CN215887088U

CN215887088U - Air inlet dust removal device of blast furnace gas pressure regulating valve group

Info

Publication number: CN215887088U
Application number: CN202121562049.8U
Authority: CN
Inventors: 王松伟; 王朝飞
Original assignee: Hebei Xinda Iron and Steel Group Co Ltd
Current assignee: Hebei Xinda Iron and Steel Group Co Ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2022-02-22
Anticipated expiration: 2031-07-09

Abstract

The utility model discloses an air inlet dust removal device of a blast furnace gas pressure regulating valve group, which comprises a gas pipeline, a dust settling chamber, a settling inclined pipe and an ash bin; the gas pipeline comprises a vertical pipe section and a horizontal pipe section which are communicated, and a pressure regulating valve is arranged on the horizontal pipe section; the dust settling chamber is funnel-shaped and is communicated with the lower end of a communication part of the vertical pipe section and the horizontal pipe section; the sedimentation inclined pipe is obliquely arranged and communicated with the lower opening of the dust sedimentation chamber; the ash bin is communicated with the lower opening of the settling inclined tube. The device can effectively reduce the content of dust in the coal gas, and effectively prevent the situation that residual dust in the coal gas enters the pressure regulating valve group to break down the valve; the accident that equipment is damaged due to high dust content in blast furnace gas to cause shutdown is avoided; the coal gas dust removing device has the characteristics of simple structure, high dust removing efficiency, less residual dust in coal gas and the like, improves the stability of production and operation, and reduces the probability of fault occurrence.

Description

Air inlet dust removal device of blast furnace gas pressure regulating valve group

Technical Field

The utility model relates to a dust removal device, in particular to an air inlet dust removal device of a blast furnace gas pressure regulating valve group.

Background

In the production process of iron making, a blast furnace is an extremely important production device and is responsible for fusing iron ore, coke and flux together to carry out chemical reaction so as to manufacture required pig iron, byproduct blast furnace gas and the like; the blast furnace gas produced is raw gas with large dust content, coarse particles of the blast furnace raw gas are removed by gravity dust removal, and then the blast furnace raw gas is filtered by dry cloth bag dust removal to obtain raw gas with dust content less than or equal to 10mg/m³The tail end of the clean gas pipe network is provided with a pressure regulating valve group, and the pressure regulating valve group has the function of stabilizing the pressure of blast furnace gas which is an additional product generated by blast furnace smelting to about 240kpa required by the production process. Firstly, coal gas generated by a blast furnace enters a blast furnace pressure regulating valve group after being filtered by a cloth bag in a dry method, the pressure of the coal gas is stabilized to the required pressure through the opening of a valve of the pressure regulating valve group, the cloth bag is easy to puncture by the generated high-flow-rate coal gas after long-term scouring, the scouring of the valve of the pressure regulating valve group by the dust-containing gas after the puncture is increased, and the outside of the valve is leaked due to long-term scouring, so that the production stop of the blast furnace is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an air inlet dust removal device of a blast furnace gas pressure regulating valve group, which has a good dust removal effect.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the device comprises a gas pipeline, a dust settling chamber, a settling inclined pipe and an ash bin; the gas pipeline comprises a vertical pipe section and a horizontal pipe section which are communicated, and a pressure regulating valve is arranged on the horizontal pipe section; the dust settling chamber is funnel-shaped and is communicated with the lower end of a communication part of the vertical pipe section and the horizontal pipe section; the sedimentation inclined pipe is obliquely arranged and communicated with the lower opening of the dust sedimentation chamber; the ash bin is communicated with the lower opening of the settling inclined tube.

The settling inclined tube is obliquely arranged towards the front lower part of the coal gas flowing direction.

Damping springs are connected to the lower portions of the two ends of the pressure regulating valve in a jacking mode through the transverse pipe sections.

The dust blocking net is arranged in the gas pipeline above the dust settling chamber; along the gas circulation direction, the lower part of the ash blocking net inclines forwards.

An ash discharging opening is arranged below the ash bin, and an ash discharging valve is communicated with the ash discharging opening.

A level meter is arranged at the inner lower part of the dust settling chamber.

