CN111457746B

CN111457746B - Smoke waste heat recovery device for steelmaking electric furnace

Info

Publication number: CN111457746B
Application number: CN202010377408.6A
Authority: CN
Inventors: 陆建宁; 朱华萍; 郑璇; 王圣冬; 彭友谊
Original assignee: Nanjing Huadian Energy Saving And Environmental Protection Co ltd
Current assignee: Nanjing Huadian Energy Saving And Environmental Protection Co ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2022-02-18
Anticipated expiration: 2040-05-07
Also published as: CN111457746A

Abstract

The invention discloses a smoke waste heat recovery device for a steelmaking electric furnace, and relates to the technical field of steelmaking. The invention comprises a drainage device and a heat recovery box, wherein the drainage device is connected with the heat recovery box through a pipeline, the drainage device comprises a smoke guiding cover and a filter box, the smoke guiding cover is communicated with the filter box, a plurality of fans are arranged on one surface of the smoke guiding cover, and a filter element is arranged in the filter box. According to the invention, the smoke guide cover is arranged to improve the throughput of the waste gas containing smoke dust, the fan is arranged in the smoke guide cover to improve the air circulation rate, the filter box is arranged to filter smoke dust particles in the waste gas, and the waste gas is guided into the heat recovery box to recover the waste heat in the waste gas, so that the energy loss of the industry is reduced, the loss is reduced, and meanwhile, the subsequent treatment of the waste gas is facilitated.

Description

Smoke waste heat recovery device for steelmaking electric furnace

Technical Field

The invention belongs to the technical field of steel making, and particularly relates to a smoke waste heat recovery device for a steel making electric furnace.

Background

Electric furnace steelmaking is a steelmaking process using electricity as an energy source, and common electric furnaces include an electric arc furnace, an induction furnace, an electroslag furnace, an electron beam furnace, a consumable electric arc furnace and the like.

In the process of electric furnace steelmaking, the commonly used raw materials are steelmaking pig iron and scrap steel, impurities in the steelmaking pig iron and the scrap steel are discharged out of molten steel along with rising air along with the rise of temperature in the steelmaking process, the impurities comprise aluminum oxide, manganese dioxide, titanium oxide, silicon oxide, calcium oxide, magnesium oxide, calcium fluoride and the like, the impurities are easy to condense and adhere to the inner surface of a pipeline after being cooled, the service life of the pipeline is shortened, and troubles are brought to the recovery of waste heat of steelmaking.

Disclosure of Invention

The invention aims to provide a smoke waste heat recovery device for a steelmaking electric furnace, which solves the problem that the service life of a pipeline is short due to the influence of smoke dust on the existing steelmaking waste heat.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a smoke waste heat recovery device for a steelmaking electric furnace, which comprises a drainage device and a heat recovery box, wherein the drainage device is connected with the heat recovery box through a guide pipe;

the drainage device is arranged right above the steelmaking electric furnace and used for improving the introduction amount of smoke-containing waste gas, the drainage device comprises a smoke guide hood, a drainage pipe, a filter box and a driving motor, the smoke guide hood is connected with the filter box through the drainage pipe, and the driving motor is matched with the smoke guide hood;

wherein, the induced fume cover is the horn structure, increases the entering amount of waste gas, improves waste heat recovery efficiency, an induced fume cover surface is provided with a plurality of fixed orificess, install the clamping ring in the fixed orificess, through connection area group link between a plurality of clamping rings, install the drainage fan in the clamping ring, the drainage fan is organized through the connection area and is cooperated with driving motor, and driving motor passes through connection area group control drainage fan work, through the cooperation of connection area group with the drainage fan, reduces the demand to driving motor quantity to reduce the condition of working under the environment of the waste gas that contains a large amount of smoke and dust simultaneously of many driving motor, reduce the loss.

