CN117385113A - High-temperature slag waste heat recovery system and process thereof - Google Patents

Abstract

The invention belongs to a high-temperature slag waste heat recovery device and a high-temperature slag waste heat recovery process, in particular to a high-temperature slag waste heat efficient recovery system and a high-temperature slag waste heat efficient recovery process, wherein three parts of a slag pot tipping machine (1), a crushing and granulating machine (2) and an annular cooler (3) are arranged from top to bottom; the slag pot tipping machine (1) is controlled by a hydraulic system, and the movable tipping table rotates around the fixed bracket; the crushing and granulating machine (2) consists of a feeding funnel, a driving machine, a granulating wheel, a granulating medium channel, a box body, a slag baffle and the like; the annular cooler (3) is composed of a transmission device, a revolving body part, a pressing rail, a hopper, an air box and the like, and the whole cooler is in a sealing mode. The related process provides for including the following data: slag granularity, density, temperature and slag specific heat, the cooling time and the sectional temperature of the annular cooler (3) and the like. The invention has no waste water and waste gas discharge, no tail gas in the subsequent boiler, high-efficiency utilization of heat, extremely low heat waste and energy conservation. Saving circulation of crushing granulatorThe circulating water is 5-7 m ³ And/t, the power cost is greatly reduced, the electricity consumption is reduced, and the environmental protection equipment cost is reduced.

Description

High-temperature slag waste heat recovery system and process thereof

Technical Field

The invention relates to a high-quality waste heat resource recovery technology of high-temperature slag waste heat, in particular to a high-efficiency recovery system of high-temperature slag waste heat and a process thereof.

Background

In iron and steel enterprises, high-temperature slag usually contains valuable metal components such as iron, steel, copper and the like, and the treatment and disposal of the slag are always focused, because the slag not only pollutes the environment, but also is a resource wasting action. The slag releases a large amount of heat during the cooling process from a high temperature state, and the temperature of the slag is usually above 1000 ℃, so that the temperature of the residual heat of the slag is high, the heat is sufficient, the heat can be utilized, and the temperature of the slag decreases during the cooling process, and finally, the slag is crystallized and hardened, and the treatment becomes more complicated and difficult.

The high-temperature slag waste heat is efficiently recovered, slag heat energy is subjected to heat exchange with other fluids or air through a heat exchanger, the heat is converted into heat energy which can be directly utilized, the slag is subjected to cooling treatment, the slag can be placed in cooling equipment for cooling, and then the heat in the slag is recovered. The tail gas discharged in the slag cooling process can also be utilized, and the tail gas is recycled through a recycling device. At present, water quenching technology is mainly adopted in China to treat high-temperature slag. After the water flushing, a large amount of steam is generated, and meanwhile, pollutant acid gas is generated. The steam is directly discharged into the atmosphere, so that heat recovery cannot be performed, and the atmosphere is polluted by acid gas. Because the water temperature after slag flushing is low, the heat pump type slag smelting furnace is a low-grade heat source which is difficult to efficiently utilize, and the heat pump and other technologies are used for realizing low utilization efficiency, large pollution and difficult investment recovery in a short period, and the sensible heat of smelting slag is a high-grade waste heat resource and has high recovery value.

The high-temperature slag is required to be granulated or crushed before heat exchange, and the high-temperature slag is generally solid-liquid mixture, so that the conventional granulating or crushing device can only granulate liquid slag or crush solid slag and cannot granulate the mixture of liquid slag and solid slag because the problems of sticking and cooling are solved; in addition, the traditional solid waste heat recovery device (solid waste heat boiler, rotary heat exchange device and the like) can only recover waste heat of solid grain slag, has high granularity requirement on the solid slag, generally requires the granularity range to be 3-5 mm, and has low waste heat recovery efficiency if the granularity is different. Therefore, the energy consumption in the granulating step is very high, so that the recovery of the waste heat of the high-temperature slag becomes uneconomical. Conventional ring coolers can only accept solid granulated particles at temperatures around 800 deg..

