CN216972584U

CN216972584U - Gas recovery device of steel converter

Info

Publication number: CN216972584U
Application number: CN202220750474.8U
Authority: CN
Inventors: 刘继光; 杨旭东; 王大伟; 张�杰
Original assignee: Inner Mongolia Yaxinlong Shunde Steel Co ltd
Current assignee: Inner Mongolia Yaxinlong Shunde Steel Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-07-15
Anticipated expiration: 2032-03-31

Abstract

The utility model provides a steelmaking converter coal gas recovery unit, which comprises an outer shell, the centre of shell body is fixed with the decurrent toper cover of opening, the top of toper cover is equipped with the gas vent, install temperature control valve on the gas vent, temperature sensor on the temperature control valve establishes in the toper cover, be equipped with the heat exchange tube on the inner wall of toper cover, the lower extreme intercommunication of heat exchange tube has the water inlet that passes the shell body, the upper end intercommunication of heat exchange tube has the delivery port that passes the shell body, the lower extreme of toper cover is equipped with the intake pipe, and the intake pipe passes the blast pipe intercommunication of shell body and converter, the top of shell body is equipped with the blast pipe, install the relief valve on the blast pipe, install the draught fan in the shell body of blast pipe lower extreme. The utility model provides a steelmaking converter coal gas recovery unit concentrates on coal gas in the toper cover, through the cooling water to the coal gas heat transfer, opens temperature-sensing valve after coal gas reaches collection storage temperature. The gas residence time is controlled, so that the cooling efficiency is improved, and the collection and storage temperature of the gas is conveniently controlled.

Description

Gas recovery device of steel converter

Technical Field

The application relates to a technology for recovering coal gas of a steelmaking converter, in particular to a device for recovering coal gas of the steelmaking converter.

Background

The converter steelmaking is characterized in that molten iron, scrap steel and ferroalloy are used as main raw materials, and the steelmaking process is completed in the converter by means of heat generated by physical heat of molten iron and chemical reaction among molten iron components. In the process of steelmaking, air or oxygen is required to be blown into the converter, and carbon and oxygen reactions are generated between carbon elements in molten iron and oxygen during steelmaking, so that carbon monoxide, namely coal gas, is generated.

The converter steelmaking needs to recycle the coal gas, and the recycled coal gas is usually stored in a coal gas cabinet. But the coal gas needs to be cooled and dedusted before being recovered and stored.

The existing recycling device enables cooling water to exchange heat with coal gas passing through a heat exchange tube through circulation of the cooling water, the coal gas flowing through the heat exchange tube is cooled, the coal gas is in a state of flowing all the time, the retention time at the heat exchange tube is limited, the cooling efficiency is low, and the collection and storage temperature of the coal gas cooling cannot be controlled.

SUMMERY OF THE UTILITY MODEL

The application provides a steelmaking converter coal gas recovery unit for it is low to solve current recovery unit heat exchange efficiency, and can not control the problem of collecting storage temperature behind the coal gas heat transfer.

The application provides a steelmaking converter gas recovery unit, which comprises an outer shell, the centre of shell body is fixed with the downward toper cover of opening, the top of toper cover is equipped with the gas vent, install temperature-sensing valve on the gas vent, temperature sensor on the temperature-sensing valve establishes in the toper cover, be equipped with the heat exchange tube on the inner wall of toper cover, the lower extreme intercommunication of heat exchange tube has the water inlet that passes the shell body, the upper end intercommunication of heat exchange tube has the delivery port that passes the shell body, the lower extreme of toper cover is equipped with the intake pipe, and the intake pipe passes the blast pipe intercommunication of shell body and converter, the top of shell body is equipped with the blast pipe, install the relief valve on the blast pipe, install the draught fan in the shell body of blast pipe lower extreme, install the flowmeter that is used for monitoring gas flow in the intake pipe 9.

Optionally, the upper end of toper cover is equipped with the shower with the water source intercommunication, install the shower nozzle on the shower nozzle, the upper end at the gas vent is established to the shower nozzle, the umbrella-shaped water column of shower nozzle blowout falls on gas vent toper cover all around.

Optionally, the lower extreme of intake pipe is equipped with the baffle of sealing with the shell body inner wall and fixing, be formed with the cavity that is used for depositing the backward flow water in the shell body of baffle lower extreme, the back flow that has the intercommunication has been inserted on the shell body, the lower extreme at the baffle is established to the upper end of back flow, the lower extreme at the conical cover outer wall.

Optionally, a water pump is installed in the cavity at the lower end of the partition plate, a water outlet of the water pump is communicated with a circulating water pipe, and the circulating water pipe penetrates through the outer shell and is communicated with the spray pipe.