Preferably, the heat recovery box is of a box structure, two opposite surfaces of the heat recovery box are respectively provided with a plurality of air inlets and a plurality of air outlets, one surface of the heat recovery box is provided with a water inlet, the water inlet is connected with a water pipe to introduce tap water, the other surface of the heat recovery box is provided with a water outlet, the water outlet is connected with the water pipe to evacuate the heated tap water, the peripheral side of the heat recovery box is provided with a temperature detector, the temperature detector is used for monitoring the water temperature in the heat recovery box in real time to control the inflow and outflow of the tap water, the heat recovery box is internally provided with a plurality of heating pipes, the arrangement of the plurality of heating pipes improves the waste heat recovery efficiency, the heating pipes, the air inlets and the air outlets are adaptive in quantity, two ends of the heating pipes are respectively fixed in the air inlets and the air outlets, the plurality of heating pipes are communicated with each other through furling pipes, and waste gas enters each heating pipe through furling pipes, and then the heating pipes enter the furling pipes to be gathered, a plurality of supports are arranged on the inner surface of the heat recovery box, and the supports are connected and matched with the heating pipes, so that the stability of the heating pipes in the heat recovery box is improved.

Preferably, the drainage fan includes fixing base, retainer plate and fan, the fixing base is the loop configuration, fixing base week side is provided with the installing port, install the drive shaft in the installing port, the drive shaft cooperatees with the connecting band group, the retainer plate is installed in the fixing base, two relative surfaces of retainer plate all are provided with a plurality of limiting plates, the limiting plate is connected fixedly with the fixing base, the fan is installed in the retainer plate, retainer plate and drive shaft meshing, connecting band group drive the retainer plate motion through the drive shaft, and then drive the fan motion, improve the air flow rate, promote heat recovery efficiency.

Preferably, a plurality of line holes are formed in the peripheral side face of the smoke guide cover, each connecting band group comprises a plurality of connecting bands, and the connecting bands penetrate through the line holes.

Preferably, the wind direction of the drainage fan is from the outside of the smoke guide cover to the inside of the smoke guide cover.

Preferably, a connecting groove is formed in one surface of the filter box, two limiting rings are arranged on the inner surface of the filter box, the connecting groove is arranged between the two limiting rings, and a filter element is installed in the connecting groove

Wherein, the filter core includes mount, closing plate, filter screen and filter core body, the mount is frame structure, the shape and the filter box of mount suit, the relative two surfaces of mount all are provided with the filter screen, the mount forms the box body structure with the filter screen is mutually supported, the filter core body sets up in the box body structure, a mount surface and closing plate connection, the closing plate cooperatees with the spread groove, and the filter core body is active carbon for adsorb the smoke and dust granule that contains in the smoke and dust waste gas, prevent that the smoke and dust granule from collecing in the heating tube, and then blockking up the heating pipe.

Preferably, the heating pipes are of a coiled pipe structure, so that the time of radiating heat in the waste gas into tap water is prolonged, the plurality of heating pipes are parallel to each other, the heating pipes are prevented from being connected, the aging rate of the heating pipes is increased, and the support and the heating pipes are clamped and matched to increase the stability of the heating pipes.

Preferably, the water inlet and the water outlet are both provided with electromagnetic valves, so that the inflow and outflow of tap water can be conveniently controlled.

Preferably, a suction pump is further arranged between the drainage device and the heat recovery tank, so that the circulation speed of the waste gas is further increased.

The invention has the following beneficial effects:

according to the invention, the smoke guide cover is arranged to improve the throughput of the waste gas containing smoke dust, the fan is arranged in the smoke guide cover to improve the air circulation rate, the filter box is arranged to filter smoke dust particles in the waste gas, and the waste gas is guided into the heat recovery box to recover the waste heat in the waste gas, so that the energy loss of the industry is reduced, the loss is reduced, and meanwhile, the subsequent treatment of the waste gas is facilitated.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a drainage device of a smoke waste heat recovery device for a steelmaking electric furnace according to the present invention;

FIG. 2 is a schematic view of an assembly structure of a filter element-free drainage device of a smoke waste heat recovery device for a steelmaking electric furnace according to the present invention;

FIG. 3 is a front view of an assembly structure of a filter element-free flow guide device of a smoke waste heat recovery device for a steelmaking electric furnace according to the present invention;

FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 3;

FIG. 5 is a schematic view of the cross-sectional structure B-B in FIG. 3;

