CN-122015503-A - Coal dust vertical preheater collector

CN122015503ACN 122015503 ACN122015503 ACN 122015503ACN-122015503-A

Abstract

The invention belongs to the technical field of blast furnace ironmaking coal injection, and provides a coal dust vertical preheater collector. The invention comprises a main shell, a screening assembly, an upper converging disc, a speed reducing disc and a lower converging disc, wherein the screening assembly, the upper converging disc, the speed reducing disc and the lower converging disc are sequentially arranged in the main shell from top to bottom and are communicated, the screening assembly comprises two screens which are arranged up and down oppositely, and a driving mechanism for driving the two screens to move oppositely or oppositely, the upper converging disc comprises a conical cylinder and a first driving assembly for driving the upper converging disc to rotate, the speed reducing disc comprises a central disc, a central guide cone which is arranged on the central disc and extends upwards, a plurality of guide cone holes which are annularly and uniformly distributed on the central disc along the central guide cone, the lower converging disc comprises a fixed conical cylinder body and at least one inner deformation sleeve which is annularly and uniformly distributed on the inner side wall of the lower converging disc, and the inner deformation sleeve comprises a flexible sleeve and an adjusting mechanism for driving the inner deformation of the flexible sleeve. The device can solve the problems of easy blockage, unstable flow and uneven distribution when the pulverized coal is collected, and simultaneously has flexible regulation and control and can ensure the pulverized coal to be collected and blown stably and at a uniform speed.

Inventors

LIU ZHENGPING
MENG QINGLIN
LI CHANGBAO
LIU TIEZHU
MENG FANJIE

Assignees

北京中研环发环境技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260209

Claims (10)

1. The coal dust vertical preheater collector is characterized by comprising a main shell, and a screening assembly, an upper converging disc, a speed reducing disc and a lower converging disc which are sequentially arranged in the main shell from top to bottom and are communicated with each other; The screening assembly comprises two screens which are arranged up and down oppositely, and a driving mechanism for driving the two screens to move oppositely or oppositely; the upper confluence disc comprises a conical cylinder and a first driving assembly for driving the conical cylinder to rotate; the speed reducing disc comprises a central disc, a central guide cone arranged on the central disc and extending upwards, and a plurality of guide cone holes annularly and uniformly distributed on the central disc along the central guide cone; The lower confluence disc comprises a fixed conical cylinder body and at least one inner deformation sleeve member annularly and uniformly distributed on the inner side wall of the fixed conical cylinder body, wherein the inner deformation sleeve member comprises a flexible sleeve and an adjusting mechanism for driving the flexible sleeve member to deform.
2. The coal dust vertical preheater collector as set forth in claim 1, wherein the driving mechanism comprises a distance adjusting cylinder, a moving sleeve, an eccentric motor and a connecting spring, wherein the distance adjusting cylinder is connected with one screen to adjust the distance between the screens, the moving sleeve is arranged on two sides of the screen to limit, the connecting spring is arranged on a bottom plate of the moving sleeve, and the eccentric motor is abutted with the moving sleeve to provide vibration force.
3. The pulverized coal vertical preheater concentrator according to claim 1, wherein the first driving assembly comprises a driving motor, a gear and a gear ring fixed on the conical barrel, and the driving motor is meshed with the gear ring through the gear.
4. The collector of the vertical pulverized coal preheater as set forth in claim 1, wherein the aperture of the guide taper hole is wider at the top and narrower at the bottom, and the speed reducing disk is further provided with a plurality of peripheral guide grooves annularly and uniformly distributed on the peripheral surface of the central disk.
5. The coal dust vertical preheater collector as set forth in claim 1, wherein the adjusting mechanism comprises a hinge shaft and a built-in electric cylinder, one end of the built-in electric cylinder is fixed on the inner wall of the fixed conical cylinder body, the other end of the built-in electric cylinder is connected with the hinge shaft, one end of the hinge shaft is hinged with the inner wall of the cylinder body, the other end of the hinge shaft is abutted with the flexible sleeve, and the built-in electric cylinder stretches and contracts to drive the hinge shaft to swing so as to deform the flexible sleeve.
6. A pulverized coal vertical preheater collector according to any of claims 1 to 5, further comprising a control unit in signal connection with the drive mechanism, the first drive assembly and the adjustment mechanism.
7. The pulverized coal vertical preheater concentrator as set forth in claim 6, wherein said control unit is configured to receive a feed rate or a screening load signal and to adjust the rotational speed of said first drive assembly in synchronization with the amount of actuation of said adjustment mechanism in response thereto.
8. The pulverized coal vertical preheater concentrator according to claim 7, wherein the control unit is configured to increase the rotational speed of the cone and control the internal deformation sleeve to act in a direction to increase the flow cross section when the feed rate or load signal increases, and to make the opposite adjustment when the signal decreases.
9. The pulverized coal vertical preheater concentrator as set forth in claim 6, further comprising a distribution sensor disposed at the outlet of the lower converging disk, wherein the control unit is connected to the distribution sensor and configured to adjust the rotational speed of the first driving assembly in a closed loop according to distribution uniformity information fed back by the sensor.
10. The vertical preheater collector as set forth in claim 6, wherein a plurality of sets of control parameter sets matching different material characteristics are pre-stored in said control unit, said control unit further configured to receive a material characteristic selection signal and call up corresponding parameter sets to set vibration parameters of said driving mechanism, a reference rotational speed of said first driving assembly, and a reference motion amount of said adjustment mechanism.

