CN114104739A

CN114104739A - Blast furnace gas ash safe conveying system

Info

Publication number: CN114104739A
Application number: CN202111427746.7A
Authority: CN
Inventors: 宋云山; 王仲民; 李立彬; 薛理政; 刘玉平; 朱玉坤; 刘斌; 齐立东
Original assignee: Beijing Shougang Co Ltd
Current assignee: Beijing Shougang Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-03-01

Abstract

The invention relates to the technical field of blast furnace ash conveying, and provides a blast furnace gas ash safe conveying system which is arranged on one side of a dust remover and comprises a gas pump, a storage bin and an external control cabinet, wherein an inlet of the gas pump is communicated with a discharge pipe of the dust remover through a first pipeline, a first control valve is arranged on the first pipeline, the interior of the storage bin is communicated with an outlet of the gas pump through a second pipeline, a pressure detector is arranged on the upper part of the inner wall of the storage bin, and the external control cabinet is electrically connected with the gas pump, the first control valve and the pressure detector. The blast furnace gas ash safe conveying system provided by the invention can not cause gas ash dust raising when the gas ash is discharged, and can not cause the risk of gas leakage.

Description

Blast furnace gas ash safe conveying system

Technical Field

The invention relates to the technical field of blast furnace ash conveying, in particular to a blast furnace gas ash safe conveying system.

Background

The crude gas produced in blast furnace smelting is discharged through a downcomer, and in order to separate the gas ash from the crude gas, a dust remover is generally arranged at the outlet of the downcomer. The dust separator is typically a gravity separator or a cyclone. The gas ash in the crude gas is separated from the gas through the dead weight or the centrifugal force when the crude gas passes through the dust remover, the gas ash is discharged through an ash discharge pipe at the lower part of the dust remover, and the separated primary purified gas is discharged through an air outlet pipe of the dust remover and enters the next procedure for continuous dust removal.

Because the volume of the dust remover is limited, the gas ash in the dust remover needs to be discharged every day to meet the production requirement, the gas ash in the dust remover is subjected to operation under pressure in the tank body when being discharged, most iron works adopt a stirring cage humidifier to discharge the dust of the dust remover, gas ash is inevitably generated in the operation, and the risk of gas leakage exists.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a blast furnace gas ash safe conveying system, so that gas ash can not be raised when the gas ash is discharged, and the risk of gas leakage can not exist.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a blast furnace gas ash safety conveying system, sets up the one side at the dust remover, including gas pump, feed bin and external control cabinet, the entry of gas pump with through first pipeline intercommunication between the discharge tube of dust remover, install first control valve on the first pipeline, the inside of feed bin with through second pipeline intercommunication between the export of gas pump, the pressure detector is installed on the upper portion of the inner wall of feed bin, the external control cabinet with the gas pump first control valve with the equal electricity of pressure detector is connected.

Further, still include the charge level indicator, the charge level indicator is installed on the pump body of gas pump, be used for detecting the raw materials volume in the pump body, the charge level indicator with the external control cabinet electricity is connected.

Further, the dust remover also comprises a second control valve, wherein the second control valve is arranged on the discharge pipe of the dust remover and is electrically connected with the external control cabinet.

Further, the first control valve is opened or closed in synchronization with the second control valve.

Further, the first control valve is a pneumatic feed valve.

Further, the second control valve is a single-acting pneumatic ball valve.

Further, still include and stir cage humidification machine, stir cage humidification machine sets up in the dust remover the below of discharge tube.

Further, the gas pump is located below the dust remover.

The invention has the beneficial effects that: according to the safe blast furnace gas ash conveying system, when the safe blast furnace gas ash conveying system works, the gas pump improves conveying power, and gas ash discharged from the discharge pipe of the dust remover sequentially passes through the first pipeline, the gas pump and the second pipeline and finally enters the storage bin for storage. The whole conveying process is fully sealed, so that gas ash can not be blown out when the gas ash is discharged, and the risk of gas leakage can not exist.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a dust collector;

FIG. 3 is a schematic view of the gas pump;

fig. 4 is a schematic structural diagram of a storage bin.

Reference numerals: 10-blast furnace, 11-downcomer, 20-deduster, 21-discharge pipe, 22-second control valve, 30-gas pump, 31-first pipeline, 32-second pipeline, 33-first control valve, 34-level indicator, 40-bunker, 41-pressure detector and 50-stirring cage humidifier.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In this application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; can be mechanically connected or connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "horizontal," "top," "bottom," "upper," "lower," "inner" and "outer" and the like refer to orientations and positional relationships illustrated in the drawings, which are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or components must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

As shown in FIGS. 1 to 4, the present invention provides a blast furnace gas ash safe conveying system, which is provided at one side of a blast furnace 10 and a dust remover 20, and an air outlet of the blast furnace 10 is communicated with an inlet of the dust remover 20 through a downcomer 11. The dust collector 20 has a discharge pipe 21 for discharging gas ash and an outlet pipe for discharging primary purified gas.