FIG. 6 is a schematic structural view of a flow guiding fan of the smoke waste heat recovery device for a steelmaking electric furnace according to the present invention;

FIG. 7 is a schematic structural view of a heat recovery box of the smoke waste heat recovery device for the steelmaking electric furnace according to the present invention;

FIG. 8 is a side view of a heat recovery tank of a smoke waste heat recovery apparatus for a steelmaking electric furnace according to the present invention;

FIG. 9 is a schematic view of the cross-sectional structure C-C of FIG. 8;

FIG. 10 is a front view of a heat recovery tank of a smoke waste heat recovery apparatus for a steelmaking electric furnace according to the present invention;

fig. 11 is a schematic view of the cross-sectional structure D-D in fig. 10.

In the drawings, the components represented by the respective reference numerals are listed below:

1-a smoke guiding hood, 2-a drainage pipe, 3-a filter box, 4-a driving motor, 5-a heat recovery box, 101-a connecting ring, 102-a connecting belt group, 103-a drainage fan, 1031-a fixed seat, 1032-a fixed ring, 1033-a limiting plate, 1034-a fan, 1035-a driving shaft, 301-a connecting groove, 302-a limiting ring, 303-a filter element, 501-a water inlet, 502-a water outlet, 503-a heating pipe, 504-a collecting pipe, 505-a temperature detector and 506-a support.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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 invention.

In the description of the present invention, it is to be understood that the terms "upper", "middle", "outer", "inner", and the like, indicate orientations or positional relationships, are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 11, the present invention relates to a smoke waste heat recovery device for a steelmaking electric furnace, which includes a flow guiding device and a heat recovery box 5, wherein the flow guiding device is connected with the heat recovery box 5 through a conduit, the flow guiding device filters the waste containing smoke generated by the steelmaking electric furnace and then conveys the waste to the heat recovery box 5, and the heat recovery box 5 recovers and utilizes the heat in the waste gas.

As shown in fig. 1-2, the drainage device is arranged right above the steelmaking electric furnace to improve the introduction amount of the smoke-containing waste gas, the drainage device comprises a smoke-guiding cover 1, a drainage pipe 2, a filter box 3 and a driving motor 4, the smoke-guiding cover 1 is connected with the filter box 3 through the drainage pipe 2, and the driving motor 4 is matched with the smoke-guiding cover 1.

As shown in fig. 3-4, induced smoke cover 1 is the horn structure, increase the entering amount of waste gas, improve waste heat recovery efficiency, induced smoke cover 1 surface is provided with a plurality of fixed orificess, install clamping ring 101 in the fixed orificess, connect through connection area group 102 between a plurality of clamping ring 101, install drainage fan 103 in the clamping ring 101, drainage fan 103 cooperatees with driving motor 4 through connection area group 102, driving motor 4 controls drainage fan 103 work through connection area group 102, through the cooperation of connection area group 102 with drainage fan 103, reduce the demand to driving motor 4 quantity, thereby reduce the condition of many driving motor 4 working under the environment of the waste gas that contains a large amount of smoke and dust simultaneously, and the loss is reduced.

As shown in fig. 6, the drainage fan 103 includes a fixing seat 1031, a fixing ring 1032 and a fan 1034, the fixing seat 1031 is a ring structure, a mounting opening is formed on the peripheral side of the fixing seat 1031, a driving shaft 1035 is mounted in the mounting opening, the driving shaft 1035 is matched with the connecting band set 102, the fixing ring 1032 is mounted in the fixing seat 1031, two opposite surfaces of the fixing ring 1032 are respectively provided with a plurality of limiting plates 1033, the limiting plates 1033 are fixedly connected with the fixing seat 1031, the fan 1034 is mounted in the fixing ring 1032, the fixing ring 1032 is engaged with the driving shaft 1035, the connecting band set 102 drives the fixing ring 1032 to move through the driving shaft 1035, and then the fan 1034 is driven to move, the air flow rate is increased, and the heat recovery efficiency is increased.

As shown in fig. 7-11, the heat recovery tank 5 is a box structure, two opposite surfaces of the heat recovery tank 5 are respectively provided with a plurality of air inlets and a plurality of air outlets, one surface of the heat recovery tank 5 is provided with a water inlet 501, the water inlet 501 is connected with a water pipe to introduce tap water, the other surface of the heat recovery tank 5 is provided with a water outlet 502, the water outlet 502 is connected with the water pipe to evacuate the heated tap water, the peripheral surface of the heat recovery tank 5 is provided with a temperature detector 505, the temperature detector 505 is used for monitoring the temperature of the water in the heat recovery tank 5 in real time, so as to control the inflow and outflow of the tap water, the heat recovery tank 5 is internally provided with a plurality of heating pipes 503, the arrangement of the plurality of heating pipes 503 improves the waste heat recovery efficiency, the number of the heating pipes 503, the air inlets and the air outlets are adaptive, two ends of the heating pipes 503 are respectively fixed in the air inlets and the air outlets, the plurality of heating pipes 503 are communicated through furled pipes 504, the waste gas enters the heating pipes 503 through the furling pipes 504, and then enters the furling pipes 504 from the heating pipes 503 to be gathered, the inner surface of the heat recovery box 5 is provided with a plurality of brackets 506, and the brackets 506 are connected and matched with the heating pipes 503, so that the stability of the heating pipes 503 in the heat recovery box 5 is improved.

Further, a plurality of line holes are formed in the peripheral side face of the smoke guide cover 1, the connecting band group 102 comprises a plurality of connecting bands, and the connecting bands penetrate through the line holes.

Further, the air direction of the air guide fan 103 is from the outside of the fume guide cover 1 to the inside of the fume guide cover 1.

Furthermore, a connecting groove 301 is formed in one surface of the filter box 3, two limiting rings 302 are arranged on the inner surface of the filter box 3, the connecting groove 301 is arranged between the two limiting rings 302, and a filter element 303 is installed in the connecting groove 301

Wherein, filter core 303 includes the mount, the closing plate, filter screen and filter core body, the mount is frame structure, the shape and the rose box 3 of mount suit, the two relative surfaces of mount all are provided with the filter screen, the mount forms the box body structure with the filter screen is mutually supported, the filter core body sets up in the box body structure, a mount surface and closing plate connection, the closing plate cooperatees with spread groove 301, the filter core body is the active carbon, a smoke and dust granule for adsorbing in containing smoke and dust waste gas, prevent that smoke and dust granule from gathering in heating pipe 503, and then block up heating pipe 503.

Further, the heating pipes 503 are of a serpentine pipe structure, so that the time for radiating heat in the exhaust gas into tap water is prolonged, the plurality of heating pipes 503 are parallel to each other, the connection between the heating pipes 503 is prevented, the aging rate of the heating pipes 503 is increased, and the support 506 and the heating pipes 503 are clamped and matched to increase the stability of the heating pipes 503.

Further, the water inlet 501 and the water outlet 502 are provided with electromagnetic valves, so that the inflow and outflow of tap water can be conveniently controlled.

Furthermore, a suction pump is arranged between the drainage device and the heat recovery tank 5, so that the circulation speed of the waste gas is further improved.

Example two:

referring to fig. 1 to 11, the present invention is a smoke waste heat recovery device for a steel making electric furnace, wherein the power of a driving motor 4 is adapted to the number of fans 1034, the rated power of the driving motor 4 is 1K-5KW, the model of a temperature detector 505 is WF-KL001, the measured temperature range is-50-200 ℃, and the working principle is as follows: the setting passes through driving motor 4 drive fan 1034 at the drainage device of steelmaking electric stove top, increase the air flow in the drainage device, contain a large amount of smoke and dust granule in the smoke and dust cover 1 is inhaled to the steelmaking in-process, get into rose box 3 through drainage tube 2, waste gas gets into behind the rose box 3 by prefilter, the smoke and dust granule is adsorbed by filter core 303, the waste gas that contains a large amount of heats continues to pass through in the pipeline gets into heat recovery case 5, waste gas is when passing through heating pipe 503, carry out the heat exchange with the running water in the heat recovery case 5, reach the effect of retrieving the waste heat.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a smoke and dust waste heat recovery device for steelmaking electric stove, includes drainage device and heat recovery case (5), its characterized in that: the drainage device is connected with the heat recovery box (5) through a conduit;

the drainage device is arranged right above the steelmaking electric furnace and comprises a smoke guiding cover (1), a drainage pipe (2), a filter box (3) and a driving motor (4), wherein the smoke guiding cover (1) is connected with the filter box (3) through the drainage pipe (2), and the driving motor (4) is matched with the smoke guiding cover (1);

the exhaust hood is characterized in that the exhaust hood (1) is of a horn structure, a plurality of fixing holes are formed in one surface of the exhaust hood (1), connecting rings (101) are installed in the fixing holes, the connecting rings (101) are connected through connecting belt groups (102), an exhaust fan (103) is installed in the connecting rings (101), and the exhaust fan (103) is matched with the driving motor (4) through the connecting belt groups (102);

the drainage fan (103) comprises a fixed seat (1031), a fixed ring (1032) and a fan (1034), wherein the fixed seat (1031) is of a ring structure, a mounting opening is formed in the peripheral side face of the fixed seat (1031), a driving shaft (1035) is mounted in the mounting opening, the driving shaft (1035) is matched with the connecting belt group (102), the fixed ring (1032) is mounted in the fixed seat (1031), a plurality of limiting plates (1033) are arranged on two opposite surfaces of the fixed ring (1032), the limiting plates (1033) are fixedly connected with the fixed seat (1031), the fan (1034) is mounted in the fixed ring (1032), and the fixed ring (1032) is meshed with the driving shaft (1035);

a connecting groove (301) is formed in one surface of the filter box (3), two limiting rings (302) are arranged on the inner surface of the filter box (3), the connecting groove (301) is arranged between the two limiting rings (302), and a filter element (303) is installed in the connecting groove (301);

the filter element (303) comprises a fixed frame, a sealing plate, a filter screen and a filter element body, wherein the fixed frame is of a frame structure, the shape of the fixed frame is matched with that of the filter box (3), the filter screen is arranged on two opposite surfaces of the fixed frame, the fixed frame and the filter screen are matched with each other to form a box body structure, the filter element body is arranged in the box body structure, one surface of the fixed frame is connected with the sealing plate, and the sealing plate is matched with the connecting groove (301);

heat recovery case (5) are the box structure, heat recovery case (5) double-phase surface is provided with a plurality of air inlets and a plurality of gas outlet respectively, a surface of heat recovery case (5) is provided with water inlet (501), another surface of heat recovery case (5) is provided with delivery port (502), side is provided with temperature detector (505) all around heat recovery case (5), be provided with a plurality of heating pipes (503) in heat recovery case (5), heating pipe (503), air inlet and gas outlet are quantity homogeneous phase adaptation, heating pipe (503) both ends are fixed respectively in air inlet, gas outlet, through drawing in pipe (504) intercommunication between a plurality of heating pipes (503), heat recovery case (5) internal surface is provided with a plurality of supports (506), support (506) are connected the cooperation with heating pipe (503).

2. The smoke waste heat recovery device for the steelmaking electric furnace as claimed in claim 1, wherein said fume guiding hood (1) is provided with a plurality of wire holes on its peripheral side, and said connecting band set (102) comprises a plurality of connecting bands, said connecting bands passing through said wire holes.

3. The smoke waste heat recovery device for the steelmaking electric furnace as claimed in claim 2, wherein the wind direction of said draft fan (103) is from outside the fume guide hood (1) to inside the fume guide hood (1).

4. The smoke waste heat recovery device for the steelmaking electric furnace as claimed in claim 3, wherein said heating pipes (503) are of a serpentine pipe structure, a plurality of said heating pipes (503) are parallel to each other, and said bracket (506) is in clamping fit with the heating pipes (503).

5. The smoke dust waste heat recovery device for the steelmaking electric furnace as claimed in claim 4, wherein the water inlet (501) and the water outlet (502) are provided with electromagnetic valves.

6. The smoke dust waste heat recovery device for the steelmaking electric furnace as claimed in claim 5, characterized in that a suction pump is further provided between the flow guide device and the heat recovery tank (5).