CN211084831U

CN211084831U - Valve plate automatic control low negative pressure ignition device applied to iron-making sintering

Info

Publication number: CN211084831U
Application number: CN201921835478.0U
Authority: CN
Inventors: 张宏伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-07-24
Anticipated expiration: 2029-10-29

Abstract

The utility model provides a be applied to low negative pressure ignition of valve plate automatic control of ironmaking sintering, this be applied to low negative pressure ignition of valve plate automatic control of ironmaking sintering includes: a sintering machine trolley and a negative pressure balancing device; the negative pressure balancing device comprises an air box arranged below the sintering machine trolley, a discharge pipe connected with the air box and an air pipe connected with the discharge pipe; wherein, arrange the intraductal two electric butterfly valve that are provided with of material, be provided with rotatable bull stick in the trachea, the bull stick cover is equipped with a plurality of torsion spring who sets for intensity, just the bull stick still is connected with and is used for the switching tracheal baffle. The utility model has the advantages that: the ash after combustion in the sintering machine trolley can be discharged through the arranged discharging pipe; the purpose of keeping the negative pressure in the air box stable can be achieved through the arranged air pipe.

Description

Valve plate automatic control low negative pressure ignition device applied to iron-making sintering

Technical Field

The utility model relates to metallurgical industry iron ore sintering technical field especially involves a be applied to low negative pressure ignition of valve plate automatic control of ironmaking sintering.

Background

The purpose of sintering ignition is to supply enough heat to the surface layer of the sintering material to ignite and burn the solid carbon in the sintering material, simultaneously, the sintering material on the surface layer is dried, burned and sintered under the action of high-temperature flue gas to generate a certain liquid phase to be bonded into blocks to form sintering ore with a certain strength, and the sintering process is carried out from top to bottom by means of forced air draft.

The normal running of the sintering process and the quality of the sinter are directly influenced by the good or bad ignition effect, and the sintering ignition can meet the following requirements: a sufficiently high ignition temperature; a certain ignition time; proper ignition negative pressure; the content of O2 in the ignition flue gas is sufficient; and the ignition is uniform along the width direction of the trolley.

The sintering process requires micro-negative pressure ignition, namely, the static pressure in a hearth of a furnace is pointed to be micro-negative pressure, so that ignition flame is not trapped outwards or inwards. The effect of controlling the static pressure in the hearth to be below-50 Pa by micro negative pressure ignition is optimal, and the negative pressure of the air box corresponding to the ignition furnace is stabilized to be-7 KPa and optimal. The ignition negative pressure is too high or too low to be beneficial to sintering. The ignition negative pressure is too high, the flame of the ignition furnace is contracted inwards, cold air is sucked from the periphery of the ignition furnace, the temperature of a hearth is reduced, and the ignition effect of the edge of the trolley is poor; combustible components of ignition fuel are sucked into the material layer too early, and ignition heat on the surface layer is insufficient; the excessive air quantity is pumped to destroy the air permeability of the original material layer, increase the resistance of the material layer and increase the ash quantity entering the wind direction branch pipe. The ignition negative pressure is too low, the flame of the ignition furnace is splashed outwards, the combustion products of the ignition furnace cannot be completely pumped into the material layer, the energy is wasted, and the baffle plate of the trolley is burnt. However, when the pressure in the bellows is too low, the pressure in the bellows cannot be adjusted in time by the conventional negative pressure ignition device.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art and providing a valve plate automatic control low negative pressure ignition device applied to iron-making sintering.

The problem of current negative pressure ignition for the sintering machine can not stably maintain the interior negative pressure of bellows stable is solved.

The utility model discloses a realize through following technical scheme:

the utility model provides a be applied to low negative pressure ignition of valve plate automatic control of ironmaking sintering, this be applied to low negative pressure ignition of valve plate automatic control of ironmaking sintering includes: a sintering machine trolley and a negative pressure balancing device;

the negative pressure balancing device comprises an air box arranged below the sintering machine trolley, a discharge pipe connected with the air box and an air pipe connected with the discharge pipe; wherein, arrange the intraductal two electric butterfly valve that are provided with of material, be provided with rotatable bull stick in the trachea, the bull stick cover is equipped with a plurality of torsion spring who sets for intensity, just the bull stick still is connected with and is used for the switching tracheal baffle.

Preferably, the discharge pipe is in a linear shape, and the air pipe is in an arc shape.

Preferably, the position where the air pipe is connected with the discharge pipe is located at a set distance above the two electric butterfly valves.

Preferably, a filter screen is arranged at one end of the air pipe connected with the discharge pipe.

The utility model has the advantages that: the ash after combustion in the sintering machine trolley can be discharged through the arranged discharging pipe; the purpose of keeping the negative pressure in the air box stable can be achieved through the arranged air pipe.

Drawings

FIG. 1 is a schematic structural view of an automatic valve plate control low negative pressure ignition device applied to iron making and sintering provided by the embodiment of the present invention;

fig. 2 is a schematic view of a baffle mounting structure of a valve plate automatic control low negative pressure ignition device applied to iron making sintering provided by the embodiment of the utility model.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

Firstly, in order to facilitate understanding of the valve plate automatic control low negative pressure ignition device applied to iron-making sintering provided by the embodiment of the application, an application scene is explained, and the valve plate automatic control low negative pressure ignition device applied to iron-making sintering provided by the embodiment of the application is used for stabilizing negative pressure in an air box in the ignition process of a sintering machine trolley; the negative pressure ignition device for the existing sintering machine can not stably maintain the stability of the negative pressure in the air box. The automatic control low negative pressure ignition device for the valve plate applied to iron making and sintering provided by the embodiment of the application is described below with reference to the attached drawings.

