CN215337764U - Vortex-based degassing device - Google Patents

Abstract

The utility model discloses a vortex-based degassing device, wherein after flue gas generated by combustion is discharged from a flue gas discharge pipe of a smelting furnace and enters a secondary combustion chamber, a laser is started to carry out laser thermal ignition on the flue gas in the secondary combustion chamber, a combustion improver injection pipe is used for introducing a combustion improver into the secondary combustion chamber to improve the secondary combustion efficiency, the combustion improver is output to the secondary combustion chamber through a through hole, and the combustion improver output through the through hole can drive airflow in the secondary combustion chamber to form a vortex, so that the airflow flow is enhanced to improve the secondary combustion efficiency; the driving shaft of the servo motor rotates, the laser can carry out laser irradiation on the smoke in a large range during rotation, so that the smoke in a larger range can be irradiated and ignited, the laser is positioned in the closed cavity of the transparent cover and is isolated from the combustion area of the secondary combustion chamber, and the laser can be prevented from being burnt out by the smoke combusted in the secondary combustion chamber to a certain degree; and the exhaust gas after secondary combustion is output from the exhaust pipe.

Description

Vortex-based degassing device

Technical Field

The utility model relates to the technical field of industrial equipment, in particular to a degassing device based on vortex.

Background

In the use of some waste smelting furnaces, the flue gas discharged by the smelting furnaces often contains some flammable and explosive gases, and is one of the serious accidents of flue gas explosion. With the increasing strictness of the safety and the environmental protection of the waste smelting, the secondary combustion of the flue gas discharged by the smelting furnace is always a technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a vortex-based degassing device which can be used for carrying out secondary ignition on flue gas discharged by a smelting furnace.

A vortex-based degassing apparatus comprising a smelting furnace comprising a flue gas exit pipe;

the secondary combustion chamber is connected with the flue gas discharge pipe and is cylindrical;

the combustion improver injection pipe is internally communicated with a combustion improver and is provided with through holes, the through holes extend into the secondary combustion chamber, the through holes are sequentially distributed along the axial direction of the cylindrical secondary combustion chamber, and the air outlet direction of the through holes is not in the same direction with the radial direction of the secondary combustion chamber;

the ignition system comprises a servo motor, a laser and a transparent cover, wherein a driving shaft of the servo motor extends into the secondary combustion chamber, a laser seat is fixed at the tail end of the driving shaft, the laser is fixed on the laser seat, the transparent cover is fixed on the inner wall of the secondary combustion chamber and forms a closed cavity, and the tail end of the driving shaft, the laser seat and the laser are positioned in the closed cavity;

the secondary combustion chamber is also provided with an exhaust pipe.

Further, the closed cavity in the transparent cover is vacuum.

Furthermore, the transparent cover is filled with inert gas.

Furthermore, the combustion improver introduced into the combustion improver injection pipe is oxygen.

Furthermore, the device also comprises an oxygen storage tank, and an exhaust valve of the oxygen storage tank is connected with the combustion improver injection pipe.

The device further comprises a pressurization air pump, wherein the pressurization air pump is arranged on a connecting pipeline between the oxygen storage tank and the combustion improver injection pipe.

The utility model has the beneficial effects that: when the utility model is used, the smelting furnace discharges flue gas generated by combustion when carrying out certain smelting work, the flue gas possibly contains some flammable and explosive gases and is directly discharged to have great potential safety hazard, after the flue gas enters the secondary combustion chamber, the laser is started to carry out laser thermal ignition on the flue gas in the secondary combustion chamber, the combustion improver injection pipe introduces the combustion improver into the secondary combustion chamber to improve the secondary combustion efficiency, and the combustion improver is output to the secondary combustion chamber through the through hole; due to the arrangement mode of the combustion improver injection pipe and the through hole, the combustion improver output by the through hole drives the airflow in the secondary combustion chamber to form a vortex, so that the flue gas in the secondary combustion chamber can be fully stirred to ensure that the secondary combustion of the flue gas is more sufficient;

meanwhile, the servo motor can be started by a worker or automatically started, a driving shaft of the servo motor rotates to drive the laser seat and the laser to rotate, the laser can carry out laser irradiation on smoke in a large range during rotation, so that the smoke in a larger range can be irradiated and ignited, and a plurality of lasers can be preferably fixed on the laser seat, so that more laser beams can be emitted to irradiate more smoke; in some embodiments, the drive shaft cannot rotate for a plurality of turns due to the existence of the power supply circuit of the laser, so that the servo motor can adopt a stepping rotation method, for example, the servo motor rotates forwards and backwards for one turn, and then circulates in sequence to prevent the power supply circuit from being wound, and the power supply circuit is swept to ignite smoke in the secondary combustion chamber; the power supply circuit of the laser can be led out through the driving shaft or led out of the secondary combustion chamber from other positions; the transparent cover can be made of high-strength and high-melting-point glass and can be used for transmitting laser emitted by the laser, and the laser is positioned in the closed cavity of the transparent cover and is isolated from the combustion area of the secondary combustion chamber, so that the laser can be prevented from being burnt out by smoke combusted in the secondary combustion chamber to a certain extent; and the exhaust gas after secondary combustion is output from the exhaust pipe.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a cross-sectional view of a structure provided in accordance with an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the structure of FIG. 1;

fig. 3 is a left side sectional view of a portion of the structure of fig. 1.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.