The utility model also comprises a CPU; the charge level indicator is connected with a signal input end of the CPU; the ash discharge valve is an electromagnetic valve and is connected with the signal output end of the CPU. The device also comprises a warning device; the warning device is connected with the signal output end of the CPU.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: according to the utility model, the dust settling chamber is arranged below the joint position of the vertical pipe section and the horizontal pipe section, so that when coal gas generated by the blast furnace passes through the joint position of the vertical pipe section and the horizontal pipe section, the coal gas flow is reversed, and the residual dust in the coal gas falls into the dust settling chamber under the action of gravity in the vertical direction; then falls into an ash bin through a settling inclined pipe; thereby effectively processing and collecting the residual dust in the coal gas. According to the utility model, the dust in the dust bin is enabled to float upwards to the dust settling chamber again due to the stirring of the coal gas flow through the inclined settling inclined pipe, so that part of dust is effectively prevented from entering the coal gas again, and the dust amount in the coal gas is further reduced. The utility model can effectively reduce the content of dust in the coal gas and effectively prevent the residual dust in the coal gas from entering the pressure regulating valve group to break down the valve; the accident that equipment is damaged due to high dust content in blast furnace gas to cause shutdown is avoided; the coal gas dust removing device has the characteristics of simple structure, high dust removing efficiency, less residual dust in coal gas and the like, improves the stability of production and operation, and reduces the probability of fault occurrence.

In addition, the novel device is also additionally provided with a CPU control part and a detection part; the detection part can detect the accumulation condition of dust in time and transmit the data to the CPU, and the CPU selects to switch the ash discharge valve according to the received data so as to clean the dust in the ash bin; the labor intensity of workers is greatly reduced, the automation degree is improved, and the smooth production operation is ensured.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

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

fig. 2 is a schematic diagram of the circuit structure of the present invention.

In the figure: a gas pipeline 1; a vertical pipe section 11; a transverse section 12; an ash blocking net 2; a pressure regulating valve 3; a damping spring 4; an ash bin 5; an ash discharge valve 6; a settling inclined pipe 7; a level gauge 8; a dust settling chamber 9; a warning device 10; a CPU 13; a first relay J1; a first relay normally open control contact J1-1; a first transistor VT 1; a second relay J2; a normally open control contact J2-1 of the second relay; a second transistor VT 2.

Detailed Description

As shown in fig. 1, the air inlet dust removing device of the blast furnace gas pressure regulating valve group comprises a gas pipeline 1, a dust settling chamber 9, a settling inclined pipe 7 and an ash bin 5. The gas pipeline 1 comprises a vertical pipe section 11 and a horizontal pipe section 12 which are communicated; the vertical pipe section 11 is vertically arranged, the horizontal pipe section 12 is horizontally arranged, the front end of the horizontal pipe section 12 is connected with the lower end of the vertical pipe section 11, the front end of the horizontal pipe section 12 is provided with a pressure regulating valve 3, and the pressure regulating valve 3 is communicated with a blast furnace pressure regulating valve group; the coal gas flows through the vertical pipe section 11 from top to bottom, then flows through the horizontal pipe section 12 from back to front, and enters the blast furnace pressure regulating valve group after passing through the pressure regulating valve 3. The damping springs 4 are respectively connected to the lower portions of the two ends of the pressure regulating valve 3 of the transverse pipe section 12 in a propping mode and used for buffering vibration of the transverse pipe section 12 caused by pressure regulation of the pressure regulating valve 3 and preventing the gas pipeline 1 from being damaged by vibration.

As shown in fig. 1, the dust settling chamber 9 of the gas inlet dust removing device of the blast furnace gas pressure regulating valve group is funnel-shaped and is communicated with the lower end of a communication part of a vertical pipe section 11 and a horizontal pipe section 12; the upper opening of the settling inclined pipe 7 is communicated with the lower opening of the dust settling chamber 9, and the lower part of the settling inclined pipe is inclined forwards; the top of the ash bin 5 is communicated with the lower opening of the settling inclined pipe 7. An ash discharging opening is arranged below the ash bin 5, and an ash discharging valve 6 is communicated with the ash discharging opening. An ash blocking net 2 is arranged in the gas pipeline 1 above the dust settling chamber 9; the ash blocking net 2 is of a net structure and separates the gas pipeline 1; the lower part of the ash blocking net 2 is inclined forwards, and the lower part of the ash blocking net 2 is positioned at the front end of the upper opening of the dust settling chamber 9. Therefore, the dust blocking net 2 can block dust flowing through the coal gas, and the blocked dust falls into the dust settling chamber 9 below under the action of gravity due to the inclined arrangement of the dust blocking net 2, so that the dust in the coal gas is removed more effectively.

