45results about How to "Solve combustion instability" patented technology

The invention provides an afterburner and a turbine engine. The afterburner comprises an outer cylinder assembly, a center body assembly, an oil way assembly, an annular combustion chamber and an igniter; the center body assembly comprises a front body, a middle body and a rear body, wherein the front body is located at the axial front end of the afterburner and forms a gas inlet, accepting entry of oxygen-containing gas, of the annular combustion chamber with the outer cylinder assembly, the middle body is located behind the front body along the axis and is connected to the front body and integrated with the front body, and the rear body is located behind the middle body in the axial direction, is arranged in the middle body in a slid and sleeved mode and forms a gas outlet of the annular combustion chamber with the outer cylinder assembly; the igniter is arranged at the corresponding part, forming the annular combustion chamber with the outer cylinder assembly, of the center body assembly and is used for igniting fuel gas formed by fuel and the oxygen-containing gas entering the annular combustion chamber, then rotation and knocking combustion of the fuel gas are realized, and therefore the problem that combustion of the afterburner is instable is solved, the heat efficiency of combustion is improved, and the power capability of working media is improved.

The invention discloses a grid frequency regulation method for reducing loads of a generator set rapidly. The method includes the steps that a rapid load reduction set is prepared, the control mode and the steam inlet mode of the rapid load reduction set are selected, the rapid load reduction capacity of the rapid load reduction set is obtained through a simulation experiment, then a grid frequency regulation range is determined according to the correspondence between grid frequency and loads in a large power source-heavy load direct power supply system, then the number of turbine steam inlet regulation valves, needing to be closed, in the generator set is determined according to the grid frequency regulation range and the corresponding amount of loads reduced by rapidly closing turbine steam inlet regulation valves, and the steam inlet regulation valves, on the power side, of the generator set are rapidly closed to rapidly reduce the loads. The method is suitable for rapidly reducing the loads of generators in the large power source-heavy load direct power supply system to achieve grid frequency regulation, solves the problem that when grid frequency in the large power source-heavy load direct power supply system is excessively high, no small set of an appropriate capacity is available to be cut off so as to reduce the grid frequency, achieves the purpose of reducing the loads to reduce the frequency without shutdown and avoids the risk of grid breakdown of a power source system.

The invention belongs to the technical field of AGC (automatic gain control) control and discloses an AGC control method for a 660MW supercritical unit under deep peak-load regulation. The method includes: when a unit load enters a deep peak-load regulation range, subjecting flow of steam pumps to minimum flow limitation; when the flow of each single steam pump is smaller than 435T / H, enabling a steam pump recirculation valve to participate in steam pump inlet flow regulation, slowly opening, and keeping each steam pump operating above minimum output; increasing smoke temperature on a boiler side, and slowly closing a denitrification wide load baffle along with the unit load to keep smoke temperature under a low unit load condition; after the unit load enters the deep peak-load regulationrange, automatically reducing the rate through AGC rate judgment, and enabling boiler master control and steam engine master control PID self-adaption variable-parameter control through AGC control, so that automatic control quality can be improved. Automatic control of the steam feed pump recirculation valve and the denitrification wide load baffle along with the unit load, AGC automatic controlunder deep peak-load regulation, steam engine master control PID self-adaption control and boiler master control PID self-adaption control are realized.

The invention relates to a deep recovery device for boiler flue gas waste heat, comprising a boiler, a steam-water heat exchanger, a flue gas-water heat exchanger, an air-water heat exchanger and an air reheater; the flue gas outlet of the boiler is connected to the steam-water heat exchange The flue gas inlet of the steam-water heat exchanger is connected to the flue gas inlet of the flue gas-water heat exchanger, and the air outlet of the air-water heat exchanger is connected to the air inlet of the air reheater. The air outlet is connected to the air inlet of the boiler; one water outlet of the steam-water heat exchanger is used for outward overflow, the other water outlet is connected to the water inlet of the boiler, and the water outlet of the boiler is connected to the return water inlet of the steam-water heat exchanger through the heat network; One water outlet of the air-water heat exchanger is used for outward overflow, the other water outlet is connected to the water inlet of the air-water heat exchanger, and the water outlet of the air-water heat exchanger is connected to the inlet of the flue gas-water heat exchanger. water outlet. The invention can increase the dew point temperature of the flue gas, recover more waste heat of the flue gas, lower the combustion temperature and reduce the NOx emission at the same time.

The invention relates to an opening circular road whirling premixing upward-spraying backflow preheat burner, which effectively solves the problems that the fuel consumption is high, combustion is instable, the combustion intensity is low, combustion air velocity temperature distribution is non-uniform, the efficiency is low and the environment is polluted; the structure is that: a semisphere topcylindrical shape with closed upper end and a downward opening is formed by a cylindrical wall body and an arch top at the upper part of the cylindrical wall body, a combustion chamber is arranged atthe upper part in the cylindrical wall body in the arch top, a pre-mixing circular road with an opening at the upper part is circularly distributed on the inner wall of the cylindrical wall body, thepre-mixing circular road is respectively communicated with a coal gas inlet pipe and an air inlet pipe through a coal gas diversion channel and an air diversion channel, diversion guiding blocks are uniformly distributed in the coal gas diversion channel and the diversion channel, a current-limiting ring is communicated with the opening at the upper part of the premixing circular road; the opening circular road whirling premixing upward-spraying backflow preheat burner effectively solves the problems low-heat value gas combustion is instable, the combustion intensity is low and the combustiontemperature is low, and simple structure of the invention is obviously superior to the structures of a flameless burner and a staggering injection rapid mixing combustor which are arranged in an airflow spray pipe.