Optionally, a filter screen is arranged at the lower end of the partition plate, and the filter screen is arranged between the return pipe and the water pump.

Optionally, a drain valve is installed at the bottom of the outer shell.

Optionally, a flow guide plate is arranged between the conical cover and the air inlet pipe.

Optionally, the flow guide plate is conical, and the air inlet pipe is L-shaped and discharges coal gas to the top of the flow guide plate.

Optionally, the annular array on the outer conical surface of the flow guide plate has a plurality of splitter plates.

Compared with the prior art, the beneficial effect of steelmaking converter coal gas recovery unit that this application provided is:

gas is firstly concentrated in the conical cover through the temperature control valve, then the gas is discharged from the water outlet after heat exchange is carried out on the gas through cooling water entering the water inlet, and the temperature control valve is opened after the temperature sensor monitors that the gas reaches the collection and storage temperature. The gas residence time is controlled, the cooling efficiency is effectively improved, and the collection and storage temperature of the gas after heat exchange can be controlled.

The water for dust removal entering through the spray pipe is sprayed out through the spray head, the umbrella-shaped water column sprayed out by the spray head can form a complete water curtain, the coal gas passing through the water curtain is thoroughly removed dust, and the dust removal efficiency is high and the effect is better.

The dust removal water flows down along the outer wall of toper cover, and the bottom that the shell body was got back to in rethread backflow pipe flow is collected, and the dust removal water after the collection is beaten back to the shower by the water pump after through the filter screen filtration, and dust removal water can cyclic utilization, and resources are saved avoids extravagant.

The arrangement of the guide plate can effectively prolong the circulation path of the coal gas, so that the coal gas is more fully contacted with the heat exchange tube in the rising process, and the heat exchange efficiency is improved. And the flow distribution plate on the flow guide plate can make the guided coal gas more uniform, and the flow guide effect is better.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the internal structure of a gas recycling device of a steelmaking converter according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a cone cover of a gas recycling device of a steelmaking converter according to an embodiment of the present application;

FIG. 3 is an enlarged schematic view of a gas recycling device of a steelmaking converter according to an embodiment of the present application at the position A;

fig. 4 is a schematic view of the position of a splitter plate of a gas recycling device of a steelmaking converter according to an embodiment of the present application.

Description of reference numerals:

an outer shell 1; a conical cover 2; an exhaust port 3; a temperature control valve 4; a temperature sensor 5; a heat exchange pipe 6; a water inlet 7; a water outlet 8; an air inlet pipe 9; an exhaust pipe 10; a safety valve 11; a shower pipe 12; a shower head 13; a partition 14; a return pipe 15; a filter screen 16; a water pump 17; a circulating water pipe 18; a drain valve 19; a baffle 20; a diverter plate 21.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1 to 4, an embodiment of the present application provides a gas recycling device for a steelmaking converter, which includes an outer casing 1, wherein the outer casing 1 is integrally sealed for storing and cooling gas. The middle of the outer shell 1 is fixed with a conical cover 2 with a downward opening, and the conical cover 2 can effectively shield coal gas, so that the coal gas is gathered at the lower end of the conical cover 2 to facilitate cooling. The top of conical cover 2 is equipped with gas vent 3, install temperature-sensing valve 4 on the gas vent 3, temperature-sensing valve 4 passes through wire and external power source electric connection, and temperature-sensing valve 4 is the normal close state. The temperature sensor 5 on the temperature control valve 4 is arranged in the conical cover 2, and the temperature sensor 5 opens the temperature control valve 4 after detecting that the temperature of the coal gas in the conical cover 2 reaches the standard, so that the cooled coal gas is discharged through the exhaust port 3.

The inner wall of the conical cover 2 is provided with a heat exchange tube 6, the lower end of the heat exchange tube 6 is communicated with a water inlet 7 penetrating through the outer shell 1, the upper end of the heat exchange tube 6 is communicated with a water outlet 8 penetrating through the outer shell 1, water for heat exchange enters the heat exchange tube 6 from the water inlet 7, coal gas is cooled through heat exchange between the heat exchange tube 6 and the coal gas, and the water after heat exchange flows out from the water outlet 8.

The lower end of the conical cover 2 is provided with an air inlet pipe 9, the air inlet pipe 9 penetrates through the outer shell 1 to be communicated with an exhaust pipe of the converter, and coal gas in the converter enters the conical cover 2 through the air inlet pipe 9 to be cooled. An exhaust pipe 10 is arranged at the top of the outer shell 1, a safety valve 11 is mounted on the exhaust pipe 10, and the safety valve 11 can close and cut off a pipeline between the exhaust pipe 10 and a gas tank when necessary. An induced draft fan is installed in the outer shell 1 at the lower end of the exhaust pipe 10, and the coal gas after heat exchange and temperature reduction enters the coal gas cabinet through the exhaust pipe 10 to be stored through the diversion of the induced draft fan.