A vortex-based degassing plant, as shown in fig. 1 and 2, comprising a smelting furnace 1, said smelting furnace 1 comprising a flue gas discharge pipe 2;

the secondary combustion chamber 3 is also included, the flue gas discharge pipe 2 is connected into the secondary combustion chamber 3, and the secondary combustion chamber 3 is in a barrel shape;

the combustion improver injection pipe 5 is internally communicated with a combustion improver, the combustion improver injection pipe 5 is provided with a through hole 501, the through hole 501 extends into the secondary combustion chamber 3, the through holes 501 are sequentially distributed along the axial direction of the cylindrical secondary combustion chamber 3, and the air outlet direction of the through hole 501 is not in the same direction with the radial direction of the secondary combustion chamber 3;

the ignition system comprises a servo motor 605, a laser 603 and a transparent cover 604, wherein a driving shaft 601 of the servo motor 605 extends into the secondary combustion chamber 3, a laser seat 602 is fixed at the tail end of the driving shaft 601, the laser 603 is fixed on the laser seat 602, the transparent cover 604 is fixed on the inner wall of the secondary combustion chamber 3 to form a closed cavity, and the tail end of the driving shaft 601, the laser seat 602 and the laser 603 are positioned in the closed cavity;

the secondary combustion chamber 3 is also provided with an exhaust pipe 7.

When the utility model is used, when the smelting furnace 1 carries out some smelting work, the flue gas generated by combustion is discharged from the flue gas discharge pipe 2 of the smelting furnace 1, the flue gas may contain some flammable and explosive gases, and the combustible gas is directly discharged with great potential safety hazard, after the flue gas enters the secondary combustion chamber 3, the laser 603 is started to carry out laser thermal ignition on the flue gas in the secondary combustion chamber 3, the combustion improver injection pipe 5 introduces the combustion improver into the secondary combustion chamber 3 to improve the secondary combustion efficiency, and the combustion improver is output to the secondary combustion chamber 3 through the through hole 501, for example, when the flue gas contains carbon monoxide, oxygen can be selected as the combustion improver; the arrangement mode of the combustion improver injection pipe 5 and the through hole 501 can be as shown in fig. 3, the secondary combustion chamber 3 is in a cylindrical shape, fig. 3 is a side sectional view, and the gas outlet direction of the through hole 501 is set to be a direction different from the radial direction of the circular section of the secondary combustion chamber 3, so that the combustion improver output through the hole 501 drives the gas flow in the secondary combustion chamber 3 to form a vortex, the gas flow is in the direction of an arrow in the figure, the smoke in the secondary combustion chamber 3 can be fully stirred, the secondary combustion of the smoke is more sufficient, and the combustion efficiency of the vortex gas flow is higher than that of other gas flow types;

meanwhile, a worker can start the servo motor 605 or automatically start the servo motor 605, the driving shaft 601 of the servo motor 605 rotates to drive the laser seat 602 and the laser 603 to rotate, the laser 603 during rotation can perform laser irradiation on a large range of smoke, and therefore the smoke in a larger range can be irradiated and ignited, and a plurality of lasers 603 can be preferably fixed on the laser seat 602, so that more laser beams can be emitted to irradiate more smoke; in some embodiments, the drive shaft 601 cannot rotate for a plurality of turns due to the existence of the power supply circuit of the laser 603, so that the servo motor 605 can adopt a step-and-turn method, such as a turn-and-reverse method after a turn-and-reverse method, and a turn-and-reverse method after a turn-and-reverse method, which are sequentially circulated to prevent the power supply circuit from being wound, so as to sweep and ignite the flue gas in the secondary combustion chamber 3; the power supply circuit of the laser 603 can be led out through the drive shaft 601, or led out of the secondary combustion chamber 3 from another position; in the utility model, the laser is adopted to ignite the flue gas, the laser has high thermal efficiency, can transmit the gas in the secondary combustion chamber 3, and ignite the gas irradiated and swept by the laser light path, so that the ignition efficiency can be greatly improved, and the insufficient ignition can be prevented; in the conventional electric ignition method, the igniter can only ignite the gas near the igniter, but cannot ignite the gas far away, so that insufficient ignition can be caused;

