8results about How to "Solve combustion instability" patented technology

The invention provides a low-load combustion optimization control system for a unit, and the system comprises a sensing network module which collects key parameters of the unit in a combustion process; the data preprocessing module is used for preprocessing the collected key parameters; the index analysis module is used for analyzing the energy balance deviation degree, chemical balance and combustion uniformity evaluation indexes of the current unit based on the preprocessed key parameters; the control strategy execution module is used for carrying out threshold value judgment on the result of each index and correspondingly executing preset energy balance, chemical balance and combustion uniformity strategies; the feedback regulation module is used for acquiring the executed feedback signal and performing new index analysis and cyclic regulation to form a closed-loop feedback mechanism; energy balance, chemical balance and combustion uniformity in the combustion process are analyzed and controlled, so that combustion stability and combustion efficiency are improved, pollutant emission is reduced, the service life of equipment is prolonged, and meanwhile, the adaptability of a unit to a power grid is enhanced.

The utility model provides a torch head for eliminating smoke by using compressed air, which relates to the technical field of tail gas treatment in the petrochemical industry and comprises a torch cylinder body, an incandescent light ignition device, a compressed gas cylinder, an induced draft fan and an exhaust pipe. According to the torch head for eliminating smoke by using the compressed air, after emptying gas generated in industrial production enters a torch system through the gas inlet cylinder, the emptying gas stably enters the torch cylinder body through the connecting cylinder. And the emptied gas is ignited by the incandescent light in the torch cylinder body for combustion treatment. The induced draft fan is started, negative pressure is formed in the compressed gas cylinder, and external compressed gas enters the compressed gas cylinder and then is sprayed into the torch cylinder in a high-speed jet flow mode through exhaust holes in a hole plate in the side face of the periphery of the exhaust pipe. The compressed gas of the high-speed jet flow is fully mixed with the emptying gas, so that the disturbance of the gas is enhanced, and the emptying gas is more fully combusted. And meanwhile, the supplement of the compressed gas is beneficial to stabilizing the flame, so that the flame is prevented from being extinguished or unstable combustion caused by factors such as strong wind is prevented.

The utility model relates to a low-load combustion control device for a boiler burner, which belongs to the technical field of boiler burners and comprises a combustion shell, three layers of fuel nozzles are uniformly distributed on the inner side wall of the combustion shell, and a lifting combustion device is arranged in the combustion shell. The lifting combustion device comprises a lifting hydraulic rod fixedly installed at the bottom of the combustion shell. According to the low-load combustion control device for the boiler combustor, the lifting combustion device is arranged in the combustion shell, and a lifting hydraulic rod drives a main combustion head to move upwards in the combustion shell, so that the main combustion head is close to the upper layer of a fuel nozzle, and during low-load combustion, only an upper-layer input pipe is opened; fuel is input into the fuel nozzles through the upper-layer fuel pipe to be sprayed into the combustion shell for combustion, and the problem that the position of the main combustion head is fixed, so that the distance between the main combustion head and part of fuel output ports is fixed, and combustion is unstable is solved.

The invention relates to a decomposing furnace deep self-denitration system and process capable of using alternative fuel. The decomposing furnace deep self-denitration system comprises a rotary kiln, a kiln tail smoke chamber, a decomposing furnace, a tertiary air pipe and an alternative fuel storage and transportation system, the decomposing furnace comprises a first-stage combustion furnace, a gasification furnace and a second-stage combustion furnace, the bottom of the first-stage combustion furnace is connected with the kiln tail smoke chamber, the bottom of the gasification furnace is connected with an outlet of the first-stage combustion furnace, and an air inlet of the second-stage combustion furnace is connected with an outlet of the gasification furnace; an air inlet of the second-stage combustion furnace is a volute type air inlet; the tertiary air pipe comprises a tertiary air lower branch pipe and a tertiary air upper branch pipe, the tertiary air lower branch pipe is connected with the side surface of the lower part of the primary combustion furnace, and the tertiary air upper branch pipe is connected with the bottom of the secondary combustion furnace; and an outlet of the alternative fuel storage and transportation system is respectively connected with the primary combustion furnace and the gasification furnace. According to the invention, the feeding fluctuation of alternative fuel can be reduced, the consumption of fire coal is saved, the problem that fuel type NOx is gradually released in a decomposing furnace in an extended range and is difficult to deeply remove is solved, and deep self-denitration is realized.

