Apparatus and method for promoting interaction of fine particles in coal-fired boiler flue gas

A technology for fine particles and coal-fired boilers, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles. It can solve problems such as increased flue resistance, increased collisions and interactions, and small changes in fluid velocity gradients. The effect of close connection, reasonable overall layout and simple device structure

CN105749690BInactive Publication Date: 2017-12-15HEBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-12-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a device and method for promoting interaction of fine particles in smoke of a coal-fired boiler.The device is characterized by comprising a rectangular channel, a shrinking and expanding throat, a turbulence clustering chamber and a smoke outlet, the rectangular channel serves as a smoke inlet, the shrinking and expanding throat comprises a gradually-shrinking part and a gradually-expanding part, the gradually-shrinking part is connected with the rectangular channel, the gradually-expanding part is connected with one end of the turbulence clustering chamber, and the smoke outlet is formed in the other end of the turbulence clustering chamber and connected with a subsequent dust removing device; a plurality of rectangular fins are arranged in the turbulence clustering chamber, every two rectangular fins form a set, n sets of fins are arranged, n is larger than or equal to 2, the two rectangular fins of each set are in a splay shape, the small opening end of the splay shape faces the smoke flow incoming direction, and the n sets of rectangular fins are sequentially arranged in the turbulence clustering chamber in the smoke flow incoming direction; an included angle ranging from 20 degrees to 60 degrees is formed between the rectangular fins and the smoke flow incoming direction, and the proportion of the length, in the width direction, of the turbulence clustering chamber to the diameter of the throat part of the shrinking and expanding throat is 6:5.
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Description

technical field

[0001] The invention relates to a technology for removing fine particles in coal-fired flue gas, in particular to a device and method for promoting the interaction of fine particles in coal-fired boiler flue gas. Background technique

[0002] Inhalable particulate matter (PM 10 ) refers to fine particulate matter with an aerodynamic diameter less than or equal to 10 μm, especially the PM contained therein 2.5 It has caused serious atmospheric environmental problems, which has attracted great attention from our country. PM 2.5 The harm of fine particles is that the particle size is small, the specific surface area is large, and it is easy to absorb harmful substances such as viruses and bacteria. After entering the human body, they can form deposits in the alveoli, causing respiratory diseases and cardiopulmonary diseases, which are extremely harmful to the human body; at the same time, fine particles in the atmosphere The residence time is long and the tra...

Examples

Embodiment 1

[0036] In this embodiment, the device for promoting the interaction of fine particles in the flue gas of a coal-fired boiler includes a rectangular channel 1, a zoom throat 2, a turbulent agglomeration chamber 3, and a flue gas outlet 4, the rectangular channel 1 is the flue gas inlet, and the zoom throat The port 2 includes a tapered part and a tapered part, the tapered part is connected to the rectangular channel 1, the tapered part is connected to one end of the turbulent flow reunion chamber 3, and the other end of the turbulent flow reunion chamber 3 is provided with a smoke outlet 4, which is connected to the Subsequent dust removal equipment connection; said turbulent flow reunion chamber 3 is provided with a certain number of rectangular fins 31, every two rectangular fins are a group, a total of n groups, and n≥2, each group of two rectangular fins 31 is in the shape of "eight", and the small mouth end of the "eight" shape faces the direction of the incoming flow of th...