The utility model provides a be applied to low negative pressure ignition of valve plate automatic control of ironmaking sintering, this be applied to low negative pressure ignition of valve plate automatic control of ironmaking sintering is including the sintering machine platform truck 1 that is used for ironmaking sintering to and the negative pressure balancing unit of setting in this sintering machine platform truck below. The negative pressure balancing device can be arranged in a plurality according to actual conditions when being specifically arranged.

When negative pressure balancing unit specifically sets up, can refer to fig. 1, fig. 1 is the utility model discloses a be applied to the low negative pressure ignition of valve plate automatic control of ironmaking sintering's that embodiment provides a structural schematic diagram. As shown in fig. 1, the negative pressure balancing device includes an air box 2 disposed below a sintering pallet 1, a vertical discharge pipe 3 is fixedly connected to a bottom portion of the air box 2, two electric butterfly valves 5 are fixedly connected to the inside of the discharge pipe 3 from top to bottom, respectively, and an arc-shaped air pipe 4 is further connected to a side wall of the discharge pipe 3. The utility model provides a two electric butterfly valve 5 can be according to from the top down order name No. 1 butterfly valve and No. 2 butterfly valves respectively. When the material is outwards discharged through discharging pipe 3 to needs, can control 1 butterfly valve earlier and open, make the material that needs the discharge fall on 2 butterfly valves, then control 1 butterfly valve and close, 2 butterfly valves are opened, make the material on 2 butterfly valves discharge from discharging pipe 3. When materials are discharged, the air box 2 can be kept airtight by respectively opening and closing the two electric butterfly valves 5; in order to prevent the material from entering the air tube 4, a filter screen 9 is fixedly connected to the end of the air tube 4 connected to the discharge tube 3, so as to prevent the material from entering the air tube 4, and a baffle 8 for opening and closing the air tube 4 is connected to the air tube 4 to maintain the sealing performance of the air box 2. When specifically setting up two electric butterfly valve 5, still should be in the application the utility model discloses in set up the control switch who controls two electric butterfly valve 5 respectively, control relation between it is the same with the control relation among the prior art.

When baffle 8 is specifically set up in trachea 4, can refer to fig. 2, fig. 2 is the embodiment of the utility model provides a be applied to valve plate automatic control low negative pressure ignition device's of iron-smelting sintering baffle mounting structure sketch map. As can be seen from fig. 2, a rotatable rotating rod 6 is connected in the air tube 4, when the rotating rod 6 is specifically arranged, two opposite mounting holes can be formed in the inner wall of the air tube 4, a bearing is fixedly mounted in each mounting hole, and then two ends of the rotating rod 6 are respectively and fixedly connected with the inner rings of the corresponding bearings; the rotating rod 6 is sleeved with a plurality of torsion springs 7 with certain strength, and the rotating rod 6 is fixedly connected with a baffle plate 8. The torsion spring 7 is specifically arranged by sleeving the torsion spring 7 on the rotating rod 6, and then contacting one end of the torsion spring 7 with the upper surface of the baffle plate 8 and contacting the other end of the torsion spring 7 with the inner wall of the discharge pipe 3. In order to enable the baffle 8 to seal the air pipe 4, an attachment strap is fixedly connected in the air pipe 4, and when the baffle 8 horizontally seals the air pipe 4, one side of the baffle 8, which is far away from the rotating rod 6, is positioned above the attachment strap and attached to the attachment strap. The elasticity of a plurality of torsion springs 7 and the gravity of the baffle 8 in the utility model are exactly the same as the pressure difference generated when the pressure in the bellows 2 is-7 KPa. When the pressure in the bellows 2 is-7 KPa, the pressure difference generated inside and outside the bellows 2 just offsets the elasticity of the torsion springs 7 and the gravity of the baffle 8, at this time, the baffle 8 is horizontally positioned in the air pipe 4, and the baffle 8 seals the air pipe 4, so that the stable pressure in the bellows 2 is kept; when the pressure in the bellows 2 is less than-7 KPa, the pressure difference generated inside and outside the bellows 2 is greater than the elastic force of the torsion springs 7 and the gravity of the baffle 8, at this time, the baffle 8 is pushed to rotate upwards under the action of the pressure difference, so that the air pipe 4 is not closed, external air enters the bellows 2 through the air pipe 4 and the discharge pipe 3 until the pressure in the bellows 2 reaches-7 KPa again, and the pressure in the bellows 2 is kept stable. In order to enable the baffle plate 8 to better seal the air pipe 4, sealing rubber strips can be fixedly connected to the periphery of the baffle plate 8 respectively, so that the sealing performance is improved.

In the embodiments, the automatic control low-negative-pressure ignition device for the valve plate applied to iron-making sintering, provided by the embodiments of the present application, can adjust the pressure in the air box to a set value in time when the pressure in the air box is too low.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.

Claims

1. The utility model provides a valve plate automatic control low negative pressure ignition device for ironmaking sintering which characterized in that includes: a sintering machine trolley and a negative pressure balancing device;

2. The automatic valve plate control low-negative-pressure ignition device applied to ironmaking and sintering as claimed in claim 1, wherein the discharge pipe is linear in shape, and the air pipe is arc-shaped.

3. The automatic control low negative pressure ignition device for the valve plate applied to ironmaking and sintering as claimed in claim 1, wherein the position where the air pipe is connected with the discharge pipe is located at a set distance above the two electric butterfly valves.

4. The automatic-control low-negative-pressure ignition device for the valve plate applied to iron-making and sintering as claimed in claim 1, wherein a filter screen is arranged at one end of the air pipe connected with the discharge pipe.