Staged combustion NOx emission reduction system capable of preventing crust and technological process of staged combustion NOx emission reduction system
A graded combustion and skinning technology, which is applied in the maintenance of heating chambers, waste heat treatment, furnace control devices, etc., can solve the problem of increasing system resistance and energy consumption, skinning at the air inlet of the calciner, and continuous production of cement enterprises have a great impact, etc. question
Pending Publication Date: 2021-07-23
NANJING KISEN INT ENG
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Problems solved by technology
[0004] However, the main problem of the above-mentioned technology is that the internal skinning phenomenon from the reactor to the air inlet of the calciner is serious. Long-term operation will increase the system resistance and energy consumption. In severe cases, the kiln must be shut down for cleaning, which has a great impact on the continuous production of cement enterprises. Urgently need to be resolved
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[0016] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by those skilled in the art to which the present invention belongs. "First", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right" and so on are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change acc...
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The invention relates to a staged combustion NOx emission reduction system capable of preventing crust and a technological process of the staged combustion NOx emission reduction system. The staged combustion NOx emission reduction system comprises a rotary kiln, a smoke chamber, a reactor, a tertiary air duct, a decomposition furnace, a material distributing valve, a first cyclone, a second cyclone and a third cyclone, wherein an air inlet of the smoke chamber is connected with an air outlet of the rotary kiln; the air inlet of the reactor is connected with the air outlet of the smoke chamber; and the air inlet of the third cyclone is connected with the air outlet of the reactor, and the air outlet of the third cyclone is inserted below one side of the decomposition furnace and communicates with the interior of the decomposition furnace. According to the staged combustion NOx emission reduction system, the third cyclone is arranged to collect raw materials fed into the air inlet of the reactor so as to prevent the raw materials from entering the decomposition furnace, so that crust is effectively prevented from being generated in the air inlet of the decomposition furnace to reduce the resistance and energy consumption of the system, and long-term reliable operation of the system is practically ensured to eliminate the influence on continuous production of the rotary kiln.
Description
technical field [0001] The invention relates to a stratified combustion NOx emission reduction system for preventing skinning and its process flow. Background technique [0002] At present, the problem of environmental pollution is becoming more and more serious, and the requirements for environmental protection indicators in various industries are becoming more and more stringent. Some provinces and cities have taken the lead in proposing ultra-low emission requirements, and controlling flue gas NOX emissions below 50mg / Nm3. [0003] At present, cement enterprises mainly adopt the NOX emission reduction technology of staged combustion, that is, add a section of pipe (reactor) between the smoke chamber of the rotary kiln and the calciner, and connect the tertiary air of the kiln head into the pipe from the side, and at the same time, in its appropriate The position is connected to raw material and fuel, and the "Budual" reaction is used to reduce CO2 to CO, or to use fuel py...
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IPC IPC(8): F27D17/00F27D7/06F27D19/00F27B7/00
CPCF27B7/00F27D7/06F27D17/008F27D19/00F27D2007/063
Inventor 王东华超徐连春李安平钟永超匡祉桦崔恒波
Owner NANJING KISEN INT ENG