CN210367752U

CN210367752U - Monitoring and alarming device for ash level of gravity dust collector of blast furnace

Info

Publication number: CN210367752U
Application number: CN201921227033.4U
Authority: CN
Inventors: 姚绍志; 高鹏; 李华军; 汪天柱; 徐华勇
Original assignee: Maanshan Iron and Steel Co Ltd
Current assignee: Maanshan Iron and Steel Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-04-21
Anticipated expiration: 2029-07-31

Abstract

The utility model discloses a blast furnace gravity dust remover ash level monitoring alarm device, the dust that needs to uninstall when the dust accumulates A high position in the gravity dust remover, the inside A high position of gravity dust remover is provided with high-order temperature sensor, high-order temperature sensor passes through signal line connection comparing unit signal input part, comparing unit output passes through signal line connection high-order alarm. The utility model discloses the low ash level alarm system device of gravity dust remover can stop unloading the ash before low ash level takes place coal gas and dust and leaks outward, ensures the safety and stability production of blast furnace and operation region personnel's personal safety.

Description

Monitoring and alarming device for ash level of gravity dust collector of blast furnace

Technical Field

The invention relates to the technical field of remote ash discharge control of a gravity dust collector of a blast furnace.

Background

A blast furnace in the ferrous metallurgy industry can generate a large amount of dust in the production process, a blast furnace gravity dust collector is a primary dust collection device of a raw coke oven gas dust collection system, the dust collection principle is that the flow velocity of coal gas flow is suddenly reduced and the flow direction is changed, larger-particle dust is separated from the coal gas under the action of gravity and inertia force, the larger-particle dust is settled to the conical bottom part of the dust collector and is discharged to a stirring machine through an ash discharge device, and the dust collection rate can reach 60%.

During normal production, the blast furnace gravity dust collector generally adopts regularly to unload the ash, confirm the tank car during unloading and counterpoint the back, put down the flexible coupling, start the humidification agitator, open electric-hydraulic ball valve and unload the ash to suitable aperture, at whole ash unloading in-process, the ash level is important information that operating personnel need master in the gravity dust collector, the ash level decides the beginning and the stopping of the operation of unloading the ash in the gravity dust collector, also play the key role to blast furnace safety in production and prevent coal gas, dust leakage simultaneously. The previous method for judging the ash level in the gravity dust collector is mainly realized by experience or hand-touch of the shell temperature, but has the following defects:

1. the accuracy is not high, and misjudgment is easy to occur;

2. a relatively fixed full-time operator is required;

3. because the ash level condition in the gravity dust collector can not be monitored and accurately displayed in time, the fluctuation of air flow in the blast furnace can cause the ash amount in the gravity dust collector to be too low along with the reduction of the ash level in the ash discharging process, and the serious accidents of coal gas leakage, large amount of dust leakage and the like are caused.

Disclosure of Invention

The invention aims to solve the technical problem of realizing a low ash level alarm system device of a gravity dust collector, which prevents serious accidents such as gas and dust leakage and the like caused by too low ash level in the ash discharging process.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a blast furnace gravity dust remover grey level monitoring alarm device, the dust that needs to uninstall when the dust accumulates A high position in the gravity dust remover, the inside A high position of gravity dust remover is provided with high-order temperature sensor, high-order temperature sensor passing signal line connection comparing element signal input part, comparing element output passing signal line connection high level alarm.

The dust that needs the uninstallation dust when B high position is accumulated to dust in the gravity dust remover, B high position is located A high position below, the inside B high position of gravity dust remover is provided with low level temperature sensor, low level temperature sensor passes through signal line connection comparing unit signal input part, comparing unit output passes through signal line connection low level alarm.

The low ash level alarm system device of the gravity dust collector can stop ash discharge before coal gas and dust leak at the low ash level, and ensures safe and stable production of the blast furnace and personal safety of personnel in an operation area.

Drawings

The following is a brief description of the contents of each figure in the description of the present invention:

FIG. 1 is a schematic diagram of a monitoring and alarming device for the ash level of a gravity dust collector of a blast furnace.

Detailed Description

The following description of the embodiments with reference to the drawings is provided to describe the embodiments of the present invention, and the embodiments of the present invention, such as the shapes and configurations of the components, the mutual positions and connection relationships of the components, the functions and working principles of the components, the manufacturing processes and the operation and use methods, etc., will be further described in detail to help those skilled in the art to more completely, accurately and deeply understand the inventive concept and technical solutions of the present invention.

The utility model discloses the temperature that the temperature measurement galvanic couple (temperature sensor) of utilizing to install different positions in the vertical direction of gravity dust remover measured is trailed, and the galvanic couple temperature that the gravity ash covered in the gravity dust remover descends because of the deposition temperature of gravity ash gradually, will be less than the coal gas temperature, according to the relation of the temperature that the temperature measurement galvanic couple at ash level and different positions was surveyed, sets for audible and visual alarm signal, and in time close the unloading valve and stop unloading grey operation can.

And an operator judges the height of the ash level in the gravity dust collector according to the temperature change of each key point. The method has the advantages that 1, a fixed full-time operator does not need to judge the ash level by body feeling, 2, the ash level judgment accuracy is high, and 3, the gas leakage accident caused by too low ash level can be prevented.

The height A and the height B are determined according to the size of the gravity dust collector, the gravity dust collector generally has the technical requirements of dust discharging and dust discharging stopping, and the height A and the height B are set according to the requirements. The comparison unit is a device for acquiring signals of the temperature sensor, is used for comparing the acquired signals with threshold values, can adopt a chip to perform signal processing, can also be completed by a comparator of an analog circuit, and finally outputs two paths of alarm signals which respectively refer to a high-level alarm and a low-level alarm, so that the alarm is performed in different intervals.

The device controls the ash level in the gravity dust collector, thereby not only meeting the process requirements of safe and stable production of the blast furnace, but also meeting the safe operation requirements of a gas treatment system.

The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.

Claims

1. The utility model provides a blast furnace gravity dust remover ash level monitoring alarm device, need uninstallation dust when the dust accumulates A high position in the gravity dust remover, its characterized in that: a high-order temperature sensor is arranged at the A height position in the gravity dust collector, the high-order temperature sensor is connected with a signal input end of a comparison unit through a signal line, and an output end of the comparison unit is connected with a high-order alarm through a signal line.

2. The ash level monitoring and alarming device of the blast furnace gravity dust collector according to claim 1, characterized in that: the dust that needs the uninstallation dust when B high position is accumulated to dust in the gravity dust remover, B high position is located A high position below, the inside B high position of gravity dust remover is provided with low level temperature sensor, low level temperature sensor passes through signal line connection comparing unit signal input part, comparing unit output passes through signal line connection low level alarm.