The system comprises a gas pump 30, a storage bin 40 and an external control cabinet. The inlet of the gas pump 30 is communicated with the discharge pipe 21 of the dust collector 20 through a first pipe 31. A first control valve 33 is mounted on the first pipe 31. The interior of the storage bin 40 is communicated with the outlet of the gas pump 30 through a second pipeline 32. A pressure detector 41 is installed on an upper portion of an inner wall of the bin 40 for detecting whether the gas ash in the bin 40 is over-pressurized. The external control cabinet is electrically connected with the gas pump 30, the first control valve 33 and the pressure detector 41.

The specific working process is as follows: in operation, the gas pump 30 increases the delivery power. The gas ash discharged from the discharge pipe 21 of the dust collector 20 sequentially passes through the first pipe 31, the gas pump 30 and the second pipe 32, and finally enters the storage bin 40 for storage. The whole conveying process is fully sealed, so that gas ash can not be blown out when the gas ash is discharged, and the risk of gas leakage can not exist.

When the pressure detector 41 detects the overpressure of the gas ash in the silo 40, an overpressure signal is sent to the external control cabinet. And then the external control cabinet controls the gas pump 30 to stop working and controls the first control valve 33 to close at the same time, so that the conveying operation is stopped, and the working safety is ensured.

In one embodiment, a level gauge 34 is further included, the level gauge 34 is mounted on the pump body of the gas pump 30 and is used for detecting the amount of the raw material in the pump body, and the level gauge 34 is electrically connected with an external control cabinet. When the material amount in the pump body of the gas pump 30 is zero, that is, when the material level is empty, it indicates that the gas ash is no longer discharged from the discharge pipe 21 of the dust remover 20, and the material level gauge 34 sends a material level empty signal to the external control cabinet. Then the external control cabinet controls the gas pump 30 to stop working and controls the first control valve 33 to close at the same time, thereby stopping the conveying operation and further ensuring the working safety.

In one embodiment, a second control valve 22 is further included, and the second control valve 22 is installed on the discharge pipe 21 of the dust separator 20 and electrically connected to an external control cabinet. When the external control cabinet receives an overpressure signal and/or a material empty signal, the second control valve 22 is controlled to be closed.

In one embodiment, the first control valve 33 is opened or closed in synchronization with the second control valve 22 for external control cabinet control.

In one embodiment, the first control valve 33 is a pneumatic feed valve.

In one embodiment, the second control valve 22 is a single-acting pneumatic ball valve. The single-acting pneumatic ball valve is automatically closed when the system is powered off, and can effectively isolate the dust remover from the ash conveying system to prevent the blast furnace gas from leaking when the system is abnormal, thereby ensuring the safe operation of the blast furnace.

In one embodiment, a stirring cage humidifier 50 is further included, and the stirring cage humidifier 50 is disposed below the discharge pipe 21 of the dust remover 20. The existing stirring cage humidifier 50 is reserved and used when the blast furnace 10 is shut down for maintenance or the system can not normally convey ash.

In one embodiment, the gas pump 30 is located below the precipitator 20.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a blast furnace gas ash safe conveying system, sets up the one side at the dust remover, its characterized in that: including gas pump, feed bin and external control cabinet, the entry of gas pump with through first pipeline intercommunication between the discharge tube of dust remover, install first control valve on the first pipeline, the inside of feed bin with through second pipeline intercommunication between the export of gas pump, the pressure detector is installed on the upper portion of the inner wall of feed bin, the external control cabinet with the gas pump first control valve with the equal electricity of pressure detector is connected.

2. The blast furnace gas ash safe conveying system according to claim 1, characterized in that: still include the charge level indicator, the charge level indicator is installed on the pump body of gas pump, be used for detecting the raw materials volume in the pump body, the charge level indicator with the external control cabinet electricity is connected.

3. The blast furnace gas ash safe conveying system according to claim 1, characterized in that: the dust remover further comprises a second control valve, wherein the second control valve is installed on the discharge pipe of the dust remover and is electrically connected with the external control cabinet.

4. The blast furnace gas ash safety conveying system according to claim 3, wherein: the first control valve is opened or closed in synchronization with the second control valve.

5. The blast furnace gas ash safe conveying system according to claim 1, characterized in that: the first control valve is a pneumatic feed valve.

6. The blast furnace gas ash safety conveying system according to claim 3, wherein: the second control valve is a single-acting pneumatic ball valve.

7. The blast furnace gas ash safe conveying system according to claim 1, characterized in that: the dust remover is characterized by further comprising a stirring cage humidifier, wherein the stirring cage humidifier is arranged below the discharging pipe of the dust remover.

8. The blast furnace gas ash safe conveying system according to claim 1, characterized in that: the gas pump is located below the dust remover.