Description

Coal dust vertical preheater collector Technical Field The invention relates to the technical field of blast furnace ironmaking coal injection, in particular to a coal dust vertical preheater collector. Background In the blast furnace ironmaking process, the pulverized coal is preheated and then blown into the furnace, so that the combustion efficiency is improved, and the energy consumption is reduced. The pulverized coal vertical preheater is a key device for realizing pulverized coal preheating, and generally comprises a plurality of vertically arranged preheating pipes. The pulverized coal heated by the preheating pipe needs to be collected and stably conveyed to the main injection pipe, and finally injected into the blast furnace. In the prior art, coal fines falling from a plurality of preheating tubes are typically collected in a simple conical hopper or straight barrel. The method has the obvious defects that firstly, a plurality of coal powder flows fall down at the collecting position at the same time and are easy to collide and accumulate, so that the flow is not smooth or even blocked, the production continuity is influenced, secondly, the coal powder flows are unstable and are unevenly distributed, uniform and stable injection is difficult to realize, the uniformity and the efficiency of coal powder combustion in a blast furnace are influenced, the smooth running and the energy conservation and consumption reduction of the blast furnace are not facilitated, furthermore, the coal powder flows cannot be effectively guided and evenly distributed by a simple collecting structure, the coal powder is possibly overheated locally or insufficiently preheated in a preheater, and the integral preheating effect is influenced. Therefore, we propose a collecting device which can effectively prevent blockage, ensure stable and uniform collection and transportation of coal powder and promote uniform distribution of the coal powder in the preheater so as to improve the overall performance of the vertical preheating system of the coal powder. Disclosure of Invention Aiming at the defects in the prior art, the invention provides the coal dust vertical preheater collector which is used for solving the defects of easy blockage, unstable flow and uneven distribution during coal dust collection and meeting the requirements of flexible regulation and control and ensuring stable and uniform collection and blowing of coal dust. The invention provides a coal dust vertical preheater collector which comprises a main shell, a screening assembly, an upper converging disc, a speed reducing disc and a lower converging disc, wherein the screening assembly, the upper converging disc, the speed reducing disc and the lower converging disc are sequentially arranged in the main shell from top to bottom and are communicated, the screening assembly comprises two screens which are oppositely arranged up and down, and a driving mechanism for driving the two screens to move relatively or oppositely, the upper converging disc comprises a conical cylinder and a first driving assembly for driving the upper converging disc to rotate, the speed reducing disc comprises a central disc, a central flow guiding cone which is arranged on the central disc and extends upwards, and a plurality of flow guiding cone holes which are annularly and uniformly distributed on the central disc along the central flow guiding cone, the lower converging disc comprises a fixed conical cylinder body and at least one inner deformation sleeve member which is annularly and uniformly distributed on the inner side wall of the lower converging disc, and the inner deformation sleeve member comprises a flexible sleeve and an adjusting mechanism for driving deformation of the flexible sleeve. The driving mechanism comprises a distance adjusting cylinder, a moving sleeve, an eccentric motor and a connecting spring, wherein the distance adjusting cylinder is connected with one screen to adjust the distance between the screens, the moving sleeve is arranged on two sides of the screen to limit, the connecting spring is arranged on a bottom plate of the moving sleeve, and the eccentric motor is abutted with the moving sleeve to provide vibration force. In practical application, the purpose of the design is to adjust the mesh spacing of the screen mesh, and meanwhile, the vibration sieving effect can be realized, so that massive and hardened massive substances in the pulverized coal can be sieved, vibrated and dispersed to harden the massive pulverized coal. Further, the first driving assembly comprises a driving motor, a gear and a gear ring fixed on the conical cylinder, and the driving motor is in meshed transmission with the gear ring through the gear. In practical use, the purpose of the design is to realize the rotation of the conical cylinder, so that the guiding of the pulverized coal can be further supported and concentrated when falling. Furthermore, the aperture of the