The invention discloses a low-NOx burner for resource utilization of extremely low calorific value associated gas and carbon black burnout, which includes a flue gas inlet for entering the extremely low calorific value gas generated during the production process of activated carbon, and the flue gas inlet is output The end is connected to the pilot combustion chamber, and the primary air inlet is set on the pilot combustion chamber, and the low calorific value gas combusted in the pilot combustion chamber passes through the swirl channel regenerative burner and the exhaust air sent in by the exhaust air inlet. Complete combustion in the concave heat-gathering combustion chamber and furnace. The invention realizes the integrated treatment of industrial extremely low calorific value associated gas combustion, carbon black elimination and low NOx combustion. The heat of extremely low calorific value gas is effectively used, which greatly improves the efficiency of energy utilization. It can provide heat for subsequent enterprise transformation such as flue gas whitening or heating transformation, and eliminate environmental pollution such as carbon black.

The invention discloses an ignition optimal control method for a sintering machine. The ignition optimal control method comprises the steps that valves controlling natural gas and air flow are connected with PLC / DCS systems correspondingly, and PID closed-loop control is adopted; a flow follow-up regulation mode is used, an air-fuel ratio and natural gas flow are set, and according to the formulathat natural gas flow*air-fuel ratio=air flow, the set air flow is obtained; then an ignition temperature control mode is used, and according to the deviation of target temperature and the current temperature, a new natural gas flow target value is calculated; then an ignition strength control module is used, the current ignition strength is obtained, and then target ignition strength is given according to the current ignition strength; and then according to the target ignition strength, the natural gas flow needing to be achieved is obtained, and then air flow is obtained through the air-fuelratio. According to the ignition optimal control method, a waste or flameout phenomenon of natural gas is avoided, meanwhile stability of PID closed-loop control in the regulation process is ensured,instable burning is prevented, and thus operation of the sintering machine is safer, more reliable and more stable.

The invention belongs to the technical field of renewable energy, and in particular relates to a biomass low-temperature charcoal-gas cogeneration device, a biomass low-temperature charcoal-gas cogeneration device and a charcoal-gas cogeneration method. The biomass low-temperature carbon-gas cogeneration device includes a feeding device, a fluidized bed charcoal-gas cogeneration furnace body, a biomass charcoal reheating device, a gas-solid separation device, a blower, and a biomass charcoal cooling and collecting device. The biomass low-temperature carbon-gas cogeneration device includes all the devices of the biomass low-temperature carbon-gas cogeneration device and also includes a waste heat boiler and a flue gas fan. The invention has the advantages of high-quality produced biomass charcoal, low pyrolysis temperature of biomass raw materials, and the like.

The invention provides a turbine engine. The turbine engine comprises a receiver, a turbine, a shunt ring, a shell, an oil way component and an igniter. The shunt ring is connected to the front end of the receiver, and coats the turbine with the receiver. The shell accommodates the receiver, and forms an outer culvert combustion chamber with the outer wall surface of the receiver; and the shunt ring and the internal of the receiver form an inner culvert airflow channel. The oil way component is controlled to communicate to the outer culvert combustion chamber. The igniter is arranged in the outer culvert combustion chamber for igniting gas to generate knocking combustion of the gas. In the turbine engine, the outer culvert combustion chamber is simple in structure and light in weight, so that the thrust-weight ratio of the engine is largely increased. As the igniter is arranged in the outer culvert combustion chamber, the gas entering the outer culvert combustion chamber can rotate to generate the knocking combustion, the problem of unstable combustion of a traditional turbine engine is solved, the combustion heat efficiency is improved, and the fuel economy and the working reliability of the turbine engine are improved.

The invention discloses a method for adjusting the air volume of a fan used in a gas water heater, which is specifically implemented according to the following steps: S1, the user inputs a preset temperature T 预设 ; S2, according to the preset temperature T in the S1 预设 Calculate the initial secondary pressure P 初始 , and according to the initial secondary pressure P 初始 Adjust the initial current I of the fan 初始 ; S3, gas water heater with the initial current I described in S2 初始 start; S4, according to the outlet water temperature, inlet water temperature and water flow rate to the initial secondary pressure P 初始 Adjust to obtain the actual secondary pressure P 实际 , and according to the actual secondary pressure P 实际 Calculate the actual current I of the fan 实际 ; S5, blower fan with the actual current I in the said S4 实际 run. The invention also discloses a gas water heater. The method for adjusting and controlling the fan air volume of the present invention does not need to increase additional costs, and only needs to adjust the fan current again according to the actual secondary pressure in the control program to solve the problem of unstable combustion of existing gas water heaters under different pressures.