A converter primary dust removal system for reducing particulate matter emission and using method thereof

A dust removal system and particle technology, applied in the field of converter dust removal, can solve the problems of increasing investment, operation management and operation maintenance costs, reducing the space occupied by the dehydrator, and failing to meet environmental protection requirements, etc., to achieve good fluid mechanics performance, Optimize group layout and reduce system resistance

A dust removal system and particle technology, applied in the field of converter dust removal, can solve the problems of increasing investment, operation management and operation maintenance costs, reducing the space occupied by the dehydrator, and failing to meet environmental protection requirements, etc., to achieve good fluid mechanics performance, Optimize group layout and reduce system resistance

CN113621752BActive Publication Date: 2022-08-05NORTHEASTERN UNIV LIAONING
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  • A converter primary dust removal system for reducing particulate matter emission and using method thereof
  • A converter primary dust removal system for reducing particulate matter emission and using method thereof
  • A converter primary dust removal system for reducing particulate matter emission and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The structure of the primary dust removal system of the converter to reduce the emission of particulate matter is as follows: figure 1 As shown, it includes converter 1, primary spray washing tower 4, secondary spray washing tower 7, annular slit venturi 11, flue gas water mist separator 15, first cyclone dehydrator 17 and second cyclone dehydrator 19;

[0082] The flue gas collection hood 2 is matched with the converter 1, and the flue gas collection hood 2 is communicated with the top of the primary spray washing tower 4 through the vaporization cooling flue 3, and the lower part of the primary spray washing tower 4 and the top of the secondary spray washing tower 7 are adjusted by the system. The pressure pipe 6 is communicated, and the lower part of the secondary spray washing tower 7 is communicated with the lower end of the annular slot venturi 11 through the first flue gas pipeline 9; , the annular slit venturi 11 and the dust removal pipe 12 are communicated th...

Embodiment 2

[0113] The structure of the converter primary dust removal system for reducing particulate matter emission is the same as that in Example 1, except that:

[0114] (1) The first-stage conical blade swirl plate is composed of 4 blades, the second-stage conical blade swirl plate is composed of 4 blades, and the third-stage conical blade swirl plate is composed of 6 blades;

[0115] (2) The blade bending inclination angle of the first-stage conical blade swirl plate is 7°; the blade bending inclination angle of the second-stage conical blade swirl plate is 7°; the blade bending inclination angle of the third-stage conical blade swirl plate is 9° ;

[0116] (3) There are 5 groups of dual-fluid aerosol spray guns inside the primary spray washing tower, and each group of dual-fluid aerosol spray guns has 4 nozzles; There are 5 nozzles in the pair of spray type spiral spray gun;

[0117] (4) There are 3 air-water atomizing spray guns in the first flue gas pipeline;

[0118] (5) The...

Embodiment 3

[0130] The structure of the converter primary dust removal system for reducing particulate matter emission is the same as that in Example 1, except that:

[0131] (1) The first-stage conical blade swirl plate is composed of 5 blades, the second-stage conical blade swirl plate is composed of 5 blades, and the third-stage conical blade swirl plate is composed of 7 blades;

[0132] (2) The blade bending inclination angle of the first-stage conical blade swirl plate is 9°; the blade bending inclination angle of the second-stage conical blade swirl plate is 9°; the blade bending inclination angle of the third-stage conical blade swirl plate is 10° ;

[0133] (3) There are 6 groups of dual-fluid aerosol spray guns inside the primary spray washing tower, and each group of dual-fluid aerosol spray guns has 6 nozzles; the interior of the secondary spray washing tower is equipped with 4 sets of pair-spraying spiral spray guns, each with 6 nozzles. There are 3 nozzles for the pair of sp...

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Abstract

A primary dust removal system for a converter for reducing particulate matter emission and a method for using the same. The gas-water mist separator, the first cyclone dehydrator, the second cyclone dehydrator and the primary dust removal fan are connected in series in sequence; the method is as follows: during the converter steelmaking process, the primary dust removal fan is started, and the converter flue gas is sprayed in the primary spray washing tower, The secondary spray scrubber and the first flue gas pipeline are washed in sequence, accelerated by the annular slit venturi, and then sprayed with high-pressure steam to form water mist. The water flow is separated from the flue gas, and the flue gas is dehydrated by the first cyclone dehydrator and the second cyclone dehydrator, and then enters the primary dust removal fan. The method of the invention can ensure that the content of the particulate matter in the flue gas reaches 15mg / Nm 3 Below, the emission requirements are met.

Description

technical field [0001] The invention relates to the technical field of converter dust removal treatment, in particular to a converter primary dust removal system for reducing particulate matter emission and a method for using the same. Background technique [0002] In the process of oxygen blowing smelting in the converter, the molten iron and oxygen in the furnace chemically react to generate high temperature flue gas up to 1600℃, which is called converter gas, and its main components are CO, CO 2 , SO 2 , N 2 , O 2 It has the characteristics of high temperature, toxic, flammable and explosive, and high dust content; in the middle stage of smelting, the CO content is as high as 80% or more, and the iron-containing dust concentration reaches 150-200mg / Nm 3 , its calorific value is high, the quantity is large, and it is a valuable secondary energy. Effective recycling of converter gas can not only greatly reduce the production cost of the steelmaking process and realize n...

Claims

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Application Information

Patent Timeline
05 Aug 2022
Publication
CN113621752B
IPC
C21C5/40
CPC
C21C5/40; Y02P10/20
Inventors
朱苗勇; 刘志远