When the gas-gas converter is used, gas generated by the converter enters the outer shell 1 through the gas inlet pipe 9, and is gathered in the conical cover 2 due to the shielding of the conical cover 2. The specific heat capacity of water is great, makes the coal gas of high temperature cool off fast through hydroenergy, consequently, the cooling water in the heat exchange tube 6 gets into through water inlet 7, and cooling water flows through heat exchange tube 6, and the coal gas of high temperature cools off the temperature through heat exchange tube 6 that sets up in the conical cover 2, discharges by delivery port 8 after the cooling heat transfer again.

When the temperature of the coal gas in the conical cover 2 is detected by the temperature sensor 5 and cooled to a set value, the temperature sensor 5 controls the temperature control valve 4 to be opened, the coal gas rises and is discharged through the exhaust port 3, and the cooled coal gas is guided into the coal gas cabinet by the exhaust pipe 10 to be stored.

Optionally, the flow meter is arranged at the air inlet pipe 9 to monitor the flow of the coal gas, so that the entering amount of the coal gas is controlled, the flow of the cooling water is adjusted according to the entering amount of the coal gas, the amount of the coal gas in the outer shell 1 can be controlled, and the excessive coal gas in the outer shell 1 is avoided.

In this embodiment, the thermo valve 4 is normally closed, gas is collected in the conical cover 2, cooling water enters through the water inlet 7 to exchange heat with the gas, and then the gas is discharged from the water outlet 8, and when the temperature sensor 5 detects that the gas reaches the collection and storage temperature, the thermo valve 4 is opened. The temperature control valve 4 is opened from a closed state, and the gas stays in the outer shell 1 for cooling, so that sufficient contact time exists between the gas and cooling water, the cooling efficiency is effectively improved, and the collection and storage temperature after heat exchange of the gas can be controlled.

In a possible realization mode, the upper end of the conical cover 2 is provided with a spray pipe 12 communicated with a water source, and the spray pipe 12 is communicated with an external water source to provide dust removing water. Install shower nozzle 13 on the shower 12, shower nozzle 13 is established in the upper end of gas vent 3, shower nozzle 13 blowout umbelliform water column falls on gas vent 3 conical cover 2 all around. The coal gas dust removal water enters the outer shell 1 through the spraying pipe 12, is sprayed out by the spray head 13 to form an umbrella-shaped water column, and is washed and dedusted through the umbrella-shaped water column sprayed out by the spray head 13 when the coal gas exhausted from the exhaust port 3 rises, the umbrella-shaped water column can form a complete water curtain, the passed coal gas is thoroughly dedusted, and the dust removal efficiency is high and the effect is better.

In a possible implementation manner, a partition plate 14 fixed to the inner wall of the outer shell 1 in a sealing manner is arranged at the lower end of the air inlet pipe 9, a cavity for storing backflow water is formed in the outer shell 1 at the lower end of the partition plate 14, a backflow pipe 15 communicated with the outer shell 1 is inserted into the outer shell 1, the upper end of the backflow pipe 15 is arranged at the lowest position of the outer wall of the conical cover 2, and the lower end of the backflow pipe 15 is arranged at the lower end of the partition plate 14. The water for dust removal flows down to the bottom along the outer wall of the conical cover 2 after dust removal, and then flows into the cavity at the lower end of the partition plate 14 for storage and recovery through the flow guide of the return pipe 15, thereby saving water resources.

In a possible implementation mode, a water pump 17 is installed in a cavity at the lower end of the partition plate 14, and the water pump 17 is communicated with an external power supply through a lead to supply power. A water outlet of the water pump 17 is communicated with a circulating water pipe 18, and the circulating water pipe 18 penetrates through the outer shell 1 to be communicated with the spraying pipe 12. The dust removing water stored in the cavity is led into the spraying pipe 12 again through the circulating water pipe 18 by the water pump 17 for recycling, and dust particles in the coal gas are repeatedly washed.

In a possible realisation, the lower end of the partition 14 is provided with a filter screen 16, the filter screen 16 being arranged between the return pipe 15 and the water pump 17. The dust removal water flowing back from the return pipe 15 effectively reduces impurities through filtering of the filter screen 16, the flushing efficiency can be improved during recycling, meanwhile, the water flowing into the water pump 17 can be ensured to be cleaner, and the service life of the water pump 17 is prolonged.