The present invention relates to a low-nitrogen burner for a preheating furnace of an acetylene device, comprising a burner body, a burner brick and an air gun assembly installed on the burner body, a combustion-supporting hole is provided on the side wall of the burner brick near the top; the air gun assembly comprises an inner ring gun and an outer ring gun, the inner ring gun and the outer ring gun are respectively located on the inner and outer sides of the burner brick and arranged one by one, a main hole and a secondary hole are provided on the outer ring gun nozzle of the outer ring gun, the main hole is parallel to the inclined surface of the outer wall of the burner brick, the angle between the main hole and the axis of the outer ring gun is a1, and the angle between the secondary hole and the axis of the outer ring gun is a2, a1<a2; a vertical spray hole and an inclined spray hole inclined toward the burner brick are provided on the inner ring gun nozzle of the inner ring gun; in a group of outer ring guns and inner ring guns arranged correspondingly, the main hole, the vertical spray hole and the inclined spray hole are located on the same plane. The present invention can meet environmental protection standards and can also effectively solve combustion instability phenomena such as combustion deignition.

The utility model provides a kind of hot blast furnace coal powder's injection device, it is related to coal powder injection technology field, including air preheating pipe and fixed on its upper surface coal powder preheating pipe, air preheating pipe one end is equipped with fixed sleeve, fixed sleeve side surface is embedded with filter plate, fixed sleeve inside is provided with fixed assembly, fixed sleeve is fixed in air preheating pipe one end by fixed assembly.The hot blast furnace coal powder's injection device passes through second fan and passes into air preheating pipe in high-temperature waste gas, and the air preheating pipe inside intake pipe is preheated, to preheat external air, avoid because temperature reduces and influence combustion reaction speed, to improve the stability and efficiency of combustion, and utilize waste gas as heat source, realize air preheating while reducing heat energy loss, improve overall thermal efficiency, mix and spray after preheating outside air and coal powder respectively, can avoid the combustion instability caused by preheating uneven or temperature difference too large.

The utility model discloses a full-mixing premixer and an energy-saving and environment-friendly water heater. The premixer comprises a premixing main body, a premixing pipe and a flow dispersing assembly, the premixing pipe is provided with a first premixing cavity, a plurality of vent holes, a first annular abutting part and a second annular abutting part, the first annular abutting part, the second annular abutting part and the premixing body define an annular gas cavity, and the annular gas cavity communicates with the first premixing cavity through the vent holes; the flow diffusing assembly comprises a flow diffusing arch plate and a flow diffusing base, and a second premixing cavity is formed among the flow diffusing arch plate, the inner wall of the premixing main body, the second annular abutting part and the flow diffusing base; and a third pre-mixing cavity communicated with the second pre-mixing cavity is formed in the flow dispersing base. According to the premixer, the first premixing cavity, the second premixing cavity and the third premixing cavity are formed by arranging the premixing main body, the premixing pipe, the flow diffusing assembly and other accessories, so that air and fuel gas can be fully mixed after being premixed for multiple times, and the problem that combustion is unstable due to insufficient mixing is solved.

The invention discloses a vehicle and an exhaust gas circulation system of an engine of the vehicle, and relates to the technical field of engines. The engine comprises a combustion chamber, an intake manifold and an exhaust manifold. A waste gas circulation system of the engine comprises a supercharging device, an intercooling device and a water control device. The supercharging device is used for mixing waste gas exhausted by the exhaust manifold with air in the external environment, compressing the waste gas and then outputting compressed gas. The intercooling device is used for cooling the compressed gas and outputting the cooled compressed gas; the water control device is used for separating out supersaturated water in the cooled compressed gas, discharging the cooled compressed gas from which the supersaturated water is separated to the air inlet manifold through the air nozzle, atomizing the supersaturated water, and releasing the atomized supersaturated water to the air inlet manifold through the spraying nozzle according to a set spraying amount; according to the technical scheme, the problem that liquid water in compressed gas enters the combustion chamber to cause unstable combustion is solved, and the fuel economy is improved on the premise that normal combustion is not affected.