CN111041135A - Slag waste heat recovery removes bed device - Google Patents
Slag waste heat recovery removes bed device Download PDFInfo
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- CN111041135A CN111041135A CN201911228631.8A CN201911228631A CN111041135A CN 111041135 A CN111041135 A CN 111041135A CN 201911228631 A CN201911228631 A CN 201911228631A CN 111041135 A CN111041135 A CN 111041135A
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- slag
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- air distribution
- heat exchange
- distribution pipe
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/052—Apparatus features including rotating parts
- C21B2400/058—Rotating beds on which slag is cooled
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The invention discloses a slag waste heat recovery moving bed device which comprises a heat exchange bin, wherein the heat exchange bin is arranged below a granulating bin, the center of the heat exchange bin is provided with an installation space of a granulating device, and a granulating rotating cup is arranged on the installation space; slag cotton scrapers are arranged on two sides of the granulating rotating cup and are arranged at the joint of the residual granulating rotating cup of the heat exchange bin; a material flattening device is arranged below the slag cotton scraper, a roller crushing device is arranged below the material flattening device, and an air distribution mechanism is arranged below the roller crushing device; according to the invention, the slag wool scraper reciprocates on the side surface of the granulation rotating cup, so that the cutting of the slag wool around the granulation rotating cup is realized, and the agglomeration of the slag wool around the granulation rotating cup is avoided; the material leveling device is arranged to realize the carding of the surface of the material layer, so that the material layer is homogenized; crushing large-particle-size slag blocks or slag cotton clusters through a roller damage device; by arranging the air distribution mechanism, the loosening of the particle layer is ensured, the slag particles are prevented from being thermally bonded, and the smooth discharging is ensured.
Description
Technical Field
The invention relates to the technical field of blast furnace slag waste heat recovery, in particular to a slag waste heat recovery moving bed device.
Background
At present, China is the largest steel producing country in the world, and the steel yield has remained the first in the world for 17 years. In 2014, the yield of pig iron in China reaches 7.11 hundred million tons, which accounts for about 60 percent of the total production of iron and steel in the world. During the steel smelting process, a large amount of high-temperature slag is generated. The blast furnace slag temperature can reach 1400-1550 ℃, and the sensible heat value of each ton of high-temperature blast furnace slag can reach 1260-1880 MJ/ton through calculation, which is equivalent to 60kg of standard coal/ton. According to statistics, based on the existing steel smelting technology in China, 0.3 ton of blast furnace slag is generated when 1 ton of pig iron is produced, calculated according to 7.11 million tons of pig iron output in China at present, more than 2.13 million tons of blast furnace slag can be generated in a foldable manner, and the sensible heat of the blast furnace slag is equivalent to 1278 million tons of standard coal.
At present, the common treatment method for high-temperature blast furnace slag in steel mills in China is a water quenching granulation method, and the high-temperature blast furnace slag is subjected to water quenching granulation and then is used as a cement production raw material. Although the water quenching granulation method realizes the large-scale utilization of the blast furnace slag, a large amount of water resources are consumed in the treatment process, and 1 ton of high-temperature molten slag is estimated to be treated, about 1 ton of new water is consumed, and about 10 tons of recycled water is consumed. In addition, a large amount of H is released in the water quenching process2S and SO2Gas, corrosion to buildings, damage to equipment and deterioration of working environment, and simultaneously generate a large amount of water vapor, which causes great waste of high-value sensible heat contained in blast furnace slag.
