A high temperature flue gas generator and its control method
A high-temperature flue gas and generator technology, which is applied in combustion methods, lighting and heating equipment, continuous combustion chambers, etc., can solve problems such as endangering human health and decreasing combustion efficiency, so as to reduce emissions, improve combustion stability, reduce Effect of Blending Nonuniformity
Active Publication Date: 2021-10-26
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
The generation of carbon monoxide and inhalable particulate matter not only endangers human health, but also causes a decrease in combustion efficiency.
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[0067] The invention provides a high-temperature flue gas generator and its control method. By arranging a duty nozzle assembly and a premixing nozzle assembly at the head of the combustion chamber, the premixing nozzle assembly injects high-speed premixed combustible gas into the combustion chamber. The high-speed entrainment and backflow of the mixed gas forms a stable flue gas recirculation zone inside the combustion chamber, which makes the premixed gas and flue gas more strongly mixed during the combustion process, thereby reducing the oxygen concentration in the combustion zone and further inhibiting The formation of a local high temperature zone is achieved, thereby achieving ultra-low nitrogen oxide emissions. At the same time, by setting the air flow distribution regulating valve, the downstream of the flame tube cooperates with the use of the air flow distribution regulating valve, which facilitates the adjustment of the outlet temperature of the flue gas generator, a...
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The invention provides a high-temperature flue gas generator and its control method. The on-duty nozzle assembly is arranged at the center of the head baffle of the combustion chamber, and the premixing nozzle assembly is evenly distributed on the head baffle of the combustion chamber in the circumferential direction. An annular air channel is formed between the outer wall of the combustion chamber and the flame tube of the combustion chamber, and an air flow distribution regulating valve is arranged at the inlet of the annular channel. The high-speed jet of the premixing nozzle forms an entrainment backflow in the middle of the combustion chamber, which reduces the formation of nitrogen oxides in the combustion chamber through the flue gas internal circulation mechanism. The outer wall of the flame tube in the combustion chamber is provided with a rib structure for strengthening the cooling of the flame tube by the air in the annular channel. There are multiple rows of mixing holes at the end of the flame tube of the combustion chamber. Through the reasonable distribution of the hole diameter and position of the mixing holes, the flue gas and the mixing air are fully mixed, thereby ensuring the uniform distribution of the outlet flue gas temperature and components. sex. With the use of the air flow regulating valve, the effective adjustment of the outlet flue gas temperature can be realized.
Description
technical field [0001] The invention relates to the technical field of low-pollution combustion, in particular to a high-temperature flue gas generator and a control method thereof. Background technique [0002] High-temperature flue gas generators are usually used in the development of gas turbine hot-end components and heat source supply in the petrochemical field. During the research and development process of the hot-end components of the gas turbine, the flue gas generator is placed upstream of the test section to provide the test section with flue gas under specific flow and temperature conditions, so as to realize the simulation of the real environment where the hot-end components are located. In the field of petrochemical industry, flue gas generators are usually required to generate a large amount of high-temperature flue gas to provide heat sources. Most of these flue gas generators require stable combustion, high combustion efficiency, small pressure drop, unifor...
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IPC IPC(8): F23R3/12F23R3/28F23R3/38
CPCF23R3/12F23R3/283F23R3/286F23R3/38
Inventor 熊燕郑祥龙刘艳马德军肖云汉
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI