above. The diffuse regenerative combustion industrial furnace of the present invention completely eliminates the risk of deflagration in a diffuse regenerative combustion system, resulting in significantly higher safety and significantly improved production efficiency, and successfully solving the problem in the prior art of low production rate.

A method of providing flameless combustion includes forming a pre-heated reactant stream in a primary reaction zone by reacting a first stream of fuel and a first stream of undiluted oxidant and maintaining a combustible air / fuel ratio within flammability limits of the fuel. Forming a combustion stream by reacting a first stream of diluted oxidant, a second stream of fuel, and the pre-heated reactant stream in at least one secondary reaction zone downstream of the primary reaction zone. The combustion stream is maintained at a bulk combustion temperature below an auto-ignition temperature of the combustion stream. A composition of the combustion stream and the bulk combustion temperature are adjusted to maintain combustion marginally above a lower ignition limit boundary of the combustion stream. Upon the composition and the bulk combustion temperature reaching pre-determined flameless combustion conditions, the bulk combustion temperature is increased above an auto-ignition temperature of the combustion stream.

A method of providing flameless combustion includes forming a pre-heated reactant stream in a primary reaction zone by reacting a first stream of fuel and a first stream of undiluted oxidant and maintaining a combustible air / fuel ratio within flammability limits of the fuel. Forming a combustion stream by reacting a first stream of diluted oxidant, a second stream of fuel, and the pre-heated reactant stream in at least one secondary reaction zone downstream of the primary reaction zone. The combustion stream is maintained at a bulk combustion temperature below an auto-ignition temperature of the combustion stream. A composition of the combustion stream and the bulk combustion temperature are adjusted to maintain combustion marginally above a lower ignition limit boundary of the combustion stream. Upon the composition and the bulk combustion temperature reaching pre-determined flameless combustion conditions, the bulk combustion temperature is increased above an auto-ignition temperature of the combustion stream.

To provide a gas detector capable of keeping the inside of a heating furnace in a high temperature state while suppressing unexpected combustion or explosion.SOLUTION: The gas detector 6 includes a gas concentration detector 14 for detecting the concentration of the fuel gas in the heating furnace 4, a temperature sensor 10 for detecting the temperature in the heating furnace 4, and a controller 24 for determining whether the temperature is lower than the self-combustion temperature of the fuel gas and causing the gas concentration detector 14 to detect the concentration of the fuel gas until the temperature reaches the self-combustion temperature of the fuel gas.SELECTED DRAWING: Figure 1

Various embodiments described herein are related to a flame mitigation device that can comprise a rigid body comprising a side wall having a first perforation of a first size and a second perforation of a second size. The rigid body can be hollow and the first size can be greater than the second size Also, the first perforation and the second perforation can provide fluid communication through the side wall. Moreover, the flame mitigation device is configured to absorb enough heat to drop a burning air / fuel mixture below its auto-ignition temperature at a flame speed between 4 and 6 meters per second.

A lubricating oil composition configured for lubricating an internal combustion engine fueled with an alternative fuel having an autoignition temperature above about 700K. The lubricating oil composition comprises at least a detergent system comprising at least one overbased metal sulfonate-containing detergent, optionally at least one neutral to low based metal sulfonate-containing detergent, and wherein the metals provided by the overbased sulfonate detergent are balanced relative to the total detergent metals and / or the total base number of the composition.

A method for heating a reactor using a multifunctional burner, the method comprising feeding a primary fuel through an annular passage, feeding oxygen through a central passage within the annular passage, and feeding an auxiliary fuel through a central lance within the central passage to produce a flame extending into a furnace having a temperature and pressure; wherein the flow rates of auxiliary fuel and oxygen are increased while maintaining the equivalence ratio below 1 to increase the temperature of the furnace; wherein after a furnace temperature exceeds an auto-ignition temperature of the main fuel, a flow rate of the main fuel is increased to increase the equivalence ratio to greater than 1.

In an example of the disclosure, a heat exchange and flame arrest device for use with a subject gas includes tubing arranged to traverse a core, with the tubing defining a cooling fluid pathway. The core includes a gas flow inlet, a set of cooling fins, and a gas flow outlet. The gas flow inlet, the set of cooling fins, and the gas flow outlet collectively form a gas flow pathway for a subject gas. Each cooling fin of the set is positioned to form a gap between that cooling fin and an adjacent cooling fin. The gas flow inlet is to receive the subject gas. The combination of the gap between each cooling fin of the set and the cooling capacity of the cooling fluid pathway is sufficient to, if the subject gas has ignited, lower temperature of the subject gas to below autoignition temperature.

For example, an apparatus may be arranged and configured such that a higher auto-ignition temperature fuel may be utilized to purge a fuel delivery system after a gas turbine is shut down due to detected conditions and facilitate faster restart of the turbine. Embodiments may utilize conduits, valves, and control systems to detect fault conditions to ensure shutdown, purge lower auto-ignition temperature fuel through exhaust, and purge using higher auto-ignition temperature fuel to facilitate subsequent restart of the turbine. Embodiments may be configured such that no inert gas purge is required to exhaust and purge the fuel delivery system.

A lubricating oil composition configured for lubricating an internal combustion engine fueled with an alternative fuel having an auto-ignition temperature greater than about 700K. The lubricating oil composition includes at least a detergent system including at least one overbased metal-containing sulfonate detergent, at least one neutral to low-based metal containing sulfonate detergent, and at least one overbased metal-containing phenate detergent where the metal provided from the overbased sulfonate detergent is correctly balanced relative to the total detergent metal and / or the composition total base number.

A lubricating oil composition configured for lubricating an internal combustion engine fueled with an alternative fuel having an auto-ignition temperature greater than about 700K. The lubricating oil composition includes at least a detergent system including at least one overbased metal-containing sulfonate detergent, at least one neutral to low-based metal containing sulfonate detergent, and at least one overbased metal-containing phenate detergent where the metal provided from the overbased sulfonate detergent is correctly balanced relative to the total detergent metal and / or the composition total base number.