The dry treatment technology of the high-temperature blast furnace slag utilizes the indirect or direct contact of the high-temperature blast furnace slag and a heat transfer medium to carry out slag granulation and sensible heat recovery, does not consume precious water resources in the treatment process, and hardly releases H2S and SO2And the like. With the full promotion of energy conservation and emission reduction work of the steel industry in China, the high-temperature blast furnace slag dry-method centrifugal granulation technology is highly concerned in the industry. Centrifugal granulation in a Dry ProcessIn the treatment process, the high-temperature and high-viscosity slag is thrown away from the surface interface of the rotating disc by the rotating disc rotating at a high speed to form liquid drops in the air, the tiny liquid drops and a heat transfer medium in the space, generally air, carry out strong direct heat exchange to reduce the temperature of the liquid drops, enable the surface of the liquid drops to generate phase change to form a solidified layer, and the liquid drops are gradually changed into solid small particles along with the further reduction of the temperature. Because the rotating speed of the rotating disc is very high in the granulation process, generally can be up to 1000-. To further reduce the temperature of the particles, the heat transfer of the particles within the moving bed needs to be enhanced. At this time, the cooling time, cooling air volume and discharging speed of the high-temperature particles (high-temperature solid bulk material) in the moving bed become the key control factors of the steel slag waste heat recycling technology. In the existing waste heat recovery moving bed, a large amount of slag wool is often wound around a granulation rotating cup, and slag grains are thermally back bonded in a heat exchange bin, so that the technical problems of uneven blanking of the moving bed and low heat exchange efficiency are caused.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a slag waste heat recovery moving bed device, which aims to solve the technical problems that in the prior art, a large amount of slag wool is often wound around a granulation rotating cup, slag grains are thermally back bonded in a heat exchange bin, so that the moving bed is uneven in blanking and low in heat exchange efficiency.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a slag waste heat recovery moving bed device which comprises a heat exchange bin, a slag cotton scraper, a flattening device, a roller crushing device and an air distribution mechanism, wherein the heat exchange bin is arranged on the upper portion of the heat exchange bin;
the heat exchange bin is arranged below the granulating bin, the center of the heat exchange bin is provided with an installation space of the granulating device, and the granulating rotating cup is installed in the installation space; slag cotton scrapers are arranged on two sides of the granulating rotating cup and are arranged at the joint of the residual granulating rotating cup of the heat exchange bin; the lower part of the slag wool scraper is provided with a material flattening device, the lower part of the material flattening device is provided with a roller crushing device, and the lower part of the roller crushing device is provided with an air distribution mechanism.
Furthermore, the slag wool scrapers are symmetrically arranged on two sides of the granulation rotating cup along the radial direction, and the slag wool scrapers are of a zigzag structure.
Further, the air distribution mechanism comprises a first-stage air distribution pipe and a second-stage air distribution pipe, the first-stage air distribution pipe is arranged at the bottom of the heat exchange bin, and the second-stage air distribution pipe is arranged above the first-stage air distribution pipe; both ends of the first-stage air distribution pipe and the second-stage air distribution pipe are flexibly connected with the side wall of the heat exchange bin and are connected with the vibration motor.
Furthermore, a plurality of first air supply air caps are uniformly arranged on the first-stage air distribution pipe, and the distance between every two adjacent first air supply air caps is more than 2 times of the diameter of the first-stage air distribution pipe.
Furthermore, a plurality of inverted U-shaped structures are uniformly arranged on the second-stage air distribution pipe at intervals, openings of the inverted U-shaped structures are downward, and the arc sections extend upward.
Furthermore, a second air supply hood is arranged above the arc section of the inverted U-shaped structure.
Further, an air outlet is arranged below the arc section of the inverted U-shaped structure.
Furthermore, a plurality of vertical air pipes are uniformly arranged on the second-stage air distribution pipe at intervals, and air caps are arranged at the upper ends of the vertical air pipes.
Furthermore, the material leveling device adopts air-cooled rakes which are symmetrically arranged at two sides of the granulation rotating cup, and the air-cooled rakes are uniformly provided with air exhaust devices.
Further, the roller crushing devices are symmetrically arranged on two sides of the granulating rotating cup, the roller crushing devices are provided with a plurality of air-cooled roller crushing devices in pairs, the air-cooled roller crushing devices are connected with two ends of the heat exchange bin, and the rotating directions of each pair of air-cooled roller crushing devices are different.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a slag waste heat recovery moving bed device, which is characterized in that slag cotton scrapers are arranged on two sides of a granulation rotating cup and reciprocate on the side surface of the granulation rotating cup, so that the cutting of the slag cotton around the granulation rotating cup is realized, and the agglomeration of the slag cotton around the granulation rotating cup is avoided; the material leveling device is arranged to realize the carding of the surface of the material layer, so that the material layer is homogenized; the crushing of large-particle-size slag blocks or slag cotton clusters is realized by arranging a roller damage device; by arranging the air distribution mechanism, the loosening of the particle layer is ensured, the slag particles are prevented from being thermally bonded, the smooth discharging is ensured, and the heat exchange efficiency is effectively improved.
Furthermore, the slag wool scraper adopts a zigzag structure, so that the cutting of the slag wool around the granulation rotating cup is realized, the cut slag wool falls into the moving bed under the action of gravity to continue heat exchange, and the waste heat recovery efficiency is improved.
Furthermore, the air distribution mechanism adopts two-stage air distribution, so that the heat exchange efficiency is enhanced, and the heat loss is avoided; the cloth tuber pipe stirs the vibration in the bed of material under vibrating motor's drive, has ensured the porosity of grained layer, has effectively avoided the granule to bond, has ensured that the granule is discharged smoothly.
Furthermore, the distance between the air supply air caps is set to be more than two times of the diameter of the air distribution pipe, so that the heat exchange efficiency is effectively improved, and meanwhile, the bottom of the moving bed is not blocked by slag blocks or slag wool.
Furthermore, a plurality of inverted U-shaped structures or diameter air pipes are arranged on the second-stage air distribution pipe, the inverted U-shaped structures or the vertical air pipes extend into the material layer with higher upper temperature, the cooling working medium with lower temperature exchanges heat with the semi-molten particles, the heat exchange efficiency is improved, and the vitrification conversion rate of the semi-molten particles is ensured.
Drawings
FIG. 1 is a front view of a slag waste heat recovery moving bed apparatus according to the present invention;
fig. 2 is a side view of a slag waste heat recovery moving bed apparatus according to the present invention.
Wherein, 1 heat exchange bin, 2 cotton slag scrapers, 3 material flattening devices, 4 roller crushing devices, 5 air distribution mechanisms, 6 first air supply air caps, 7 inverted U-shaped structures, 8 second air supply air caps and 9 granulation rotating cups; 11 installation spaces, 51 a first-stage air distribution pipe and 52 a second-stage air distribution pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in attached figures 1-2, the invention provides a slag waste heat recovery moving bed, which comprises a heat exchange bin 1, a slag wool scraper 2, a flattening device 3, a roller crushing device 4 and an air distribution mechanism 5.
The heat exchange bin 1 is arranged below the granulating bin, the center of the heat exchange bin 1 is provided with an installation space 11 of the granulating device, and the granulating rotor 9 is arranged on the installation space 11; the slag cotton scrapers 2 are arranged on two sides of the granulation rotating cup 9, and the slag cotton scrapers 2 are arranged at the joint of the rest granulation rotating cups 9 of the heat exchange bin 1; the lower part of the slag wool scraper 2 is provided with a material flattening device 3, the lower part of the material flattening device 3 is provided with a roller crushing device 4, and the lower part of the roller crushing device 4 is provided with an air distribution mechanism 5.
The slag cotton scraper 2 is arranged on two sides of the granulation revolving cup 9 in an angle of 180 degrees, and the slag cotton scraper 2 adopts a zigzag structure; the slag wool scraper 2 can reciprocate on the side surface of the granulation rotating cup 9, so that the slag wool around the granulation rotating cup 9 is cut off, and the cut slag wool falls into the heat exchange bin 1 under the action of gravity; the slag wool scraper 2 is made of 310S stainless steel high-temperature-resistant materials.
The material flattening device 3 is arranged below the slag wool scraper 2 and is positioned at the upper high-temperature section of the heat exchange bin 1; the material flattening devices 3 are symmetrically arranged on two sides of the granulation rotating cup 9, the material flattening devices 3 are connected with the motor and driven by the motor to reciprocate, the material bed surface is combed in a reciprocating mode, and the effect of material bed uniformity is achieved. The material leveling device 3 adopts air-cooled rakes which are symmetrically arranged at two sides of the granulation rotating cup 9, and air exhaust devices are uniformly arranged on the air-cooled rakes.
