5results about How to "Efficient and stable combustion" patented technology

The application discloses an engine combustion control method, and relates to the technical field of engine control, which comprises the following steps: obtaining a current intercooled mixture temperature at an outlet of an intercooler; when the current intercooled mixture temperature is less than a preset temperature threshold, controlling engine coolant to flow into the intercooler through a heating passage to heat the mixture in the intercooler by using the engine coolant; determining a target ignition angle corresponding to the current intercooled mixture temperature from a preset mapping relationship between the intercooled mixture temperature and the ignition angle based on the current intercooled mixture temperature; and controlling an ignition device to perform an ignition action based on the target ignition angle. The application actively heats the low-temperature mixture by using the engine coolant and synchronously corrects the ignition angle, thereby improving the mixture atomization quality and the combustion rate under a low-temperature working condition, improving the combustion stability, and improving the thermal efficiency of the engine.

The invention aims to provide a W-shaped boiler burner based on pulverized coal particle size separation, belongs to the technical field of pulverized coal combustion, and can solve the problems that coarse pulverized coal particles are located on the periphery of the burner and fine pulverized coal particles are located in the center due to airflow rotation inertia of the W-shaped boiler burner; and the problems of delayed pulverized coal ignition, low combustion efficiency, high NOx emission and the like are solved. A vertical downward injection type structure is adopted, and a cross deflection flow guide structure is arranged in the combustor, so that pulverized coal is finally distributed at a contraction nozzle of the combustor in the mode of'centralized injection of center coarse powder and coating of outer layer fine powder '. By means of the structure, fine pulverized coal can be preferentially ignited in a hearth with the low temperature to establish a stable high-temperature field, central coarse-particle pulverized coal is promoted to be completely burnt out, the burning stability of inferior coal and wide-particle-size pulverized coal is remarkably improved, and the loss of unburnt carbon and the generation amount of NOx are effectively reduced.

The invention provides a biomass oxygen lance and an electric arc furnace, relates to the technical field of metallurgical equipment, and aims at solving the problem that a large amount of carbon is discharged due to the fact that oil oxygen and gas burners are used for fluxing waste steel at the present stage to a certain extent. The invention provides a biomass oxygen lance. The biomass oxygen lance comprises a central pipe, a rotational flow blade and a circular seam sleeve assembly, the central pipe, the rotational flow blade and the circular seam sleeve assembly are sequentially and coaxially arranged in a sleeving mode from inside to outside, a containing cavity is formed in the circular seam sleeve assembly, the central pipe is arranged in the containing cavity, and the rotational flow blade surrounds the outer wall of the central pipe, so that a rotational flow gas channel is formed between the central pipe and the circular seam sleeve assembly; a premixing channel is formed in the position, corresponding to the circular seam sleeve assembly, of the outlet end of the center pipe, and the rotational flow gas channel is communicated with the premixing channel.

The application relates to a marine BOG gas incineration device and a control method thereof. The incineration device comprises a natural gas pipeline system, an auxiliary fuel gas pipeline system, an air supply pipeline system and a GCU incineration device; the natural gas pipeline system comprises a natural gas main pipeline and an ignition branch pipeline, a first combustion branch pipeline and a second combustion branch pipeline, and a diffusion branch pipeline is arranged on the natural gas main pipeline; the auxiliary fuel gas pipeline system comprises an auxiliary fuel gas pipeline, and the auxiliary fuel gas pipeline is connected with the ignition branch pipeline, the first combustion branch pipeline and the second combustion branch pipeline in series; the air supply pipeline system comprises an air supply fan and an air supply pipeline; the GCU incineration device comprises a wind distribution chamber, a treatment chamber, a combustion chamber and a burner, the treatment chamber is communicated with the wind distribution chamber, the combustion chamber is communicated with the treatment chamber, the burner is arranged in the combustion chamber, and the air supply pipeline is communicated with the wind distribution chamber. The application solves the problem that the prior art cannot incinerate three kinds of BOG gas, i.e. low-temperature and low-pressure gas on an LNG ship, high-pressure and normal-temperature gas and low-concentration mixed gas.

This invention proposes a hydrogen fuel turbine engine, including an air intake, a compressor, a hydrogen combustion chamber, a turbine, an exhaust nozzle, and a hydrogen storage device. The hydrogen combustion chamber is supplied with hydrogen via a hydrogen supply pipe, which is installed in an air supply pipe to form an air supply unit. The hydrogen storage device is connected to the hydrogen supply pipe. The air compressed by the compressor enters the hydrogen combustion chamber and is split into two paths. One path directly enters the interior of the flame tube through air holes on the flame tube wall, while the other path is split into multiple paths and connected to the air pipe. The air supply unit enters from the rear end of the flame tube and extends to the front of the flame tube. The hydrogen supply pipe and the air pipe respectively spray hydrogen and air towards the head of the flame tube, where air and hydrogen are mixed and combusted at constant pressure in the flame tube. This invention incorporates an air pipe outside the hydrogen supply pipe. On one hand, this introduces more gas, which lowers the temperature of the main combustion zone in the combustion chamber and reduces the generation of nitrogen oxides. On the other hand, the air pipe can also serve as a heat insulation pipe, effectively reducing the surface temperature of the hydrogen supply pipe. Simultaneously, the air inside the pipe impacts the flame tube head, which not only lowers the temperature of the head panel but also generates a complex vortex structure at the flame tube head, further enhancing the mixing of hydrogen and air. The inconsistent natural frequencies of the vortices prevent thermal oscillation problems.