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the crushing and granulating device is enabled to granulate the solid-liquid mixed slag, and meanwhile, the granulated slag particles are cooled to become solid-state granular slag. The solid waste heat recovery device (annular cooler) is improved, so that the solid waste heat recovery device has low requirement on the granularity of solid slag and can accept-1200 ℃ high-temperature particles. So that the recovery of the waste heat of the high-temperature slag becomes feasible and economical.

The high-temperature slag waste heat efficient recovery system is characterized in that three parts of a slag pot tipping machine 1, a crushing and granulating machine 2 and an annular cooler 3 are sequentially arranged from top to bottom in the process of collecting, storing and transporting high-temperature slag to the end of waste heat recovery;

the slag pot tipping machine 1 is characterized in that a hydraulic system controls a movable tipping table to rotate around a fixed bracket;

the crushing granulator 2 is composed of a feeding funnel 2-1, a driving machine, a granulating wheel 2-5, a box body 2-6 and a stop iron protecting plate 2-4;

the annular cooler 3 consists of a transmission device, a revolving body part, a pressing rail, a feeding hopper and an air box, and is integrally in a sealing mode;

the crushing granulator 2 is in a box shape and is divided into a feeding cavity and a blanking cavity which are communicated left and right;

a feeding funnel 2-1 is arranged above the feeding cavity, and a first air inlet 2-3 facing obliquely downwards is arranged at one side of the feeding funnel 2-1; the lower edge of the first air inlet 1 is provided with a material guide plate 2-9 for guiding materials to the granulating wheel 2-5; the other side of the feeding funnel 2-1 is provided with a downward third air inlet 2-2; a second air inlet 2-8 is arranged below the first air inlet 1; the inside of the feeding cavity is provided with a granulating wheel 2-5 which is driven by a motor and a main shaft in the horizontal direction, a plurality of rows of protruding granulating teeth are welded and fixed on the surface of the granulating wheel 2-5, the positions of two adjacent rows of granulating teeth are triangular, and the surfaces of the granulating teeth are overlaid with a high-temperature resistant and wear-resistant alloy layer;

the inner wall of the blanking cavity is provided with a plurality of replaceable blocking iron protection plates 2-4 along the direction and the position of the splash track of the broken granulated slag particles.

The high-temperature slag waste heat recovery system comprises three parts of a slag pot tipping machine, a crushing and granulating machine and an annular cooler, which are not capable of forming a device system, and particularly the crushing and granulating machine which is suitable for the system and has unique action and effect is added.

The crushing and granulating machine can process slag which is solid or mixed with solid and liquid at the high temperature of 800-1700 ℃, and compared with the existing crushing and granulating machine, the temperature which can be processed is higher because 3 air inlets are designed on the crushing and granulating machine, and meanwhile, the feeding cavity is blown; the material falling above the granulating wheel is splashed toward the stopper protecting plate 2-4 after being hit, and then falls toward the discharge port. The rotating direction of the granulating wheel is utilized, only one grille protection plate 2-10 is needed to be designed at the position of the third air inlet 2-2, and the first air inlet and the second air inlet can basically avoid splashing generated after the granulating wheel hits the materials, so that the structure design is ingenious.

The efficient cooling function can be applied to solid or liquid-solid mixed high-temperature slag.

Further, a motor of the crushing and granulating machine drives a granulating wheel through a fixed torque coupling and a speed reducer;

the positions of two adjacent rows of granulating teeth on the surface of the granulating wheel are isosceles triangles;

the main shaft is a water-through cooling structure formed by a water pipe and a rotary joint, the main shaft adopts a self-aligning roller bearing, and the bearing seat adopts the water-through cooling structure;

the surface of the granulated tooth is overlaid with a high-temperature resistant and wear-resistant alloy layer with the thickness of 10-15 mm;

4-8 groups of replaceable stop iron protection plates are fixed on the inner wall of the box body through bolts.

In order to further improve the efficiency of the crushing and granulating machine and realize the invention in a more trouble-free way, some technical features and schemes for refining are provided.

Further, the slag pot tipping machine has the structure that: the movable overturning platform for placing the fixed slag pot is fixed on the fixed support through a rotating shaft, the extending end of a piston rod of a hydraulic cylinder of which the swinging shaft is fixed on the base of the fixed support is rotationally fixed at a different concentric position of the rotating shaft of the movable overturning platform, and the movable overturning platform can be turned from a 0-degree horizontal position to a 90-degree overturning position for casting and then reset to the 0-degree horizontal position.

Further, the main structure of the annular cooler is as follows:

1) The variable frequency motor drives the rotary frame to rotate through a speed reducer, an open gear and a chain wheel;

2) The revolving body part comprises a trolley, a revolving frame, a trolley roller arm, side rails, a supporting rail, a chain bracket, a chain and a trolley baffle plate, wherein two shafts are connected to the revolving frame and rotate along with the revolving frame, and the trolley is turned over and reset at a designated position by means of a pressing rail;

3) The pressing rail is used for limiting the turning of the trolley and the reset of the trolley after unloading, and consists of a straight rail and a curved rail;

4) The feeding hopper consists of a hopper, a partition wall and a flat material weight and is supported on a civil engineering platform;

5) A plurality of bellows are arranged on the frame, and the bellows are sealed with the revolving frame;

6) The discharging hopper is formed by welding steel plates and profile steel, and a storage self-grinding facility is arranged in the discharging hopper;

7) Sealing form: the sealing between the trolley and the bellows adopts mechanical sealing; and water sealing is adopted between the trolley and the smoke hood.

Still further, the trolley and the revolving frame rotate anticlockwise from top to bottom in a overlook view; 28 trolleys, 9 bellows, 9 dust discharging valves, 4 fans and 55000M air volume ³ /h；

Single machine processing capability: 60-95t/h; intermediate diameter of annular cooler: phi 12.5m; trolley width: 1800mm, main drive variable frequency motor rotational speed: 320-970r/min.

Preferably, the inner walls of the box bodies 2-6 are provided with wear-resistant linings, and a water cooling pipeline structure communicated with an external cooling water source is arranged between the outer walls of the box bodies and the wear-resistant linings.

A process according to the high temperature slag waste heat system described above, characterized in that:

the treatment result of the crushing and granulating machine is as follows: slag particle size: 0mm-80mm; temperature: 800-1700 ℃;

the cooling time of the annular cooler is 30-78min, the annular cooler is divided into four sections in a circle, the respective temperatures are 800-1000 ℃ of the waste gas of the first cooling section, 500-700 ℃ of the second cooling section, 200-500 ℃ of the third cooling section and 120 ℃ of the fourth cooling section, and the temperature difference range of each section is +/-10%.

The thickness of the material layer is 760+/-80 mm, and the wind pressure is as follows: 4300.+ -.10% Pa.

The invention has the beneficial effects that:

1) The novel process has no wastewater and waste gas discharge, the subsequent boiler has no tail gas, the heat is fully utilized, no heat waste is caused, and the energy conservation maximization is realized;

2) Realizing low-energy-consumption dry granulation of high-temperature slag, and ensuring that the latent heat of the slag is fully utilized;

3) The metallurgical slag granulator adopts a rotary granulator to mechanically crush slag and air to cool slag particles, so that the quality of granulated slag and the temperature of the slag particles can be ensured, the power cost is greatly reduced, the treatment capacity is high, and the influence of the high or low temperature of the slag is avoided.

4) The waste heat recovery of the annular cooler is adopted, the three-four sectional processes are carried out, a brand new combined mode is adopted for the sealing device, the air leakage rate is improved, meanwhile, in order to recover the annular cooler flue gas collecting cover, the circulating fan is used for conveying the utilized low-temperature flue gas to the lower bellows of the annular cooler, the closed circulation of the flue gas is formed, the newly added circulating fan can replace the original annular cooling fan to a relative extent, the power consumption is reduced, the power consumption can be effectively reduced, and in addition, the annular cooler realizes the heat exchange of materials with higher temperature (120-1300 ℃) than that of the traditional cooler.

4) Compared with a water quenching method, the technology has the advantages that 0.8-1.2 tons of fresh water is consumed for each 1 ton of slag to be punched, 10 tons of circulating water consumption can be saved, the novel process can avoid the waste of water resources, and the environmental pollution is reduced. The emission of the accompanying emission pollutants is greatly reduced, the environmental protection regulations are more met, and the environmental protection equipment cost is reduced.

5) The breaking granulating machine in the system is excellent in anti-blocking capacity and cooling capacity, can granulate liquid slag and break solid slag, and can cool the granulated slag and keep a solidification state. The novel annular cooler is matched with the improvement of the high temperature resistance of the annular cooler to the high temperature slag in the subsequent process to a certain extent, so that the requirement range of granularity is wide, the granulating consumption has the effect of low energy consumption, and the waste heat recovery of the high temperature slag becomes feasible and is economical.

6) The range of the requirements for granularity is wide: the energy consumption for granulating is very low as long as the particle size is 2-80 mm.

7) The crushing and granulating device is enabled to granulate the solid-liquid mixed slag, and meanwhile, the granulated slag particles are cooled to become solid-state granular slag. And the sealing and temperature resistance of the solid waste heat recovery device (annular cooler) are improved, so that the solid waste heat recovery device has low requirement on granularity of solid slag and can accept-1300 ℃ high-temperature particles. So that the high-temperature slag waste heat recovery of the whole system becomes feasible and economical.

Drawings

FIG. 1 is a front view of the entire system of the high temperature slag waste heat recovery system of the present invention, as viewed from the horizontal direction;

fig. 2 is a top view of fig. 1.

Fig. 3 is a front view of the breaking granulator.

Fig. 4 is a left side view of the breaking granulator. In the figure;

1 slag pot tipping machine, 1-1 slag pot, 1-2 movable tipping table, 1-3 rotating shaft, 1-4 fixed bracket, 1-5 hydraulic cylinder piston rod, 1-6 rotating shaft and 1-7 swinging shaft;

2 crushing granulator, 2-1 feeding hopper, 2-2 third air inlet, 2-3 first air inlet, 2-4 blocking iron protection plate, 2-5 granulating wheel, 2-6 box, 2-7 discharge gate, 2-8 second air inlet, 2-9 stock guide, 2-10 grille protection plate, 2-11 support.

The device comprises a 3 annular cooler, a 3-1 trolley, a 3-2 pressure rail, a 3-3 fan, a 3-4 bellows, a 3-5 ash discharge valve, a 3-6 revolving frame and a 3-7 motor;

Detailed Description

The following describes the structural components of the system and the corresponding process requirements in detail with reference to the drawings, and some of the structural components are adopted to achieve better technical effects.

Firstly, a new process method is adopted, a hydraulic tilting device of the slag pot is powered by a hydraulic station, the slag pot 1-1 is turned from a 0-degree horizontal position to a 90-degree tilting position by a hydraulic cylinder for casting, and after casting is finished, the slag pot is reset to the 0-degree horizontal position. The device mainly comprises an movable overturning platform 1-2, a rotating shaft 1-3, a fixed support 1-4, a bearing seat, a support, a hydraulic cylinder, a hydraulic station and the like. The slag pot fixing device is arranged on the movable overturning platform 1-2, so that the slag pot 1-1 can be safely and stably fixed on the movable overturning platform 1-2 in the overturning process. When the crane lifts the fully loaded slag pot 1-1 to the upper part of the movable overturning platform 1-2 to prepare for the pot falling, the slag pot 1-1 can be accurately positioned by the slag pot fixing device, and the slag pot is stably placed on the movable overturning platform 1-2. The hydraulic station is then activated to begin tipping: the quick valve is started first, the piston rod 1-5 of the hydraulic cylinder extends out, and the movable overturning platform 1-2 and the slag pot 1-1 start to rotate around the rotating shaft 1-3 from a horizontal position of 0 degrees. After the emptying of the slag liquid is confirmed, the quick valve is started again, so that the slag pot 1-1 quickly falls back to the 0-degree horizontal position, and when the movable overturning platform 1-2 is firmly arranged on the supporting position of the fixed support 1-4, the quick valve is closed, so that the casting work of the pot is completed.

(II) granulating machine

The granulating wheel 2-5, the stop iron protecting board 2-4 and other parts of the main granulating machine work under high temperature condition, and are complex in stress and serious in abrasion, so that a wear-resistant and heat-resistant alloy hardening layer is required to be deposited on the working surface of the main granulating machine. The device mainly comprises a motor (with slip detection), a fixed torque coupling, a speed reducer, a main shaft assembly, a box body 2-6, an interlayer, a bracket, a main shaft cooling device and the like.

Crushing capacity: 20-60t/h;

treatment of slag particle size: 0mm-80mm;

temperature: 800-1700 DEG C

(III) an annular cooler portion: the main treatment material types are hot slag, and the design parameters are as follows:

(1) Single machine processing capability: 50-95t/h;

feed temperature: 1250 DEG C

Feed particle size: 8-50 mm

Discharge temperature: less than 150 DEG C

Bulk specific gravity of material: 1.7t/m3

Intermediate diameter of annular cooler: phi 12.5m

Trolley width: 1500-2000 mm

Layer thickness: 760mm

Main drive motor speed: 320-970r/min

Normal cooling time: 30-78min

(2) The sealing mode adopts: upper water seal

Lower mechanical seal + flexible seal

The rotation direction of the equipment is as follows: counterclockwise rotation (overlook)

Number of trolleys: number of 28 bellows: 9 ash discharge valves 9

And (3) a fan: 4 tables

Air volume: 55000M ³ /h

Wind pressure: 4300Pa

Emphasis on the mechanical device part:

(1) Slag pot hydraulic tipping machine:

1) Movable overturning platform

The movable overturning platform 1-2 is mainly used for placing the slag pot 1-1 and driving the slag pot 1-1 to rotate around the rotating shaft 1-3 together for overturning casting. The movable overturning platform 1-2 consists of a bottom plate, a slag pot fixing device, a bracket group and a stop block. A through round hole is formed at the top of the extending end of the bracket group and is used for installing a rotary shaft 1-3, so that the movable overturning platform 1-2 rotates around the fixed bracket 1-4 by taking the point as a fulcrum. The slag pot fixing device is respectively arranged on the bottom plate bracket group and the connecting plate of the movable overturning platform 1-2. A pair of clamping grooves with guiding function are arranged at the front edge and the rear edge of the bottom plate of the slag ladle and welded with the bottom plate to clamp the cross rib plate at the bottom of the slag ladle 1-1. Considering that the slag pot is expanded by heating, the width of the clamping groove is slightly larger than the width of the rib plate at the bottom of the slag pot 1-1. The upper part of the clamping groove is welded with a guide plate, so that a crane can conveniently and smoothly hang the slag pot 1-1 into the clamping groove. When the movable overturning platform 1-2 rotates to 90 degrees, the clamping groove and the stop block in the slag pot fixing device can prevent the slag pot 1-1 from being overturned. And the gravity center of the slag pot 1-1 is arranged in the bottom direction of the slag pot 1-1 in the tipping center, and even if the slag pot 1-1 is not limited by a fixing device, the slag pot 1-1 can be automatically reset, so that double protection is provided to ensure that the slag pot 1-1 cannot be overturned.

2) Fixed brackets 1-4

The fixed bracket 1-4 is used for providing a tilting pivot for the movable overturning platform 1-2 and providing a supporting position when the movable overturning platform 1-2 horizontally falls. The fixing brackets 1-4 are of frame type symmetrical structures and consist of a bottom plate and brackets. A supporting plate is arranged at the top of the first bracket group, so that the movable overturning platform 1-2 is conveniently supported. A set of bearing blocks is mounted on the base plate for mounting the intermediate trunnions of the hydraulic cylinder.

3) Hydraulic system

The hydraulic cylinder is a jacking mechanism which rotates the movable overturning platform 1-2 around the rotating shaft 1-3 to enable the slag pot to be poured in a overturning way, and is arranged at two sides of the movable overturning platform. The middle trunnion of the hydraulic cylinder is arranged on the fixed bracket through a bearing seat, and the power of the hydraulic cylinder is provided by a hydraulic station. The hydraulic station is provided with a fast valve and a slow valve. The fast valve can enable the piston rod to stretch and retract fast, and the slow valve can enable the slag pot 1-1 to tip over at a slower speed during pouring.

(2) Slag granulator

1) Feeding hopper 2-1 and drive arrangement:

the feeding hopper 2-1 part of the slag granulator is used for better discharging. The driving device consists of a motor, a fixed torque coupler, a speed reducer, a transmission base and the like. The motor adopts a Y3 series motor, and the motor and the speed reducer are connected by a constant torque coupler. When the granulating device exceeds the load, the torque exceeds a set value, the fixed torque coupling slips, and a slip detector detects and controls the crusher to stop and equipment to interlock so as to protect the motor and the granulating device.

2) Granulating wheel:

the granulating wheel 2-5 consists of a main shaft, granulating teeth, a bearing seat, a main shaft cooling device and the like. The main shaft is forged by 35# carbon steel, the forging needs to meet the forging ratio requirement of the I-level forging, and ultrasonic flaw detection is carried out to reach 3 levels without dense defects as qualified. The main shaft is provided with 14 rows of crushing teeth, each row of crushing teeth is circumferentially distributed with 3, the crushing teeth are welded with the main shaft along the circumferential direction, and each crushing tooth is overlaid with a high-temperature-resistant and wear-resistant alloy layer with the thickness of 10-15mm, so that the service life of the crushing teeth is prolonged. The Rockwell hardness of the surface of the surfacing layer is more than 60 HRC. When the crushing teeth are welded with the main shaft, the positions of adjacent teeth are staggered by 60 degrees, so that the motor power can be fully utilized, and peak load can be relatively reduced.

The main shaft adopts water cooling, so that the normal use of the main shaft is ensured. The main shaft water cooling device consists of a water pipe, a rotary joint and the like.

The bearing of the main shaft adopts a self-aligning roller bearing, the bearing seat adopts water cooling to prolong the service life of the bearing, the lubrication adopts centralized automatic lubrication, and the oil is supplied by a lubrication station of the sintering machine.

3) 2-6 parts of box body and 2-4 parts of stop iron protection plate:

the box body 2-6, the iron baffle plates 2-4 and the iron baffle plates are welded by steel plates, slag particles are crushed and granulated according to a specified track, and 4 replaceable iron baffle plates 2-4 are arranged at the upper part of the interior. The structural design requirement of the device can facilitate maintenance and maintenance of the granulating wheel, the material guiding launder, the stop iron and the like.

(3) Main parts of the annular cooler 3

1) The transmission device is in chain wheel transmission and double transmission configuration, and the variable frequency motor 3-7 is adopted to drive the pin teeth fixed on the revolving frame 3-6 to rotate through the speed reducer, the open gear and the chain wheel, so that the revolving frame 3-6 rotates.

2) The revolving body part consists of a trolley 3-1, a revolving frame 3-6, a trolley roller arm, side rails, a supporting rail, a chain bracket, a chain, a trolley baffle plate and the like. The trolley is of a special heat-resistant rivet welding structure, is connected to the revolving frame 3-6 through two shafts, rotates along with the revolving frame 3-6, and realizes overturning and resetting of the trolley 3-1 at a designated position by means of the pressing rail 3-2. The revolving frame 3-6 is formed by welding steel plates, the inner frame and the outer frame are connected by a transverse triangular beam, the revolving frame 3-6 is supported by a supporting roller, a side blocking roller is arranged to prevent the revolving frame 3-6 from deviating, and the track is made of U71Mn.

3) The pressing rail 3-2 is used for limiting the turning of the trolley 3-1 and the reset of the trolley 3-1 after unloading, and consists of a straight rail and a curved rail, and the pressing rail 3-2 is made of NM360 so as to prolong the service life of the trolley.

4) The feeding hopper consists of a hopper, a partition wall and a flat material weight, and is supported on a civil engineering platform, and the flat material weight in the feeding hopper can keep the height of the material layer of the trolley 3-1 at a certain height, so that the flat material weight is made of heat-resistant cast steel.

5) 9 bellows 3-4 are provided, and are arranged on the frame, and the bellows 3-4 are sealed with the revolving frame 3-6.

6) The discharging hopper is formed by welding steel plates and profile steel, and the time for keeping the buffering time of the discharging system is as large as possible within the allowable range; the inside of the discharge hopper is provided with a storage self-grinding facility, so that the abrasion of materials to the hopper is prevented.

7) Sealing form: the sealing between the trolley 3-1 and the bellows 3-4 adopts a mechanical sealing mode; the sealing between the trolley 3-1 and the fume hood adopts water sealing.

8) The manufacturing of main parts requires precision assurance: the diameter error of the rotating part is smaller than 3mm, and the concentricity of the inner ring and the outer ring is smaller than phi 3mm. The flatness error is less than 2mm, and the coupling error is less than 0.04mm (reaming).

The error between the diameters of the supporting steel rail and the side rail is less than 3mm. The diameter error of the chain is +/-1 mm. The connection parts of the bolts ensure no deformation in alignment.

In the above embodiments, some values are within a certain range according to the requirements of the present technical solution, and some values are at a certain point in the range. Finally, it is to be understood that the above embodiments are merely exemplary embodiments employed for the purpose of illustrating the principles of the present invention, however, the present invention is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the principles and spirit of the invention, and such modifications and improvements are also considered within the scope of the invention.

Claims (8)

1. The utility model provides a high temperature slag waste heat recovery system which characterized in that: the high-temperature slag collection and storage are carried out from top to bottom until the waste heat recovery is finished, and three parts of a slag pot tipping machine (1), a crushing granulating machine (2) and an annular cooler (3) are sequentially arranged;

the slag pot tipping machine (1) is characterized in that a hydraulic system controls a movable tipping table to rotate around a fixed bracket;

the crushing and granulating machine (2) consists of a feeding funnel (2-1), a driving machine, granulating wheels (2-5), a box body (2-6) and a stop iron protection plate (2-4);

the annular cooler (3) consists of a transmission device, a revolving body part, a pressing rail, a feeding hopper and an air box, and the whole cooler is in a sealing mode;

the crushing and granulating machine (2) is in a box shape and is divided into a feeding cavity and a blanking cavity which are communicated left and right;

a feeding funnel (2-1) is arranged above the feeding cavity, and a first air inlet (2-3) facing obliquely downwards is arranged at one side of the feeding funnel (2-1); the lower edge of the first air inlet (1) is provided with a material guide plate (2-9) for guiding materials to the granulating wheel (2-5); a third air inlet (2-2) facing downwards is arranged at the other side of the feeding funnel (2-1); a row of grille protection plates (2-10) are arranged on the inner wall of the feeding cavity at the positions corresponding to the third air inlet (2-2); a second air inlet (2-8) is arranged below the first air inlet (1); the inside of the feeding cavity is provided with a granulating wheel (2-5) driven by a motor and a main shaft in the horizontal direction, the surface of the granulating wheel (2-5) is welded and fixed with a plurality of rows of protruding granulating teeth, the positions of two adjacent rows of granulating teeth are triangular, and the surfaces of the granulating teeth are overlaid with a high-temperature resistant and wear-resistant alloy layer;

the blanking cavity inner wall sets up a plurality of removable back iron protection boards (2-4) along broken granulation slag particle splash track's direction and position, and granulation wheel (2-5) pivoted direction is: so that the material falling above the protective plate is splashed towards the stop iron protective plate (2-4) after being hit.

2. The high temperature slag waste heat recovery system of claim 1, wherein: the top of the blanking cavity is an obliquely downward top plate, and the stop iron protection plates (2-4) are arranged below the top plate one by one.

3. The high-temperature slag waste heat recovery system according to claim 1, wherein the motor of the crushing granulator (2) drives the granulating wheels (2-5) through a fixed torque coupling and a speed reducer;

the positions of two adjacent rows of granulating teeth on the surface of the granulating wheel (2-5) are isosceles triangles;

the main shaft is a water-through cooling structure formed by a water pipe and a rotary joint, the main shaft adopts a self-aligning roller bearing, and the bearing seat adopts the water-through cooling structure;

the surface of the granulated tooth is overlaid with a high-temperature resistant and wear-resistant alloy layer with the thickness of 10-15 mm;

the inner wall of the box body (2-6) is fixed with 4 replaceable baffle iron protection plates (2-4) by bolts.

4. The high temperature slag waste heat recovery system of claim 1, wherein the slag pot tipping machine (1) is structured as: the movable overturning platform (1-2) for placing the fixed slag pot (1-1) is fixed on the fixed support (1-4) through the rotating shaft (1-3), the extending end of the hydraulic cylinder piston rod (1-5) fixed on the base of the fixed support (1-4) is fixed at a different concentric position of the rotating shaft (1-6) of the movable overturning platform in a rotating mode, and the movable overturning platform can be overturned from a 0-degree horizontal position to a 90-degree overturning position for casting and then reset to the 0-degree horizontal position.

5. The high temperature slag waste heat recovery system as defined in claim 1, wherein the main structure of the annular cooler (3) is:

1) The driving machine is in chain wheel driving and double driving configuration, and the variable frequency motor (3-7) drives the rotary frame (3-6) to rotate through a speed reducer, an open gear and a chain wheel;

2) The revolving body part comprises a trolley (3-1), a revolving frame (3-6), a trolley roller arm, side rails, a supporting rail, a chain bracket, a chain and a trolley blocking plate, wherein two shafts are connected to the revolving frame (3-6) to rotate along with the revolving frame (3-6), and the trolley (3-1) is turned over and reset at a designated position by virtue of a pressing rail (3-2);

3) The pressing rail (3-2) is used for limiting the turning of the trolley (3-1) and the reset of the trolley after unloading, and consists of a straight rail and a curved rail;

4) The feeding hopper consists of a hopper, a partition wall and a flat material weight and is supported on a civil engineering platform;

5) A plurality of bellows are arranged on the frame, and the bellows are sealed with the revolving frame (3-6);

6) The discharging hopper is formed by welding steel plates and profile steel, and a storage self-grinding facility is arranged in the discharging hopper;

7) Sealing form: the sealing between the trolley (3-1) and the bellows adopts mechanical sealing; the trolley (3-1) and the smoke hood are sealed by water.

6. The high-temperature slag waste heat recovery system of claim 4, wherein,

the trolley (3-1) and the revolving frame (3-6) rotate anticlockwise from top to bottom in a overlook mode; 28 trolleys (3-1), 9 bellows (3-4), 9 dust discharging valves (3-5), 4 fans (3-3), 55000M air volume ³ /h；

Single machine processing capability: 80-95t/h; intermediate diameter of annular cooler: phi 12.5m; width of trolley (3-1): 1800mm, the main drive variable frequency motor (3-7) rotating speed: 320-970r/min.

7. The high temperature slag waste heat recovery system of claim 1, wherein: the inner wall of the box body (2-6) is provided with a wear-resistant lining, and a water cooling pipeline structure communicated with an external cooling water source is arranged between the outer wall of the box body and the wear-resistant lining.

8. The process of the high temperature slag waste heat recovery system of claim 1, wherein:

the temperature range of the treated slag of the crushing and granulating machine (2) is large: slag with the temperature range of 800-1700 ℃ can be treated, and liquid slag and solid slag can be granulated;

the granulating granularity result of the crushing granulator (2) can be adjusted according to the requirement, and the granularity range of slag is as follows: 0mm-80mm;

the temperature range of the materials received by the annular cooler (3) is wide: the temperature is 600-1300 ℃;

the cooling time of the annular cooler (3) is 30-80min, the annular cooler can be adjusted according to the process requirement, the annular cooler is divided into three-four sections in a week, the respective temperature is 700-1000 ℃ of the waste gas of the first cooling section, 400-600 ℃ of the second cooling section, 200-300 ℃ of the third cooling section, 120 ℃ of the fourth cooling section, the temperature difference range of each section is +/-10%,

the thickness of the material layer is 760+/-80 mm, and the wind pressure is as follows: 4300.+ -.10% Pa.