The roller crushing device 4 is arranged below the material flattening device 3 and is positioned at the middle temperature part of the heat exchange bin 1; the roller crushing devices 4 are symmetrically arranged on two sides of the granulating rotating cup 9, the roller crushing devices 4 are provided with a plurality of air-cooled roller crushing devices in pairs, the air-cooled roller crushing devices are connected with two ends of the heat exchange bin 1, and the rotating directions of each pair of air-cooled roller crushing devices are different; the slag blocks or slag cotton clusters with larger grain diameters are cut off through the air-cooled roller crushing device, the slag blocks or slag cotton clusters with larger grain diameters form small slag blocks after being crushed by the air-cooled roller crushing device, and the small slag blocks continue to exchange heat in the heat exchange bin.
The air distribution mechanism 5 comprises a first-stage air distribution pipe 51 and a second-stage air distribution pipe 52, the first-stage air distribution pipe 51 is arranged at the bottom of the heat exchange bin 1, and the second-stage air distribution pipe 52 is arranged above the first-stage air distribution pipe 51; both ends of the first-stage air distribution pipe 51 and the second-stage air distribution pipe 52 are flexibly connected with the side wall of the heat exchange bin 1 and are connected with a vibration motor; a plurality of first air supply air caps 6 are uniformly arranged on the first-stage air distribution pipe 51, and the distance between every two adjacent first air supply air caps 8 is more than 2 times of the diameter of the first-stage air distribution pipe 51;
the second air distribution pipe 52 has three arrangement forms:
1) a plurality of inverted U-shaped structures 7 are uniformly arranged on the second-stage air distribution pipe 52 at intervals, the openings of the inverted U-shaped structures 7 are downward, the arc sections extend upward, and second air supply hoods 8 are arranged above the arc sections of the inverted U-shaped structures 7;
2) a plurality of inverted U-shaped structures 7 are uniformly arranged on the second-stage air distribution pipe 52 at intervals, the openings of the inverted U-shaped structures 7 are downward, the arc sections extend upward, and air outlets are arranged below the arc sections of the inverted U-shaped structures 7;
3) a plurality of vertical air pipes are uniformly arranged on the second-stage air distribution pipe 52 at intervals, and air caps are arranged at the upper ends of the vertical air pipes.
Wherein, the height of the inverted U-shaped structure can extend into the material layer above 800 ℃.
According to the slag waste heat recovery moving bed device, the slag cotton scrapers are arranged on the two sides of the granulation rotating cup and reciprocate on the side surface of the granulation rotating cup, so that the cutting of the slag cotton around the granulation rotating cup is realized, and the agglomeration of the slag cotton around the granulation rotating cup is avoided; the material leveling device is arranged to realize the carding of the surface of the material layer, so that the material layer is homogenized; the crushing of large-particle-size slag blocks or slag cotton clusters is realized by arranging a roller damage device; through setting up the cloth wind mechanism, guaranteed the loose of grained layer, avoided the sediment grain to return the heat bonding, guaranteed the smooth and easy of arranging the material, effectively improved heat exchange efficiency for factors such as cooling time, cooling air volume, the cooling effect of high temperature granule in the removal bed reach more reliable assurance.
Examples
The liquid slag discharged from the blast furnace firstly passes through a liquid slag cache and a flow measurement and control device (a slag ladle, a combustion device, a flue gas pipeline, a flow measurement and control module and a flow control device), wherein the combustion device is arranged at the top of the slag ladle and is communicated with the inside of the slag ladle, the side surface of the slag ladle is communicated with the flow measurement and control module, the slag ladle is connected with the flow measurement and control module through the flue gas pipeline, and the flow control device is arranged in the flow measurement and control module). Then the liquid slag enters a slag dropping pipe (a slag dropping pipe fixing device with preheating and cooling functions is arranged to solve the problems that the slag dropping pipe is easy to block and break, the slag dropping pipe fixing device is seriously corroded at high temperature and the like in the centrifugal granulation process of the liquid slag). Liquid slag is discharged into the centrifugal granulating unit through a slag dropping pipe, and after centrifugal granulation, the liquid slag drops into the moving bed in a semi-molten particle state to perform gas-solid heat exchange.
According to the slag waste heat recovery moving bed device, the slag wool scraper is arranged at the connecting end of the heat exchange bin and the granulating rotating cup; the slag wool scrapers are arranged on two sides of the granulation rotating cup at 180 degrees and are made of 310S stainless steel high-temperature-resistant materials according to the structural design of the saw teeth. The air cooling rakes are arranged at the high-temperature section at the upper part of the moving bed, are arranged at two sides by adopting a symmetrical structure and can freely move along the radial direction of the moving bed in the heat exchange bin; meanwhile, air exhaust devices are symmetrically distributed on the air cooling rake.
The lower part of the air-cooled rake, namely the middle temperature section of the moving bed, is provided with an air-cooled roller crushing device; the air-cooled roller crushing devices are symmetrically distributed and are arranged at two ends in the heat exchange bin; the during operation drives with the motor and lets each pair of forced air cooling roll breaker rotate along different directions, utilizes the effect of shear force, lets the ejection of compact that the bed of material in the removal bed is more smooth and easy.
Except the main air inlet and the main air outlet, slag blocks and slag wool can be generated in slag granulation due to the change of the operating condition of the centrifugal granulation device and are blocked at the bottom of the moving bed heat exchange device; in order to provide space for the passage of the slag blocks and the slag wool, two stages of air distribution pipes are arranged at the lower part of the moving bed, namely a low-temperature section; the first-stage air distribution pipe 51 is arranged at the bottom of the heat exchange bin 1, and the second-stage air distribution pipe 52 is arranged above the first-stage air distribution pipe 51; both ends of the first-stage air distribution pipe 51 and the second-stage air distribution pipe 52 are flexibly connected with the side wall of the heat exchange bin 1 and are connected with a vibration motor; a plurality of first air supply air caps 6 are uniformly arranged on the first-stage air distribution pipe 51, the distance between the first air supply air caps and the first-stage air distribution pipe is designed to be large enough on the premise of ensuring enough air supply quantity, and the bottom of the moving bed is not blocked by slag blocks and slag wool; preferably, the distance between two adjacent first air supply hoods 8 is more than 2 times of the diameter of the first-stage air distribution pipe 51.
The second-stage air distribution pipe 52 adopts three arrangement forms:
1) a plurality of inverted U-shaped structures 7 are uniformly arranged on the second-stage air distribution pipe 52 at intervals, the openings of the inverted U-shaped structures 7 are downward, the arc sections extend upward, and second air supply hoods 8 are arranged above the arc sections of the inverted U-shaped structures 7;
2) a plurality of inverted U-shaped structures 7 are uniformly arranged on the second-stage air distribution pipe 52 at intervals, the openings of the inverted U-shaped structures 7 are downward, the arc sections extend upward, and air outlets are arranged below the arc sections of the inverted U-shaped structures 7;
3) a plurality of vertical air pipes are uniformly arranged on the second-stage air distribution pipe 52 at intervals, and air caps are arranged at the upper ends of the vertical air pipes; according to the actual situation, the inverted U-shaped structure or the vertical air pipe can be arranged to be high enough to enter the material layer at the temperature of over 800 ℃; the air with lower temperature directly exchanges heat with the semi-molten particles to promote the cooling of the semi-molten particles and ensure the conversion rate of the glass body of the semi-molten particles.
The inside of the inverted U-shaped structure or the vertical air pipe is communicated with cooling air, so that the cooling of the pipeline is ensured. An air cap is arranged on the upper part of the upper layer inverted U-shaped structure or the vertical air pipe; when the temperature of the particles is higher, cooling water is introduced into the air cooling rake of the material layer leveling device and the inverted U-shaped structure or the vertical air pipe at the bottom, so that liquid-solid heat exchange can be carried out while gas-solid heat exchange is carried out, the heat exchange is further enhanced, the heat in the particles of the moving bed is more fully recovered, and the heat loss is reduced.
When the particles fall from the granulating bin and enter the moving bed for heat exchange, in order to uniformly discharge the particles from the bottom of the moving bed, firstly, the air cooling harrow is arranged at the top of the heat exchange bin, the air cooling harrow is driven by the motor to comb the surface of a material layer in a reciprocating manner to play a role of homogenizing the material layer, the lower part of the air cooling harrow is provided with the air cold rolling roller crusher, so that the discharge can be smoother, and at the bottom of the moving bed, the vibration motor drives the two-stage air distribution pipe to vibrate under the driving of the vibration motor, and simultaneously drives the inverted U-shaped structure or the vertical air pipe to stir and vibrate in the material layer, so that the loosening of the particle layer is ensured.
At the initial stage of system operation, when the rotating speed of the granulation rotating cup is too high or the temperature of equipment is too low, a large amount of slag wool is formed in the centrifugal granulation process; the slag wool is generated and then surrounds the periphery of the granulation rotating cup, and in order to prevent the slag wool from agglomerating around the granulation rotating cup, a sawtooth scraper capable of reciprocating is arranged on the side surface of the granulation rotating cup to cut off the slag wool around the granulation rotating cup; under the action of gravity, the broken slag wool falls into the heat exchange bin and is discharged out of the heat exchange bin after being crushed and subjected to heat exchange.
When the components and the temperature of the molten slag fluctuate, the operating condition of the centrifugal granulating unit changes, which can cause slag blocks and slag wool to appear in the molten slag granulation; slag blocks are too large, so that slag remelting can be caused, cooled particles are bonded, and larger slag blocks are formed; the agglomeration of the slag wool can cause unsmooth particle discharge and finally block the moving bed; in order to crush the slag blocks and slag cotton when the slag blocks just enter the moving bed, an air cooling rake and an air cooling roller crushing device are arranged at the upper part of the moving bed; the air-cooled harrow is driven by a motor to comb the material bed surface in a reciprocating manner, large slag blocks and slag cotton clusters are pushed to roller crushers at two sides of the moving bed, the large slag blocks and the slag cotton clusters are crushed by the roller crushers to form small slag blocks, and heat exchange is continuously carried out.
The top wall of the granulating bin is provided with a temperature measuring device and a slag dropping pipe; a granulating rotating cup is arranged at the joint of the granulating bin and the heat exchange bin and is used for granulating blast furnace slag falling from the slag falling pipe; the granulation rotating cup is positioned right below the slag falling pipe, and a partition wall is arranged at the granulation rotating cup; the slag wool crushing device is arranged on the partition wall and is used for crushing slag wool falling onto the partition wall; the position of the moving bed is lower than that of the slag wool crushing device, the shearing device and the crusher are arranged in the granulation bin, the shearing device can reciprocate, and the position of the crusher is lower than that of the shearing device; the bottom of the granulating bin is a bulk material stacking part; the temperature measuring device is used for measuring the temperature of the surface of the bulk material stacking layer in the bulk material stacking part; a cooling air pipeline is arranged at the bottom of the granulating bin; the temperature measuring device is an infrared temperature measuring device; the slag wool crushing device is a sawtooth scraper or a shearing roller; the shearing device is of a staggered shearing structure and comprises a staggered handle, staggered sawteeth and a connecting structure; wherein, the direction of the saw teeth is upward, and the saw teeth can be folded when the handle is close to the handle; a cooling medium is arranged in the shearing device; the cooling medium is gas, water or an organic medium; the crusher is arranged between the shearing device and the bulk material stacking part; the cooling air pipeline is provided with a plurality of air outlets, and each air outlet is provided with an air cap; in the early stage of system operation, when the cooling speed is too low, a large amount of slag wool is formed in the granulation process. The slag wool is surrounded around the rotating cup after being generated, and the slag wool crushing device on the partition wall cuts off the slag wool around the rotating cup, so that the slag wool is prevented from being agglomerated around the rotating cup, and accidents are reduced. Under the action of gravity, broken slag wool falls into the moving bed heat exchange device, the shearing device cuts up the slag wool and falls into the crusher below, the slag wool is further cut off, and the phenomenon that the slag wool is agglomerated to cause unsmooth particle discharge and block the moving bed is prevented. In the device, after the slag wool is cut off and crushed in a large quantity, the heat exchange is enhanced, and the waste heat recovery rate is improved. The slag wool crushing device is equipment with a shearing function and can be a sawtooth scraper; the shearing device is of a staggered shearing structure, is similar to a clipper for hairdressing, and consists of a staggered handle, staggered saw teeth and a connecting structure, wherein the direction of the saw teeth is upward, and when the handle is close to the connecting structure, the saw teeth are folded; reciprocating on the upper part of the moving bed.
The above description is only illustrative of the preferred embodiments of the present invention, and any structural changes, improvements, modifications, etc. made without departing from the principle of the present invention are deemed to be within the scope of the present invention.
Claims (10)
1. A slag waste heat recovery moving bed device is characterized by comprising a heat exchange bin (1), a slag cotton scraper (2), a material flattening device (3), a roller crushing device (4) and an air distribution mechanism (5);
the heat exchange bin (1) is arranged below the granulating bin, the center of the heat exchange bin (1) is provided with an installation space (11) of the granulating device, and the granulating rotating cup (9) is installed on the installation space (11); slag cotton scrapers (2) are arranged on two sides of the granulation rotating cup (9), and the slag cotton scrapers (2) are arranged at the joint of the residual granulation rotating cup (9) of the heat exchange bin (1); the lower part of the slag wool scraper (2) is provided with a material flattening device (3), the lower part of the material flattening device (3) is provided with a roller crushing device (4), and the lower part of the roller crushing device (4) is provided with an air distribution mechanism (5).
2. A slag waste heat recovery moving bed apparatus according to claim 1, wherein the slag wool scrapers (2) are arranged at 180 ° on both sides of the granulation rotor (9), and the slag wool scrapers (2) are of a zigzag structure.
3. The slag waste heat recovery moving bed device according to claim 1, wherein the air distribution mechanism (5) comprises a first air distribution pipe (51) and a second air distribution pipe (52), the first air distribution pipe (51) is arranged at the bottom of the heat exchange bin (1), and the second air distribution pipe (52) is arranged above the first air distribution pipe (51); both ends of the first-stage air distribution pipe (51) and the second-stage air distribution pipe (52) are flexibly connected with the side wall of the heat exchange bin (1) and connected with a vibration motor.
4. A slag waste heat recovery moving bed device according to claim 3, characterized in that a plurality of first air supply caps (6) are uniformly arranged on the first-stage air distribution pipe (51), and the distance between two adjacent first air supply caps (8) is more than 2 times of the diameter of the first-stage air distribution pipe (51).
5. A slag waste heat recovery moving bed device according to claim 3, characterized in that a plurality of inverted U-shaped structures (7) are uniformly arranged on the second-stage air distribution pipe (52) at intervals, the openings of the inverted U-shaped structures (7) are downward, and the arc sections extend upward.
6. A slag waste heat recovery moving bed apparatus according to claim 5, characterized in that a second air supply hood (8) is arranged above the circular arc section of the inverted U-shaped structure (7).
7. A slag waste heat recovery moving bed apparatus according to claim 5, characterized in that an air outlet is arranged below the circular arc section of the inverted U-shaped structure (7).
8. A slag waste heat recovery moving bed apparatus according to claim 3, wherein a plurality of vertical air pipes are arranged on the second stage air distribution pipe (52) at regular intervals, and the upper ends of the vertical air pipes are provided with air caps.
9. A molten slag waste heat recovery moving bed apparatus according to claim 1, wherein the material leveling device (3) adopts air-cooled rakes which are symmetrically arranged at both sides of the granulation rotating cup (9), and the air-cooled rakes are uniformly provided with air exhaust devices.
10. The slag waste heat recovery moving bed device according to claim 1, wherein the roll crushing devices (4) are symmetrically arranged at two sides of the granulation rotating cup (9), the roll crushing devices (4) adopt a plurality of pairs of air cooling roll crushing devices, the air cooling roll crushing devices are connected with two ends of the heat exchange bin (1), and the rotating direction of each pair of air cooling roll crushing devices is different.
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