CN211012500U

CN211012500U - Slag waste heat utilization system

Info

Publication number: CN211012500U
Application number: CN201921248511.XU
Authority: CN
Inventors: 蒋纯; 雷吟春; 李湘军; 曹育龙; 王琪; 龙长春; 曹成
Original assignee: Hunan Litian High Tech Materials Co ltd
Current assignee: Hunan Litian High Tech Materials Co ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-07-14
Anticipated expiration: 2029-08-02

Abstract

The utility model discloses a slag waste heat utilization system, which comprises a slag heat radiation furnace, a slag heat radiation device and an air draft system; the furnace slag heat radiation furnace is formed by surrounding a furnace side wall and a furnace top wall, openings are formed in two ends of the furnace slag heat radiation furnace, the upper surface of the furnace top wall is used for placing water-containing materials, the furnace top wall is made of a metal plate with good heat conductivity, and the air draft system is located above the furnace top wall and used for pumping away steam evaporated by the water-containing materials; the slag heat dissipation device comprises a slag paving flat plate and a conveying belt, wherein the conveying path of the conveying belt penetrates through a furnace chamber of the slag heat dissipation furnace, and the slag paving flat plate is arranged on the conveying belt. The slag that discharges the smelting furnace transports to the slag and lays on the flat board, and the slag is placed in getting into the slag heat dissipation stove along with the conveyer belt, and the heat heating furnace roof that the slag gived off, and then will lay the moisture material stoving on the furnace roof, and the steam that moisture material evaporated is taken away through exhaust system, prevents that steam from spreading to the workshop in.

Description

Slag waste heat utilization system

Technical Field

The utility model relates to a slag waste heat utilization technology field especially relates to a slag waste heat utilization system.

Background

In pyrometallurgy, the discharged slag afterheat has hundreds of degrees, the afterheat is not effectively utilized usually, and the energy waste is serious. The metallurgical raw materials of metals generally need to be sintered before smelting so as to improve the metallurgical performance of the raw materials. The sintering material usually contains much water, and the water content needs to be reduced by airing or drying before sintering. The operation of airing is simpler, and is with low costs, but inefficiency, the cycle length. If the drying is adopted, the efficiency is high, the period is short, but the energy consumption needs to be additionally increased, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a slag waste heat utilization system utilizes the waste heat of slag to come the moisture of stoving sintering raw materials, reduces the production energy consumption, improves production efficiency.

The utility model adopts the technical proposal that: a slag waste heat utilization system comprises a slag radiating furnace, a slag radiating device and an air draft system;

the furnace slag heat radiation furnace is formed by surrounding a furnace side wall and a furnace top wall, openings are formed in two ends of the furnace slag heat radiation furnace, the upper surface of the furnace top wall is used for placing water-containing materials, the furnace top wall is made of a metal plate with good heat conductivity, and the air draft system is located above the furnace top wall and used for pumping away steam evaporated by the water-containing materials;

the slag heat dissipation device comprises a slag paving flat plate and a conveying belt, wherein the conveying path of the conveying belt penetrates through a furnace chamber of the slag heat dissipation furnace, and the slag paving flat plate is arranged on the conveying belt.

Further preferably, a turning rake is arranged in a furnace chamber of the slag radiating furnace and comprises a rotating shaft and a plurality of wing plates arranged on the peripheral surface of the rotating shaft, the rotating shaft is transversely arranged above the slag laying flat plate, two ends of the rotating shaft are rotatably connected with the side wall of the furnace, and the wing plates rotate along with the rotating shaft to stir the slag to lay the slag on the flat plate.

Preferably, the number of the wing plates is four, the wing plates are uniformly arranged on the circumferential surface of the rotating shaft, each wing plate extends from one end of the rotating shaft to the other end of the rotating shaft, and the four wing plates are obliquely arranged clockwise or anticlockwise.

Further optimize, exhaust system includes gas collecting device and air exhauster, gas collecting device establishes the top at the roof, and the gas collection mouth is towards the moisture material on the roof, gas collecting device passes through siphunculus and air exhauster intercommunication.

Further optimize, still include exhaust treatment device, exhaust treatment device includes intake pipe, inclosed exhaust-gas treatment room and blast pipe, the air outlet intercommunication of intake pipe and air exhauster, the inside in exhaust treatment room is equipped with the reaction catalysis board, and separates the exhaust-gas treatment room for air inlet chamber and air discharge chamber, intake pipe and air inlet chamber intercommunication, blast pipe and air discharge chamber intercommunication.

Further optimize, be equipped with the natural gas combustor in the air inlet chamber, the flame spout of natural gas combustor is equipped with the valve of control gas volume in towards the air inlet chamber on the natural gas combustor.

Further optimization, the middle part of the furnace top wall is in an arch shape, water collecting grooves are formed in two sides of the furnace top wall, and water collecting devices are arranged at two ends of each water collecting groove.

Further optimizing, still include the waste residue recovery station, the waste residue recovery station is located the transport route of conveyer belt.

The utility model has the advantages that: the smelting furnace exhaust slag is transported to the slag and laid on the flat board, and the slag is placed in getting into the slag heat dissipation stove along with the conveyer belt, and the heat heating furnace roof that the slag gived off, and then will lay the moisture material stoving on the furnace roof, and the steam that moisture material evaporated is taken away through exhaust system, prevents that steam from spreading to the workshop in, has improved energy utilization and has rateed, has reduced the production energy consumption, has improved production efficiency.

Drawings

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

FIG. 1 is a schematic structural diagram of a slag waste heat utilization system according to an embodiment of the present invention;

FIG. 2 is a front sectional view of a slag heat-dissipating furnace according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an exhaust gas treatment device according to an embodiment of the present invention.

Detailed Description

The slag waste heat utilization system shown in fig. 1 and 2 includes a slag heat radiation furnace 100, a slag heat radiation device 200 and an air draft system;

the slag heat-radiating furnace 100 is formed by enclosing a furnace side wall 110 and a furnace top wall 120, openings are formed in two ends of the furnace side wall 110 and the furnace top wall 120, the upper surface of the furnace top wall 120 is used for placing water-containing materials 300, the furnace top wall 120 is made of a metal plate with good heat conductivity, and an air draft system is located above the furnace top wall 120 and used for pumping away water vapor evaporated by the water-containing materials 300;

the slag radiator 200 includes a slag-laying plate 210 and a conveyor belt 220, a conveying path of the conveyor belt 220 passes through a furnace chamber of the slag radiator 100, and the slag-laying plate 210 is disposed on the conveyor belt 220.

The slag 500 discharged from the smelting furnace is transferred to the slag laying plate 210 and the slag 500 is spread on the slag laying plate 210 for greater heat dissipation. Slag 500 places in getting into slag heat dissipation stove 100 along with conveyer belt 200, and heat heating furnace roof 120 that slag 500 gived off, and then will lay the moisture material 300 drying on furnace roof 120, and the steam that moisture material 300 evaporated is taken away through exhaust system, prevents that steam from flooding into the workshop, and furnace roof 120 selects the better metal sheet of thermal conductivity to make, is favorable to thermal transmission.

The furnace chamber of the slag heat-radiating furnace 100 is provided with a stirring rake 400, the stirring rake 400 comprises a rotating shaft 410 and a plurality of wing plates 420 arranged on the circumferential surface of the rotating shaft 410, the rotating shaft 410 is transversely arranged above the slag laying flat plate 210, two ends of the rotating shaft 410 are rotatably connected with the furnace side wall 110, and the wing plates 420 stir the slag 500 on the slag laying flat plate 210 along with the rotation of the rotating shaft 410.

Because the slag 500 has a certain thickness, after a period of heat dissipation, the heat of the slag on the surface layer is almost dissipated, but the slag on the inner layer has more heat.

At this time, the turning rake 400 is started, and the wing plate 420 turns along with the rotation of the rotating shaft 410 to turn the slag 500 on the slag laying plate 210, so that the lower layer of slag 500 is turned to the surface layer, and the heat dissipation of the slag is accelerated.

Further, the number of the wings 420 is four, and the wings are uniformly arranged on the circumferential surface of the rotating shaft 410, each wing 420 extends from one end of the rotating shaft 410 to the other end, and the four wings 420 are obliquely arranged in a clockwise or counterclockwise direction.

The exhaust system comprises a gas collecting device 610 and an exhaust fan 620, the gas collecting device 610 is arranged above the furnace top wall 120, a gas collecting opening faces the water-containing material 300 on the furnace top wall 120, and the gas collecting device 610 is communicated with the exhaust fan 620 through a through pipe.

The steam that aqueous material 300 evaporated is collected by gas collection device 610 after rising, outside being taken out the workshop under the effect of air exhauster, avoids steam to diffuse in whole workshop, worsens the environment of workshop, and gas collection device 610 selects the gas collection fill of a plurality of back tapers, and the opening of gas collection fill is down, and the gas collection fill is arranged according to the surface of roof wall 120, guarantees as far as possible that even arranging is so that take away steam at roof wall 120.

As shown in fig. 3, the waste gas treatment device 700 is further included, the waste gas treatment device 700 includes an air inlet pipe 710, a closed waste gas treatment room 720 and an air outlet pipe 730, the air inlet pipe 710 is communicated with an air outlet of the exhaust fan 620, a reaction catalytic plate 740 is arranged inside the waste gas treatment room 720 and divides the waste gas treatment room 720 into an air inlet chamber 721 and an air outlet chamber 722, the air inlet pipe 710 is communicated with the air inlet chamber 721, and the air outlet pipe 730 is communicated with the air outlet chamber 722.

Because the sintering raw materials generally contain substances such as sulfide minerals, nitride minerals and the like, in the drying process, part of sulfur oxides and nitrogen oxides can be heated and decomposed and rise along with water vapor, and if the sulfur oxides and the nitrogen oxides are not treated, the sulfur oxides and the nitrogen oxides are directly pumped away and discharged into the atmosphere, so that the atmosphere pollution is easily caused. The exhaust fan 620 sends the extracted water vapor into the exhaust gas treatment device 700, and harmful gases such as sulfuration gas and nitriding gas are converted into harmless nitrogen or condensate after passing through the reaction catalytic plate 740 from the gas inlet chamber 721, so that the harmful gases are removed and then exhausted to the atmosphere from the exhaust chamber 722.

The natural gas combustor 800 is arranged in the air inlet chamber 721, a flame nozzle 810 of the natural gas combustor 800 faces the air inlet chamber 721, and a valve for controlling gas quantity is arranged on the natural gas combustor 800.

The moisture drawn by the suction fan generally has a certain temperature, but if the temperature is insufficient, the reaction is insufficient when passing through the reaction catalyst plate 740. The gas in the gas inlet chamber 721 may be heated by starting the natural gas burner 800 at this time to increase the reactivity of the gas with the reaction catalyst plate 740, so that the reaction may be more complete.

The middle part of the furnace top wall 120 is arch-shaped, water collecting grooves 130 are arranged on two sides, and water collecting devices are arranged at two ends of the water collecting grooves 130. By designing the middle of the furnace top wall 120 in an arch shape, the hydrous material 300 laid on the furnace top wall 120 can flow into the water collecting tank 130 from both sides and finally into the water collecting means if the moisture content is relatively high. Thereby accelerating the water removal efficiency of the water-containing material 300.

A waste residue recovery station 900 is also included, the waste residue recovery station 900 being located on the transport path of the conveyor belt 220. The waste residue with poor heat loss is finally conveyed to the waste residue recovery station 900 along with the conveyor belt 220 for treatment.

Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims

1. A slag waste heat utilization system is characterized in that: comprises a slag radiating furnace (100), a slag radiating device (200) and an air draft system;

the furnace slag heat dissipation furnace (100) is formed by enclosing a furnace side wall (110) and a furnace top wall (120), openings are formed in two ends of the furnace side wall and the furnace top wall, the upper surface of the furnace top wall (120) is used for placing water-containing materials (300), the furnace top wall (120) is made of a metal plate with good heat conductivity, and the air draft system is located above the furnace top wall (120) and used for pumping away water vapor evaporated by the water-containing materials (300);

the slag heat dissipation device (200) comprises a slag laying flat plate (210) and a conveyor belt (220), wherein the conveyor belt (220) is conveyed through a furnace chamber of the slag heat dissipation furnace (100), and the slag laying flat plate (210) is arranged on the conveyor belt (220).

2. The slag waste heat utilization system according to claim 1, characterized in that: the furnace chamber of the slag radiating furnace (100) is internally provided with a turning rake (400), the turning rake (400) comprises a rotating shaft (410) and a plurality of wing plates (420) arranged on the circumferential surface of the rotating shaft (410), the rotating shaft (410) is transversely arranged above the slag laying flat plate (210), two ends of the rotating shaft (410) are rotatably connected with the furnace side wall (110), and the wing plates (420) rotate along with the rotating shaft (410) to stir the slag (500) on the slag laying flat plate (210).

3. The slag waste heat utilization system according to claim 2, characterized in that: the number of the wing plates (420) is four, the wing plates are uniformly arranged on the circumferential surface of the rotating shaft (410), each wing plate (420) extends from one end of the rotating shaft (410) to the other end, and the four wing plates (420) are obliquely arranged along the clockwise direction or the anticlockwise direction.

4. The slag waste heat utilization system according to any one of claims 1 to 3, characterized in that: the exhaust system comprises a gas collecting device (610) and an exhaust fan (620), wherein the gas collecting device (610) is arranged above the furnace top wall (120), a gas collecting opening faces to the water-containing material (300) on the furnace top wall (120), and the gas collecting device (610) is communicated with the exhaust fan (620) through a through pipe.

5. The slag waste heat utilization system according to claim 4, characterized in that: still include exhaust-gas treatment device (700), exhaust-gas treatment device (700) include intake pipe (710), inclosed exhaust-gas treatment room (720) and blast pipe (730), intake pipe (710) and the air outlet intercommunication of air exhauster (620), the inside in exhaust-gas treatment room (720) is equipped with reaction catalysis board (740), and separates exhaust-gas treatment room (720) for air inlet chamber (721) and exhaust chamber (722), intake pipe (710) and air inlet chamber (721) intercommunication, blast pipe (730) and exhaust chamber (722) intercommunication.

6. The slag waste heat utilization system according to claim 5, characterized in that: the natural gas burner (800) is arranged in the air inlet chamber (721), a flame nozzle (810) of the natural gas burner (800) faces the air inlet chamber (721), and a valve for controlling gas quantity is arranged on the natural gas burner (800).

7. The slag waste heat utilization system according to any one of claims 1 to 3, characterized in that: the middle part of the furnace top wall (120) is in an arch shape, water collecting grooves (130) are arranged on two sides of the furnace top wall, and water collecting devices are arranged at two ends of each water collecting groove (130).

8. The slag waste heat utilization system according to any one of claims 1 to 3, characterized in that: the waste residue recycling device is characterized by further comprising a waste residue recycling station (900), wherein the waste residue recycling station (900) is located on the conveying path of the conveying belt (220).