in some preferred embodiments, a defocusing lens, a beam expanding lens, etc. may be installed on the light exit window of the laser 603, so as to expand the irradiation range of the light beam emitted by the laser 603, and further improve the ignition efficiency of the laser 603;

the transparent cover 604 can be made of high-strength and high-melting-point glass and can be used for transmitting laser emitted by the laser 603, the laser 603 is positioned in the closed cavity of the transparent cover 604 and is isolated from the combustion area of the secondary combustion chamber 3, so that the laser 603 can be prevented from being burnt out by smoke combusted in the secondary combustion chamber 3 to a certain extent;

the exhaust gas after the secondary combustion is output from the exhaust pipe 7.

The closed cavity in the transparent cover 604 is vacuum, so that the heat insulation between the closed cavity and the combustion area can be further improved, and the heat in the combustion area is further prevented from being conducted into the closed cavity to damage the laser 603.

In another embodiment, the transparent cover 604 is filled with an inert gas, which has poor thermal conductivity, and can also improve the thermal insulation between the closed cavity and the combustion area to a certain extent, further prevent the heat in the combustion area from being conducted into the closed cavity to damage the laser 603, and also prevent the explosion possibility of the transparent cover 604 caused by the closed cavity in a vacuum environment without vacuum pumping. Preferably, the density of the inert gas in the transparent cover 604 is greater than 1.29Kg/m, and the higher the density, the poorer the gas fluidity, so as to further prevent the heat in the combustion area from being conducted to the laser 603. Preferably, in some experimental data, the density of the inert gas within transparent cover 604 is greater than 2.58Kg/m, which may allow laser 603 to be completely at an acceptable ambient temperature.

In some embodiments, the combustion improver introduced into the combustion improver injection pipe 5 is oxygen, which can be used as a combustion improver for the secondary combustion of most flue gases, and especially in the use example of flue gases containing carbon monoxide, oxygen can be used as a good combustion improver.

Specifically, as shown in fig. 1, the system further comprises an oxygen storage tank 502, and an exhaust valve of the oxygen storage tank 502 is connected to the oxidant injection pipe 5.

Preferably, as shown in fig. 1, the secondary combustion device further comprises a supercharging air pump 503, the supercharging air pump 503 is installed on a connecting pipeline between the oxygen storage tank 502 and the combustion improver injection pipe 5, the supercharging air pump 503 can increase the pressure and the speed of the combustion improver input from the oxygen storage tank 502 to the combustion improver injection pipe 5, the higher the output pressure of the combustion improver is, the higher the speed of the combustion improver exiting through the hole 501 is, so that the stronger the vortex flow caused in the secondary combustion chamber 3 is, the more sufficient the secondary combustion of the flue gas is.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (3)

1. A vortex-based degassing device, comprising: the device comprises a smelting furnace (1), wherein the smelting furnace (1) comprises a flue gas discharge pipe (2);

the secondary combustion chamber (3) is also included, the flue gas discharge pipe (2) is connected into the secondary combustion chamber (3), and the secondary combustion chamber (3) is in a barrel shape;

the combustion improver injection pipe (5) is internally communicated with a combustion improver, the combustion improver injection pipe (5) is provided with a through hole (501), the through hole (501) extends into the secondary combustion chamber (3), the through holes (501) are sequentially distributed along the axial direction of the cylindrical secondary combustion chamber (3), and the air outlet direction of the through hole (501) is not in the same direction with the radial direction of the secondary combustion chamber (3);

the ignition system comprises a servo motor (605), a laser (603) and a transparent cover (604), wherein a driving shaft (601) of the servo motor (605) extends into the secondary combustion chamber (3), the tail end of the driving shaft (601) is fixedly provided with a laser seat (602), the laser (603) is fixedly arranged on the laser seat (602), the transparent cover (604) is fixedly arranged on the inner wall of the secondary combustion chamber (3) and forms a closed cavity, and the tail end of the driving shaft (601), the laser seat (602) and the laser (603) are positioned in the closed cavity;

the secondary combustion chamber (3) is also provided with an exhaust pipe (7);

the combustion improver introduced into the combustion improver injection pipe (5) is oxygen;

the device also comprises an oxygen storage tank (502), wherein an exhaust valve of the oxygen storage tank (502) is connected with a combustion improver injection pipe (5);

the device also comprises a pressurization air pump (503), wherein the pressurization air pump (503) is installed on a connecting pipeline between the oxygen storage tank (502) and the combustion improver injection pipe (5).

2. A vortex based degassing device according to claim 1, wherein: the closed cavity in the transparent cover (604) is vacuum.

3. A vortex based degassing device according to claim 1, wherein: the transparent cover (604) is filled with inert gas.

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