In a possible implementation, a drain valve 19 is installed at the bottom of the outer casing 1, and when the water in the cavity at the lower end of the partition 14 is full, the excess water for dust removal can be discharged through the drain valve 19. Or the dust removing water in the cavity can be discharged for replacement when needed.

In a possible realization, a deflector plate 20 is provided between the conical hood 2 and the air intake pipe 9. The coal gas entering through the air inlet pipe 9 flows along the bottom of the guide plate 20 in a diffusion mode, so that the flow path of the coal gas can be prolonged, and the coal gas can be conveniently cooled.

In a possible realization, the deflector 20 is conical in shape, the inlet pipe 9 is L-shaped and discharges the gas towards the vertex of the deflector 20. The conical guide plate 20 can enable the coal gas to rise along the side wall of the conical cover 2, so that the diffused coal gas is matched with the conical cover, the coal gas is enabled to be in contact with the heat exchange tube 6 more fully in the rising process, and the heat exchange efficiency is improved.

In a possible implementation, the annular array on the outer conical surface of the baffle 20 has a plurality of splitter plates 21. The arrangement of the splitter plate 21 can make the distribution of the coal gas guided by the deflector plate 20 more uniform, and enhance the flow guiding effect.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. The utility model provides a steelmaking converter coal gas recovery unit, includes shell body (1), its characterized in that: the middle of the outer shell (1) is fixed with a conical cover (2) with a downward opening, the top of the conical cover (2) is provided with an exhaust port (3), the exhaust port (3) is provided with a temperature control valve (4), a temperature sensor (5) on the temperature control valve (4) is arranged in the conical cover (2), the inner wall of the conical cover (2) is provided with a heat exchange tube (6), the lower end of the heat exchange tube (6) is communicated with a water inlet (7) penetrating through the outer shell (1), the upper end of the heat exchange tube (6) is communicated with a water outlet (8) penetrating through the outer shell (1), the lower end of the conical cover (2) is provided with an air inlet pipe (9), the air inlet pipe (9) penetrates through the outer shell (1) and an exhaust pipe of a converter, the top of the outer shell (1) is provided with an exhaust pipe (10), and the exhaust pipe (10) is provided with a safety valve (11), an induced draft fan is installed in an outer shell (1) at the lower end of the exhaust pipe (10), and a flowmeter used for monitoring gas flow is installed on the air inlet pipe (9).

2. The steelmaking converter gas recovery device as claimed in claim 1, wherein: the upper end of toper cover (2) is equipped with shower (12) with the water source intercommunication, install shower nozzle (13) on shower (12), the upper end at gas vent (3) is established in shower nozzle (13), shower nozzle (13) blowout umbelliform water column falls on gas vent (3) toper cover (2) all around.

3. The steelmaking converter gas recovery device as claimed in claim 2, wherein: the lower extreme of intake pipe (9) is equipped with baffle (14) sealed fixed with shell body (1) inner wall, be formed with the cavity that is used for depositing the backward flow water in shell body (1) of baffle (14) lower extreme, back flow (15) of intercommunication have been inserted on shell body (1), the lower extreme at baffle (14) is established to the upper end of back flow (15) in the minimum of toper cover (2) outer wall, the lower extreme at baffle (14) is established to the lower extreme of back flow (15).

4. The steelmaking converter gas recovery device as claimed in claim 3, wherein: a water pump (17) is installed in a cavity at the lower end of the partition plate (14), a water outlet of the water pump (17) is communicated with a circulating water pipe (18), and the circulating water pipe (18) penetrates through the outer shell (1) to be communicated with the spray pipe (12).

5. The steelmaking converter gas recovery device as claimed in claim 4, wherein: the lower end of the clapboard (14) is provided with a filter screen (16), and the filter screen (16) is arranged between the return pipe (15) and the water pump (17).

6. The steelmaking converter gas recovery device as claimed in any one of claims 1 to 5, wherein: and a drain valve (19) is installed at the bottom of the outer shell (1).

7. The steelmaking converter gas recovery device as claimed in claim 1 or 2, wherein: a guide plate (20) is arranged between the conical cover (2) and the air inlet pipe (9).

8. The steelmaking converter gas recovery unit as claimed in claim 7, wherein: the flow guide plate (20) is conical, the air inlet pipe (9) is L-shaped, and coal gas is discharged to the top point of the flow guide plate (20).

9. The steelmaking converter gas recovery unit as set forth in claim 8, wherein: and a plurality of splitter plates (21) are arranged on the outer conical surface of the guide plate (20) in an annular array.