As shown in fig. 1, a level indicator 8 is arranged at the lower inner part of a dust settling chamber 9 of the gas pressure regulating valve group of the blast furnace, and is used for detecting dust in the dust settling chamber 9; the level indicator 8 can adopt a light emitting diode and a photosensitive diode which are arranged in a matching way. The ash discharge valve 6 of the device is an electromagnetic valve; the device also includes a warning device 10, such as a warning light or a warning bell. As shown in fig. 2, the device further comprises a control system, wherein the control system comprises a CPU13, a first relay J1, a first relay normally open control contact J1-1, a first triode VT1, a second relay J2, a second relay normally open control contact J2-1, and a second triode VT 2. The signal output end of the level indicator 8 is connected with a P1.0 port of the CPU 13; in this way, the level gauge 8 can transmit a signal to the CPU 13. The P2.0 port of the CPU13 is connected with the base electrode of a first triode VT 1; the emitter of the first triode VT1 is grounded, and the collector of the first triode VT1 is connected with a power supply after passing through a first relay J1; one end of the first relay normally open control contact J1-1 is connected with a power supply, and the other end is connected with the ash discharge valve 6 and then grounded. The P2.1 port of the CPU13 is connected with the base electrode of a second triode VT 2; the emitter of the second triode VT2 is grounded, and the collector of the second triode VT2 is connected with a power supply after passing through a second relay J2; one end of the normally open control contact J2-1 of the second relay is connected with the power supply, and the other end is grounded after being connected with the warning device 10.

As shown in fig. 1 and 2, the working process of the air inlet dust removing device of the blast furnace gas pressure regulating valve group is as follows: (1) the coal gas flows through the vertical pipe section 11 from top to bottom and then flows through the horizontal pipe section 12 from back to front; when the coal gas flows through the joint position of the vertical pipe section 11 and the horizontal pipe section 12, the flow direction is changed from vertical to horizontal, so that residual dust in the coal gas falls into the dust settling chamber 9 under the action of gravity and inertia in the vertical direction; and then falls into the ash bin 5 through a settling inclined pipe 7.

(2) The dust in the ash bin 5 is continuously accumulated and can be continuously accumulated in the sedimentation inclined tube 7 after being fully accumulated; after the sedimentation inclined tube 7 is fully piled, dust can be piled in the dust sedimentation chamber 9; the accumulated dust triggers the level gauge 8; the triggered material level meter 8 transmits a signal to the CPU13, and the CPU13 opens the ash discharge valve 6 and triggers the warning device 10; and after the ash discharge valve 6 is opened, the dust accumulated in the ash bin 5, the settling inclined tube 7 and the dust settling chamber 9 is discharged. The connection duration of the first relay J1 can be set as required, thereby controlling the ash discharge duration; after the set connection time length of the first relay J1 is reached, the first relay J1 is automatically switched off, and ash discharge is stopped.

Claims

1. The utility model provides a blast furnace gas pressure regulating valves's dust collector that admits air which characterized in that: which comprises a gas pipeline (1), a dust settling chamber (9), a settling inclined pipe (7) and an ash bin (5); the gas pipeline (1) comprises a vertical pipe section (11) and a horizontal pipe section (12) which are communicated, and the horizontal pipe section (12) is provided with a pressure regulating valve (3); the dust settling chamber (9) is funnel-shaped and is communicated with the lower end of the communicated part of the vertical pipe section (11) and the horizontal pipe section (12); the sedimentation inclined pipe (7) is obliquely arranged and communicated with the lower opening of the dust sedimentation chamber (9); the ash bin (5) is communicated with a lower opening of the sedimentation inclined tube (7).

2. The air inlet dust removal device of the blast furnace gas pressure regulating valve bank according to claim 1, characterized in that: the sedimentation inclined tube (7) is obliquely arranged towards the front lower part of the coal gas flowing direction.

3. The air inlet dust removal device of the blast furnace gas pressure regulating valve bank according to claim 1, characterized in that: and damping springs (4) are respectively connected to the lower parts of the two ends of the pressure regulating valve (3) of the transverse pipe section (12) in a jacking mode.

4. The air inlet dust removal device of the blast furnace gas pressure regulating valve bank according to claim 1, characterized in that: an ash blocking net (2) is arranged in the gas pipeline (1) above the dust settling chamber (9); along the gas circulation direction, the lower part of the ash blocking net (2) is inclined forwards.

5. The gas inlet dust removal device of the blast furnace gas pressure regulating valve bank according to any one of claims 1 to 4, which is characterized in that: an ash discharging opening is arranged below the ash bin (5), and an ash discharging valve (6) is communicated with the ash discharging opening.

6. The air inlet dust removal device of the blast furnace gas pressure regulating valve bank according to claim 5, characterized in that: a level meter (8) is arranged at the inner lower part of the dust settling chamber (9).

7. The air inlet dust removal device of the blast furnace gas pressure regulating valve bank according to claim 6, characterized in that: also comprises a CPU (13); the charge level indicator (8) is connected with a signal input end of the CPU (13); the ash discharge valve (6) is an electromagnetic valve and is connected with the signal output end of the CPU (13).

8. The air inlet dust removal device of the blast furnace gas pressure regulating valve bank according to claim 7, characterized in that: the device also comprises a warning device (10); the warning device is connected with the signal output end of the CPU (13).