CN-122012849-A - Inertial dust removal device with multistage dynamic streamline baffle and dust removal method

Abstract

The invention discloses an inertial dust collector with a multistage dynamic streamline baffle, which comprises an inertial separation chamber, wherein an air inlet chamber and an air outlet chamber are respectively arranged on two opposite sides of the upper end of the inertial separation chamber, the upper part of the air inlet chamber is connected with a vaporization cooling flue, and the bottom of the inertial separation chamber is provided with an ash collecting hopper. The invention also discloses an inertial dust removal method with the multistage dynamic streamline baffle, and solves the problem of low dust removal efficiency of the existing dust removal device.

Inventors

• HUANG YANQIU
• ZHAO YIHANG
• ZHAO ZIFAN
• GUO JUNWEI
• DU QI
• WEI FANGFANG

Assignees

• 西安建筑科技大学

Dates

Publication Date

20260512

Application Date

20260316

Claims (8)

1. 1. The inertial dust collector with the multistage dynamic streamline baffle is characterized by comprising an inertial separation chamber (6), wherein an air inlet chamber (3) and an air outlet chamber (10) are respectively arranged on two opposite sides of the upper end of the inertial separation chamber (6), the upper part of the air inlet chamber (3) is connected with a vaporization cooling flue (2), and an ash collecting hopper (8) is arranged at the bottom of the inertial separation chamber (6).
2. 2. The inertial dust collector with the multistage dynamic streamline baffle according to claim 1, wherein an opening and closing mechanism (12) is arranged between the inertial separation chamber (6) and the dust collection hopper (8).
3. 3. The inertial dust collector with multistage dynamic streamline baffles according to claim 2, wherein a baffle (7) is arranged in the inertial separation chamber (6), and a herringbone inertial separation baffle (4) is arranged on one side of the baffle (7) and below the baffle (7).
4. 4. The inertial dust collector with multistage dynamic streamline baffles according to claim 3, wherein multistage streamline baffles (9) are arranged in the inertial separation chamber (6), and the streamline baffles (9) are positioned on the other side of the guide plate (7).
5. 5. The inertial dust collector with multistage dynamic streamline baffle according to claim 3, wherein the surface of said chevron inertial separation baffle (4) is provided with a groove structure.
6. 6. The inertial dust collector with multistage dynamic streamline baffles of claim 3, wherein the inner side wall of the inertial separation chamber (6) is a dust collecting wall surface (5), and a dust collecting channel (11) is arranged on the inner side of the dust collecting wall surface (5).
7. 7. The inertial dust collector with multistage dynamic streamline baffle according to claim 6, wherein the upper half part of the deflector (7) has smooth surface, and the lower half part of the deflector (7) is provided with a porous array.
8. 8. The inertial dust removal method with the multistage dynamic streamline baffle is characterized by comprising the following steps that flue gas enters an air inlet chamber (3) from a primary flue gas outlet (1) of a converter after being preliminarily cooled by a vaporization cooling flue (2), the flue gas flows through an inertial separation chamber (6) to collide with a herringbone inertial separation baffle (4) so as to realize flue gas diversion, particles passing through the herringbone inertial separation baffle (4) fall into an ash collecting hopper (8) by utilizing particles separated by a dust collecting wall surface (5) are collected into the ash collecting hopper (8) through a dust collecting channel (11), and purified flue gas is discharged from an air outlet chamber (10).

Description

Inertial dust removal device with multistage dynamic streamline baffle and dust removal method Technical Field The invention belongs to the technical field of flue gas treatment in the full-dry production process of a converter, relates to an inertial dust removal device with a multistage dynamic streamline baffle, and further relates to an inertial dust removal method with the multistage dynamic streamline baffle. Background In the converter steelmaking process, a large amount of high temperature converter gas of about 1500 ℃ is formed by molten iron oxygen blowing decarburization, which gas is reduced to about 650 ℃ to 850 ℃ after entering the gasification cooling flue from the converter, and carries a large amount of metal oxide particles. The recovery of the converter gas is one of core programs of the steel industry all the time, and is one of weak links of recovery and utilization. The efficient recovery of sensible heat and particulate matter resources of the part of flue gas is important for energy conservation and emission reduction of the steel industry, is one of the key links for realizing energy conservation and emission reduction of the steel industry, and is also a key content for comprehensive utilization of resources. At present, the cooling of converter gas in China mainly adopts a wet method (OG method) and a dry method (LT method). The wet method is to remove smoke dust in dust-containing airflow after the smoke is treated by atomized water, then to separate, concentrate, dewater and the like the sewage with the smoke dust, and the purified coal gas is recycled, but the mode of reducing the heat of the smoke by utilizing the phase change of water not only wastes a great amount of sensible heat of the smoke, but also increases the consumption of water. The dry method is to send high-temperature dust-containing gas into an evaporative cooler for cooling and coarse dust removal, then separate dust particles from the flue gas by means of gravity sedimentation, centrifugal force, inertial force and the like, and the purified dust can be directly used after being cooled. Although the method realizes low resistance of the system, avoids water pollution, still can have the problem that part of sensible heat is taken away in the form of evaporation latent heat, and meanwhile, the improper control of atomized water can bring risks of abrasion, scaling/blockage, entrainment of fog drops and the like, thereby influencing the operation stability of follow-up fine dust removing equipment (such as electric dust collectors, bag dust collectors and the like). The primary dust removal performance of the conventional converter dry dust removal by using the inertial separator is generally lower, the total separation efficiency is about 30%, and particularly the separation efficiency is lower than 10% for small-particle-size separation, for example, 25 μm, so that the dust removal performance of the separator needs to be optimized by optimizing the internal configuration of the separator, the running cost of a converter process is reduced, and the effects of energy conservation, emission reduction and comprehensive utilization of resources in the steel industry can be fully realized. Disclosure of Invention The invention aims to provide an inertial dust collector with a multistage dynamic streamline baffle, which solves the problem of low dust collection efficiency of the existing dust collector. It is another object of the present invention to provide a method of inertial dust collection with a multistage dynamic streamline baffle. The first technical scheme adopted by the invention is that the inertial dust collector with the multistage dynamic streamline baffle comprises an inertial separation chamber, wherein an air inlet chamber and an air outlet chamber are respectively arranged on two opposite sides of the upper end of the inertial separation chamber, the upper part of the air inlet chamber is connected with a vaporization cooling flue, and the bottom of the inertial separation chamber is provided with an ash collecting hopper. The first technical scheme of the invention is characterized in that: an opening and closing mechanism is arranged between the inertial separation chamber and the ash collecting hopper. The inertia separating chamber is internally provided with a guide plate, and one side of the guide plate and the lower part of the guide plate are respectively provided with a herringbone inertia separating baffle. The inertia separation chamber is internally provided with a multi-stage streamline baffle, and the streamline baffle is positioned at the other side of the guide plate. The surface of the herringbone inertial separation baffle is provided with a groove structure. The inner side wall of the inertial separation chamber is a dust collection wall surface, and a dust collection channel is arranged on the inner side of the dust collection wall surface. The upper half part of the guide pla